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  • Wissenschaftspark Albert Einstein  (8)
  • Berlin International  (2)
  • GB Petershagen
  • GB Grünheide
  • 1980-1984  (10)
Type of Medium
Language
Region
Year
  • 1
    UID:
    kobvindex_GFZ44679
    Format: V, F-20 S.
    Series Statement: U.S. Geological Survey professional paper 907-F
    Note: MAB0014.001: SR 90.0002(907-F) , MAB0036: s
    In: Professional paper
    Language: English
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  • 2
    UID:
    kobvindex_GFZ20190522144949
    Format: vi, 38 Seiten , Illustrationen , 1 Beilage
    Series Statement: CRREL Report 84-2
    Content: Investigations of the in situ complex dielectric constant of sea ice were made using time-domain spectroscopy. It was found that (1) for sea ice with a preferred horizontal crystal c-axis alignment, the anisotropy of polarizing properties of the ice increased with depth, (2) brine inclusion conductivity increased with decreasing temperature down to about -8 C, at which point the conductivity decreased with decreasing temperature, (3) the DC conductivity of sea ice increased with increasing brine volume, (4) the real part of the complex dielectric constant is strongly dependent upon brine volume but less dependent upon the brine inclusion orientation, (5) the imaginary part of the complex dielectric constant was strongly dependent upon brine inclusion orientation but much less dependent upon brine volume. Because the electromagnetic (EM) properties of sea ice are dependent upon the physical state of the ice, which is continually changing, it appears that only trends in the relationships between the EM properties of natural sea ice and its brine volume and brine inclusion microstructure can be established.
    Note: CONTENTS Abstract Preface Nomenclature Introduction Dielectric properties of sea ice Time-domain spectroscopy measurement Laboratory measurements Field measurements Analysis of ladder data Conductivity of brine and sea ice Complex dielectric constant of brine and sea ice Discussion and conclusions Literature cited
    In: CRREL Report, 84-2
    Language: English
    Keywords: Forschungsbericht
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  • 3
    UID:
    kobvindex_GFZ20190522154343
    Format: iv, 43 Seiten , Illustrationen
    Series Statement: CRREL Report 84-8
    Content: This report describes the equipment and procedures that were used for acquiring, preparing and testing samples of multi-year sea ice. Techniques and procedures are discussed for testing ice samples in compression and tension at constant strain rates and constant loads, as well as in a conventional triaxial cell. A detailed account is given of the application and measurement of forces and dispiacements on the ice test specimens under these different loading conditions.
    Note: CONTENTS Abstract Preface Introduction Test material and test specimens Test material Required dimensions for test specimens Acquisition and preparation of specimens Field core sampling Specimen preparation in the laboratory Application of forces and displacements to uniaxial specimens Compression Tension Squareness imperfections Loading devices Universal testing machine Gas actuator for constant load Weight-and-pulley system for constant tension Equipment for triaxial tests Measurement of force and displacement Force Displacement Readouts and recorders Literature cited Appendix A: Phenolic-resin end caps Appendix B: Compliant platens Appendix C: Theoretical factor for converting overall strain to gauge-length strain indumbbell specimens Appci dix D: Items developed but not used in Phase I Appendix E: Use of the Brazil test
    In: CRREL Report, 84-8
    Language: English
    Keywords: Forschungsbericht
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  • 4
    UID:
    kobvindex_GFZ24042019110000
    Format: 38 Seiten , Illustrationen
    Series Statement: CRREL Report 83-23
    Content: The problems associated with measuring stresses in ice are reviewed. Theory and laboratory test results are then presented for a stiff cylindrical sensor made of steel that is designed to measure ice stresses in a biaxial stress field. Loading tests on freshwater and saline ice blocks containing the biaxial ice stress sensor indicate that the sensor has a resolution of 20 kPa and an accuracy of better than 15% under a variety of uniaxial and biaxial loading conditions. Principal stress directions can also be determined within 5 degrees. The biaxial ice stress sensor is not significantly affected by variations in the ice elastic modulus, ice creep or differential thermal expansion between the ice and gauge. The sensor also has a low temperature sensitivity (5 kPa/deg C).
    Note: CONTENTS Abstract Preface Introduction Previous work Stress measurements Design considerations Stress sensors Biaxial ice stress sensor Biaxial stress sensor theory Gauge deformation Stresses associated with cylindrical sensors Determination of ice stresses Gauge calibration Evaluation of the biaxial ice stress sensor Temperature sensitivity Biaxial loading test equipment Biaxial loading test results Differential thermal expansion Long-term drift Discussion of test results Conclusions Literature cited
    In: CRREL Report, 83-23
    Language: English
    Keywords: Forschungsbericht
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  • 5
    UID:
    kobvindex_GFZ20190417095858
    Format: 13 Seiten , Illustrationen
    Series Statement: CRREL Report 82-30
    Content: Equations are developed that can be used to determine the amount of gas present in sea ice from measurements of the bulk ice density, salinity and temperature in the temperature range o f-2 to -30°C. Conversely these relationships can be used to give the density of sea ice as a function of its temperature and salinity, considering both the presence of gas and of solid salts in the ice. Equations are also given that allow the calculation of the gas and brine volumes in the ice at temperatures other than that at which the bulk density was determined.
    In: CRREL Report, 82-30
    Language: English
    Keywords: Forschungsbericht
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  • 6
    UID:
    kobvindex_GFZ20190417101919
    Format: 44 Seiten , Illustrationen
    Series Statement: CRREL Report 82-31
    Content: Information on sea ice conditions in the Bering Strait and the icefoot formation around Fairway Rock, located in the strait, is presented. Cross-sectional profiles of Fairway Rock and the relief of the icefoot are given along with theoretical analyses of the possible forces active during icefoot formation. It is shown that the ice cover most likely fails in flexure as opposed to crushing or buckling, as the former requires less force. Field observations reveal that the Fairway Rock icefoot is massive, with ridges up to 15 m high, a seaward face only 20 degrees from vertical, and interior ridge slopes averaging 33 degrees. The icefoot is believed to be grounded and its width ranges from less than 10 to over 100 m.
    Note: CONTENTS Abstract Preface Introduction Bering Strait Field reconnaissance Estimation of ice forces on Fairway Rock 1. Creep deformation 2. Crushing failure 3. Flexural failure 4. Forces required to form floating or grounded pressure ridges along therock or to pile ice on the beaches 5. Buckling failure Driving forces Angle of internal friction of sea ice Summary Literature cited Appendix A: April 1982 field observations at Fairway Rock
    In: CRREL Report, 82-31
    Language: English
    Keywords: Forschungsbericht
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  • 7
    UID:
    kobvindex_GFZ20190425155353
    Format: v, 107 Seiten , Illustrationen
    Series Statement: CRREL Report 84-9
    Content: This report presents the results of the first phase of a test program designed to obtain a comprehensive understanding of the mechanical properties of multi-year sea ice from the Alaskan Beaufort Sea. In Phase I, 222 constant-strain-rate uni-axial compression tests were performed on ice samples from ten multi-year pressure ridges to examine the magnitude and variation of ice strength within and between pressure ridges. A limited number of constant-strain-rate compression and tension tests, constant-load compression tests, and conventional triaxial tests were also performed on ice samples from a multi-year floe to provide preliminary data for developing ice yield criteria and constitutive laws for multi-year sea ice. Data are presented on the strength, failure strain, and modulus of multi-year sea ice under different loading conditions. The statistical variation of ice strength within and between pressure ridges is examined, as well as the effects of ice temperature, porosity, structure, strain rate and confining pressure on the mechanical properties of multi-year sea ice.
    Note: CONTENTS Abstract Preface Introduction Field Sampling Site selection and description Ice sampling procedures Shipping and storage of ice samples Testing Techniques Multi-year Pressure Ridge Tests Ice description Sampling scheme and test variables Uniaxial compressive strength Residual compressive strength Failure strains Initial tangent modulus Statistical Variations in Ice Strength Differences in strength above and below level ice Sources of the variation in strength Shape of the strength histograms Multi-year Floe Ice Tests Ice description Uniaxial compressive strength Constant-load compression tests Constant-strain-rate tension tests Triaxial tests Conclusions Literature Cited Appendix A: Structural profile of a multi-year pressure ridge core Appendix B: Ridge uniaxial compression test data Appendix C: Structural profile of the continuous multi-year floe core Appendix D: Multi-year floe test data
    In: CRREL Report, 84-9
    Language: English
    Keywords: Forschungsbericht
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  • 8
    UID:
    kobvindex_GFZ78204
    Format: XVII, 96 S.
    ISBN: 0933876491
    Series Statement: Meteorological monographs 17, 39
    Note: MAB0014.001: MOP Per 412(17, 39)
    In: Meteorological monographs
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  • 9
    Book
    Book
    Madras, Indien :Productivity & Quality,
    UID:
    kobvindex_INT0000617
    Format: 342 pages : , 22.5 cm.
    Edition: 3rd revised edition, special 30th anniversary edition, reprint.
    ISBN: 9788185984568 (pbk.) , 8185984565 (pbk.)
    Content: MACHINE-GENERATED SUMMARY NOTE: "Written in a fast-paced thriller style, The Goal, a gripping novel, is transforming management thinking throughout the world. It is a book to recommend to your friends in industry - even to your bosses - but not to your competitors. Alex Rogo is a harried plant manager working ever more desperately to try improve performance. His factory is rapidly heading for disaster. So is his marriage. He has ninety days to save his plant - or it will be closed by corporate HQ, with hundreds of job losses. It takes a chance meeting with a professor from student days - Jonah - to help him break out of conventional ways of thinking to see what needs to be done. The story of Alex's fight to save his plant is more than compulsive reading. It contains a serious message for all managers in industry and explains the ideas, which underline the Theory of Constraints (TOC), developed by Eli Goldratt." --
    Note: PREVIOUS EDITIONS NOTE: 1st edition © 1984, revised edition © 1986, 2nd revised edition © 1992, 3rd revised edition © 2004, special edition © 2013.
    Language: English
    Keywords: Didactic fiction
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  • 10
    Online Resource
    Online Resource
    Oxford : Taylor and Francis Group
    UID:
    kobvindex_INT72751
    Format: 1 online resource (156 pages)
    Edition: 1st ed.
    ISBN: 9781138890930 , 9781317487463
    Series Statement: Routledge Library Editions: Marxism Series
    Content: Of all the scholarly work on the countryside done in pre-1917 Russia and in the Soviet Union in the 1920s, that of L.N. Kritsman and those influenced by him - the so-called 'Agrarian Marxists' - is perhaps the least well known. However, that work was of extremely high quality and very original. Its significance is more than historical, since it has great relevance to the study of peasantries in contemporary poor countries - especially to the analysis of peasant differentiation. This volume, first published in 1984, has been prepared by two specialists who have been working on Kritsman and the Agrarian Marxists for several years, and will help dispel ignorance of this important body of writing. It consists of two substantial essays, and an abridged translation of one of Kritsman's most important works: Class Differentiation of the Soviet Countryside (first published in 1926 and never before translated into English)
    Note: Cover -- Half Title -- Title Page -- Copyright Page -- Original Title Page -- Original Copyright Page -- Table of Contents -- Editors' Note -- Glossary and Abbreviations -- Introduction -- I. Class Analysis of the Russian Peasantry: The Research of Kritsman and his School -- II. The Agrarian Marxist Research in its Political Context: State Policy and the Development of the Soviet Rural Class Structure in the 1920s -- III. Class Stratification of the Soviet Countryside (edited and translated by Gary Littlejohn) -- Bibliography
    Additional Edition: Print version Cox, Terry Kritsman and the Agrarian Marxists (RLE Marxism) Oxford : Taylor & Francis Group,c2015 ISBN 9781138890930
    Language: English
    Keywords: Electronic books
    URL: FULL  ((OIS Credentials Required))
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