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  • 1980-1984  (99,847)
  • 1965-1969  (54,143)
  • 1960-1964  (30,283)
  • 1930-1934
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  • 1
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0001(1192)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: VII, 154 S. + 7 pl.
    Series Statement: U.S. Geological Survey bulletin 1192
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/34
    In: CRREL Report, 82-34
    Description / Table of Contents: The ice discharge through an opening in an ice control structure was documented to be a function of the floe size, ice type, ice floe conditions and vessel direction. The model data for the average ice discharge per vessel transit scaled to prototype values compared favorably with data taken at the St. Marys River ice control structure (ICS). The model results of the force measurements were also consistent with data taken at the St. Marys ICS. The dynamic loading conditions were independent of vessel direction. The dynamic loading to the structure using 3 types of ice (plastic, natural and urea-doped) showed a considerable difference in their means and standard deviations. The urea-doped ice was evaluated for dynamic loading conditions, and reasonable peak values of 3 to 5 times the mean load at each measuring position were recorded, independent of vessel direction. It appears that synthetic random ice floes may be used in model studies where ice discharge through an opening in a structure needs to be documented. This study shows the synthetic random ice floe discharge to fall reasonably within the values obtained for natural ice discharge for both rafted and non-rafted ice fields above the ICS. However, the question of whether synthetic ice can be used for analyzing force distributions and dynamic force loading criteria cannot be fully answered at this time because the load distributions of the synthetic and natural floes appear to differ.
    Type of Medium: Series available for loan
    Pages: 68 Seiten , Illustrationen
    Series Statement: CRREL Report 82-34
    Language: English
    Note: CONTENTS Abstract Preface Introduction Scope of work Ice discharge from Lake Huron into St. Clair River Water velocity profiles at Port Huron Ice conditions Physical model Basis for selection Description Instrumentation Model ice control structure Open water calibration Open water tests Experimental procedures and techniques Ice cover calibration Ice control structure orientation Analysis of ice discharge due to ship transits Natural ice Synthetic ice Forces on the ice control structure Static measurements Dynamic force measurements Potential additional shear stresses Anticipated ice conditions with ICS Conclusions Literature cited Appendix A. Application of model results Appendix B. Suggested additional studies Appendix C. Derivation of ice discharge
    Location: AWI Archive
    Branch Library: AWI Library
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  • 3
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-82/9
    In: CRREL Report, 82-9
    Description / Table of Contents: This study deals with the distribution of forces along the converging boundaries of the Port Huron, Michigan, region where unconsolidated ice in Lake Huron is held against wind and water stresses. An experimental basin was built to induce uniform shear stress on the model ice cover by flowing water beneath the ice. The boundary segments, which held the ice cover in the region, were instrumented to measure force in the normal and tangential directions. The distribution of normal forces along the boundary was compared with as distribution derived by using a theoretical model. An ice control structure (ICS) was installed in the basin and experiments were conducted to measure the forces on the ICS and the ice release through the opening in the ICS during simulated ship passages. The experimental results are presented in a nondimensional form. In addition, the force per unit length on the ICS and the area of ice released through its opening were estimated for the expected wind conditions at the Port Huron site.
    Type of Medium: Series available for loan
    Pages: v, 27 Seiten , Illustrationen
    Series Statement: CRREL Report 82-9
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Introduction Theoretical models Case 1 Case 2 Case 3 Experimental program Experimental facility Scaling factors Experimental results Analysis of wind data for lower Lake Huron Summary and conclusions Release of ice through the opening of an ICS Ice forces on the ice control structure Ice forces on ice control structure from a large unconsolidated ice cover Literature cited Appendix A. Equation for the stress resultants and velocities of the ice cover Appendix B. Monthly summary of wind data at Port Huron
    Location: AWI Archive
    Branch Library: AWI Library
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  • 4
    Series available for loan
    Series available for loan
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Call number: SR 90.0001(1199-H)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: III, H-10 S. + 1 pl.
    Series Statement: U.S. Geological Survey bulletin 1199-H
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 5
    Monograph available for loan
    Monograph available for loan
    Hamburg : Selbstverlag
    Associated volumes
    Call number: PIK N 456-98-0228/2
    In: Entwicklung von Klimamodellen ; Forschungsbericht 104 02 612
    Type of Medium: Monograph available for loan
    Pages: 27 S.
    Series Statement: Entwicklung von Klimamodellen Forschungsbericht 104 02 612
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 6
    Monograph available for loan
    Monograph available for loan
    Hamburg : Selbstverlag
    Associated volumes
    Call number: PIK N 456-98-0228/1
    In: Entwicklung von Klimamodellen ; Forschungsbericht 104 02 612
    Type of Medium: Monograph available for loan
    Pages: 27 S.
    Series Statement: Entwicklung von Klimamodellen Forschungsbericht 104 02 612
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 7
    Call number: SR 90.0914(129)
    In: Mineral assessment report
    Type of Medium: Series available for loan
    Pages: IV, 78 S. + 1 Kt.-Beil.
    ISBN: 011884329X
    Series Statement: Mineral Assessment report / Natural Environment Research Council, Institute of Geological Sciences 129
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 8
    Call number: MOP Per 301(18) ; MOP 37597
    In: Division of Meteorological Physics technical paper
    Type of Medium: Monograph available for loan
    Pages: 19 S.
    Series Statement: Division of Meteorological Physics technical paper 18
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 9
    Call number: ZSP-164-27
    In: The Geology of the South Shetland Islands
    Description / Table of Contents: Decption Island is a caldera formed by the subsidence of a group of overlapping volcanoes along arcuate and radial faults. Three volcanic episodes occured after the formation of the caldera and the location of those post-caldera volcanoes is controlled by the fault pattern which limits the caldera. Although it is possible to establish the relative ages of the four volcanic episodes, there is little information as to their absolute ages. It is probable that the latest eruptions occurred in historic times. Petrographically the Deception Island suite is a local alkaline deviation from the normal andesite-rhyolite association of the South Shetland Islands. Its lavas are characterized by an unusually high soda content. The sequence of crystallization is analogous to that of melts of certain composition in the system MgO-FeO-SiO2 crystallizing under conditions of strong fractionation. The geochemistry of the Deception Island volcanic rocks is reviewed and four new chemical analyses are presented.
    Type of Medium: Series available for loan
    Pages: 43 S. : Ill., graph. Darst., Kt. + 2 Kt.-Beil.
    Series Statement: 27
    Branch Library: AWI Library
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  • 10
    Series available for loan
    Series available for loan
    Associated volumes
    Call number: ZSP-164-26
    In: The Geology of the South Shetland Islands
    Description / Table of Contents: King George Island is almost entirely composed of igneous rocks; four volcanic episodes and one intrusive phase are represented. The oldest volcanics, which are believed to be Upper Jurassic in age, form a calc-alkaline suite with an andesite-rhyolite association. Recent field investigations indicate there is no evidence for the extensive areas of sedimentary rocks previously recorded. The presence of regionally metamorphosed xenoliths in the Jurassic Volcanos indicates that they rest upon a Basement Complex. The early Tertiary Andean Intrusive Suite, which is petrographically similar to that of Graham Land, forms an axial core to the island. The majority of the Jurassic Volcanics have been metasomatized by these intrusions and the significance of the resultant secondary minerals is discussed. A linear pattern of Tertiary and Quaternary vulcanicity has been demonstrated and lavas of three distinct episodes are described. One of these volcanic groups is of unknown age, whilst the others are known to be Middle Miocene and Recent. The lavas include dominant pyroxene-andesites, basaltic andesites, olivine-basalts and rare trachyandesites. The petrogenesis of the volcanic site is discussed and crystal separation is suggested as the most important factor in their evolution. A geological map, compiled from all the available rock collections and field notes, shows the distribution of the volcanic and intrusive groups.
    Type of Medium: Series available for loan
    Pages: 28 S. : Ill., Kt.
    Series Statement: 26
    Branch Library: AWI Library
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