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  • Other Sources  (10,203)
  • EARTH RESOURCES AND REMOTE SENSING  (3,802)
  • LUNAR AND PLANETARY EXPLORATION  (3,680)
  • STRUCTURAL MECHANICS  (2,702)
  • Deutschland
  • Magnetism
  • Surface physics, nanoscale physics, low-dimensional systems
  • 2010-2014  (5)
  • 1980-1984  (7,682)
  • 1970-1974  (2,503)
  • 1925-1929
Collection
Source
Keywords
Publisher
Language
Years
Year
  • 1
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    Der Rostbefall des Weizens im Jahre 1925 (1925)
    In:  Deutsche Landwirtschaftliche Presse, Jahrgang 52, Nr. 38, p. 450
    Details
    Publication Date: 1925
    Description: Allgemeine Beobachtungen zum Rostbefall von Weizen im Jahr 1925 trotz langer Trockenperioden KATASTER-BESCHREIBUNG: Einfluss des Niederschlags auf die Infektion; auch kurze starke Niederschläge zwischen langen Trockenperioden sind ausreichend um einen großflächigen Befall zu bewirken. KATASTER-DETAIL: Delta Nied +, dann Infektion +;
    Keywords: Deutschland ; 1925 ; Anbautermine ; Niederschlag ; Pflanzenkrankheit ; Trockenheit ; Weizen
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  • 2
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    Kapitel Wald (2013)
    In:  ???
    Details
    Publication Date: 2013
    Description: Simulationen mithilfe des Models 4C zu möglichen Auswirkungen der Klimaänderungen des RCP 8.5 Klimaszenariums auf Wälder in Deutschland Kiefer Fichte Eiche Buche KATASTER-BESCHREIBUNG: Auswirkungen des Klimawandels (Temperatur, Niederschlag, CO2-Gehalt der Atmosphäre) auf die Wälder KATASTER-DETAIL: Delta T (Frühjahr) + und Delta Nied (Frühjahr) -, dann Produktivität der Wälder -; Delta C02 + um 25 - 30 %, dann Produktion der Wälder + um 9 - 20%; Delta T + (an nicht wasserlimitierten Standorten), dann Produktivität der Wälder +; Delta CO2+, dann Wassernutzungseffizienz der Wälder +; Delta T (Sommer) +, dann Waldbrandgefahr +; Delta T (Sommer) + und Delta Nied (Sommer) - (= WaBi -), dann Trockenstress der Wälder + um bis zu 9% und dann Produktivität der Wälder -; Delta T (Sommer) + und Delta Nied (Sommer) -, dann Populationsdichte Kiefern-Großschädlinge +;
    Keywords: Deutschland ; 20. und 21. Jahrhundert ; Boden ; Buche ; Eiche ; Fichte ; Forst ; Kiefer ; Klima ; Niederschlag ; Pflanzenschädling ; Phänologie ; Sturmschaden ; Temperatur ; Trockenheit ; Verdunstung ; Waldbrand ; Waldwachstum ; Wassermangel ; Wind ; Grundwasser ; Modell
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  • 3
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    Potential effects of global warming on oilseed rape pathogens in Northern Germany (2012)
    In:  Fungal Ecology 5 :6 2-7 2
    Details
    Publication Date: 2012
    Description: Übersicht über bisherige, dokumentiere Zusammenhänge einer Klimaänderung und pilzliche Krankheiten in Raps, Abschätzungen über das Auftreten von Verticillium longisporum, Sclerotinia sclerotiorum, Alternaria brassicae und Phoma lingam an Raps in der Zukunft KATASTER-BESCHREIBUNG: Projektionen über das Auftreten von pilzlichen Pathogenen in Raps, Basiszeitraum 1971-2000, Szenario A1B, REMO, 2001-2030 und 2071-2100, Zusammenhang zwischen Grad-Tagen(〉0°C), Pflanzenentwicklung und Krankheitsparametern als Regressionsfunktionen im Artikel, jedoch sind feiner aufgelöste Projektion von RCM als Tageswerte erforderlich, um Wachstumszyklen zu simulieren und genauere Aussagen zu erhalten KATASTER-DETAIL: Delta T +, dann Zunahme von Verticillium longisporum, Sclerotinia sclerotiorum, Alternaria brassicae und Phoma lingam an Raps, Signal verstärkt im Szenarienzeitraum 2071-2100, Abnahme von Pyrenopeziza brassicae
    Keywords: Deutschland ; Sachsen, Niedersachsen, Norddeutschland ; 1971-2000 ; Szenarien ; Infektionskrankheiten ; Temperatur ; Raps
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  • 4
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    Das gegenwärtige und frühere Vorkommen der Malaria und die Verbreitung der Anophelesmücken im Gebiete des Deutschen Reiches (1927)
    In:  Arbeiten aus dem Reichsgesundheitsamte 59
    Details
    Publication Date: 1927
    Keywords: Deutschland ; Umweltmedizin ; Infektionskrankheiten
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  • 5
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    Floren-Elemente und Temperaturverteilung in Deutschland. (1927)
    In:  Ber. Deut. Bot. Gesellschaft 45:638-643.
    Details
    Publication Date: 1927
    Description: Einfluss der Temperatur auf die Flora und ihre Verteilung in Deutschland KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Botanik ; Klima ; Phänologie ; Temperatur
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  • 6
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    Studien über den Nutzwert von Gräsern und Kleearten unter dem Einfluss von Klima und Boden. (1926)
    In:  Landwirtschaftl. Jahrbuch (64)817-930.
    Details
    Publication Date: 1926
    Description: Zusammenhang Klima, Witterung und Ertrag von Gräsern und Klee KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Boden ; Ertrag ; Klima ; Landwirtschaft
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  • 7
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    Einfluss von Temperatur und Niederschlag auf die Vegetation. (1926)
    In:  Met. Zeitschr. 43:352-355.
    Details
    Publication Date: 1926
    Description: Einfluss von Temperatur und Niederschlag auf die Vegetation KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; 1900-1925 ; Klima ; Niederschlag ; Temperatur
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  • 8
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    Einfluss der Witterungs-Erscheinungen auf die Erträge unserer Kulturpflanzen. (1928)
    In:  Deut. Landwirtschaflt. Presse 55:94-95.
    Details
    Publication Date: 1928
    Description: Übersicht über die Literatur zum Einfluss des Wetters auf die Kulturpflanzen KATASTER-BESCHREIBUNG: Milder und trockener Winter wirkt positiv auf die Weizenerträge, kalter und niederschlagsreicher Winter eher negativ, Betrachung für Norddeutschland KATASTER-DETAIL:
    Keywords: Deutschland ; 1900-1926 ; Kartoffeln ; Ertrag ; Getreide ; Hafer ; Landwirtschaft ; Niederschlag ; Roggen ; Temperatur ; Trockenheit ; Witterung ; Gerste
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  • 9
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    Das Betriebssystem und das Klima "Untersuchungen über die Beziehungen zwischen Betriebssystemen und Klima an Betrieben in ganz Deutschland" (1929)
    In:  Diss., Giessen.
    Details
    Publication Date: 1929
    Description: Einfluss der Witterungsfaktoren auf verschiedene Kulturen und die Betriebssysteme KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Witterung
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  • 10
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    Die Maikäfer in Deutschland. Mitteilungen über Flugjahre und Entwicklungsdauer von Melolontha melolontha L. und Melolontha hippocastani F. (1925)
    In:  Arbeiten aus der biologischen Bunbdesanstalt für Land- und Forstwirtschaft 14, Heft 1; Parey, Springer, Berlin; p.1-76
    Details
    Publication Date: 1925
    Description: Detaillierte Auflistung des Maikäferauftretens verschiedener Jahre aus dem Zeitraum 1900-1920 aus ganz Deutschland in Bezirks- teilw. sogar Gemeindeauflösung wird gegeben. Der Einfluß der Temperatur in Form von 9°C Mitteltemperatur als Grenze für die Generationenanzahl der beiden Maikäferarten Melolontha melolontha L. und Melolontha hippocastani F. wird diskutiert. Eine Karte über die Generationsdauer der beiden Maikäferarten im deutschen Reich, teilweise auf Bezirksebene, ist enthalten. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; 1855-1923 ; Forst ; Pflanzenschädling
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  • 11
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    Handbuch des Kartoffelbaus (1928)
    In:  P. Paray (Berlin), 317 Seiten
    Details
    Publication Date: 1928
    Description: Beziehung der Witterungseinflüsse auf die Knollenerträge, Auswertungen von Kartoffelkulturstationsergebnissen KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; 1900-1925
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  • 12
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    Hitzetag im Jahr in Deutschland (2010)
    In:  Internes Arbeitsmaterial des PIK, .... fs01/guests\Martin.Wodinski\PIK-COLLECTION\SLIDES-POOL\RD2\
    Details
    Publication Date: 2010
    Description: Kalkulation der Hitzetage (Tmax 〉 30°C) anhand es PIK/DWD Datensatzes für 1951-2006 im Jahr, und für den Zeitraum 2051-60, Szenario A1B, als Mittel und Differenzkarten KATASTER-BESCHREIBUNG: Hitzetage (Tmax 〉 30°C) in Deutschland KATASTER-DETAIL: Zunahme der Hitzetage (Tmax 〉 30°C) 2051-2060 vs. 1951-2006 um bis zu 16 Tagen im Jahr, stärkste Zunahme Rheingragben, Rheinland-Pfalz, Niederrhein, Kölner Bucht und Mitteldeutschland
    Keywords: Deutschland ; 1951-2006, 2051-60 ; Temperatur ; Witterungsextreme
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  • 13
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    Trend in den jährl. Hochwassermax. 1951-2003 (2012)
    In:  Hattermann, F. F., Z. W. Kundzewicz, H. S., T. Vetter, W. Kron, O. Burghoff, Y. Hauf, V. Krysanova, F.-W. Gerstengarbe, P. Werner, B. Merz, A. Bronstert (2012a), Flood risk in holistic perspective - observed changes in Germany. In: Changes of flood risk in Europe, IAHS Press, Wallingford, 212-237.
    Details
    Publication Date: 2012
    Description: Simulierte und beobachtete Trends der jährlichen Hochwassermaxima KATASTER-BESCHREIBUNG: Trend der Zu- bzw. Abnahme der Andauer der jährlichen Hochwassermaxima in Deutschland für die Vergangenheit KATASTER-DETAIL: Abnahme des mittleren jährlichen Abflusses um 35 % in Baden-Württemberg (Pegel Achstetten/Baierzer Rot) bzw. 21 % in Brandenburg (Pegel Ketzin/Havel) Zunahme des mittleren jährlichen Abflusses um 84 % in Bayern (Pegel Breitenbachkamm/Breitach) bzw. 74 % in Bayern (Pegel Kalteneck/Ilz)
    Keywords: Deutschland ; 1951-2003 ; Witterungsextreme ; Hochwasser
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  • 14
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    Phänologie und Reife des Körnermaises in der Bundesrepublik Deutschland in Abhängigkeit von Witterung und Klima (1974)
    In:  Diss. Weihenstephan.
    Details
    Publication Date: 1974
    Description: Analyse des Klimas und der Witterung in Bezug zu den Maiserträgen des Versuchsfeldes KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; 1956-74 ; Ertrag ; Klima ; Korrelationsmethode ; Mais ; Niederschlag ; Temperatur
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  • 15
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    Klimatische Wasserbilanz in Deutschland (2010)
    In:  Internes Arbeitsmaterial des PIK, .... fs01/guests\Martin.Wodinski\PIK-COLLECTION\SLIDES-POOL\RD2\
    Details
    Publication Date: 2010
    Description: Kalkulation der Klimatischen Wasserbilanz (mm) anhand es PIK/DWD Datensatzes für 1951-2006 im Jahr, und für den Zeitraum 2051-60, Szenario A1B, als Mittel und Differenzkarten KATASTER-BESCHREIBUNG: Jährliche Klimatischen Wasserbilanz WABI (Niederschlag - pot. Verdunstung nach Turc-Ivanov) für Deutschland KATASTER-DETAIL: Zu- bzw. Abnahme der (WABI) 2051-2060 vs. 1951-2006 von 200 - (-100) im Westen der BRD, in Ostdeutschland stärkere, einheitliche Abnahme der WABI um bis zu 300mmm
    Keywords: Deutschland ; 1951-2006, 2051-60 ; Niederschlag ; Temperatur ; Witterungsextreme
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  • 16
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    Die Schwankungen der barometrischen Hochlagen über Mitteleuropa und ihr Einfluß auf die Ernteerträge in Deutschland (1929)
    In:  Kühn-Archiv, Berlin, XX, Seite 7-129
    Details
    Publication Date: 1929
    Description: Lage der Hochs nördlich und südlich des 50. Breitengrades und ihre Bedeutung für die Witterung und Ernteerträge in Mitteldeutschland KATASTER-BESCHREIBUNG: KATASTER-DETAIL: Tmit+ (Janurar, Februar, März, Mai und Dezember) durch Abnahem der barometrischen Nordlagen Tmit- (August, September) durch Zunahme der barometrischen Nordlagen Nied+ (Janurar, Apri,, Mai, August, September, Dezember) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!) Nied- (Februar, März, Oktober und November) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!)
    Keywords: Deutschland ; 1900-1925 ; Luftfeuchte ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Witterung ; Sonnenscheindauer
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  • 17
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    Insektenschädigungen am Getreide (1925)
    In:  Georgine, Jahrgang 102, Nr. 68, p. 806-807
    Details
    Publication Date: 1925
    Description: Biologie und Bekämpfung von Fritfliege, Getreideblumenfliege, scheckige oder gelbe Halmfliege, Weizenfliege, Hessenfliege KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag und Wind) auf die Schädlinge KATASTER-DETAIL: Delta T (Winter) +, Anzahl Maden der Halmfliege +; Delta Nied (September) + und Delta Wind (September) +, dann Hessenfliege -
    Keywords: Deutschland ; 1903-1925 ; Insekten ; Anbautermine ; Boden ; Ertrag ; Getreide ; Hafer ; Niederschlag ; Pflanzenschädling ; Temperatur ; Vegetationsperiode ; Weizen ; Wind ; Witterung ; Düngung ; Gerste
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  • 18
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    Zum Auftreten des Gelbrostes des Weizens (1926)
    In:  Nassauer Land 108, p. 185
    Details
    Publication Date: 1926
    Description: Beobachtungen zum Gelbrostbefall von Weizen, Roggen und Gerste KATASTER-BESCHREIBUNG: - KATASTER-DETAIL: -
    Keywords: Deutschland ; 1926 ; Infektionskrankheiten ; Getreide ; Pflanzenkrankheit ; Roggen ; Weizen ; Gerste
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  • 19
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    Curatorial functions and the U.S. Antarctic meteorite program (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The discovery of concentrations of meteorites in Antarctica by Japanese field parties in 1969, and subsequently by joint U.S.-Japanese and U.S. field parties since 1976 has provided a significant new resource for understanding the origin and evolution of the solar system. The number of meteorites as well as the variety of meteorites has increased dramatically, and substantial amounts of data derived from their study has begun to appear in the scientific literature. The U.S. program of investigation has drawn on curatorial experience derived from the lunar program to: (1) develop specific collection and preliminary examination protocols; (2) provide documented samples for scientific investigations in response to specific requests; and (3) coordinate research by scientific consortia. The productivity of scientific research is significantly enhanced by these management approaches. Some of the results of the curatorial program for Antarctic meteorites carried out over the past three years are described.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: National Institute of Polar Research, Memoirs (ISSN 0386-0744); 20, D
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  • 20
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    Some factors that affect the inspection of aircraft for fatigue damage (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Fatigue crack length relationship with aircraft inspection intervals and structural reinforcement, high strength materials, and aircraft usage effects
    Keywords: STRUCTURAL MECHANICS
    Type: NASA AIRCRAFT SAFETY AND OPERATING PROBL., VOL. 1 1971; P 391-401
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  • 21
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    Preliminary vibration design and test criteria considerations for the space shuttle (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Vibration design and test criteria considerations for space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 423-450
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  • 22
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    The effects of parameter variation on inflight wind loading (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Optimization of payload for space shuttle by reducing structural loading and weight
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 315-332
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  • 23
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    Buffet response of space shuttle launch configurations as determined by tests of an aeroelastic model (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Buffet response of straight wing and delta wing model of space shuttle launch configuration
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 265-291
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  • 24
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    Preliminary measurements and flow visualization studies of pressure fluctuations on space shuttle configurations (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Transonic wind tunnel investigation of flow characteristics and pressure fluctuation of space shuttle launch and reentry configurations
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 293-314
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  • 25
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    Application of recent panel flutter research to the space shuttle. Part 2 - Influence of edge clips and flow angularity (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Parameters contributing to aeroelastic problems in thermal protection of space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 247-264
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  • 26
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    Application of recent panel flutter research to the space shuttle. Part 1 - Boundary layer and hypersonic effects (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Application of research in panel flutter and boundary layer thickness to space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 231-245
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  • 27
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    Thick high aspect ratio wing, part 2 (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Transonic flutter and buffeting for elastic wind tunnel models of straight wing proposed for space shuttles
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 201-229
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  • 28
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    Space shuttle liquid dynamics (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Problems in propellant dynamics including pipeline dynamics, effect of bubble location, turbulent flow, and effect of tilting tank on liquid oscillation frequency
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 95-120
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  • 29
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    Approximate analysis and dynamic tests for a thermal protection system panel (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Dynamic response of thermal protection system panel for space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LANGLEY RES. CENTER NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 49-93
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  • 30
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    Space shuttle TPS panel vibration studies (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Vibration tests of space shuttle panels at room temperature
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 27-48
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  • 31
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    Recent studies of space shuttle multibody dynamics (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Vibration studies of dynamic scale model of space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 3 APR. 1971; P 1-25
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  • 32
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    Transverse deflections of a 45-inch diameter, lightweight mirror blank - Experiment and theory (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Theoretical calculations and holographic measurements on transverse deflections of astronomical mirror blank
    Keywords: STRUCTURAL MECHANICS
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 287-270
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  • 33
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    Space vehicle response to atmospheric disturbances (1970)
    In:  CASI
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    Publication Date: 2005-11-27
    Description: Dynamic analysis to predict space vehicle response to atmospheric disturbances with reference to space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 331-348
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  • 34
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    Assessment of the potential for load alleviation concepts for space shuttle vehicles (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Load alleviation and structural mode control potential for space shuttle vehicle
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 349-363
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    Panel vibration and random loads (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Basic vibration characteristics and random response in thin panels
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 43-57
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    Dynamic response of antenna structures in a launch environment (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Communications satellite antenna structure dynamic response to random loads in launch environment
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 301-329
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    Space shuttle staging dynamics (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Staging dynamics for piggyback space shuttles
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 123-142
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  • 38
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    Lifting and control surface flutter (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Lifting and control surface flutter on space shuttles
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 177-198
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  • 39
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    Vibration isolation of large masses and vacuum chambers (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Control systems for vibration isolation of large structures and vacuum chambers
    Keywords: STRUCTURAL MECHANICS
    Type: NASA, WASHINGTON OPT. TELESCOPES TECHNOL. 1970; P 733-749
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  • 40
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    Behavior of structural joints and assemblies under thermal environment (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Thermal environment effects on alignment behavior of structural joints and assemblies of reentry vehicle and Mars landing module
    Keywords: STRUCTURAL MECHANICS
    Type: OPT. TELESCOPE TECHNOL. 1970; P 335-349
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  • 41
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    Vibration environment (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Vibration response and acoustic fatigue characteristics of space shuttle thermal protection system design concepts
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 273-284
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  • 42
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    Application of dynamic models (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Dynamic model for obtaining response data for space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 29-42
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  • 43
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    Influence on the POGO effect of the aerodynamic phenomena in a rocket afterbody (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Pogo effect influence on aerodynamic phenomena in rocket afterbody
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 263-265
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    Assessment of advances in structural analysis for space shuttle (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The latest technology for structural analysis in relation to the design tasks that lie ahead for the space shuttle is reviewed. For shell-of-revolution structures, the analysis can be formulated as a one-dimensional problem which is readily solved by using finite-difference or numerical-integration techniques. For more general asymmetric shells, a two-dimensional formulation is required. However, the governing equations are readily formulated and are amenable to solution by finite-difference techniques. For a completely general structural arrangement, such as structural frameworks, recourse is usually made to discretized formulations using finite elements. Of course, the finite-element programs could be used for shell structures, but at a loss in accuracy and increase in computer time compared with the special purpose programs.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA Space Shuttle Technol. Conf.; p 685-725
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  • 45
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    Structural deformation of an orthotropic plate (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Ring reinforcements for damping structural deformation in orthotropic mirror design
    Keywords: STRUCTURAL MECHANICS
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 283-286
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  • 46
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    Application of finite element techniques to the design and manufacture of astronomical mirrors (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Finite element method for structural design of astronomical mirrors
    Keywords: STRUCTURAL MECHANICS
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 249-255
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  • 47
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    Transient loading considerations for shuttle design (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Transient loading considerations for shuttle design
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 79-100
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  • 48
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    Assessment of current methods for dynamic analysis of complex structures (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Assessment of techniques for determining eigenvalues of large systems
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 4-27
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  • 49
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    Thermal deformation prediction in orbiting observatory structures (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Using finite element method in analysis and design of optical space telescopes
    Keywords: STRUCTURAL MECHANICS
    Type: OPT. TELESCOPE TECHNOL. 1970; P 401-415
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  • 50
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    Self-weight loaded structures in the context of lightweight mirror applications (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Structural analysis for optimal load carrying substrate members of lightweight astronomical mirror
    Keywords: STRUCTURAL MECHANICS
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 257-280
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  • 51
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    Checklist for boom selection (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: User checklist for spacecraft boom selection with review of structural, electrical and mechanical properties
    Keywords: STRUCTURAL MECHANICS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 51-54
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  • 52
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    Considerations in the design of orbital telescopes for dynamic environments (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Acoustic, vibration, and shock environments in designing orbital telescopes
    Keywords: STRUCTURAL MECHANICS
    Type: OPT. TELESCOPE TECHNOL. 1970; P 389-400
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  • 53
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    Prevention of coupled structure-propulsion instability /POGO/ on the space shuttle (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Coupled structure-propulsion system instability /POGO/ prevention on space shuttle
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. LEWIS RES. CENTER SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 249-262
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  • 54
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    State of the art for panel flutter as applied to space shuttle heat shields (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Supersonic panel flutter of space shuttle heat shields with flexible supports
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 2 JUL. 1970; P 199-221
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  • 55
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    A deployment fixture for the simulated zero- gravity testing of a large-area solar array (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Design and development of deployment fixture for simulated zero gravity testing of large area solar array
    Keywords: STRUCTURAL MECHANICS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 83-89
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  • 56
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    State of the art materials and design for spacecraft booms (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Mechanical and thermal properties of materials for five spacecraft boom designs
    Keywords: STRUCTURAL MECHANICS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 43-45
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  • 57
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    The design of aerospace mechanisms - A customer's opinion (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Customer opinion of design of aerospace mechanisms
    Keywords: STRUCTURAL MECHANICS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 91-94
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  • 58
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    Spacecraft booms - Present and future (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Performance summary and spacecraft applications of booms with future trends
    Keywords: STRUCTURAL MECHANICS
    Type: JPL PROC. OF THE 4TH AEROSPACE MECH. SYMP. 15 JAN. 1970; P 55-72
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  • 59
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    Finite element modelling of buried structures (1984)
    In:  CASI
    Details
    Publication Date: 2005-03-28
    Description: In many structures the final stress states are dependent on the sequence of construction or the stress states at various stages of construction are of interest. Such problems can be analyzed using finite element programs that have the capability of adding (birthing) elements to simulate the progress of construction. However, the usual procedure of assembling elements may lead to numerical instabilities or stress states that are unrealistic. Both problems are demonstrated in the analysis of a structure using the program ADINA. A technique which combines application of a preload with element birthing to overcome these problems is described and illustrated.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 395-404
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    Single-drop impact damage prediction for low density, coated ceramic materials (1984)
    In:  CASI
    Details
    Publication Date: 2005-03-28
    Description: A technique utilizing finite element analysis, liquid impact kinematics, and momentum theory is described and compared to single-drop impact test data performed on various configurations of coated ceramic material. The method correlates well with test data and is useful in predicting the single-drop impact damage velocity threshold for low-density, coated ceramic materials.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 385-393
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    Simulation of contact surface erosion for impact problems (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: An algorithm is outlined for simulating the contact surface erosion for impact problems. The algorithm dynamically relocates the contact surface as projectile and target materials exceed their failure criterion. Example computations of axisymmetric and oblique impacts are compared with experimental data.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 315-324
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    Response and characteristics of structures subjected to S-H waves (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: A study of the dynamic characteristics of a coupled translational-rotational system is given. The formulation of the problem considers the soil-structure interaction effects by utilizing the impedance functions at the foundation of a structure. Due to the fact that the coefficient matrix in the characteristic equation is frequency dependent in nature, iterations have to be performed to find the nature frequencies of the system. Examples and discussions are presented. Comparisons of the analytical results from various approaches are also given.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 289-296
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    Nonlinear dynamic analysis of sandwich panels (1984)
    In:  CASI
    Details
    Publication Date: 2005-03-28
    Description: Two analytical techniques applicable to large deflection dynamic response calculations for pressure loaded composite sandwich panels are demonstrated. One technique utilizes finite element modeling with a single equivalent layer representing the face sheets and core. The other technique utilizes the modal analysis computer code DEPROP which was recently modified to include transverse shear deformation in a core layer. The example problem consists of a simply supported rectangular sandwich panel. Included are comparisons of linear and nonlinear static response calculations, in addition to dynamic response calculations.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 251-268
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    Initial postbuckling analysis of elastoplastic thin-shear structures (1984)
    In:  CASI
    Details
    Publication Date: 2005-03-28
    Description: The design of thin shell structures with respect to elastoplastic buckling requires an extended analysis of the influence of initial imperfections. For conservative design, the most critical defect should be assumed with the maximum allowable magnitude. This defect is closely related to the initial postbuckling behavior. An algorithm is given for the quasi-static analysis of the postbuckling behavior of structures that exhibit multiple buckling points. the algorithm based upon an energy criterion allows the computation of the critical perturbation which will be employed for the definition of the critical defect. For computational efficiency, the algorithm uses the reduced basis technique with automatic update of the modal basis. The method is applied to the axisymmetric buckling of cylindrical shells under axial compression, and conclusions are given for future research.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 237-250
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    Fracture, failure, and fragmentation (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: A general approach is required for describing matter of behavior when the failure is likely to involve growth and coalescence of a large number of fractures. Failures of this kind appear frequently in rapid dynamic processes, particularly in the formation of spall fragments. An approach to formulating constitutive relations that accounts for the opening, shear and growth of an ensemble of cracks is discussed. The approach accounts for plastic flow accompanying fragmentation. The resulting constitutive relations were incorporated into a Lagrangian computer program. A theoretical approach to coalescence is described. The simplest formulation uses a linear Liouville equation, with crack growth limited by the mean free path of cracks, assumed constant. This approach allows for an anisotropic distribution of cracks. An alternative approach in which the decrease of the mean free path with increasing crack size is accounted for, but the crack distribution is assumed isotropic is described. A reduction of the governing Liouville equation to an ordinary differential equation of third order is possible, and the result can be used to determine how mean free path decreases with increasing crack size.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 185-195
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    Composite laminate optimization program suitable for microcomputers (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: The design of a composite panel requires some way of finding the minimum thickness laminate which will withstand the load requirements without failure. The mathematical complexity of this problem dictates the use of nonlinear optimization techniques. Specialized laminate optimization programs were developed which are compact and efficient enough to run on microcomputers. Only stresses at a point and inplane loads and deflections are considered. The programs are simple to use and require no knowledge of optimization. Techniques are developed which find minimum thickness laminates with either ply ratios or ply angles as design variables. A method is presented for finding the optimum orientation for the axis of symmetry of an orthotropic laminate. The orthotropic laminate program uses an approximate failure theory, which speed up computations dramatically.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 181-183
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    Sensitivity analysis of limit state functions for probability-based plastic design (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: The evaluation of the total probability of a plastic collapse failure P sub f for a highly redundant structure of random interdependent plastic moments acted on by random interdepedent loads is a difficult and computationally very costly process. The evaluation of reasonable bounds to this probability requires the use of second moment algebra which involves man statistical parameters. A computer program which selects the best strategy for minimizing the interval between upper and lower bounds of P sub f is now in its final stage of development. The relative importance of various uncertainties involved in the computational process on the resulting bounds of P sub f, sensitivity is analyzed. Response sensitivities for both mode and system reliability of an ideal plastic portal frame are shown.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 159-179
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    A triangular finite element for thin plates and shells (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: A finite element modeling technique which utilizes a triangular element called TSHEL with 45 degrees of freedom and seven point integration was tested for analysis of thin plate and shell structures. The element formulation is based on the degenerate solid shell concept and the mixed formulation with assumed independent inplane and transverse shear strains. The effectiveness of the present modeling technique which features combined use of elements with kinematic modes and those without kinematic modes to eliminate both locking and spurious kinematic modes at the global structural levels are shown.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 123-142
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    Stress-derivative control of keystoning deformation in finite element codes (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: The stress derivative technique for control of keystoning deformation in under-integrated finte elements is based on expansion of the stress in a Taylor series about the element center and retention of additional terms beyond the constant stress term. It has the advantage over other control techniques that keystoning resistance is provided by actual rather than artificial material properties. Application of this technique to the quadrilateral ring elements used for modelling solids of revolution subjected to axisymmetric loads is described. In a cylindrical coordinate system additional terms appear in the formulation which must be dealt with in arriving at a workable keystoning control scheme.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 111-122
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    Initial experience with distributing structural calculations among computers operating in parallel (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: An existing program is currently being adapted to perform finite element analysis by distributing substructures over a network of four Apple IIe microcomputers connected to a shared disk. In this network, one microcomputer controls the entire process while the others perform the analysis on each substructure in parallel. This substructure analysis is used in an iterative, fully stressed, structural resizing procedure. This procedure allows experimentatation with resizing in which all analyses are not completed during a single iteration. This research gives some insight on how to configure multidiscriplinary analysis and optimization procedures for decomposable engineering systems using either high performance engineering workstations or a parallel processor supercomputer. In addition, the operational experience gained facilitates the implementation of analysis programs on these new computers when they become available in an engineering environment.
    Keywords: STRUCTURAL MECHANICS
    Type: Res. in Struct. and Dyn., 1984; p 45-54
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    Application of concurrent processing to structural dynamic response computations (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: Described are the experiences gained from solving for the dynamic response of two simple structures on an experimental Multiple Instruction Multiple Data (MIMD) computer called the finite element machine. Introduced are MIMD computing concepts, describing how the concurrent algorithmic techniques implemented and giving results for the two example problems. The results show computational speedups of up to 7.83 using eight of the finite element machine processors and indicate that significant computational speedups are possible for large order structural computations.
    Keywords: STRUCTURAL MECHANICS
    Type: Res. in Struct. and Dyn., 1984; p 31-44
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    The FLEX/32 multicomputing environment (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: The FLEX/32 Multicomputer is a generic environment for cooperating multiple processors. The FLEX/32 supports a number of different processors, making it heterogeneous in terms of the instruction sets it supports, and homogeneous in its ability to provide consistent storage and input/output facilities to its differing processors. These facilities are accessed through standard 32-bit VMEbus connections. The FLEX/32 supports the full UNIX System V Operating System and languages associated with it, plus the extended ConCurrent C and Concurrent FORTRAN 77 languages that allow programming of concurrent software at a high level. Direct programming support at all levels is provided by the environment hardware for concurrent software execution and optimization, including hardware support for shared resource access arbitration, conditional critical region arbitration, and interprocessor messages.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 1-14
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    Finite element computation on nearest neighbor connected machines (1984)
    In:  CASI
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    Publication Date: 2005-03-28
    Description: Research aimed at faster, more cost effective parallel machines and algorithms for improving designer productivity with finite element computations is discussed. A set of 8 boards, containing 4 nearest neighbor connected arrays of commercially available floating point chips and substantial memory, are inserted into a commercially available machine. One-tenth Mflop (64 bit operation) processors provide an 89% efficiency when solving the equations arising in a finite element problem for a single variable regular grid of size 40 by 40 by 40. This is approximately 15 to 20 times faster than a much more expensive machine such as a VAX 11/780 used in double precision. The efficiency falls off as faster or more processors are envisaged because communication times become dominant. A novel successive overrelaxation algorithm which uses cyclic reduction in order to permit data transfer and computation to overlap in time is proposed.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA. Langley Research Center Res. in Struct. and Dyn., 1984; p 15-29
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    Computer processed LANDSAT data (1982)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: Background information and exercises are provided to: (1) establish or expand understanding of the concepts, methods, and terminology of computer processing of image producing data; (2) develop insight into the advantages of computer based image processing compared with the photointerpretation approach for processing, classifying, interpreting, and applying remote sensing data; (3) foster a broad perspective on the principal of the main techniques for image enhancement, pattern recognition, and thematic classification; (4) appreciate the pros and cons of batch and interactive modes of image analysis; (5) examine and evaluate some specific computer generated products for subscenes in Pennsylvania and New Jersey; and (6) interrelate these particular examples of output with more theoretical explanations of computer processing strategies and procedures.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: The LANDSAT Tutorial Workbook; p 145-232
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    Ode to gravity: Depth/diameter for fresh craters on Mercury (1984)
    In:  CASI
    Details
    Publication Date: 2009-11-23
    Description: Opinions conflict over the role of surface gravity in shaping impact craters on Mercury. One view holds that the effects of g are evident in measurable aspects of crater form; other investigators find little or no evidence for g's geomorphic importance. Ambiguity in the role of g and other variables in cratering on Mercury stems largely from uncertainty in identifying major geomorphic contrasts and the crater sizes at which they occur. One of these, depth/diameter (d/D), undergoes a major change at the transition from simple (bowl shaped) to complex (peaks and terraces) crater interiors. Four least-squares d/D fits for fresh craters on Mercury were attemped. The results are inconsistent. The d/D data that should resolve previous shortcomings is presented. The revised d/D distributions for simple and complex craters, which intersect at a diameter of about 5 km, support the initial thesis that g substantially influences the form of Mercury's craters.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 104-106
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    Apollo 12 soil mechanics investigation (1971)
    In:  CASI
    Details
    Publication Date: 2006-08-20
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Calif. Univ. Res. in the Space Sci., v. 2; 24 p
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  • 77
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    Space shuttle liftoff dynamics (1970)
    In:  CASI
    Details
    Publication Date: 2004-10-30
    Description: Space shuttle liftoff dynamics
    Keywords: STRUCTURAL MECHANICS
    Type: SPACE TRANSPORTATION SYSTEM TECNOL. SYMP., VOL. 2 JUL. 1970; P 101-122
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  • 78
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    Relationships and tectonics of the Jg-7 quadrangle of Ganymede (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Craters within the Ganymede Jg-7 quadrangle were divided into seven mappable units. The units represent: (1) irregular or elongate craters, (2) craters with dark ejecta, (3) palimpsests, (4) secondary craters, (5) and craters of young, mature, and old age. Symbols used for crater floors include: (1) flat floors, (2) floors with pits, (3) floora with a central dome or peak, (4) and floors with a central dome and pit. Grooved terrains were divided into five mappable units. Three units of light grooved material represent small, medium, and large grooves, which are arbitrarily divided. The other two units of grooved terrain represent dark grooved materials, and reticulate grooves. Two units of ungrooved dark terrain and two units of ungrooved light terrain were defined. In Galileo Regio, two units were defined repesenting large furrowed grooves, and smaller grooves which are orthogonal to the furrowed grooves.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 314-316
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  • 79
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    Mars paleostratigraphy (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The relative time of emplacement of some major rock units on Mars was recognized to some degree from geologic mapping using Mariner Images. Correlation charts showing the map units and their position in sequence, however, displayed little discrimination in their vertical range of occurrence. A more detailed time-stratigraphy is currently being developed as Viking geologic mapping of the planet progresses.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 296-297
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  • 80
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    Mapping and geological analysis of Mercury radar data (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Although many radar profiles and images of the area within 20 deg of Mercury's equator had been obtained from 1971 to 1981, at both Goldstone and Arecibo radar facilities, surprisingly little geological analysis had been done with these data until recently. Topographic profiles and radar roughness reflectivity images which can be derived from these data will be crucial in completing the geological mapping of Mercury now underway at the U.S. Geological Survey. Processing of available radar data must be completed to establish any systematic relationship between radar reflectivities and roughness, density, dielectric constant, and other related geological parameters. Specific tasks accomplished for these purposes include the following. Documentation was located and searched to establish the type and quantity of Goldstone 12.5 cm radar observations which were available for Mercury. Data has been collected during approximately 50 observation periods from 1971 to 1981. About half of the data, collected during 1972 and 1973, have been processed, but without adequate documentation. A standardized, well-documented procedure for processing and analysis for all Goldstone Earth-based observations of Mercury was established.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 284-286
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  • 81
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    The case for aeolian control of meter-scale surface texture on Mars (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The origin of Mars surface units and the extent of subsequent cratering play key roles in determining surface texture. At scale sizes of 0.1-10 meters, however, there is a growing body of evidence that wind is the dominant force. The direct and indirect evidence which implies that meter-scale surface texture on Mars is controlled by the wind is presented. Since radar is uniquely sensitive to structure on these scales, radio wave scattering data can provide insight on aeolian activity available from no other source.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 273-275
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  • 82
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    Ancient volcano-tectonic structures of the Olympus Mons Region, Mars (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Two old volcano-tectonic collapse structures are exposed north and northeast of the huge shield volcano, Olympus Mons. They are semicircular and were probably low shield volcanoes similar to Alba Patera, but whose central portions have subsided or collapsed. They form the basement upon which younger volcanic materials of Alba Patera Olympus Mons have been emplaced. The oldest structure, Acheron Fossae is over 700 km across and is north of Olympus Mons. It has a surface of considerable relief broken by graben and extensive en echelon and parallel fractures and faults with varied displacements. Acheron Fossae is the most densely cratered in the Olympus Mons region. The structure must have formed very early in martian time. The second is Halex Fossae, northeast of Olympus Mons. Where exposed, it is cut by a series of arcuate grabens that become closer spaced toward its center. The radii of the fractures indicate that the structure may be at least 250 km across and centered beneath the Olympus Plains. Lava flows appear to have issued from some of the arcuate fractures and to have flowed radially away from the center of Halex Fossae. North of Halex Fossae, material of the same age as Halex Fossae overlaps Acheron Fossae.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 293-295
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  • 83
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    Radar-visible wind streaks in the Altiplano of Bolivia (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Isolated knobs that are erosional remnants of central volcanoes or of folded rocks occur in several areas of the Altiplano are visible on both optical and images. The optically visible streaks occur in the immediate lee of the knobs, whereas the radar visible streaks occur in the zone downwind between the knobs. Aerial reconnaissance and field studies showed that the optically visible streaks consist of a series of small ( 100 m wide) barchan and barchanoid dunes, intradune sand sheets, and sand hummocks (large shrub coppice dunes) up to 15 m across and 5 m high. On LANDSAT images these features are poorly resolved but combine to form a bright streak. On the radar image, this area also appears brighter than the zone of the radar dark streak; evidently, the dunes and hummocks serve as radar reflectors. The radar dark streak consists of a relatively flat, smooth sand sheet which lacks organized aerolian bedforms, other than occasional ripples. Wind velocity profiles show a greater U value in the optically bright streak zone than in the radar dark streak.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 271-272
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  • 84
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    Thermal infrared analysis of volcanic surfaces: Mars and Hawaii (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: High spatial resolution data from the Viking infrared thermal mapper (IRTM) are used to examine the Tharsis volcanoes which are situated within a vast area of low thermal inertia material very fine particle size or very high porosity, with the volcanoes having the lowest thermal inertias. Thermal infrared images of the 1823 flow on Kilauea's southwest rift zone show lower thermal inertias near the vent area where shelly pahoehoe is common while individual channelized aa flows with abundant broken pahoehoe slabs are higher thermal inertia. The increase in aa flows to the southeast leads to a general trend of increasing thermal inertias from near vent to distal areas. Martian shield volcanoes have thermal inertias equal to or higher than their surrounding plans when atmospheric effects are removed from the data. The general increase in thermal inertias away from the summit calderas is consistent with the trend of the Hawaiian 1823 flow and may be related to changing lava properties away from the summit.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 266-267
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  • 85
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    Galilean satellite multispectral data base production (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: A photometrically and geometrically reduced data base is being produced for the Galilean Satellites using Voyager Imaging data. The basic data set used is essentially all the useful satellite images returned by Voyager. Each frame was radiometrically calibrated and many are projected into cartographic formats. Mosaics of low, medium and high resolution frames being made for each satellite consist of registered digital images with intensity values scaled through a traceable calibration procedure to normal albedo values. Many of the mosaics are being made in two versions. One version is an albedo version and the second is a maximum discrimination version in which large variations in brightness across the picture are suppressed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 259-260
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  • 86
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    Inversion of topography in Martian highlands terrains (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: One unique feature on Mars is the presence of ring furrows which are apparently produced by inversion of topography at the rims of partially buried craters. Ring furrows are flat-floored trenches, circular in plan view, forming rings 7 to 50 km in diameter. The moat is on the order of 0.5 km deep and 2 to 10 km wide, and it surrounds a flat topped circular mesa or plateau that is 5 to 40 km across. The central plateau is at the same elevation or lower than the surrounding plain outside the ring. The circular nature and size range of ring furrows tend to suggest that these features are related to craters partially buried by younger lava flows. The rings have been formed by preferential removal of the exposed crater rims. Ground ice decay, sapping, or fluvial erosion removed the less resistant, porous material of crater rims while leaving the more resistant volcanic flow material. Differential erosion has thus led to a reversal of topography in which the original positive relief of the rim is reduced to a negative relief feature.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geology Program, 1983; p 228-229
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  • 87
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    Permafrost on Mars: distribution, formation, and geological role (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The morphology of channels, valleys, chaotic and fretted terrains and many smaller features on Mars is consistent with the hypothesis that localized deterioration of thick layers of ice-rich permafrost was a dominant geologic process on the Martian surface. Such ground ice deterioration gave rise to large-scale mass movement, including sliding, slumping and sediment gravity flowage, perhaps also catastropic floods. In contrast to Earth, such mass movement processes on Mars lack effective competition from erosion by surface runoff. Therefore, Martian features due to mass movement grew to reach immense size without being greatly modified by secondary erosional processes. The Viking Mission to Mars in 1976 provided adequate measurements of the relevant physical parameters to constrain models for Martian permafrost.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Programs; p 209-211
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  • 88
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    The erosion of streamlined islands, longitudinal grooves and scour marks: Implications to the origin of the Martian outflow channels (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The diversity of proposed origins for large Martian outflow channels results from the differing interpretations given to the landforms associated with the outflow channels. In an attempt to help limit the possible mechanisms of channel erosion, detailed studies of three of the channel features were done; the streamlined islands, longitudinal grooves and scour marks. This examination involved a comparison of the martian streamlined islands with various streamlined landforms on Earth including those found in the Channel Scabland in large rivers, glacial drumlins, and desert yardangs. The comparisons included statistical analyses of the landform lengths versus widths and positions of maximum width, and an examination of the degree of shape agreement with the geometric lemniscate which was in turn demonstrated to correspond closely with true airfoil shapes. The analyses showed that the shapes of the martian islands correspond closely to the streamlined islands in rivers and the Channel Scabland land. Drumlins show a much smaller correlation. Erosional rock islands formed by glaciers are very much different in shape.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Washington Rept. of Planetary Geol. Programs; p 200-202
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  • 89
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    Dark streaks on talus slopes, Mars (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: High-resolution pictures of talus slopes on Mars show small, dark streaks that characteristically widen downward. These streaks are different from the thin and even streaks of various albedos that stream from cliffs on talus slopes, but gradations between the two streak types occur and not all streaks can be classified with confidence. In order to study the nature and origin of the small, widening, dark streaks, all Viking pictures with a resolution of less than 100 m/pixel were surveyed. To date several hundred streaks were located, but only few are of high enough resolution to be confidently identified as widening downwards. The approximate dimensions of the streaks were measured and their shapes, numbers, position, and spacing on slopes were noted. They were plotted on a topographic map, and their relation to topography, geologic units, and regions of distinct thermal inertia and albedo were studied. Also noted was the season at which images containing streaks were acquired and the direction of illumination. Albedo measurements are in progress. Several streaks can be seen stereoscopically, but none are observed on color images. The observation of small dark streaks on talus slopes on Mars is compatible with an interpretation of their origin as eruptions of small masses of wet debris in places where steep walls intersect aquifers or where seasonal equatorial warming permits the local melting of ground ice.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Programs; p 188-190
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  • 90
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    Freezing of Martian streams under climatic conditions (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The valley networks of Mars are widely believed to have formed at a time when climatic conditions on the planet were significantly different from those that currently prevail. This view arises from the following observations: (1) the valleys form integrated branching networks which suggests fluid drainage, and water is the most plausible fluid, (2) the present atmosphere contains only minute amounts of water, (3) the networks appear to be more akin to terrestrial valleys that are eroded by streams of modest discharges than features that form by catastrophic floods, and (4) small streams of water will rapidly freeze under present climatic conditions. Climatic conditions at the time of formation of the valleys are studied based on the assumption that they were cut by running water.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Programs; p 185-187
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  • 91
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    Venus: The nature of the surface from Venera panoramas (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Images of the surface of Venus obtained by the Soviet Venera 9, 10, 13 and 14 landers are analyzed to provide a basis for understanding the nature of geologic processes operating there. Bedrock is exposed at the Venera 10, 13 and 14 sites and is characterized by semi-continuous, flat polygonal to subrounded patches up to several meters in width. The bedrock surface is often dominated by sub horizontal to horizontal layered plates with thicknesses of several cm and abundant linear and polygonal vertical fractures. Soils (particles 1 cm) are abundant at the Venera 9, 10 and 13 sites, but are uncommon at Venera 14. Features indicative of a strong aeolian influence (moats, dunes, wind tails) are not observed. Several hypotheses are considered for the origin of the bedrock surfaces, and it is concluded that bedrock originated from surface lava flows. The relative freshness of features observed by the Veneras suggests that erosion rates are very low or that some bedrock surfaces are geologically young.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 76-78
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  • 92
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    Venus banded terrain: Evaluation of tectonic models for the origin of banding (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: A tectonic orgin for Venus banded terrain is consistent with band spacing. Both compressional (folding) and extensional models for band formation can fit present observations. Band spacing cannot distinguish among scenarios for global heat loss and for the origin of highland terrain. Tectonic models for band formation indicate that the surface brittle layer in the venus highlands is no more than a few kilometers thick.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 74-75
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  • 93
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    Wind abrasion on Venus: A means for experimental investigations (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: A study to determine the feasibility of conducting experiments to simulate the aeolian environment on Venus as related to wind abrasion was completed. Ideally, such experiments should involve complete investigation of weathering, in which mechanical, thermal, and chemical parameters are taken into account. This is particularly important for Venus, where atmospheric temperatures and pressures at the surface produce an environment which is equivalent to low or medium grade metamorphic conditions on Earth. Details that describe the Venus Aeolian Abrasion Device (VAAD) are included. The VAAD device would enable experiments to be conducted with the same chemistry, temperature, pressure, and other physical properties of the Venus atmosphere near the surface. The proposed device enables the important aeolian parameters to be controlled and monitored, including particle size, velocity, impact-angle and flux, atmospheric pressure, temperature, and gas composition.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 67-68
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  • 94
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    The Borealis Basin of Mars (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Why the lowlands of Mars are concentrated in the Northern Hemisphere and the highlands in the Southern Hemisphere is probably the most fundamental unsolved problem in martian geology. No explanation that accounts both for this asymmetric distribution and for the isostatic equilibrium across the scarp or sloping transition zone dividing the two provinces has been generally accepted; thinning of the lithosphere in the northern hemisphere by internal processes has been suggested. Because other lowland-highland distributions on Mars, Moon, and Mercury are controlled by impact basins, it is proposed that a giant basin formed early in Mars' history has caused the martian hemispheric dichotomy as well.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 110-112
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  • 95
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    Does saturation cratering exist in the solar system? (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: A number of researchers have concluded that saturation equilibrium cratering exists nowhere in the solar system, and therefore that diameter distributions in even the most heavily cratered provinces reveal initial production functions related to impacting bodies. Based on this premise, different populations of impactors are identified in different epochs and regions of the solar system. These hypotheses are clearly crucial to interpreting planetary history and need further independent examination. The production function in the outer solar system may differ from that in the inner solar system, but it is also possible that viscous relaxation of ice craters or immediate flooding of craters that penetrate through an ice lithosphere into watery substrate may explain the greater deficiency of large craters on icy moons. This problem is controversial and needs more study.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of the Planetary Geol. Program, 1983; p 97-99
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  • 96
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    Morphology of fresh craters on Ganymede and the origin of pedestal craters (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Properties of the planetary surface and subsurface can affect the morphology of impact craters. A mechanism was proposed to explain pedestal craters and domed floors within fresh craters on Ganymede. Voyager 1 and 2 images with resolutions = to or 3.2 km/lp were examined and 523 fresh craters were identified. For each crater, the rim and ejecta diameters were measured, and the crater was characterized by ejecta class(es), interior features, floor morphology and target terrain. Of the craters examined, 97 show moderate to prominent doming of the crater floor; 340 craters have continuous ejecta which terminates in a scarp pedestal craters, of which 86 (25%) have a high albedo diffuse deposit beyond the pedestal.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 94-96
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  • 97
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    Mercury: New identification of ancient multi-ring basins and implications for geologic evolution (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: A systematic survey of the entire Mariner 10 coverage of Mercury was performed to determine the number, distribution and dimensions of additional ancient basins on the planet. Ancient multi-ringed basins on Mercury can be recognized by the following criteria: (1) arcs of massif chains and isolated massifs that protrude through younger units, (2) arcuate segments of lobate ridges (rupes) that align with massifs in circular patterns, (3) arcuate scarps that are aligned with ridges and massif, and (4) isolated regions of anomalously high topography within the intercrater regions of heavily cratered terrain. All of the newly identified basins predate the mercurian intercrater plains, previously held to be the oldest geologic unit on the planet. Subsequent structural evolution of various regions was influenced by the presence of these basins. Smooth plains units appear to be more extensive than mapped by Mariner 10 and more than 90 percent of them appear to be basin contained or basin related. The concentration of extensive smooth plains material within and associated with basin structural and depositional environments suggests a volcanic origin for most of this unit, analogous to the lunar maria. Basins appear to provide the basic structural pattern of early terrestrial planetary crusts.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 87-89
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  • 98
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    Venus: Global distribution of Pioneer-Venus radar roughness and reflectivity and global correlation of altimetry, roughness and reflectivity observations (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: An improved version of the Pionner-Venus orbital data was used for a statistical analysis of global radar roughness and (alpha(0)) (rho) reflectivity. Classification maps of the venusian surface are produced in a supervised manner on the basis of statistical and empirical studies of the individual data sets. The primary objective is to assess the degree of homogeneity of surface radar properties within topographic provinces in order to map possible geologic boundaries. Maps were produced by correlating two data sets at a time. Classification of specific regions, such as Ishtar, has demonstrated that distinct geological units can be identified.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 81-82
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  • 99
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    New maps of Lakshmi Planum and eastern Aphrodite, Venus (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: Interest on Venus has centered on three regions; (1) Aphrodite Terra, especially east of the main uplant portion, (2) Ishtar Terra, especially Lakshmi Planum and its bounding scarp and massifs, and (3) Beta Regio-Phoebe Regio. The last region is topographically similar to the East African rift system, and has been inferred to have a similar tectonic origin. The Aphrodite region is part of a 21,000 km long tectonic zone that seems best explained as due to extension, and that may represent hot spots clustered along an incipient divergent plate boundary. The most interesting and complex portion of this tectonic zone is that part of eastern Aphrodite between Thetis Regio and Atla Regio. In contrast, the Lakshmi Planum region has many topographic characteristics suggesting that it is a true continent, and thus indicative of convergence and a thick crust. Detailed topographic contour maps of eastern Aphrodite Terra and of Lakshmi Planum are included.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 71-73
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  • 100
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    Recent comet impacts on the moon: The evidence from spectral reflectance studies (1984)
    In:  CASI
    Details
    Publication Date: 2006-04-06
    Description: The results of analyses of near infrared reflectance spectra are inconsistent with numerous previous interpretations of the Reiner Gamma Formation. These include: (1) nue ardente or volcanic ash deposits, (2) volcanically derived sublimates, (3) high albedo volcanic deposits, and (4) highlands debris emplaced as impact ejecta. These results, strongly suggest that the selective preservation of high albedo features (formed by secondaries) by a local magnetic field enhancement is not a viable hypothesis. The results are generally consistent with, but place constraints on, the cometary impact hypothesis of Schultz and co-workers. While the presence of a magnetized component was not detected in either the bright or dark portions of the Reiner Gamma Formation, this material may be present in amounts under the current detection limits.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Repts. of Planetary Geol. Program; p 59-61
    Format: text
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