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  • Books  (1)
  • Other Sources  (3)
  • 1990-1994  (4)
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  • Books  (1)
  • Articles  (251)
  • Other Sources  (3)
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  • 1
    Monograph available for loan
    Monograph available for loan
    Schwerminerale in Farbe (1991)
    Stuttgart : Enke
    Details Availability
    Call number: 11/M 92.0700 ; AWI G1-95-0204 ; M 92.0693
    Description / Table of Contents: In diesem Bestimmungsatlas werden 61 transparente Schwerminerale, die in Sedimenten vorkommen können, ausführlich beschrieben und jeweils auf einem oder mehreren Farbfotos abgebildet. Das Buch ist damit ein einzigartiges Hilfsmittel bei der mikroskopischen Bestimmung. Der einleitende Teil behandelt die Grundlagen der Schwermineralanalyse: gebräuchliche Labormethoden und Hilfsmittel, Faktoren, die die Schwermineralvergesellschaftungen in Sedimenten beeinflussen und Schlüsse, die sich aus den gefundenen Schwermineralspektren ziehen lassen.
    Type of Medium: Monograph available for loan
    Pages: 148 Seiten , Illustrationen
    ISBN: 3432987811
    Classification:
    Petrology, Petrography
    Language: German
    Note: Inhalt: Vorwort. - Danksagung. - Teil 1. - Die Schwermineralanalyse - Grundlagen und Anwendung. - 1 Einführung. - 2 Schwerminerale in Sedimenten - Anwendungszweck und Grenzen ihrer Analyse. - 2.1 Hydraulische Effekte. - 2.2 Schwerminerale und Korngröße. - 2.3 Die chemische Stabilität der Schwerminerale. - 3 Methodik. - 3.1 Probennahme für Schwermineraluntersuchungen. - 3.2 Aufbereitung der Proben. - 3.2.1 Brechen und Desaggregation der Festgesteine. - 3.2.2 Wahl der Korngrößenklasse durch Sieben. - 3.2.3 Schwermineraltrennung. - 3.2.4 Vorbereitung für die optische Bestimmung. - 3.3 Mikroskopische Bestimmung. - 3.4 Kornzählung. - 3.5 Untersuchung der Varietäten. - 3.6 Hilfstechniken. - 3.6.1 Röntgendiffraktometrie. - 3.6.2 Röntgenfluoreszenz-Spektrometrie. - 3.6.3 Mikrosondenanalysen. - 3.6.4 Rasterelektronenmikroskop (REM). - 3.6.5 Kathodenlumineszenz (KL). - 3.7 Darstellung und numerische Behandlung von Schwermineralanalysen. - 4 Anwendung von Schwermineralanalysen. - Teil 2 Beschreibung der Schwermineralarten. - Übersicht der Schwerminerale. - Beschreibung der Schwermineralarten. - Literatur. - Bestimmungstabelle. - Namenregister. - Sachregister.
    Location: Reading room
    Location: AWI Reading room
    Branch Library: GFZ Library
    Branch Library: AWI Library
    Branch Library: GFZ Library
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  • 2
    facet.materialart.
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    Computer modeling of a hot filament diamond deposition reactor (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: A commercial fluid mechanics program, FLUENT, has been applied to the modeling of a hot-filament diamond deposition reactor. Streamlines and contours of constant temperature and species concentrations are obtained for practical reactor geometries and conditions. The modeling is presently restricted to two-dimensional simulations and to a chemical mechanism of ten independent homogeneous and surface reactions. Comparisons are made between predicted power consumption, substrate temperature, and concentrations of atomic hydrogen and methyl-radical with values taken from the literature. The results to date indicate that the modeling can aid in the rational design and analysis of practical reactor configurations.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: In: Applications of diamond films and related materials; Proceedings of the 1st International Conference, Auburn, AL, Aug. 17-22, 1991 (A93-40551 16-76); p. 591-596.
    Format: text
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  • 3
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    Photovoltaic superiority for Space Station Freedom power in the 21st century (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Complete power systems capable of delivering 75 kW of continuous power in low earth orbit have been compared. Performance, liabilities, and advantages are discussed for a shielded nuclear system, a solar dynamic system, and photovoltaic systems, both current Freedom Si design and near-term GaAs/Ge with NaS storage. System components include power generation, storage (if required), heat rejection, power conversion and distribution, structural support, and shielding (if required). Performance parameters indicate the substantial advantage of the GaAs/Ge photovoltaic system, which does not require altering the support structure of the current Freedom design.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IEEE Photovoltaic Specialists Conference; May 21, 1990 - May 25, 1990; Kissimmee, FL; United States
    Format: text
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  • 4
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    Application of a linear spectral model to the study of Amazonian squall lines during GTE/ABLE 2B (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: A linear nonhydrostatic spectral model is run with the basic state, or large scale, vertical profiles of temperature and wind observed prior to convective development along the northern coast of South America during the GTE/ABLE 2B. The model produces unstable modes with mesoscale wavelength and propagation speed comparable to observed Amazonian squall lines. Several tests with different vertical profiles of low-level winds lead to the conclusion that a shallow and/or weak low-level jet either does not produce a scale selection or, if it does, the selected mode is stationary, indicating the absence of a propagating disturbance. A 700-mbar jet of 13 m/s, with a 600-mbar wind speed greater or equal to 10 m/s, is enough to produce unstable modes with propagating features resembling those of observed Amazonian squall lines. However, a deep layer of moderate winds (about 10 m/s) may produce similar results even in the absence of a low-level wind maximum. The implications in terms of short-term weather forecasting are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 97; D18; p. 20,405-20,419.
    Format: text
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    NASA TECHNICAL REPORTS
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