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  • Englisch  (1.920)
  • Russisch  (121)
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  • 1975-1979  (2.054)
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  • 1
    Signatur: AWI G9-07-0041
    Materialart: Monographie ausleihbar
    Seiten: vi, 196 S. : Ill., graph. Darst.
    Originaltitel: Vliyanie ratitel'nogo pokrava na promerzanie i protaivanie grunto
    Sprache: Russisch
    Zweigbibliothek: AWI Bibliothek
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  • 2
    Monographie ausleihbar
    Monographie ausleihbar
    London [u.a.] : Acad. Press
    Signatur: G 7746 ; M 93.0213
    Materialart: Monographie ausleihbar
    Seiten: XIV, 720 S. : Ill., graph. Darst.
    Ausgabe: 2. ed.
    ISBN: 0127829601
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 3
    Monographie ausleihbar
    Monographie ausleihbar
    Tulsa, Oklah. : American Association of Petroleum Geologists
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    Signatur: 9/M 93.0209
    In: AAPG studies in geology
    Materialart: Monographie ausleihbar
    Seiten: VII, 196 S. : graph. Darst.
    ISBN: 0891810099
    Serie: AAPG Studies in geology 5
    Sprache: Englisch
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
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  • 4
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 11/MR 90.0989 ; M 93.0094/2
    In: Handbook of strata-bound and stratiform ore deposits ; part I
    Materialart: Monographie ausleihbar
    Seiten: XI, 363 S.
    ISBN: 0444414029
    Sprache: Englisch
    Standort: Lesesaal
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 5
    facet.materialart.
    Unbekannt
    Milton Keynes : The Open University Press
    Signatur: 93.0258
    Seiten: 80 S.
    Serie: The Open University. Science: A third level course. Earth schience topics and methods , S 333PC
    Sprache: Englisch
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  • 6
    Monographie ausleihbar
    Monographie ausleihbar
    Hannover : Bundesanstalt für Geowissenschaften und Rohstoffe
    Dazugehörige Bände
    Signatur: 9882/II ; M 93.0064/2
    In: The iron ore deposits of Europe and adjacent areas
    Materialart: Monographie ausleihbar
    Seiten: 386 S. : graph. Darst.
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 7
    Signatur: 12222 ; M 93.0039/1
    In: Proceedings of the Second International Kimberlite Conference
    Materialart: Monographie ausleihbar
    Seiten: 399 S. : graph. Darst.
    ISBN: 087590212X
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 8
    Signatur: G 7862 ; M 93.0149/11
    In: Physics and chemistry of the earth
    In: International series of monographs on earth sciences
    Materialart: Monographie ausleihbar
    Seiten: XI, 909 S. : graph. Darst.
    Ausgabe: 1. ed.
    Serie: Physics and chemistry of the earth 11
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
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  • 9
    Monographie ausleihbar
    Monographie ausleihbar
    Dazugehörige Bände
    Signatur: 11443 ; M 93.0232/2
    In: Metallization associated with acid magmatism
    Materialart: Monographie ausleihbar
    Seiten: 166 S. : graph. Darst.
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 10
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: 10/M 93.0251/3
    In: Handbook of geochemistry
    Materialart: Monographie ausleihbar
    Seiten: Losebl.-Ausg.
    Sprache: Englisch
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
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  • 11
    Signatur: G 7276 ; 4/M 93.0215
    In: NATO ASI series
    Materialart: Monographie ausleihbar
    Seiten: XII, 410 S. : graph. Darst.
    ISBN: 9027707944
    Serie: NATO ASI series : C, Mathematical and physical sciences 30
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
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  • 12
    Signatur: M 93.0154/5 ; 11/G 9206
    In: Developments in petrology
    Materialart: Monographie ausleihbar
    Seiten: XI, 272 S.
    ISBN: 0444416587
    Serie: Developments in petrology 5
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Lesesaal
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  • 13
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/26
    In: CRREL Report, 78-26
    Beschreibung / Inhaltsverzeichnis: Ice fog suppression experiments on the Fort Wainwright Power Plant cooling pond were conducted during the winters of 1974-76. Baseline information studies occupied a sizable portion of the available ice fog weather in 1974-75. Then hexadecanol was added to the pond and dramatically improved visibility by reducing fog generated from water vapor released by the pond at -14 C. Although this temperature was not low enough to create ice fog, the cold vapor fog created was equally as devastating to visibility in the vicinity of the pond. During the winter of 1975-76, suppression tests were continued using films of hexadecanol, mixes of hexadecanol and octadecanol, and ethylene glycol monobutyl ether (EGME). Suppression effectiveness at colder temperatures was stuided and limits to the techniques were probed. A reinforcing grid was constructed that prevented breakup of the film by wind and water currents. Lifetime tests indicated that EGME degrades much more slowly than either hexadecanol or the hexadecanol-octadecanol mix. The films were found to be very effective fog reducers at warmer temperatures but still allowed 20% to 40% of normal evaporation to occur. The vapor thus produced was sufficient to create some ice fog at lower temperatures, but this ice fog occurred less frequently and was more quickly dispersed than the thick fog that was present before application of the films.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 27 Seiten , Illustrationen
    Serie: CRREL Report 78-26
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Ice fog from cooling ponds Evaporation Relative humidity and cold air Ice fog suppression Air movement Plastic films Rafts Injection wells Cooling towers Chemical films Reinforced film experiments Meteorological data collection Floating reinforcement grid Application of the hexadecanol film Hexadecanol, octadecanol mixes Ethylene glycol monobutyl ether Laboratory tests of suppression effectiveness Conclusions Literature cited Appendix A. Design for an automatic thin chemical film applicationsystem Appendix B. Meteorological data
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  • 14
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/19
    In: CRREL Report, 78-19
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 21 Seiten , Illustrationen
    Serie: CRREL Report 78-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Previous work Methods and results Methods of analysis Salinity-chlorophyll a associations Discussion Comparison of ice and water column standing crops Estimated mass of ice associated chl. a Mechanism of ice algae formation in the Weddell Sea Differences between the biological environments of fast and drifting pack ice Conclusions Literature cited Appendix A. Species variations - ice and water column
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  • 15
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/6
    In: CRREL Report, 79-6
    Beschreibung / Inhaltsverzeichnis: Nondestructive repetitive plate bearing (RPB) tests were conducted on various test sections in state highways in Maine during 13-15 April 1976. The RPB test consists of making resilient surface deflection measurements during repetitive loadings at various radii from the load plate. The pavement system stiffness was calculated and the resilient modulus values for the various pavement layers were determined with the Chevron computer program for a layered elastic system. A thawed analysis using nondimensional deflection curves for the various sections provided a guide to the susceptibility of the pavement systems to surface failure and pothole development. Some comparisons between stabilized and nonstabilized aggregate and soil were made with calculated stiffness values. The moduli of the various materials were also compared. The residual surface deflections during testing for several pavement systems indicated a linear logarithmic relationship with number of load applications. A relationship between the modulus of the asphalt cement concrete pavement and pavement temperature was developed for the limited temperature range during the testing.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 20 Seiten , Illustrationen
    Serie: CRREL Report 79-6
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors Introduction Descriptions of road test sections Test equipment and procedures. Field repetitive plate bearing tests Data analysis General Layered-elastic analysis of the pavement systems Statistical analysis. Flexural analysis Summary and conclusions Literature cited Appendix A: Resilient surface deflections for the test points
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  • 16
    Signatur: ZSP-201-78/9
    In: CRREL Report, 78-9
    Beschreibung / Inhaltsverzeichnis: Large, simply supported beams of temperate lake ice were found, generally, to yield significantly higher flexural strengths than the same beams tested in the cantilever mode. Data support the view that a significant stress concentration may exist at the fixed corners of the cantilever beams. Maximum effects are experienced with beams of cold, brittle ice substantially free of structural imperfections; for this kind of ice the strength difference factor, here attributed to the effect of stress concentrations, may exceed 2.0; that is, simply supported beams test a factor of 2 or more stronger than the same beams tested in the cantilever mode. In ice that has undergone extensive thermal degradation, the stress concentration effect may be eliminated entirely. Simply supported beams generally yield higher strengths when the top surfaces are placed in tension. This behavior is attributed to differences in ice type; the fine-grained, crack-free top layer of snow-ice which constituted up to 50% of the ice cover in the current series of tests usually reacted more strongly in tension than the coarse-grained crack-prone bottom lake ice.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 14 Seiten , Illustrationen
    Serie: CRREL Report 78-9
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Test sites and ice cover properties Beam testing Results Discussion Conclusions Literature cited
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  • 17
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/6
    In: CRREL Report, 78-6
    Beschreibung / Inhaltsverzeichnis: A new freezing mechanism, called segregation freezing, is proposed to explain the generation of the suction force that draws pore water up to the freezing surface of a growing ice lens. The segregation freezing temperature is derived by applying thermodynamics to a soil mechanics concept that distinguishes the effective pressure from the neutral pressure. The frost-heaving pressure is formulated in the solution of the differential equations of the simultaneous flow of heat and water, of which the segregation freezing temperature is one of the boundary conditions.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 13 Seiten , Illustrationen
    Serie: CRREL Report 78-6
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Segregation freezing Analysis Heat conduction in the nascent ice layer Water flow in the unfrozen soil Heat transfer in the unfrozen soil Energy balance at the segregation-freezing front Numerical computation Literature cited Appendix A. Essence of Portnov’s method Appendix B. Frost-heaving without air available
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  • 18
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/8
    In: CRREL Report, 78-8
    Beschreibung / Inhaltsverzeichnis: The interaction of a 5.1-GHz transverse electric surface wave with a dielectric slab is experimentally investigated. The wave is initially supported by a dielectric substrate resting upon a metallic ground-plane. A slab, made of the same dielectric material as the substrate and variable in height, is then placed upon the waveguide. The results for a small slab sitting on the substrate showed that the discontinuity was a very inefficient launcher of reflected surface waves. Investigations of these reflections with a trough waveguide showed that, for values of slab height comparable to the exponential decay height of the surface wave, the reflections remain very small. However, as the slab height is increased beyond the decay height, the reflected amplitude approaches the theoretical value for a plane wave reflected from the interface between air and the same dielectric. The results are applicable to surface wave methods of microwave deicing of wings and helicopter rotors.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 16 Seiten , Illustrationen
    Serie: CRREL Report 78-8
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Background Objective and procedure Theory of plane surface waves Waveguide design and characteristics Physical apparatus Frequency characteristics Spatial distribution of Ey above the guide Guide wave length Surface wave interaction with a slab discontinuity Experiments with a trough Discussion and conclusions Literature cited
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  • 19
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/7
    In: CRREL Report, 78-7
    Beschreibung / Inhaltsverzeichnis: The theory of non-coaxial in-plane plastic deformation of soils that obey the Coulomb yield criterion is presented. The constitutive equations are derived by use of the geometry of the Mohr circle and the theory of characteristic lines. It is found that, for solving a boundary value problem, the non-coaxial angle must be given such values that enable us to accommodate the presupposed type of flow in the given domain satisfying the given boundary conditions. The non-coaxial angle is contained in the constitutive equations as a parameter. Therefore, the plastic material obeying the Coulomb yield criterion is a singular material whose constitutive equations are not constant with material but are variable with flow conditions.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 28 Seiten , Illustrationen
    Serie: CRREL Report 78-7
    Sprache: Englisch
    Anmerkung: CONTENTS Abstrac Preface Introduction Analysis of stress Geometry of the Mohr circle Stress characteristic directions Analysis of strain rate Constitutive equations Strain-rate characteristic directions Constitutive geometry Strain-rate tensor The dyadic expression Plastic work rate Coordinate transformation Example The stress solution Velocity equations in the a-characteristic curvilinear coordinates The constant speed solution Velocity equations in the constant density region Solution in the first constant-density subregion Solution in the second constant-density subregion Solution in the passive region Conclusion Literature cited
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  • 20
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/32
    In: CRREL Report, 77-32
    Beschreibung / Inhaltsverzeichnis: An experimental study of forced convective heat transfer over a vertical melting plate has been conducted. This study covers water velocities ranging from 1.7 to 9.8 mm/s and bulk water temperatures from 1.11 to 7.50 C. The experimental results are correlated in terms of Nusselt, Prandtl and Reynolds numbers with a moderate correlation coefficient of 0.843. The results are expected to be useful in predicting the heat transfer characteristics of a much larger prototype ice-water heat sink.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 12 Seiten , Illustrationen
    Serie: CRREL Report 77-32
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Summary Introduction Problem General review of the subject Experimental apparatus General considerations Water reservoir Test chamber assembly Pumping system Electrical control system Experimental procedure Experimental results Discussion and comparison of results Conclusions Literature cited
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  • 21
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/27
    In: CRREL Report, 78-27
    Beschreibung / Inhaltsverzeichnis: Uniaxial compression and tension tests were conducted on polycrystalline snow-ice to determine the effect of temperature on its strength. Test temperatures ranged from -O.1C to -54C. Two machine speeds, 0.847 mm/s and84.7 mm/s were used for the constant displacement rate tests. The compressive strength at -54C was about oneorder of magnitude higher than at -0.1C. The tensile strength at -18C was about 20% higher than at 0.1C. The initial tangent and 50% strength moduli are given for the compression tests, while the secant modulus to failure is given for the tension tests.The mode of fracture is discussed and the test results are compared with data from other investigations.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 22 Seiten , Illustrationen
    Serie: CRREL Report 78-27
    Sprache: Englisch
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  • 22
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/20
    In: CRREL Report, 78-20
    Beschreibung / Inhaltsverzeichnis: Abstract: Measurements of the concentrations of Aitken nuclei in maritime air were made near Barrow, Alaska, in June 1975 with a modified Nolan-Pollack small-particle detector. The concentrations varied from 50 to 300 particles cm^-3 depending upon meteorological conditions. The mean Aitken nuclei count was 100 particles cm^-3 for diameters greater than 2 x 10^-3 μm. Transmission electron micrographs of aerosols in maritime air near Barrow were taken. The size range was measured to be 0.01 to 2.5 μm in diameter with the most frequently observed diameter being 0.04 μm. The volume of the maritime air and the collection efficiency of aerosol particles on filmed grids for electron microscopy were measured. The aerosol concentrations were found to be 76 to 101 particles cm^-3 ; the mean concentration was calculated to be 87 particles cm^-3. The aerosol particles in the maritime air were identified by electron microscopy and selected area electron diffraction analysis. About 20% of the aerosol particles were identified, and 80% of the particles were too small for electron diffraction analysis. Sea salt particles constituted 2% of the total, and clay minerals 3%; these particles were considered to be of natural origin. Solid combustion by-products such as coagulated carbon particles and fly ash particles constituted 16%. Despite the comparative remoteness of the sampling site, the measurements indicate that many anthropogenic aerosols were found using an electron microscope.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 48 Seiten , Illustrationen
    Serie: CRREL Report 78-20
    Sprache: Englisch
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  • 23
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/5
    In: CRREL Report, 78-5
    Beschreibung / Inhaltsverzeichnis: The viscoelastic deflection of an infinite floating ice plate subjected to a circular load was solved, assuming the Maxwell-Voigt type four-element model. An effective method of numerical integration of the solution integrals was developed, of which each integrand contains a product of Bessel functions extending to infinity. The theoretical curve was fitted to the field data, but the material constants thus found varied with time and location.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 32 Seiten , Illustrationen
    Serie: CRREL Report 78-5
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction The problem The solution Method of numerical integration Ramp/steady loading Curve fitting to time lapse deflections Asymptotic deflection Deflection profiles Acknowledgement Literature cited Appendix I. Analytical background Appendix II. Computer programs, ramp time profiles and steady time profiles
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  • 24
    Signatur: ZSP-201-78/4
    In: CRREL Report, 78-4
    Beschreibung / Inhaltsverzeichnis: The use of radio-echo sounding records to indicate the presence of internal layers within large ice sheets is of interest to glaciologists because it offers a means of tracking the internal properties of the ice sheets over large distances. The interpretation of the reflections obtained in this manner is more valuable, however, if a physical property change relating to the glaciological regime can be related to the dielectric property change producing the radio-echo reflections. In this report, we use the measured physical properties of core to bedrock taken at Cape Folger, East Antarctica (66 deg 22 min s, 111 deg (E), 324-m depth), to compute a profile of dielectric properties and from this, a depth-reflection coefficient profile for comparison with observed radio-echo reflections. The measurements available on physical properties are: density variations, bubble size and shape changes, and crystal fabric variations. The depths of the strong reflections shown on the available radio-echo records are in reasonable agreement with the depths corresponding to the highest reflection coefficients computed from the combined physical property measurements. In calculations to differentiate the separate effects of different physical properties, it appears that density variations account for the primary contributions to the calculated dielectric property changes corresponding to the highest reflection coefficients. However, bubble changes alone can also account for reasonable, though lower, reflection coefficients at the appropriate depths. Crystal fabric variations correspond poorly with the reflection locations. Density variations are normally associated with depositional events in the history of the ice sheet.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 12 Seiten , Illustrationen
    Serie: CRREL Report 78-4
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Derivation of the power reflection coefficient-depth variation Possible sources of dielectric constant variation with depth in ice sheets Ice density variations Effect of macroscopic impurity layers Effect of microscopic impurtty layers Changes in inclusion geometry Effect of crystal orientation changes Physical properties of the Cape Folger core Density-depth profile Air bubble-geometry depth profile Crystal orientation-depth profile Radio-echo sounding data Results and conclusions Literature cited
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  • 25
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/2
    In: CRREL Report, 78-2
    Beschreibung / Inhaltsverzeichnis: Many of the technical questions relating to iceberg transport are given brief, but quantitative, consideration. These include iceberg genesis and properties, the mechanical stability of icebergs at sea, towing forces and tug characteristics, drag coefficients, ablation rates, and handling and processing the iceberg at both the pick-up site and at the final destination. In particular the paper attempts to make technical information on glaciological and ice engineering aspects of the problem more readily available to the interested planner or engineer. Specific conclusions include: (1) No unprotected iceberg, no matter how long or wide, would be likely to survive the ablation caused by a long trip to low latitudes. (2) Icebergs that have a horizontal dimension exceeding 2 km may well be prone to breakup by long wavelength swells. (3) To avoid the dangers associated with an iceberg capsizing, the width of a 200-m thick iceberg should always be more than 300 m. (4) For towing efficiency the length/width ratio of a towed iceberg should be appreciably greater than unity. (5) For a pilot project, the selected iceberg would have to be quite small, if for no other reason than the practical availability of tug power.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 31 Seiten , Illustrationen
    Serie: CRREL Report 78-2
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Sources and properties of tabular icebergs Sources Characteristics of ice shelves near the ice front Characteristics of tabular icebergs Towing Geophysical and engineering considerations Tug characteristics Handling and processing Cutting and boring with thermal devices Penetration with electrothermal devices Electrothermal cutting Making vertical cuts by pre-split blasting Primary fragmentation by blasting Primary fragmentation by mechanical sawing Comminuting ice with machines Slurry pipelines Conclusion Literature cited
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  • 26
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/11
    In: CRREL Report, 77-11
    Beschreibung / Inhaltsverzeichnis: Two performance indicators, effectiveness and thermal efficiency, are defined and used to evaluate the year-round performance of three protected membrane roofs in Alaska and New Hampshire. Effectiveness is a measure of the deviations of ceiling temperatures from a yearly average, with large diviations indicating erratic performance in the roofing-insulation system and small departures indicating a thermally stable system. Thermal efficiency, the ratio of calculated heat loss to measured heat loss, is affected by climatic conditions such as rain, snow, solar radiation and wind. Thermal efficiency values of 100% or greater are possible since the calculated heat loss is based only on the inside and outside air temperature differences and the thermal properties of the roof components. Results of the year-round evaluation indicate that the three protected membrane roofs generally have high values of both effectiveness and thermal efficiency.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 40 Seiten , Illustrationen
    Serie: CRREL Report 77-11
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S.customary to metric (SI) units of measurement Introduction Location of test sites Fairbanks Anchorage Hanover, N.H. Test program Instrumentation Effectiveness Therma lefficiency Heat balance within the roof Comparisons with conventional systems Conclusions Effectiveness of the test roof Thermal efficiency Heat balance within the roof Applicability Recommendations Literature cited Appendix A. Temperature and heat flow measurements, Anchorage and Fairbanks, Alaska, and Hanover, New Hampshire Appendix B. Thermal efficiencies of the test roof, Anchorage and Fairbanks, Alaska, and Hanover, New Hampshire Appendix C. January 1973 and August 1972 comparisons of protected membrane and conventional built-up membrane systems at Hanover, New Hampshire
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  • 27
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/12
    In: CRREL Report, 77-12
    Beschreibung / Inhaltsverzeichnis: A computer program to calculate the increased live load on a snow-covered roof due to rain-on-snow is given. For the 25-year rainstorm falling on a heavy snow load on a flat roof in Hanover, New Hamsphire, and additional 98 kg/m2 (20 lb/ft2) of liquid water is added to the live load. The additional load due to rain-on-snow is very sensitive to the snow properties and characteristics of the roof. A wide range of live loads is possible, depending on the particular circumstances.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vii, 19 Seiten , Illustrationen
    Serie: CRREL Report 77-12
    Sprache: Englisch
    Anmerkung: CONTENTS Page Abstract Preface Summary Nomenclature Introduction Water movement through snow Vertical percolation Lateral flow Flat roofs Sloping roofs Rainfall intensity-duration effects Miscellaneous effects Radial flow to drains Flow along gutters on snow-covered roofs Snow structure Basal layer Conclusion Literature citied Appendix A. Computer program calculating roof loads from rain-on-snow
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  • 28
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/10
    In: CRREL Report, 77-10
    Beschreibung / Inhaltsverzeichnis: Abstract: The amount of force that an ice sheet can apply to a vertical pile was tested by lowering a hydraulic ram device into a hole cut in an existing ice sheet. The device had a large base and shoved a relatively narrow vertical pile in a horizontal direction. Test variables were: pile widths - 1.5 in. to 36.7 in.; pile shapes - flat, round, 45 ° and 90° wedges; ice thickness - 2.6 in. to 8.8 in.; and ram speed - 0.07 in./sec to 18.75 in./sec; but not all shapes and sizes were tested at all speeds. Air temperature was 20 ° F (-6.7 ° C). Forces and displacements were measured electronically. The findings are presented as a table of test results and as bar graphs of the resultant ice pressures versus the pile width-to-ice-thickness ratio, pile width and shape combination and pile velocity. The types of failures in the ice sheet were classified as crushing, splitting, buckling, bending, and creeping. The ice sheet generally withstood a high initial load followed by several lower peak load levels. The maximum ice pressure measured was 610 psi for a 12.6-in.-diam round pile in 8.4-in.-thick ice.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 9 Seiten , Illustrationen
    Serie: CRREL Report 77-10
    Sprache: Englisch
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  • 29
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/3
    In: CRREL Report, 78-3
    Beschreibung / Inhaltsverzeichnis: The mathematical theory for the bearing capacity of river ice for vehicles is presented. The floating ice sheet is assumed to have simple supports at the shore line. Solutions are presented for loads uniformly distributed over circular and rectangular areas. Numerical evaluations are made for a number of vehicles and the results presented in graphical form
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 22 Seiten , Illustrationen
    Serie: CRREL Report 78-3
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric (SI) units of measurement Introduction Theory Solution by superposition Solution by Fourier integral Solution by Fourier series Application and results Literature cited Appendix A: Bearing capacity of river ice for military vehicles Appendix B: Vehicle specifications Appendix C: Fortran II computer program
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  • 30
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/29
    In: CRREL Report, 77-29
    Beschreibung / Inhaltsverzeichnis: Results of measurements of salinity, grain size, substructure dimensions and crystal fabrics of the undeformed 2.15-m-thick annual sea ice sheet near Narwhal Island, Alaska, are presented. A notable observation was the formation of a dominant c-axis horizontal structure in all ice below 14 cm, including transformation to a pronounced east-west alignment of the c-axes by a depth of 66 cm. This study confirms earlier reports of the occurrence of very strong horizontal c-axis alignments in arctic fast ice.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 8 Seiten , Illustrationen
    Serie: CRREL Report 77-29
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Sampling and analytical procedures Results Discussion Conclusions Literature cited
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  • 31
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/27
    In: CRREL Report, 77-27
    Beschreibung / Inhaltsverzeichnis: The spectral reflectance of natural snow in the range of 0.20- to about 0.40-micrometers wavelengths was studied in the laboratory using both continuous spectral scanning and fixed bandpass measurements. White barium sulfate pressed powder was used as a standard for comparison. The reflectance of fresh snow was found to be very high (usually nearly 100%) and only weakly wavelength dependent from 0.24 micrometers to the visible range. In the 0.20- to 0.24-micrometers portion of the spectrum, the reflectance was found to be quite erratic. Possible reasons for the irregularities in reflectance measurements are discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 19 Seiten , Illustrationen
    Serie: CRREL Report 77-27
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Experimental procedure Snow collection Spectrophotometric methods Data analysis Potential sources of error Presentation of results Continuous-scan measurements Comparison of sequential bandpass and continuous-scan measurements Theoretical calculations Discussion of results Differences in amplitude of reflectance measurements Irregularities in the shape of spectral reflectance curves The true spectral reflectance of snow in the ultraviolet region Conclusions Literature cited Appendix A. Absolute reflectance values of pressed BaSO4 powder
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  • 32
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/26
    In: CRREL Report, 77-26
    Beschreibung / Inhaltsverzeichnis: A theory for ice forces acting on inclined wedges has been developed, thus making it possible to predict the magnitude of the intermittent ice forces from knowledge of the physical parameters of the system. The theory has been verified by model tests with artificial and natural ice.
    Materialart: Schriftenreihen ausleihbar
    Seiten: viii, 26 Seiten , Illustrationen
    Serie: CRREL Report 77-26
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface List of symbols Summary Introduction Recent ice research in Denmark General Structures with vertical faces Wedges with inclined faces Recording of the strength of natural ice Artificial ice — properties and manufacture General Composition of material Order of mixing ingredients Rupture theory Theoretical approach Initial contact Forces acting on wedge Maximum force and actual force Principal stress equations 8Dynamic equations Intermittent nature of force Theoretical curve Verifiction of theory by model tests Description Width of rupture channel Plotting of results Engineering application Comparison with Korahavin’s results Recommendations for future research References Appendix A
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  • 33
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/25
    In: CRREL Report, 77-25
    Beschreibung / Inhaltsverzeichnis: Results of a study to determine the feasibility of using an impulse radar to detect moisture variations in the built-up roof at CRREL and to monitor the curing of concrete are presented. The results indicate that impulse radar can be used to detect wide variations in roof moisture associated with built-up roof surface deterioration and that this technique has the potential of providing a nondestructive test method for measuring the strength of concrete during curing.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 9 Seiten , Illustrationen
    Serie: CRREL Report 77-25
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric units of measurement Introduction Impulse radar system Results and discussion Conclusions and recommendations Literature cited ILLUSTRATIONS Figure Relative locations where impulse radar measurements were made andsamples for moisture determinations were obtained on the CRREL roof Impulse radar signal reflected from metal sheet resting on roof Impulse radar signal reflection from roof at station A Impulse radar surface reflection coefficient versus moisture contentofroof Impulse radar signal reflection from aluminum foil on bottom of con-crete form and from aluminum sheet metal resting on top of form Unconfined compressive strength of concrete versus time Examples of X-Y plots of impulse radar signals obtained during thesounding of concrete slab Impulse radar signal reflection coefficients versus time for acuring concrete slab Calculated impulse radar signal attenuation in concrete slab versuselapsed time Dielectric constants versus time calculated from impulse radar signalInformation obtained during curing of concrete slab Unconfined compressive strength of concrete versus corrected reflec-tion coefficient calculated from impulse radar signal data obtainedduring the curing of concrete slab TABLES Comparison of roof moisture content with radar surface reflection coefficient and dielectric constant
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  • 34
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/17
    In: CRREL Report, 76-17
    In: Mechanics of cutting and boring, (DE-B103)20210225152525
    Beschreibung / Inhaltsverzeichnis: This report, which is one of a series on the mechanics of cutting and boring in rock, deals with the kinematics of machines which utilize a continuous belt as the cutting unit (e.g. coal saws, shale saws, digger-chain trenchers). The discussion and analysis cover the geometry and motion of various components of the cutting system, including such topics as chipping depth, production and conveyance of cuttings, tool trajectories, tool speeds, tool angles, and arrangement of cutting tools on the belt. Worked examples are included to illustrate the application of various equations to practical problems
    Materialart: Schriftenreihen ausleihbar
    Seiten: viii, 24 Seiten , Illustrationen
    Serie: CRREL Report 76-17
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Summary Foreword Introduction Terminology Chipping depth Production and conveyance of cuttings Tool trajectories Tool speeds Tool relief angles — kinematic considerations Tool rake angles Belt curvature, slackness and flexibility Tool layout Longitudinal tool spacing Transverse tool spacing Cross-section profiles of the kerf Literature cited
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  • 35
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/20
    In: CRREL Report, 76-20
    Beschreibung / Inhaltsverzeichnis: Under ordinary conditions the freezing of water begins with supercooling and ice nucleation, and proceeds at 0°C at the ice/water interface until ice formation stops. The presence of solutes, high pressure, or dispersal in fine pores causes the water to freeze at temperatures below 0°C (the so-called freezing point depression). Whenever freezing begins, it pro­ceeds at a constant temperature, or at a temperature which becomes progressively lower. A temperature rise during ice formation is considered here to be an anomaly. Under all equal circumstances, the conditions under which an anomal­ous freezing temperature is observable appear to be very special. This report describes two different experiments dis­playing the anomalous rise of temperature after nucleation and during ice formation. In one case the water was dispersed in the fine pores of fine powders; in the other case pure water was frozen in a transparent insulated cell. Photographic observations were made; relations of ice surface to water volume were measured.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 23 Seiten , Illustrationen
    Serie: CRREL Report 76-20
    Sprache: Englisch
    Anmerkung: CONTENTS Page Abstract Preface Conversion factors for U.S.customary and SI units Introduction Materials, instruments, measurements Experiments with water freezing in fine pores Freezing experiments with bulk water Summary and conclusions Literature cited
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  • 36
    Signatur: ZSP-201-76/18
    In: CRREL Report, 76-18
    Beschreibung / Inhaltsverzeichnis: Three surface elevation and ice thickness profiles obtained during the 1972 Arctic Ice Dynamics Joint Experiment on a multiyear ice floe were analyzed to obtain relationships between surface elevation, thickness and physical properties of the ice. It was found that for ice freeboards from 0.10 m to 1.05 m above sea level a linear relationship between ice density and freeboard could be postulated. The equation for the regression line is: Ice density = -194f' + 974 kg/cu m where f' is the ice freeboard plus snow depth in ice equivalent at the point in question. This statistical relationship is consistent with observed physical properties, which indicate that as the ice freeboard increases, ice salinity decreases and the higher freeboard or thicker ice therefore decreases in density. Using this variable density with freeboard relationship, a model was constructed to predict ice thickness, given ice freeboard and snow depth alone. This prediction is desirable, since snow depth and freeboard are relatively easy to obtain, whereas ice thickness can usually be obtained only by drilling through the ice. The model was compared with two other models. It was found that the variable density prediction model gave the best approximation to observed ice thickness, with a standard error between the measured and predicted value of about 0.4 m, compared with errors from 50 to 100% higher for the other two models.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 25 Seiten , Illustrationen
    Serie: CRREL Report 76-18
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Summary Introduction Previous work Results Models for predicting thickness from ice freeboard Comparison between measured and predicted thicknesses Spectral behavior of measured and predicted profiles Comparisons of ice thickness using airborne laser profilometry Conclusions Literature cited Appendix A: Misgivings on isostatic imbalance as a mechanism for sea ice cracking
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  • 37
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/9
    In: CRREL Report, 76-9
    Beschreibung / Inhaltsverzeichnis: Access to study areas may be an important factor in long-term field-oriented research, particularly in-regions without well-developed road and communications systems. In a wildland hydrometeorology research project in subarctic Alaska, access to and within a 40-square-mile research watershed has been developed both in accordance with a general plan prepared at project inception and in response to developing research requirements. Foot trails, trails for 'off-road' low-ground-pressure tracked vehicles, helicopter transport, long-term data recorders, and radio telemetry of data have all been incorporated in an access and communications system. Cost estimates indicate that incorporation of gravel roads into the system would be economically advantageous, given adequate funding for initial road construction.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 9 Seiten , Illustrationen
    Serie: CRREL Report 76-9
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Conversion factors for U.S. customary and SI units Introduction Access within the Caribou-Poker Creeks Research Watershed Trail access Helicopter access Road access Alternative approaches Long-term recorders Telemetry systems Remote sensing Relative costs A desirable system Selected bibliography
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  • 38
    Monographie ausleihbar
    Monographie ausleihbar
    København : Nyt Nordisk Forl.
    Dazugehörige Bände
    Signatur: ZSP-553-204,1
    In: Meddelelser om Grønland
    Materialart: Monographie ausleihbar
    Seiten: 22 S. + Beil
    ISBN: 8717023785
    Serie: Meddelelser om Grønland 204,1
    Sprache: Englisch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
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  • 39
    Signatur: ZSP-553-197,4
    In: Meddelelser om Grønland
    Materialart: Monographie ausleihbar
    Seiten: 25 S.
    ISBN: 8717022185
    Serie: Meddelelser om Grønland 197,4
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 40
    Monographie ausleihbar
    Monographie ausleihbar
    København : Nyt Nordisk Forl.
    Dazugehörige Bände
    Signatur: ZSP-553-198,2
    In: Meddelelser om Grønland
    Materialart: Monographie ausleihbar
    Seiten: 266 S.
    ISBN: 8717021200
    Serie: Meddelelser om Grønland 198,2
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 41
    Signatur: ZSP-558
    In: Middle atmosphere program
    Materialart: Monographie ausleihbar
    Seiten: 97 S.
    Serie: Middle atmosphere program
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 42
    Monographie ausleihbar
    Monographie ausleihbar
    Leningrad : Izdatel'stvo Leningradskogo Universiteta
    Signatur: MOP 41076 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 292 Seiten , Illustrationen
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 43
    Monographie ausleihbar
    Monographie ausleihbar
    Dazugehörige Bände
    Signatur: 11/M 93.0253/2
    In: Rock-forming minerals
    Materialart: Monographie ausleihbar
    Seiten: 668 S.
    Ausgabe: 2nd ed.
    ISBN: 0582465222
    Klassifikation:
    Mineralogie
    Sprache: Englisch
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
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  • 44
    Monographie ausleihbar
    Monographie ausleihbar
    Moskva : Izdatel'stvo Moskovskogo Universiteta
    Signatur: AWI G3-07-0039
    Materialart: Monographie ausleihbar
    Seiten: 464 Seiten , Illustrationen
    Ausgabe: Izdanie vtoroe, pererabotannoe i dopolnennoe
    Sprache: Russisch
    Anmerkung: In kyrillischer Schrift
    Standort: AWI Lesesaal
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  • 45
    Monographie ausleihbar
    Monographie ausleihbar
    New York [u.a.] : Springer
    Signatur: PIK N 630-92-0608
    Materialart: Monographie ausleihbar
    Seiten: XIV, 237 S.: Ill., Kt.
    Ausgabe: 3. print.
    ISBN: 0387900462 , 3-540-90046-2
    Serie: Heidelberg science library 15
    Originaltitel: Vegetationszonen und Klima
    Sprache: Englisch
    Standort: A 18 - Bitte bestellen
    Zweigbibliothek: PIK Bibliothek
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  • 46
    Monographie ausleihbar
    Monographie ausleihbar
    New York [u.a.]: Wiley
    Signatur: M 93.0155
    Materialart: Monographie ausleihbar
    Seiten: VIII, 481 S.
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 47
    Monographie ausleihbar
    Monographie ausleihbar
    San Francisco : Freeman
    Signatur: M 93.0163
    Materialart: Monographie ausleihbar
    Seiten: X, 530 S. : Ill., graph. Darst.
    Ausgabe: 3. ed.
    ISBN: 071670272X
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 48
    Monographie ausleihbar
    Monographie ausleihbar
    New York [u.a.] : Springer
    Signatur: G 7858 ; M 93.0153
    Materialart: Monographie ausleihbar
    Seiten: XIII, 295 S.
    ISBN: 0387903690
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 49
    Signatur: M 93.0205
    Materialart: Monographie ausleihbar
    Seiten: 468 S.
    Ausgabe: 2. ed.
    ISBN: 0912890037
    Sprache: Englisch
    Standort: Kompaktmagazin oben
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  • 50
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 9/M 93.0003
    In: Developments in economic geology
    Materialart: Monographie ausleihbar
    Seiten: XI, 543 S.
    ISBN: 0444418059
    Serie: Developments in economic geology 11
    Sprache: Englisch
    Standort: Lesesaal
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  • 51
    Monographie ausleihbar
    Monographie ausleihbar
    Sussex : Artemis Pr.
    Signatur: M 93.0254
    Materialart: Monographie ausleihbar
    Seiten: 383 S.
    Ausgabe: 2nd ed., repr.
    ISBN: 0851413080
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 52
    Signatur: M 93.0224
    In: U.S. Geological Survey bulletin
    Materialart: Monographie ausleihbar
    Seiten: 456 S.
    Ausgabe: repr. with corr.
    Serie: Bulletin / U.S. Geological Survey 1452
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 53
    Signatur: M 93.0242
    In: (DE-B103)41191, Special publications / the Geological Society, London
    Beschreibung / Inhaltsverzeichnis: Subsurface aspects of the ore-forming process can be described in terms of standard chemical transport parameters such as T-P gradients, mineral solubilities, solvent chemistry and volume, diffusion parameters and energy flow. These necessary factors are rather easily assessed by geochemical, isotopic and structural studies. If deposition is in the surface environment, a complex array of factors will determine the success of the natural concentration process and the chances of preservation of a deposit. Basically, most large-scale ore-forming processes involve large fluid volumes and energy sources. Many environments where these requirements are met, the modern ocean ridge and the subduction environment, are still not well understood. The need for remote-sensing techniques in the submarine environment is stressed.
    Materialart: Monographie ausleihbar
    Seiten: VI, 188 Seiten , Illustrationen
    ISBN: 0900488336
    Serie: Special publications / the Geological Society, London 7
    Sprache: Englisch
    Anmerkung: Articles Introductory remarks on the transport problem W. S. Fyfe https://doi.org/10.1144/GSL.SP.1977.007.01.01 Model of hydrothermal ore genesis J. W. Elder https://doi.org/10.1144/GSL.SP.1977.007.01.02 Identification of ore-deposition environment from trace-element geochemistry of associated igneous host rocks J. A. Pearce and G. H. Gale https://doi.org/10.1144/GSL.SP.1977.007.01.03 Identification of the origin of oreforming solutions by the use of stable isotopes S. M. F. Sheppard https://doi.org/10.1144/GSL.SP.1977.007.01.04 Hydrogen and oxygen isotope evidence for sea-water-hydrothermal alteration and ore deposition, Troodos complex, Cyprus T. H. E. Heaton and S. M. F. Sheppard https://doi.org/10.1144/GSL.SP.1977.007.01.05 Hydrodynamic model for the origin of the ophiolitic cupriferous pyrite ore deposits of Cyprus E. T. C. Spooner https://doi.org/10.1144/GSL.SP.1977.007.01.06 Origin and emplacement of ophiolites I. G. Gass https://doi.org/10.1144/GSL.SP.1977.007.01.07 Hydrothermal alteration of the basaltic lavas of the Troodos Ophiolite Complex associated with the formation of the massive sulphide deposits G. Constantinou https://doi.org/10.1144/GSL.SP.1977.007.01.08 Rare-earth element evidence for the genesis of the metalliferous sediments of Troodos, Cyprus A. H. F. Robertson and A. J. Fleet https://doi.org/10.1144/GSL.SP.1977.007.01.09 Modern submarine hydrothermal mineralization: examples from Santorini and the Red Sea D. S. Cronan, P. A. Smith, and R. D. Bignell https://doi.org/10.1144/GSL.SP.1977.007.01.10 Mineralization at destructive plate boundaries: a brief review M. S. Garson and A. H. G. Mitchell https://doi.org/10.1144/GSL.SP.1977.007.01.11 Porphyry copper deposits J. P. Hunt https://doi.org/10.1144/GSL.SP.1977.007.01.12 Metallic mineralization affiliated to subaerial volcanism: a review R. H. Sillitoe https://doi.org/10.1144/GSL.SP.1977.007.01.13 Igneous geology and the evolution of hydrothermal systems in some sub-volcanic tin deposits of Bolivia J. N. Grant, C. Halls, W. Avila, and G. Avila https://doi.org/10.1144/GSL.SP.1977.007.01.14 Occurrence, origin and significance of mechanically transported sulphide ores at Buchans, Newfoundland J. G. Thurlow https://doi.org/10.1144/GSL.SP.1977.007.01.15 Geological setting of the Skorovas orebody within the allochthonous volcanic stratigraphy of the Gjersvik Nappe, central Norway C. Halls, A. Reinsbakken, I. Ferriday, A. Haugen, and A. Rankin https://doi.org/10.1144/GSL.SP.1977.007.01.16 The Planes-San Antonio pyritic deposit of Rio Tinto, Spain: its nature, environment and genesis D. Williams, R. L. Stanton, and F. Rambaud https://doi.org/10.1144/GSL.SP.1977.007.01.17 Kuroko deposits: their geology, geochemistry and origin Takeo Sato https://doi.org/10.1144/GSL.SP.1977.007.01.18 Stable isotope studies on Bougainville and in Matupi Harbour, New Britain, Papua New Guinea J. H. Ford, D. C. Green, J. R. Hulston, I. H. Crick, and S. M. F. Sheppard https://doi.org/10.1144/GSL.SP.1977.007.01.19 Volcanogenic mineralization at Avoca, Co. Wicklow, Ireland, and its regional implications J. W. Platt https://doi.org/10.1144/GSL.SP.1977.007.01.20 Discussion https://doi.org/10.1144/GSL.SP.1977.007.01.21
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  • 54
    Monographie ausleihbar
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    Amsterdam [u.a.] : Elsevier
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    Signatur: 11/M 93.0094/7
    In: Handbook of strata-bound and stratiform ore deposits ; part II
    Materialart: Monographie ausleihbar
    Seiten: xii, 656 S.
    ISBN: 044441407X
    Sprache: Englisch
    Standort: Lesesaal
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  • 55
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    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 11/MR 90.0988 ; M 93.0094/1
    In: Handbook of strata-bound and stratiform ore deposits ; part I
    Materialart: Monographie ausleihbar
    Seiten: X, 338 S.
    ISBN: 0444414010
    Sprache: Englisch
    Standort: Lesesaal
    Standort: Kompaktmagazin oben
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  • 56
    Monographie ausleihbar
    Monographie ausleihbar
    Hannover : Bundesanstalt für Geowissenschaften und Rohstoffe
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    Signatur: 9882/I ; M 93.0064/1
    In: The iron ore deposits of Europe and adjacent areas
    Materialart: Monographie ausleihbar
    Seiten: 418 S. : graph. Darst.
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
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  • 57
    Signatur: PIK N 456-99-0151 ; MOP 44361/3 / Mitte
    In: Proceedings of the joint symposium on atmospheric ozone, Volume 3
    Materialart: Monographie ausleihbar
    Seiten: 386 Seiten
    Serie: Proceedings of the joint symposium on atmospheric ozone 3
    Sprache: Englisch
    Standort: A 18 - Bitte bestellen
    Standort: MOP - Bitte bestellen
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  • 58
    Signatur: PIK N 456-99-0149 ; MOP 44361/1 / Mitte
    In: Proceedings of the joint symposium on atmospheric ozone, Volume 1
    Materialart: Monographie ausleihbar
    Seiten: 386 Seiten , Illustrationen
    Serie: Proceedings of the joint symposium on atmospheric ozone 1
    Sprache: Englisch
    Standort: A 18 - Bitte bestellen
    Standort: MOP - Bitte bestellen
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  • 59
    Signatur: PIK N 456-99-0150 ; MOP 44361/2 / Mitte
    In: Proceedings of the joint symposium on atmospheric ozone, Volume 2
    Materialart: Monographie ausleihbar
    Seiten: 386 Seiten
    Serie: Proceedings of the joint symposium on atmospheric ozone 2
    Sprache: Englisch
    Standort: A 18 - Bitte bestellen
    Standort: MOP - Bitte bestellen
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  • 60
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: 10/M 93.0251A/2
    In: Handbook of geochemistry
    Materialart: Monographie ausleihbar
    Seiten: Losebl.-Ausg.
    Sprache: Englisch
    Standort: Lesesaal
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  • 61
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: 10/M 93.0251/4
    In: Handbook of geochemistry
    Materialart: Monographie ausleihbar
    Seiten: Losebl.-Ausg.
    Sprache: Englisch
    Standort: Lesesaal
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  • 62
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: 10/M 93.0251/5
    In: Handbook of geochemistry
    Materialart: Monographie ausleihbar
    Seiten: Losebl.-Ausg.
    Sprache: Englisch
    Standort: Lesesaal
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  • 63
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/8
    In: CRREL Report, 79-8
    Beschreibung / Inhaltsverzeichnis: Sea ice ridging statistics obtained from a series of laser surface roughnessprofiles are examined. Each set of profiles consists of six 200-km-long flight tracks oriented approximately perpendicular to the coastline of the Chukchi and Beaufort Seas. The landward ends of the profiles were located at Point Lay, Wainwright, Barrow, Lonely, Cross Island and Barter Island. The flights were made in February, April, August, and December 1976, and one additional profile was obtained north of Cross Island during March 1978. It was found that although there is a systematic variation in mean ridge height (h) with season (with the highest values occurring in late winter), there is no systematic spatial variation in h at a given time. The number of ridges/km (micron) is also high during the late winter, with the highest values occurring in the Barter and Cross Island profiles . In most profiles, the ice 20 to 60 km from the coast is more highly deformed (higher micron values) than the ice either nearer the coast or farther seaward. The Wadhams model for the distribution of ridge heights gives better agreement with observed values in the higher ridge categories than does the Hibler model. Estimates of the spatial recurrence frequency of large pressure ridges are made by using the Wadhams model and also by using an extreme value approach. In the latter, the distribution of the lagest ridges per 20 km of laser track was found to be essentially normal
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 28 Seiten , Illustrationen
    Serie: CRREL Report 79-8
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Data collection and processing Analysis General Variations in ridging Ridge height distributions Occurrence of high ridges The tail of the distribution Extreme values Applications to offshore design Conclusions Literature cited Appendix A. Tabulated ice ridge data
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  • 64
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/3
    In: CRREL Report, 79-3
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 7 Seiten , Illustrationen
    Serie: CRREL Report 79-3
    Sprache: Englisch
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  • 65
    Signatur: ZSP-201-78/28
    In: CRREL Report, 78-28
    Materialart: Schriftenreihen ausleihbar
    Seiten: x, 112 Seiten , Illustrationen
    Serie: CRREL Report 78-28
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors Introduction Descriptions of road test sections Test equipment and procedures Field repetitive plate bearing tests Data analysis General Layered-elastic analysis of the pavement systems Statistical analysis Flexural analysis Summary and conclusions Literature cited Appendix A: Resilient surface deflections for the test points
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  • 66
    Signatur: ZSP-201-78/23
    In: CRREL Report, 78-23
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 53 Seiten , Illustrationen
    Serie: CRREL Report 78-23
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Conversion factors: Metric (SI) to U.S. customary units of measurement Introduction Selection of experimental approach Previous investigations of effect of freeze-thaw on soil deform ability Selection of laboratory test method Selection of method of field validation tests Field repeated-load plate-bearing tests Test pavements, soils and materials Test procedures and results Resilient modulus of subgrade calculated from field tests Mathematical model Characterization of asphalt concrete Characterization of frozen silt Calculated resilient modulus of silt within the zone of freezing Laboratory repeated-load triaxial tests Specimens, equipment and testing procedures Apparatus Procedures Resilient properties calculated from laboratory tests Calculation methods Asphalt concrete - test results Asphalt concrete - statistical analysis and discussion Silt - test results Silt - statistical analysis Discussion and conclusions Literature cited Appendix A. Repeated-load plate-bearing test results Appendix B. Laboratory repeated-load triaxial test results Appendix C. Regression equation coefficients for resilient modulus and Poisson’s ratio from repeated-load triaxial test data on asphalt concrete and silt Appendix D. Detailed procedures for repeated-load triaxial testing
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  • 67
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/21
    In: CRREL Report, 78-21
    Beschreibung / Inhaltsverzeichnis: This study investigates the possibility of providing estimates of the time of occurrence and length of the freezing season for any location in East and West Germany by using the average Januavy air temperature (AJ AT) as an index. The results indicate that reliable values of the mean freezing index can be obtained from the AJAT relationships which are developed for Germany. This association is further verified using data from the northeastern part of the U.S., and the AJ AT is then used to determine the average starting and ending dates (and hence the probable length) of the freezing season for stations in Germany. The AJ AT and the average dates of snowfall occurrence for numerous locations in the U.S. and Germany are also correlated. Interrelationships between these parameters and the average number of days with snow on the ground for stations up to 3000 m in elevation in Germany are examined. A detailed AJ AT map for East and West Germany, in which data from 134 stations, latitude, altitude and regional influences are considered, is developed in order to make the relationships usable. A historical review of the literature on snow studies in Germany and a brief discussion of snow-cover interpretation by satellite photography are included
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 48 Seiten , Illustrationen , 1 Karte
    Serie: CRREL Report 78-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Historical literature review Relationships between midwinter temperature and freezing season Mean freezing index 4 Average January air temperature U.S. comparative study Correlation of AJAT and duration of freezing season Relationships between average January air temperature and snow conditions U.S. relationships German relationships Mapping of average January air temperatures Analysis of observed AJ AT data Development of detailed maps Application and discussion Examples Influence of vegetation Literature cited Appendix A. interpretation of snow cover by satellite Appendix B. Contour, station elevation and Aj AT maps for East and West Germany
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  • 68
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/16
    In: CRREL Report, 78-16
    Beschreibung / Inhaltsverzeichnis: A model investigation of drifting snow conditions was conducted in a hydraulic flume using a sand-water analog. Model results were evaluated to define modeling parameters that would allow quantitative correlation between measured prototype drift conditions and the model. The modeled structure was the standard plan snow fence designed by the Wyoming Highway Department and installed along Interstate Highway 80 in 1971. The performance of this system was documented by the Rocky Mountain Forest and Range Experiment Station of the U.S. Forest Service. Models of the fence were constructed for three heights and two geometric scales. Geometric scaling was based on terrain roughness and boundary layer thickness considerations, while velocity scaling was based on particle fall velocity and threshold of motion characteristics. Simulation of the atmospheric boundary layer was found to be of primary importance. Velocity scaling analysis suggested the use of a 'significant wind' concept based on a combination of velocity magnitude and frequency. Similarity of precipitation rate was not essential, and could be altered within limits to adjust the time scale. The response of the model to the shape of model elements was significant. Although the model is distorted and inexact similarity is achieved, it appears useful on a practical basis.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 26 Seiten , Illustrationen
    Serie: CRREL Report 78-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Background Experimental design Similitude considerations The model Model operation Results Velocity Fence height Porosity Model correlation Summary and conclusions Recommeqdations for future work Literature cited Appendix A
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  • 69
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/10
    In: CRREL Report, 78-10
    Beschreibung / Inhaltsverzeichnis: The compressibility of wet snow is described in terms of pressure melting and nonlinear viscous deformation at grain contacts. The results of experiments with different salinities and liquid water contents are compared with computed densities. The decreasing compressibility of wet snow with increasing salinity and decreasing liquid content is quantified and explained. Simultaneous particle growth and the doubly charged layer at phase boundaries are included in the model. The results show that the density of wet snow increases approximately as a power of time but is highly dependent on the stress, initial particle size, liquid water content, and ionic impurity content of the snow.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 23 Seiten , Illustrationen
    Serie: CRREL Report 78-10
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Experimental procedure Grain growth Stressed particle contacts Fluid pressure Packing geometry Temperature distribution and heat flow Fluid and impurity flows Results The liquid film Conclusions Literature cited
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  • 70
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/31
    In: CRREL Report, 77-31
    Beschreibung / Inhaltsverzeichnis: Ten roofs in Concord, New Hampshire, were surveyed for wet insulation using a hand-held infrared camera. Suspected wet areas were marked on the roof with spray paint and roof samples were obtained to verify wet and dry conditions. Recommendations for maintenance and repair were made based on infrared findings, water contents, and visual examinations. An incremental economic study is presented to serve as a guide in determining the most cost-effective approach.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 29 Seiten , Illustrationen
    Serie: CRREL Report 77-31
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: US, customary to metric (SI) units of measurement Introduction Infrared camera Core samples State House State House Annex State Library Legislative Office Building Public Health Complex Highway Garage Fish and Game Offlces Supreme Court John O. Morton Building Department of Health and Welfare Laboratory Economics of roof reinsulation Conclusions and recommendations Literature cited
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  • 71
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/23
    In: CRREL Report, 77-23
    Beschreibung / Inhaltsverzeichnis: This report discusses the relationship between an architect and a behavioral scientist. Some of the discussion applies to this cooperative work for design of buildings. The bulk, however, relates to the cooperation of architect and behavioral scientist while conducting research. Examples from collaborative research at Alaskan military installations are cited which demonstrate the roles and contributions of the two disciplines.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 8 Seiten , Illustrationen
    Serie: CRREL Report 77-23
    Sprache: Englisch
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  • 72
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/21
    In: CRREL Report, 77-21
    Beschreibung / Inhaltsverzeichnis: Cold weather limits the successful application of built-up roofing, but often a roof installation must be completed late in the fall or in the winter. The loose-laid protected membrane roof with a synthetic sheet membrane can be installed in the middle of the winter with complete reliability. A synthetic membrane is traditionally more expensive than built-up roofing (rising crude oil prices, however, have reversed this condition), but it has two special features besides its suitability for winter installation: it can be placed on a damp deck, if necessary, and, being losse-laid, it does not split because of deck movement. This report documents information on the installation of two roofs in Anchorage, Alaska, during January and February 1972, including a discussion of the necessary snow removal from the bare deck and the use of portable shelters for preparing the lap joints between sheets during very cold weather. The winter installation caused no special construction problems and the advantages of the synthetic membrane make it an attractive alternative to built-up roofing. The cost of loose-laid protected membrane roofs in Alaska was, in 1972, nearly $300 per square ($28/sq.m), including insulation. Prices are rising as labor costs rise and as more insulation is specified.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 5 Seiten , Illustrationen
    Serie: CRREL Report 77-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction The protected membrane roof Winter construction considerations Construction costs Conclusion
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  • 73
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/19
    In: CRREL Report, 77-19
    In: Mechanics of cutting and boring, Part VI
    Beschreibung / Inhaltsverzeichnis: Abstract: The report deals with forces and power levels in cutting machines having adisc or drum that rotates about an axis perpendicular to the direction of advance. The forces on individual cutting tools are related to position on the rotor and to characteristics such as tool layout, rotor speed, rotor size, machine advance speed, and rotor torque. Integration leads to expressions for force components acting on the rotor axis, taking into account tool characteristics, cutting depth of the rotor, and rotor torque. These provide estimates of tractive thrust and thrust normal to the primary free surface. For self-propelled machines, this leads to considerations of traction, normal reaction, weight and balance, and power/weight ratios. Specific energy consumption is analyzed and related to machine characteristics and strength ofthe material being cut. Power per unit working area is discussed, and data for existing machines are summarized. Power requirements for ejection ofcuttings are analyzed, and the hydrodynamic resistance on underwater cuttings is treated. A number of worked examples are given to illustrate the principles discussed in the report.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vii, 36 Seiten , Illustrationen
    Serie: CRREL Report 77-19
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Foreword Introduction Terminology Forces on individual cutters Torque force and tool force Forces on the rotor axis Tractive thrust and down thrust Alternative tool force formulations Vehicle traction Power/weight ratio Weight and balance Force, torque, speed and power Specific energy Efficiency and performance index Power density Power requirements for ejection of cuttings Hydrodynamic resistance in underwater cutting
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  • 74
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/17
    In: CRREL Report, 77-17
    Beschreibung / Inhaltsverzeichnis: A literature search was made for information on the accretion of ice on ocean structures and on methods for control. The bulk of the reports were in Russian, with some additional Japanese, British, American, Canadian, and Icelandic sources. Analysis of icing reports indicated that sea spray is the most important cause of ship icing, with lesser amounts due to freezing rain, snow, and fog. Icing is a potential danger whenever air temperatures are below the freezing point of water and the sea temperature is 6 C or lower. Theoretical work on the ice accretion process is discussed, and a method is suggested, based on Russian experiments, for calculating the sea spray accumulation rate for cylindrical and flat surfaces as a function of water source temperature, air temperature, and wind speed. Other factors that influence icing severity are ship size and configuration, angle between ship course and water heading, and ship speed. Icing in the north temperate latitudes generally occurs in the rear of barometric depressions. Maps showing limits of various degrees of icing severity are included. Atmospheric icing measurements on tall land-based structures are presented, and potential maximum accumulations estimated. Control measures are discussed, though no completely effective method is available. Mechanical (impaction) methods are the most common, but experiments have been conducted on heated, icephobic, and deformable surfaces, and with freezing point depressants. No device for the unequivocal measurement of ice accumulation is available, though some experimental methods are suitable for controlled testing; it is recommended that a device be developed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 42 Seiten , Illustrationen
    Serie: CRREL Report 77-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric units of measurements Introduction The freezing proeess Icing observations Geographical distribution of icing and contributing meteorological conditions Extreme icing conditions Extremes of icc accumulation Prediction of icing occurrences Prediction of icing intensity and rate Control methods Measurement of icing rate Conclusions and recommendations Literature cited Appendix A. Maps of icing occurrence and rate Appendix B. Data for computing ship icing rates Appendix C. Estimation of ice accumulation
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  • 75
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/10
    In: CRREL Report, 76-10
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 25 Seiten , Illustrationen
    Serie: CRREL Report 76-10
    Sprache: Englisch
    Anmerkung: CONTENTS Introduction Experimental work SCR samples CAG samples CMS samples UAG samples SI samples Optical system Equipment Procedure Photographic work Large cracks and fissures Small damage to the surface Small damage to the buIk Results Damage as a function of the position x of the focal point; n(x) Damage as a function of the number of irradiations #; n(#) Damage as a function of crystallographic orientation ĉ; n (ĉ); p (ĉ) Damage as a function of surface structure Damage as a function of age A; n (A) Damage as a function of wavelength λ; p(λ) Systematic study of damage as a function of W, t, m and s; n(W, t, m, s) Analysis Fracture in ice Mechanisms for optically generated damage in transparent dielectrics Discussion of the results Summary and conclusions Literature cited
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  • 76
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/13
    In: CRREL Report, 76-13
    Beschreibung / Inhaltsverzeichnis: The thermal structure and ice conditions of Lake Champlain, a mid-latitude large lake, near Shelburne Point, Vermont, were studied during the winter of 1974-75. The lake was instrumented to a depth of 8.5 m with a string of highly calibrated thermistors, connected to a data logger on shore which recorded water temperatures every four hours. An ice mooring system was developed to anchor the thermistor string so that ice and water temperatures could be obtained at known levels. This temperature recording system measured vertical and horizontal variations in ice and water temperature regimes during ice formation, growth and decay. Meteorological data were measured during the winter period November 1974 through March 1975 at the site. Ice stratigraphy was determined for the ice at the site at its maximum seasonal growth for comparison with ice from St. Albans Bay (at the northern end of Lake Champlain) which had formed earlier. Correlations were determined between ice growth and accumulated degree days of freezing. The operation of a bubbler system installed near the measurement site around a service dock was observed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vii, 22 Seiten , Illustrationen
    Serie: CRREL Report 76-13
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Climate Site selection Instrumentation, measurements and calibration Installation of automatic water temperature recording system Visual observations and ice structure St. Albans Shelburne Analysis Temperature comparison Water temperature measuring system Changes in water temperature Wind Degree-days of freezing Prediction of ice formation Bubbler system Conclusions Recommendations Literature cited
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  • 77
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/8
    In: CRREL Report, 76-8
    Beschreibung / Inhaltsverzeichnis: During the past decade a number of methods for measuring the amount of unfrozen water in partially frozen ground have emerged. Means of quickly and simply predicting unfrozen water contents in clay have become increasingly important with the growth of interest in encapsulating clay soils compacted at low water contents to serve as base courses for roads. Unfortunately the measurements require sophisticated equipment and, in most instances, specially trained operators. In an effort to simplify the task of obtaining water-ice phase composition data, methods of calculating phase composition curves from other, simpler measurements on soils have been sought. The paper presents a method of deriving the measurement of unfrozen water contents at various temperatures from liquid limit determinations.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 9 Seiten , Illustrationen
    Serie: CRREL Report 76-8
    Sprache: Englisch
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  • 78
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/16
    In: CRREL Report, 76-16
    In: Mechanics of cutting and boring, (DE-B103)20210225152525
    Beschreibung / Inhaltsverzeichnis: This report, which is one of a series on the mechanics of cutting and boring in rock, deals with the kinematics of machines such as rotary drills, augers, tunnel boring machines, corers, and raise borers, in which the rotary cutting unit revolves about an axis that is parallel to the machine's direction of advance. The discussion and analysis cover the geometry and motion of various components of the cutting systems, including such topics as tool trajectories, tool speeds, motions of the more complicated mechanisms, chipping depth, penetration rates, production and clearance of cuttings, tool angles, and spatial distribution of cutters. Worked examples are given to illustrate the application of various equations to practical problems.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 45 Seiten , Illustrationen
    Serie: CRREL Report 76-16
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Foreword Terminology Trajectories of fixed tools Trajectories of roller cutters and indenters Speed of fixed cutting tools Speed of rolling disc cutters Speed and geometry of "wide" roller cutters Skidding rollers "Spiked" rollers Epicyclic or planetary mechanisms Chipping depth and penetration rate Chip production and cutting removal rate Balancing cutting and clearing rates in flight augers Tool relief angles - kinematic considerations Tool rake angles Distribution and spacing of cutting tools Radial tool spacing Angular tool spacing Spacing in the axial direction Literature cited
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  • 79
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/15
    In: CRREL Report, 76-15
    Beschreibung / Inhaltsverzeichnis: A literature review of revegetation and biological aspects of restoration research was completed for arctic and sub­arctic North America. Although there is a great deal of climatic variation in this region it is generally characterized by extreme conditions, such as a short growing season and permafrost. Most of the revegetation research has been undertaken in the last six years as a result of increased natural resource development. The primary goal has been erosion control, with aesthetics, minimization of thermokarst, and production of browse as other objectives. Revege­tation and long-term restoration methods depend upon such variables as the site conditions, nutrient regime (especially as this is influenced by the climatic conditions in the Arctic and Subarctic), plant adaptations, and the selection of native or introduced species. Technologies which have been developed to meet these conditions primarily include seedbed preparation, use of seed mixes, and fertilization and seeding methods. Most of the research has focused on the use of agronomic grasses and legumes. These are selected on the basis of a number of factors, such as cold hardiness and growth form prior to evaluation in the laboratory and the field. The most successful species to date have been Arctared fescue and Nugget bluegrass in the Arctic, while these two as well as creeping red fescue, meadow foxtail, Frontier reed canarygrass, Durar hard fescue, slender wheatgrass, and Icelandic poa did well in the Subarctic. Similar methods have been attempted to a more limited extent with evaluation of native herbaceous and woody species which seem promising on the basis of natural succession studies. There are a number of continuing research needs for arctic anc subarctic revegetation. These include fertilization strategies, development of specialized techniques (such as sprigging) for native species, and longer term studies. It is particularly important to integrate short term revegetatio methods with long-term restoration goals.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 32 Seiten , Illustrationen
    Serie: CRREL Report 76-15
    Sprache: Englisch
    Anmerkung: CONTENTS Page Abstract Preface Introduction Definition of revegetation Definition of restoration Objectives Some revegetation considerations Site conditions Nutrient regime Plant adaptations Native species vs introduced species Methods Seedbed preparation Seeding methods Timing of seeding Seed mixes Fertilization Agronomic grasses and legumes Selection criteria Laboratory evaluation Field evaluation Effect of revegetation methods Site conditions Maintenance of herbaceous cover Introduced woody species Native species — succession Significance of disturbance Primary succession Secondary succession Herbaceous native species Selection Laboratory evaluation Field evaluation Effect of revegetation methods Woody native species Selection Laboratory evaluation Field evaluation Native species and agronomic species, in combination Recommendations for research Summary Bibliography Appendix: Species tested
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  • 80
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    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/21
    In: CRREL Report, 76-21
    Beschreibung / Inhaltsverzeichnis: The effects of snow temperature and initial density on the stress vs density and stress vs deformation relationships were investigated for shallow compacted snow in the density range of 0.28 to 0.76 g/cu m, for stress range of 0.5 to 72 bars and a temperature range of -1 to -34 C at a deformation rate of 40 cm/s. A decrease in temperature increases the resistance to stress, the effect increasing with applied stress. For any stress, an increase in the initial density results in an increase in the resulting density, the effect decreasing with an increase in stress. The approximate yield envelopes, which define the stress required to initiate any deformation of snow of a particular density and temperature, were determined. Rapid compaction of snow results in extensive recrystallization, significantly different from that of naturally compacted snow. At a stress of 72 bars, transformation to ice occurs only at temperature above -10C.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 47 Seiten , Illustrationen
    Serie: CRREL Report 76-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature Introduction Description of study Sample preparation Test equipment and procedure Discussion of results Stress-density relationship Stress-deformation relationship Summary and conclusions Microstructural examination of artifically compacted snow Analytical techniques Results and discussion Conclusions Literature cited Appendix: Photographs of oscilloscope traces
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  • 81
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/22
    In: CRREL Report, 76-22
    Beschreibung / Inhaltsverzeichnis: Several membrane materials used or considered for MESL (membrane-enveloped soil layer) utilization of poor soils in road construction have been tested for cold effect on puncture and stiffness. PE (polyethylene) film was also tested for solvent soak effects. A simple blunt needle apparatus was devised for puncture testing. For plastic films (mainly PE), both puncture resistance and stiffness increase at low temperature (0 F, -18 C). For non-woven, spunbonded fabrics these properties are little affected by cold. For both non-wovens and PE film, puncture and bending strengths increase linearly with weight or thickness. The slope is steeper for the non-wovens, which generally are stronger on a per unit weight basis. PE film soaked in a hydrocarbon solvent swelled approximately 17% and lost about 30-40% its puncture strength. These effects are apparently reversible upon drying. Consideration has been given to sealing and patching requirements and to the drying of sealant liquids when adhering film to film. Also considered have been pos­sible slippage related to the reported low angle of friction of plastic films in soil and the possibility of lamination for improved membrane properties.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 60 Seiten , Illustrationen
    Serie: CRREL Report 76-22
    Sprache: Englisch
    Anmerkung: CONTENTS Page Abstract Preface Introduction Experimental Materials Apparatus Procedure Results Discussion PE solvent soak and swelling PE solvent soak and puncture Film puncture rate effect Bending orientation Comparative tables and graphs Puncture and temperature Bending and temperature Test result vs thickness and weight General considerations Conclusion and recommendations Literature cited Appendix Detailed data tables Denier explanation
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  • 82
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-76/23
    In: CRREL Report, 76-23
    Beschreibung / Inhaltsverzeichnis: This report describes the study of piles tested in polar snow at Camp Century, Greenland. More than 20 piles of various lengths and sizes were driven, including timber, closed-end and open-end steel pipe piles, and I- and H-piles. The H-piles were instrumented with strain gages. In addition to the driven piles, two purely end-bearing piles were installed in augered holes and five piles were frozen in place using a snow-water slurry. Driving records were obtained and are discussed. Analysis of the driving response of various piles revealed that the Hiley formula, and presumably other similar pile driving formulas, cannot be used to predict the ultimate supporting capacity of piles driven in snow. Factors such as pile inertia, rigidity, size, and tip resistance are discussed in relation to their apparent influence upon pile penetration. Pile load test procedures are described and test results are discussed. It was found that closed-end pipe piles are decidedly inferior to open-end pipe piles in their load-carrying capability and their ultimate supporting capacity. Although pile settlement was found to be dependent upon such variables as pipe load, time, pile shape, and snow temperature, precise effects of these variables were not determined. Nevertheless, the capability of open-end piles to carry quite heavy loads was demonstrated and a procedure is presented for testing these piles in snow.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 132 Seiten , Illustrationen
    Serie: CRREL Report 76-23
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Test site Pile driving equipment Test instrumentation Testing procedures Pile driving data Pile type vs driving resistance Closed-end vs open-end piles Calculated bearing capacity of pile Effect of pile driving on the embedment medium Pile inclination Slurried-in-place piles Pile load test data Strain gage instrumentation and results Pile excavation Discussion and conclusions Literature cited Appendix A: Theoretical elastic deflection of piles supported by skin friction Appendix B: Trench floor arching study
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  • 83
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    Tokyo : National Institute of Polar Research
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    Signatur: ZSP-592-14 ; ZSP-592-14(2.Ex.)
    In: Memoirs of National Institute of Polar Research
    Materialart: Schriftenreihen ausleihbar
    Seiten: IV, 229 S. : Ill., graph. Darst., Kt.
    Serie: Memoirs of National Institute of Polar Research : Special Issue 14
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 84
    Signatur: MOP 44979 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 276 Seiten , Illustrationen
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 85
    Signatur: MOP 45678 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 327 S. : graph. Darst.
    Sprache: Russisch
    Anmerkung: In kyrill. Schr.
    Standort: MOP - Bitte bestellen
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  • 86
    Signatur: M 93.0116
    Materialart: Monographie ausleihbar
    Seiten: IX, 619 S. : Ill.
    ISBN: 0471014885
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 87
    Signatur: MOP 40426 / Mitte
    In: Israel meteorological research papers
    Materialart: Monographie ausleihbar
    Seiten: ii, 175 Seiten , Illustrationen
    Serie: Israel meteorological research papers 1
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 88
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 9/M 93.0208/7
    In: Developments in economic geology
    Materialart: Monographie ausleihbar
    Seiten: XI, 280 S. : Ill., graph. Darst.
    ISBN: 044441567X
    Serie: Developments in economic geology 7
    Sprache: Englisch
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
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  • 89
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
    Signatur: M 93.0223
    Materialart: Monographie ausleihbar
    Seiten: XVI, 439 S. : zahlr. Ill.
    Ausgabe: corr. repr. of the 1. ed.
    ISBN: 3540073779
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 90
    Monographie ausleihbar
    Monographie ausleihbar
    London [u.a.] : Acad. Press
    Signatur: G 7720 ; M 93.0246
    Materialart: Monographie ausleihbar
    Seiten: XVII, 657 S. : graph. Darst.
    Ausgabe: 2. ed.
    ISBN: 0125962509
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 91
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: M 93.0229
    In: Developments in soil science
    Materialart: Monographie ausleihbar
    Seiten: XIV, 281 S. : graph. Darst.
    Ausgabe: 2. rev. ed.
    ISBN: 0444414355
    Serie: Developments in soil science 5A
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 92
    Signatur: M 93.0204
    Materialart: Monographie ausleihbar
    Seiten: 339 S. : graph. Darst.
    ISBN: 0912890088
    Sprache: Englisch
    Standort: Kompaktmagazin oben
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  • 93
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: M 93.0156
    In: Scientific Report
    Materialart: Monographie ausleihbar
    Seiten: IX, 328 S. + 1 Kt.-Beil.
    ISBN: 3540094407
    Serie: Scientific Report / Inter-Union Commission of Geodynamics 58
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 94
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 11/MR 90.0990 ; M 93.0094/3
    In: Handbook of strata-bound and stratiform ore deposits ; part I
    Materialart: Monographie ausleihbar
    Seiten: XI, 353 S.
    ISBN: 0444414037
    Sprache: Englisch
    Standort: Lesesaal
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 95
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam [u.a.] : Elsevier
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    Signatur: 11/M 93.0094/5
    In: Handbook of strata-bound and stratiform ore deposits ; part II
    Materialart: Monographie ausleihbar
    Seiten: XI, 319 S.
    ISBN: 0444414053
    Sprache: Englisch
    Standort: Lesesaal
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  • 96
    Monographie ausleihbar
    Monographie ausleihbar
    Amsterdam _[u.a.]_ : Elsevier
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    Signatur: 11/M 93.0094/6
    In: Handbook of strata-bound and stratiform ore deposits ; part II
    Materialart: Monographie ausleihbar
    Seiten: XVI, 585 S.
    ISBN: 0444414061
    Sprache: Englisch
    Standort: Lesesaal
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  • 97
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    Unbekannt
    Milton Keynes
    Signatur: 93.0257/3
    Seiten: 140 S.
    Serie: The Open University. Science. A second level course. The earth's physical resourses. S 266 , Block 3
    Sprache: Englisch
    Zweigbibliothek: GFZ Bibliothek
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  • 98
    facet.materialart.
    Unbekannt
    Milton Keynes
    Signatur: 93.0257/1
    Seiten: 52 S.
    Serie: The Open University. Science: A second level course. The earth's physical resources. S 266 , Block 1
    Sprache: Englisch
    Zweigbibliothek: GFZ Bibliothek
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  • 99
    facet.materialart.
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    Milton Keynes
    Signatur: 93.0257/2
    Seiten: 172 S.
    Serie: The Open University. Science: A second level course. S 266 , Block 2
    Sprache: Englisch
    Zweigbibliothek: GFZ Bibliothek
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  • 100
    Monographie ausleihbar
    Monographie ausleihbar
    Berlin [u.a.] : Springer
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    Signatur: 10/M 93.0251A/6
    In: Handbook of geochemistry
    Materialart: Monographie ausleihbar
    Seiten: Losebl.-Ausg.
    Sprache: Englisch
    Standort: Lesesaal
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