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  • Geosciences (General)  (6)
  • General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.  (5)
  • Pathogens & Pathogenicity
  • 2015-2019  (12)
  • 1
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    Isolation and identification of nematode-antagonistic compounds from the fungus Aspergillus candidus (2016)
    Oxford University Press
    Details
    Publication Date: 2016-02-20
    Description: Culture medium from an isolate of the fungus Aspergillus candidus was extracted, fractionated and examined to discover compounds antagonistic to plant-parasitic nematodes that are important pathogens of agricultural crops. Column, thin layer and preparative chromatographies and spectral and elemental analyses, were used to isolate and identify two major constituents of an active fraction (Fraction F) obtained from the medium. Compound 1 was identified as 2-hydroxypropane-1, 2, 3-tricarboxylic acid (citric acid). Compound 2 was identified as 3-hydroxy-5-methoxy-3-(methoxycarbonyl)-5-oxopentanoic acid, an isomer of 1, 2-dimethyl citrate. Compound 1 and a citric acid standard, each tested at 50 mg mL –1 in water, decreased hatch from eggs of the plant-parasitic nematode Meloidogyne incognita by more than 94%, and completely immobilized second-stage juveniles after 4–6 days exposure. Fraction F and Compounds 1 and 2 decreased the mobility of adults of the plant-parasitic nematode Ditylenchus destructor in vitro . Fraction F (25 mg mL –1 ) inhibited mobility 〉99% at 72 hrs. Compounds 1 and 2 (50 mg mL –1 ) each inhibited mobility more than 25% at 24 hr and more than 50% at 72 hr. This is the first assignment of nematode-antagonistic properties to specifically identified A. candidus metabolites.
    Keywords: Pathogens & Pathogenicity
    Print ISSN: 0378-1097
    Electronic ISSN: 1574-6968
    Topics: Biology
    Published by Oxford University Press
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  • 2
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    Connectivity is a Poor Indicator of Fast Quantum Search (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-03-19
    Description: Author(s): David A. Meyer and Thomas G. Wong A randomly walking quantum particle evolving by Schrödinger’s equation searches on d-dimensional cubic lattices in O(√ N ) time when d≥5, and with progressively slower runtime as d decreases. This suggests that graph connectivity (including vertex, edge, algebraic, and normalized algebraic connectivit... [Phys. Rev. Lett. 114, 110503] Published Wed Mar 18, 2015
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Certifying the Presence of a Photonic Qubit by Splitting It in Two (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-02-17
    Description: Author(s): Evan Meyer-Scott, Daniel McCloskey, Klaudia Gołos, Jeff Z. Salvail, Kent A. G. Fisher, Deny R. Hamel, Adán Cabello, Kevin J. Resch, and Thomas Jennewein A photonic qubit has been transmitted over a lossy 30-meter-long channel without destroying its state in a precertification scheme that does not require synchronization or indistinguishability. [Phys. Rev. Lett. 116, 070501] Published Tue Feb 16, 2016
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Quantum-Limited Atomic Receiver in the Electrically Small Regime (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-09-12
    Description: Author(s): Kevin C. Cox, David H. Meyer, Fredrik K. Fatemi, and Paul D. Kunz We use a quantum sensor based on thermal Rydberg atoms to receive data encoded in electromagnetic fields in the extreme electrically small regime, with a sensing volume over 1 0 7 times smaller than the cube of the electric field wavelength. We introduce the standard quantum limit for data capacity, a... [Phys. Rev. Lett. 121, 110502] Published Tue Sep 11, 2018
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Polynomial Monogamy Relations for Entanglement Negativity (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-02-25
    Description: Author(s): Grant W. Allen and David A. Meyer The notion of nonclassical correlations is a powerful contrivance for explaining phenomena exhibited in quantum systems. It is well known, however, that quantum systems are not free to explore arbitrary correlations—the church of the smaller Hilbert space only accepts monogamous congregants. We demo… [Phys. Rev. Lett. 118, 080402] Published Fri Feb 24, 2017
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Observation of Two-Dimensional Localized Jones-Roberts Solitons in Bose-Einstein Condensates (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-10-12
    Description: Author(s): Nadine Meyer, Harry Proud, Marisa Perea-Ortiz, Charlotte O’Neale, Mathis Baumert, Michael Holynski, Jochen Kronjäger, Giovanni Barontini, and Kai Bongs Jones-Roberts solitons are the only known class of stable dark solitonic solutions of the nonlinear Schrödinger equation in two and three dimensions. They feature a distinctive elongated elliptical shape that allows them to travel without change of form. By imprinting a triangular phase pattern, we ... [Phys. Rev. Lett. 119, 150403] Published Wed Oct 11, 2017
    Keywords: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Developing Data Services to Provide Data Quality Information for Global Satellite-Based Precipitation Products (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Global satellite-based precipitation products have been widely used in research and applications around the world. Compared to ground-based observations, satellite-based measurements provide data on a global scale, especially in remote continents and over oceans. The NASA Goddard Earth Sciences (GES) Data and Information Services Center (DISC) is home to NASA global precipitation product archives including the Tropical Rainfall Measuring Mission (TRMM), the Global Precipitation Measurement (GPM), as well as other global and regional precipitation products. Precipitation is one of the top downloaded and accessed parameters in the GES DISC data archive. Meanwhile, users want to easily locate and obtain data quality information at regional and global scales to better understand how precipitation products perform and how reliable they are. As a data service provider, it is necessary to provide easy access to data quality information. However, such information normally is not available, and when it is available, it is not in one place and difficult to locate. In this presentation, we will present such challenges and activities at the GES DISC to address precipitation data (other datasets as well) quality issues.
    Keywords: Geosciences (General)
    Type: GSFC-E-DAA-TN62899 , Workshop of the International Precipitation Working Group; Nov 05, 2018 - Nov 09, 2018; Seoul; Korea, Democratic People''s Republic of
    Format: application/pdf
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  • 8
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    GPM, TRMM, and Other Global Precipitation Products and Services at NASA GES DISC (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Precipitation is a key environmental variable. For example, in agriculture, precipitation, temperature, water (soil moisture), solar radiation, NDVI, etc., are key variables.Rainfed agriculture major farming practices that rely on rainfall for water.Rainfed agriculture: 〉95% of farmed land (sub-Saharan Africa); 90% (Latin America); 75% (Near East and North Africa); 65% (East Asia); 60% (South Asia).Droughts and floods can cause severe crop loss. The Goddard Earth Sciences (GES) Data and Information Services Center (DISC), one of 12 NASA data centers, is located in Greenbelt, Maryland, USA. The NASA GES DISC is a major data archive center for global precipitation, water & energy cycles, atmospheric composition, and climate variability.
    Keywords: Geosciences (General)
    Type: GSFC-E-DAA-TN62904 , Workshop of the International Precipitation Working Group (IPWG-9); Nov 05, 2018 - Nov 09, 2018; Seoul; Korea, Democratic People''s Republic of
    Format: application/pdf
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  • 9
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    The Best Educational Tool for Interdisciplinary Earth Science Giovanni (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Accessing and using NASA Earth science data has commonly presented a challenge to many educators and students, due to issues such as heterogeneous data formats, complex data structures, large volumes of data storage, special programming requirements, and diverse analytical software options that often require a significant investment in time and resources, especially for novices. By facilitating data access and evaluation, as well as promoting open access to create a more level playing field for non-funded scientists, NASA Earth observation data can be more readily used for scientific discovery and societal benefits. To advance this goal, the NASA Goddard Earth Sciences (GES) Data and Information Services Center (DISC) developed the Geospatial Interactive Online Visualization ANd aNalysis Infrastructure (Giovanni). To date, Giovanni has assisted researchers around the world publish over 1300 peer-reviewed papers in a wide range of Earth science disciplines. In this presentation, we will demonstrate how easy it is to use Giovanni for the rapid creation of many different analyses of both weather and climate events.
    Keywords: Geosciences (General)
    Type: GSFC-E-DAA-TN57881 , Asia Oceania Geosciences Society (AOGS) Annual Meeting; Jun 03, 2018 - Jun 08, 2018; Honolulu, HI; United States
    Format: application/pdf
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  • 10
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    NASA GES DISC Earth Science Data Support (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: It is the NASA Goddard Earth Sciences (GES) Data and Information Services Center (DISC) mission statement to facilitate data access and evaluation, as well as scientific exploration and discovery. Recently, GES DISC has been evolving and improving our data management and services in order to promote GES DISC data to be easily discovered, improve usage and made more interoperable with common tools. As a result, we will present a brief review of our recent data services at the GES DISC including our new science-data driven website, subsetting and resampling services across multitude of satellite processing levels, visualization services, and how we utilize social media tools to interact with user communities.
    Keywords: Geosciences (General)
    Type: IG08-A21 , GSFC-E-DAA-TN57883 , AOGS (Asia Oceania Geosciences Society) Annual Meeting; Jun 03, 2018 - Jun 08, 2018; Honolulu, HI; United States
    Format: application/pdf
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