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  • AERODYNAMICS
  • Cell & Developmental Biology
  • Fisheries
  • Fluid Mechanics and Thermodynamics
  • Inorganic Chemistry
  • Limnology
  • Seismicity
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  • 2015-2019  (587)
  • 2000-2004  (2,002)
  • 1945-1949  (1,171)
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  • 1
    facet.materialart.
    Unknown
    Earthquakes in Switzerland and surrounding regions during 2015 and 2016 (2019)
    Details
    Publication Date: 2020-12-07
    Description: This report summarizes the seismicity in Switzerland and surrounding regions in the years 2015 and 2016. In 2015, the Swiss Seismological Service detected and located 735 earthquakes in the region under consideration. With a total of 20 earthquakes of magnitude ML C 2.5, the seismic activity of potentially felt events in 2015 was close to the average of 23 earthquakes over the previous 40 years. Seismic activity was above average in 2016 with 872 located earthquakes of which 31 events had ML C 2.5. The strongest event in the analyzed period was the ML 4.1 Salgesch earthquake, which occurred northeast of Sierre (VS) in October 2016. The event was felt in large parts of Switzerland and had a maximum intensity of V. Derived focal mechanisms and relative hypocenter relocations of aftershocks image a SSE dipping reverse fault, which likely also hosted an ML 3.9 earthquake in 2003. Another remarkable earthquake sequence in the Valais occurred close to Sion with four felt events (ML 2.7–3.2) in 2015/16. We associate this sequence with a system of WNW-ESE striking fault segments north of the Rhoˆne valley. Similarities with a sequence in 2011, which was located about 10 km to the NE, suggest the existence of an en-echelon system of basement faults accommodating dextral slip along the Rhoˆne-Simplon line in this area. Another exceptional earthquake sequence occurred close to Singen (Germany) in November 2016. Relocated hypocenters and focal mechanisms image a SW dipping transtensional fault segment, which is likely associated with a branch of the Hegau-Bodensee Graben. On the western boundary of this graben, micro-earthquakes close to Schlattingen (TG) in 2015/16 are possibly related to a NE dipping branch of the Neuhausen Fault. Other cases of earthquakes felt by the public during 2015/16 include earthquakes in the region of Biel, Vallorcine, Solothurn, and Savognin.
    Description: SwissEnergy (http:// www.energieschweiz.ch) and the Swiss Federal Office of Energy for the financial support of project GEOBEST-CH; Swiss Competence Center for Energy Research—Supply of Electricity (http://www.sccer-soe.ch); Swiss-AlpArray SINERGIA project CRSII2_154434/1 by the Swiss National Science Foundation (SNSF)
    Description: Published
    Description: 221–244
    Description: 2T. Sorgente Sismica
    Description: 1IT. Reti di monitoraggio
    Description: 5IT. Osservatori
    Description: JCR Journal
    Keywords: Seismicity ; Magnitude of completeness ; Focal mechanisms ; Seismotectonics ; Rhone-Simplon line ; Hegau-Bodensee graben ; Basel ; Aar massif ; 04. Solid Earth ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    Unknown
    A Complete Automatic Procedure to Compile Reliable Seismic Catalogs and Travel‐Time and Strong‐Motion Parameters Datasets (2019)
    Details
    Publication Date: 2021-02-26
    Description: The compilation of reliable and complete seismic catalogs represents a fundamental issue for most studies in seismology. Nowadays, the availability of an ever-increasing number of stations and, therefore, the huge amount of recordings to be processed and analyzed require a lot of effort in terms of man-hours. In the present work, we present a fully automatic procedure for compiling seismic catalogs starting from continuous recordings. The procedure relies on a multistep algorithm that includes event detection tool, automatic P- and S-phase picker, hypocenter locator, and magnitude and strong-motion parameter calculator. This automatic procedure is applied for compiling seismic catalogs for two real-world usage scenarios starting from the openaccess waveform database provided by European Integrated Data Archive. The first scenario concerns the monitoring of the seismicity of northwestern Italy; the second one concerns the analysis of the data recorded during the first month of the 2016 sequence in central Italy. The comparison between reference manually revised and automatic seismic catalogs points out negligible differences in terms of both P- and S-phase pickings, hypocentral coordinates, and local magnitude values, thus showing the overall reliability of the procedure. The ability of the proposed automatic procedure in detecting and locating very low-magnitude events is prominent to compile automatic catalogs characterized by a magnitude of completeness significantly lower than that of reference manual catalogs.
    Description: Published
    Description: 1308-1317
    Description: 8T. Sismologia in tempo reale
    Description: JCR Journal
    Keywords: Seismicity ; Seismic Catalogue ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
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    Unknown
    The Seismicity of Ischia Island (2019)
    Details
    Publication Date: 2021-03-09
    Description: Ischia is a volcanic island, west of the caldera of Campi Flegrei, southern Italy. Since the deployment of a modern seismic network in 1970, until the 21 August 2017 earthquake, the seismicity of Ischia has been characterized by low-magnitude (Md ≤ 2:3) earthquakes located in the northern part of the island, mostly beneath the town of Casamicciola Terme at very shallow depths (∼500 m). Some of these events seem to have occurred on the same seismogenetic structure in the northern part of the island. This area coincides with that where the devastating events of 1881 and 1883 occurred and where the small-magnitude seismicity recorded between 1927 and 1936 was located. The August 2017 seismic sequence affected the same area. The current network configuration is able to locate shallow events with Md ≥ 1:0 and to detect smaller earthquakes or other types of natural and artificial events (e.g., blast fishing, geothermal well explosions; see The Seismic Network section). Here, we present the catalog of earthquakes recorded on Ischia between 1999 and February 2018 and compare the August 2017 seismic sequence with the background seismicity. Furthermore, we identified a sequence of events possibly linked to the explosion of a geothermal well on the island.
    Description: This work benefited of the project “Sale operative integrate e reti di monitoraggio del futuro: l’INGV 2.0,” Fondo integrativo speciale per la ricerca (FISR) anni 2016 e 2017 (Delibera n. 78/2017). Furthermore, this work benefited of the agreement between Istituto Nazionale di Geofisica e Vulcanologia and Italian Department of Civil Protection (DPC).
    Description: Published
    Description: 1750-1760
    Description: 6V. Pericolosità vulcanica e contributi alla stima del rischio
    Description: JCR Journal
    Keywords: Ischia ; Seismic Network ; Seismicity
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 55 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 31 Artikel zu Themengebieten der Geophysik, inklusive einer Ausgabe zur "Internationalen Magnetosphären Studie" und einer Ausgabe "Elektromagnetik", veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1984.
    Description: Inhaltsverzeichnis: Journal of Geophysics 55 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0011.pdf"〉Seismicity and dynamics of the Upper Rhinegraben〈/a〉〈br〉 (Bonjer, K.-P., Gelbke, C., Gilg, B., Rouland, D., Mayer-Rosa, D., Massinon, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0012.pdf"〉The crustal structure of the southern Rhinegraben from re-interpretation of seismic refraction data〈/a〉〈br〉 (Zuccu, J. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0013.pdf"〉On the identification of a transition zone in electrical conductivity between the lithosphere and asthenosphere: a plea for more precise phase data〈/a〉〈br〉(Cavaliere, T., Jones, A. G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0014.pdf"〉The influence of geomagnetic variations on pipelines and an application for large-scale magnetotelluric depth sounding〈/a〉〈br〉 (Brasse, H., Junge, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0015.pdf"〉Some characteristics of the horizontal field variations around the geomagnetic jerk of 1970〈/a〉〈br〉 (Nevanlinna, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0016.pdf"〉Ground-based observations of a very intense substorm-related pulsation event〈/a〉〈br〉 (Lühr, H., Klöcker, N., Thürey, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0018.pdf"〉Dreidimensionale Seismik in der Exploration auf Kohlenwasserstoff-Lagerstätten〈/a〉〈br〉 (Dürschner, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0019.pdf"〉Long-term variations recorded by extensometers〈/a〉〈br〉 (Varga, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0020.pdf"〉Book reviews〈/a〉〈br〉 (Schneider, G., Jentzsch, G., Schick, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0021.pdf"〉Preface to the special issue ”Sixt Workshop on IMS observations in Northern Europe” held in Cumberland Logde, Windsor from 16-20 May 1983〈/a〉〈br〉 (Orr, D., Untiedt, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0022.pdf"〉Magnetospheric hydromagnetic waves: their eigenperiods, amplitudes and phase variations; a tutorial introduction〈/a〉〈br〉(Orr, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0023.pdf"〉ELF intensity levels at geostationary orbit and pulsating aurora〈/a〉〈br〉 (Ward, I. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0024.pdf"〉Ground observations of geomagnetic pulsations during a quiet magnetospheric interval correlated with satellite plasma measurements〈/a〉〈br〉 (Gough, H., Orr, D., Wedeken, U.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0025.pdf"〉Period, phase and resonant structure of a pulsation event seen by the ISEE 1 and 2 spacecraft on 2–3 April 1978〈/a〉〈br〉(Gardner, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0026.pdf"〉Pc5 pulsations and their possible source mechanisms: a case study〈/a〉〈br〉(Glaßmeier, K., Lester, M., Mier-Jedrzejowicz, W., Green, C., Rostoker, G., Orr, D., Wedeken, U., Junginger, H., Amata, E.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0027.pdf"〉Ground-satellite coordinated study of the April 5, 1979 events: flux variations of energetic particles and associated magnetic pulsations〈/a〉〈br〉(Wedeken, U., Inhester, B., Korth, A., Glaßmeier, K., Gendrin, R., Lanzerotti, L., Gough, H., Green, C., Amata, E., Pedersen, A., Rostoker, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0028.pdf"〉Ground-satellite coordinated study of the April 5, 1979 events: observation of O〈sup〉+〈/sup〉 cyclotron waves〈/a〉〈br〉(Inhester, B., Wedeken, U., Korth, A., Perraut, S., Stokholm, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0029.pdf"〉Preface to an “electromagnetic issue” initiated by a symposium of IAGA Working Group I-3 on August 23, 1983, during the IUGG General assembly in Hamburg〈/a〉〈br〉(Haak, V.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0030.pdf"〉Deep electromagnetic studies of the Baltic Shield〈/a〉〈br〉(Hjelt, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0031.pdf"〉Magnetometer array studies in Finland – determination of single station transfer functions〈/a〉〈br〉(Pajunpää, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0032.pdf"〉Models of geoelectrical anomalies in Czechoslovakia〈/a〉〈br〉(Červ, V., Pek, J., Praus, O.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0033.pdf"〉The electrical conductivity of the Andean crust in northern Chile and southern Bolivia as inferred from magnetotelluric measurements〈/a〉〈br〉(Schwarz, G., Haak, V., Martínez, E., Bannister, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0034.pdf"〉Electrical conductivity of the asthenosphere〈/a〉〈br〉(Vanyan, L.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0035.pdf"〉A high conductivity anomaly on the West African craton (Mali)〈/a〉〈br〉(Ritz, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0036.pdf"〉Search for a possible electromagnetic coupling between a transatlantic communication cable and the magma chamber in the mid-Atlantic ridge〈/a〉〈br〉(Meloni, A., Gregori, G., Lanzerotti, L., Medford, L.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0038.pdf"〉A new pulsed audiomagnetotelluric technique〈/a〉〈br〉(Schnegg, P.-A., Fischer, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0039.pdf"〉Preliminary results of MHD test registrations in northern Finland〈/a〉〈br〉(Heikka, J., Zhamaletdinov, A., Hjelt, S., Demidova, T., Velikhov, Y.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0040.pdf"〉Bimodal induction in non-uniform thin sheets: do the present algorithms work for regional studies?〈/a〉〈br〉(Mareschal, M., Vasseur, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0041.pdf"〉Solution of the stationary approximation for MT fields in the layered Earth with 3D and 2D inhomogeneities〈/a〉〈br〉(Hvoždara, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0042.pdf"〉Analogue-model magnetic field responses of an ocean channel, an island and a seamount in the Hainan Island region〈/a〉〈br〉(Hu, W. B., Dosso, H. W., Nienaber, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0055/LOG_0043.pdf"〉Conductivity modellling of the Earth using solar and lunar daily magnetic variations〈/a〉〈br〉(Winch, D. E.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; Africa ; Asthenosphere ; Aurora ; Baltic Shield ; China ; Czechoslovakia ; Earth’s Crust ; ELAS project ; Electrojets ; Electromagnetic Induction ; ELF waves ; Exploration Seismics ; Geomagnetic Induction Studies ; Geomagnetic Pulsations ; Geomagnetic Secular Variation ; Geomagnetic Variations ; Hydromagnetic Waves ; Ion Cyclotron Waves ; Magnetometer Arrays ; Magnetospheric Plasma ; Magnetotellurics ; MHD generator ; Pipelines ; Refraction Seismology ; Rhinegraben ; Satellite Observations ; Seismicity ; South America ; Transatlantic Cable ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 5
    facet.materialart.
    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 45 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:45
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 44 Artikel zu Themengebieten der Seismologie, Erdmagnetismus und Gesteinsphysik veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1978.
    Description: Inhaltsverzeichnis: Journal of Geophysics 45 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0010.pdf"〉Magnetotelluric investigation of the lower crust and upper mantle Beneath Iceland〈/a〉〈br〉 (Beblo, M., Björnsson, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0011.pdf"〉Damped and constrained least squares method with application to gravity interpretation〈/a〉〈br〉 (Vigneresse, J. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0012.pdf"〉Reappraisal of palaeomagnetism of the Colli Euganei and Monti Lessini Volcanics (Italy) 〈/a〉〈br〉 (Channell, J. E. T., De Zanche, V., Sedea, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0013.pdf"〉Reinterpretation of palaeomagnetism of the Colli Euganei and Monti Lessini (Italy) 〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0014.pdf"〉Observations of the initial develpopment of an auroral and magnetic substorm at magnetic midnight〈/a〉〈br〉 (Untiedt, J., Pellinen, R., Küppers, F., Opgenoorth, H. J., Pelster, W. D., Baumjohann, W., Ranta, H., Kangas, J., Czechowsky, P., Heikkila, W. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0015.pdf"〉Ionospheric observation of gravity-waves associated with hurricane Eloise〈/a〉〈br〉 (Hung, R.J., Kuo, J. P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0016.pdf"〉On the annual wave of hemispheric geomagnetic activity〈/a〉〈br〉 (Damaske, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0017.pdf"〉Solar electron fluxes, increased geomagnetic activity and ionospheric absorption following selected flares〈/a〉〈br〉 (Märcz, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0018.pdf"〉The H amplitude of sudden commencements of magnetic storms at Sabhawala (Dehra Dun) 〈/a〉〈br〉 (Jain, A. R., Sastri, N. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0019.pdf"〉Crustal structure of the Reykjanes Ridge at 63° N derived from seismic measurements〈/a〉〈br〉 (Snoek, M., Goldflam, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0020.pdf"〉Book review〈/a〉〈br〉 (Strobach, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0021.pdf"〉Electron density in the South Atlantic anomaly region〈/a〉〈br〉 (Noor Sheikh, M., Rawer, K., Neske, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0023.pdf"〉Inversion of satellite magnetic anomaly data〈/a〉〈br〉 (Mayhew, M. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0026.pdf"〉The effect of earth structure on radial oscillations〈/a〉〈br〉 (Wang, C., Cleary, J. R., Anderssen, R. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0027.pdf"〉Relationship between the seismic quality factor Q and the effective viscosity η〈/a〉〈br〉 (Meissner, R. O., Vetter, U. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0028.pdf"〉The wave field associated with a fine structured moho in continents and oceans〈/a〉〈br〉 (Kosminskaya, I. P., Kapustian, N. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0029.pdf"〉Tidal triggering of earthquakes in the Swabian jura? 〈/a〉〈br〉 (Young, D., Zürn, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0030.pdf"〉Theoretical investigations on acoustic remote sensing of ocean surface waves〈/a〉〈br〉 (Essen, H.-H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0031.pdf"〉A comparison of results of geothermal and magnetotelluric investigations in northwestern Germany〈/a〉〈br〉 (Knödel, K., Losecke, W., Wohlenberg, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0032.pdf"〉Effect of the coastline configuration of south Indian and Sri Lanka regions on the induced field at short period〈/a〉〈br〉 (Takeda, M., Maeda, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0034.pdf"〉Correction of graphs concerning the Chapman-Ferraro image method〈/a〉〈br〉 (Burkard, O. M., Rucker, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0036.pdf"〉On the difference between polarisation and coherence〈/a〉〈br〉 (Jones, A. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0037.pdf"〉Palaeosecular variation studies of the Brunhes epoch in the volcanic province of the East-Eifel, Germany〈/a〉〈br〉 (Kohnen, H., Westkämper, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0038.pdf"〉Book review〈/a〉〈br〉 (Vees, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0039.pdf"〉Sixth annual meeting of the European Geophysical Society〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0040.pdf"〉Partial self-reversal of natural remanent magnetization of an historical lava flow of Mt. Etna (Sicily) 〈/a〉〈br〉 (Heller, F., Markert, H., Schmidbauer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0044.pdf"〉Palaeomagnetic study of the tertiary volcanics of Sardinia〈/a〉〈br〉 (Edel, J.-B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0046.pdf"〉Analysis of an eastward electrojet by means of upward continuation of ground-based magnetometer data〈/a〉〈br〉 (Mersmann, U., Baumjohann, W. Küppers, F., Lange, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0048.pdf"〉Non-linear rheology and return flow in the mantle〈/a〉〈br〉 (Jacoby, W. R., Ranalli, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0051.pdf"〉Crustal and upper mantle structure beneath the Apennines region as inferred from the study of Rayleigh waves〈/a〉〈br〉 (Calcagnile, G., Panza, G. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0053.pdf"〉On the coastal effect on geoelectrical soundings〈/a〉〈br〉 (Mundry, E., Worzyk, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0054.pdf"〉Observations of sPn from Swabian Alb earthquakes at the GRF array〈/a〉〈br〉 (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0055.pdf"〉Macroseismic intensity map of Austria for the Swabian Alb earthquake of September 3, 1978〈/a〉〈br〉 (Drimmel, J., Fiegweil, E., Lukeschitz, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0056.pdf"〉Das Schwerefeld im Bereich der Nordfriesischen Inseln und des benachbarten Festlands〈/a〉〈br〉 (Plaumann, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0057.pdf"〉Probable relations between seismic anisotropy and a fine structure of the lithosphere〈/a〉〈br〉 (Meissner, R. O., Flüh, E. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0058.pdf"〉Book reviews〈/a〉〈br〉 (Burkhardt, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0059.pdf"〉Reinterpretation of a deep-seismic-sounding profile on the Ukrainian shield〈/a〉〈br〉 (Jentsch, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0062.pdf"〉Extensions of the reflectivity method〈/a〉〈br〉 (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0063.pdf"〉Ray amplitudes of compressional, shear and converted seismic body waves in 3D laterally inhomogeneous media with curved interfaces〈/a〉〈br〉 (Pšenčík, I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0064.pdf"〉Spectral analysis of Pc3 and Pc4 pulsations with regard to the dayside plasmapause position〈/a〉〈br〉 (Palandt, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0065.pdf"〉A theoretical investigation of the dipole- and unipole-resistivity methods for geoelectrical prospecting in Marine areas〈/a〉〈br〉 (Sebulke, J., Hildebrandt, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0066.pdf"〉Paleomagnetism and rock magnetism of the Pliocene Rhyolite at San Vincenzo, Tuscany, Italy〈/a〉〈br〉 (Lowrie, W., Alvarez, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0067.pdf"〉On the presence of titanomagnetite in basalts〈/a〉〈br〉 (Radhakrishnamurty, C., Deutsch, E. R., Murthy, G. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0045/LOG_0068.pdf"〉Palaeomagnetism of permo-triassic red sandstones from the northern Calcareous Alps〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Auroral Electrojet ; Austria ; Chapman-Ferraro Model ; Crustal Structure ; Earth Models ; Earthquakes ; Earth's Mantle ; Electrical Conductivity Anomalies ; Electromagnetic Induction ; Explosion Seismology ; Free Oscillation of Earth ; Geoelectrics ; Geomagnetic Activity ; Geomagnetic Pulsations ; Geothermics ; Germany ; Gravity Anomalies ; Hurricanes ; Iceland ; India ; Inverse Problems ; Ionosphere ; Ionosphäre ; Italy ; Lithosphere ; Magnetic Anomalies ; Magnetotellurics ; Moho ; Ocean Surface Waves ; Palaeomagnetism ; Polarisation Analysis ; Plasmapause ; Remote Sensing ; Rock Magnetism ; Seismic Anisotropy ; Seismicity ; Seismic Quality Factor Q ; Seismic Surface Waves ; Theoretical Seismograms ; USSR ; Viscosity of Earth ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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  • 6
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    Estimation of awareness of fisheries students with regarding to benefits of fish consumption (2019)
    Details
    Publication Date: 2021-05-19
    Description: Regarding the importance of increment of fish per capita consumption in the health of the society, it is important to understand the benefits of fish and its nutritional value to prevent and treat some diseases. The research aimed to investigate the awareness of fisheries students about the benefits and fish nutritional value to promote the fish consumption in their household and future occupational in society. Students' information questionnaire of two universities on the content of lipids and proteins, vitamins, minerals, amino acids, fatty acids, reasons for fish consumption and their therapeutic effects were collected in 2017. After analyzing Chi-squared and Friedman test and scoring the correct answers, 64.4% of the students did not affect the consumption of their household fish consumption after their acceptance. Fish per capita consumption of students was calculated to be 23.3 kilograms. In their view, Iodine is the richest element in fish to prevent goiter. Cardiovascular disease, Alzheimer and cancer are prevented using fish consumption. With a mean score of 7.53 and a score of 18 at most, 16.4 % of students had awareness of the benefits of fish. The result of the study revealed the need for more serious training and more attention to the fish benefits and nutritional value of the fisheries course curriculum, so that they can be better promoters for the fish consumption among people and their families.
    Description: Published
    Keywords: Awareness ; Fish benefits ; Fish consumption ; Fisheries education ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.79-91
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  • 7
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    Organotropism of organic and inorganic mercury in fish from the Vistula Lagoon, Poland. (2019)
    Details
    Publication Date: 2021-05-19
    Description: Our paper presents the results of a study on the concentrations of total (Hgtotal), organic (CH3Hg+) and inorganic (Hginorg) mercury in freshwater fish from the Vistula Lagoon, coastal waters of the Baltic Sea. Mercury assays were performed on tissues (muscle, skin, gills) and internal organs (heart, spleen, liver, gastrointestinal tract, gonads) of pikeperch, common roach, and common bream. The distributions of Hgtotal, CH3Hg+, and Hginorg depending on fish species, tissue, or organ and bioaccumulation in tissues and biomagnification in the trophic chain were determined. Interspecific and intraspecific differences in mercury concentrations occurred in fish tissues and organs. Muscles of pikeperch, bream and roach accumulated the highest concentration of CH3Hg+, Hginorg dominating in the gastrointestinal tract of bream and roach. The concentration gradations of Hgtotal and CH3Hg+ depending on fish species were as follows: pikeperch 〉 common roach 〉 common bream. For Hginorg, the gradations were as follows: common bream 〉 common roach 〉 pikeperch. The type of food was a determining criterion for the distribution of mercury forms in the tissues and organs of the fish studied, and quantifiable confirmation of this was the different values of the L:M coefficient (Hginorg in the hepatic tissue : CH3Hg+ in muscle). Differences in Hgtotal, CH3Hg+, and Hginorg concentrations in fish tissues and organs were linked with the food the fish consume, their position in the trophic chain and biomagnification in the food chain.
    Description: Published
    Keywords: Biomagnification ; Fisheries ; Animal bioengineering ; Pollution ; Environment ; ASFA_2015::M::Mercury ; ASFA_2015::F::Freshwater fish ; ASFA_2015::B::Bioaccumulation
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: pp.589-602
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    On the Use of Optimization Techniques for Turbulence Model Calibration (2019)
    In:  CASI
    Details
    Publication Date: 2019-05-24
    Description: This article discusses the use of numerical optimization procedures to aid in the calibration of turbulence model coefficients. Such methods would increase the rigor and repeatability of the calibration procedure by requiring clearly defined and objective optimization metrics, and could be used to identify unique combinations of coefficient values for specific flow problems. The approach is applied to the re-calibration of an explicit algebraic Reynolds stress model for the incompressible planar mixing layer using the Nelder-Mead simplex algorithm and a micro-genetic algorithm with minimally imposed constraints. Three composite fitness functions, each based upon the error in the mixing layer growth rate and the normal and shear components of the Reynolds stresses, are investigated. The results demonstrate a significant improvement in the target objectives through the adjustment of three pressure-strain coefficients. Adjustments of additional coefficients provide little further benefit. Issues regarding the effectiveness of the fitness functions and the efficiency of the optimization algorithms are also discussed.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220163 , E-19680 , GRC-E-DAA-TN65018
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    FUN3D Manual: 13.5 (2019)
    In:  CASI
    Details
    Publication Date: 2019-05-24
    Description: This manual describes the installation and execution of FUN3D (Fully-UNstructured three-dimensional CFD (Computational Fluid Dynamics) code) version 13.5, including optional dependent packages. FUN3D is a suite of computational fluid dynamics simulation and design tools that uses mixed-element unstructured grids in a large number of formats, including structured multiblock and overset grid systems. A discretely-exact adjoint solver enables efficient gradient-based design and grid adaptation to reduce estimated discretization error. FUN3D is available with and without a reacting, real-gas capability. This generic gas option is available only for those persons that qualify for its beta release status.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220271 , L-21013 , NF1676L-32825
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    WRLES: Wave Resolving Large-Eddy Simulation Code, Theory and Usage (2019)
    In:  CASI
    Details
    Publication Date: 2019-05-11
    Description: A computational fluid dynamics code has been developed for large-eddy simulations (LES) of turbulent flow. The code uses high-order of accuracy and high-resolution numerical methods to minimize solution error and maximize the resolution of the turbulent structures. Spatial discretization is performed using explicit central differencing. The central differencing schemes in the code include 2nd- to 12th-order standard central difference methods as well as 7-, 9-, 11- and 13-point dispersion relation preserving schemes. Solution filtering and high-order shock capturing are included for stability. Time discretization is performed using multistage Runge-Kutta methods that are up to 4th order accurate. Several options are available to model turbulence including: Baldwin-Lomax and Spalart-Allmaras Reynolds-averaged Navier-Stokes turbulence models, and Smagorinsky, Dynamic Smagorinsky and Vreman sub-grid scale models for LES. This report presents the theory behind the numerical and physical models used in the code and provides a user's manual to the operation of the code.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220192 , GRC-E-DAA-TN67540
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  • 11
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    Predictive Thermal Control (PTC) Technology to Enable Thermally Stable Telescopes (2019)
    In:  CASI
    Details
    Publication Date: 2019-06-20
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: MSFC-E-DAA-TN69842-1
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    Predictive Thermal Control (PTC) Technology to Enable Thermally Stable Telescopes (2019)
    In:  CASI
    Details
    Publication Date: 2019-06-20
    Description: The Predictive Thermal Control (PTC) technology development project is a multiyear effort initiated in Fiscal Year (FY) 2017, to mature the Technology Readiness Level (TRL) of critical technologies required to enable ultra-thermally-stable telescopes for exoplanet science. A key PTC partner is Harris Corporation (Rochester NY).
    Keywords: Fluid Mechanics and Thermodynamics
    Type: MSFC-E-DAA-TN69842-2
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  • 13
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    Rough-Wall Turbulent Heat Transfer Experiments in Hypersonic Free Flight (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-01
    Description: Experiments are being conducted in the NASA Ames Hypervelocity Free Flight Aerodynamic Facility to quantify the effects on turbulent convective heat transfer of surface roughness representative of a new class of 3D woven thermal protection system mRough-wall turbulent heat transfer measurements were obtained on ballistic-range models in hypersonic flight in the NASA Ames Hypervelocity Free Flight Aerodynamic Facility. Each model had three different surface textures on segments of the conic frustum: smooth wall, sand roughness, and a pattern roughness, thus providing smooth-wall and sand-roughness reference data for each test. The pattern roughness was representative of a woven thermal protection system material developed by NASA's Heatshield for Extreme Entry Environment Technology project. The tests were conducted at launch speeds of 3.2 km/s in air at 0.15 atm. Roughness Reynolds numbers, k+, ranged for 12 to 70 for the sand roughness, and as high as 200 for the pattern roughness. Boundary-layer parameters required for calculating k+ were evaluated using computational fluid dynamics simulations. The effects of pattern roughness are generally characterized by an equivalent sand roughness determined with a correlation developed from experimental data obtained on specifically-designed roughness patterns that do not necessarily resemble real TPS materials. Two sand roughness correlations were examined: Dirling and van Rij, et al. Both gave good agreement with the measured heat-flux augmentation for the two larger pattern roughness heights tested, but not for the smallest height tested. It has yet to be determined whether this difference is due to limitations in the experimental approach, or due to limits in the correlations used. Future experiments are planned that will include roughness patterns more like those used in developing the equivalent sand roughness correlations.aterials being developed by NASA's Heatshield for Extreme Entry Environment Technology (HEEET) project. Data were simultaneously obtained on sand-grain roughened surfaces and smooth surfaces, which can be compared with previously obtained data. Results are presented in this extended abstract for one roughness pattern. The full paper will include results from three roughness patterns representing virgin HEEET, nominal turbulent ablated HEEET, and twice the roughness of nominal turbulent ablated HEEET. Results will be used to compare with commonly used equivalent sand grain roughness correlations.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN69052 , AIAA Aviation Forum 2019; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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  • 14
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    Overview of the Development and Testing of the Heatshield for Extreme Entry Environment Technology (HEEET) TPS (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Over the last 5 years, the Heatshield for Extreme Entry Environment Technology (HEEET) project has been working to mature a 3-D Woven Thermal Protection System (TPS) to Technical Readiness Level (TRL) 6 to support future NASA missions to destinations such as Venus and Saturn. A key aspect of the project has been the development of the manufacturing and integration processes/procedures necessary to build a heat shield utilizing the HEEET 3D-woven material. This has culminated in the building of a 1-meter diameter Engineering Test Unit (ETU) representative of what would be used for a Saturn probe. The present talk provides an overview of recent testing of NASA's Heatshield for Extreme Entry Environment Technology (HEEET) 3D Woven TPS. Under the current program, the ETU has been subjected to Thermal and Mechanical loads typical of deep space mission to Saturn. Thermal testing of HEEET coupons has performance up to 4,500 watts per centimeter squared at 5 atmospheres stagnation pressure and successful shear performance up to 3000 pascals at 1,650 watts per centimeter squared at 2.6 atmospheres pressure.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN65177 , National Space & Missile Materials Joint Symposium (NSMMS 2019); Jun 24, 2019 - Jun 27, 2019; Henderson, NV; United States|Commercial and Government Responsive Access to Space Technology Exchange Joint Symposium (CRASTE 2019); Jun 24, 2019 - Jun 27, 2019; Henderson, NV; United States
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    Laser Rayleigh Scattering for Flow Density and Condensation Measurements in the Supercooled Mach-14 Free-Stream at AEDC Wind Tunnel No. 9 (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Laser Rayleigh scattering was used to investigate clusters in the free-stream flow at Arnold Engineering Development Centers Tunnel 9 (T9). The facility was run at Mach-14, with a pure-N2 flow medium, and at several total pressures and temperatures. Using an excimer laser operating at 248 nm, the Rayleigh instrument imaged scattering from the focused laser beam in the free-stream. As a wind-tunnel flow is accelerated, it cools and approaches the condensation boundary. As a precursor to condensation, small clusters of molecules are first formed, but the individual clusters are too small to be spatially resolved in typical images of the beam. Thus clusters effectively add a spatially smooth background signal to the pure diatomic-molecule Rayleigh signal. The main result of the present work is that clustering was not significant. After correcting for interference by small particles imbedded in the T9 flow, cluster scattering was unobservable or smaller than one standard deviation (1-sigma) of the uncertainties for almost all tunnel runs. The total light scattering level was measured to be 1.05 +/- 0.15 (1-sigma) of the expected diatomic scattering, when averaged over the entire usable data set. This result included flow conditions that were supercooled to temperatures of ~ 20 K, about 25 K below the condensation limit of ~ 45 K. Thus the Mach-14 nozzle flow is essentially cluster-free for many supercooled conditions that might be used to extend the facility operating range to larger Reynolds numbers.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220259 , L-21001 , NF1676L-32466
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    Risk Analysis Associated with Loss of Toxic Gases During Orion Landing and Recovery Operations (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Mission, landing and recovery operations for the Orion crew module involve reentry into the Earth's atmosphere and the deployment of three Nomex parachutes to slow the descent before landing along the west coast of the United States. Orion may have residual fuel (hydrazine, N2H4) or coolant (ammonia, NH3) on board which are both highly toxic to crew in the event of exposure. These risks were evaluated using a first principles analysis approach through fluid dynamics modeling. Plume calculations were first performed with the ANSYS Fluent computational fluid dynamics code. Data were then extracted at locations relevant to crew safety such as the snorkel fan inlet and the egress hatch. Mixing calculations were performed to quantify exposure concentrations within the crew bay before and during egress and departure. Finally, results included herein were used to inform the Orion post-landing Concept of Operations (ConOps) so that strategies could be formulated to maintain crew safety in the event of the loss of fuel or coolant.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: JSC-E-DAA-TN62706 , International Conference on Environmental Systems; Jul 07, 2019 - Jul 11, 2019; Boston, MA; United States
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    Thermal Performance of an Aluminum/Ammonia Heat Pipe Under Reflux Mode (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: During instrument-level or spacecraft-level ground testing, heat pipes may be placed in reflux mode, with condenser above evaporator. A liquid pool will form at the bottom of the heat pipe. If heat is applied to a site below the surface of the liquid pool in a vertical heat pipe, the heat pipe can work properly under reflux mode. A superheat is required for startup. If heat is applied to a site above the liquid pool, the heat pipe is not expected to work unless additional heat is applied to the liquid pool to provide the needed flow circulation. There are many reason to minimize the additional heater power. An experimental investigation was conducted to study the heat pipe behavior under this configuration.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GSFC-E-DAA-TN66142 , Spacecraft Thermal Control Workshop; Mar 26, 2019 - Mar 28, 2019; Torrance, CA; United States
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  • 18
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    Microgravity Liquid-Gas Two-Phase Flow: Review of Pressure Drop and Heat Transfer Correlations and Guidelines for Equipment Operability (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: In this report we have catalogued the flow regimes observed in microgravity, summarized correlations for the pressure drop and rate of heat transfer that are commonly used, and discuss the validation of a few correlations from available experimental results. Two-phase flow through some specific components such as bends, tees, filters and pumps are discussed from a physical perspective to guide the designer on how reduced gravity might affect their performance. Phase separation in zero gravity is addressed through the behavior and basic design concepts for devices based on passive centrifugal action, capillary forces, gas extraction through a membrane installed in a channel wall and the use of a syringe with a perforated piston to remove bubbles from small liquid volumes. We address the common instabilities that develop in flow loops owing exclusively to the two-phase nature of the flow, e.g., Ledinegg instability and concentration waves. Finally we briefly review flow metering and gauging; two-phase flow through porous media, where pressure drop and flow regime map correlations in zero-g are a current research topic; and basic operation principles of heat pipes and capillary pumped loops.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220147 , E-19668 , GRC-E-DAA-TN65638
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    An Experimental Investigation of a Wing-Fuselage Junction Model in the NASA Langley 14- by 22-Foot Subsonic Tunnel (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Current turbulence models, such as those employed in Reynolds-averaged Navier-Stokes CFD, are unable to reliably predict the onset and extent of the three-dimensional separated flow that typically occurs in wing-fuselage junctions. To critically assess, as well as to improve upon, existing turbulence models, experimental validation-quality flow-field data in the junction region is needed. In this report, we present an overview of experimental measurements on a wing-fuselage junction model that addresses this need. The experimental measurements were performed in the NASA Langley 14- by 22-Foot Subsonic Tunnel. The model was a full-span wing-fuselage body that was configured with truncated DLR-F6 wings, both with and without leading-edge extensions at the wing root. The model was tested at a fixed chord Reynolds number of 2.4 million, and angles-of-attack ranging from -10 degrees to +10 degrees were considered. Flow-field measurements were performed with a pair of miniature laser Doppler velocimetry (LDV) probes that were housed inside the model and attached to three-axis traverse systems. One LDV probe was used to measure the separated flow field in the trailing-edge junction region. The other LDV probe was alternately used to measure the flow field in the leading-edge region of the wing and to measure the incoming fuselage boundary layer well upstream of the leading edge. Both LDV probes provided measurements from which all three mean velocity components, all six independent components of the Reynolds-stress tensor, and all ten independent components of the velocity triple products were calculated. In addition to the flow-field measurements, static and dynamic pressures were measured at selected locations on the wings and fuselage of the model, infrared imaging was used to characterize boundary-layer transition, oil-flow visualization was used to visualize the separated flow in the leading- and trailing-edge regions of the wing, and unsteady shear stress was measured at limited locations using capacitive shear-stress sensors. Sample results from the measurement techniques employed during the test are presented and discussed.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220286 , NF1676L-33264
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    InSight's Reconstructed Aerothermal Environments (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The InSight Mars Lander successfully landed on the surface on November 26, 2018. This poster will describe the methodologies and margins used in developing the aerothermal environments for design of the thermal protection systems (TPS), as well as a prediction of as-flown environments based on the best estimated trajectory. The InSight mission spacecraft design approach included the effects of radiant heat flux to the aft body from the wake for the first time on a US Mars Mission, due to overwhelming evidence in ground testing for the European ExoMars mission (2009/2010) [1] and 2010 tests in the Electric Arc Shock Tube (EAST) facility [2]. The radiant energy on an aftbody was also recently confirmed via measurement on the Schiaparelli mission [3]. In addition, the InSight mission expected to enter the Mars atmosphere during the dust storm season, so the heatshield TPS was designed to accommodate the extra recession due to the potential dust impact. This poster will compare the predicted aerothermal environments using the reconstructed best estimated trajectory to the design environments. Design Approach: The InSight spacecraft was planned to be a near-design-to-print copy of the Phoenix spacecraft. The determination of the heatshield TPS requirements was approached as if it was a new design due to the new requirement of flying through a dust storm. The baseline for aftbody was build-to-print, and all analyses focused on ensuring adequate margin. This proved to be a challenge because the Phoenix aftbody was designed to withstand only convective heating and the InSight aftbody was evaluated for both convective and radiative heating. Aerothermal environments were predicted using the Langley Aerothermodynamic Upwind Relaxation Algorithm (LAURA) and the Data Parallel Line Relaxation (DPLR) CFD codes, and the Nonequilibrium Radiative Transport and Spectra Program (NEQAIR) utilizing bounding design trajectories derived from Monte Carlo analyses from the Program to Optimize Simulated Trajectories II (POST2). In all cases, super-catalytic flowfields were assigned to ensure the most conservative heating results. Two trajectories were evaluated: 1) the trajectory with the maximum heat flux was utilized to determine the flowfield characteristics and the viability of the selection of TPS materials; and 2) the trajectory with the maximum heat load was used to determine the required thicknesses of the TPS materials. Evaluation of the MEDLI data [4], along with ground test data [5] led to the determination of whether or not the flow would transition from laminar to turbulent on the heatshield, which also determined the TPS sizing location for the heatshield. Aerothermal margins were added for the convective heating and developed for the radiative heating. TPS material sizing was determined with the Reaction Kinetic Ablation Program (REKAP) and the Fully Implicit Ablation and Thermal Analysis program (FIAT) using a three-branched approach to account for aerothermal, material response, and material properties uncertainties. In addition, the heatshield recession was augmented by an analysis of the effect of entry through a potential dusty atmosphere using a methodology developed in References [6] and [7]. These analyses resulted in an increase to the Phoenix heatshield TPS thickness. Reconstruction Efforts: Once the best estimated trajectory is reconstructed by the team, the LAURA/HARA (High-Temperature Aerothermo-dynamic Radiation model) and DPLR/NEQAIR code pairs will be used to predict the as-flown aerothermal conditions. In these runs, fully-catalytic flowfields will be assigned because it is a more physically accurate description of the chemistry in the flow. Once again, determination of the onset of turbulence on the heatshield will be evaluated. The as-flown aerothermal environments will then be compared to the design environments.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN66480 , International Planetary Probe Workshop - 2019; Jul 08, 2019 - Jul 12, 2019; Oxford, England; United Kingdom
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    Utilization of Micro Tube Heat Exchanger for Next Generation Phase Change Material Heat Exchanger Development (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-17
    Description: Abstract and not the Final document is attached. Low Lunar orbit presents a unique thermal environment with high planetary and high solar IR requirements. Orion requires a phase change material heat exchanger (PCM HX) to act as a supplemental heat rejection device (SHReD) during this orbit. As a result, Orion currently uses a PCMHX to meet heat rejection demands in low lunar orbit. This PCM HX weighs 145 lbs, a significant amount of weight on the Crew Module Adaptor. To reduce this weight, a new PCM HX and phase change material is being proposed. This new PCM HX, constructed by Mezzo technologies, was originally designed as a water based PCM HX but is now be repurposed for phase change materials with transition temperatures in Orion's set points and different freeze front propagations. Mezzo's PCM HX utilizes micro tubes which greatly increase the overall heat transfer efficiency allowing for a compact design and significant weight savings. A new phase change material is also being proposed which has a higher latent heat of fusion as well as a higher density. This paper investigates the design, testing, and analysis done on the new Mezzo PCM HX as well as the corresponding phase change material.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: JSC-E-DAA-TN62557 , International Conference on Environmental Systems (ICES); Jul 07, 2019 - Jul 11, 2019; Boston, MA; United States
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    Predicted Ice Shape Formations on a Boundary Layer Ingesting Engine Inlet (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Computational ice shapes were generated on the boundary layer ingesting engine nacelle of the D8 Double Bubble aircraft. The computations were generated using LEWICE3D, a well-known CFD icing post processor. A 50-bin global drop diameter discretization was used to capture the collection efficiency due to the direct impingement of water onto the engine nacelle. These discrete results were superposed in a weighted fashion to generate six drop size distributions that span the Appendix C and O regimes. Due to the presence of upstream geometries, i.e. the fuselage nose, the trajectories of the water drops are highly complex. Since the ice shapes are significantly correlated with the collection efficiency, the upstream fuselage nose has a significant impact on the ice accretion on the engine nacelle. These complex trajectories are caused by the ballistic nature of the particles and are thus exacerbated as particle size increases. Shadowzones are generated on the engine nacelle, and due to the curvature of the nose of the aircraft the shadowzone boundary moves from lower inboard to upper outboard as particle size increases. The largest particle impinging one the engine nacelle from the 50-bin discretization was the 47 um drop diameter. As a result, the MVD greater than 40 um Appendix O conditions were characterized by extremely low collection efficiency on the engine nacelle for these direct impingement simulations.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN66779 , International Conference on Icing of Aircraft, Engines, and Structures; Jun 17, 2019 - Jun 21, 2019; Minneapolis, MN; United States
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    Full Facility Shock Frame Simulations of the Electric Arc Shock Tube (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Radiative heating computations are performed for high speed lunar return experiments conducted in the Electric Arc Shock Tube (EAST) facility at NASA Ames Research Center. The nonequilibrium radiative transport equations are solved via NASA's in-house radiation code NEQAIR using flow field input from US3D flow solver. The post-shock flow properties for the 10 km/s Earth entry conditions are computed using the stagnation line of a blunt-body and a full facility CFD (Computational Fluid Dynamics) simulation of the EAST shock tube. The shocked gas in the blunt-body flow achieves a thermochemical equilibrium away from the shock front whereas EAST flow exhibits a nonequilibrium behavior due to strong viscous dissipation of the shock by boundary layer. The full-tube flow calculations capture the influence of the boundary layer on the shocked gas state and provide a realistic fluid dynamic input for the radiative predictions. The integrated radiance behind the shock is calculated in NEQAIR for wavelength regimes from Vacuum-UltraViolet (VUV) to InfraRed (IR), which are pertinent to the emission characteristics of high enthalpy shock waves in air. These radiance profiles are validated against corresponding EAST shots. The full-tube simulations successfully predict a sharp radiance peak at the shock front which gets smeared in the test data due to the spatial resolution in the measurements. The full facility based radiance behind the shock shows a slightly better match with the test data in the VUV and Red spectral regions, as compared to that from a blunt-body based predictions. The UV radiance is very similar for both geometries and under-predicts the test behavior. The IR test data matches better with the blunt-body based predictions where the full-tube simulations show a significant over-prediction.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN57169 , AIAA SciTech Forum & Exposition (SciTech 2019); Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Time Accurate Simulation of Nonequilibrium Flow Inside the NASA Ames Electric Arc Shock Tube (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Numerical investigations of the flowfield inside NASA Ames' Electric Arc Shock Tube have been performed. The focus is to simulate the experiments designed to reproduce shock layer radiation layer relevant to Earth re-entry conditions. This paper assess the current computational capability in simulating time-accurate unsteady nonequilibrium flows in the presence of strong shock waves with state-of-the-art physical models. The technical approach is described with preliminary results presented for one specific flow condition. It was found that the axisymmetric source term generates a numerical instability that appears as shock bending. This instability is time dependent which greatly affects the shock speed. Post-shock conditions are discussed and compared to CEA equilibrium prediction and good agreement was obtained close to the test-section and just behind the shock.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN64558 , AIAA SciTech Forum 2019; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Technology Readiness Assessment for HEEET TPS (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-03
    Description: The HEEET project was conceived to develop a heatshield with a high performance ablative thermal protection material that can withstand the extreme entry environment produced as a result of rapid deceleration during high speed entry into Venus, Saturn, Uranus or higher speed entry into Earth's atmosphere. Successful maturation of HEEET supports future New Frontiers and Discovery AO's, as well as Flagship and directed missions in the longer term. In addition, HEEET has the potential to evolve and to support re-entry to Earth, for missions such as Mars Sample Return.The primary goal of the HEEET Project was to develop an ablative TPS heat-shield based on woven TPS technology to Technology Readiness Level (TRL) 6. Key evidence to support the TRL evaluation includes: Demonstration of reproducible manufacturing of a dual layer material over a range of thicknesses and integrated on to a heatshield engineering test unit at a scale that is applicable to near term Discovery as the highest priority and future NF missions as secondary priority set of missions. Demonstration of predictable and stable performance of the dual layer TPS over a range of entry environments that are applicable to near term Discovery and NF missions of interest to SMD.Includes completion of coupon arc jet and laser testing and development of a mid-fidelity thermal response model that correlates with test results. Demonstration of flight heatshield system design for a range of sizes and loads that are relevant to near term Discovery and NF missions of interest to SMD. Includes completion of structural testing to validate analytic thermal/structural models and development of a material property database. Includes structural testing of a ~1m Engineering Test Unit under relevant entry loads.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN70346 , International Planetary Probe Workshop (IPPW) 2019; Jul 08, 2019 - Jul 12, 2019; Oxford; United Kingdom
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    CFD Simulations of the IHF Arc-Jet Flow: 9-Inch Nozzle, Flow Surveys, LEAF Wedge Calibration Data (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-03
    Description: This paper reports computational analyses and flow characterization studies in a high enthalpy arc-jet facility at NASA Ames Research Center. These tests were conducted using a wedge model placed in a free jet downstream of new 9-inch diameter conical nozzle in the Ames 60-MW Interaction Heating Facility. Both the nozzle and wedge model were specifically designed for testing in the new Laser-Enhanced Arc-jet Facility. Data were obtained using stagnation calorimeters and wedge models placed downstream of the nozzle exit. Two instrumented wedge calibration plates were used: one water-cooled and the other RCG-coated tile plate. Experimental surveys of arc-jet test flow with pitot and heat flux probes were also performed at three arc-heater conditions, providing assessment of the flow uniformity and valuable data for the flow characterization. The present analysis comprises computational fluid dynamics simulations of the nonequilibrium flowfield in the facility nozzle and test box, including the models tested, and comparisons with the experimental measurements. By taking into account nonuniform total enthalpy and mass flux profiles at the nozzle inlet as well as the expansion waves emanating from the nozzle exit and their effects on the model flowfields, these simulations approximately reproduce the probe survey data and predict the wedge model surface pressure and heat flux measurements.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN68962 , AIAA & ASME Joint Thermophysics and Heat Transfer Conference; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    Two-Phase Convection Heat Transfer Correlations for Liquid Hydrogen Pipe Chilldown (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-21
    Description: Recently, heat transfer correlations based on liquid nitrogen (LN2) and liquid hydrogen (LH2) pipe quenching data were developed to improve the predictive accuracy of lumped node codes like SINDA/FLUINT and the Generalized Fluid System Simulation Program (GFSSP). After implementing these correlations into both programs, updated model runs showed strong improvement in LN2 pipe chilldown modeling but only modest improvement in LH2 modeling. Due to large differences in thermal and fluid properties between the two fluids, results indicated a need to develop a separate set of LH2-only correlations to improve the accuracy of the simulations. This paper presents a new set of two-phase convection heat transfer correlations based on LH2 pipe quenching data. A correlation to predict the bulk vapor temperature was developed after analysis showed that high amounts of thermal nonequilibrium of the liquid and vapor phases occurred during film boiling of LH2. Implemented in a numerical model, the new correlations achieve a mean absolute error of 19.5 K in the predicted wall temperature when compared to recent LH2 pipe chilldown data, an improvement of 40% over recent GFSSP predictions. This correlation set can be implemented in simulations of the transient LH2 chilldown process. Such simulations are useful for predicting the chilldown time and boil-off mass of LH2 for applications such as the transfer of LH2 from a ground storage tank to the rocket vehicle propellant tank, or through a rocket engine feedline during engine startup.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN70773 , 2019 Space Cryogenics Workshop; Jul 17, 2019 - Jul 19, 2019; Southbury, CT; United States
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    PIV and Rotational Raman-Based Temperature Measurements for CFD Validation of a Perforated Plate Cooling Flow: Part I (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-21
    Description: Film cooling is used in a wide variety of engineering applications for protection of surfaces from hot or combusting gases. The design of more efficient film cooling geometries/configurations could be facilitated by an ability to accurately model and predict the effectiveness of current designs using computational fluid dynamics (CFD) code predictions. Hence, a benchmark set of flow field property data were obtained for use in assessing current CFD capabilities and for development of better modeling approaches for these turbulent flow fields where accurate calculation of turbulent heat flux is important. Both Particle Image Velocimetry (PIV) and spontaneous rotational Raman scattering (SRS) spectroscopy were used to acquire high quality, spatially-resolved measurements of the mean velocity, turbulence intensity as well as the mean temperature and root mean square (rms) temperatures in a film cooling flow field. In addition to off-body flow field measurements, infrared thermography (IR) and thermocouple measurements on the plate surface enabled estimates of the film effectiveness. Raman spectra in air were obtained across a matrix of axial locations downstream from a 68.07 mm square nozzle blowing heated air over a range of temperatures (up to TR = 2.7) and Mach numbers (up to M0.9), across a 30.48 cm long plate equipped with three patches of 45 small (~1 mm) diameter cooling holes arranged in a staggered configuration. In addition, both centerline streamwise 2-component PIV and cross-stream 3-component Stereo PIV data at 14 axial stations were collected in the same flows. Only a subset of the data collected in the test program is included in this Part I report and are available from the NASA STI office. The final portion of the data will be published in a future report, Part II, along with CFD predictions of the complex cooling film flow.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220227/PART1 , GRC-E-DAA-TN69722 , E-19711
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    Mars Sample Retrieval Lander: Aerothermal Feasibility Analysis and Shape Optimization on the Use of ADEPT (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: This summer internship is focused on using CFD and fluid mechanics to optimize the SRL-ADEPT geometry in an attempt to increase drag and area-effectiveness, and reduce flow separation.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN72164
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    Reconstruction of Schiaparelli and Comars Flight Data (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: ESA recently flew an entry, descent, and landing demonstrator module called Schiaparelli that entered the atmosphere of Mars on the 19th of October, 2016. The instrumentation suite included heatshield and backshell pressure transducers and thermocouples (known as AMELIA) and backshell radiation and direct heatflux-sensing sensors (known as COMARS and ICOTOM). Due to the failed landing of Schiaparelli, only a subset of the flight data was transmitted before and after plasma black-out. The goal of this paper is to present comparisons of the flight data with calculations from NASA simulation tools, DPLR/NEQAIR and LAURA/HARA. DPLR and LAURA are used to calculate the flowfield around the vehicle and surface properties, such as pressure and convective heating. The flowfield data are passed to NEQAIR and HARA to calculate the radiative heat flux. Comparisons will be made to the COMARS total heat flux, radiative heat flux and pressure measurements. Results will also be shown against the reconstructed heat flux which was calculated from an inverse analysis of the AMELIA thermocouple data performed by Astrium. Preliminary calculations are presented in this abstract. The aerodynamics of the vehicle and certain as yet unexplained features of the inverse analysis and forebody data will be investigated.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN65889 , International Planetary Probe Workshop (IPPW); Jul 08, 2019 - Jul 12, 2019; Oxford; United Kingdom
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    Aerodynamic and Aerothermal Simulations of Mars Concept Vehicles Using Overset DPLR (2019)
    In:  CASI
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    Publication Date: 2019-08-29
    Description: NASA's Descent System Studies (DSS) Program is studying various concept vehicles to enable landing of heavy payloads on the surface of Mars. While it is desirable to run high-fidelity CFD simulations to accurately assess the aerodynamic and aerothermal effects of various design changes during EDL, it is usually difficult to quickly generate high-quality grids suitable for such analyses. One approach to address this bottleneck in mesh generation is through the use oversetting grids. Although the overset approach is efficient and powerful in solving partial differential equations on complex geometries, new users often find it challenging to apply overset concepts for their simulations. For example, generating hyperbolic grids with sufficient overlap; priority in hole-cutting on multiple overlapping grids; and fixes to assemble overlapping viscous grids at the body surface. The objective of this presentation is to introduce a simple process that combines the advantages of near-body, point-matched, structured grids with oversetting background grids suitable for grid alignment. This approach allows for grids that can be sequenced, reclustering of mesh spacing at the wall, and grid alignment with the bow shock. The current methodology is tested on a Mid-L/D configuration using the overset DPLR code.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN72528 , Thermal & Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Hampton, VA; United States
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    Interface Conductance Under a Real Electronics Box (2019)
    In:  CASI
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    Publication Date: 2019-08-30
    Description: Electronics Boxes with high heat dissipations use a thermal interface material to increase heat transfer to the radiator in a vacuum/space environment. There are lots of materials to choose from, but for Spacecraft applications, there are more than high heat transfer metrics which must be met. Contamination (both particle generation and outgassing), ease of cutting, and removal are just as important metrics in material selection. However, vendor data of material thermal conductance is usually based on a 1" X 1" piece of material under high uniform pressures. Large Electronics boxes almost never have optimal pressures, as they are bolted along the perimeter and leave gaps in the center regions. In order to characterize the relative thermal conductance for large Electronics boxes, an 8" X 8" plate was fabricated to simulate an electronics box bottom and bolted around the perimeter to a cold plate. Various thermal interface materials were inserted between the box and cold plate, and overall thermal conductance's were calculated. A table was generated which compares the full gamut of thermal interface materials for large boxes, from a dry joint to a wet joint. Materials were placed in order of high to low conductance's, so an engineer can compare the benefit of each material in a real-world scenario.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GSFC-E-DAA-TN70827 , Thermal and Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Hampton, VA; United States
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    The Intermediate Wake of a Thick Flat Plate with a Circular Trailing Edge (2019)
    In:  CASI
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    Publication Date: 2019-08-30
    Description: The intermediate wake region of a thick flat plate with a circular trailing edge (TE) is investigated with a direct numerical simulation (DNS). The upper and lower separating boundary layers are both turbulent and are statistically identical; the resulting wake is symmetric in the mean. Earlier research dealt with the near/very-near wake of the same plate (x/D 〈 13.0, x is the streamwise distance from the center of the circular TE and D is the plate-thickness/TE-diameter). In the present investigation the emphasis is on the evolution of shed-vortex structure and turbulence intensity distributions with increasing x; the focus is on the region 20.0 〈 x/D 〈 40.0. Profile similarity in wake velocity statistics is explored.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220338 , ARC-E-DAA-TN72722
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    The International Space Station (ISS) Port 1 (P1) External Active Thermal Control System (EATCS) Ammonia Leak (2019)
    In:  CASI
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    Publication Date: 2019-08-31
    Description: Ammonia is used in the Starboard 1 (S1) and Port 1 (P1) External Active Thermal Control System (EATCS) to cool the pressurized modules, and some of the external electrical power distribution hardware. Leaks that develop in these critical cooling systems that deplete in-line tanks can ultimately result in loss of cooling, which can have devastating impacts to the mission, science and crew onboard the ISS. A slow ammonia leak was initially observed from the P1 EATCS in 2011, but later in 2013 the leak rate began to accelerate. The ammonia inventory eventually began to decay exponentially, raising concerns that the inventory could drop to levels where the system would not be operational.The Robotic External Leak Locator (RELL) was built and launched to the ISS to detect and help locate ammonia leaks using the ISS Robotic Arm and remote ground operator control without constant crew involvement. RELL pinpointed the ammonia leak to the two flexible jumper hose assemblies connecting one of two fluid loops in one of the three deployable radiators to the P1 EATCS. The ammonia inside the two hose assemblies and that radiator fluid loop was isolated and vented to space in 2017. This stopped the leak and an Extravehicular Activity was conducted to remove the two hose assemblies so they could be returned to ground for further Test, Teardown and Evaluation (TT&E). The purpose of this presentation is to discuss this leakage scenario and the TT&E efforts.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: JSC-E-DAA-TN70723 , 2019 Thermal and Fluids Analysis Workshop; Aug 26, 2019 - Aug 30, 2019; Newport News, VA; United States
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    Testing of Heat Flux Sensors at Cryogenic Temperatures (2019)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: Normally, in order to characterize multilayer insulation installed onto a test tank, the boil-off of the tank is measured and then heat loads from structural and fluid penetrations are calculated from temperature measurements throughout the system. For the Structural Heat Intercept, Insulation, and Vibration Evaluation Rig testing, it was determined that this approach would have significant uncertainties (over 50%) and that another method was needed to characterize the heat load through the blanket. Heat flux sensors are widely used to measure heat loads and characterize insulation systems at room temperature, however, the heat fluxes measured are usually two orders of magnitude higher than high performance MLI. Three different heat flux sensors were initially checked out on a liquid hydrogen calorimeter. One was chosen for actual implementation and 20 sensors were ordered. Of those sensors, calibration was attempted on 7 of the sensors. The results from testing and calibration are discussed.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN70640 , Cryogenic Engineering Conference; Jul 21, 2019 - Jul 25, 2019; Hartford, CT; United States
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    Entropy Stable Method for the Euler Equations Revisited: Central Differencing via Entropy Splitting and SBP (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-14
    Description: The two decades old high order central differencing via entropy splitting and summation-by-parts (SBP) difference boundary closure of Ols- son & Oliger (1994), Gerritsen & Olsson (1996), and Yee et al. (2000) is revisited. The entropy splitting is a form of skew-symmetric splitting of the nonlinear Euler flux derivatives. Central differencing applied to the entropy splitting form of the Euler flux derivatives together with SBP difference operators will, hereafter, be referred to as entropy split schemes. This study is prompted by the recent growing interest in numerical methods for which a discrete entropy conservation law holds, a discrete global entropy conservation can be proved and/or the numerical method possesses a stable entropy in the framework of SBP difference operators and L2-energy norm estimate. The objective of this paper is to recast the entropy split scheme as the re- cent definition of an entropy stable method for central differencing with SBP operators for both periodic and non-periodic boundary conditions for non- linear Euler equations. Standard high order spatial central differencing as well as high order central spatial DRP (dispersion relation preserving) spatial differencing is part of the entropy stable methodology framework. Long time integration of 2D and 3D test cases is included to show the comparison of this efficient entropy stable method with the Tadmor-type of entropy conservative methods. Studies also include the comparison among the three skew-symmetric splittings on their nonlinear stability and accuracy performance without added numerical dissipations for smooth flows. These are, namely, entropy splitting, Ducros et al. splitting and the Kennedy & Grub- ber splitting.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN71641 , International Conference on Numerical Modeling of Space Plasma Flows (ASTRONUM); Jul 01, 2019 - Jul 05, 2019; Paris; France
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    Thermal Development of a COTS Camera for Exploration Upper Stage (EUS) (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-06
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: M19-7573-2 , Thermal and Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Newport News, VA; United States
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    Numerical Modeling of Boiling in a Heated Tube (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-06
    Description: This paper presents numerical models of boiling in a heated tube using the Generalized Fluid System Simulation Program (GFSSP), a finite-volume-based general-purpose flow network code developed at NASA/Marshall Space Flight Center. The heated tube is discretized into a one-dimensional array of nodes and branches to represent the flow of liquid and vapor in a tube with a prescribed pressure differential. The solid wall is also discretized into solid nodes and conductors to allow for heat transfer between the wall and the fluid. The conservation equations of mass, momentum, and energy of the fluid are solved simultaneously with the energy conservation equation for the solid wall. Two experimental configurations of fluid flowing in a vertical tube have been simulated, one with water and the other with liquid hydrogen. This paper compares experimental data with numerical predictions based on four different published correlations for boiling heat transfer coefficients. Three of these correlations are applicable to the saturated vertical flow conditions of the experiments. One of them is applicable to film boiling and has been used for the liquid hydrogen experiment, which was in film boiling regime. For the case of boiling water, the predictions of wall temperatures using the boiling heat transfer correlations agreed well with the experimental results. However, in the case of boiling hydrogen larger discrepancies were observed between the experimental data and numerical predictions.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: M19-7514 , Space Cryogenic Workshop; Jul 17, 2019 - Jul 19, 2019; Southbury, CT; United States
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    Fluid Transient Analysis of Propellant Feedlines during a Priming Event (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-07
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: M19-7565 , Thermal & Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Hampton, VA; United States
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    Free-Flight CFD Simulations of Ballistic Range and Flight Tests (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-09
    Description: Free-Flight CFD capability has been implemented into the finite-volume solver US3D under the Entry Systems Modeling project. Several simulations of ballistic range experiments have been performed in order to validate the simulation software and methodology. Extension of the software to flight scale trajectories with varying freestream conditions has been carried out. Results show promising ability to predict vehicle behavior as compared to flight. Finally, a multi-body free-flight capability has been developed to generalize the single-body free-flight solver to study multiple bodies in proximal flight.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN73924 , International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions and Engineering (FAR); Sep 30, 2019 - Oct 03, 2019; Monopoli; United States
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    Thermal Development of a Commercial off the Shelf (COTS) Camera for Exploration Upper Stage (EUS) (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-06
    Description: NASAs Flight Imagery Launch Monitoring Real-time System (FILMRS) cameras were originally developed for the Space Launch System (SLS) Core Stage. These Commercial Off the Shelf (COTS) cameras have been redesigned and reduced by an order of magnitude in size for the Exploration Upper Stage (EUS). The change in thermal environment has led to the application of various passive thermal control methods and the addition of a heater option. This paper will give a summary of the design and development test effort associated with adapting the COTS camera for the demands of the space environment and associated thermal mitigations applied as the project prepares to complete the design. The application of this camera for other space systems is discussed.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: M19-7573-1 , Thermal and Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Newport News, VA; United States
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    Active Flow Control on Vertical Tail Models (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-06
    Description: Active flow control (AFC) subscale experiments were conducted at the Lucas Wind Tunnel of the California Institute of Technology. Tests were performed on a generic vertical tail model at low speeds. Fluidic oscillators were used at the trailing edge of the main element (vertical stabilizer) to redirect the flow over the rudder and delay or prevent flow separation. Side force increases in excess of 50% were achieved with a 2% momentum coefficient (C(sub )) input. The results indicated that a collective C(sub ) of about 1% could increase the side force by 3050%. This result is achieved by reducing the spanwise flow on the swept back wings that contributes to early flow separation near their tips. These experiments provided the technical backdrop to test the full-scale Boeing 757 vertical tail model equipped with a fluidic oscillator system at the National Full-scale Aerodynamics Complex 40-by 80-foot Wind Tunnel, NASA Ames Research Center. The C(sub ) is shown to be an important parameter for scaling a fluidic oscillator AFC system from subscale to full-scale wind tunnel tests. The results of these tests provided the required rationale to use a fluidic oscillator AFC configuration for a follow-on flight test on the Boeing 757 ecoDemonstrator.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NF1676L-29550 , AIAA Journal (ISSN 0001-1452) (e-ISSN 1533-385X); 57; 8; 3322-3338
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    Plant Water Management (PWM) Experiment (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-11
    Description: Plant Water Management is a technology demonstration of recent advances in micro-g capillary fluidics research applied to plant growth systems. It has applications in long-term food production systems for missions to the Moon and Mars, as well as the immediate need for ISS food supplements to the crew diet. PWM will demonstrate the low-gravity role of surface tension, wetting, and system geometry to effectively replace the role of gravity in certain terrestrial plant growth systems.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN73325 , Joint CSA/ESA/JAXA/NASA Increments 61 and 62 Science Symposium; Sep 17, 2019 - Sep 19, 2019; Telecon
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    Time Accurate Simulation of Nonequilibrium Flow inside the NASA Ames Electric Arc Shock Tube (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-06
    Description: Numerical investigations of the ow field inside NASA Ames' Electric Arc Shock Tube have been performed. The focus is to simulate the experiments designed to reproduce shock layer radiation layer relevant to Earth re-entry conditions. This paper assess the current computational capability in simulating unsteady nonequilibrium flows in the presence of strong shock waves with state-of-the-art physical models. The technical approach is described with preliminary results presented for one specific ow condition. The numerical problems encountered during the computation of these flows are detailed, along with the methods used to resolve them. Post-shock conditions are discussed and compared to CEA equilibrium prediction.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN64117 , AIAA SciTech Forum; Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Numerical Simulation on Liquid Hydrogen Chill-Down Process of Vertical Pipeline (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-06
    Description: In order to improve the cryogenic propellant management technologies for a liquid hydrogen rocket with high specific impulse, JAXA, the University of Tokyo, and the NASA Glenn Research Center have jointly organized a multi-agency model validation collaboration project. As part of this project, JAXA's boiling simulation was validated with NASA's experimental data on vertical pipeline chill-down. Simulation results were in good agreement with the experimental data obtained using an improved boiling model to reproduce the spray flow. This activity achieved liquid hydrogen turbo-pump simulation at JAXA for grasping the boiling flow phenomenon from engine cut-off to re-ignition. This joint research resulted in an international cooperative relationship for discussing the cryogenic propellant management technologies necessary to develop next-generation liquid rockets.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN71160 , AIAA Propulsion and Energy Forum; Aug 19, 2019 - Aug 22, 2019; Indianapolis, IN; United States
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    Operation of a Heat Pipe with Multiple Heat Loads Under Reflux Mode (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-14
    Description: "Heat pipes are being used on many spacecraft to acquire heat dissipated by the payload and transport the heat to a remote radiator. In instrument-level or spacecraft-level ground testing, many heat pipes are placed in a gravity-driven reflux mode where the condenser is well above the evaporator, resulting in the formation of a liquid pool at the bottom of the heat pipe. If a head load is applied to a site that is in contact with the liquid pool, the generated vapor will flow upward to the condenser and the condensate will fall back to the evaporator due the influence of gravity. Hence, the heat pipe can operate steadily under reflux mode because the heated site always has sufficient liquid supply to sustain the fluid flow. In contrast, when a heat load is applied to a site remote from the liquid pool, the heat pipe will be unable to transfer heat through liquid evaporation unless the heated site has a chance to be in contact with liquid. This can be accomplished by applying an additional heat load to the liquid pool to establish a reflux flow so that the remote site can capture the falling condensate. An experimental investigation was conducted to study the effect of gravity on the thermal performance of a heat pipe under reflux mode with multiple heat loads. An aluminum ammonia heat pipe with internal axial grooves was placed in a vertical position. Cooling was provided to the top of the heat pipe, and heat was applied to three sites below the condenser with various heat distributions. One of the heated sites was above the liquid pool, and two were in direct contact with the liquid pool. Test results showed that when a heat load was applied to either one or both of the lower sites, the heat pipe could run steadily under reflux mode. After a reflux flow had been established, a heat load could be applied to the upper site. If the upper site could capture sufficient liquid falling from the condenser to handle its heat load solely by liquid evaporation, the heat pipe could reach steady operation. Otherwise, the temperature of the upper site would oscillate due to its intermittent contact with the falling liquid. For a given heat load to the upper site, the amplitude of temperature oscillation decreased with an increasing heat load to the lower sites because there was more falling condensate available for the upper site to capture. Moreover, the temperature oscillation disappeared completely when the total heat loads to lower sites exceeded a threshold power, and the threshold power increased with an increasing heat load to the upper site."
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GSFC-E-DAA-TN71130 , International Mechanical Engineering Congress & Exposition (IMECE); Nov 08, 2019 - Nov 14, 2019; Salt Lake City, UT; United States
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    NEQAIR v15.0 Release Notes: Nonequilibrium and Equilibrium Radiative Transport and Spectra Program (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-13
    Description: NEQAIR v15.0 provides the first steps to improved coupling between NEQAIR and the DPLR CFD code, which will be fully realized in v15.1. The plan is to release NEQAIR v15.1 and DPLR 4.05 at the same time. The improvements implemented in NEQAIR v15.0 have focused on improving stability, solution robustness, usability and providing different options for running the code. It is also the first version of the code to have a new input file and line of sight format since 2009. Backward compatibility with previous formats of the input files (neqair.inp and LOS.dat) has also been provided. NEQAIR v15.0 supersedes the prerelease of this version, as well as NEQAIR v14.0, v13.2, v13.1 and the suite of NEQAIR2009 versions. These updates have predominantly been performed by Brett Cruden and Aaron Brandis from AMA Inc at NASA Ames Research Center between 2016 and 2018. NEQAIR v15.0 is a standalone software tool for line-by-line spectral computation of radiative intensities and/or radiative heat flux, with one-dimensional transport of radiation. In order to accomplish this, NEQAIR v15.0, as in previous versions, requires the specification of distances (in cm), temperatures (in K) and number densities (in parts/cc) of constituent species along lines of sight. Therefore, it is assumed that flow quantities have been extracted from flow fields computed using other tools, such as CFD codes like DPLR or LAURA, and that lines of sight have been constructed and written out in the format required by NEQAIR v15.0. There are two principal modes for running NEQAIR v15.0. In the first mode NEQAIR v15.0 is used as a tool for creating synthetic spectra of any desired resolution (including convolution with a specified instrument/slit function). The first mode is typically exercised in simulating/interpreting spectroscopic measurements of different sources (e.g. shock tube data, plasma torches, etc.). In the second mode, NEQAIR v15.0 is used as a radiative heat flux prediction tool for flight projects. Correspondingly, NEQAIR has also been used to simulate the radiance measured on previous flight missions. This report summarizes the database updates, corrections that have been made to the code, changes to input files, parallelization, the current usage recommendations, including test cases, and an indication of the performance enhancements achieved.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN72963
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    Multi-Scale Modeling of Low-Density Carbon-Phenolic Ablators (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-09
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN65782 , Von Karman Institute for Fluid Dynamics (VKI) Lecture Series: Series on Pyrolysis Phenomena in Porous Media ; Apr 01, 2019 - Apr 04, 2019; Brussels; Belgium
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    Fully-Coupled Fluid-Structure Interaction Simulations of a Supersonic Parachute (2019)
    In:  CASI
    Details
    Publication Date: 2019-10-29
    Description: A validated computational fluid-structure interaction method for simulating the complex interaction between the large deformation of very thin, highly deformable structures and compressible flows is extended to consider large-scale problems in supersonic flows using parallel computing. The coupled fluid-structure interaction system is solved in a partitioned, or weakly-coupled, manner. The foundations of the applied fluid-structure interaction method are a higher-order, block-structured Cartesian, sharp immersed boundary method for the compressible Navier-Stokes equations and a computational structural dynamics solver employing a geometrically nonlinear 3-node shell element based on the mixed interpolation of tensorial components formulation. The method is applied to large deformation fluid-structure interaction validation cases before being applied to the inflation of a supersonic parachute in the upper Martian atmosphere where the goal is to demonstrate the capabilities of the solver when considering large-scale problems in supersonic flows.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN69971 , AIAA Aviation 2019; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    Determination of Aerothermal Environment and Ablator Material Response Using Inverse Methods (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-18
    Description: The Mars Science Laboratory (MSL) was protected during entry into the Martian atmosphere by a thermal protection system that used NASAs Phenolic Impregnated Carbon Ablator (PICA). The heat shield of the probe was instrumented with the Mars Entry Descent and Landing Instrument (MEDLI) suite of sensors. MEDLI Integrated Sensor Plugs (MISP) included thermocouples that measured in-depth temperatures at various locations on the heatshield. The flight data has been used as a benchmark for validating ablation codes within NASA. This work seeks to refine the estimate of the material properties for the MSL heat shield and the aerothermal environment during Mars entry using estimation methods in DAKOTA on the temperature data obtained from MEDLI.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN73346 , Ablation Workshop; Sep 16, 2019 - Sep 17, 2019; Minneapolis, MN; United States
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    Flutter-Enhanced Mixing: Flow-Induced Flutter of Flexible Membranes in Small Scale Mixers (2019)
    In:  CASI
    Details
    Publication Date: 2020-01-04
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: M19-7790_Presentation , APS Fluids Conference; Nov 23, 2019 - Nov 26, 2019; Seattle, WA; United States
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    Coupling Free Flight CFD and Trajectory with US3D (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN72260 , Research Group Presentation; Aug 20, 2019; Atlanta, GA; United States
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    Gravity Effects in Two-Phase Microgap Flow (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-09
    Description: The high power density of emerging electronic devices is driving the transition from remote cooling, which relies on conduction and spreading, to embedded cooling, which extracts dissipated heat on-site. Two-phase microgap coolers employ the forced flow of dielectric fluids undergoing phase change in a heated channel within or between devices. Such coolers must work reliably in all orientations for a variety of applications (e.g., vehicle-based equipment), as well as in microgravity and high-g for aerospace applications, but the lack of acceptable models and correlations for orientation- and gravity-independent operation has limited their use. Reliable criteria for achieving orientation- and gravity-independent flow boiling would enable emerging systems to exploit this thermal management technique and streamline the technology development process. As a first step toward understanding the effect of gravity in two-phase microgap flow and transport, in an earlier effort, the authors studied the effects of evaporator orientation, mass flux, and heat flux on flow boiling of HFE7100 in a 1.01 mm tall by 13.0 mm wide by 12.7 mm long microgap channel. Orientation-independence, defined as achieving similar critical heat fluxes, heat transfer coefficients, and flow regimes across orientations, was achieved for mass fluxes of 400 kg/sq.m-s and greater (corresponding to a Froude number of about 0.8). In the present effort, the authors have studied the effects of gravity, mass flux, and subcooling on flow boiling of HFE7100 in a 0.17 mm tall by 13.0 mm wide by 12.7 mm long microgap channel. The Flow Boiling in Microgap Coolers payload experienced about three minutes of weightlessness and shorter periods of high-g (up to about 5 g) during two recent flights aboard the Blue Origin New Shepard reusable launch vehicle. The results from the flight experiments will be presented and compared with published criteria for achieving gravity-independence.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GSFC-E-DAA-TN73788 , International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems (InterPACK); Oct 07, 2019 - Oct 09, 2019; Anaheim, CA; United States
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    Infrared Measurements of Forward Heat Conduction during Simulated Microgravity Flame Spread in the Narrow Channel Apparatus (2019)
    In:  CASI
    Details
    Publication Date: 2019-12-11
    Description: An infrared (IR) camera provides a way of examining temperature trends associated with simulated microgravity flame spread in the Narrow Channel Apparatus (NCA). The IR camera measures the surface temperature of solid poly methyl methacrylate (PMMA) fuel. These tests examine the forward conduction of heat ahead of the flame front in the non-thermally thin fuel.The NCA is a combustion wind tunnel that simulates a microgravity flame spread environment by employing a narrow gap between the fuel and ceiling of the device, limiting the effects of buoyancy. Test conditions of a 5 mm gap, mean opposed flow velocity of 15 cm/s, and fuel thickness of 3 mm are used.PMMA is selected as the fuel due to repeatability of test results, ease of computational modeling, and known combustion mechanics. Using specific lens and bandpass filter combinations the PMMA can be imaged as effectively opaque. The spectral emissivity for PMMA was calculated and incorporated into the calibration of the camera.Surface temperatures from the IR camera are compared to results from thermocouples embedded in the surface of the fuel. The IR camera results show that nontrivial forward conduction occurs during tests, and therefore must be included in computational models of the process.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GRC-E-DAA-TN75460 , 2019 WSSCI Fall Technical Meeting; Oct 14, 2019 - Oct 15, 2019; Albuquerque, NM; United States
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    Efficient Near-Field to Mid-Field Sonic Boom Propagation Using a High-Order Space Marching Method (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An efficient strategy for propagating sonic boom signatures from a near-field Computational Fluid Dynamics (CFD) solution to the mid-field is presented. The method is based on a high-order accurate finite-difference discretization of the 3D Euler equations on a specially designed curvilinear grid and a single sweep space marching solution algorithm. The new approach leads to more than a factor of two reduction in overall computational resources compared to the current method used to propagate near-field sonic booms to the ground. Accuracy and efficiency of the near-field to mid-field process is demonstrated using a selection of test cases from the AIAA Sonic Boom Prediction Workshops. Azimuthal dependence of nonlinear wave propagation from the near-field to mid-field is analyzed along with its effects on the ground level noise.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN69561 , AIAA Aviation 2019; Jun 17, 2019 - Jun 20, 2019; Dallas, TX; United States
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    Shock Tube Measurements of Radiative Heating for Titan and Nitrogen (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Detailed spectrally and spatially resolved radiance has been measured in the Electric Arc Shock Tube at NASA Ames Research Center for conditions relevant to Titan entry, with varying atmospheric composition, free-stream density (equivalently, altitude) and shock velocity. The test campaign measured radiation at velocities from 4.7 km/s to 8 km/s and free-stream pressures of 0.1, 0.28 and 0.47 Torr with a variety of compositions. Radiances measured in this work are substantially larger compared to that reported both in past EAST test campaigns and in other shock tube facilities. Depending on the metric used for comparison, the discrepancy can be as high as an order of magnitude. Due to the difference with previously reported data, a substantial effort was undertaken to provide confidence in the new results. The present work provides a new benchmark set of data to replace those published in previous studies. The effect of gas impurities identified in previous shock tube studies was also examined by testing in pure N2 and deliberate addition of air to the CH4/N2 mixtures. Furthermore, a test campaign in pure N2 was also conducted with the aim of providing data for improving fundamental understanding of high enthalpy flows containing N2, such as high-speed entries into Earth or Titan. These experiments cover conditions from approximately 6 km/s to 11 km/s at an initial pressure of 0.2 Torr. It is the intention of this paper to motivate code comparisons benchmarked against this data set.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN61964 , International Workshop on Radiation of High Temperature Gases in Atmospheric Entry; Mar 25, 2019 - Mar 29, 2019; Madrid; Spain
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    Improvements to an Explicit Algebraic Stress Model for Turbulent Jet Mixing Predictions (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Modifications to key coefficients in a k E based explicit algebraic stress model (EASM) are examined with the objective of improving the prediction of turbulent jet flows. The pressure strain coefficient, C2 and the turbulent diffusion coefficients, k and E were investigated. For a series of benchmark subsonic jets at heated and unheated conditions, lowering C2 from the default value of 0.36 to 0.10 resulted in a significant improvement in the jet mixing, when compared to experimental data. Changing k and E from default values of 1.00 and 1.4489, respectively, to 0.50 and 0.7244, respectively, improved the initial mixing rate, while reducing the farfield mixing rate and the peak turbulent kinetic energy along the centerline. A high-speed mixing layer was also investigated for performance of baseline and modified EASM coefficients, with similar results as for the jet cases. A flat plate boundary layer was briefly examined to determine the effects of changing the coefficients on the turbulent skin friction coefficient. The change to the pressure strain coefficient, C2 = 0.10 is recommended for future EASM calculation of jets flow; however, it is also recommended that the diffusion coefficients remain at their default values.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM—2019-219978 , AIAA Paper 2019–0325 , E-19661 , GRC-E-DAA-TN65223 , 2019 Science and Technology Forum (SciTech); Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    Evaluation of Full Reynolds Stress Turbulence Models in FUN3D for Axisymmetric Jet Flow (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Two full seven-equation turbulence models available in the FUN3D code are evaluated for their ability to improve the computation of challenging mixing flows encountered in aerospace propulsion. These models are the SSG/LRR and Wilcox full second-moment Reynolds stress models. They solve equations for the six components of the Reynolds stress and a seventh equation for the turbulent length scale. Two standard eddy viscosity models are also evaluated for comparison, the Spalart-Allmaras (SA) one-equation model and the Menter Shear Stress Transport (SST-V) two-equation turbulence model. Flow through an axisymmetric reference nozzle is examined at three flow conditions: subsonic unheated, subsonic heated, and near sonic unheated. Centerline profiles of velocity and turbulent kinetic energy and radial profiles of velocity, turbulent kinetic energy and turbulent stresses are examined. Results showed that the SA model did well at predicting the jet potential core length, but over-mixed the downstream flow, whereas the SST-V model over-predicted the potential core length. The Wilcox-model significantly over-predicted the potential core length and under-predicted the mixing and was not well-suited for the jet flows evaluated, however the SSG/LRR Reynolds stress model did well at predicting the mixing rate and mean velocity for all cases examined.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM—2019-220067 , AIAA Paper 2019–2332 , E-19657 , GRC-E-DAA-TN64966 , 2019 Science and Technology Forum (SciTech); Jan 07, 2019 - Jan 11, 2019; San Diego, CA; United States
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    PIV and Rotational Raman-Based Temperature Measurements for CFD Validation of a Perforated Plate Cooling Flow: Part 1 (2019)
    In:  Other Sources
    Details
    Publication Date: 2019-09-17
    Description: Film cooling is used in a wide variety of engineering applications for protection of surfaces from hot or combusting gases. The design of more efficient film cooling geometries/configurations could be facilitated by an ability to accurately model and predict the effectiveness of current designs using computational fluid dynamics (CFD) code predictions. Hence, a benchmark set of flow field property data were obtained for use in assessing current CFD capabilities and for development of better modeling approaches for these turbulent flow fields where accurate calculation of turbulent heat flux is important. Both Particle Image Velocimetry (PIV) and spontaneous rotational Raman scattering (SRS) spectroscopy were used to acquire high quality, spatially-resolved measurements of the mean velocity, turbulence intensity as well as the mean temperature and root mean square (rms) temperatures in a film cooling flow field. In addition to off-body flow field measurements, infrared thermography (IR) and thermocouple measurements on the plate surface enabled estimates of the film effectiveness. Raman spectra in air were obtained across a matrix of axial locations downstream from a 68.07 mm square nozzle blowing heated air over a range of temperatures (up to TR = 2.7) and Mach numbers (up to M0.9), across a 30.48 cm long plate equipped with three patches of 45 small (~1 mm) diameter cooling holes arranged in a staggered configuration. In addition, both centerline streamwise 2-component PIV and cross-stream 3-component Stereo PIV data at 14 axial stations were collected in the same flows. Only a subset of the data collected in the test program is included in this Part I report and are available from the NASA STI office. The final portion of the data will be published in a future report, Part II, along with CFD predictions of the complex cooling film flow.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/TM-2019-220227/PART1/SUPP , E-19711 , GRC-E-DAA-TN69722
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    Entropy Stable Method for the Euler Equations Revisited: Central Differencing via Entropy Splitting and SBP (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-14
    Description: The two decades old high order central differencing via entropy splitting and summation-by-parts (SBP) difference boundary closure of Olsson & Oliger, Gerritsen & Olsson, and Yee et al. (15, 7, 37) is revisited. The objective of this paper is to prove for the first time that the entropy split scheme is an entropy stable method for central differencing with SBP operators for both periodic and non-periodic boundary conditions for nonlinear Euler equations. Standard high order spatial central differencing as well as high order central spatial DRP (dispersion relation preserving) spatial differencing is part of the entropy stable methodology framework. The proof is to replace the spatial derivatives by summation-by-parts (SBP) difference operators in the entropy split form of the equations using the physical entropy of the Euler equations. The numerical boundary closure follows directly from the SBP operator. No additional numerical boundary procedure is required. In contrast, Tadmor-type entropy conserving schemes (31) using mathematical entropies and more recently in (35], do not naturally come with a numerical boundary closure and a generalized SBP operator has to be developed (18). Long time integration of 2D and 3D test cases is included to show the comparison of this efficient entropy stable method with the Tadmor-type of entropy conservative methods. Studies also include the comparison among the three skew-symmetric splittings on their nonlinear stability and accuracy performance without added numerical dissipations for smooth flows. These are, namely, entropy splitting, Ducros et al. splitting and the Kennedy & Grubber splitting.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN71834 , U.S. National Congress on Computational Mechanics; Jul 28, 2019 - Aug 01, 2019; Austin, TX; United States
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    Simulation of HyMETS Flowfield Around Baby-SPRITE Entry Probe (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-12
    Description: Arc-jets are unique facilities used in research, development, and evaluation of high-temperature thermal protection systems for hypersonic vehicles and planetary entry systems. Thermochemical non-equilibrium computational fluid dynamics simulations have been carried out for the Hypersonic Materials Environmental Test System arc-jet facility to determine the size of a capsule model before arc-jet testing by better understanding of the physical phenomena. The results show the effect of the test article geometry and the importance of high-quality grids for accurate solutions. Accurate computational modeling of hypersonic flow fields inside arc-jets under simulated planetary entry conditions would help improve the design of thermal protection systems that may enable human exploration of the Moon, Mars, and beyond.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN69900 , AIAA AVIATION Forum 2019; Jun 17, 2019 - Jun 21, 2019; Dallas, TX; United States
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    Material Damage System and Method for Determining Same (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-26
    Description: A system and method for determining a change in a thickness and temperature of a surface of a material are disclosed herein. The system and the method are usable in a thermal protection system of a space vehicle, such as an aeroshell of a space vehicle. The system and method may incorporate micro electric sensors arranged in a ladder network and capacitor strip sensors. Corrosion or ablation causes a change in an electrical property of the sensors. An amount of or rate of the corrosion or the ablation and a temperature of the material is determined based on the change of the electrical property of the sensors.
    Keywords: Fluid Mechanics and Thermodynamics
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    Review of MLI Behavior at Low Temperatures and Application to L'Ralph Thermal Modeling (2019)
    In:  CASI
    Details
    Publication Date: 2019-09-21
    Description: In this presentation, the theory and application of multi-layer insulation (MLI) behavior, with a specific focus on lower temperature applications (〈180K), is discussed. Many parameters can affect the performance of MLI (i.e. construction method, size, materials, grounding, penetrations, etc.) and these factors can make the prediction of MLI performance a challenge. Often, MLI performance is measured in terms of estar, and analysts commonly apply bias between a high and a low estar value. However, this approach can be dangerous when a mission goes through a wide range of temperatures during its lifetime (such as our mission, L'Ralph) due to temperature dependence of estar, with estar values increasing exponential as temperatures get colder. Many research papers and correlations have been published about MLI behavior, showing how estar values can rapidly rise at low temperatures. These correlations also show how the different parameters of MLI can affect and amplify this growth. Various correlations are presented as well as how L'Ralph is approaching the MLI problem. L'Ralph thermal model is built with Thermal Desktop (TD), and a discussion of how to apply the temperature dependent MLI behavior within TD is included. The presentation also includes reviews of different methods of mitigating heat leaks through MLI, touching briefly on topics such as integrated-MLI (IMLI), Dacron vs silk netting, and using multi-layered meshes to improve estar performance.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: GSFC-E-DAA-TN70495 , Thermal & Fluids Analysis Workshop (TFAWS 2019); Aug 26, 2019 - Aug 30, 2019; Hampton, VA; United States
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    Gravity-Related Issues in Boiling and Condensation: JSC Perspective (2019)
    In:  CASI
    Details
    Publication Date: 2019-11-07
    Description: A discussion of the impact of gravity on boiling and condensation phenomena especially related to space flight and the concept of gravity independence.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: JSC-E-DAA-TN74235 , NASA SLPSRA Fluid Physics Workshop; Oct 16, 2019 - Oct 17, 2019; Cleveland, OH; United States
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    Aerothermal Analysis and Thermal Protection System (TPS) Design of the Mars Sample Retrieval Lander (SRL) Concept (2019)
    In:  CASI
    Details
    Publication Date: 2019-08-06
    Description: This poster provides a glimpse of the aerothermal analysis and TPS design work for the Mars Sample Retrieval Lander (SRL), part of the Mars Sample Return (MSR) architecture.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN70488 , International Planetary Probe Workshop 2019 (IPPW 2019); Jul 08, 2019 - Jul 12, 2019; Oxford; United Kingdom
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    Insights into the fragmentation of the Adria Plate (2018)
    Details
    Publication Date: 2020-11-30
    Description: This study gives an interpretation of the current tectonics and kinematics of the Adria Plate, a region mostly coinciding with Italy and its surroundings. We have examined the spatial distribution and kinematics of seismicity by using an updated dataset obtained integrating the available catalogues of earthquakes and focal mechanisms. Moreover, to highlight the distribution of seismicity and of the asso- ciated strain patterns, we have elaborated a seismic flux map of the Italian region, which is a map of the energy released per unit time and per unit area. Seismic flux represents the energy released and provides a synthetic and continuous view of areas with greater seismicity and associated strain patterns with respect to the plot of earthquakes only. The seismic data, and the results of some elaborations car- ried out using these datasets have been compared with the present-day state of stress and slip rates of the major active faults of some sectors of Italy, as well as with the horizontal kinematics highlighted by GPS observations. The distribution and kinematics of earthquakes and active faults, the seismic flux, and GPS velocities, suggest that the Adria Plate is currently behaving as an ensemble of independent blocks rather than as a unique rigid plate. The Adria Plate can be thus subdivided into three major blocks and a number of smaller blocks moving independently under the action of a first-order mechanism related to the ongoing, roughly N-S, Europe-Africa convergence vector. This complicated setting may promote the occurrence of mutual relationships between blocks, and generate peculiar local kinematics causing seis- mic activity. We infer that the great majority of the seismic events occur at the boundaries of the main or minor blocks, and therefore the alignments of seismicity allows the individuation of the different blocks and the main seismogenic belts. A major crustal structure subdivides the Adria Plate into a western and two eastern blocks, and approximately coincides with the axial zone of the Apennines along which most of the seismicity is concentrated.
    Description: Published
    Description: 121-138
    Description: 1T. Deformazione crostale attiva
    Description: 1IT. Reti di monitoraggio
    Description: 4IT. Banche dati
    Description: JCR Journal
    Keywords: Adria plate ; Apennines ; Active tectonics ; Seismicity ; Seismic flux ; GPS ; 04.06. Seismology ; 04.03. Geodesy ; 04.07. Tectonophysics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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    Structural inheritance controlling active crustal deformation in the Val d’Agri area (southern Apennines, Italy): new insights from finite element modelling (2018)
    Details
    Publication Date: 2019-01-18
    Description: The availability of a large amount of surface geological data and subsurface information gathered by the oil industry, together with seismic and geodetic data, allowed us to define and analyse the active structures in the Val d'Agri area of the southern Apennines. Taking into account that the study of interseismic deformation can be significant to identify locked fault areas that can potentially slip, in this study we present 2D elastoplastic finite-element models to reproduce interseismic characteristics of the study area. This hosts the largest Europe's onshore oil field and is characterised by an active extensional tectonic regime, as inferred from earthquake focal mechanisms and fault slip data from late Quaternary structures. Based on high-quality seismic profiles tied with deep well logs, we constructed a detailed geological section across the study area. Outcropping units are dissected by numerous brittle structures that formed at various stages during the tectonic evolution of the Apennines, while the deep ones are dominated by deeply rooted major faults. The rheological behaviour has been constrained by the reconstruction of the thermal structure of the fold and thrust belt, using available information from the foreland Apulian Platform and from temperature data from a series of wells. Starting from the geological model, we reproduced interseismic deformation by means of finite-element numerical modelling, varying boundary conditions and unlocking different fault segments. Our numerical models provide new insights into the controversial and widely debated active tectonic setting of the Val d'Agri area, confirming the major role played by structural inheritance and reactivation processes. In fact, recent low-magnitude seismicity tends to illuminate fault segments consisting of pre-existing reverse faults reactivated as normal faults in the present-day stress field. These long-lived, mature fault systems occurring in the buried Apulian Platform carbonates (and underlying basement) represent major brittle structures that cumulated displacements of up to a few kilometres over geologic time. As a result of their reactivation within the late Quaternary extensional stress field, these long-lived crustal structures are capable of nucleating also moderate- to large-magnitude earthquakes. The decoupling between deep and shallow structural levels, and the different inherited structures affecting them, explain the apparent contrast between the subdued surface expression of active fault systems and the known occurrence of large magnitude seismic events in the study area, thus reconciling apparently contrasting geological and geophysical constraints.
    Description: Published
    Description: 111-114
    Description: 1T. Deformazione crostale attiva
    Description: N/A or not JCR
    Keywords: Active tectonics ; Fault reactivation ; Stress field ; Seismicity ; Extensional tectonics ; Seismology ; Tectonophysics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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    Journal of Geophysics - Zeitschrift für Geophysik 46 (2018)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 35 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1979.
    Description: Inhaltsverzeichnis: Journal of Geophysics 46 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0008.pdf"〉Wave Propagation in Stratifield Anisotropic Media〈/a〉〈br〉 (Bossy, L.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0009.pdf"〉Radio Pulse Dispersion in the Ionosphere〈/a〉〈br〉 (Paul, A. K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0010.pdf"〉Ionospheric Absorption and Profiles of Electron Density and Loss-Rate in the Lower Ionosphere〈/a〉〈br〉 (Kotadia, K. M., Gupta, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0011.pdf"〉Effective Energy Reception of the Electron Gas per Created Ion Electron Pair〈/a〉〈br〉 (Bilitza, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0012.pdf"〉Empirical Model of Global Electron Temperature Distribution Between 300 and 700 km Based on Data From Aeros-A〈/a〉〈br〉 (Spenner, K., Plugge, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0013.pdf"〉Intercomparison Between Aeros Electron Temperature Model and Mean Temperature Profiles of Different Incoherent Scatter Radar Stations〈/a〉〈br〉 (Spenner, K., Bilitza, D., Plugge, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0014.pdf"〉Simultaneous Smoothed Variations of Signal Amplitude and Mean Doppler Shift in 42 MHz Auroral Backscatter〈/a〉〈br〉 (Haldoupis, C. I., Sofko, G. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0015.pdf"〉Overnight Statiscal Variation of the North-South Movements of Radio Auroral Irregularities〈/a〉〈br〉 (Haldoupis, C. I., Sofko, G. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0016.pdf"〉Q of Mode 〈sub〉O〈/sub〉S〈sub〉O〈/sub〉〈/a〉〈br〉 (Knopoff, L., Zürn, W., Rydelek, P. A., Yogi, T.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0017.pdf"〉Finite Element Convection Models: Comparison of Shallow and Deep Mantle Convection, and Temperatures in the Mantle 〈/a〉〈br〉 (Kopitzke, U.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0018.pdf"〉Detection Probabilities for Weak Regional Seismic Events〈/a〉〈br〉 (Shapira, A., Kulhánek, O., Wahlström, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0019.pdf"〉Accuracy of Ray Theoretical Seismograms〈/a〉〈br〉 (Červený, V.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0020.pdf"〉Auroral Particle Fluxes in the Ionosphere〈/a〉〈br〉 (Wilhelm, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0021.pdf"〉The Shape of the Cosmic Ray Modulation Region of the April 30, 1976, Event, as Deduced from HELIOS-1, HELIOS-2, IMP-8, and Neutron Monitor Data〈/a〉〈br〉 (Geranios, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0022.pdf"〉Magnetic Rotational Hysteresis Loss in Titanomagnetites and Titanomaghemites – Application to Non-Destructive Mineral Identification in Basalts〈/a〉〈br〉 (Manson, A. J., O’Donovan, J. B., O’Reilly, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0023.pdf"〉The Geomagnetic Field and Its Secular Variation on Finland and Nearby Countries〈/a〉〈br〉 (Nevanlinna, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0024.pdf"〉Age and Crustal Structure of the Canary Islands〈/a〉〈br〉 (Schmincke, H.-U.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0025.pdf"〉Rinneite-Dating of Episodic Events on Potash Salt Deposits〈/a〉〈br〉 (Lippolt, H. J., Raczek, I.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0026.pdf"〉Magnetic ULF-Waves in the Vicinity of Active Auroral Forms〈/a〉〈br〉 (Klöcker, N., Theile, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0027.pdf"〉Bursts of Irregular Magnetic Pulsations During the Substorm〈/a〉〈br〉 (Kangas, J., Pikkarainen, T., Golikov, Y., Baransky, L., Troitskaya, V., Sterlikova, V.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0028.pdf"〉Cosmic Noise Absorption Events and Magnetic Pulsation Activity During Substorms〈/a〉〈br〉 (Wedeken, U., Hillebrand, O., Krenzien, E., Ranta, A., Ranta, H., Voelker, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0029.pdf"〉On the Sources of the 12-Month Wave in the An and As Geomagnetic Activity Indices〈/a〉〈br〉 (Mayaud, P. N.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0030.pdf"〉Calculation of the Effect of the Oceans on Geomagnetic Variations With an Application to the Sq Field During the IGY〈/a〉〈br〉 (Hobbs, B. A., Dawes, G. J. K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0031.pdf"〉Localized Source Effects on Magnetotelluric Apparent Resistivities〈/a〉〈br〉 (Quon, C., Vozoff, K., Hoversten, M., Morrison, H. F., Lee, K.-H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0032.pdf"〉Long-Wavelength Magnetic Anomalies as a Source of Information About Deep Crustal Structure〈/a〉〈br〉 (Krutikhovskaya, Z., Pashkevich, I.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0033.pdf"〉Palaeomagnetism and the Early Magmatic History of Fuerteventura (Canary Islands)〈/a〉〈br〉 (Storetvedt, K. M., Mongstad Våge, H., Aase, S., Løvlie, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0034.pdf"〉Ray Theoretical Seismograms for Laterally Inhomogeneous Structures〈/a〉〈br〉 (Červený, V.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0035.pdf"〉Macroseismic Field of the Earthquake of September 3, 1978, in the Swabian Jura〈/a〉〈br〉 (Procházková, D., Schneider, G., Schmedes, E., Drimmel, J., Fiegweil, E., Lukeschitz, G., Vogt, J., Courtot, P., Godefroy, P., Grünthal, G., Mayer-Rosa, D., Berger, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0036.pdf"〉Approximate Diffraction Theory for Transparent Half-Planes with Application to Seismic-Wave Diffraction at Coal Seams〈/a〉〈br〉 (Fertig, J., Müller, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0037.pdf"〉Seismic Investigations of the Subcrustal Lithosphere Beneath Fennoscandia〈/a〉〈br〉 (Cassell, B. R., Fuchs, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0038.pdf"〉Northern Part of the Tonga Region: A Complicated Subduction Closure〈/a〉〈br〉 (Hanuš, V., Vaněk, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0039.pdf"〉Palaeomagnetic and Rockmagnetic Properties of the Permian Volcanics in the Western Southern Alps〈/a〉〈br〉 (Heiniger, C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0040.pdf"〉Palaeomagnetism of Upper Cretaceous Limestones from the Münster Basin, Germany〈/a〉〈br〉 (Heller, F., Channell, J. E. T.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0041.pdf"〉A Two-Dimensional Magnetometer Array for Ground-Based Observations of Auroral Zone Electric Currents During the International Magnetospheric Study (IMS)〈/a〉〈br〉 (Küppers, F., Untiedt, J., Baumjohann, W., Lange, K., Jones, A. G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0046/LOG_0042.pdf"〉Estimation of the Dispersion of Compressional Waves in Rocks From Ultrasonic to Seismic Frequencies〈/a〉〈br〉 (Ramananantoandro, R.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; AEROS Satellite ; Alps ; Auroral Zone Phenomena ; Canary Islands ; Coal Prospection ; Cosmic Rays ; Cretaceous ; Crust of Earth ; Electromagnetic Induction ; Electromagnetic Wave Propagation ; Explosion Seismology ; Fennoscandia ; Free Oscillations ; Geochronology ; Geomagnetic Activity ; Geomagnetic Field ; Geomagnetic Pulsations ; Ionosphere ; Lithosphere ; Magnetotellurics ; Mantle of Earth ; Palaeomagnetism ; Rock Magnetism ; Salt Rocks ; Secular Variation ; Seismic Quality Factor Q ; Seismic Waves ; Seismicity ; Sq Variation ; Subduction Zones ; Theoretical Seismograms ; ULF Waves ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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  • 69
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    Journal of Geophysics - Zeitschrift für Geophysik 47 (2018)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 34 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1980.
    Description: Inhaltsverzeichnis: Journal of Geophysics 47 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0011.pdf"〉Iceland: Evolution, Active Tectonics, and Structure. A Preface〈/a〉〈br〉 (Jacoby, W. R., Björnsson, A., Möller, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0012.pdf"〉Tectonic Framework, Evolution. A Continuum Model of Crustal Generation in Iceland; Kinematic Aspects〈/a〉〈br〉 (Pálmason, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0013.pdf"〉Hawaiian Rifts and Recent Icelandic Volcanism: Expressions of Plume Generated Radial Stress Fields〈/a〉〈br〉 (Wyss, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0014.pdf"〉Observations of the Morphology and Structure of the Sea Floor South and West of Iceland〈/a〉〈br〉 (Johnson, G. L., Pálmason, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0015.pdf"〉Stratigraphy and Paleomagnetism of the Esja, Eyrarfjall and Akrafjall Mountains, SW-Iceland〈/a〉〈br〉 (Kristjansson, L., Fridleifsson, I. B., Watkins, N. D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0016.pdf"〉Magnetic Anomalies (〈i〉ΔZ〈/i〉) in NE-Iceland and Their Interpretation Based on Rock-Magnetic Investigations〈/a〉〈br〉 (Becker, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0017.pdf"〉Palaeointensity Measurement on Postglacial Lavas From Iceland〈/a〉〈br〉 (Schweitzer, Ch., Soffel, H. C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0018.pdf"〉On the Evolution of the Reykjanes Ridge South of 60° N Between 40 and 12 Million Years Before Present〈/a〉〈br〉 (Voppel, D., Rudloff, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0019.pdf"〉Morphology and Magnetic Anomalies North of Iceland〈/a〉〈br〉 (Vogt, P. R., Johnson, G. L., Kristjansson, L.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0020.pdf"〉Morphology of the Reykjanes Ridge Crest Near 62°N〈/a〉〈br〉 (Jacoby, W. R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0021.pdf"〉New Heat Flow Observations on the Reykjanes Ridge〈/a〉〈br〉 (Bram, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0022.pdf"〉Gravity and a Model of the Median Valley〈/a〉〈br〉 (Collette, B. J., Verhoef, J., de Mulder, A. F. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0023.pdf"〉Deformation, Stress, Seismicity. Statistical Analysis of Damaging Earthquakes and Volcanic Eruptions in Iceland From 1550–1978〈/a〉〈br〉 (Gudmundsson, G., Saemundsson, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0024.pdf"〉Geodetic Measurements and Horizontal Crustal Movements in the Rift Zone of NE-Iceland〈/a〉〈br〉 (Möller, D., Ritter, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0025.pdf"〉Results of Height Measurements in Northern Iceland 1965/1977〈/a〉〈br〉 (Spickernagel, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0026.pdf"〉Gravity and Height Variations During the Present Rifting Episode in Northern Iceland〈/a〉〈br〉 (Torge, W., Kanngieser, E.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0027.pdf"〉Gravity and Elevation Changes Caused by Magma Movement Beneath the Krafla Caldera, Northeast Iceland〈/a〉〈br〉 (Johnson, G. V., Björnsson, A., Sigurdsson, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0028.pdf"〉Subsidence Events in the Krafla Area, North Iceland, 1975–1979〈/a〉〈br〉 (Tryggvason, E.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0029.pdf"〉Surface Deformation of the Krafla Fissure Swarm in Two Rifting Events〈/a〉〈br〉 (Sigurdsson, O.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0030.pdf"〉Seismological Evidence for Lateral Magma Intrusion During the July 1978 Deflation of the Krafla Volcano in NE-Iceland〈/a〉〈br〉 (Einarsson, P., Brandsdóttir, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0031.pdf"〉Measurement of Distance and Tilt Changes in Fissures of Northern Iceland〈/a〉〈br〉 (Pelzer, H., Gerstenecker, C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0032.pdf"〉Recent Earthquakes in the Hengill-Hellisheidi Area in SW-Iceland〈/a〉〈br〉 (Foulger, G., Einarsson, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0033.pdf"〉Rock Stress in an Icelandic Thermal Area, With Implications on Stresses in the Oceanic Lithosphere〈/a〉〈br〉 (Voight, B., Simon, R., Thorsteinsson, T., Pálmason, G., Taylor, C., Seret Opzoomer-Talma, S. H., Haimson, B. C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0034.pdf"〉Crustal and Upper Mantle Structure. A Model of Electrical Resistivity Beneath NE-Iceland, Correlation with Temperature〈/a〉〈br〉 (Beblo, M., Björnsson, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0035.pdf"〉A Seismic Study of the Rift Zone in Northern Iceland〈/a〉〈br〉 (Zverev, S. M., Litvinenko, I. V., Pálmason, G., Yaroshevskaya, G. A., Osokin, N. N., Akhmetjev, M. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0036.pdf"〉A Seismic Crustal Study of the Axial Rift Zone in Southwest Iceland〈/a〉〈br〉 (Zverev, S. M., Litvinenko, I. V., Pálmason, G., Yaroshevskaya, G. A., Osokin, N. N.)〈/li〉 〈li〉〈a href=" https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0037.pdf"〉Seismic Structure of the Icelandic Crust Above Layer Three and the Relation Between Body Wave Velocity and the Alteration of the Basaltic Crust〈/a〉〈br〉 (Flóvenz, Ó. G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0038.pdf"〉Crustal Structure of the Iceland-Faeroe Ridge〈/a〉〈br〉 (Bott, M. H. P., Gunnarsson, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0039.pdf"〉Reykjanes Ridge Iceland Seismic Experiment (RRISP 77)〈/a〉〈br〉 (Angenheister, G., Gebrande, H., Miller, H., Goldflam, P., Weigel, W., Jacoby, W. R., Pálmason, G., Björnsson, S., Einarsson, P., Pavlenkova, N. I., Zverev, S. M., Litvinenko, I. V., Loncarevic, B., Solomon, S. C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0040.pdf"〉Seismic Structure of Iceland Along RRISP-Profile I〈/a〉〈br〉 (Gebrande, H., Miller, H., Einarsson, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0041.pdf"〉Seismic Structure Along RRISP – Profile I on the Southeast Flank of the Reykjanes Ridge〈/a〉〈br〉 (Goldflam, P., Weigel, W., Loncarevic, B. D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0042.pdf"〉Crustal Development of the Reykjanes Ridge From Seismic Refraction〈/a〉〈br〉 (Bunch, A. W. H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0043.pdf"〉Reykjanes Ridge Crest Studied by Surface Waves With an Earthquake-Pair Technique〈/a〉〈br〉 (Keen, C. E., Fricker, A., Keen, M. J., Blinn, L.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0047/LOG_0044.pdf"〉The Evolution of the Lithosphere at the Southeast Flank of Reykjanes Ridge From Surface Wave Data〈/a〉〈br〉 (Jacoby, W. R., Girardin, N.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; Asthenosphere ; Crust and Upper Mantle ; Deformation ; Dynamic Models ; Earthquake Statistics ; Evolution of Crust and Lithosphere ; Geodetic Measurements ; Geothermics ; Gravity ; Heat Flow, Geothermics ; History of Geophysics ; lsostasy ; Lithosphere ; Magma Movement ; Magnetic Anomalies ; Magnetotellurics ; Paleomagnetism ; Plate Tectonics ; Plume Hypothesis ; Ridge Model ; Ridge Structure ; Ridge Topography ; Rifting and Volcanism ; Rock Magnetism ; Seafloor Spreading ; Seafloor Morphology ; Seismic Anisotropy ; Seismicity ; Seismic Reflection ; Seismic Refraction ; Stress, Strain ; Surface Waves ; Temperature ; Velocity-Density Systematics ; Viscosity ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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  • 70
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    Providing brood stocks of Caspian trout (Salmo trutta caspius) from Mazandaran Rivers and production of one hundred thousand fries (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian trout (Salmo trutta caspius) is one of valuable fishes of the Caspian sea for people living in the Northern coastal area of Iran. Since fish stock and natural resources protection is one the Iranian fisheries research objectives, the most activity on Caspian trout rehabilitation was focused on releasing thousands of smolts in the rivers discharge to Caspian Sea. Catch statistics of this species has declined over last decades thus this study on quality of provided brood stocks and producing fries with suitable quality can help rehabilitation and rearing of this valuable species. Several rivers were considered for providing brooders to keep genetic resources variety of sea stocks. In spawning season 25 (9 male, 16 female) and 30 (5 male, 25 female) brooders were collected from fishermen in Mazandaran rivers and Gyilan coasts provinces respectively. After propagation and larvae rearing, 11500 (10-15 g.) and 50000 (less than 10 g.) juveniles were released in Gyilan and Mazandaran rivers respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian trout ; Salmo trutta caspius ; Brood stocks ; Rehabilitation ; Fisheries ; Species ; Rearing ; Genetic ; Propagation ; Juvenile
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 32pp.
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  • 71
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    The effectiveness of artificial reefs for rehabilitation and production of fisheries in Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: An artificial Reef is a fabricated, underwater structure, typically built for promoting marine life in areas of generally featureless bottom. Creating artificial reefs began from 2000 in southern provinces in Iran. This study has surveyed about the Bushehr and Khozestan states. The objective is to determine the effectiveness of artificial reefs in attracting and enhancing the production different aquatics through increasing of fish assemblage and fishery. The performance of artificial reefs deployed off the coast of the Persian Gulf in 10 to 15m, was evaluated. The reefs comprised of seven artificial and one control (natural) statistical tests plan in three replicates. Three types of artificial reefs were used in this study. That two were designed reefs and one was not designed or used material. The experimental plan consisted (i) Reef ball (R), designed hemispherical shaped; (ii) Laneh Mahi (L), designed pyramid shaped; (iii) Used material (U); (iv) mixed (RL); (v) mixed (RU); (vi) mixed (LU); (vii) mixed (RLU); and (viii) control site (CS). Trap nets and under-water visual census surveys were adopted for seasonal sampling of fish aggregation. Results of statistical analysis using ANOVA and T-test of the mean Catch per Unit Effort (CPUE) showed significant difference (p〈0.05) in term of computing number of fish for aggregation of fishes. The study has concluded that reef deployments have influenced favorably the fish communities and fish harvests. Therefore, the artificial reefs, especially the mixed RLU, are appropriate tools for future fishing enhancement in the Persian Gulf of Iran.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artificial reefs ; Fisheries ; Marine ; Survey ; Hemispherical ; ANOVA ; CPUE ; Underwater structure
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 188pp.
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  • 72
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    Evaluation of restocking program in north Alborz (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Gillan , Mazandaran and Gorgan provinces have temperate climate, thus they have more potential for aquatic animal culture. There are thousands hectare of lands for Aquaculure and fisheries in adjacent to Caspian Sea in this provinces. these areas(North alborz) have provided a favorable back ground for aquatic animal breeding and stock enhancement of species in the sea. As a result, this investigation executed during two stages (phases). At first stage, the goal of this project included the feasibility study and demonstrating the existing situation of fish stock enhancement activities in North Alborz area and second phase is to survey on distribution, and production activities of stock enhancing hatcheries as well as their constructions,and production time table. Survey was started frome 2006 to 2008 by using qestionaries in 7 hatcheries from tree provinces.results revieled that there are more than 10 species was subjected to restocking .Total releasing was about 300 millions of fry and finger lings in to the Caspian sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Stock Enhancement ; Broodstock ; Production ; Yield ; Artificial propagation ; Bony fishes ; Sturgeon fishes ; Restocking ; Aquatic ; Culture ; Aquaculure ; Fisheries ; Breeding ; Survey ; Hatcheries ; Fry ; Fingerlings
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 191pp.
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  • 73
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    Research and developing a model of innovation systems in fisheries and aquaculture industry (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The "fisheries and aquaculture industry innovation system" is one of the subsystems of Agricultural innovation system (AIS), also has many characteristics of that system .Since this section contains most of the components and AIS institutions, it can be examined as a part of the national innovation system. Due to the structure of the innovation system in the fishery system, a set of functions and institutions of this system are most important .It is therefore important that the system be analyzed and by reviewing the existing state institutions and functions of this system, the main problems and challenges identified. Understanding of the institutions and functions of fishery innovation system and analyze its problems and provide an improved model for fishery innovation system, is most activity in shaping major policy innovation in fishery sector. This step is very important to conduct innovative activities in the fishery sector. In this study, using a system perspective, the current status of the various factors affecting fishery development was assessed and the main drivers and challenges and solutions to improve the detection and analysis was provided. The results show that during the past eighty years, a number of research centers and educational institutions in the public sector have been developed .but this system, despite having considerable institutional capacity, is still in the middle stages of institutional development. In these years, the policy approach was linear, not system approach, so little attention has been to the development of science and technology intermediary institutions, coordinator organizations, venture capital funds, and the institutions of technology transfer ,particularly in the public sector.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fisheries ; Aquaculture ; Agricultural innovation system ; AIS
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 112pp.
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    Study of Ecology and the Potential for Exploiting Saline Surface Waters of Fars Province in Aquaculture- Dehram River (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Aquaculture activity is restricted mainly to rainbow trout in cold waters and carps in warm waters in inland waters of Iran as well as Fars Province. Probably for this reason saline waters of south and southeast Fars have not been used for aquaculture. These rivers are ecosystems with a diverse biota, it is predictable that can be found some there endemic aquatic organisms with a potential for aquaculture. Finding a suitable organism can help increase wise use of this natural resource, and local production and recruitment. However, it is highly needed to investigate various environmental elements prior to any use to obtain an estimation of the environmental consequences, parallel to finding usage potentials. In This study, we investigated Dehram saline river in south of Fars Province. Hydrological and physiographical properties, chemical composition of the river, and aquatic populations were sampled and measured monthly in 3 stations in one year. Salinity, electrical conductivity, and total dissolved solids increased from station 1 to 3, reaching from 6.6 g/L, 14.3 g/L, and 12800 µs/cm to 13.5 g/L, 17.7 g/L, and 16500 µs/cm, respectively. Dissolved oxygen and oxygen saturation were higher in station 3, and in autumn and winter. Nitrite showed lowest values in winter (0.006 mg/L) and highest values in spring (0.013 mg/L). Nitrate showed the lowest concentration in station 3 (0.43 mg/L), but no differences were seen among seasons. Ammonium showed no differences among stations or seasons. Phosphate levels in station 1 and 3 were 0.13 mg/L‌to 0.17 mg/L, with the highest level (0.29 mg/L) seen in the spring. Five species of fishes were identified in the river, which all were widely favored by local people. Some of these have been categorized as edible in previous studies, others as ornamental. On the other hand, intensive growth of an algal species throughout the river demonstrates a potential for algal cultivation. Significant role of algae in production of food for both man and livestock is now well recognized in aquaculture industry.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecology ; Dehram River ; Limnology ; Saline water ; Physico-chemical parameters ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 62pp.
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  • 75
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    Study on propagation and breeding of Hamoun fish (shizothoraxzarudnyi) to one gram weight in earthen pond (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Hamoun fish, Schizothorax zarudnyi, is an indigenous species of the eastern waters of Iran, which is exclusively found in this region. However recently drought occurrence in the Chahnimeh reservoirs (a semi natural water body) making them vulnerable to extinction. As an appropriate action to address this problem and according to the 3 side contract between Italian Government – UNDP - Islamic republic of Iran Government and the Italian government financial support to reduce poverty in the Province of Sistan-Baluchestan through the reinforcement and dissemination of aquaculture activities the project was developed at the Hamoun Research Unit by the Chahbahar Fisheries Research Center to record the breeding normative of 1 g weight larvae for restocking and other researching purposes. 331 broodstocks of the indigenous species Shizothorax zarudnyi weighing 800-2450 g were collected from the Chahnimeh reservoirs in early autumn, 2006. From 5/3/2007 ( the project is supported and communicated on 2010) , Ovulation was stimulated with three stimulators; pituitary extract (3-6 mg kg-1 body weight), GnRH-A (20-30 mg kg-1 body weight) and anti dopamine (10-15 mg kg-1 body weight) that was given in 2-3 doses to breeders. Of 169 injected breeders , some were injected On mid March of 2007 (12-13 ºC water tempreture) responded to the injection 25% ,while the rest were injected On April of 2008 (14-16 ºC water tempreture) responded to the injection 65%. In the present project of 167 breeders 82 were female and 87 male. Totally 30 female breeders released their eggs in different stages. 20 female breeders released their eggs completely, 3 breeders released half of their eggs and 7 released 1/3 of their eggs. The male breeders just injected in the final dose of hormontrapy and all were ready for releasing sperms however the ovulation in female breeders occurs between 353-428 h ºC and after the final dose of injection. Ripe eggs were stripped from the females and fertilization was done by the dry method. Fertilized eggs were transferred to veis incubators and troughs. Incubation period for eggs differs and larvae hatch out after about 910 days at an average water temperature of 12.5 °C. Maintained at 13-14 °C, complete absorption of yolk sac in Shizothorax zarudnyi larvae occurred after 5-8 days. Larvae were fed with a mixture of powdered milk and egg yolk in this stage followed by decapsulated Artemia cysts and nauplii of Artemia and then on formulated starter diets used for carps . Because the ponds were not ready, larvae were maintained in troughs for about ten days before they were transferred to two 1200 m2 earthen ponds where they reached a body weight of about 1 g. They were then handed over to the Iranian Fisheries department in the region. Larvae were fed with the starter feed SFCO in the earthen ponds. About 350 thousand larvae were stocked in two earthen ponds. Based on the results of present study and other studies we may conclude that artificial breeding in Schizothorax can be successfully achieved at 14-16 ºC in flow through systems using hormone therapy (combination of GnRha and anti dopamine) and larvae could be easily cultured in earthen ponds. However this species exhibits lower growth rates as compared to carps its high expenses could have an important role in economical feasible.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economical ; Hamoun fish ; Schizothorax zarudnyi ; Breeding ; Species ; Aquaculture ; Temperature ; Female ; Eggs ; Hormontrapy ; Sperm ; Ovulation ; Larvae ; Fisheries ; Earthen ponds
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
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    Determination of pollution condition in Babolroud River from viewpoint of pesticides and agrochemicals fertilizers (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Babolroud River is one of the important rivers for fisheries and environmental aspect that locared in center part of Mazandaran province. The river has a span of 92 km starting from Albourz mountainous and end up at the southern part of Caspian Sea. This study was done for five months (3rd Feb. through 5th July, 2008) for the better understanding of pollution situation such as organophosphorous, organochlorine pesticides and agrochemical fertilizer that drainage from paddy fields and horticultures to the river. A total of three main sites for pesticides and plus five sub-sites for drainage were selected for observation in three different regions of the river (mountainous, plain and estuary). The organochlorine and organophosphorous pesticides measured by GC (ECD and TSD detectors) with US-EPA (508) and AOAC procedure and agrochemical fertilizer parameters were measured by ASTM method. The maximum concentrations of aldrin, lindane, heptachlor epoxyde, DDE and β- BHC (period 1), δ- BHC and endrin (peiod 2), heptachlor and DDT (period 3), α- BHC (period 3 & 4), dieldrin (period 4) were 6.02, 0.85, 0.51, 0.50, 0.22, 0.35, 0.23, 0.50, 0.46, 0.19 and 0.16 µg/l, respectively. The maximum concentrations of four components of organophosphorous such as Diazinon and Chlorpyrifos (period 1), Malathion (period 2), Azinphos methyl (period 3) were 1.36, 0.46, 0.44 and 2.56 µg/l, respectively. The maximum amounts of tree components of parameters of agrochemichals fertilizers indictor such as total nitrogen (period 2, sub-site 5), total phosphorus and orthophosphate (period 4, sub-site 5) and organo-phosphorus (period 3, sub-site 4) were 5990, 1290, 1220 and 336 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in sediments of the river such as lindane (period 2, site 2), δ- BHC (period 1 site 3), α- endosulfan (period 1, site 2), endrin and heptachlor epoxide (period 2, site 2) and DDE (period 2, site 1) were 0.99 0.54, 0.29, 0.19 and 0.19 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in fish tissue of the river such as endosulfan sulfate, lindane, endrin, δ- BHC and DDE were 0.32, 0.29 0.27, 0.25 and 0.21 µg/l, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Agrochemicals ; Organochlorine ; Organophosphorus Pesticids ; Pollutants ; River Fish ; Sediments ; Pesticides ; Fertilizers ; Fisheries ; α- endosulfan
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 81pp.
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  • 77
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    Monitoring of fisheries resources in artificial reefs in east of Kish Island waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Artificial reefs are manmade materials deployed under water in order to improve invironment and increase the exploaitation of fishing area. Usage of artificial technic has developed due to increase of world pupolation and need to supply of protein, aim to restoring of natural spicialy rehabilitation of demersal fishes. It has effecte to increase the production in order sustainable exploitation. Coasts and Islands have destruction due to over harvesting from ecosystems and other activities by humans and natural, These caused many aquatic as demersal fishes has endangered in Persian Gulf and Oman Sea. The artificial reef is one way or method that can improve the environment and restore the aquatic. Iranian fisheries has established an artificial reefs area in west of Kish Island. This area has studied during one year, Data of assembeled fishes and physical sampling were collected in seasonal during spring, summer, autumn and winterd. Ther were tow tritment for sampling as artificial reefs site and a control site. Collected data has analyzed and evaluated by SPSS and Exel. The results showed that there was significant difference between the sites and assembled fishes in artificial reefs were more than control site. Consequently the artificial reefs can be a tool and technic to improve the marine environment and increase the production of fishes, especially the demersal fishes.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Coastal Development ; Fish Production ; Marine ; Artificial reefs ; Fisheries ; Population ; Environment ; Demersal fishes
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 72pp.
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  • 78
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    Road-map of aquatic-food processing development of I.R. of IRAN (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Scientific and practical planning for achieving the lofty goals of the Islamic Republic of Iran in the framework of development plan of 1404 is the requirement to achieve sustainable development. Establishing roadmap of industries and products was considered by the scientific and technology office of the deputy president, in order to achieve the abovementioned objectives and in line with the national scientific comprehensive map. Therefore, present study was conducted as the roadmap of national aquatic-food processing development using available approved documents e.g. Iran perspective of 1404, fifth developing plan of I.R. of Iran, developing plan of Iranian fisheries organization in 1400 and the available approved statistical data. Current perspective of the aquatic-food processing is presented at the first chapter of the study. The second chapter reviewed the problems and obstacles. Third chapter tabulated the published studies and researches in fish handling and processing so far. Finally fourth chapter recommends executive and research projects considering quantitative and qualitative objectives of Iran 1400 plan as well as fifth developing plan of Shilat-Iran (Iranian fisheries organization). Authors hope the study to be useful in the national planning of I. R. of Iran in the future.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Road-map ; Aquatic ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 79
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    Ecological study on fisheries important rivers and bays in the south part of the Caspian Sea 2nd phase: Gorgan Bay (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study ichthyoplankton, phytoplankton, zooplankton, benthics and hydrochemistry parameters were studied. 9 out of 11 sampling stations were in the Gorgan Bay area and 2 of them were in the mouth of the Bay. Ichthyoplankton survey were carried out in 6 stations and the other surveys such as phytoplankton, etc were done in 11 stations in 2009. Gorgan Bay map and position of sampling sites are given at the end of material and methods section. Biomass and frequency of phytoplankton at different stations, months and seasons were calculated that are presented in Tables 1 to 3. Hydro-chemical parameters such as water temperature, air temperature, visibility, DO, BOD5, pH, Alkalinity (bicarbonate, carbonate and total) , Hardness (calcium, magnesium), CL,EC, Salinity, N (nitrate, nitrite, NH3), Phosphate were measured and results are shown Table 11 . Biomass (mgr/m3) and numbers (ind./m3) of 47 genus of different phylum of phytoplanktons such as Cyanophyta, Chlorophyta, Pyrophyta, Chrysophyta and Euglenaphyta as well as different phylum of zooplanktons consist of Protozoa, Arthropoda, Rotifera and Cyliophora were estimated. Frequency of phytoplanktons (ind/m3) was 131.2, 1.6, 65.3, 18.9 and 23.8 millions respectively. Furthermore, their biomass was 308.4, 1.9, 1358.9, 295.1 and 124.7 mg/m3, respectively. The maximum and minimum numbers were observed in Leptolingbaya belonged to Cyanophyta and Diatoms of Chrysophyta 84.3 and 0.025 million ( ind/ m3) respectively. The maximum and minimum biomass was observed in Gyrosigma (Chrysophyta) and Tetradron (Chloropyta), 12317.3 and 0.014 mg/m3 respectively. The average biomass of zooplankton was measured 531.74, 30.77, 225.07, and 96.26 mg/m3 respectively and the total was attained 883.83 mg/m3 Table 5 . The maximum and minimum biomass of all zooplanktons was estimated in November and July, 3446.23 and 6 mg/m3 respectively. Furthermore, the maximum and minimum numbers of zooplanktons were found in September and July which were 48.4 and 0.002 millions respectively and the average number was 8.4 ind/m3 Table 4 . Also numbers and biomass (gr/m2) of 11 families of benthos which inhabit Gorgan Bay such as Annelida, Mollusca and Arthropoda were investigated in separated stations and distinctive months. The maximum and minimum biomass of benthos was observed in January (42.91 gr/m2) and March (0.6428 gr/m2). The biomass was considerable in April, February, August and December (Tables: 4, 5 and 6).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Hydrochemistry ; Ecological study ; Fisheries ; Ichthyoplanktons ; Phytoplankton ; Zooplankton ; Benthic ; Sampling ; Biomass ; Temperature ; Visibility ; pH ; Alkalinity ; Salinity ; Phosphate ; Cyanophyta ; Annelida ; Mollusca
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 97pp.
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  • 80
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    Application of microsatellite markers to determine populations of the Persian sturgeon (Acipenser persicus) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The objective of this study was to analyse the population genetic structure of the Persian sturgeon (Acipenser persicus) in Sefidrud and Gorganrud rivers watershed based on the characterization of microsatellite markers during 2006 – 2008. 100 samples of Persian sturgeon were collected from two regions. Four microsatellite loci ( Ls 68 , Spl 168 , Spl 173 and Afu 68 ) were analyzed for the molecular characterization of this species which resulted in polymorphic patterns. DNA bands were analysed using Biocapt and GenAlex software package. A total of 109 alleles were observed of which the maximum number of alleles (17) were found in Spl168 locus which belonged to sturgeons from Sefidrud river,s watershed and the minimum number of alleles (10) in Ls68 locus belonging to the sturgeons from Gorganrud river,s watershed. Results of microsatellite analysis revealed that the differences between samples of two regions were not statistically significant (p〉0.05), neither for the average number of alleles per locus nor for observed heterozygosities. The calculated Fst and Rst between two regions was 0.07 and 0.17 showing that the genetic difference was significant (p〈 0.01). Samples from Sefidrud river,s watershed in Spl173, Afu68 and Spl168 loci and samples of other regions in Afu68 and Spl168 loci were at Hardy-Weinberg equation. The genetic distance was calculated as 0.4 which represents a significant genetic difference between samples of two studied areas. I n conclusion, this study suggests that the Persian sturgeons in two regions of the southern part of the Caspian Sea are genetically differentiated, therefore fisheries management of these unique stocks for restocking and conservation of gene pools is highly recommended.
    Description: Published
    Keywords: Persian sturgeon ; Acipenser persicus ; Caspian Sea ; Microsatellite ; Genetic structure ; Population genetic ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.596-606
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  • 81
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    Population dynamics of the Metapenaeus monoceros (Fabricius, 1798) in North-eastern Mediterranean Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Monthly sampling of speckled shrimp was conducted by bottom trawl in the Iskenderun Bay between November 2009 and October 2010. There was a linear relationship between carapace length and total length in males and females (TL = -0.112 + 0.2294*CL R2 = 0.8298, n = 327) for males, (TL = -0.3918 + 0.2731 * CL R2 = 0.8919, n = 457) for females, and (TL = -0.378 + 0.2684 * CL R2=0.8492, n=784) for total individuals. Total length-weight relationships were W=0.0135*TL2.7817 for males, W= 0.0115*TL2.8535 for females, and W=0.0109*TL2.8108 for total individuals. The von Bertalanffy growth constants in length was TL= 162.75mm, K = 1.39 year–1, t0 = -0.0604 year for males TL= 178.40mm, K = 1.51 year-1, t0 = -0.780 year for females and TL= 174.14mm, K = 1.47 year-1, t0 = -0.0721 year for total individuals. In this study, the total (Z), natural (M) and fishing (F) mortality coefficient and exploitation rates (E) were determined as 5.39 year-1, 2.39 year-1, 3.00 year-1 and E=0.56 year-1, respectively for all of the obtained individuals.
    Description: Published
    Keywords: Biology ; Physiology ; Metapenaeus monoceros ; Population dynamical ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.955-966
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  • 82
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    Age and growth of Capoeta erhani Turan, Kottelat and Ekmekçi, 2008 from the Seyhan River (Southeast of Turkey) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Capoeta erhani is an endemic species to Southeast of Turkey. To date the information on biology of this species from inland waters of Turkey is very limited. The present study aims to provide the basic age and growth parameters of C. erhani from the middle basin of the Seyhan River. In total, 255 individuals were collected seasonally between October 2013 and September 2014. The overall sex ratio was 3.47:1 M : F. The total length of the specimens ranged from 10.4 to 33.0 cm and the weight from 9.0 to 360.0 g. The ages of total examined fish ranged from 0 to 5 years. Maximum age was found to be 5 years for both sexes. Length-weight relationship was described as logW= -5.067 + 3.168 logTL (r2= 0.972). The von Bertalanffy growth parameters were: L∞ = 32.51 cm; k = 0.400 year-1; t0 =-0.930 year for the entire population. Munro’s phi prime index in males, females and both sexes was calculated as 6.00, 6.12 and 6.04.
    Description: Published
    Keywords: Biology ; Physiology ; Capoeta erhani ; Endemic species ; Growth parameters ; Fisheries ; Sex ratio ; Length-weight relationship ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.980-994
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  • 83
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    Study on Tehran citizens behavior change in consumption of the aquatic products (2018)
    Details
    Publication Date: 2021-05-19
    Description: To understand the change in fish consumption behavior of Tehran citizens (Iran), in the year 2005, an investigation was conducted using questionnaire. Using independent random method, 316 families covering all 22 districts of Tehran were selected. The results were combined with that acquired in the year 2001 to develop marketing programs. We used Fridman, K2 tests for nonparametric statistics and Z (normal distribution) and Phi Cramer index for analysis. The results showed that the quality and freshness of the products and the hygienic state of the distributing places had the highest effects on purchase. Also, the price and packaging had the same priority as in the year 2001. No significant relationship was found between income level of the families and their fish consuming tendency. Comparing the two years of study, we found that 16.6% more people preferred packed food in the year 2005 while per capita consumption had increased from 2.8 to 3.46kg. With the information on production date and health license already available on the products, the consumers demanded dietary contents. Considering the increase in marine fishery products, the families tended to consume more of the farmed aquatics with the live selling of rainbow trout being preferred the most. The behavior of consumers and their decisions to purchase fishery products in this period depended on production directions and economic development strategies which indicated positive aquaculture development programs in the country. We recommend continuing current policies regarding marketing factors. The results also showed that uncertainly about freshness and health of the products is the main reason for purchase from the representative fishery stores. The results shows more research and advertisement can improve awareness about packing advantages and its role in decreasing wastes and creating more added values.
    Description: Published
    Keywords: Oncorhynchus mykiss ; Brackish ; Marine fisheries ; Diets ; Fish consumption ; Marketing ; Aquaculture products ; Fisheries ; Marine ; Aquaculture ; Feeding experiments ; Economics ; Food ; Aquaculture development
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.117-126
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  • 84
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    An audit of sturgeon reproduction in Iran over the years 1998 -- 2002 (2018)
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Institutes in the north of the country are involved in the reproduction, culture and release of five species of sturgeon fingerlings into the Caspian Sea. The species are Acipenser persicus, A. guldenstadti, A. nudiventris and A. stellatus and Huso huso. Shahid Beheshti Fisheries Centre as the first commercial hatchery started its activities in 1972 in Rasht, Guilan Province of Iran. The centre achieved a production ceiling of 21.6 million fingerlings in 1997 and increased it to 24.5 million fingerlings in 1998. It is anticipated that the centre will achieve a threshold of 45 millions fingerlings in the next few years. During 1997-2002, the centre has increased its extent from 377 hectares to 887 hectares For Huso huso production, 17 specimens were caught in 1998, of which 10 were injected that produced 1.08 million fingerlings and in 2002, the number of caught and injected Huso huso were 29 and 21 respectively, that resulted in production and release of 2.4 million fingerlings. A number of 1062 A. persicus breeders were caught in 1998 of which 581 individuals were injected with hypophysis extract resulting in production and release of 22.5 million fingerlings. Of 538 injected individuals from among a total 802 breeder fish caught in 2002, a number of 12.3 million fingerlings were produced and released into the sea. The catch for Acipenser stellatus in 1998 was 193 breeders that produced 623000 fingerlings. In 2002, the catch increased to 290 breeders, of which 67 received injections to produce 1.3 million fingerlings. A total number of 0.67 million fingerlings of A. guldenstadti was produced in 1998 which was increased to 1.78 millions in 2002. For Acipenser nudiventris, the number of fingerlings produced in 1998 was 0.4 which was increased to 1.56 millions in 2002.
    Description: Published
    Keywords: Huso huso ; Acipencer persicus ; A. stellatus ; A. nudiventris ; A. guldenstadti ; Sturgeon fish ; Stock Enhancement ; Fingerlings ; Production ; Fisheries ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.97-112
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  • 85
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    Diet of Rutilus frisii kutum x Ctenopharyngodon idella hybrid (2018)
    Details
    Publication Date: 2021-05-19
    Description: This research project was carried out in Gulian Fisheries Research Center in 1998. For this purpose, two ponds were selected: Pond No. 1 with 450m2 area and pond No.2 with 250m2 area and then 3500 pieces/hectar of hybrids with 5-7g weight were added to the ponds. In order to determine their main food, they were fed by pelletes and grass according to their mean weight. Meanwhile, by adding mineral and organic fertilizers to the water, a suitable media including phytoplanktons, zooplanktons and benthoses were prepared for feeding of fishes. The stomach contents observations of 160 specimen of hybrids showed that this hybrid is a herbivorous fish and macrophytes were their main diet; and phytoplanktons could be considered as the secondary random food.
    Description: Published
    Keywords: Rutilus frisii kutum ; Grass Carp ; Hybrid ; Diet ; Fisheries ; Weight ; Fertilizer ; Phytoplanktons ; Zooplanktons ; Benthoses ; Specimens
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.31-42
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  • 86
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    The effect of fisheries activities on Spiny Lobster resources (2018)
    Details
    Publication Date: 2021-05-19
    Description: The commercial fishing of spiny lobster (Panulirus homarus) has been started since 1991 in Sistan-o-Baluchestan province with an annual catch 20-50 tons. In this paper, it has been tried to study the fishing pressure on this resources during 1st years. In this regard, the biometric data of 4 years consist of 1991, 1994, 1996 and 1997 were collected for further statistical analysis, These data are: total length, total height, carapace length, sex, maturity stages, fishing season and fishing ground. The analysis was done by using Foxpro and SPSS programs. The results of the mean height and mean weight of this species showed a decreasing trend from starting it should he the result of overfishing.
    Description: Published
    Keywords: Commercial ; Fisheries ; Spiny Lobster ; Fishing ; Panulirus homarus ; Length ; Height ; Sex ; Maturity ; Species ; Overfishing
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.49-60
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  • 87
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    Assessment of Fisheries Resource, Analysis of Fishing and Hunting Status in Hormozgan Province, 1992 (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fisheries ; Resource ; Fishing
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 101pp.
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  • 88
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    Rearing of Indian Craps fries to 1g weight in earthen ponds (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: 30000 juvenile Indian majour carps (Labeo Rohita,Cirhinus merigala, Catla catla) imported (2007 and 2008) and transferred to the earthen ponds in Astaneh Fisheries Research Station (Gilan ) and Sheiban Resaerch center (Khozestan) , In order to assess the viability of rearing fry up to 1 gram fingerlings under the climatic condition of north and south part of Iran . Growth parameters from the larval stage to 1 g were studied also .The fry with 300 mg weight, were released in to 3ponds.specimens were separated to tree experimental categories. fishes were fed with artificial food and also with the natural products of the ponds which were enriched with organic fertilizers, after being equally stocked in the ponds .During the experiment, oxygen level ,PH, turbidity, and temperature were measured . Monthly fry samples were taken, for weight and length biometrical analysis and also determination of the weight gain percentage, average daily growth rate, specific growth rate. Results have indicated adaptations and considerable growth in this species, with an increase from the initial weight of 300 mg to an average of 13.5±1.6 mg in 50 days period until the end of November for fingerlings.Catla was gain 1 g. during 15 day while Roho and Merigal were gain 1 g. during 14 and 10 days respectively. Results revealed that the Indian majour carps compatibility with the condition in Gilan province was succesfull and the combination of species and optimization of their compatibility specialy in other provinces like Sistan and Baluchestan were remind for futhre studies.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Indian carp ; Growth ; Labeo Rohita ; Cirhinus merigala ; Catla catla ; Juvenile ; Earthen ponds ; Fisheries ; Fry ; Fingerlings ; Artificial food ; Oxygen level ; Turbidity ; Fertilizers
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
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  • 89
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    Echoenvironmental survey on Fisheries site selection in the Guilan ,Mazadaran and Golestan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The lack of sustainable management programs has resulted in the drastic decline of sturgeons stocks in the Caspian Sea in the past two decades. Legal catch quotas for all Caspian littoral states has dropped from 28500 tons in 1985 to 460 tons in 2007 while caviar production in the Caspian Sea during the same period decreased from 3000 tons to 70 tons. Caviar production in the I.R. of Iran dropped from 305 tons in 1985 to about 11 tons in 2007. The "Strategic and applied research planning for sturgeon management and conservation" was developed with the collaboration of academicians from universities, researchers, experts, fishery authorities and representatives of the executive government to maintain sustainable development and rational management of sturgeon stocks in the Caspian Sea. The preparation and development of this planning was carried out through 121 sessions (2100 person hours) A comprehensive report (375 pg) was prepared which was divided into five volumes; Volume I comprises an introduction, objectives, strategies and planning, present status of production and caviar harvest, catch and export quotas, revenue generated and release of sturgeon fingerlings, Volume II comprises analysis of the problem by constructing a problem tree with 8 broad categories to analyze 344 problems and an objective tree which is the hierarchic flowchart of objectives with 9 broad categories with 241 items, Volume III comprises a review and analysis of previous and ongoing research (414 projects) on different aspects of sturgeon during the past 40 years, Volume IV comprises prioritizing research objectives outlined by the objective tree and finally Volume V which prioritizes primary objectives for 14 executive and 10 research programs. On the basis of the evaluation of the present status and for the sustainable development and rational management of sturgeon stocks a strategic and applied research planning program was proposed and developed within the framework of three primary objectives; 1) Management and sustainable use of Caspian Sea resources (5 programs), 2) Rehabilitation and restoration of stocks (5 programs), 3) Development of aquaculture (4 programs). The applied research program for each proposed executive program was outlined in 10 programs, 42 comprehensive plans and 222 projects. The primary objective on management and sustainable use of Caspian Sea resources includes 5 programs, 14 comprehensive plans and 63 projects, while the primary objective on rehabilitation and restoration of stocks includes 4 programs, 16 comprehensive plans and 87 projects. The primary objective to address sturgeon aquaculture includes 1 program, 12 comprehensive plans and 72 projects. The impacts and outcome of each of these programs was determined and presented. It is evident that if the present situation persists, the catch figures for adult sturgeon specimens and caviar production in Iran will reach zero in 2021. But if concerted efforts are taken and the proposed strategic and applied research planning program is executed (commencing from 2009) we can put a halt to these declining trends. By producing sturgeon fingerlings to restore population abundances, by conserving and protecting them in the Caspian Sea and by conducting applied research we can produce 206.4 tons of caviar by the year 2033. Apart from harvesting caviar from the Caspian Sea we can also annually produce 3000 tons sturgeon meat and 60 tons farmed caviar starting from the year 2023. The total budget proposed for implementation of this program for a period of 14 years (2008-2022) is USD 2483 million. If this budget is allocated in time and the proposed strategic program is properly and totally implemented, we can not only save many sturgeon populations from extinction but also ensure job opportunities for 6000 fisherman, provide 1480 new job opportunities and annually produce 266 tons of caviar which will generate USD 4957 million.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Sturgeons ; Caviar ; Strategic ; Fingerlings ; Survey ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 164pp.
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  • 90
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    Designing and establishment of ISO/IEC17025 in the research centers affiliated to IFRO The first phase: The Persian Gulf Ecological Research Center, Caspian Sea Ecology Research Center and Iran Shrimp Research Center (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The plan entitled "designing and establishment of ISO/IEC17025 in laboratories of three research centers affiliated to Iran Fisheries Research Organization" was carried out in the frame of three projects from March 2008 for about three years. Among the laboratories of The Persian Gulf ecological research center, the Caspian Sea ecological research center and the national shrimp research center 7, 5 and 3 laboratories were selected for accreditation, respectively. The quality manuals of the test laboratories were written following the requirements of ISO/IEC 17025. During the establishment of the system standardization of the test methods, calibration of the equipment, test methods validation and update and improvement of physical conditions of the laboratories were performed. The technical and quality management competence of the laboratories affiliated to the Persian Gulf ecological research center were evaluated by the auditors from DGA (the German Accreditation System for Testing Laboratories), which is signatory of ILAC (International Laboratory Accreditation Co-operation). But in the case of the two other centers, the laboratories were accredited by Iran Accreditation System (IAS). The laboratories officially accredited, after the successful completion of the accreditation process (including implementation of corrective actions for the detected non-conformities). Production of reliable results of the test methods from national and international scientific organizations' point of view as well as facilitation in development of bilateral and multilateral relations with them can be considered as the advantages of the system establishment. Moreover, exchange of the relevant scientific information and experiences among the researchers will be facilitated
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecological ; Physical ; ISO/IEC17025 ; Shrimp ; Standardization ; Laboratories ; Fisheries ; Iran Shrimp Research Center ; Caspian Sea Ecology Research Center ; Persian Gulf Ecological Research Center
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 30pp.
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  • 91
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    Planning and establishment of the laboratory information database system for Iranian fisheries research organization (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Due to lack of access to comprehensive and up-to-date information regarding equipment, personnel, laboratory services tariffs and chemicals in the laboratories of Iran Fisheries Research Institute and felt the necessity of having this information for optimal management of the laboratories, it was decided with regard to all information needs in this area and using previous experiences in this regard as well as the experiences of other institutions and related organizations at the national (and even international) level, the system would be designed. The main purpose of implementing this plan was to establish and implement a software system based on web technology to create a comprehensive database of the Fisheries Research Institute's laboratories, so that in addition to organizing information, using periodic reports on various related areas a more appropriate monitoring and management system could be applied. Fortunately, after the design and implementation stages, the system in early January 2011 was fully applicable. The main parts of this system include portal; database; advanced data entry, search and reporting capabilities; direct tests order system and discussion forums.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Laboratories ; Information Database System ; Fisheries ; Chemical ; Portal ; Iranian Fisheries Research Organization
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 38pp.
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  • 92
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    The fifth developing plan of Iranian Fisheries Research Institute (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Accurate scientific and practical plan for achieving the goals of the Islamic Republic of Iran within the framework of Vision development 1404 , is the infrastructure achieving sustainable development of the country . Order to achieve the above mentioned objectives and in order to the comprehensive development plans in the country, Iranian fisheries research organization adjust the fifth developing plan for support of executive related departments in country with mobilization a large number researchers consists of several working groups of ifro affiliated research centers . The fifth developing plan consist of three chapters for report of the forth developing plan and intrudction of research , construction plans and financial support (budjet) for period of 2011-2014 A.C .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fisheries ; Aquaculture ; IFRO ; Developing plans ; Fisheries research
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 144pp.
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  • 93
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    Recognation of fishes in rivers and basin of Qom (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was carried out on rivers, basins & qanat of Qom region during the 1376-1378and Fish samples were taken from 2 permanent rivers (Qomrood ,Ghara_chag)& from some seasonal ones (Tagharood, Zavarian, Vesva, Biraghan). Also local fishes was followed in 100 qanats in the region and Random fish sampling was done in permanent river extension out of province. This study aimed to recognize different fish species in the province water reservoir and estimating the fisheries potential in the province. For fish sampling nets such as mashk, salik, hook and hand tailored were used. Electroshoker was not used at all. Results of fish recognition showed that fish samples belong to 12 species & 4 family of "cyprinidae", "Balitoridae", "cyprinodontidae" and "poecilidae".The qanat fishes of the montain (kahak, Khagestan) and pastora area (Ghanavat,jafarabad) included by two families of "cyprinid", "Balitoridea".In some qanat which were connected to rivers more species of fish and anotherAquatic animal were observed & sampled.At the and map of geographical distribution of local fishes was planned.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Geographical ; Fish ; Samples ; Species ; Fisheries ; Electroshoker ; Cyprinidae ; Balitoridae ; Cyprinodontidae ; Poecilidae ; Aquatic ; Recognation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 67pp.
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  • 94
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    Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Some biological aspects of yellowfin and skipjack tuna according to catch data of traditional gillnet fisheries were studied in the north of Oman Sea during 1997-99. Based on Gonadosomatic Index (GSI) results, the spawning period or yellowfin begins in spring and reaches to the peak level in May-June. For skipjack tuna, in addition to the above mentioned spawning period, the other observed period was found in autumn-winter with a peak in January-February. The first length or maturity (LM50%) of yellowfin and skipjack tuna females were estimated 76 and 61 cm, respectively. Observation of stomach contents showed that squid was the major components of diet for yellowfin and fish for skipjack tuna. A comparison between mean length of different years and landing sites using two-way analysis of variance indicated a significant differences, The length-weight equations showed an algometric growth in tuna and isometric growth in skipjack.
    Description: Published
    Keywords: Biological ; Thunnus albacares ; Katsuwonus pelamis ; Skipjack tuna ; Yellowfin Tuna ; Gillnet ; Fisheries ; Gonadosomatic Index ; GSI ; Spawning ; Algometric growth ; Isometric growth ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.35-62
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  • 95
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    Investigation of morphometric and meristic characters of the Caspian Lamprey (Caspiomyzon wagneri) during migration season in Shirud and Talar Rivers (2018)
    Details
    Publication Date: 2021-05-19
    Description: We studied the morphological characteristics of the Caspian Lamprey (Caspiomyzon wagneri) in two rivers of Shirud and Talar during the spring migration in 2006. A total of 91 specimens were collected using hand and cast net. Relative morphometric characters including disc length, head depth, eye length, prebranchial length, head length, distance between disc and posterior end of the first dorsal fin, distance between disc and base of second dorsal fin, distance between disc and anus, post branchial length, tail length, interocular distance, and post ocular length showed significant differences between the two populations (P less than or equal to 0.05), but meristic characters showed no significant differences (P greater than or equal to 0.05). Although some of the relative morphometric characters showed differences between the two populations of the rivers, but the populations were not different based on the principal components analysis (PCA) and had a relatively high overlap.
    Description: Published
    Keywords: Meristic counts ; Rivers ; Lamprey ; Principal Component Analysis ; Bases ; Caspiomyzon wagneri ; Brackish ; Animal morphology ; Animal populations ; Fisheries ; Migration
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.147-162
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  • 96
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    A study on fishing status and some reproductive characteristics of Klunzinger’s mullet (Lize klunzingeri) in coastal waters of Khuzestan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Biological characteristics of Liza klunzingeri were studied in two coastal areas, Sajaphi and Bahrekan, of eastern Khuzestan during March to February 2007. Among total 1880 measured fish specimens, 947 specimens were analyzed. The mean value of Gonado-somatic Index (GSI) for the male and female fish were calculated as 0.96± 1.39 and 3.25 ± 3.26 respectively. The GSI value was highest in November and lowest in July. The mean value of condition factor (K) was 1.25± 0.14 in male and 1.21± 0.15 for female. The highest K value were observed in June and the lowest value in February. The lenght at first maturity regardless of sexuality, was found to be 14.5 cm and the time of spawning based on reproduction pattern were determined in Nov- Dec. The length-weight relationship were calculated as Y=0.024L^2.76 (n=226R2=0.72) for males, Y=0.011L^3.00 (n=444R2= 0.78) for females and Y=0.0208L^2.82 (n=670R2 =0.82) for total fishes and also it’s found significant in level lengthweight relationship in (P〈0.05). According to biological characteristics and referring to American fisheries society (AFS) indices and Fuzzy logic expert system, Lize klunzingeri is classified as low vulnerable species.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Lize klunzinger ; Gonado-somatic Index ; GSI ; Condition factor ; Biological characteristics ; Female ; Male ; Specimens ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 39pp.
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  • 97
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    The study of social and economic barriers, fisheries industry development in war-torn regions of Khuzestan (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Without Abstract.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fisheries ; Economic ; Barriers ; Industry development
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 220pp.
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  • 98
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    Stock assessment of sardine and anchovy in Hormuzgan province with emphasize on fisheries data (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Stock assessment of sardine and anchovy fishes in Persian Gulf and Oman Sea (Hormuzgan province) using fish population dynamics parameters and stock assessments models were carried out to estimate maximum sustainable yield (MSY) from 2010-2012. Results of 16 years (1996-2012) fisheries data analysis showed the mean of CPUE (catch/shooting) were calculated for Gill nets, Beach siene and Purse siene as 134, 988 and 2338 kg/shooting respectively. Relationships of catch and effort were determined for Qeshm area (R2=0.94) , Bandar Lengeh area (R2=0.51) and Jask area (R2=0.73) as a polynominal increasing model. Population dynamics parameters using monthly length frequency of 10540 sardine and 8232 anchovy by FiSAT II from Persian Gulf (Qeshm-Bandar Lengeh) and Oman Sea (Jask) fishing areas. Growth parameters K and L∞ of sadine (Sardinell sindensis) were estimated 1.18 y-1 and 19.1 cm in Persian Gulf and 1.11 y-1 and 19.1 cm in Oman Sea, and also for anchovy (Encrasicholina punctifer) were estimated 1.20 y-1 and 9.2 cm in Persian Gulf and 1.18 y-1 and 9.3 cm in Oman Sea. Anually, 5 cohorts for sardine and 2 cohorts for anchovy were estimated using Bhattacharya method in Persian Gulf and Oman Sea. Natural mortality (M) and fishing mortality (F) were estimated for this species, and exploitation rate of sardine were calculated as 0.58 and 0.44, and exploitation rate of anchovy were 0.54 and 0.34 in Persian Gulf and Oman Sea respectively. Length of catch (LC) were calculated 11 cm and 12 cm, and for anchovy 6.8 cm and 6.6 cm in Persian Gulf and Oman Sea respectively. Length – weight relationships of sardine and anchovy were calculated as isometric growth. Results of this study showed that populations of sardine and anchovy in Qeshm and Bandar Lengeh area are a single-unite stock, no enough evidence for discrimination of sardine and anchovy populations in Persian Gulf and Oman Sea. The mean anuall biomass of sardine and anchovy were estimated using Thompson and Bell model 190000 tones in Hormuzgan province. Maximum sustainable (MSY) of sardine and anchovy were estimated between 59721 and 98309 tones in this area. MSY of sardine were calculated 15222 and 3182 ton and MSY of anchovy were 36237 ton and 5080 ton , for minimum of estimated MSY in Persian Gulf ( Bandar Lenghe-Qeshm) and Oman Sea (Jask) respectively. Using yield per recruit of Beverton and Holt model , F0.1 were estimated averagely 1.75 for sardine and anchovy in Hormuzgan province and its showed the underfishing condition. Survey of catch and efforts trend in sardine and anchovy, defined development phase of small pelagic fisheries in Hormuzgan province.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Sardine ; Anchovy ; MSY ; CPUE ; Population dynamics ; Stock assessment ; Gill nets ; Growth ; Mortality ; Species ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 124pp.
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  • 99
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    The role of the south pacific commission in the development of small-scale fisheries (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Without abstract.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Role ; Commission ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 24pp.
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  • 100
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    Limnological survey about brakish water pond culture of rainbow trout (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Limnological factors of brackish water pounds of the rainbow trout, Onchorhynchus mykiss were studied at Bafgh region in Yazd province. Physicochemical factors, phytoplankton, zooplankton and benthic populations of pools, supply and drainage channels from different farms were studied in aquaculture cycle in 2002 and 2003. Means were compared using Tukey HSD and t tests. Meanings of factors in 2002 and 2003 were respectively: and 9.3 0.2ppt; dissolved oxygen 7.9 0.2mg/l water temperature 13.8 0.3°c and 14.9 0.6°c; salinity 12.3 0.2ppt and 7.2 0.1mg/l; pH between 7.8 to 9.2 and 8.1 to 9.5; depth of hyalinity 0.85 0.1m and 1.1 0.1m; ammonium 0.1-0.5mg/l; and nitrate 1.8-21mg/l. Main phytoplankton were diatoms specially Chaetoceros, and Cyanophyta. Rotifera were the dominant zooplankton. Benthic fauna mainly included immature Chironomids. Final mean lengths were between 24.7cm to 31.5cm, mean weights between 11179.9gr to 434.6gr. FCR between 1.16 to 1.6; DGR between 1.04gr/day to 3.03gr/day; production 0.03kg/m2 to 0.84 kg/m2. Supply channels had the optimum limnological condition for trout aquaculture. Limnological factors were often not significantly different between pools and drainage channels. Saeeid and Rangin-Kaman farms were the most successful farms.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Limnology ; Brackish water ; Onchorhynchus mykiss ; Rainbow trout ; Phytoplankton ; Zooplankton ; Chaetoceros ; Survey ; Pond culture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 175pp.
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