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  • 1
  • 2
    Monograph available for loan
    Monograph available for loan
    Garmisch-Partenkirchen : Institut für atmosphärische Umweltforschung der Fraunhofer- Gesellschaft
    Call number: MOP 44829 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 25 S. , graph. Darst.
    Language: English
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 3
    Call number: AWI A3-20-93434-2
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 2
    Type of Medium: Series available for loan
    Pages: 218 Seiten , Illustrationen
    Series Statement: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,2
    Language: German
    Note: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 4
    Journal available for loan
    Journal available for loan
    München : Altop Verlag ; 2007 -
    Call number: Z 19.92410
    Type of Medium: Journal available for loan
    Pages: 30 cm
    ISSN: 1865-4266
    Former Title: Vorg. Nachhaltiges Wirtschaften in Deutschland
    Language: German
    Note: Ungezählte Beil. ab 2010: Special , Ersch. jährl. 4x
    Branch Library: RIFS Library
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  • 5
    Monograph available for loan
    Monograph available for loan
    [Edgecumbe, N.Z.] : A. Muller
    Call number: M 15.89146
    Description / Table of Contents: An account of the results of the 2 March 1987 earthquake in the eastern Bay of Plenty and the aftermath's effects on the people and places on the Rangitaiki Plains
    Type of Medium: Monograph available for loan
    Pages: 223 S., , Ill.
    Language: English
    Branch Library: GFZ Library
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  • 6
    Monograph available for loan
    Monograph available for loan
    London : Penguin Books
    Type of Medium: Monograph available for loan
    ISBN: 9780141985206
    Language: English
    Branch Library: RIFS Library
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  • 7
    Call number: AWI A3-20-93434
    In: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin, Band XXXII, Heft 1
    Type of Medium: Series available for loan
    Pages: 121 Seiten , Illustrationen
    Series Statement: Meteorologische Abhandlungen / Institut für Meteorologie und Geophysik der Freien Universität Berlin 32,1
    Language: German
    Note: Zugleich: Dissertation, Freie Unversität Berlin, [ca. 1963] , INHALTSVERZEICHNIS PROBLEMSTELLUNG UND ZIELSETZUNG 1. BEMERKUNGEN ZUM BEOBACHTUNGSGELÄNDE UND ZUM BEOBACHTUNGSMATERIAL 1.1 Das Beobachtungsgelände 1.2 Das Beobachtungsmaterial 2. HOMOGENITÄTSBETRACHTUNGEN 2.1 Temperatur 2.2 Niederschlag 2.3 Wind 2.4 Sonnenschein und Bewölkung 3. TEMPERATURVERHÄLTNISSE 3.1 Monats- und Jahreswerte 3.2 Tageswerte 3.3 Pentadenwerte 3.4 Häufigkeitsbetrachtungen 3.5 Interdiurne Veränderlichkeit 3.6 Der tägliche Gang 3.7 Vorkommen bestimmter Schwellenwerte 3.71 Frost- und Eistage 3.72 Sommer- und Tropentage 4. DER WASSERGEHALT DER LUFT 4.1 Monats- und Jahreswerte 4.2 Tageswerte 4.3 Häufigkeitsbetrachtungen 4.4 Interdiurne Veränderlichkeit 4.5 Der tägliche Gang 5. BEWÖLKUNGSVERHÄLTNISSE 5.1 Monats- und Jahreswerte 5.2 Tageswerte 5.3 Häufigkeitsbetrachtungen 5.4 Der tägliche Gang 5.5 Heitere und trübe Tage 5.6 Nebel 6. SONNENSCHEIN 6.1 Monats- und Jahreswerte 6.2 Tageswerte 6.3 Der tägliche Gang 7. NIEDERSCHLAGSVERHÄLTNISSE 7.1 Monats- und Jahreswerte 7.2 Niederschlagsbereitschaft 7.3 Tageswerte 7.4 Der tägliche Gang 7.5 Häufigkeitsbetrachtungen 7.6 Niederschlags- und Trockenperioden 7.7 Niederschlag und Wind· 7.8 Schneeverhältnisse 7.81 Schneefall und Schneedecke 7.82 Schneehöhe 7.9 Gewitter 8. WINDVERHÄLTNISSE 8.1 Windrichtung 8.2 Windgeschwindigkeit 8.21 Der jährliche Gang 8.22 Häufigkeitsbetrachtungen 8.23 Sturmtage und Windstillen 8.24 Der tägliche Gang 9.ZUSAMMENFASSUNG VERZEICHNIS DER TEXTTABELLEN VERZEICHNIS DER ABBILDUNGEN LITERATURVERZEICHNIS TABELLENANHANG
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  • 8
    Call number: AWI G6-19-92375
    In: Berichte / Christian-Albrechts-Universität zu Kiel, Institut für Geowissenschaften, Nr. 9
    Type of Medium: Monograph available for loan
    Pages: 278 Seiten , Illustrationen
    ISSN: 0175-9302
    Series Statement: Berichte / Christian-Albrechts-Universität zu Kiel, Institut für Geowissenschaften 9
    Language: German
    Note: Zugleich: Dissertation, Christian-Albrechts-Universität zu Kiel, 1999 , INHALTSVERZEICHNIS 1. Einleitung 1.1 Kenntnisstand und offene Fragen 1.2 Fragestellung und Ziele dieser Arbeit 2. Umweltbedingungen in den Arbeitsgebieten 2.1 Hydrographie, Eisverhältnisse und NAO 2.2 Zur Variation von Wassertiefe und Breite der Dänemarkstraße und zur Vereisung Islands während des letzten Glazials 3. Methoden 3.1 Auswahl der Kernstationen 3.2 Probennahme und Analysen (Übersicht) 3.3 Zur Rekonstruktion von Paläobedingungen im Oberflächenwasser Zur Aussage stabiler Isotopenverhältnisse in planktischen Foraminiferen Zur Messung stabiler Isotopenverhältnisse Zur Massenspektrometrie Zur Rekonstruktion von Oberflächentemperaturen Alkane und Alkohole als Maß für Staubeintrag Eistranspmtiertes Material und vulkanische Aschen 3.4 Zur Rekonstruktion von Paläobedingungen im Zwischen-/ Tiefenwasser Häufigkeit von Cibicides- und anderen benthischen Arten (inkl. Taxonomie) Stabile Isotopenverhältnisse in benthischen Foraminiferen 3.5 AMS 14C-Datierungen Probenreinigung 3. 6 Hauptelementanalysen von vulkanischen Asche-Leithorizonten 3. 7 Geomagnetische Meßgrößen und magnetische Suszeptibiltät 3.8 Techniken zur Spektralanalyse 4. Methodische Ergebnisse 4.1 Zum Einfluß der Probenreinigung auf δ18O-/ δ13C-Werte 4.2 Probleme bei der langfristigen Reproduzierbarkeit von δ18O-Zeitreihen 4.3 Einfluß der Korngröße und Artendefinition planktischer Foraminiferen auf SST-Rekonstruktionen in hohen Breiten 4.4 Vergleich der stabilen Isotopenwerte von Cibicides lobatulus und Cibicidoides wuellerstorfi 5. Stratigraphische Grundlagen und Tiefenprofile der Klimasignale 5.1 Stratigraphische Korrelation zwischen parallel-gekernten GKG- und SL-/KL-Profilen 5.2 Flanktische δ18O-/ δ13C-Kurven, 14C-Alter und biostratigraphische Fixpunkte Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Kern 23351 Vøring-Plateau Kern 23071 Kern 23074 5.3 Benthische δ18O-/ δ13C-Werte in Kern PS2644 5.4 Siliziklastische Sedimentkomponenten: Eistransportiertes Material Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Vøring-Plateau Kern 23071 Kern 23074 5.5 Vulkanische Glasscherben in Kern PS2644: Wind- und Eiseintrag 5.6 Geochemie und Alter einzelner Tephralagen als Leithorizonte Westliches Islandbecken Kern PS2644 Kern PS2646 Kern PS2647 Vøring-Plateau Kern 23071 Kern 23074 5.7 Magnetische Suszeptibilität in den Kernen PS2644, PS2646 und PS2647 Kern PS2644 Kern PS2646 und PS2647 5.8 Geomagnetische Feldintensität und Richtungsänderungen in Kern PS2644 5.9 Variation von Planktonfauna und -flora Westliches Islandbecken: Kern PS2644 Kern PS2646 und PS2647 Vøring-Plateau: Kern 23071 und 23074 5.10 Benthische Foraminiferen in Kern PS2644 6. Entwicklung von Temperatur und Salzgehalt nördlich der Dänemark-Straße 6.1 Variation der Oberflächentemperatur nach Planktonforaminiferen 6.2 Variation der Oberflächentemperatur nach Uk37 6.3 Variation der Oberflächensalinität 7. Die Feinstratigraphie von Kern PS2644 als Basis für eine Eichung der 14C-Altersskala 22 - 55 ka 7.1 Korrelation zwischen den Klimasignalen in Kern PS2644 und der GISP2-Klimakurve zum Kalibrieren der 14C-Alter und Erstellen eines Altersmodells Tephrachronologische Marker Korrelationsparameter und -regeln Sonderfälle/ Probleme bei der Korrelation 7.2 Alters-stratigraphische Korrelation der Klimakurven von Kern 23071 und 23074 7.3 Variation der Altersanomalien zwischen 20 und 55 14C-ka 7.4 Variabilität des planktischen 14C-Reservoiralters in Schmelzwasserbeeinflußten Seegebieten Variation der planktischen 14C-Alter unmittelbar an der Basis von Heinrich-Ereignis 4 Unterschiede zwischen planktischen und benthischen 14C-Altern in der westlichen Islandsee. Zur Erklärung der inversen Altersdifferenzen 7.5 Differenz zwischen 14C- und Kalenderalter: Zeitliche Variation unter Einfluß des Erdmagnetfeldes - Modell und Befund 7.6 Sedimentationsraten der Kerne 23071, 23074 und PS2644 nach dem GISP2-Altersmodell Vøring-Plateau: Kerne 23071 und 23074 Südwest-Islandsee: Kern PS2644 8. Klimaoszillationen im Europäischen Nordmeer in der Zeit und Frequenzdomäne 8.1 "Der Einzelzyklus" in den Klimakurven von Kern PS2644 8.2 Zur Veränderlichkeit der Warm- und Kaltextreme sowie Zyklenlänge Besonderheiten in der Zyklenlänge Variation der Kalt-(Stadiale) Variation der Interstadiale 8.3 Periodizitäten der Klimasignale im Frequenzband der D.-Oe.-Zyklen. Der D.-Oe.-Zyklus von 1470 J., seine Multiplen und harmonischen Schwingungen Weitere Frequenzen: 1000-1150 Jahre- und 490- 510 Jahre-Zyklizitäten Höhere Frequenzen im Bereich von Jahrhunderten und Dekaden 8.4 Phasenbeziehungen und (örtliche) Steuemngsmechanismen der Dansgaard-Oeschger-Zyklen 9. Schlußfolgerungen Danksagung Literaturverzeichnis Anhang
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  • 9
    Call number: (DE-599)GBV03709842X
    Type of Medium: Monograph available for loan
    Language: German
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 10
    Call number: 3/S 07.0034(2017)
    In: Annual report
    Type of Medium: Monograph available for loan
    Pages: 51 Seiten
    ISSN: 1865-6439 , 1865-6447
    URL: Volltext  (kostenfrei)
    Parallel Title: Annual report ... / Helmholtz Association of German Research Centres
    Language: English
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  • 11
    Call number: IASS 22.95033
    Type of Medium: Monograph available for loan
    Pages: 378 S , 225 mm x 135 mm
    ISBN: 3899421876 , 978-3-89942-187-3
    Series Statement: Edition panta rei
    Language: German
    Note: Zugl.: Marburg (Lahn), Univ., Habil.-Schr., 2004 u.d.T.: Gutmann, Mathias: Die Medialität des Erfahrens
    Branch Library: RIFS Library
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  • 12
    Monograph available for loan
    Monograph available for loan
    Madrid : Secc
    Call number: PIK N 456-17-90913
    Type of Medium: Monograph available for loan
    Pages: 536 Seiten
    Series Statement: Ministerio de Transportes Turismo Y Comunicaciones : Publicación Serie A 114
    Parallel Title: 1,1=6; 2,1=13 von Publicaciones / D / Ministerio del Aire, Subsecretaria de Aviación Civil, Servicio Meteorológico Nacional
    Language: Spanish
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 13
    Monograph non-lending collection
    Monograph non-lending collection
    Leiden : Nijhoff ; 1.2009 -
    Call number: IASS 17.92082
    Type of Medium: Monograph non-lending collection
    ISSN: 1876-8814
    Language: English
    Branch Library: RIFS Library
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  • 14
    Monograph available for loan
    Monograph available for loan
    Leningrad : Gidrometeorolog. Izd.
    Call number: MOP 33767
    Type of Medium: Monograph available for loan
    Pages: 663 S.
    Language: Russian
    Note: In kyrill. Schr., russ.
    Location: MOP - must be ordered
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  • 15
    Journal available for loan
    Journal available for loan
    Tübingen : Mohr Siebeck ; 1.1884 - 48.1931; N.F. 1.1932/33 - 10.1943/44(1945),3; 11.1948/49(1949) -
    Call number: ZS 22.95039
    Type of Medium: Journal available for loan
    Pages: Online-Ressource
    ISSN: 1614-0974 , 0015-2218 , 0015-2218
    Language: German , English
    Note: N.F. entfällt ab 57.2000. - Volltext auch als Teil einer Datenbank verfügbar , Ersch. ab 2000 in engl. Sprache mit dt. Hauptsacht.
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  • 16
    Call number: MOP 19538/1d-6d
    Type of Medium: Monograph available for loan
    Pages: 111 S.
    ISSN: 0486-2287
    Language: Russian
    Note: In kyrill. Schr.
    Location: MOP - must be ordered
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  • 17
    Call number: Z 06.0500
    Type of Medium: Journal available for loan
    Pages: 30 cm
    ISSN: 1824-7741
    Former Title: Vorgänger Geologisch-paläontologische Mitteilungen, Innsbruck
    Language: German , English
    Note: Ersch. unregelmäßig , Beiträge teilweise in Englisch
    Branch Library: GFZ Library
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  • 18
    Monograph available for loan
    Monograph available for loan
    Stuttgart : Schweizerbart Science Publishers ; Volume 1, number 1 (1978)-
    Call number: M 18.91571
    Type of Medium: Monograph available for loan
    Pages: 134 Seiten
    ISSN: 2363-7196
    Series Statement: Global tectonics and metallogeny : special issue Vol. 10/2-4
    Classification:
    Tectonics
    Parallel Title: Erscheint auch als Global tectonics and metallogeny
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 19
    Call number: IASS 15.89494
    Type of Medium: Monograph available for loan
    Pages: Losebl.-Ausg.
    Edition: Stand: Oktober 2010
    ISBN: 9783768501828
    Language: German
    Branch Library: RIFS Library
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  • 20
    facet.materialart.
    Unknown
    Wien : [Verlag nicht ermittelbar] ; 22.1910/25(1925),3; 23.1914/31(1929/31),2-3; 24.1927,1-2; 25.1939,1; 26.1948,1; 27.1971-Band 76 (2022)
    Call number: S 91.1179
    ISSN: 0375-5797 , 0378-0864
    Parallel Title: 35=2 von European Conodont Symposium (ZDB) Guidebook, abstracts / European Conodont Symposium
    Parallel Title: 41=2 von Workshop on Agglutinated Foraminifera (ZDB) Proceedings / Workshop on Agglutinated Foraminifera. Geologische Bundesanstalt
    Parallel Title: 39=3 von International Nannoplankton Association Proceedings of the ... International Nannoplankton Association conference
    Parallel Title: 60=11 von Deutsche Gesellschaft für Geowissenschaften. Fachsektion GeoTop Internationale Jahrestagung der Fachsektion GeoTop der Deutschen Gesellschaft für Geowissenschaften
    Former Title: Vorg. Geologische Reichsanstalt Abhandlungen der Kaiserlich-Königlichen Geologischen Reichsanstalt, Wien
    Subsequent Title: Fortgesetzt durch Abhandlungen
    Language: German
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  • 21
    Publication Date: 2021-03-29
    Description: In Schleswig-Holstein wurden in den zurückliegenden vier Jahrzehnten detaillierte Untersuchungen an Probenmaterial aus Aufschlüssen und Kernbohrungen durchgeführt. Analysen der Kiesfraktion und von ‚Leitgeschieben‘ aus glazialen Ablagerungen wurden für die Interpretation und Korrelation genutzt. Glazifluviatile Sedimente wurden TL- und OSL-datiert. Zusammen mit der stratigraphischen Information aus organischen Ablagerungen konnte eine neue klimatostratigraphische Tabelle des Pleistozäns für Schleswig-Holstein mit revidierter Gliederung des Mittel- und Oberpleistozäns erstellt werden. Die Pollensequenz der ältesten pleistozänen Warmzeit (Warmhörn-Thermomer) wird erstmals veröffentlicht. Das Unterpleistozän (Altpleistozän) und das untere Mittelpleistozän sind bei Lieth und bei Gorleben (Niedersachsen) in zwei kontinuierlichen Schichtfolgen vollständig dokumentiert, abgelagert in einem Wechsel von warmen und kalten Klimaphasen. Der oberste Abschnitt der Abfolge von Lieth und der unterste der Abfolge von Gorleben überlappen. Die kombinierte Abfolge bietet ein einzigartiges Referenzprofil für Korrelationen innerhalb Europas. Bisher wurden in Schleswig-Holstein nur drei Kaltzeiten mit Vergletscherungen nachgewiesen, Elster- und Saale-Kaltzeit im oberen Mittelpleistozän und die Weichsel-Kaltzeit im Oberpleistozän. Eine mögliche prä-elsterzeitliche Vergletscherung wird diskutiert. Die Holstein-Warmzeit wird mit MIS 9e korreliert. Das Saale umfasst einen unteren Abschnitt mit nicht-glaziären Kaltzeiten und mit Warmzeiten, der ‚Wacken-Warmzeit‘ (=Dömnitz) und der ‚Leck-Warmzeit‘, korreliert mit MIS 7e und MIS 7c, und einen glaziären oberen Abschnitt. Während des Weichsel gab es wahrscheinlich zwei Phasen mit Vergletscherung, die erste im frühen Mittelweichsel (‚Ellund-Phase‘, spätes MIS 4 oder/und frühes MIS 3), die zweite im oberen Weichsel (MIS 2). Die weichselzeitliche Vergletscherung Schleswig-Holsteins endet um 15 ka BP, als großflächige stagnierende Eisflächen und Toteismassen des Jungbaltischen Gletschervorstoßes (‘Mecklenburg-Phase’) schmolzen.
    Description: research
    Keywords: 551 ; pleistocene ; schleswig-holstein ; pléistocène ; correlations ; climato-stratigraphic table
    Language: English
    Type: article , Verlagsversion
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  • 22
    Publication Date: 2021-05-06
    Description: As part of the lagoon barrier accretions plain characterizing the NW coast of the Peloponnese, the Kotychi Lagoon is believed to have formed in the prograding delta of the Palaeo-Peneus River over 7000 years ago. Geochemical/sedimentological proxies-data (XRF, grain size, OC-, IC-, C/N-analysis) combined with Bayesian age-depth-modeling revealed that from 8500 to 8000 cal BP marine conditions were prevailing. Around 8000 cal BP, a short-lived sequence of coastline progradation and barrier accretion created lagoonal conditions. Thus, the first chronological control for the onset of lagoon formation in coastal Elis is presented. Pronounced lagoonal conditions developed approximately 6300 cal BP, simultaneously to the period of circum-Mediterranean lagoon formation. A rapidly varying sedimentary record indicates a phase of geomorphological instability between 5200 and 3500 cal BP terminating with the erosional unconformity of a river channel. This evolution reflects a two-phase development: (1) Early Holocene morphology was controlled by the postglacial sea level rise; (2) with receding of the ice sheets by mid-Holocene, the preeminent role of the eustatic signal was overwhelmed giving local and regional processes, such as human-induced soil erosion and climatic forcing an accentuated role. Thus, the evolution of the Elean coastline shows analogies to circum-Mediterranean lagoon formation.
    Description: research
    Keywords: 551.7 ; geochemistry ; lagoon ; sea level change ; Greece ; Holocene coastal evolution ; XRF
    Language: English
    Type: article , Verlagsversion
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  • 23
    Publication Date: 2021-03-29
    Description: In Schleswig-Holstein detailed petrographical and palynological studies were undertaken with samples from exposures and core drillings examined over the last four decades. Analyses of the gravel fraction and ‘indicator rocks’ of glacial deposits were used for stratigraphical interpretations and correlation. Glaciofluvial sediments were dated by TL and OSL. Combined with the stratigraphical information from organic deposits, a new climato-stratigraphic table of the Pleistocene for Schleswig-Holstein with a revised subdivision of the Middle and Late Pleistocene could be established. The pollen sequence of the oldest Pleistocene warm phase (Warmhörn-Thermomer) is published for the first time. The complete Early Pleistocene and lower Middle Pleistocene stratigraphical sequence is documented at Lieth and at Gorleben (Lower Saxony) in two continuous successions of organic beds developed during warm phases alternating with cold phase deposits. The uppermost part of the Lieth succession and the lowermost part of Gorleben overlap. The combined succession provides a unique reference for correlations through Europe. No more than three cold stages involving glaciation are demonstrated to exist currently in Schleswig-Holstein, the Elsterian and the Saalian in the upper Middle Pleistocene, and the Weichselian in the Late Pleistocene. A possible pre-Elsterian glaciation is discussed. The Holsteinian is correlated with MIS 9e. The Saalian includes a lower part with non-glacial cold phases and warm phases, the ‘Wacken-Warmzeit’ (=Dömnitz) and the ‘Leck-Warmzeit’ correlated with MIS 7e and MIS 7c respectively, and a glacial upper part. During the Weichselian probably two phases of glaciation existed, the first in the early Middle Weichselian (‘Ellund-Phase’; late MIS 4 or/and the early MIS 3), the second in the Upper Weichselian (MIS 2). The Weichselian glaciation of Schleswig-Holstein ends around 15 ka BP when huge stagnant and dead ice masses of the Young Baltic glacier advance (‘Mecklenburg-Phase’) melted.
    Description: research
    Keywords: 551 ; pleistocene ; schleswig-holstein ; pléistocène ; correlations ; climato-stratigraphic table
    Language: English
    Type: article , Verlagsversion
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  • 24
    Publication Date: 2021-03-29
    Description: The Sophie’s Cave in Upper Franconia, Bavaria (South Germany) eroded into Upper Jurassic reef dolomite and is a perfect model including all three stages of cave development ranging from a 1. ponor cave, to 2. intermediate periodically flooded cave to 3. dry cave. The key position of the cave along the Ahorn Valley, a side valley of the larger Wiesent River Valley, allow a cave genesis and evolution reconstruction which started in the Pliocene. The main refill took place in the Quaternary with Middle to Late Pleistocene river terrace sediments, present as relict sediments. Seven valley genesis stages between Pliocene to final Late Pleistocene can be separated in elevations of 440 to 375 meters a.s.l. The lowering of the Ailsbach River in the Ahorn Valley is important to understand the accessibility of caves for Pleistocene animals and Palaeolithic humans in different valley positions and elevations during different times in Upper Franconia, and the natural erosive opening/closing of cave entrances towards drainage valleys.
    Description: research
    Keywords: 551 ; bavaria ; cave ; ice age ; Ahorn Valley ; Alsbach River ; terrace evolution ; bears ; humans ; Neanderthals ; Late Palaeolithics
    Language: English
    Type: article , Verlagsversion
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  • 25
    Publication Date: 2021-03-25
    Description: conference
    Keywords: 343.4307869 ; 910 ; QGB 406 ; Kongress ; Deutschland : Baugesetzbuch ; Greifswald 〈2006〉 ; Umweltrecht ; Angewandte Geographie der Bundesrepublik Deutschland ; 86.60 ; 86.62
    Language: German
    Type: anthology , publishedVersion , anthology
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  • 26
    Publication Date: 2021-05-06
    Description: In the glaciation history of Switzerland (Preusser, Graf, Keller, Krayss & Schlüchter 2011) is shown that two (possibly three) older glacials had happened before the well known glacials Würm = Birrfeld and Riss = Beringen. These are the Habsburg- and the Möhlin-Glacials. In this paper selected key regions in Southern Germany are analysed litho- and morphostratigraphically. This analysis enables us to find the two older glacials proved also at the Rhine Glacier. The period of the „Deckenschotter“-glaciations is followed by a time of striking fluvial erosion (MPR = Middle Pleistocene Reorganisation) in the region of Lake Constance. It is demonstrated that the glaciers of the subsequent Middle Pleistocene glacials exarated the overdeepened Lake Constance basin. The oldest of these „Becken-Glacials“ is named „Größtes Rheinisches Glazial“ (GRG) = Möhlin in the northern part of Switzerland. It corresponds to the Hosskirch introduced by Ellwanger (2003). In the northern Rhine Glacier region the most external glacial deposits belong to this glaciation. Earlier in the northwestern part these deposits are interpreted as Riss-Glacial, but in the northeast as Mindel-Glacial. The GRG evidently must be older than Riss, but younger than the „Younger Deckenschotter“. Therefore Mindel in the northeastern region would be a Becken-Glacial. In the northern part of Switzerland the Habsburg-Glacial nearly reached the extension of the Würm-Glacial. In the region of the Rhine Glacier references and/or indications of the Habsburg-Glacial could be found in a band width corresponding to the Würm, but outside it as well. In the northern region of the Rhine Glacier this vast glaciation has not been discovered up to now because the subsequent glacials Riss and Würm mainly destroyed its relics. To classify the „Greatest Rhine Glacial“ GRG as well as the Habsburg-Glacial chronologically interpolated interglacials with time marks can be applied: IG Unterpfauzenwald – GRG – IG Holstein – Habsburg – IG Meikirch – Riss – IG Eem. Accordingly a temporal classification for the glacials results as follows: (GRG) +350 ka BP (MIS 10), Habsburg +250 ka BP (MIS 8), Riss +150 ka BP (MIS 6).
    Description: research
    Keywords: 551.7 ; glacial deposits ; chronostratigraphy ; alpine foreland ; glacial drainage ; Rhine Glacier
    Language: German
    Type: article , Verlagsversion
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  • 27
    Publication Date: 2021-05-06
    Description: The Zoolithen Cave, in the Wiesent River Valley of Upper Franconia, Bavaria, South Germany, has a very long excavation history. The site is of international paleobiological importance as the Type site for five Pleistocene top predators (cave bear, Ice Age hyena, lion, wolf, dhole). This large cave system has developed in three elevations and preserves three fluvial sedimentary sequences including two speleothem genesis phases representing changing ponor, dry and wet stages from the Oligocene/Miocene (Neogene), over the Pliocene/Early Pleistocene to Late Pleistocene. The cave bear Ursus deningeri used the cave as den during the MIS 6–9 (Holsteinian interglacial-Saalian glacial). Single P4 tooth and skull shape analyses (“= cave bear clock”) date different cave bear species (U. spelaeus eremus/spelaeus, U. ingressus) within the Late Pleistocene (MIS 3–5d). Finally the bones of other Pleistocene megamammals were washed from two former cave entrances at elevations of about 455 m a.s.l. up to 30 meters deep into lower elevation cave parts, during the Last Glacial Maximum (Post-U. deningeri times or Postglacial), -historically believed to be the result of the “great deluge”. The young “river terrace dolomite gravels” which occur as relic sediments at elevations of about 455 a.s.l in several caves around Muggendorf cannot be explained by natural erosion/river terrace stratigraphy, and must relate to an uncertain glacial context. Finally Iron Age (La Tène) humans left secondary burials (human skulls and long bones with pottery and after-life food animal donations) only in the first deep vertical shaft (Aufzugsschacht) similar to the situation in the nearby Esper’s Cave.
    Description: research
    Keywords: 551.7 ; stratigraphy ; Holotype skulls ; bone taphonomy ; excavation history of the Zoolithen Cave ; new theory about Esper's "great deluge"
    Language: English
    Type: article , Verlagsversion
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  • 28
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    Universitätsverlag Göttingen, Göttingen
    Publication Date: 2021-03-29
    Description: This volume contains papers presented in part at a symposium held in May 2012 at Göttingen University, to honour Professor Joachim Reitner for his numerous contributions to the fields of geobiology, geology, and palaeontology. Our present volume reflects the breadth of Reitnerś interests and accomplishement with tributes and research or review papers by his students, former students, collaborators, and friends. The symposium was held in conjunction with Joachim Reitnerś 60th birthday.
    Description: research
    Keywords: 560 ; VU 500 ; VV 500 ; Festschriften {Geobiologie} ; Festschriften {Paläontologie} ; 38.20
    Language: English
    Type: anthology , publishedVersion
    Format: PDF-Datei: 201 S., ca. 20 MB
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  • 29
    Publication Date: 2021-05-06
    Description: Exotic ice-rafted debris from the breakup of ice-dammed glacial lakes Missoula and Columbia is common in slackwater areas along the 1,100-km route for outburst floods in the northwestern US. A detailed analysis was performed at Rattlesnake Mountain, which lay beyond the limit of the former ice sheet, where an exceptionally high concentration of ice-rafted debris exists midway along the floods’ path. Here floodwaters temporarily rose to 380 m elevation (forming short-lived Lake Lewis) behind the first substantial hydraulic constriction for the outburst floods near Wallula Gap. Within the 60 km2 study area more than 2,100 erratic isolates and clusters, as well as bergmounds were recorded. Three quarters of erratic boulders are of an exotic granitic composition, which stand in stark contrast to dark Columbia River basalt, the sole bedrock in the region. Other exotics include Proterozoic quartzite and argillite as well as gneiss, diorite, schist and gabbro, all once in direct contact with the Cordilleran Ice Sheet to the north. Most ice-rafted debris is concentrated between 200 and 300 m elevation. Far fewer erratics and bergmounds lie above 300 m elevation because of the preponderance of less-than-maximum floods. Plus, larger deep-rooted icebergs were forced to ground farther away from the ancient shorelines of transient Lake Lewis. As floodwaters moved across the uneven surface of Rattlesnake Mountain, many erratic-bearing icebergs congregated into pre-existing gullies that trend crosswise to flood flow.
    Description: research
    Keywords: 551.7 ; ice-rafted debris ; erratic ; bergmound ; Missoula floods ; Wallula Gap ; Lake Lewis ; glacial Lake Missoula ; Wisconsin Glaciation ; Columbia River basalt
    Language: English
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  • 30
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    Institut für Geographie und Geologie der Ernst-Moritz-Arndt Universität Greifswald.
    Publication Date: 2021-03-25
    Description: thesis
    Keywords: 910 ; QGB 224 ; QGA 002 ; 38.45 ; 74.20
    Language: German
    Type: monograph , publishedVersion
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  • 31
    Publication Date: 2021-10-27
    Description: thesis
    Keywords: 910 ; QGB 402 ; VAR 800 ; VOB 000 ; VEB 210 ; Spätglazial ; Holozän ; Parabraunerde ; Entstehung ; Hochschulschrift ; Physische Geographie der Bundesrepublik Deutschland ; Periglazialerscheinungen ; Bodenökologie ; Deutschland {Geologie} ; 38.55 ; 38.28 ; 38.63 ; 38.49
    Language: German
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  • 32
    Publication Date: 2021-10-27
    Description: In Anlehnung an den Forschungsschwerpunkt der Universität beschäftigt sich der Lehrstuhl für Regionale Geographie mit der Analyse von Wirtschafts- und Gesellschaftsstrukturen vor dem Hintergrund der langfristigen Regionalentwicklung. Hierzu werden Strategien und Maßnahmen beleuchtet, welche der Infrastrukturentwicklung dienen und überdies zu einer Optimierung der Programmräume von Behörden sowie Unternehmen führen sollen. Der Untersuchungsgegenstand ist in Mecklenburg-Vorpommern, Nord- und Osteuropa sowie Russland zu verorten. Mit dem hier vorgelegten Band 49 der „Greifswalder Geographischen Arbeiten“ geben wir einen Einblick in unsere aktuellen Projekte am Lehrstuhl für Regionale Geographie. Mit der Auswahl an Themen ist gleichzeitig das Ziel verbunden, die inhaltliche Ausgestaltung des Lehrstuhls einem breiteren Publikum darzulegen und zusätzlich den wissenschaftlichen Diskurs zu bereichern. Dabei werden in den Beiträgen auch Sachverhalte und Kausalitäten gezeigt, die oftmals eine ungewohnte Sichtweise ermöglichen und somit eingeschliffene Denkweisen in Frage stellen.
    Description: ISBN: 978-3-86006-414-6
    Description: research
    Keywords: 910 ; QGB 360 ; QGG 560 ; Bundesrepublik Deutschland (Geographie) ; Europäisches Rußland (Geographie) ; Infrastruktur ; ländlicher Raum ; Regionalentwicklung ; Gemeindefinanzen ; Schulentwicklung ; Mecklenburg-Vorpommern ; Russland ; Murmansk
    Language: German
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  • 33
    Publication Date: 2021-12-09
    Description: conference
    Keywords: 910 ; QGB 654 ; Mitteldeutschland ; Naturraum ; Geographie ; Landschaftsentwicklung ; Kulturgeographie Mitteldeutschlands ; 74.77 ; 74.20
    Language: German
    Type: map , publishedVersion , anthology
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  • 34
    Publication Date: 2021-12-09
    Description: thesis
    Keywords: 910 ; QGB 656 ; QGB 606 ; QGG 230 ; Vorpommern ; Woiwodschaft Westpommern ; Grenzgebiet ; Regionalentwicklung ; Europäische Union ; Erweiterung ; Osteuropa ; Hochschulschrift ; Angewandte Geographie Mitteldeutschlands ; Angewandte Geographie Ostdeutschlands {Geographie} ; Angewandte Geographie Polens ; 74.19 ; 74.71
    Language: German
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  • 35
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    Univ. Greifswald
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QFG 620 ; Umweltschutzplanung, UVP {Raumordnung und Raumplanung} ; 86.60 ; 86.62
    Language: German
    Type: map , publishedVersion , anthology
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  • 36
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    Ernst-Moritz-Arndt-Univ. Greifswald
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QGB 571 ; VPB 200 ; Mecklenburg-Vorpommern ; Landschaftsentwicklung ; Bodenkunde ; Teilfragen zu Mecklenburg-Vorpommern {Geographie} ; Deutschland {Bodenkunde} ; 38.45 ; 38.60
    Language: German
    Type: map , publishedVersion , anthology
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  • 37
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QGB 221 ; QGG 100 ; VDI 220 ; VAT 110 ; olozän ; Ostseeküste Südwest ; Geologie ; Deutsches Ostseeküstengebiet {Geographie} ; Teilräume von Osteuropa {Geographie} ; Holozän ; Küstendynamik und Küstenmorphologie einzelner Regionen {Geologie} ; 38.55 ; 74.19
    Language: English
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  • 38
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    Ernst-Moritz-Arndt-Univ. Greifswald
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 551.45 ; QGB 573 ; Vorpommern ; Greifswald Region ; Landschaftsökologie ; Landesteile Mecklenburg-Vorpommerns {Geographie} ; 42.90 ; 38.55
    Language: German
    Type: map , publishedVersion , anthology
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  • 39
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; QGG 850 ; Biosphärenreservat Issykkul ; aturraum ; Geoökologie ; Kirgisien {Geographie} ; 74.21 ; 43.31
    Language: German
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  • 40
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    Institut für Geographie und Geologie der Ernst-Moritz-Arndt Universität Greifswald
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; UKC 130 ; Physikalische und chemische Eigenschaften {Regionale Ozeanologie, Ostsee}
    Language: German
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  • 41
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    Ernst-Moritz-Arndt-Univ. Greifswald
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QBD 200 ; Geographie ; Datenauswertung ; Statistische Methodenlehre, Quantitative Geographie {Geographie} ; 74.03
    Language: German
    Type: map , publishedVersion , anthology
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  • 42
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    Institut für Geographie und Geologie der Ernst-Moritz-Arndt Universität Greifswald
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; UKC 190 ; UDB 140 ; ing 191.3 ; Ostsee ; Zufluss ; Talsperre ; Abflussregime ; Hochschulschrift ; Sonstiges {Regionale Ozeanologie, Ostsee} ; Wasserhaushalt {Hydrologie, Deutschland} ; 38.85 ; 38.88 ; 38.90
    Language: German
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  • 43
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; QGB 571 ; VAR 911 ; AR 400 ; Mecklenburg-Vorpommern ; Jungpleistozän ; Holozän ; Glazialmorphologie ; Hochschulschrift ; Teilfragen zu Mecklenburg-Vorpommern {Geographie} ; Mitteleuropa {Glazialgeologie} ; Glazialmorphologie ; 74.11 ; 74.07 ; 74.31 ; 38.49 ; 74.20
    Language: German
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  • 44
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QA 520 ; QEK 000 ; Mecklenburg-Vorpommern ; Kulturlandschaft ; Forschung ; Historische Geographie ; Kartographie ; Geschichte : 1603-2001 ; Festschriften für einzelne Personen {Geographie} ; Historische Geographie ; 74.11 ; 74.07 ; 74.31
    Language: German
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  • 45
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    Ernst-Moritz-Arndt-Univ. Greifswald
    Publication Date: 2021-10-26
    Description: research
    Keywords: 551.45 ; QGB 571 ; Mecklenburg-Vorpommern ; Geoökologie ; Aufsatzsammlung ; Teilfragen zu Mecklenburg-Vorpommern {Geographie} ; 38.95 ; 74.20
    Language: German
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  • 46
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; UDB 312 ; VAU 000 ; VEB 213 ; Mecklenburg-Vorpommern ; See ; Kieselalgen ; Paläolimnologie ; Hochschulschrift ; Oberflächenwasser {Hydrologie, Nord- und Nordostdeutschland} ; Paläolimnologie {Geologie} ; Brandenburg, Sachsen-Anhalt und Mecklenburg-Vorpommern {Geologie} ; 38.88 ; 42.93
    Language: German
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  • 47
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QFG 620 ; Kongress ; Deutschland : Baugesetzbuch ; Greifswald 〈2005〉 ; Umweltrecht ; Umweltschutzplanung, UVP {Raumordnung und Raumplanung} ; 86.60 ; 86.62
    Language: German
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  • 48
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 551.48 ; UDB 312 ; VAR 800 ; orddeutschland ; Jungquartär ; Glazialmorphologie ; Oberflächengewässer ; Kongress ; Kongress / Hohenzieritz 〈2002〉 ; Oberflächenwasser {Hydrologie, Nord- und Nordostdeutschland} ; Periglazialerscheinungen ; 38.16 ; 38.45 ; 74.20
    Language: German
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  • 49
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 551.48309431869 ; 551.48909431869 ; 910 ; UDB 412 ; VAN 400 ; Sachsen-Anhalt ; Mulde Fluss ; Hochwasser ; Sohle ; Wasserbau ; Sedimenttransport ; Hochschulschrift ; Oberflächenwasser {Hydrologie, Mitteldeutschland} ; Transport durch fließendes Wasser {Geologie} ; 38.88
    Language: German
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  • 50
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QGA 200 ; QEE 000 ; Europäische Union ; Peripherer Raum ; Tourismus ; Kongress ; Greifswald 〈2006〉 ; Europäische Union {Geographie} ; Geographie von Freizeit und Tourismus ; 74.09 ; 74.19
    Language: English
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  • 51
    Publication Date: 2021-10-26
    Description: conference
    Keywords: 910 ; QBD 700 ; QBD 200 ; Angewandte Geographie ; Geoinformationssystem ; Kongress ; Geoinformationssysteme {Geographie} ; Statistische Methodenlehre, Quantitative Geographie {Geographie} ; 74.03 ; 74.48
    Language: German
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  • 52
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    Ernst-Moritz-Arndt-Univ. Greifswald | Univ. Teilw. zugl.: Greifswald
    Publication Date: 2021-10-26
    Description: thesis
    Keywords: 910 ; QGB 573 ; Regionalentwicklung ; Hochschulschriftorpommern ; Vorpommern ; Landesteile Mecklenburg-Vorpommerns {Geographie} ; 74.08 ; 74.12 ; 74.20 ; 74.71
    Language: German
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  • 53
    Publication Date: 2022-07-08
    Description: Für den Zeitraum von Oberjura bis heute können sechs Deformationsereignisse mit kompressiver Beanspruchung rekonstruiert werden (DI bis DVI). Sie werden dem Malm, der höheren Unterkreide, dem Unter- bis Mitteleozän, dem Oberoligozän, dem frühen Miozän und dem plio-pleisto-holozänen Zeitabschnitt zugeordnet. Jede dieser Deformationen wird in ihren strukturellen Auswirkungen im Bereich des Untersuchungsgebietes beschrieben und mithilfe von Kartendarstellungen illustriert. An Kompressionsstrukturen entstanden Horizontalstylolithen, „Slickolite striae grooves“, moderate Verfaltungen und vereinzelte Aufschiebungen. Scherende Beanspruchungen werden durch Slickolites, Scherflächen und Riedelflächen sowie durch Blattverschiebungen (Verschiebungsweiten bis etwa 3,5 km) und Pullapart- Gräben dokumentiert. Die kinematische Bedeutung der jeweiligen Phänomene wird im Zusammenhang mit überregionalen Paläostressfeldern und den zugrunde liegenden plattentektonischen Vorgängen in Mitteleuropa ausgewertet. Im Strukturbefund der einzelnen Deformationen zeigen sich variierende Stärken der Beanspruchung und verschiedene rotierende Veränderungen der Stressfeld-Ausrichtungen. Im Zuge der unterschiedlich angreifenden Stressfelder kam es zu einer mehrfachen mechanischen Aktivierung von Bruchflächen. Eine zunehmende Ausreifung des strukturellen Inventars des Deckgebirges bildet sich ab. Die unterkretazische Deformation DII wird gegenüber den Darlegungen in Teil III nicht in die unterste sondern in die höhere Unterkreide gestellt. Generell zeichneten sich unterschiedlich konfigurierte alte und neue Senkungsgebiete ab. Auch sie beeinflussten das Bewegungsmuster. Bei den jüngeren, seit dem oberen Oligozän abgelaufenen Deformationen DIV bis DVI kam es zu einer Wechselwirkung der horizontalen Kompression mit den vertikalen Relativbewegungen des Rheinischen Schildes („Plateau Uplift“). Randstreifen zwischen den damaligen Hebungs- und Senkungszonen sind häufig von Pull-apart-Strukturen gesäumt. Die jüngste Deformation DVI ist im Untersuchungsgebiet durch einen zeitlich wechselhaften Verlauf gekennzeichnet. Das ehemalige plio-pleistozäne Stressfeld mit seinem Bewegungsmuster weicht vom heutigen – noch stärker regional differenzierten – Stressfeld ab.
    Description: Abstract: In the southeastern Trier-Luxemburg Embayment six events of compressive deformation have taken place since Upper Jurassic. In this paper they are re - constructed and numbered as DI to DVI. They are assigned to the Upper Jurassic, the late Lower Cretaceous, the lower to middle Eocene, the Upper Oligocene, the lower Miocene and finally to the subrecent plio-pleisto-holocene time span. The structural results of each deformation in the study area are described and illustrated by tectonic maps. Proven compressional structures are horizontal stylolites, slickolite striae grooves, moderate fold structures and some few upthrows. Shear movements are documented by strike-slip faults (horizontal displacements up to 3.5 km) and pullapart structures, accompanied by slickolites, shear planes and Riedel shears. The kinematic signification of the particular phenomena is interpreted in context with paleo - stress fields and plate tectonics in Middle Europe. The structural data of the single deformations indicate varying strengths of strain and a rotating change of the re - spective stress field orientation. Caused by the efficacy of various stress fields a multiple kinematical activation of joints and fault planes took place. A structural evolution towards a complete inventory of fractures in the upper crust (permian and mesozoic series) is obvious. In contrast to the explanations of part III the deformation DII is attributed no longer to the lowest but into the upper Lower Cretaceous. Old and new subsiding areas with different shapes can be traced. They also influenced the motion patterns. The younger compressive deformations DIV to DVI, which came to pass since Upper Oligocene, were modified by the contemporaneous vertical uplift of the Rhenish Massif. Narrow border areas between active paleohighs and -lows are often seamed by pull-apart structures. In the studied area the youngest deformation DVI is characterized by a temporal variation. The former plio-pleistocene paleostress field and its particular motion pattern differ from the recent stress field, which is even more regionally differentiated.
    Description: Einführung in Teil IV 8. Zusammenfassende Ausdeutung 8.1. Generelle Vorbemerkungen 8.2. Mesozoische Deformationen 8.3. Känozoische Deformationen 8.3.1. Eozäne Deformationen 8.3.2. Oligozäne Deformationen 8.3.3. Miozäne Deformationen 8.3.4. Plio-Pleisto-Holozäne Deformationen 9. Ergänzende Aspekte 9.1. Regionale Verteilung und Bildungsweise der jeweiligen Deformationsspuren 9.2. Offene Fragen und Ausblick Schriften
    Description: research
    Keywords: ddc:551.8
    Language: German
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  • 54
    Publication Date: 2022-08-15
    Description: Ausgangspunkt der Untersuchung ist eine Erstbeschreibung der sandig-kiesigen, von Quarz dominierten fluviatilen Schichten im unteren Teil der oberpaläozänen bis eozänen Antweiler-Formation im südlichsten Teil der Niederrheinischen Bucht. Die Nichtquarzgerölle werden typisiert und hinsichtlich ihrer Zusammensetzung und Herkunft beschrieben, wobei die Gerölle aus den Dolinenkiesen der nordeifeler Kalkmulden in die Untersuchung einbezogen werden. Es ergibt sich, dass Geröllmaterial südlicher Herkunft – sei es nun aus der Eifeler Nord-Süd-Zone oder dem luxemburg-saarländischen Mesozoikum beziehungsweise noch weiter südlich aus dem Saar-Nahe-Senke und der Lothringen-Pfalz-Senke – nach Norden transportiert worden ist; dazu kommt auf dem hypothetischen westlichen Transportweg Material aus den Ardennen. Der vorgeschlagene fluviatile Süd-Nord-Transportweg der Quarzkiese ist, was den östlichen Ast der Transportwege angeht, ebenfalls hypothetisch. Lediglich der Eintritt der Gerölle in und ihr Austritt aus der Eifel ist dank karstbedingter oder tektonischer Sedimentfallen dokumentiert. Im Zwischengebiet ist die alte Landoberfläche, die so meeresspiegelnah gelegen war, dass sie paläo-eozänzeitlich marin überflutet werden konnte, durch nachfolgende Hebung und Abtragung, vor allem plio-pleistozänen Alters, zerstört worden.
    Description: Abstract: Initial point of this investigation is a first description of the sandy to pebbly quartz dominated fluviatile strata building the lower part of the Upper Palaeocene to Eocene Antweiler Formation in the southernmost part of the Niederrheinische Bucht. Several types of non-quartz pebbles are defined and described regarding their mineral composition and their provenance. Included are pebbles from sandy doline fillings in the Devonian Limestone Synclines of the northern Eifel Mountains. The result is that most of the non-quartz pebbles derive from southern sources in the Eifel North- South Zone, the Mesozoic of Luxembourg and the adjacent Saar or even further from the Saar-Nahe and the Lorraine-Palatinate Syncline. Additionally material of the Ardennes is transported on a hypothetical western fluviatile pathway. The eastern pathway is hypothetical as well. Merely the entrance to and the way out of the Eifel Mountains is documented by carstic and tectonic sediment traps. In the area in bet - ween the Tertiary land surface which was so near the sea level that it could be reached by paleogene marine transgressions and was eroded due to the plio-pleistocene rise of the Rhenish Massif.
    Description: research
    Keywords: ddc:551.354 ; ddc:554.3
    Language: German
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  • 55
    Publication Date: 2022-12-07
    Description: Gerade die Verwendung des Dachschiefers hat im Rheinischen Schiefergebirge und seinen Nachbarregionen eine sehr lange Tradition, wobei das Schieferdach dort immer wieder im zentrum des Interesses der Denkmalpflege steht. Es wird ein Überblick über die mitteleuropäischen Schiefervorkommen und ihre tektonostratigraphische zugehörigkeit gegeben. Die petrographische Analyse erlaubt neben den Aussagen zur Qualität auch eine Bestimmung der Herkunft des Schiefers. zusätzlich zu den genormten Methoden der DIN EN 12326 werden Methoden (Klangund Ritztest, relative Wasseraufnahme) angepasst, um sie bei Altdächern anwenden zu können. Dabei müssen neue Anfor derungen definiert werden. Ergebnisse von Verwitterungsstudien an 30 bis 90 Jahre alten Dachbeispielen werden vorgestellt.
    Description: Abstract: The use of roof slate has a very long tradition in the Rhineland region (Rheinisches Schiefergebirge) and its neighbouring areas. It is a key subject of interest in the preservation of historic monuments. In the following, a survey on Central European slate deposits and their tectono - stratigraphic distribution is given. Besides a quality evaluation, petrographical analysis also provides the possibility of determining the origin of the slate. In addition to the test methods of the EN 12326 some test methods and requirements were adjusted to for the use on historic slate roofs. This paper also presents results of weathering studies on 30- to 90-year-old slate roofs.
    Description: research
    Keywords: ddc:622.35 ; Dachschiefer ; Materialprüfung
    Language: German
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  • 56
    Publication Date: 2023-03-29
    Description: Herdflächenlösungen stellen Bruchflächen von Scherbrüchen geometrisch im Raum dar und werden aus den Polaritäten von Erdbebenwellen bestimmt. Einige der induzierten Mikroerdbeben im Bereich Landau und Insheim in der Südpfalz, die sich seit 2006 ereignen, wurden mit ausreichendem Signal-Rausch-Verhältnis an genügend vielen Messstationen beobachtet, um Herdflächenlösungen berechnen zu können. Diese Lösungen können unter Einbeziehung von Relativlokalisierungen und bekannten tektonischen Strukturen als bevorzugt nordnordwest-südsüdost (NNWSSo) streichende Scherbrüche interpretiert werden. Die Scherbrüche haben meist einen Abschiebungsmechanismus mit einer dextralen Blattverschiebungskomponente, deren Anteil variiert. Die untersuchten Erdbeben werden durch Fluidinjektion erklärt, welche die Scherfestigkeit präexistenter Strukturelemente der Rheingrabenbildung reduziert und diese alten Bruchflächen reaktiviert haben.
    Description: Abstract: In the region of Landau and Insheim, Central upper Rhine Graben, SW Germany, micro-earthquakes occur since spring 2006 due to fluid injection in the uppermost crust. These events provide important information on the structures and state of stress at depth. Here we determine fault plane solutions of the micro-earthquakes in order to understand the rupture mechanisms and stress relations at depths. Together with the relative locations of the hypocentres a prevailing NNW-SSE striking normal faulting regime is found which has a variable minor dextral strike-slip component. This result can be well explained with existing NNW-SSE striking faults which were formed during the opening of the upper Rhine Graben. These faults are reac - tivated by the fluid injection which most probably reduces the normal stress on the faults due to the fluid pressure at depth.
    Description: 1. Hintergrund 2. untersuchungsgebiet 3. Methode 4. Datenaufbereitung und Datenanalyse 5. Ergebnisse 6. Synthetische Modellierung 7. Interpretation Schriften
    Description: research
    Keywords: ddc:551.22 ; Erdbeben ; Pfalz ; Oberrheingraben
    Language: German
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  • 57
    Publication Date: 2022-11-30
    Description: Unter der Stadt Mendig in der Vordereifel (Rheinland-Pfalz) ist in einer Tiefe von lediglich etwa 15 bis 25 m ein ausgedehntes Hohlraumsystem vorhanden. Die Hohlräume entstanden vorwiegend im 19. Jahrhundert und in der ersten Hälfte des 20. Jahrhunderts durch die bergmännische Gewinnung von Basalt im Kammer- Pfeiler-Bau. Das Tragwerk wird aus stehen gelassenen Basaltpfeilern und der Firste gebildet. Für die Standsicherheit der Hohlräume sind verschiedene stabilitätserhaltende und stabilitätsmindernde Faktoren, wie beispielsweise Pfeiler, Firstsicherungen und natürliche Firststrukturen ausschlaggebend. Um die Standsicherheit der Hohlräume einheitlich, objektiv, vom Bearbeiter unabhängig und repräsentativ zu bewerten, wurde ein Matrixsystem mit verschiedenen Bewertungskriterien erstellt und in einer GIS-gestützten Gefahrenkarte dargestellt. Der vorliegende Artikel beschreibt die Vorgehensweise mit der Erstellung eines Rasters, Festlegen und Aufsummierung der Bewertungspunkte sowie Darstellung in einer Karte. Am Beispiel eines Ausschnittes der ingenieurgeologischen Karte werden eine manuell und eine über das Matrixsystem erstellte Gefahrenkarte verglichen.
    Description: Abstract: Under the city of Mendig (Rhineland-Palatinate) extensive underground mines remain from former mining activities of the 19th and 20th century. The cavities have a room-and-pillar structure in a shallow depth of about 15 – 25 m. There are a lot of different structural elements that have a positive or negative influence on the stabili - ty conditions of the mine. These are for example the pillars and the structure and condition of the roof sections. To evaluate the stability of the cave, an objective and independent matrix including the different structural elements was developed and the so calculated risk map was visualized in a GIS. In this article, the procedure and the development of the matrix and the consequential map are described. In addition a manually drawn map is compared with the matrix-based one.
    Description: research
    Keywords: ddc:622.26 ; Unterirdische Bauwerke ; Eifel ; Altbergbau ; Ingenieurgeologie ; GIS
    Language: German
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  • 58
    Publication Date: 2023-04-12
    Description: Die Typuslokalität des papillatum-Schills und der Kirchberg-Bank des rheinhessischen oligozäns wird lithologisch beschrieben und lithostratigrafisch interpretiert. Die Fossilführung wird anhand publizierter und neuer Beprobungen gelistet und biofaziell interpretiert. Demnach ist die Position und vertikale Abfolge der Albig- Bank, des papillatum-Schills und der Kirchberg-Bank eindeutig fixierbar. Der papillatum- Schill folgt maximal 24 m über der marinen Albig-Bank. Er entwickelte sich auf einem durch diverse brackisch-marine Mollusken besiedelten Schlammgrund, der episodisch bis periodisch durch Stürme aufgearbeitet wurde. Erstmals konnten hier Landsäuger nachgewiesen werden, die auf eine Einspülung von einem nahe gelegenen Festland hinweisen. In der Kirchberg-Bank wechseln limnische mit palustrinen Flachwasser-Verhältnissen, unterbrochen von einer dünnen brackisch-marinen Lage; das spiegelt sich in wechselnder Lithologie wider.
    Description: Abstract: The type locality of the papillatum shelly bed and the Kirchberg Bed (oligocene, Rheinhesse, Germany) is described lithologically and interpreted litho - stratigrafically. The fossil content is listed, using published and new done samplings. The biofacies is interpreted. The relative position and vertical succession of the Albig Bed, the papillatum shelly bed and the Kirchberg Bed is clear fixable: the papillatum shelly bed follows about 24 m above the fully marine Albig Bed. It is developed on a brackish-marine mud flat colonized by diverse molluscans. Episodically to periodically, it is reworked by storm activity. For the first time terrestrial mammals are documented in this bed, indicating sluicing from a nearby terrestrial realm. In the Kirchberg Bed, limnic to palustrine conditions are alternating, interrupted by a thin brackish to marine layer. That is reflected by alternating lithologies, too.
    Description: research
    Keywords: ddc:562 ; Mainzer Becken ; Oligozän ; Biostratigraphie ; Foraminiferen ; Ostrakoden ; Gastropoda ; Mollusken
    Language: German
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  • 59
    facet.materialart.
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    In:  Kaden, S., Dietrich, O., Theobald, S. (Hrsg.). Wassermanagement im Klimawandel – Möglichkeiten und Grenzen von Anpassungsmaßnahmen. Berlin: oekom in Erscheinen
    Publication Date: 2014
    Description: Teilergebnise des BMBF-Verbundforschungsprojektes INKA BB, des TP 22 „Nachhaltige Managementstrategien für glaziale Seen Brandenburgs im Klimawandel“. Ergebnisse aus Berechnungen mit dem NA-Modell EGMO-D für STAR2-Szenarion mit 0 und 2K Temperaturanstieg zur Wasserstandsentwicklung von Flachseen im Raum Brandenburg KATASTER-BESCHREIBUNG: Absenkung der Seewasserspiegel im Extremfall um mehrere Meter, am größten in den Seen im Südosten Berlins und nehmen zum Nordwesten ab, Zunahme der Absenkungen ist am stärksten für Seen, welche im Vergleich zum Zufluss ein großes Volumen besitzen KATASTER-DETAIL: Tmit für (ECAHM, A1B, STAR 0.0T, d.h. T1 0.0 ... kein weiterer Temperaturanstieg nach 2000 und STAR 2.0K, d.h. T2.0 ... weiterer Temperaturanstieg nach 2000 um ca. 2K bis 2060), bis zum Jahr 2018 Stationarität des Füllungsregimes, erst danach Absenkungen zu erwarten Tmit (0K und 2K), von 0,5 m im Jahr 2018 bis auf 4,2 m im Jahr 2053, diejenigen mit 10% Überschreitungswahrscheinlichkeit von 0,4 m bis auf 2,4 m
    Keywords: Nordostdeutschland ; Szenarien 2004-2053 ; Korrelationsmethode ; Niederschlag ; Temperatur ; Verdunstung ; Abfluss ; Grundwasser
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  • 60
    facet.materialart.
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    In:  Kaden, S., Dietrich, O., Theobald, S. (Hrsg.). Wassermanagement im Klimawandel – Möglichkeiten und Grenzen von Anpassungsmaßnahmen. München: oekom verlag, 2014, S. 121-140
    Publication Date: 2014
    Description: Ergebnisse von Simulationen der potenziellen zukünftigen natürlichen bzw. bewirtschafteten Abflüsse auf Basis der hydrologischen Modelle SWIM, EGMO, WaSiM-ETH und HBV-light bzw. des Langfristbewirtschaftungsmodells WBalMo für Klimaszenarien von STAR (weiterer Temperaturanstieg um 0 K, 2 K bzw. 3 K) sowie WettReg A1B und eines Szenarios zur Braunkohleförderung und -verstromung (Rückgang des Grundwasserabsenkungsgebiets und der Sümpfungswassereinleitung) KATASTER-BESCHREIBUNG: Rückgang der mittleren natürlichen und bewirtschafteten Abflüsse aufgrund steigender Temperaturen (und der potenziellen Evapotranspiration) sowie teilweise Rückgang der Niederschläge Bei den natürlichen Abflüssen sind die Effekte des Rückgangs des Grundwasserabsenkungsgebiets und der damit verbundenen Vergrößerung der abflusswirksamen Fläche geringer als die Auswirkungen der klimatischen Änderungen. Unsicherheiten der Ergebnisse sowohl aufgrund der Wahl des Klimaszenarios als auch des hydrologischen Modells KATASTER-DETAIL: Delte T (STAR 0K, : 2013-53 vs. 1961-1990) leichter Anstieg der natürlichen Abflüsse durch Rückgang des Grundwasserabsenkungsgebiets; jedoch Rückgang im Vergleich zur Referenzperiode um bis zu 20 % Delte T (STAR 2K, STAR 3K und WettReg A1B: Rückgang der natürlichen Abflüsse im Verlauf des Szenariozeitraums, dabei Rückgang der mittleren Abflüsse (MQ)m Vergleich zur Referenzperiode um bis zu 40 % (STAR 2K) bzw. 50 % (STAR 3K und WettReg A1B), dieser Effekt wird zum Teil durch Rückgang des Grundwasserabsenkungsgebiets gemildert. Bewirtschaftete Abflüsse STAR 0K: z.T. Anstieg bis 2030 STAR 2K, STAR 3K: deutlicher Rückgang ab 2030
    Keywords: Lausitz ; 2013-2053 ; Klima ; Niederschlag ; Temperatur ; Abfluss ; Grundwasser ; Modell
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  • 61
    Publication Date: 2014
    Description: Zusammenhang zwischen Hitzestress in Räumen mit deren Lage. Veranschaulicht durch Messungen von Temperatur, Luftfeuchte und berechnetem UTCI Universal Thermal Climate Index. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Berlin ; 2011-2012 ; Umweltmedizin ; Luftfeuchte ; Temperatur ; Witterungsextreme
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  • 62
    Publication Date: 2014
    Description: Ansatz zur Identifizierung hitzevulnerabler Stadtgebiete über räumlich-edidemiologische Analysen. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Berlin ; 2000-2009 ; Umweltmedizin ; Temperatur ; Witterungsextreme ; Luftverunreinigungen
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  • 63
    Publication Date: 2014-11-29
    Description: An embedded-boundary Cartesian-mesh flow solver is coupled with a three degree-offreedom structural model to perform static, aeroelastic analysis of complex aircraft geometries. The approach solves the complete system of aero-structural equations using a modular, loosely-coupled strategy which allows the lower-fidelity structural model to deform the highfidelity CFD model. The approach uses an open-source, 3-D discrete-geometry engine to deform a triangulated surface geometry according to the shape predicted by the structural model under the computed aerodynamic loads. The deformation scheme is capable of modeling large deflections and is applicable to the design of modern, very-flexible transport wings. The interface is modular so that aerodynamic or structural analysis methods can be easily swapped or enhanced. This extended abstract includes a brief description of the architecture, along with some preliminary validation of underlying assumptions and early results on a generic 3D transport model. The final paper will present more concrete cases and validation of the approach. Preliminary results demonstrate convergence of the complete aero-structural system and investigate the accuracy of the approximations used in the formulation of the structural model.
    Keywords: Aeronautics (General); Aircraft Design, Testing and Performance
    Type: ARC-E-DAA-TN10082 , 2014 AIAA SciTech Conference; 13-17 Jan. 2014; National Harbor, Maryland; United States
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  • 64
    facet.materialart.
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    In:  CASI
    Publication Date: 2015-02-10
    Description: The accomplishments and status of the Project ELaNa.
    Keywords: Launch Vehicles and Launch Operations; Spacecraft Design, Testing and Performance
    Type: KSC-E-DAA-TN16773 , CubeSat WorkShop at SmallSat; 2-7 Aug. 2014; Logan, UT; United States
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  • 65
    Publication Date: 2018-06-11
    Description: Flight software parameters enable space mission operators fine-tuned control over flight system configurations, enabling rapid and dynamic changes to ongoing science activities in a much more flexible manner than can be accomplished with (otherwise broadly used) configuration file based approaches. The Mars Science Laboratory (MSL), Curiosity, makes extensive use of parameters to support complex, daily activities via commanded changes to said parameters in memory. However, as the loss of Mars Global Surveyor (MGS) in 2006 demonstrated, flight system management by parameters brings with it risks, including the possibility of losing track of the flight system configuration and the threat of invalid command executions. To mitigate this risk a growing number of missions have funded efforts to implement parameter tracking parameter state software tools and services including MSL and the Soil Moisture Active Passive (SMAP) mission. This paper will discuss the engineering challenges and resulting software architecture of MSL's onboard parameter state tracking software and discuss the road forward to make parameter management tools suitable for use on multiple missions.
    Keywords: Computer Programming and Software; Ground Support Systems and Facilities (Space)
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  • 66
    facet.materialart.
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    In:  Other Sources
    Publication Date: 2018-06-11
    Description: The Cassini Spacecraft and its ground system have been operational for over 16 years. Modernization presents several challenges due to the personnel, processes, and tools already invested and embedded into the current ground system structure. Every mission's ground system has its own unique complexities and challenges, involving various organizational units. As any mission from its inception to its execution, schedules are always tight. This forces GDS engineers to implement a working ground system that is not necessarily fully optimized. Ground system challenges increase as technology evolves and cyber threats become more sophisticated. Cassini's main challenges were due to its ground system existing before many security requirements were levied on the multi-mission tools and networks. This caused a domino effect on Cassini GDS tools that relied on outdated technological features. In the aerospace industry reliable and established technology is preferred over innovative yet less proven technology. Loss of data for a spacecraft mission can be catastrophic; therefore, there is a reluctance to make changes and updates to the ground system. Nevertheless, all missions and associated teams face the need to modernize their processes and tools. Systems development methods from well-known system analysis and design principles can be applied to many missions' ground systems. Modernization should always be considered, but should be done in such a way that it does not affect flexibility nor interfere with established practices. Cassini has accomplished a secure and efficient ground data system through periodic updates. The obstacles faced while performing the modernization of the Cassini ground system will be outlined, as well as the advantages and challenges that were encountered.
    Keywords: Space Communications, Spacecraft Communications, Command and Tracking; Ground Support Systems and Facilities (Space)
    Format: text
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  • 67
    Publication Date: 2018-06-11
    Description: A wireless health monitoring system has been developed for determining the height of water condensation in the steam pipes and the data acquisition is done remotely using a wireless network system. The developed system is designed to operate in the harsh environment encountered at manholes and the pipe high temperature of over 200 C. The test method is an ultrasonic pulse-echo and the hardware includes a pulser, receiver and wireless modem for communication. Data acquisition and signal processing software were developed to determine the water height using adaptive signal processing and data communication that can be controlled while the hardware is installed in a manhole. A statistical decision-making tool is being developed based on the field test data to determine the height of in the condensed water under high noise conditions and other environmental factors.
    Keywords: Instrumentation and Photography
    Type: SPIE; Volume 9063
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  • 68
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    In:  Other Sources
    Publication Date: 2018-06-11
    Description: Each proposal for a NASA mission concept includes a Science Traceability Matrix (STM), intended to show that what is being proposed would contribute to satisfying one or more of the agency's top-level science goals. But the information traditionally provided cannot be used directly to quantitatively compare anticipated science return. We added numerical elements to NASA's STM and developed a software tool to process the data. We then applied this methodology to evaluate a group of competing concepts for a proposed mission to Saturn's moon, Titan.
    Keywords: Computer Programming and Software
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  • 69
    Publication Date: 2016-03-12
    Description: No abstract available
    Keywords: Space Sciences (General)
    Type: JSC-CN-31119 , SpaceOps 2014; 5-9 May 2014; Pasadena, CA; United States
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  • 70
    Publication Date: 2016-03-12
    Description: No abstract available
    Keywords: Ground Support Systems and Facilities (Space)
    Type: M14-3760 , Annual International Space Station Research and Development Conference ; 17-19 Jun. 2014; Chicago, IL; United States
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  • 71
    Publication Date: 2018-06-12
    Description: Video about Space Launch System (SLS) Adaptive Augmenting Control Flight Tests on an F/A-18 Jet
    Keywords: Launch Vehicles and Launch Operations
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  • 72
    Publication Date: 2018-06-06
    Description: As part of the Lares (LAser RElativity Satellite) mission, an all-Italian scientific mission launched with the Vega maiden flight in February 2012, a mechanical separation and retention subsystem (SSEP) has been developed to retain the LARES satellite during launch and release it in the final orbit. The design flow was based on the identification of the driving requirements and critical areas to guide the trade-off, design, analysis and test activities. In particular, the SSEP had to face very high environmental loads and to minimize the contact areas with the satellite that had a spherical shape. The test activity overview is provided.
    Keywords: Mechanical Engineering; Launch Vehicles and Launch Operations; Spacecraft Design, Testing and Performance
    Type: The 42nd Aerospace Mechanism Symposium; 259-272; NASA/CP-2014-217519
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  • 73
    Publication Date: 2018-06-06
    Description: Deployment mechanisms play a pivotal role in mission success. These mechanisms often incorporate bolt elements for which a preload within a specified range is essential for proper operation. A common practice is to torque these bolt elements to a specified value during installation. The resulting preload, however, can vary significantly with applied torque for a number of reasons. The goal of this effort was to investigate ultrasonic methods as an alternative for bolt preload verification in such deployment mechanisms. A family of non-explosive release mechanisms widely used by satellite manufacturers was chosen for the work. A willing contractor permitted measurements on a sampling of bolt elements for these release mechanisms that were installed by a technician following a standard practice. A variation of approximately 50% (+/- 25%) in the resultant preloads was observed. An alternative ultrasonic method to set the preloads was then developed and calibration data was accumulated. The method was demonstrated on bolt elements installed in a fixture instrumented with a calibrated load cell and designed to mimic production practice. The ultrasonic method yielded results within +/- 3% of the load cell reading. The contractor has since adopted the alternative method for its future production. Introduction
    Keywords: Quality Assurance and Reliability; Mechanical Engineering; Instrumentation and Photography
    Type: The 42nd Aerospace Mechanism Symposium; 245-258; NASA/CP-2014-217519
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  • 74
    Publication Date: 2018-06-06
    Description: NASA's participation in the multi-nation ExoMars 2018 Rover mission includes a critical astrobiology Mass Spectrometer Instrument on the Rover called the Mars Organic Molecule Analyzer (MOMA). The Aperture Valve is a critical electromechanical valve used by the Mass Spectrometer to facilitate the transfer of ions from Martian soil to the Mass Spectrometer for analysis. The MOMA Aperture Valve development program will be discussed in terms of the initial valve design and subsequent improvements that resulted from prototype testing. The initial Aperture Valve concept seemed promising, based on calculations and perceived merits. However, performance results of this design were disappointing, due to delamination of TiN and DLC coatings applied to the titanium base metals, causing debris from the coatings to seize the valve. While peer reviews and design trade studies are important forums to vet a concept design, results from testing should not be underestimated. Despite the lack of development progress to meet requirements, valuable information from weakness discovered in the initial Valve design was used to develop a second, more robust Aperture Valve. Based on a check-ball design, the ETU / flight valve design resulted in significantly less surface area to create the seal. Moreover, PVD coatings were eliminated in favor of hardened, non-magnetic corrosion resistant alloys. Test results were impressive, with the valve achieving five orders of magnitude better sealing leak rate over end of life requirements. Cycle life was equally impressive, achieving 280,000 cycles without failure.
    Keywords: Lunar and Planetary Science and Exploration; Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 211-216; NASA/CP-2014-217519
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  • 75
    Publication Date: 2018-06-06
    Description: Use of small and very small spacecraft is rapidly becoming more common. Methods to intentionally deorbit these spacecraft at the end of useful satellite life are required. A family of mass efficient Roll-Out De- Orbiting devices (RODEO"TM") was developed by Composite Technology Development, Inc. (CTD). RODEO"TM" consists of lightweight film attached to a simple, ultra-lightweight, roll-out composite boom structure. This system is rolled to stow within a lightweight launch canister, allowing easy integration to the small satellite bus. The device is released at the end of useful lifetime and the RODEO"TM" composite boom unrolls the drag sail in a matter of seconds. This dramatically increases the deployed surface area, resulting in the higher aerodynamic drag that significantly reduces the time until reentry. A RODEO"TM" flight demonstration was recently conducted as part of the Colorado Space Grant Consortium's (COSGC) RocketSat-8 program, a program to provide students hands-on experience in developing experiments for space flight. The experiment was ultimately a success and RODEO (trademark) is now ready for future CubeSat missions.
    Keywords: Mechanical Engineering; Space Transportation and Safety
    Type: The 42nd Aerospace Mechanism Symposium; 183-188; NASA/CP-2014-217519
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  • 76
    Publication Date: 2018-06-06
    Description: The development of the Bi-Axial Solar Array Drive Mechanism (BSADM) presented in this paper is a demonstration of SSTL's unique space manufacturing approach that enables performing rapid development cycles for cost-effective products that meet ever-challenging mission requirements: The BSADM is designed to orient a solar array wing towards the sun, using its first rotation axis to track the sun, and its second rotation axis to compensate for the satellite orbit and attitude changes needed for a successful payload operation. The tight development schedule, with manufacture of 7 Flight Models within 1.5 year after kick-off, is offset by the risk-reduction of using qualified key component-families from other proven SSTL mechanisms. This allowed focusing the BSADM design activities on the mechanism features that are unique to the BSADM, and having an Engineering Qualification Model (EQM) built 8 months after kick-off. The EQM is currently undergoing a full environmental qualification test campaign. This paper presents the BSADM design approach that enabled meeting such a challenging schedule, its design particularities, and the ongoing verification activities.
    Keywords: Spacecraft Instrumentation and Astrionics
    Type: The 42nd Aerospace Mechanism Symposium; 153-160; NASA/CP-2014-217519
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  • 77
    Publication Date: 2018-06-06
    Description: The Space Research Centre of the Polish Academy of Sciences (SRC PAS) together with Astronika company have developed an Orbital Deployer called DRAGON for ejection of the Polish scientific nanosatellite BRITE-PL Heweliusz (Fig. 1). The device has three unique mechanisms including an adopted and scaled lock and release mechanism from the ESA Rosetta mission MUPUS instrument. This paper discusses major design restrictions of the deployer, unique design features, and lessons learned from development through testing.
    Keywords: Mechanical Engineering; Spacecraft Design, Testing and Performance
    Type: The 42nd Aerospace Mechanism Symposium; 487-496; NASA/CP-2014-217519
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  • 78
    Publication Date: 2018-06-06
    Description: An invention of a new and novel space robotic manipulator is described. By using a combination of lightweight truss links, a novel hinge joint, tendon-articulation and passive tension stiffening, this new robotic manipulator architecture achieves compact packaging, high strength, stiffness and dexterity while being very lightweight compared to conventional manipulators. The manipulator is also very modular; easy to scale for different reach, load and stiffness requirements; enabling customization for a diverse set of applications. Novel features of the new manipulator concept are described as well as some of the approaches to implement these design features. Two diverse applications are presented to show the versatility of the concept. First generation prototype hardware was designed, manufactured and has been assembled into a working manipulator that is being used to refine and extend development efforts.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 405-420; NASA/CP-2014-217519
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  • 79
    Publication Date: 2018-06-06
    Description: There has been an unfortunate lack of standardization of the terms and components of stepper motor performance, requirements definition, application of torque margin and implementation of test methods. This paper will address these inconsistencies and discuss in detail the implications of performance parameters, affects of load inertia, control electronics, operational resonances and recommended test methods. Additionally, this paper will recommend parameters for defining and specifying stepper motor actuators. A useful description of terms as well as consolidated equations and recommended requirements is included.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 375-390; NASA/CP-2014-217519
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  • 80
    Publication Date: 2018-06-06
    Description: Magnetic gearboxes are contactless mechanisms for torque-speed conversion. They present no wear, no friction and no fatigue. They need no lubricant and can be customized for other mechanical properties as stiffness or damping. Additionally, they can protect structures and mechanisms against overloads, limitting the transmitted torque. In this work, spur, planetary and "magdrive" or "harmonic drive" configurations are compared considering their use in aerospace applications. The most recent test data are summarized to provide some useful help for the design engineer.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 365-374; NASA/CP-2014-217519
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  • 81
    Publication Date: 2018-06-06
    Description: Calibration and testing of the instruments on the Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST) is being performed by the use of a cryogenic, full-field, optical simulator that was constructed for this purpose. The Pupil Select Mechanism (PSM) assembly is one of several mechanisms and optical elements that compose the Optical Telescope Element SIMulator, or OSIM. The PSM allows for several optical elements to be inserted into the optical plane of OSIM, introducing a variety of aberrations, distortions, obscurations, and other calibration states into the pupil plane. The following discussion focuses on the details of the design evolution, analysis, build, and test of this mechanism along with the challenges associated with creating a sub arc-minute positioning mechanism operating in an extreme cryogenic environment. In addition, difficult challenges in the control system design will be discussed including the incorporation of closed-loop feedback control into a system that was designed to operate in an open-loop fashion.
    Keywords: Optics
    Type: The 42nd Aerospace Mechanism Symposium; 287-302; NASA/CP-2014-217519
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  • 82
    Publication Date: 2018-06-06
    Description: Traditional fairing systems are designed to fully encapsulate and protect their payload from the harsh ascent environment including acoustic vibrations, aerodynamic forces and heating. The Orion fairing separation system performs this function and more by also sharing approximately half of the vehicle structural load during ascent. This load-share condition through launch and during jettison allows for a substantial increase in mass to orbit. A series of component-level development tests were completed to evaluate and characterize each component within Orion's unique fairing separation system. Two full-scale separation tests were performed to verify system-level functionality and provide verification data. This paper summarizes the fairing spring, Pyramidal Separation Mechanism and forward seal system component-level development tests, system-level separation tests, and lessons learned.
    Keywords: Spacecraft Design, Testing and Performance; Launch Vehicles and Launch Operations; Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 273-286; NASA/CP-2014-217519
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  • 83
    Publication Date: 2018-06-06
    Description: A RANCOR drill was designed to fit a Mars Exploration Rover (MER) class vehicle. The low mass of 3 kg was achieved by using the same actuator for three functions: rotation, percussions, and core break-off. Initial testing of the drill exposed an unexpected behavior of an off-the-shelf sprag clutch used to couple and decouple rotary-percussive function from the core break off function. Failure of the sprag was due to the vibration induced during percussive drilling. The sprag clutch would back drive in conditions where it was expected to hold position. Although this did not affect the performance of the drill, it nevertheless reduced the quality of the cores produced. Ultimately, the sprag clutch was replaced with a custom ratchet system that allowed for some angular displacement without advancing in either direction. Replacing the sprag with the ratchet improved the collected core quality. Also, premature failure of a 300-series stainless steel percussion spring was observed. The 300-series percussion spring was ultimately replaced with a music wire spring based on performances of previously designed rotary-percussive drill systems.
    Keywords: Mechanical Engineering; Lunar and Planetary Science and Exploration
    Type: The 42nd Aerospace Mechanism Symposium; 217-230; NASA/CP-2014-217519
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  • 84
    Publication Date: 2018-06-06
    Description: The purpose of this work is to evaluate several deployment methods for an origami-inspired solar array at two size scales: 25-meter array and CubeSat array. The array enables rigid panel deployment and introduces new concepts for actuating CubeSat deployables. The design for the array was inspired by the origami flasher model (Lang, 1997; Shafer, 2001). Figure 1 shows the array prototyped from Garolite and Kapton film at the CubeSat scale. Prior work demonstrated that rigid panels like solar cells could successfully be folded into the final stowed configuration without requiring the panels to flex (Zirbel, Lang, Thomson, & al., 2013). The design of the array is novel and enables efficient use of space. The array can be wrapped around the central bus of the spacecraft in the case of the large array, or can accommodate storage of a small instrument payload in the case of the CubeSat array. The radial symmetry of this array around the spacecraft is ideally suited for spacecraft that need to spin. This work focuses on several actuation methods for a one-time deployment of the array. The array is launched in its stowed configuration and it will be deployed when it is in space. Concepts for both passive and active actuation were considered.
    Keywords: Energy Production and Conversion; Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 189-194; NASA/CP-2014-217519
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  • 85
    Publication Date: 2018-06-06
    Description: This paper describes 3D-printed titanium compliant mechanisms for aerospace applications. It is meant as a primer to help engineers design compliant, multi-axis, printed parts that exhibit high performance. Topics covered include brief introductions to both compliant mechanism design and 3D printing in titanium, material and geometry considerations for 3D printing, modeling techniques, and case studies of both successful and unsuccessful part geometries. Key findings include recommended flexure geometries, minimum thicknesses, and general design guidelines for compliant printed parts that may not be obvious to the first time designer.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 169-174; NASA/CP-2014-217519
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  • 86
    Publication Date: 2018-06-06
    Description: An earlier study showed that EHD films could be accurately measured in a running bearing and that the EHD film eventually runs-in to a steady state value [1]. In the present paper, we report on additional tests conducted on bearings with more lubricants, wider speeds, and higher temperatures. The new results consistently show that all lubricants tested, including MAC-based lubricants have EHD film levels that are lower than model predictions in some situations. In addition, the MAC lubricants studied have lower film thickness than traditional hydrocarbons. Figure 1 is taken from [1] and shows room temperature data of MAC oil and Corey 100 oil, illustrating the smaller EHD film results when using this MAC oil. Since higher temperatures produce lower films by changing the viscosity, the concern we have is that the EHD films may be too small to prevent ball/race metal contact and resulting wear at lower speeds. Best bearing practices would have the EHD film thickness be at least three (3) times the composite surface roughness. In this paper, we will present measured EHD thicknesses of lubricant films at speeds up to several thousand RPM for bearing bore sizes from as low as 6 mm (0.2 in) to as large as 35 mm (1.4 in) using MAC, Corey and KG-80. Ambient temperatures from room temperature to 52C (125F) are used. Testing was done with the base oils as well as formulated greases. Greases eventually ran in to the same EHD values as the base oil but took longer times to get there. The results clearly indicate that wear is very possible in all steel bearings when using MAC lubricants and that this condition worsens with higher temperatures and smaller bearing size.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 103-112; NASA/CP-2014-217519
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  • 87
    Publication Date: 2018-06-06
    Description: In the frame of ESA's Solar Orbiter scientific mission, Almatech has been selected to design, develop and test the Slit Change Mechanism of the SPICE (SPectral Imaging of the Coronal Environment) instrument. In order to guaranty optical cleanliness level while fulfilling stringent positioning accuracies and repeatability requirements for slit positioning in the optical path of the instrument, a linear guiding system based on a double flexible blade arrangement has been selected. The four different slits to be used for the SPICE instrument resulted in a total stroke of 16.5 mm in this linear slit changer arrangement. The combination of long stroke and high precision positioning requirements has been identified as the main design challenge to be validated through breadboard models testing. This paper presents the development of SPICE's Slit Change Mechanism (SCM) and the two-step validation tests successfully performed on breadboard models of its flexible blade support system. The validation test results have demonstrated the full adequacy of the flexible blade guiding system implemented in SPICE's Slit Change Mechanism in a stand-alone configuration. Further breadboard test results, studying the influence of the compliant connection to the SCM linear actuator on an enhanced flexible guiding system design have shown significant enhancements in the positioning accuracy and repeatability of the selected flexible guiding system. Preliminary evaluation of the linear actuator design, including a detailed tolerance analyses, has shown the suitability of this satellite roller screw based mechanism for the actuation of the tested flexible guiding system and compliant connection. The presented development and preliminary testing of the high-precision long-stroke Slit Change Mechanism for the SPICE Instrument are considered fully successful such that future tests considering the full Slit Change Mechanism can be performed, with the gained confidence, directly on a Qualification Model. The selected linear Slit Change Mechanism design concept, consisting of a flexible guiding system driven by a hermetically sealed linear drive mechanism, is considered validated for the specific application of the SPICE instrument, with great potential for other special applications where contamination and high precision positioning are dominant design drivers.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 31-44; NASA/CP-2014-217519
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  • 88
    Publication Date: 2018-06-06
    Description: This paper presents the prototype of a tubular boom antenna developed for the Polish BRITE-PL satellite by the Space Research Center of the Polish Academy of Sciences (CBK PAN). What is unique about our work is that we developed an original type of the tubular boom antenna deployment mechanism that can be used widely as a basic solution for compact electrical antennas, booms deploying sensitive instruments, ultra-light planetary manipulators etc. The invented electromagnetic driving unit provides a dual complementary action - it adds extra energy to the driving spring, making the system more reliable, and at the same time it moderates the deployment speed acting as a kind of damper. That distinguishing feature predetermines the mechanism to be applied wherever the dynamic nature of a spring drive introducing dangerous vibrations and inducing severe local stress in the structure needs to be mitigated. Moreover, the paper reveals a product unique in Europe - a miniature beryllium bronze tubular boom free of geometry and strain defects, which is essential for stiffness and fatigue resistance. Both the deployment mechanism and the technology of tubular boom manufacturing are protected by patent rights.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 511-522; NASA/CP-2014-217519
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  • 89
    Publication Date: 2018-06-06
    Description: Creare Incorporated and NASA Goddard Space Flight Center developed and space qualified two wide range pumps (WRPs) that were included in the Sample Analysis at Mars (SAM) instrument. This instrument was subsequently integrated into the Mars Science Laboratory (MSL) "Curiosity Rover," launched aboard an Atlas V rocket in 2011, and landed on August 6, 2012, in the Gale Crater on Mars. The pumps have now operated for more than 18 months in the Gale Crater and have been evacuating the key components of the SAM instrument: a quadrupole mass spectrometer, a tunable laser spectrometer, and six gas chromatograph columns. In this paper, we describe the main design challenges and the ways in which they were solved. This includes the custom design of a miniaturized, high-speed motor to drive the turbo drag pump rotor, analysis of rotor dynamics for super critical operation, and bearing/lubricant design/selection.
    Keywords: Ground Support Systems and Facilities (Space); Mechanical Engineering; Lunar and Planetary Science and Exploration
    Type: The 42nd Aerospace Mechanism Symposium; 463-470; NASA/CP-2014-217519
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  • 90
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2018-06-06
    Description: The Deployment Mechanism for the Total and Spectral Solar Irradiance Sensor (TSIS) is responsible for bringing the Thermal Pointing System (TPS) from its stowed, launch locked position to the on-orbit deployed, operational position. The Deployment Mechanism also provides structural support for the TSIS optical bench and two-axis gimbal. An engineering model of the Deployment Mechanism has been environmentally qualified and life tested. This paper will give an overview of the TSIS mission and then describe the development, design, and testing of the Deployment Mechanism.
    Keywords: Mechanical Engineering; Spacecraft Instrumentation and Astrionics; Solar Physics
    Type: The 42nd Aerospace Mechanism Symposium; 435-450; NASA/CP-2014-217519
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  • 91
    Publication Date: 2018-06-06
    Description: This paper focuses on the mechanisms incorporated into SSTL's static deployable arrays; namely the sprung-hinges and hold down and release mechanism (HDRM). Combined, the HDRM and hinges form the hold down release system (HDRS). The deployable static solar array HDRS has been successfully used on several missions, first launched upon the DMC-CFESAT spacecraft in 2007 for a U.S. customer (Figure 1), and later used on DMC-UK2 and EXACTVIEW-1 launched in 2009 and 2012, respectively. The simple, robust and low-cost solution HDRS has been evident in allowing missions to satisfy an ever increasing power demand, allowing the solar arrays to increase in size and have a preferable sun angle for increased cell efficiency. The system is now being employed on the first mission out of SSTL's U.S. office (SST-US) on the Orbital Test Bed platform. This paper shall cover details of the original design and development program, problems incurred on latter missions, and evolution of the HDRS for the present Orbital Test Bed mission. Both the original development and recent evolutions have taken place in rapid timescales, to satisfy the high-turnaround of SSTL missions.
    Keywords: Mechanical Engineering; Structural Mechanics
    Type: The 42nd Aerospace Mechanism Symposium; 421-434; NASA/CP-2014-217519
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  • 92
    Publication Date: 2018-06-06
    Description: NASA Goddard Space Flight Center (GSFC) successfully developed a g-negation support system for use on the solar arrays of the Global Precipitation Measurement (GPM) Satellite. This system provides full deployment capability at the subsystem and observatory levels. In addition, the system provides capability for deployed configuration first mode frequency verification testing. The system consists of air pads, a support structure, an air supply, and support tables. The g-negation support system was used to support all deployment activities for flight solar array deployment testing.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 335-348; NASA/CP-2014-217519
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  • 93
    Publication Date: 2018-06-06
    Description: The Global Microwave Imager (GMI) instrument must spin at a constant rate of 32 rpm continuously for the 3-year mission life. Therefore, GMI must be very precisely balanced about the spin axis and center of gravity (CG) to maintain stable scan pointing and to minimize disturbances imparted to the spacecraft and attitude control on-orbit. The GMI instrument is part of the core Global Precipitation Measurement (GPM) spacecraft and is used to make calibrated radiometric measurements at multiple microwave frequencies and polarizations. The GPM mission is an international effort managed by the National Aeronautics and Space Administration (NASA) to improve climate, weather, and hydro-meteorological predictions through more accurate and frequent precipitation measurements. Ball Aerospace and Technologies Corporation (BATC) was selected by NASA Goddard Space Flight Center to design, build, and test the GMI instrument. The GMI design has to meet a challenging set of spin balance requirements and had to be brought into simultaneous static and dynamic spin balance after the entire instrument was already assembled and before environmental tests began. The focus of this contribution is on the analytical and test activities undertaken to meet the challenging spin balance requirements of the GMI instrument. The novel process of measuring the residual static and dynamic imbalances with a very high level of accuracy and precision is presented together with the prediction of the optimal balance masses and their locations.
    Keywords: Spacecraft Design, Testing and Performance
    Type: The 42nd Aerospace Mechanism Symposium; 303-318; NASA/CP-2014-217519
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  • 94
    Publication Date: 2018-06-06
    Description: The effect of various lubricants and other compounds on fastener torque-tension relationships is evaluated. Testing was performed using a unique test apparatus developed by Posey at the NASA Goddard Space Flight Center. A description of the test methodology, including associated data collection and analysis will be presented. Test results for 300 series CRES and A286 heat resistant fasteners, torqued into various types of inserts will be presented. The primary objective of this testing was to obtain torque-tension data for use on NASA flight projects.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 231-244; NASA/CP-2014-217519
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  • 95
    Publication Date: 2018-06-06
    Description: The ROtary Percussive Coring Drill is a light weight, flight-like, five-actuator drilling system prototype designed to acquire core material from rock targets for the purposes of Mars Sample Return. In addition to producing rock cores for sample caching, the ROPEC drill can be integrated with a number of end effectors to perform functions such as rock surface abrasion, dust and debris removal, powder and regolith acquisition, and viewing of potential cores prior to caching. The ROPEC drill and its suite of end effectors have been demonstrated with a five degree of freedom Robotic Arm mounted to a mobility system with a prototype sample cache and bit storage station.
    Keywords: Mechanical Engineering; Lunar and Planetary Science and Exploration
    Type: The 42nd Aerospace Mechanism Symposium; 195-210; NASA/CP-2014-217519
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  • 96
    Publication Date: 2018-06-06
    Description: Magnetic geared actuators (MGA) are designed to perform highly reliable, robust and precise motion on satellite platforms or aerospace vehicles. The design allows MGA to be used for various tasks in space applications. In contrast to conventional geared drives, the contact and lubrication free force transmitting elements lead to a considerable lifetime and range extension of drive systems. This paper describes the fundamentals of magnetic wobbling gears (MWG) and the deduced inherent characteristics, and compares conventional and magnetic gearing.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 175-182; NASA/CP-2014-217519
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  • 97
    Publication Date: 2018-06-06
    Description: Twist Capsule Assemblies are power transfer devices commonly used in spacecraft mechanisms that require electrical signals to be passed across a rotating interface. Flexible printed circuits (flex tapes, see Figure 2) are used to carry the electrical signals in these devices. Determining the current rating for a given trace (conductor) size can be challenging. Because of the thermal conditions present in this environment the most appropriate approach is to assume that the only means by which heat is removed from the trace is thru the conductor itself, so that when the flex tape is long the temperature rise in the trace can be extreme. While this technique represents a worst-case thermal situation that yields conservative current ratings, this conservatism may lead to overly cautious designs when not all traces are used at their full rated capacity. A better understanding of how individual traces behave when they are not all in use is the goal of this research. In the testing done in support of this paper, a representative flex tape used for a flight Solar Array Drive Assembly (SADA) application was tested by energizing individual traces (conductors in the tape) in a vacuum chamber and the temperatures of the tape measured using both fine-gauge thermocouples and infrared thermographic imaging. We find that traditional derating schemes used for bundles of wires do not apply for the configuration tested. We also determine that single active traces located in the center of a flex tape operate at lower temperatures than those on the outside edges.
    Keywords: Instrumentation and Photography; Electronics and Electrical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 161-168; NASA/CP-2014-217519
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  • 98
    Publication Date: 2018-06-06
    Description: The performance and life of precision ball bearings are critically dependent on maintaining a quantity of oil at the ball/race interface that is sufficient to support a robust protective film. In space applications, where parched conditions are intentionally the norm, harsh operating conditions can displace the small reserves of oil, resulting in reduced film thickness and premature wear. In the past, these effects have proven difficult to model or to measure experimentally. This paper describes a study addressing this challenge, where bearing thermal conductance measurements are employed to infer changes in lubricant quantity at the critical rolling interfaces. In the first part of the paper, we explain how the lubricant's presence and its quantity impacts bearing thermal conductance measurements. For a stationary bearing, we show that conductance is directly related to the lubricant quantity in the ball/race contacts. Hence, aspects of bearing performance related to oil quantity can be understood and insights improved with thermal conductance data. For a moving bearing, a different mechanism of heat transfer dominates and is dependent on lubricant film thickness on the ball. In the second part of the report, we discuss lubricant quantity observations based on bearing thermal conductance measurements. Lubricant quantity, and thus bearing thermal conductance, depends on various initial and operating conditions and is impacted further by the run-in process. A significant effect of maximum run-in speed was also observed, with less oil remaining after obtaining higher speeds. Finally, we show that some of the lubricant that is displaced between the ball and race during run-in operation can be recovered during rest, and we measure the rate of recovery for one example.
    Keywords: Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 113-128; NASA/CP-2014-217519
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  • 99
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2018-06-06
    Description: Marshall Space Flight Center (MSFC) has developed a valve concept to replace traditional pyrotechnic-driven isolation valves. This paper will describe the valve design and development process. The valve design uses a stem/wedge to support a disk inside the valve. That disk hermetically seals the pressurized fluids. A release mechanism holds the stem/wedge and a large spring in place. When required to open, a solenoid is energized and pulls the release mechanism allowing the spring to pull the stem/wedge away from the disk. Now the disk is unsupported and the pressure ruptures the disk allowing flow to the outlet of the valve. This paper will provide details of this design, describe the development testing, and show the results from the valve level tests performed. Also, a trade study is presented to show the advantages of this design to a conventional pyrotechnic-based valve.
    Keywords: Spacecraft Design, Testing and Performance; Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 471-486; NASA/CP-2014-217519
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  • 100
    Publication Date: 2018-06-06
    Description: The design, development, and operation of long duration spaceflight hardware has become an evolutionary process in which meticulous attention to details and lessons learned from previous experiences play a critical role. Invaluable to this process is the ability to retrieve and examine spaceflight hardware that has experienced a premature failure. While these situations are rare and unfortunate, the failure investigation and recovery from the event serve a valuable purpose in advancing future space mechanism development. Such a scenario began on July 31, 2010 with the premature failure of an ammonia pump on the external active thermal control system of the International Space Station. The ground-based inspections of the returned pump and ensuing failure investigation revealed five potential bearing forces that were un-accounted for in the design phase and qualification testing of the pump. These forces could combine in a number of random orientations to overload the pump bearings leading to solid-surface contact, wear, and premature failure. The recovery plan identified one of these five forces as being related to the square of the operating speed of the pump and this fact was used to recover design life through a change in flight rules for the operation of the pump module. Through the course of the failure investigation, recovery, and follow-on assessment of pump wear life, design guidance has been developed to improve the life of future mechanically pumped thermal control systems for both human and robotic exploration missions.
    Keywords: Space Sciences (General); Spacecraft Design, Testing and Performance; Mechanical Engineering
    Type: The 42nd Aerospace Mechanism Symposium; 451-462; NASA/CP-2014-217519
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