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  • Brackish  (4)
  • Electronic structure and strongly correlated systems  (4)
  • Air Transportation and Safety
  • 2015-2019  (9)
  • 1980-1984
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  • 1
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    La rhodophycée Gracilaria verrucosa (Hudson) Papenfuss, du lac de Bizerte (Tunisie): variations mensuelles de la biomasse, du rendement et de la qualité de l'agar. (2016)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: During the year of 1999, the red seaweed Gracilaria verrucosa (Hudson) Papenfuss (Rhodophyta, Gracilariales, Gracilariaceae), has been followed monthly in Bizerte lake (in the north of Tunisia). The parameters studied are: biomass, agar-yield, gel strength, gelling and melting temperatures. The results showed that the highest average of wet biomass is recorded in June (2500 g/m super(2)) and the lowest is obtained in October (130 g/m super(2)). The highest agar-yield is obtained in April (37,92 %) ; while the lowest is recorded in September (10,67 %). High and low gel strengths are obtained in May (410g /cm super(2)) and in December (125 g :cm super(2)), respectively. Gelling temperature varies between 31 degree C and 44~ 'C, while melting temperature varies between 79 degree C and 100 degree C
    Beschreibung: Published
    Schlagwort(e): Qualité ; Agar ; Yield ; Quality ; Seaweed products ; Biomass ; Gracilaria verrucosa ; Brackish
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp. 127-136
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 2
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    Evaluation des potentialités quantitatives naturelles des Gracilaires (algues rouges) du lac Nord de Tunis. (2016)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: L’estimation de la biomasse de la macroalgue Gracilaria dans le lac nord de Tunis a été réalisée au cours de Juin-Juillet 1996 à partir de 38 stations d’échantillonnage couvrant tous les types de recouvrement de l’espèce. Il en ressort que la biomasse en poids humide est de 191 g/m2 (28 g/m2 en poids sec) et engendre un potentiel total estimé à 508 tonnes, soit 74 tonnes en poids sec (la matière sèche représentant en moyenne 14,5 % de la matière humide). Eu égard à la quantité de Gracilaria disponible à l’état naturel, la valorisation de cette espèce au niveau de ce site pourrait demander le recours à la phycoculture.
    Beschreibung: The red seaweed Gracilaria biomass in the Tunis north lake (Tunisia) was estimated between June and July 1996 with reference to different stations. This biomass represent 191 g/m super(2) (wet weight) and 28 g/m super(2) (dry weight). so the total quantity is estimated to 508 t in wet and 74 in dry (the average of dry material represent in general 14,5 % of the humid materiel). Because of its low natural total production, the development of Gracilaria seaweed in this site need culture processing.
    Beschreibung: Published
    Schlagwort(e): Macroalgues ; Phycoculture ; Potential resources ; Aquaculture development ; Marine aquaculture ; Seaweed culture ; Coastal lagoons ; Biomass ; Seaweeds ; Gracilaria ; Brackish
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: 15-27
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 3
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    Résultats des cultures expérimentales de la rhodophycée Gracilaria verrucosa (Hudson) Papenfuss dans le lac de Bizerte, Tunisie septentrionale. (2016)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: This study was conducted in Bizerte lake (Tunisia) between April and July of 1998. It concerns Gracilaria verrucosa culture with 3 techniques in order to determine the best one. After 58 days, the sand pudding method gave the best result with reference of average weight (1205 g), % of recuperation of the tuft (90 %), final density (2,7 kg/m super(2)) and specific growth rate (3,100).
    Beschreibung: Published
    Schlagwort(e): Mode de culture ; Accroisseirent du poids ; Densité de culture ; Sujet growth rate ; Density ; Experimental culture ; Seaweed culture ; Culture media ; Aquaculture techniques ; Gracilaria verrucosa ; Brackish
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp. 113-125
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 4
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    Potentialités en macroalgues: cartographie et biomasse de l'agarophyte Gracilaria dans le lac de Bizerte. (2016)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: The prospecting study of the Gracilaria in Bizerte lake (Tunisia) between the river bank and a depth of 3 m and concerning 1300ha shows that the macro seaweeds cover a surface of 348 ha and give a wet total biomass of 4775 (that is 573 t dry weight) with reference to average density of 1,7 kg/m super(2). These species are principally present as band between Menzel Abderrahman and Oued Gueniche (Tunisia)
    Beschreibung: Published
    Schlagwort(e): Macroalgues ; Fishery surveys ; Botanical resources ; Seaweed harvesting ; Biomass ; Gracilaria ; Brackish
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp. 17-34
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 5
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    Symmetry and correlations underlying hidden order in URu_{2}Si_{2} (2015)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2015-01-27
    Beschreibung: Author(s): Nicholas P. Butch, Michael E. Manley, Jason R. Jeffries, Marc Janoschek, Kevin Huang, M. Brian Maple, Ayman H. Said, Bogdan M. Leu, and Jeffrey W. Lynn We experimentally investigate the symmetry in the hidden order (HO) phase of intermetallic URu 2 Si 2 by mapping the lattice and magnetic excitations via inelastic neutron and x-ray scattering measurements in the HO and high-temperature paramagnetic phases. At all temperatures, the excitations respect ... [Phys. Rev. B 91, 035128] Published Mon Jan 26, 2015
    Schlagwort(e): Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Digitale ISSN: 1095-3795
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 6
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    Inelastic x-ray scattering measurements of phonon dynamics in URu_{2} Si_{2} (2016)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2016-02-12
    Beschreibung: Author(s): D. R. Gardner, C. J. Bonnoit, R. Chisnell, A. H. Said, B. M. Leu, T. J. Williams, G. M. Luke, and Y. S. Lee We report high-resolution inelastic x-ray scattering measurements of the acoustic phonons of URu 2 Si 2 . At all temperatures, the longitudinal acoustic phonon linewidths are anomalously broad at small wave vectors revealing a previously unknown anharmonicity. The phonon modes do not change significantl… [Phys. Rev. B 93, 075123] Published Thu Feb 11, 2016
    Schlagwort(e): Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Digitale ISSN: 1095-3795
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 7
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    Spin-orbit coupled systems in the atomic limit: rhenates, osmates, iridates (2018)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2018-06-12
    Beschreibung: Author(s): Arun Paramekanti, David J. Singh, Bo Yuan, Diego Casa, Ayman Said, Young-June Kim, and A. D. Christianson Motivated by RIXS experiments on a wide range of complex heavy oxides, including rhenates, osmates, and iridates, we discuss the theory of RIXS for site-localized t 2 g orbital systems with strong spin-orbit coupling. For such systems, we present exact diagonalization results for the spectrum at diffe... [Phys. Rev. B 97, 235119] Published Mon Jun 11, 2018
    Schlagwort(e): Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Digitale ISSN: 1095-3795
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 8
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    Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbTe_{3} (2015)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2015-06-30
    Beschreibung: Author(s): M. Maschek, S. Rosenkranz, R. Heid, A. H. Said, P. Giraldo-Gallo, I. R. Fisher, and F. Weber We present a high-energy-resolution inelastic x-ray scattering investigation of the soft phonon mode in the charge-density-wave (CDW) system TbT e 3 . We analyze our data based on lattice dynamical calculations using density-functional-perturbation theory and find clear evidence that strongly momentum-… [Phys. Rev. B 91, 235146] Published Mon Jun 29, 2015
    Schlagwort(e): Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Digitale ISSN: 1095-3795
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 9
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    Analysis of UAS DAA Surveillance in Fast-Time Simulations without DAA Mitigation (2015)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-19
    Beschreibung: Realization of the expected proliferation of Unmanned Aircraft System (UAS) operations in the National Airspace System (NAS) depends on the development and validation of performance standards for UAS Detect and Avoid (DAA) Systems. The RTCA Special Committee 228 is charged with leading the development of draft Minimum Operational Performance Standards (MOPS) for UAS DAA Systems. NASA, as a participating member of RTCA SC-228 is committed to supporting the development and validation of draft requirements for DAA surveillance system performance. A recent study conducted using NASA's ACES (Airspace Concept Evaluation System) simulation capability begins to address questions surrounding the development of draft MOPS for DAA surveillance systems. ACES simulations were conducted to study the performance of sensor systems proposed by the SC-228 DAA Surveillance sub-group. Analysis included but was not limited to: 1) number of intruders (both IFR and VFR) detected by all sensors as a function of UAS flight time, 2) number of intruders (both IFR and VFR) detected by radar alone as a function of UAS flight time, and 3) number of VFR intruders detected by all sensors as a function of UAS flight time. The results will be used by SC-228 to inform decisions about the surveillance standards of UAS DAA systems and future requirements development and validation efforts.
    Schlagwort(e): Air Transportation and Safety
    Materialart: ARC-E-DAA-TN27427 , RTCA SC-228 DAA Surveillance Subgroup Meeting; Oct 22, 2015; Moffett Field, CA; United States
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
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