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  • Fusion energy  (2)
  • Meteorology and Climatology  (2)
  • 3-hexyne  (1)
  • 2000-2004  (5)
  • 1935-1939
  • 2000  (5)
Collection
Keywords
Publisher
Years
  • 2000-2004  (5)
  • 1935-1939
Year
  • 1
    Electronic Resource
    Electronic Resource
    Technical Opportunities for International Collaborations by the U.S. Fusion Program (2000)
    Springer
    Journal of fusion energy 19 (2000), S. 65-79 
    Details
    ISSN: 1572-9591
    Keywords: Fusion energy ; international collaboration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This report was prepared by a Working Group at the request of the U.S. Department of Energy, Office of Fusion Energy Sciences in 1997. The report addresses technical opportunities for mutually beneficial collaboration between the United States and other international fusion research programs. A number of outstanding opportunities are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012281826821
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Crystal structure of [WI2(CO)2{P(OiPr)3}(η2-EtC2Et)] (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 181-184 
    Details
    ISSN: 1572-8854
    Keywords: tungsten(II) ; diiodo ; dicarbonyl ; triisopropylphosphite ; 3-hexyne ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract [WI2(CO)2{P(OiPr)3}(η2-EtC2Et)] crystallizes in the monoclinic space group P21/n, with a = 11.101(12), b = 16.272(18), c = 14.892(17) Å, β = 93.27(1), Z = 4. The geometry can be considered to be pseudo-octahedral, with the 3-hexyne ligand occupying one site, with two iodo-groups, and the P(OiPr)3 ligand completing the equational plane of ligands, with two trans-carbonyl groups occupying the axial sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009531014474
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Report of the Integrated Program Planning Activity for the U.S. Department of Energy Fusion Energy Sciences Program (2000)
    Springer
    Journal of fusion energy 19 (2000), S. 169-228 
    Details
    ISSN: 1572-9591
    Keywords: Fusion energy ; fusion program planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This report of the Integrated Program Planning Activity (IPPA) has been prepared in response to a recommendation by the Secretary of Energy Advisory Board that, “Given the complex nature of the fusion effort, an integrated program planning process is an absolute necessity.” We therefore undertook this activity to integrate the various elements of the program, to improve communication and performance accountability across the program, and to show the interconnectedness and interdependency of the diverse parts of the national Fusion Energy Sciences Program. This report is based on the September 1999 Fusion Energy Sciences Advisory Committee's (FESAC) report “Priorities and Balance within the Fusion Energy Sciences Program.” In its December 5, 2000, letter to the Director of the Office of Science, the FESAC reaffirmed the validity of the September 1999 report and stated that the IPPA presents a framework and process to guide the achievement of the 5-year goals listed in the 1999 report. The report also outlines a process for establishing a database for the fusion research program that will indicate how each research element fits into the overall program. This database will also include near-term milestones associated with each research element and will facilitate assessments of the balance within the program at different levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015210800836
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    Paper (German National Licenses)
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  • 4
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    The Influence of Soil Moisture, Coastline Curvature, and Land-Breeze Circulations on Sea-Breeze Initiated Precipitation (2000)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: Idealized numerical simulations are performed with a coupled atmosphere/land-surface model to identify the roles of initial soil moisture, coastline curvature, and land breeze circulations on sea breeze initiated precipitation. Data collected on 27 July 1991 during the Convection and Precipitation Electrification Experiment (CAPE) in central Florida are used. The 3D Goddard Cumulus Ensemble (GCE) cloud resolving model is coupled with the Goddard Parameterization for Land-Atmosphere-Cloud Exchange (PLACE) land surface model, thus providing a tool to simulate more realistically land-surface/atmosphere interaction and convective initiation. Eight simulations are conducted with either straight or curved coast-lines, initially homogeneous soil moisture or initially variable soil moisture, and initially homogeneous horizontal winds or initially variable horizontal winds (land breezes). All model simulations capture the diurnal evolution and general distribution of sea-breeze initiated precipitation over central Florida. The distribution of initial soil moisture influences the timing, intensity and location of subsequent precipitation. Soil moisture acts as a moisture source for the atmosphere, increases the connectively available potential energy, and thus preferentially focuses heavy precipitation over existing wet soil. Strong soil moisture-induced mesoscale circulations are not evident in these simulations. Coastline curvature has a major impact on the timing and location of precipitation. Earlier low-level convergence occurs inland of convex coastlines, and subsequent precipitation occurs earlier in simulations with curved coastlines. The presence of initial land breezes alone has little impact on subsequent precipitation. however, simulations with both coastline curvature and initial land breezes produce significantly larger peak rain rates due to nonlinear interactions.
    Keywords: Meteorology and Climatology
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Soil Moisture and Mesoscale Convective Complex Development During the 1993 US Midwest Flood: Results from the MM5-PLACE Atmosphere/Land-Surface Model (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The 1993 US Midwest Flood produced record levels of flooding, in the Mississippi River Basin. This flooding resulted from repeated frontal passages and mesoscale convective complexes (MCCs) during the months of June and July. A better understanding of processes that influenced MCC development during the 1993 Flood may lead to improved forecasts of heavy precipitation and flooding. Here, we consider the impact of soil moisture on MCC development during a two-day period (June 23-24) of the 1993 US Midwest Flood. The purpose of this study is to assess the importance of soil moisture distribution on the timing, intensity, and location of heavy precipitation. In this study, the MM5-PLACE Atmosphere/Land-Surface Model is utilized. The atmospheric component consists of the Penn State/NCAR MM5 mesoscale model, and the land-surface component consists of the Goddard Parameterization for Land Atmosphere-Cloud Exchange (PLACE). Initial soil moisture is provided from two sources: 1) NCEP reanalysis, and 2) Antecedent Precipitation Index (API) using NOAA rain gauge measurements as a proxy for soil moisture. NCEP reanalysis provides coarse resolution initial soil moisture (2.5 degree), while API provides high resolution initial soil moisture (10-200 km depending on NOAA rain gauge spacing). Initial results indicate that the distribution of soil moisture has a significant impact on the timing and location of heavy precipitation during this two-day flood event. Precipitation in simulations with high resolution initial soil moisture agrees more closely with observed precipitation. These results suggest that high resolution soil moisture observations are necessary to accurately predict severe storm development, heavy precipitation, and subsequent flooding.
    Keywords: Meteorology and Climatology
    Type: 2001 American Meteorological Society meeting; 14-19 Jan. 2001`; Albuquerque, NM; United States
    Format: text
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    NASA TECHNICAL REPORTS
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