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  • Springer  (39,331)
  • Wiley  (21,575)
  • 2020-2020
  • 2005-2009  (58,448)
  • 1945-1949  (2,458)
  • 2005  (58,448)
  • 1946  (2,458)
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  • 2020-2020
  • 2005-2009  (58,448)
  • 1945-1949  (2,458)
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  • 1
    Unknown
    New York : Springer
    Keywords: Computer engineering. ; Computer security. ; Electronic data processing, Distributed processing.
    Pages: xx, 239 p.
    ISBN: 0-387-23917-0
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  • 2
    Publication Date: 2020-11-23
    Description: Abstract: The simultaneous solution of the Planck equation (involving the widely used “dual-band” technique) using two shortwave infrared (SWIR) bands allows for an estimate of the fractional area of the hottest part of an active lava flow (fh), and the background temperature of the cooler crust (Tc). The use of a high spectral and spatial resolution imaging spectrometer with a wide dynamic range of 15 bits (DAIS 7915) in the wavelength range from 0.501 to 12.67 µm resulted in the identification of crustal temperature and fractional areas for an intra-crater hot spot at Mount Etna, Italy. This study indicates the existence of a relationship between these Tc and fh extracted from DAIS and Landsat TM data. When the dual band equation system is performed on a lava flow, a logarithmic distribution is obtained from a plot of the fractional area of the hottest temperature versus the temperature of the cooler crust. An entirely different distribution is obtained over active degassing vents, where increases in Tc occur without any increase in fh. This result indicates that we can use scatter plots of Tc vs. fh to discriminate between different types of volcanic activity, in this case between degassing vents and lava flows, using satellite thermal data.
    Description: Published
    Description: 641–651
    Description: 4V. Processi pre-eruttivi
    Description: JCR Journal
    Description: open
    Keywords: Mount Etna ; remote-sensing ; lava-flow ; degassing vent ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2021-03-01
    Description: On September 6, 2002, aML =5.6 earthquake, occurring some tens of kilometres offshore from the Northern Sicilian coast (Southern Tyrrhenian Sea), slightly damaged the city of Palermo and surroundings (degree 6 in the European Macroseismic Scale 1998). The macroseismic investigation of the shock and a detailed study of effects of the main earthquakes which affected Palermo in the past have been performed in order to evaluate the seismic response of the city. Moreover, the comparison of the recent event, which is instrumentally constrained, with historical earthquakes allows us to infer new insights on the seismogenic sources of the area, that seem located offshore in the Tyrrhenian sea. In the last 500 years, Palermo has never been completely destroyed but has suffered effects estimated between intensities 6 and 8 EMS-98 many times (1693, 1726, 1751, 1823, 1940, 1968, 2002). The damage scenarios of the analysed events have shown that damage distribution is strongly conditioned by soil response in the different parts of the city and by a high building vulnerability, mainly in the historical centre and in the south-eastern zone of the modern city. As a matter of fact, Palermo has always suffered greater effects than those reported for other nearby localities. The hazard assessment obtained using observed site intensities has shown that the probability of occurrence for intensity 8 (the strongest intensity observed in Palermo) exceeds 99% for 550 years, while the estimated mean return period is 152 ± 40 years. These results, in connection with building vulnerability due to the urban expansion before the introduction of seismic code, suggest that the city is exposed to a relatively high seismic risk.
    Description: Published
    Description: 525-543
    Description: partially_open
    Keywords: intensity ; damage ; earthquakes ; Italy ; macroseismics ; Palermo ; seismic hazard ; vulnerability ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2018-12-07
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
    Publication Date: 2017-04-03
    Description: We compare the results obtained from the modelling of EDM, GPS, levelling and tilt data measured in the first part of the 19911993 eruption at Etna to the InSAR data acquired during the second part. The geodetic changes are very marked in the first half of the eruption and constrain a deflation source located at a few kilometers of depth ( 3 km b.s.l.), in agreement with other independent geophysical evidence. SAR data, available during the second part of the eruption, were analysed for different time intervals in the second part of the eruption. The interpretation of SAR interferograms reveals a large-scale but less marked deflation of the volcano that could be caused by a deeper source. This second source is in accord with a second deeper anomaly revealed by recent seismic investigations. The combination of geodetic data modelling and SAR images suggests a complex plumbing system composed at least of two possible storage regions located at different depths.
    Description: Published
    Description: 1345-1357
    Description: partially_open
    Keywords: Geodesy ; SAR Interferometry ; ground deformation ; Mt. Etna volcano ; 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring ; 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy ; 04. Solid Earth::04.03. Geodesy::04.03.09. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 6
    Publication Date: 2017-04-04
    Description: Analysis of the historical records of Etnas eruptive activity for the past three centuries shows that, after the large 1669 eruption, a period of about 60 years of low-level activity followed. Starting from 1727, explosive activity (strombolian, lava fountaining and subplinian) at the summit crater increased exponentially to the present day. Since 1763, the frequency of flank eruptions also increased and this value remained high until 1960; afterward it further increased sharply. In fact, the number of summit and flank eruptions between 1961 and 2003 was four times greater than that of the pre-1960 period. This long-term trend of escalating activity rules out a pattern of cyclic behaviour of the volcano. We propose instead that the 16702003 period most likely characterises a single eruptive cycle which began after the large 1669 eruption and which is still continuing. On the basis of the eruptive style, two distinct types of flank eruptions are recognised: Class A and Class B. Class A eruptions are mostly effusive with associated weak strombolian activity; Class B eruptions are characterised by effusive activity accompanied by intense, long-lasting, strombolian and lava fountaining activity that produces copious tephra fallouts, as during the 2001 and 20022003 eruptions. Over the past three centuries, seven Class B eruptions have taken place with vents located mainly on the south-eastern flank, indicating that this sector of the volcano is a preferential zone for the intrusion of volatile-rich magma rising from the deeper region of the Etna plumbing system.
    Description: Published
    Description: 732-742
    Description: partially_open
    Keywords: Etna ; Historical record ; Summit activity ; Flank eruptions ; Eruptive behaviour ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 7
    Publication Date: 2017-04-04
    Description: The Monte Nuovo eruption is the most recent event that occurred at Phlegrean Fields (Italy) and lasted from 29 September to 6 October 1538. It was characterized by 2 days of quasi-sustained phreatomagmatic activity generating pumice-bearing pyroclastic density currents and forming a 130-m-high tuff cone (Lower Member deposits). The activity resumed after a pause of 2 days with two discrete Vulcanian explosions that emplaced radially distributed, scoria-bearing pyroclastic flows (Upper Member deposits). The juvenile products of Lower and Upper Members are, respectively, phenocryst-poor, light-coloured pumice and dark scoria fragments with K-phonolitic bulk compositions, identical in terms of both major and trace elements. Groundmass is formed by variable proportions of K-feldspar and glass, along with minor sodalite and Fe-Ti oxide present in the most crystallized samples. Investigations of groundmass compositions and textures were performed to assess the mechanisms of magma ascent, degassing and fragmentation along the conduit and implications for the eruptive dynamics. In pumice of the Lower Member groundmass crystal content increases from 13 to 28 vol% from the base to the top of the sequence. Products of the Upper Member consist of clasts with a groundmass crystal content between 30 and 40 vol% and of totally crystallized fragments. Crystal size distributions of groundmass feldspars shift from a single population at the base of the Lower Member to a double population in the remaining part of the sequence. The average size of both populations regularly increases from the Lower to the Upper Member. Crystal number density increases by two orders of magnitude from the Lower to the Upper Member, suggesting that nucleation dominated during the second phase of the eruption. The overall morphological, compositional and textural data suggest that the juvenile components of the Monte Nuovo eruption are likely to record variations of the magma properties within the conduit. The different textures of pumice clasts from the Lower Member possibly reflect horizontal gradients of the physical properties (P, T) of the ascending magma column, while scoriae from the second phase are thought to result from the disruption of a slowly rising plug crystallizing in response to degassing. In particular, crystal size distribution data point to syn-eruptive degassing-induced crystallization as responsible for the transition in eruptive style from the first to the second phase of the eruption. This mechanism not only has been proved to profoundly affect the dynamics of dome-forming calc-alkaline eruptions, but may also have a strong influence in driving the eruption dynamics of alkaline magmas of intermediate to evolved compositions.
    Description: Published
    Description: 601-621
    Description: reserved
    Keywords: Phlegrean Fields ; Vulcanian explosion ; Degassing ; Groundmass crystallization ; Eruption dynamics ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases ; 04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 8
    Publication Date: 2017-04-04
    Description: In this work we present seismological and ground deformation evidence for the phase preparing the July 18 to August 9, 2001 flank eruption at Etna. The analysis performed, through data from the permanent seismic and ground deformation networks, highlighted a strong relationship between seismic strain release at depth and surface deformation. This joint analysis provided strong constraints on the magma rising mechanisms. We show that in the last ten years, after the 1991–1993 eruption, an overall accumulation of tension has affected the volcano. Then we investigate the months preceding the 2001 eruption. In particular, we analyse the strong seismic swarm on April 20–24, 2001, comprising more than 200 events (Mmax = 3.6) with prevalent dextral shear fault mechanisms in the western flank. The swarm showed a ca. NE-SW earthquake alignment which, in agreement with previous cases, can be interpreted as the response of the medium to an intrusive process along the approximately NNW-SSE volcano-genetic trend. These mechanisms, leading to the July 18 to August 9, 2001 flank eruption, are analogous to ones observed some months before the 1991–1993 flank eruption and, more recently, in January 1998 before the February-November 1999 summit eruption.
    Description: Published
    Description: 1469-1487
    Description: partially_open
    Keywords: Ground deformation ; volcano seismology ; Mt. Etna Volcano ; intrusive mechanism ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 9
    Publication Date: 2017-04-04
    Description: Ground deformation occurring on the southern flank of Mt Etna volcano during the JulyAugust 2001 eruption was monitored by GPS measurements along an EW profile crossing the fissure system. This profile was measured eight times during the eruption, using the 'stop and go' semi-kinematic technique. Horizontal and vertical displacements between GPS surveys are reported for each station. The most significant event is a deformation episode occurring during the first week of the eruption, between 2527 July. Displacements were measured on benchmarks close to the eruptive fissure and the tensile 1989 fracture. Data inversions for measured displacements were performed using the Okada model. The model shows the narrowing of the 2001 dyke accompanied by a dextral dislocation along an east-dipping fault, parallel to the 1989 fracture.
    Description: Published
    Description: 336-341
    Description: partially_open
    Keywords: GPS ; Ground deformation ; Modelling ; Volcano monitoring ; 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy ; 04. Solid Earth::04.03. Geodesy::04.03.09. Instruments and techniques ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 10
    Publication Date: 2017-04-04
    Description: The 200203 Mt Etna flank eruption began on 26 October 2002 and finished on 28 January 2003, after three months of continuous explosive activity and discontinuous lava flow output. The eruption involved the opening of eruptive fissures on the NE and S flanks of the volcano, with lava flow output and fire fountaining until 5 November. After this date, the eruption continued exclusively on the S flank, with continuous explosive activity and lava flows active between 13 November and 28 January 2003. Multi-disciplinary data collected during the eruption (petrology, analyses of ash components, gas geochemistry, field surveys, thermal mapping and structural surveys) allowed us to analyse the dynamics of the eruption. The eruption was triggered either by (i) accumulation and eventual ascent of magma from depth or (ii) depressurisation of the edifice due to spreading of the eastern flank of the volcano. The extraordinary explosivity makes the 200203 eruption a unique event in the last 300 years, comparable only with La Montagnola 1763 and the 2001 Lower Vents eruptions. A notable feature of the eruption was also the simultaneous effusion of lavas with different composition and emplacement features. Magma erupted from the NE fissure represented the partially degassed magma fraction normally residing within the central conduits and the shallow plumbing system. The magma that erupted from the S fissure was the relatively undegassed, volatile-rich, buoyant fraction which drained the deep feeding system, bypassing the central conduits. This is typical of most Etnean eccentric eruptions. We believe that there is a high probability that Mount Etna has entered a new eruptive phase, with magma being supplied to a deep reservoir independent from the central conduit, that could periodically produce sufficient overpressure to propagate a dyke to the surface and generate further flank eruptions.
    Description: Published
    Description: 314-330
    Description: partially_open
    Keywords: Multi-disciplinary study ; Mount Etna ; 2002–03 eruption ; Eccentric eruptions ; Flank activity ; Etna feeding system ; Volcanic processes ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 11
    Publication Date: 2017-04-04
    Description: An anisotropic attenuation law, based on an anisotropic characterization of intensity distribution for seismogenic zones, is proposed. This approach, that distinguishes itself for its consistency to the observed data, initially reconfigured by filtering procedures, is particularly suitable for seismic hazard evaluation.
    Description: Published
    Description: 707-714
    Description: partially_open
    Keywords: Attenuation law ; virtual intensity distribution ; seismic hazard ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 12
    Publication Date: 2017-04-04
    Description: A modelling of the observed macroseismic intensity of historical and instrumental earthquakes in southern Spain is proposed, with the aim of determining the macroseismic parameters for seismic hazard evaluation in a region in which the characterization of intensity distribution of seismic events shows different levels of difficulty referable to the complex faults system of the area in study. The adopted procedure allows an analytical determination of epicenters and principal attenuation directions of earthquakes with a double level of verification with reference to the maximum shaking area and structural lineaments of the region, respectively. The analyses, carried out on a suitable number of events, highlight, therefore, some elements for a preliminary characterization of a seismic zonation on the basis of the consistency between seismic intensity distribution of earthquakes and corresponding structural framework.
    Description: Published
    Description: 747-760
    Description: partially_open
    Keywords: Attenuation directions ; southern Spain ; macroseismic intensity ; virtual intensity ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 13
    Publication Date: 2017-04-04
    Description: Flank instability and collapse are observed at many volcanoes. Among these, Mt. Etna is characterized by the spreading of its eastern and southern flanks. The eastern spreading area is bordered to the north by the EW-trending Pernicana Fault System (PFS). During the 20022003 Etna eruption, ground fracturing along the PFS migrated eastward from the NE Rift, to as far as the 18 km distant coastline. The deformation consisted of dextral en-echelon segments, with sinistral and normal kinematics. Both of these components of displacement were one order of magnitude larger (~1 m) in the western, previously known, portion of the PFS with respect to the newly surveyed (~9 km long) eastern section (~0.1 m). This eastern section is located along a pre-existing, but previously unknown, fault, where displaced man-made structures give overall slip rates (11.9 cm/year), only slightly lower than those calculated for the western portion (1.42.3 cm/year). After an initial rapid motion during the first days of the 20022003 eruption, movement of the western portion of the PFS decreased dramatically, while parts of the eastern portion continued to move. These data suggest a model of spreading of the eastern flank of Etna along the PFS, characterized by eruptions along the NE Rift, instantaneous, short-lived, meter-scale displacements along the western PFS and more long-lived centimeter-scale displacements along the eastern PFS. The surface deformation then migrated southwards, reactivating, one after the other, the NNWSSE-trending Timpe and Trecastagni faults, with displacements of ~0.1 and ~0.04 m, respectively. These structures, along with the PFS, mark the boundaries of two adjacent blocks, moving at different times and rates. The new extent of the PFS and previous activity over its full length indicate that the sliding eastern flank extends well below the Ionian Sea. The clustering of seismic activity above 4 km b.s.l. during the eruption suggests a deep décollement for the moving mass. The collected data thus suggests a significant movement (volume 〉1,100 km3) of the eastern flank of Etna, both on-shore and off-shore.
    Description: Published
    Description: 417-430
    Description: partially_open
    Keywords: Volcano spreading ; Fracturing ; Mt. Etna ; Pernicana Fault System ; NE Rift ; 04. Solid Earth::04.04. Geology::04.04.09. Structural geology ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions ; 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 14
    Publication Date: 2017-04-04
    Description: We have characterized pumice products belonging to the climactic phase of the 800-year-b.p. Quilotoa eruption. Bulk rock compositions, petrography, mineral, and glass chemistry and textural investigations were performed on the three end-member pumice types, namely white, gray, and mingled pumices. All the investigated pumice clasts are dacites characterized by the same bulk rock composition and mineralogical assemblage, but glass compositions and bulk textures change according to different pumice types. White pumice has higher crystallinity (~48 wt%), abundant euhedral pheno/microphenocrysts, no groundmass microlites, the most evolved glass compositions (7478 wt% SiO2), and heterogeneous vesicle populations marked by deformed and highly coalesced vesicles with thin walls. Gray pumice exhibits lower crystallinity (2936 wt%), abundant broken and/or resorbed crystals, ubiquitous groundmass phenocryst fragments and microlites, the widest range of glass compositions (6978 wt% SiO2), and quite homogeneous poorly deformed and coalesced vesicles with thicker walls. Mingled pumices are characterized by the alternation of bands or patches with white and gray pumice compositional and textural characteristics. We attribute heterogeneities in glass compositions and crystal and vesicle textures to processes occurring within volcanic conduits as magma is ascending to the surface. In particular, the above observations and results are consistent with an origin of a gray magma by heating of the original white magma in a strongly sheared region of the conduit because of a mechanism of viscous dissipation and crystal grinding and resorption at the conduit walls. The less viscous gray magma, therefore, would enable the onset and preservation of a high mass flux of the eruption otherwise difficult to explain for highly viscous crystal-rich dacitic magmas.
    Description: Published
    Description: 307-321
    Description: partially_open
    Keywords: Plinian eruption ; Crystal-rich magma ; Crystal grinding ; Pumice types ; Viscous dissipation ; 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas ; 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 15
    Publication Date: 2017-04-04
    Description: The anisotropic modelling of intensity distribution, affected by the construction of macroseismic planes, allows an analysis of the influence of each point of observed intensity on the analytical determination of epicenter and of the principal attenuation directions. Such a procedure is a vital aid in the cases in which the observed intensity points, that, for location or joined intensity level, are not consistent with an anisotropic model of intensity attenuation. A suitable filtering on intensity levels associated with the points of the intensity map, for a better modelling of observed intensity distribution, is proposed with the aim of a better seismic hazard evaluation
    Description: Published
    Description: 683-697
    Description: partially_open
    Keywords: Macroseismicity ; observed intensity filtering ; macroseismic planes ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 16
    Publication Date: 2017-04-04
    Description: This paper shows the results of a detailed reprocessing of aeromagnetic data,obtained by the downward projection to the seabed. The area of interest is centered over the Tyrrhenian Basin,whose bathymetric –topographic lay-out is characterized by a somewhat irregular trend.The origin of the intense depth variations depends on the Tyrrhenian structural setting,that is associated with the presence of several tectonic lineaments,seamounts or volcanic islands.The data were characterized by good quality and dense sam- pling,but they have been reprocessed in order either to solve some problems in the original compilation,and to reduce the distor- tion of the geomagnetic anomaly field caused by the difference of distance between the survey level and the magnetic source.The reprocessed magnetic map is proposed as an e ffective analysis tool for the Tyrrhenian area that is characterized by high susceptibility lithotypes.Downward projection of the aeromagnetic data by BTM algorithm increases the de finition of the anomalous magnetic signal without distortions in the geometric pattern of the field,thus showing a more stable and effective association between the magnetic anomalies and their geological sources.This effect is particularly true for high frequency anomalies that are directly comparable after the topographic projection because the depth filtering effect is attenuated.Moreover,the BTM method has been applied for the first time to a regional scale survey that shows substantial advantages because no fictitious anomalies in the high frequency sector of the spectrum were generated.This has been a typical effect of the traditional downward projection methods widely used before.The final result is a BTM anomaly map that is able to show the structural connections between the geological magnetic sources of the Tyrrhenian Sea area.
    Description: Published
    Description: 265-277
    Description: reserved
    Keywords: Potential methods,marine geomagnetism,downward continuation,Tyrrhenian Sea ; 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods
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  • 17
    Publication Date: 2019-07-17
    Description: A continuous high-resolution record of digital images has been obtained from the North Greenland Ice Core Project (NorthGRIP) ice core (75.1N, 42.3W) in the depth interval from 1330 m to the bedrock at 3085 m. The ice core stratigraphy is clearly visible throughout the glacial period with the most frequent and brightest visible layers appearing during the coldest events. Down to a depth of 2600 m the horizontal layeringis very regular; below this depth, small irregularities in the layering start to appear, and below 2800 m the visual stratigraphy becomes more uncertain, perhaps because of penetration into climatically warmer ice. Comparison of the visual stratigraphy with high-resolution continuous records of chemical impurities and dust reveals a high degree of correlation, which indicates that the visible layers are caused by these impurities. Anew approach is used to automatically determine annual layer thicknesses from the visual stratigraphy record by carrying out a frequency analysis of the most prominent visible layers in the profile. The result gives strong support for the NorthGRIP timescale model.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 18
    Publication Date: 2021-05-19
    Description: 1. Seahorses (Hippocampus spp.), many of which are listed as Vulnerable or Endangered on the IUCN Red List, are traded worldwide as souvenirs, aquarium fish and, primarily, for use in traditional medicines. Given concern over the sustainability of this trade, the genus was added to Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) in May 2004. 2. This paper reports findings of the first ever survey of seahorse trade in Africa, conducted in Kenya and Tanzania in May and June 2000. 3. Seahorse trade in Kenya was found to be negligible, with approximately 10 live seahorses exported as aquarium fish annually. Until 1998, however, Kenya may have imported somewhere from 1 to 2.3 t of dried seahorses annually from Tanzania for re-export to Asian medicine markets. Seahorse trade in Tanzania remained substantial, with at least 630–930 kg of dried seahorse exported directly to Asia each year. 4. Accounts of declines in seahorse availability and seahorse size, although few in number, could be early warning signs that wild populations are suffering, at least locally. Close monitoring of future developments in the trade will be essential to allow for timely conservation action as and when necessary, and would contribute to our understanding of the ecological and economical implications of small-scale, non-food fisheries. Copyright # 2004 John Wiley & Sons, Ltd.
    Description: Published
    Keywords: Hippocampus spp ; By catch ; Non-food fisheries ; Seahorse trade ; Endangered species ; Aquatic animals
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 19
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    Springer
    In:  International Association of Geodesy Symposia
    Publication Date: 2020-02-12
    Description: The lAG International Symposium on Gravity, Geoid, and Space Missions 2004 (GGSM2004) was lield in the beautiful city of Porto, Portugal, from 30 August to 3 September 2004. This symposium encompassed the themes of Commission 2 (Gravity Field) of the newly structured lAG, as well as interdisciplinary topics related to geoid and gravity modeling, with special attention given to the current and planned gravi- dedicated satellite missions. The symposium also followed in the tradition of mid-term meetings that were held between the quadrennial joint meetings of the International Geoid and Gravity Commissions. The previous mid-term meetings were the International Symposia on Gravity, Geoid, and Marine Geodesy (Tokyo, 1996), and Gravity, Geoid, and Geodynamics (Banff, 2000). GGSM2004 aimed to bring together scientists from different areas in the geosciences, working with gravity and geoid related problems, both from the theoretical and practical points of view. Topics of interest included the integration of heterogeneous data and contributions from satellite and airborne techniques to the study of the spatial and temporal variations of the gravity field. In addition to the special focus on the CHAMP, GRACE, and GOCE satellite missions, attention was also directed toward projects addressing topographic and ice field mapping using SAR, LIDAR, and laser altimetry, as well as missions and studies related to planetary geodesy.
    Language: English
    Type: info:eu-repo/semantics/book
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  • 20
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/book
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    Acta biotheoretica 8 (1946), S. 67-76 
    ISSN: 1572-8358
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    Acta biotheoretica 8 (1946), S. 42-59 
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    Acta biotheoretica 8 (1946), S. 18-41 
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    Acta biotheoretica 8 (1946), S. 1-17 
    ISSN: 1572-8358
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    Topics: Biology
    Description / Table of Contents: Summary While refuting the standpoint taken byCharles Richet (that the identical phenomena do not occur in nature at all) and simultaneously setting aside the contrary view ofEmil Meyerson (that the very essence of our scientific thinking and method of deductions consists of the process of logical identification, proceeding from the complex and heterogeneous to the simple and homogenous, more and more diminishing particles), the author argues that in biology the perfectly identical creatures, features or phenomena must occur, so to say by virtue of mathematical necessity, if the inheritance of features through the course of sexual propagation, governed by the laws ofMendel, is proceeding according to the rules ofNewton's binomial. Then the expanded series of the latter brings us the expression of some sort of biological multiplication, which — in their successive terms — leads to the origin of natural groups of so called binomions (the notion introduced by the author in his previous papers, 1942 aetc., which he is referring to), each of which being composed of identical individuals, appearing in the exactly definite frequencies, issuing from the very procedure of multiplication of the factors, partaking in those series in any given term. Again, the possibility of ascertaining the eventual, if any, individualising differencies (deviations) in the identical so originated beings is explained by the author as being actually due to the gradual deepening of our diagnosing analysis, by the use of which the more and more minute units, material or energetic ones, are introduced. Finally, referring to the few, mostly incidentally chosen, examples taken from astronomy, chemistry, embryology, anthropology, sociology, logic and philosophy, the author calls the attention to the fact that the modern science shows a general tendency towards the foundation of its conclusions on the interaction of factors and on the use of the general “principle of complexity” (ofMalfitano andHonnelaitre) as an obligatory course of very scientific methodology.
    Notes: Zusammenfassung Gegenüber den Ansichten vonCharles Richet (dass es in der Natur überhaupt keine identische Gebilde geben könne), sowie auch die gegensätzliche, die von E.Meyerson (dass unseres Denkvermögen und methodologische Schlussziehung eben nur einen einzig möglichen Prozess der ständigen Identifizierung, die vom Komplexen und Heterogenen zum Elementaren und Homogenen in den Strukturen der immer mehr und mehr sich verkleinernden Partikeln fortschreitet, darstellen sollen), bei Seite lassend, hebt der Verfasser hervor, dass gerade auf dem Gebiete der Biologie vollständig identische Gebilde, Merkmale oder Erscheinungen, so zu sagen mit mathematischer Notwendigkeit, auftreten müssen, falls die Verterbung der Merkmale, die sich auf dem Wege der geschlechtlichen Fortpflanzung abspielt und derMendel-Gesetzen unterworfen ist, auf das Verfahren desNewton'schen Binoms zurückzuführen ist. Die entwickelte Reihe dieses letzteren — in deren Gliedern vertreten — stellt dann ein zusammengesetztes Beispiel einer eigenartigen biologischen Multiplizierung dar, die die Entstehung der natürlichen homogenen Gruppen von sogenannten Binomionen (— der Begriff in früheren Arbeiten des Verfassers, 1942 a, eingeführt —) verursacht. Jede einzelne derselben setz sich bekanntlich aus vollständig identischen Individuen zusammen, die in durch die binomische Regel festgesetzten, genau bestimmten Häufigkeiten auftreten und lauter aus dem Verfahren der Multiplizierung der teilnehmenden Elementen (als Factoren oder Multiplikatoren gedeutet) in allen gegebenen Gliedern jeder beliebigen Reihe herrühren können. Die eventuelle Entstehung etwaiger kleinsten individuellen Differenzen (Variationen) in auf solche Weise entstandenen vollständig identischen Gebilden ist als Folge der allmählichen Vertiefung unseres Erkenntnissverfahrens, bzw. diagnostischer Analyse zu deuten, in welcher mit immer kleiner und kleiner werdenden — materiellen oder energetischen — Einheiten gearbeitet wird. Zum Schluss, sich auf wenige hauptsächlich beiläufig ausgewählte Beispiele aus den Gebieten der Astronomie, der Chemie, der Embryologie, der Anthropologie, der Soziologie, der Logik und der Philosophie stützend, sucht der Verfasser zu beweisen, dass in der modernen Wissenschaft überhaupt eine allgemeine Tendenz herrscht die Schlüsse auf die Wechselwirkung der Factoren, bzw. auf den Prinzip der Komplexität (lautMalfitano undHonnelaitre), als einer grundsetzlichen Eigenschaft jeder wissenschaftlichen Methode, zurückzuführen.
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    Acta biotheoretica 8 (1946), S. 60-66 
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  • 26
    ISSN: 1434-601X
    Keywords: 27.50.+e 59 ⩽ A ⩽ 89 ; 23.40.-s β decay; double β decay; electron and muon capture ; 21.60.Cs Shell model
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    Topics: Physics
    Notes: Abstract. The neutron-rich nuclei          2157, 58Sc,          2258-60Ti,          2360-63V,          2462-66Cr have been produced at Ganil via interactions of a 61.8A MeV 76Ge beam with a 58Ni target. Beta-decay studies have been performed using combined β- and γ-ray spectroscopy. Half-lives have been determined and β-decay schemes are proposed for 58Ti, 61V and 62Cr. From these studies, new hints for the existence of β-decaying isomers in 60V and in 62Mn are provided. These results are compared to shell model calculations. The role of the πf7/2- νf5/2 proton-neutron interaction is examined through its influence on the lifetime values.
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    ISSN: 1434-601X
    Keywords: 28.41.Kw Radioactive wastes, waste disposal ; 29.30.Kv X- and γ-ray spectroscopy ; 02.70.Uu Applications of Monte Carlo methods ; 07.05.Fb Design of experiments
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    Notes: Abstract. The gamma-ray spectra emitted by decaying of residual nuclei produced by spallation neutrons in (n, xn), (n, xnyp), (n, p), (n, γ) reactions with activation threshold detectors, i.e. 209Bi, 197Au, 59Co, 115In, 232Th, were measured in the Laboratory of Nuclear Problems (LNP), JINR, Dubna, Russia. Spallation neutrons were generated by bombarding a 20 cm long cylindrical lead target with 8 cm diameter surrounded by a 6 cm thick layer of paraffin moderator with 1 GeV proton beam from the NUCLOTRON accelerator. Reaction rates and a spallation neutron spectrum were measured and compared with CASCADE code calculations.
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    ISSN: 1434-601X
    Keywords: 21.60.Gx Cluster models ; 23.90.+w Other topics in radioactive decay and in-beam spectroscopy ; 25.70.Gh Compound nucleus ; 25.70.Pq Multifragment emission and correlations
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    Notes: Abstract. We have studied the emission of light unbound clusters, 8Be and 12C * (0+2), in the reactions 18O + 13C →{31} Si →{23} Ne + 8Be and 28Si + 24Mg →{52} Fe →{40} Ca + 12C * (0+2). The γ-ray spectra obtained in coincidence with 8Be and 12C * (0+2) emission have been studied relative to the statistical emission of two or three α-particles. The angular-momentum-to-energy balance of the cluster emission is compared with that of multiple-α emission. The properties of the energy spectra of the binary process and the population of the residual nuclei by cluster emission are discussed. It is observed that cluster emission carries away less excitation energy on average than the sequential emission of the individual components.
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  • 29
    ISSN: 1434-601X
    Keywords: 11.10.Ef Lagrangian and Hamiltonian approach ; 11.55.Ds Exact S matrices ; 13.75.Gx Pion-baryon interactions ; 36.10.-k Exotic atoms and molecules (containing mesons, muons, and other unusual particles)
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    Notes: Abstract. We study kaonic deuterium, the bound K-d state AK d. Within a quantum field-theoretic and relativistic covariant approach we derive the energy level displacement of the ground state of kaonic deuterium in terms of the amplitude of K-d scattering for arbitrary relative momenta. Near threshold our formula reduces to the well-known DGBT formula. The S-wave amplitude of K-d scattering near threshold is defined by the resonances Λ(1405), Σ(1750) and a smooth elastic background, and the inelastic channels K-d → NY and K-d → NYπ, where Y = Σ±,Σ{0} and Λ{0}, where the final-state interactions play an important role. The Ericson-Weise formula for the S-wave scattering length of K-d scattering is derived. The total width of the energy level of the ground state of kaonic deuterium is estimated using the theoretical predictions of the partial widths of the two-body decays AKd → NY and experimental data on the rates of the NY pair production in the reactions K-d → NY. We obtain Γ{1s} = (630±100)eV. For the shift of the energy level of the ground state of kaonic deuterium we predict ε{1s} = (325±60)eV.
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    The European physical journal 23 (2005), S. 129-133 
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    Keywords: 13.25.Gv Decays of J/ψ, ϒ, and other quarkonia ; 12.39.Jh Nonrelativistic quark model ; 14.20.Jn Hyperons
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    Topics: Physics
    Notes: Abstract. A simple quark pair creation model is introduced to study exclusive decays of χ{c_J} into baryon-antibaryon pairs. With this simple model, some exclusive decay processes, for example, χ{c0} → B¯ (B = Λ,Σ0,Ξ-) are investigated and their decay widths are evaluated by inclusion of the properties of outgoing baryons, and the results show that the strengthened decay channels χ{c_J} → Λ¯(J = 0, 2) are easily understood by considering only the color singlet contribution of P-wave charmonium.
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    ISSN: 1434-601X
    Keywords: 23.40.-s Beta decay; double beta decay; electron and muon capture ; 13.30.-a Decays of baryons ; 12.15.Hh Determination of Kobayashi-Maskawa matrix elements
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    Topics: Physics
    Notes: Abstract. The apparatus described here, aSPECT, will be used for a measurement of the neutrino-electron angular correlation coefficient a in the decay of free neutrons. The idea of the aSPECT spectrometer is to measure the integrated proton energy spectrum very accurately using an energy filter by electrostatic retardation and magnetic adiabatic collimation. The main ideas of the spectrometer are presented, followed by an explanation of the adiabatic transmission function. Details of the superconducting coil and of the electrode system are given, as well as a discussion of the most important systematic effects: magnetic field and electrostatic potential inhomogeneities, deviation from adiabatic motion, scattering in the residual gas, background, Doppler effect, edge effect, and detector efficiency. Using this spectrometer, the parameter a is planned to be measured with an absolute experimental uncertainty of δa ≈ 3 . 10-4, from which the axial vector to vector coupling constant ratio λ can be determined with an accuracy of δλ ≈ 0.001.
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    Monatshefte für Chemie 76 (1946), S. 163-167 
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    Monatshefte für Chemie 76 (1946), S. 168-173 
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    Monatshefte für Chemie 76 (1946), S. 132-162 
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    Monatshefte für Chemie 76 (1946), S. 126-131 
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    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Mit Hilfe der vonHaitinger ausgearbeiteten fluoreszenz-mikroskopischen Untersuchungsmethode gelang es einen deutlichen und konstanten Unterschied im mikroskopischen Bild zwischen lokalem und all-gemeinem Amyloid aufzuzeigen, der chemische Verschiedenheit der beiden Eiweißkörper wahrscheinlich macht und differente Störungen des Stoffwechsels vermuten läßt: Lokales Amyloid zeigt nach Vorbehandlung mit Thioflavin-Euchrysin eine blaue Fluoreszenz. Wir glauben in dem sogenannten lokalen Amyloid auf Grund der erhobenen Befunde einen der sogenannten fibrinoiden Degenerationen des Bindegewebes an die Seite zu stellende Veränderung sehen zu können, möglicherweise im Rahmen allergischen Geschehens entstanden.
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    Monatshefte für Chemie 76 (1946), S. 174-179 
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    The European physical journal 39 (2005), S. 41-54 
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    Notes: Abstract. New, accurate measurements of the pion and kaon electromagnetic form factors are expected in the near future from experiments at electron-positron colliders, using the radiative return method. We construct a model for the timelike pion electromagnetic form factor that is valid also at momentum transfers far above the $\rho$ resonance. The ansatz is based on vector dominance and includes a pattern of radial excitations expected from dual resonance models. The form factor is fitted to the existing data in the timelike region, continued to the spacelike region and compared with the measurements there and with the QCD predictions. Furthermore, the model is extended to the kaon electromagnetic form factor. Using isospin and SU(3)-flavor symmetry relations we extract the isospin-one contribution and predict the kaon weak form factor accessible in semileptonic $\tau$ decays.
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    The European physical journal 39 (2005), S. 95-99 
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    Notes: Abstract. We present an analysis of the longitudinal $\bar{\Lambda}_0$ polarization in ultrarelativistic heavy-ion collisions. The polarization of $\bar{\Lambda}_0$ ’s coming from the decay chain $\bar{\Xi}\rightarrow \bar{\Lambda}_0 + \pi$ exhibits a very well differentiated behavior depending on the production region of the primordial $\bar{\Xi}$ ’s. This effect reflects the different values of the $N_{\bar{\Xi}}/N_{\bar{\Lambda}_0}$ ratio in the QGP region, where nucleon-nucleon interactions take place in a hot and dense environment, and the peripherical region, in which ordinary nucleon-nucleon interactions occur. An increase in the longitudinal $\bar{\Lambda}_0$ polarization signals a strangeness enhancement which is thought of as a property of the QGP phase.
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    The European physical journal 39 (2005), S. 87-94 
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    Notes: Abstract. We analyze the low energy spectrum of bound states of the N = 1 SU(2) SUSY Yang-Mills Theory (SYM). This work continues the investigation of the non-perturbative properties of SYM by Monte Carlo simulations in the Wilson discretization with dynamical gluinos. The dynamics of the gluinos is included by the Two-Step Multi-Bosonic Algorithm (TSMB) for dynamical fermions. A new set of configurations has been generated on a $16^3\cdot 32$ lattice at $\beta = 2.3$ and $\kappa = 0.194$ . The analysis also includes sets of configurations previously generated on a smaller ( $12^3\cdot 24$ ) lattice at $\kappa = 0.1925, 0.194$ and 0.1955. Guided by predictions from low energy Lagrangians, we consider spin-1/2, scalar and pseudoscalar particles. The spectrum of SYM is a challenging subject of investigation because of the extremely noisy correlators. In particular, meson-like correlators contain disconnected contributions. The larger time-extension of the $16^3\cdot 32$ lattice allows to observe two-state signals in the effective mass. Finite-volume effects are monitored by comparing results from the two lattice sizes.
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    Notes: Abstract. The phase structure of zero temperature twisted mass lattice QCD is investigated. We find strong metastabilities in the plaquette observable in correspondence of which the untwisted quark mass assumes positive or negative values. We provide interpretations of this phenomenon in terms of chiral symmetry breaking and the effective potential model of Sharpe and Singleton.
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    The European physical journal 39 (2005), S. 451-464 
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    Notes: Abstract. Inclusive cross-sections for gluon jet production are studied numerically in the perturbative QCD pomeron model for pA and central AA collisions at high energies. Two forms for the inclusive cross-sections, with and without emission from the triple pomeron vertex, are compared. The difference was found to reduce to a numerical factor $\sim 0.7\div 0.8$ for momenta below the saturation momentum Q s. Above Q s no difference was found at all. For pA collisions the gluon spectrum was found to be $\sim A^{0.7}$ at momenta k below Q s and $\sim A^{0.9}$ above it. For central AA collisions it was found to be $\sim A$ at momenta k below Q s and $\sim A^{1.1}$ above it. At large k the spectrum goes like $1/k^{2.7\div 3.3}$ , flattening with energy. The multiplicities turned out to be proportional to A 0.7 for pA collisions and A for central AA collisions with a good precision. In the latter case they are becoming more peaked at the center with the growth of energy. Their absolute values are high and grow rapidly with energy in accordance with the high value of the BFKL intercept.
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    The European physical journal 39 (2005), S. 439-450 
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    Notes: Abstract. In this paper the revised Kajantie-Byckling approach and improved phase space sampling techniques for the massive multi-particle final states are presented. The application of the developed procedures to the processes representative for LHC physics indicates the possibility of a substantial simplification of multi-particle phase space sampling while retaining a respectable weight variance reduction and unweighing efficiencies in the event generation process.
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    The European physical journal 39 (2005), S. 503-509 
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    Notes: Abstract. A new approach to spacetime proposing the existence of n compactified large extra dimensions predicts the creation of higher-dimensional black holes at the LHC of CERN. In case they form, signatures of such black holes at accelerators would be quite significant and black hole decay products would carry valuable information for particle physics and cosmology. In this study we first make a short theoretical introduction, then present the results of an analysis made on a Monte Carlo simulation modeling black hole production and decay at the LHC. This analysis includes the examination of the lepton case in black hole to Higgs decay channels, reconstruction of the black hole masses, a calculation of the Hawking temperature and a determination of the radiated jets/leptons multiplicity ratio.
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    The European physical journal 39 (2005), S. 519-524 
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    Notes: Abstract. In this paper, we consider solutions and spectral functions of M-theory from Milne spaces with extra free dimensions. Conformal deformations to the metric associated with real hyperbolic space forms are derived. For the three-dimensional case, the orbifold identifications ${\mathrm{SL}}(2,{\mathbb{Z}} + {\mathrm{i}}{\mathbb{Z}})/\{\pm {\mathrm{Id}}\}$ , where Id is the identity matrix, is analyzed in detail. The spectrum of an eleven-dimensional field theory can be obtained with the help of the theory of harmonic functions in the fundamental domain of this group and it is associated with the cusp forms and the Eisenstein series. The supersymmetry surviving for supergravity solutions involving real hyperbolic space factors is briefly discussed.
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    The European physical journal 39 (2005), S. 397-409 
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    Notes: Abstract. The Standard Model constraints on $\alpha$ which can be derived from the $B\rightarrow\pi\pi$ decays are revisited in some depth. As experimental inputs, the $B^0\rightarrow\pi^ + \pi^-$ , $B^ + \rightarrow\pi^ + \pi^0$ decays complemented by the $B^0\rightarrow\pi^0\pi^0$ decays, the CP parameters $S_{\pi\pi}$ and $C_{\pi\pi}$ , and/or the value of $\alpha$ as determined by the global CKM fit are used. The constraints discussed here are model independent in the sense that they rely only on Isospin symmetry, following the Gronau-London proposal. A new bound on $\mathcal{B}^{00}$ and the function $C_{00}(\mathcal{B}^{00})$ are introduced. While another bound applied to BABAR results is shown to imply that $\cos(2\alpha_{\rm eff})$ is negative. The Grossman-Quinn bound is rediscussed. A close form expression is given for $\alpha$ as a function of the measurements. Various scenarios for the future of the isospin analysis are explored. To probe the Standard Model the $(\mathcal{B}^{00},C_{00})$ plane is introduced.
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    Notes: Abstract. We propose a model of the suppression of large p T pions in heavy ion collisions based on the interaction of the large p T pion with the dense medium created in the collision. The model is practically the same as the one previously introduced to describe $J/\psi$ suppression. Both the p T and the centrality dependence of the data are reproduced. In deuteron-gold collisions, the effect of the final state interaction with the dense medium turns out to be negligibly small. Here the main features of the data are also reproduced both at mid and at forward rapidities.
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    The European physical journal 40 (2005), S. 1-25 
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    Notes: Abstract. A novel high precision method measures the b-quark forward-backward asymmetry at the Z pole on a sample of 3,560,890 hadronic events collected with the DELPHI detector in 1992 to 2000. An enhanced impact parameter tag provides a high purity b sample. For event hemispheres with a reconstructed secondary vertex the charge of the corresponding quark or anti-quark is determined using a neural network which combines in an optimal way the full available charge information from the vertex charge, the jet charge and from identified leptons and hadrons. The probability of correctly identifying b-quarks and anti-quarks is measured on the data themselves comparing the rates of double hemisphere tagged like-sign and unlike-sign events. The b-quark forward-backward asymmetry is determined from the differential asymmetry, taking small corrections due to hemisphere correlations and background contributions into account. The results for different centre-of-mass energies are: $$ A_{\mathrm{FB}}^{{\mathrm{b}}} (89.449 \mathrm{GeV}) = 0.0637 \pm 0.0143(\mbox{stat.}) \pm 0.0017(\mbox{syst.})$$ $$A_{\mathrm{FB}}^{{\mathrm{b}}} (91.231 \mathrm{GeV}) = 0.0958 \pm 0.0032(\mbox{stat.}) \pm 0.0014(\mbox{syst.})$$ $$A_{\mathrm{FB}}^{{\mathrm{b}}} (92.990 \mathrm{GeV}) = 0.1041 \pm 0.0115(\mbox{stat.}) \pm 0.0024(\mbox{syst.})$$ . Combining these results yields the b-quark pole asymmetry $$ A_{\mathrm{FB}}^{{\mathrm{b, 0}}} = 0.0972 \pm 0.0030(\mbox{stat.}) \pm 0.0014(\mbox{syst.}) . $$
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    The European physical journal 40 (2005), S. 275-286 
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    Notes: Abstract. The computation of the radiation flux related to the Hawking temperature of a Schwarzschild black hole or another geometric background is still well-known to be fraught with a number of delicate problems. In spherical reduction, as shown by one of the present authors (Kummer) with Vassilevich, the correct black body radiation follows when two “basic components” (conformal anomaly and a “dilaton” anomaly) are used as input in the integrated energy-momentum conservation equation. The main new element in the present work is the use of a quite different method, the covariant perturbation theory of Barvinsky and Vilkovisky, to establish directly the full effective action which determines these basic components. In the derivation of Kummer and Vassilevich the computation of the dilaton anomaly implied one potentially doubtful intermediate step which can be avoided here. Moreover, the present approach also is sensitive to IR (renormalization) effects. We realize that the effective action naturally leads to expectation values in the Boulware vacuum which, making use of the conservation equation, suffice for the computation of the Hawking flux in other quantum states, in particular for the relevant Unruh state. Thus, a rather comprehensive discussion of the effects of (UV and IR) renormalization upon radiation flux and energy density is possible.
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    The European physical journal 40 (2005), S. 157-164 
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    Notes: Abstract. The correlator of vector heavy-quark currents at small q 2 is considered in the large- $\beta_0$ limit. The leading IR renormalon ambiguity of the sum of the perturbative series is canceled by the UV renormalon ambiguity of the gluon condensate. The asymptotic behavior of the perturbative series is obtained in a model-independent way, up to a single unknown normalization factor. Gluon-virtuality distribution functions for the perturbative correction are calculated.
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    The European physical journal 40 (2005), S. 199-203 
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    Notes: Abstract. We discuss the difference between n-dimensional regularization and n-dimensional reduction for processes in QCD which have an additional mass scale. Examples are heavy flavor production in hadron-hadron collisions or on-shell photon-hadron collisions where the scale is represented by the mass m. Another example is electroproduction of heavy flavors where we have two mass scales given by m and the virtuality of the photon $\smash[b]{Q = \sqrt{-q^2}}$ . Finally we study the Drell-Yan process where the additional scale is represented by the virtuality $\smash[t]{Q = \sqrt{q^2}}$ of the vector boson ( $\gamma^*, W, Z$ ). The difference between the two schemes is not accounted for by the usual oversubtractions. There are extra counter terms which multiply the mass scale dependent parts of the Born cross sections. In the case of the Drell-Yan process it turns out that the off-shell mass regularization agrees with n-dimensional regularization.
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    Notes: Abstract. The charge asymmetry of the g, h, and k Dalitz plot parameters for ${K^{\pm}\rightarrow \pi^{\pm} \pi^{0} \pi^{0}}$ decays has been measured with 35 GeV/c hadron beams at the 70 GeV IHEP accelerator. The g, h, and k values obtained appear to be identical for $K^{\pm}$ decays within the errors quoted. In particular, the charge asymmetry A g = (g + – g -)/(g + + g -) of the slope g is equal to ${(0.2 \pm 1.9)\cdot 10^{-3}}$ .
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    The European physical journal 40 (2005), S. 349-359 
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    Notes: Abstract. Measurements are presented of inclusive charm and beauty cross sections in e + p collisions at HERA for values of photon virtuality Q 2 〉 150 GeV2 and of inelasticity 0.1 〈 y 〈 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q 2 and Bjorken x, and values for the structure functions $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.
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    The European physical journal 40 (2005), S. 555-564 
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    Notes: Abstract. For large masses, the two heavy neutral Higgs bosons are nearly degenerate in many 2-Higgs doublet models, and particularly in supersymmetric models. In such a scenario the mixing between the states can be very large if the theory is CP-noninvariant. We analyze the formalism describing this configuration, and we point to some interesting experimental consequences.
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    Notes: Abstract. We have studied neutron quantum states in the potential well formed by the earth’s gravitational field and a horizontal mirror. The estimated characteristic sizes of the neutron wave functions in the two lowest quantum states correspond to expectations with an experimental accuracy. A position-sensitive neutron detector with an extra-high spatial resolution of $\sim 2 \mathrm{\mu} $ m was developed and tested for this particular experiment, to be used to measure the spatial density distribution in a standing neutron wave above a mirror for a set of some of the lowest quantum states. The present experiment can be used to set an upper limit for an additional short-range fundamental force. We studied methodological uncertainties as well as the feasibility of improving further the accuracy of this experiment.
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    The European physical journal 40 (2005), S. 497-503 
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    Notes: Abstract. Optimal observables are known to lead to minimal statistical errors on parameters for a given normalised event distribution of a physics reaction. Thereby all statistical correlations are taken into account. Therefore, on the one hand they are a useful tool to extract values on a set of parameters from measured data. On the other hand one can calculate the minimal constraints on these parameters achievable by any data-analysis method for the specific reaction. In case the final states can be reconstructed without ambiguities optimal observables have a particularly simple form. We give explicit formulae for the optimal observables for generic reactions in case of ambiguities in the reconstruction of the final state and for general parameterisation of the final-state phase space.
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    The European physical journal 40 (2005), S. 229-241 
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    Notes: Abstract. In the framework of percolation of color sources, the transverse momentum distribution in heavy ion and p + p collisions at all centralities and energies are shown to follow a universal behavior. The width of the distribution depends on the fluctuations of the number of color sources per cluster. At low densities, there are only independent single color sources, no fluctuations occur and the distribution is described by a single exponential. At very high densities, only one cluster of many color sources appears and therefore there are not fluctuations either and the hardness of the distribution is suppressed. The Cronin effect in this framework is due to a maximum of the fluctuations which decreases as the density increases. We obtain a good agreement with experimental data including the low p T behavior and the spectra for different particles. We show that the transverse momentum and multiplicity distributions are related to each other in a defined way. This point is satisfied by the experimental data on p + p collisions at different energies.
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    The European physical journal 40 (2005), S. 251-258 
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    Notes: Abstract. In the context of the littlest Higgs (LH) model, we study the process $e^{ + }e^{-}\rightarrow t\bar{t}$ . We find that the new gauge bosons Z H and B H can produce significant correction effects on this process, which can be further enhanced by suitably polarized beams. In most of the parameter space preferred by the electroweak precision data, the absolute value of the relative correction parameter $R_{B_{H}}$ is larger than 5 %. As long as $1 {\mathrm {TeV}} \leq M_{Z_{H}}\leq 1.5 {\mathrm {TeV}} $ and $0.3\leq c\leq 0.5,$ the absolute value of the relative correction parameter $R_{Z_{H}}$ is larger than $5\%$ . With reasonable values of the parameters of the LH model, the possible signals of the new gauge bosons B H and Z H can be detected via the process $e^{ + }e^{-}\rightarrow t\bar{t}$ in the future LC experiments with the CM energy $\sqrt{S} = 800 {\mathrm {GeV}} $ . B H exchange and Z H exchange can generate significantly corrections to the forward-backward asymmetry $A_{\mathrm {{FB}}}(t\bar{t})$ only in a small part of the parameter space.
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    The European physical journal 40 (2005), S. 565-577 
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    Notes: Abstract. In the SUSY SO(10) GUT context, we study the exclusive processes $B \to K^{(*)} l^ + l^-(l = \mu,\tau)$ . Using the Wilson coefficients of the relevant operators including the new operators $\smash{Q_{1,2}^{(\prime)}}$ which are induced by neutral Higgs boson (NHB) penguins, we evaluate some possible observables associated with these processes like the invariant mass spectrum (IMS), lepton pair forward-backward asymmetry (FBA), lepton polarization asymmetries etc. In this model the contributions from Wilson coefficients $C_{Q_{1,2}}^\prime$ , among new contributions, are dominant. Our results show that the NHB effects are sensitive to the FBA, $\mathrm {d}L/\mathrm {d}\hat{s}$ , and $\mathrm {d}T/\mathrm {d}\hat{s}$ of $B \to K^{(*)} \tau^ + \tau^-$ decay, which are expected to be measured in B factories, the deviation of $\mathrm {d}T/\mathrm {d}\hat{s}$ in $B \to K \mu^ + \mu^-$ can reach 0.1 from SM, which could be seen in B factories, and the average of the normal polarization $\mathrm {d}N/\mathrm {d}\hat{s}$ can reach several percent for $B \to K \mu^ + \mu^-$ and it is 0.05 or so for $B\to K \tau^ + \tau^-$ , which could be measured in the future super B factories and provide useful information to probe new physics and discriminate different models.
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    The European physical journal 40 (2005), S. 493-496 
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    Notes: Abstract. The most precise measurement of the weak mixing angle $\sin^2 \theta_{\mathrm{eff}}^l$ at LEP is from the forward-backward asymmetry $e^ + e^- \rightarrow b \overline{b}$ at the Z-pole. In this note the QED and electroweak radiative corrections to obtain the pole asymmetry from the measured asymmetry for b- and c-quarks have been calculated using ZFITTER, which has been amended to allow a consistent treatment of partial two-loop corrections for the b-quark final asymmetries. A total correction of $\delta A_{\mathrm{FB}}^{{b}} = 0.0019 \pm 0.0002$ and $\delta A_{\mathrm{FB}}^{{c}} = 0.0064 \pm 0.0001$ has been found, where the remaining theoretical uncertainty is much too small to explain the apparent discrepancy between $\sin^2 \theta_{\mathrm{eff}}^l$ obtained from A FB b and from the left-right asymmetry at SLD.
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    The European physical journal 40 (2005), S. 515-517 
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    Notes: Abstract. A dedicated test of the perturbative QCD NLO parton evolution in the very small-x region is performed. We find a good agreement with recent precision HERA data for F 2 p(x,Q 2), as well as with the present determination of the curvature of F 2 p. Characteristically, perturbative QCD evolutions result in a positive curvature which increases as x decreases. Future precision measurements in the very small x-region, x 〈 10-4, could provide a sensitive test of the range of validity of perturbative QCD.
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    The European physical journal 40 (2005), S. 519-529 
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    Notes: Abstract. The photonuclear production of vector mesons in ultraperipheral heavy-ion collisions is investigated within the QCD color dipole picture, with particular emphasis on the saturation model. The integrated cross section and the rapidity distribution for the $AA \rightarrow V AA$ ( $V = \rho, \omega, \phi, J/\Psi$ ) process are computed and theoretical estimates for scattering on both light and heavy nuclei are given for the energies of RHIC and LHC. A comparison with the recent STAR data on coherent production of $\rho$ mesons is also presented. Furthermore, we calculate the photoproduction of vector mesons in proton-proton collisions at RHIC, Tevatron and LHC energies.
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    The European physical journal 40 (2005), S. 419-433 
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    Notes: Abstract. We analyze the momentum space triple pomeron vertex in perturbative QCD. In addition to the standard form of this vertex which is used in the context of total cross sections at high energies and in the QCD reggeon field theory, there exists an alternative form which has to be used in the study of high-mass diffraction. We review and analyze the relation between these two versions. We discuss some implications for the BK equation. In the second part of our paper we extend this analysis to the pomeron-odderon-odderon vertex.
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    Cellular and molecular life sciences 2 (1946), S. 232-232 
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    Cellular and molecular life sciences 2 (1946), S. 250-256 
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    Cellular and molecular life sciences 2 (1946), S. 257-257 
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    Notes: Summary The activity of a zincoprotein, carbonic anhydrase, adsorbed on different mineral precipitates has been determined. No difference in activity could generally be detected between adsorbed and non-adsorbed enzyme. However, when the anion of the precipitate is a strong inhibitor, the adsorbed enzyme sometimes becomes completely inactive. In conclusion, the author has attempted to define the conditions under which the adsorption of a metallic enzyme on a mineral precipitate is influenced by the enzyme's metallic ion.
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    Cellular and molecular life sciences 2 (1946), S. 265-272 
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    Cellular and molecular life sciences 2 (1946), S. 292-295 
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    Notes: Summary The general morphological and the fissural character ofDubois' andKoenigswalds Pithecanthropi andBlack's Sinanthropus (E) strongly suggest that thePithecanthropus brain had more anthropoid features than theSinanthropus brain.
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    Cellular and molecular life sciences 2 (1946), S. 310-311 
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    Notes: Zusammenfassung Die Einwirkung von N-bromierten Amiden auf Äthylenketone wurde erforscht. Im Fall vonα-Äthylenketonen wurden Substitutionsprodukte erhalten, die zu einem bisher kaum beachteten Substanzenbereich gehören. Der Mechanismus der Bromierung von Äthylenaldehyden wurde diskutiert.
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    Cellular and molecular life sciences 2 (1946), S. 312-313 
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    Notes: Résumé L'hétérotrophie deC. Reukaufii est confirmée. Cette espèce requiert dans des conditions données: la biotine, remplaçable par la désthiobiotine, l'aneurine, remplaçable par la pyrimidine. L'action au miel est étudiée.
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    Cellular and molecular life sciences 2 (1946), S. 315-316 
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    Notes: Summary The lithium chloride and the substances, which are capable of producing a similar effect on the embryo development, increase the viscosity of proteins from the Amphibian embryo. The sodium thiocyanate, the sodium iodide and the pyocyanine lower it. The proteins fractions which can appear in elongated particles are those which feel the action of the thiocyanate and of the pyocyanine.
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    Cellular and molecular life sciences 2 (1946), S. 317-318 
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    Notes: Summary Complexes of bivalent tin with polyoxybenzene-polysulfonic acids have a diuretic effect, when injected subcutaneously in dogs or rabbits. The same compounds also sensibilize the cardiotonic effect of digitalis-substances on the isolated heart or on fragments of the isolated heart as usually employed for testing digitalis-substances. In a small number of patients suffering from heart disease, a rapid increase of their till then lowered diuresis was induced through subcutaneous injections of a solution of the above mentioned tin complex.
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    Cellular and molecular life sciences 2 (1946), S. 321-323 
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    Cellular and molecular life sciences 2 (1946), S. 323-324 
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    Cellular and molecular life sciences 2 (1946), S. 362-363 
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    Notes: Summary The α-amylase of hog pancreas has been purified and the degree of purity controled by electrophoresis. The active substance is a protein which can dissociate in an unstable high molecular component and a thermostable component of low molecular weight.
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    Cellular and molecular life sciences 2 (1946), S. 349-354 
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    Cellular and molecular life sciences 2 (1946), S. 354-361 
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    Notes: Summary After a discussion of the 11-year solar-cycle as regarded from the standpoint of the “eruption-hypothesis,” which offers a possibility to predict the solar activity for several years and after a review of the magnetic properties of the sun and the sunspots, the paper deals with the new theories of the spots and the solar-cycle as suggested byAlfvén andWalén. The terrestrial effects of the phenomena associated with the solar cycle are classified into 4 groups: effects produced by a) a wave radiationW k emitted continuously by the sun, b) a wave radiationW e emitted from the chromospheric eruptions, c) a particle radiationP k emitted by the so-called M-regions, and d) a particle radiationP e ejected from the eruptions. The connection between the solar eruptions and the radiationsP e ,W e is a well established fact; on the other hand the radiationsW k ,P k could be connected by the author with the solar corona and the stationary solar prominences respectively. To account for the intensity of theW k -radiation a temperature of the solar corona of one million degree is required in agreement with the observed temperature. The heating of the corona occurs in the electric field around an increasing sunspot. As in the corona the mean free path amounts to several kilometers, particles may be accelerated up to 1000 eV, so far the conditionh=0 is fulfilled. Generally speaking acceleration is possible only in such regions whereh andh are not perpendicular to each other.
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    Cellular and molecular life sciences 2 (1946), S. 371-372 
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    Notes: Zusammenfassung Es werden die Veränderungen im Ca- und Mg-Gehalt der Eier vonArbacia pust. während der ersten Stunde nach der Befruchtung untersucht. Es wird ein Ca- und Mg-Verlust mit Höhepunkt eine halbe Stunde nach der Befruchtung festgestellt.
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    Cellular and molecular life sciences 2 (1946), S. 372-372 
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    Notes: Résumé Culex molestus n'a pas de chromosomes sexuels. Le caractère «œil blanc» est récessif, mais ce phénotype apparaît avec des fréquences très différentes chez les ♂♂ et les ♀♀ issus d'un père hétérozygote. La masculinité est due à un gène dominant situé dans le même chromosome que «œil blanc», et à six unités de celui-ci, environ.
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    Cellular and molecular life sciences 2 (1946), S. 376-378 
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    Cellular and molecular life sciences 2 (1946), S. 378-380 
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    Cellular and molecular life sciences 2 (1946), S. 145-146 
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    Notes: Summary Experiments were carried out to test the effects of relative humidity on prepupae and pupae of the Silkworm,Bombyx mori L., at 250 C. It was found that: (1) duration of prepupal + pupal stages is the same at all relative humidities between 7 and 100%; (2) mortality seems unaffected in all these humidity conditions; (3) moths obtained in percentages between 55 and 100% R. H. have the same average wet weight; moths obtained under dryer conditions have a lower average weight (expressed in percentage of initial weights of prepupae); (4) pupae extracted from their cocoons develop as quickly and as well as pupae in their cocoons.
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    Cellular and molecular life sciences 2 (1946), S. 151-152 
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    Cellular and molecular life sciences 2 (1946), S. 152-152 
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    Cellular and molecular life sciences 2 (1946), S. 152-152 
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    Cellular and molecular life sciences 2 (1946), S. 160-171 
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    Cellular and molecular life sciences 2 (1946), S. 153-159 
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    Notes: Summary The cytoplasm consists of the cortex and the endoplasm. The rather thin cortex is built up by protein-leaflets and lipoid lamellae. The endoplasm is a structure of fibrils forming a dense network. The fibrils, composed of chromidia and interchromidia must be considered as a bundel of polypeptide chains. They are about of the same size as the elementary fibrils in the tail of the spermatozoa. The chromidia show all the main properties of what has been called theoretically “biogenmolecule.” They are centers of growth and metabolism of the cytoplasm. The different functions of the various components of the plasm are considered.
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    Cellular and molecular life sciences 2 (1946), S. 171-180 
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    Notes: Summary The constitution of the different wood-substances is discussed. The total amount of the polysaccharides, called holocellulose, can be obtained if the separation is effected carefully. The holocellulose consists of submicroscopic crystalline cellulose and wood-polyoses which differ also from cellulose by their degree of polymerisation. Less progress has been made in the elucidation of the lignin-structure but owing to work recently undertaken the author has been able to give further information about these questions. Work on model substances obtained synthetically has been very promising. An exact definition of the different constituents is necessary and the author has tried to give such a definition which corresponds to the present development of ligninchemistry. It is possible that the different wood-compounds are connected in some still unknown manner so that we might speak of a uniform “wood-substance.” This definition nevertheless is quite different from the term “wood-substance” which was used at the beginning of research on wood-constituents.
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    Cellular and molecular life sciences 2 (1946), S. 180-182 
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    Notes: Summary By means of a technic published in this journal (2, 66 [1946]), it has been observed that the activity of the pseudo-choline esterase of the serum is highest in presence of high concentrations of acetylcholine. The true choline esterase of the red corpuscules has her optimal activity at concentrations of 200 mg % acetylcholine. This high activity of these choline esterase is only going on during 3 to 5 minutes; after this period an inhibition occurs. At lower substrate concentrations (50 mg % acetylcholine) the difference in activity in the first and second phase is becoming less pronounced and the curve of the choline esterase activity becomes a straight line. At the small substrate concentration (4 mg % acetylcholine) again a primary higher choline esterase activity has been observed. Choline inhibitsin vitro the activity of the choline esterase. Prostigmine inhibits alsoin vivo andin vitro, the choline esterase of serum and globules.
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    Cellular and molecular life sciences 2 (1946), S. 183-184 
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    Notes: Résumé L'auteur a étudié aux rayons X la transition du titanate de barium autour de 120° C. Dans un intervalle de quelques degrés, il y a coexistence des deux formes cristallines (tétragonale et cubique). Il semble probable qu'il y a une nouvelle transition près de — 183° C. Il est intéressant de noter que ces pointsλ ne peuvent pas être attribués à une mise en rotation de molécules.
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    Notes: Summary Radioactive 2-bromo-3-hydroxy-1:4-naphtoquinone has been used for the exploration of the metabolism of substances which influence the course of blood-clotting. It has been found that this substance diffuses very rapidly into the blood, and that the liver is not characterized by any elective fixation-power.
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    Cellular and molecular life sciences 2 (1946), S. 186-188 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung In der Berührungsfläche einer an verschiedenen Metallen geriebenen polierten Glas- oder Quarzplatte werden helle, punktförmige Lichtblitze schon bei verhältnismäßig schwachen Reibungseffekten beobachtet. Die lokale Temperatur muß mindestens 550°C betragen. Die Beobachtung deutet auf kleinste Kontaktflächen und ist von Bedeutung für die Kenntnis der Reibungsvorgänge.
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  • 92
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    Cellular and molecular life sciences 2 (1946), S. 191-192 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The action of desoxycorticosteronglucoside was tested on the isolated frog-heart. In concentrations of 10−6 to 10−4 a small negative inotropic effect is prevailing. Acting together with acetylcholine, the substance diminishes or abolishes the negative inotropic and chronotropic action of acetylcholine. Eserin has no influence and the inhibition is also observed with cholinchloride and the carbaminoyl ester of choline. This inhibitory action bears a close resemblance to the inhibitory action of thiamin. In both cases a complex mechanism seems to be involved.
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  • 93
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    Cellular and molecular life sciences 2 (1946), S. 210-214 
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  • 94
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    Cellular and molecular life sciences 2 (1946), S. 204-210 
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    Topics: Biology , Medicine
    Notes: Summary After a historical survey on the discovery of the small planets and the international organization of the calculation of orbits the importance of the divergences from the ordinary orbits between Mars and Jupiter is discussed. On the one side those small planets which approach Mars, Jupiter, even Earth and Saturn, in strongly excentric orbits offer new methods for the mass determination of the large planets; e.g. the perigee of Eros made possible a new determination of the parallax of the sun (8″,79). On the other side the group of the Trojans e.g. gives new aspects for the problem of the three bodies. In the breaches of commensurability the statistical distribution of the orbits of the small planets hints to the problem of the stability of the planetary system.
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  • 95
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    Cellular and molecular life sciences 2 (1946), S. 220-221 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
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    Notes: Summary It is shown that the intensity of the red coronal line 6374 Á is diminished in the regions of the stationary solar prominences.
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    Cellular and molecular life sciences 2 (1946), S. 222-222 
    ISSN: 1420-9071
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    Topics: Biology , Medicine
    Notes: Summary Herpes corneæ simplex (febrilis) is a virus disease. In 1942 the author found out that the purely epithelial forms of Herpes corneæ are cured on an average within four days, if the patients took 4–5 milligrams of «Gynergen Sandoz» (Ergotamin-tartrate Stoll) a day. According to the newest observations fresh Herpes corneæ can also be cured through rinsing with a solution of 0.5 mg of Gynergen (2 cm3 a day). The development of the Herpes disease and its cure is a chemical process of the cells, which, according to the author, is influenced by Gynergen. — Ergotamin is won out ofsecale cornutum, which owes its origin to the fungusClaviceps purpurea. This fungus together with thePenicillium notatum belongs to theAscomycetes group. Both are biologically related and their substance has chemical points of contact. — With respect to bacteria, Penicillin is antibiotic, the author presumes antibiotical properties against Herpes in Ergotamin (Gynergen Sandoz), the study of which he suggests should be gone into more thoroughly. With two different viruses Gynergen Sandoz has been known to bring about a cure in many cases: namely Herpes zoster ophthalmicus, and Herpes corneæ simplex (febrilis).
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  • 97
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    Cellular and molecular life sciences 2 (1946), S. 232-232 
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  • 98
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    Notes: Summary The males of two species of Palestine,Saga ephippigera Fisch. andS. gracilipes Uvar have respectively 33 and 31 chromosomes in the diploid state.S. pedo Pallas, a parthenogenetic thelytoc species largely distributed in Europe, has 68 chromosomes and probably represents a tetraploid. The cells of the three species have identical dimensions and the polyploidS. pedo is even the smallest in size.
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    Cellular and molecular life sciences 2 (1946), S. 259-260 
    ISSN: 1420-9071
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    Topics: Biology , Medicine
    Notes: Summary A new simple method for the production of experimental hypertension has been developed. Anoxæmia of the kidney has been produced by encapsulating the organ in tubes of acetyl cellulose. Development and degree of hypertension is directly depending on the ratio between size of kidney and tube, so that standard size tubes for definite animal weight may be used with high percentage of success.
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    Cellular and molecular life sciences 2 (1946), S. 313-315 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The temperature effective period for the formation of double antennæ and palpi in the gene-combinationsc ec ct; Dfd r-L ends with the second half of the third larval stage. The t.e.p. of the mutantsaristopedia andproboscipedia ends with puparium formation. Thus we have another proof that the imaginal discs ofDrosophila are not definitely determined in the last larval stage.
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