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  • 1
    Monograph available for loan
    Monograph available for loan
    Amsterdam [u.a.] : Elsevier
    Associated volumes
    Call number: 9/M 13.0083
    In: Developments in sedimentology
    Type of Medium: Monograph available for loan
    Pages: 471 S., Ill., graph. Darst., kt-.
    Series Statement: Developments in sedimentology 9A
    Language: English
    Location: Reading room
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  • 2
    Monograph available for loan
    Monograph available for loan
    Hoboken : Wiley-Interscience
    Call number: AWI S2-11-0056
    Description / Table of Contents: From a preeminent authority-a modern and applied treatment of multiway data analysis This groundbreaking book is the first of its kind to present methods for analyzing multiway data by applying multiway component techniques.
    Type of Medium: Monograph available for loan
    Pages: XXI, 579 S. : Ill., graph. Darst.
    ISBN: 9780470164976
    Series Statement: Wiley series in probability and statistics
    Language: English
    Note: Contents: Part 1: Data, Models, and Algorithms. - 1. Overture. - 2. Overview. - 3. Three-way and multiway data. - 4. Component models for fully-crossed designs. - 5. Algorithms for multiway models. - Part 2: Data Handling, Model Selection, and Interpertation. - 6. Preprocessing. - 7. Missing data in multiway analysis. - 8. Model and dimensionality selection. - 9. Interpreting component models. - 10. Improving interpretation through rotations. - 11. Graphical displays for components. - 12. Residuals, outliers, and robustness. - Part 3: Multiway Data and Their Analysis. - 13. Modeling multiway profile data. - 14. Modeling multiway rating scale data. - 15. Exploratory multivariate longitudinal analysis. - 16. Three-mode clustering. - 17. Multiway contingency tables. - 18. Three-way binary data. - 19. From three-way to four-way data and beyond. - Appendix A: Standard notation for mulitway analysis. - Appendix B: Biplots and their interpretation.
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  • 3
    Monograph available for loan
    Monograph available for loan
    London : ISTE [u.a.]
    Call number: M 14.0276
    Description / Table of Contents: Synthetic aperture radar provides broad-area imaging at high resolutions, which is used in applications such as environmental monitoring, earth-resource mapping, and military systems. This book presents the tools required for the digital processing of synthetic aperture radar images. They are of three types: (a) the elements of physics, (b) mathematical models and (c) image processing methods adapted to particular applications.
    Description / Table of Contents: Chapter 1. The physical basis of synthetic aperture radar imagery (Jean-Marie Nicolas and Sylvie Le Hegarat-Mascle). Chapter 2. The principles of synthetic aperture radar (Jean-Marie Nicolas and Frederic Adragna). Chapter 3. Existing satellite SAR systems (Jean-Marie Nicolas and Frederic Adragna). Chapter 4. Synthetic aperture radar images (Frederic Adragna, Sylvie Le Hegarat-Mascle and Jean-Marie Nicolas). Chapter 5. Speckle models (Armand Lopes, Rene Garello and Sylvie Le Hegarat-Mascle). Chapter 6. Estimation of reflectivity and filtering of SAR images (Armand Lopes, Florence Tupin and Sylvie Le Hegarat-Mascle). Chapter 7. Classification of SAR images (Danielle Ducrot, Florence Tupin and Sylvie Le Hegarat-Mascle). Chapter 8. Detection of points, contours and lines (Florence Tupin and Armand Lopes). Chapter 9. Geometry and relief (Frederic Adragna). Chapter 10. Radar-grammetry (Henri Maitre). Chapter 11. Radar-clinometry (Henri Maitre). Chapter 12. Interferometry (Frederic Adragna and Jean-Marie Nicolas). Chapter 13. Phase unwrapping (Emmanuel Trouve and Henri Maitre). Chapter 14. Radar oceanography (Jean-Marc Le Caillec and Rene Garello).
    Type of Medium: Monograph available for loan
    Pages: XVII, 382 S. : Ill., graph. Darst.
    ISBN: 9781848210240
    Series Statement: Digital signal and image processing series
    Uniform Title: Traitement des images de RSO
    Classification:
    Photogrammetry, Remote Sensing
    Language: English
    Location: Upper compact magazine
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  • 4
    Monograph available for loan
    Monograph available for loan
    New York : Freeman
    Call number: AWI A3-08-0023 ; PIK N 456-08-0279 ; PIK N 456-12-0032
    Type of Medium: Monograph available for loan
    Pages: XX, 388 Seiten , Illustrationen
    Edition: Second edition
    ISBN: 0716784904 , 9780716784906
    Language: English
    Note: Contents Preface PART I Framework of Climate Science CHAPTER 1 Overview of Climate Science Climate and Climate Change 1-1 Geologic Time Tools of Climate Science: Temperature Scales 1-2 How This Book Is Organized Development of Climate Science 1-3 How Scientists Study Climate Change Overview of the Climate System 1-4 Components of the Climate System 1-5 Climate Forcing 1-6 Climate System Responses 1-7 Time Scales of Forcing Versus Response 1-8 Differing Response Rates and Climate-System Interactions 1-9 Feedbacks in the Climate System Climate Interactions and Feedbacks: Positive and Negative Feedbacks CHAPTER 2 Climate Archives, Data, and Models Climate Archives, Dating, and Resolution 2-1 Types of Archives 2-2 Dating Climate Records 2-3 Climatic Resolution Climatic Data 2-4 Biotic Data 2-5 Geological and Geochemical Data Climate Models 2-6 Physical Climate Models 2-7 Geochemical Models PART II Tectonic-Scale Climate Change CHAPTER 3 CO2and Long-Term Climate Greenhouse Worlds Faint Young Sun Paradox Carbon Exchanges Between Rocks and the Atmosphere 3-1 Volcanic Input of Carbon from Rocks to the Atmosphere 3-2 Removal of CO2 from the Atmosphere by Chemical Weathering Climatic Factors That Control Chemical Weathering Is Chemical Weathering Earth’s Thermostat? 3-3 Greenhouse Role of Water Vapor Is Life the Ultimate Control on Earth’s Thermostat? 3-4 Gaia Hypothesis Looking Deeper into Climate Science: Organic Carbon Subcycle Was There a “Thermostat Malfunction”? A Snowball Earth? CHAPTER Plate Tectonics and Long-Term Climate Plate Tectonics 4-1 Structure and Composition of Tectonic Plates 4-2 Evidence of Past Plate Motions Polar Position Hypothesis 4-3 Glaciations and Continental Positions Since 500 Myr Ago Modeling Climate on the Supercontinent Pangaea 4-4 Input to the Model Simulation of Climate on Pangaea Looking Deeper into Climate Science: Brief Glaciation 440 Myr Ago 4-5 Output from the Model Simulation of Climate on Pangaea Tectonic Control of CO2 Input: BLAG Spreading-Rate Hypothesis 4-6 Control of CO2 Input by Seafloor Spreading 4-7 Initial Evaluation of the BLAG Spreading Rate Hypothesis Tectonic Control of CO2Removal: Uplift-Weathering Hypothesis 4-8 Rock Exposure and Chemical Weathering 4-9 Case Study: The Wind River Basin of Wyoming 4-10 Uplift and Chemical Weathering 4-11 Case Study: Weathering in the Amazon Basin 4-12 Weathering: Both a Climate Forcing and a Feedback? CHAPTER 5 Greenhouse Climate What Explains the Warmth 100 Myr Ago? 5-1 Model Simulations of the Cretaceous Greenhouse 5-2 What Explains the Data-Model Mismatch? 5-3 Relevance of Past Greenhouse Climate to the Future Sea Level Changes and Climate 5-4 Causes of Tectonic-Scale Changes in Sea Level 5-5 Effect of Changes in Sea Level on Climate Looking Deeper into Climate Science: Calculating Changes in Sea Level Asteroid Impact Large and Abrupt Greenhouse Episode near 50 Myr Ago CHAPTER 6 From Greenhouse to Icehouse: The Last 50 Million Years Global Climate Change Since 50 Myr Ago 6-1 Evidence from Ice and Vegetation 6-2 Evidence from Oxygen Isotope Measurements 6-3 Evidence from Mg/Ca Measurements Do Changes in Geography Explain the Cooling? 6-4 Gateway Hypothesis 6-5 Assessment of Gateway Changes Hypotheses Linked to Changes in CO2 6-6 Evaluation of the BLAG Spreading Rate Hypothesis 6-7 Evaluation of the Uplift Weathering Hypothesis Climate DebateTiming of the Uplift in Western North America Future Climate Change at Tectonic Scales Looking Deeper into Climate Science: Organic Carbon: Monterrey Hypothesis PART III Orbital-Scale Climate Change CHAPTER 7 Astronomical Control of Solar Radiation Earth’s Orbit Today 7-1 Earth’s Tilted Axis of Rotation and the Seasons 7-2 Earth’s Eccentric Orbit: Distance Between Earth and Sun Long-Term Changes in Earth’s Orbit 7-3 Changes in Earth’s Axial Tilt Through Time Tools of Climate Science: Cycles and Modulation 7-4 Changes in Earth’s Eccentric Orbit Through Time 7-5 Precession of the Solstices and Equinoxes Around Earth’s Orbit Looking Deeper into Climate Science: Earth’s Precession as a Sine Wave Changes in Insolation Received on Earth 7-6 Insolation Changes by Month and Season 7-7 Insolation Changes by Caloric Seasons Searching for Orbital-Scale Changes in Climatic Records 7-8 Time Series Analysis 7-9 Effects of Undersampling Climate Records 7-10 Tectonic-Scale Changes in Earth’s Orbit CHAPTER 8 Insolation Control of Monsoons Monsoon Circulations 8-1 Orbital-Scale Control of Summer Monsoons Orbital-Scale Changes in North African Summer Monsoons 8-2 “Stinky Muds” in the Mediteranean 8-3 Freshwater Diatoms in the Tropical Atlantic 8-4 Upwelling in the Equatorial Atlantic Orbital Monsoon Hypothesis: Regional Assessment 8-5 Cave Speleothems in China and Brazil 8-6 Phasing of Summer Monsoons Looking Deeper into Climate Science: Insolation-Driven Monsoon Responses: Chronometer for Tuning Monsoon Forcing Earlier in Earth’s History 8-7 Monsoons on Pangaea 200 Myr Ago 8-8 Joint Tectonic and Orbital Control of Monsoons CHAPTER 9 Insolation Control of Ice Sheets Milankovitch Theory: Orbital Control of Ice Sheets Modeling the Behavior of Ice Sheets 9-1 Insolation Control of Ice Sheet Size 9-2 Ice Sheets Lag Behind Summer Insolation Forcing 9-3 Delayed Bedrock Response Beneath Ice Sheets Looking Deeper into Climate Science: Ice Volume Response to Insolation 9-4 Full Cycle of Ice Growth and Decay 9-5 Ice Slipping and Calving Northern Hemisphere Ice Sheet History 9-6 Ice Sheet History: δ18O Evidence 9-7 Confirming Ice Volume Changes: Coral Reefs and Sea Level Is Milankovich’s Theory the Full Answer? Looking Deeper into Climate Science: Sea Level on Uplifting Islands CHAPTER 10 Orbital-Scale Changes in Carbon Dioxide and Methane Ice Cores 10-1 Drilling and Dating Ice Cores 10-2 Verifying Ice-Core Measurements of Ancient Air 10-3 Orbital-Scale Carbon Transfers: Carbon Isotopes Orbital-Scale Changes in CO2 10-4 Where Did the Missing Carbon Go? 10-5 δ13C Evidence of Carbon Transfer How Did the Carbon Get into the Deep Ocean? 10-6 Increased CO2 Solubility in Seawater 10-7 Biological Transfer from Surface Waters A Closer Look at Climate Science: Using δ13C to Measure Carbon Pumping 10-8 Changes in Deep-Water Circulation Orbital-Scale Changes in CH4 Orbital-Scale Climatic Roles: CO2and CH4 CHAPTER 11 Orbital-Scale Interactions, Feedbacks, and Unsolved Problems Climatic Responses Driven by the Ice Sheets Mystery of the 41,000-Year Glacial World 11-1 Did Insolation Really Vary Mainly at 41,000 Years? 11-2 Interhemispheric Cancellation of 23,000-Year Ice Volume Responses? 11-3 CO2 Feedback at 41,000 Years? Mystery of the ~100,000-Year Glacial World 11-4 How Is the Northern Ice Signal Transferred South? Why did the Northern Ice Sheets Vary at ~100,000 Years? Looking Deeper into Climate Science: Link Between Forcing and the Time Constants of Ice Response 11-5 Ice Interactions with Bedrock 11-6 Ice Interactions with the Local Environment 11-7 Ice Interactions with Greenhouse Gases PART IV Deglacial Climate Change CHAPTER 12 Last Glacial Maximum Glacial World: More Ice, Less Gas 12-1 Project CLIMAP: Reconstructing the Last Glacial Maximum 12-2 How Large Were the Ice Sheets? 12-3 Glacial Dirt and Winds Testing Model Simulations Against Biotic Data 12-4 COHMAP: Data-Model Comparisons 12-5 Pollen: Indicator of Climate on the Continents 12-6 Using Pollen for Data-Model Comparisons Data-Model Comparisons of Glacial Maximum Climates 12-7 Model Simulations of Glacial Maximum Climates 12-8 Climate Changes near the Northern Ice Sheets 12-9 Climate Changes far from the Northern Ice Sheets How Cold Were the Glacial Tropics? 12-10 Evidence for a Small Tropical Cooling 12-11 Evidence for a Large Tropical Cooling 12-12 Actual Cooling Was Medium-Small CHAPTER 13 Climate During and Since the Last Deglaciation Fire and Ice: Shift in the Balance of Power 13-1 When Did the Ice Sheets Melt? 13-2 Coral Reefs and Rising Sea Level 13-3 Glitches in the Deglaciation: Deglacial Two-Step To
    Location: AWI Reading room
    Location: A 18 - must be ordered
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  • 5
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/20
    In: CRREL Report, 78-20
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 48 Seiten , Illustrationen
    Series Statement: CRREL Report 78-20
    Language: English
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  • 6
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/19
    In: CRREL Report, 78-19
    Type of Medium: Series available for loan
    Pages: iv, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 78-19
    Language: English
    Note: 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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  • 7
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/17
    In: CRREL Report, 78-17
    Description / Table of Contents: Abstract: This investigation utilized historical and recent aerial photographs and satellite imagery in 1) estimating changes in positions of the high-water line and sea cliff break and base, in rates of accretion and/or erosion, and in volumes of transported sediment, and 2) providing a preliminary evaluation of the direction of littoral transport along the outer Cape Cod coast. Using aerial photographs acquired in 1938, 1952, 1971 and 1974 with manual photointerpretation techniques, changes in the distances from selected reference points to the cliff break, cliff base and the high-water line were measured. LANDSAT-1 and -2 imagery acquired from 1 September 1972 to 28 May 1975 was evaluated for use in determining the directions of littoral transport that are active the predominant amount of time. Although the imagery has been very useful for this purpose at other locations, it proved to be useless along the outer shore of Cape Cod. Largest net migrations of the high water line from 1938 to 1974 occurred in the northern and southern portions of this coast. The northern maximum high water line was 321.4 ft, the southern was 1794.6 ft. The central portion of the coast was generally more stable with changes varying from 6.8 to 157.6 ft. Cliff-base recession rates varied from 0.4 to 7.3 ft/yr. Maximum estimated net volume of sediment deposited per linear foot of beach from 1938 to 1974 was 334 yd^3 (based on 2 yd^3/ft of recession or accretion); maximum eroded was 914 yd^3. Changes in the configuration of spits were used to evaluate directions of littoral transport since suspended sediment concentrations were generally not sufficient to act as natural tracers of surface currents. Based on the literature and a determination of the portion of the coast perpendicular to the direction of dominant wave approach, the location of the nodal zone for predominant littoral directions of drift probably shifts between the area near Spectacle Pond and North Truro Air Force Station. This investigation has illustrated a photo interpretation technique that is useful in performing a reconnaissance of coastal change. The data obtained from this method can be used to supplement those acquired by ground surveys and are valid as first approximations for planning subsequent, more detailed surveys.
    Type of Medium: Series available for loan
    Pages: vi, 49 Seiten , Illustrationen
    Series Statement: CRREL Report 78-17
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric units of measurement Introduction Background Previous investigations Analytical procedures Results and discussion Shoreline changes: High-water line Shoreline changes: Cliff recession Volumetric changes Nodal zone location and direction of littoral transport Error evaluation Summary and conclusions Future research Selected bibliography Appendix A: Maps of shoreline with overlays for 1938, 1952, 1971 and 1974 Appendix B: Supplementary data for estimating shoreline change
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  • 8
    Call number: ZSP-201-78/9
    In: CRREL Report, 78-9
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 14 Seiten , Illustrationen
    Series Statement: CRREL Report 78-9
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test sites and ice cover properties Beam testing Results Discussion Conclusions Literature cited
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  • 9
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/8
    In: CRREL Report, 78-8
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 78-8
    Language: English
    Note: 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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  • 10
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/7
    In: CRREL Report, 78-7
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iii, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 78-7
    Language: English
    Note: 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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  • 11
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/5
    In: CRREL Report, 78-5
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iii, 32 Seiten , Illustrationen
    Series Statement: CRREL Report 78-5
    Language: English
    Note: 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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  • 12
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/3
    In: CRREL Report, 78-3
    Description / Table of Contents: 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
    Type of Medium: Series available for loan
    Pages: iii, 22 Seiten , Illustrationen
    Series Statement: CRREL Report 78-3
    Language: English
    Note: 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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  • 13
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/1
    In: CRREL Report, 78-1
    Description / Table of Contents: The results of axial double point-load tests on disk samples of snow and ice obtained from the area of McMurdo Sound, Antarctica, are presented. They show the effects of temperature, sample length, load point diameter and specific gravity on failure load. It was determined that 13 samples should be tested to obtain a representative mean strength index. The results show that the axial double point-load test has good possibilities as a rapid field test for determining the unconfined comrpessive strength of snow and ice but that further evaluation of the variables affecting test results must be made.
    Type of Medium: Series available for loan
    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: CRREL Report 78-1
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test procedure Test program Test samples Number of test for determining strength index Effect of temperature Effect of sample length Effect of load point size Tests on snow Discussion Recommendations Literature cited
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  • 14
    Call number: ZSP-201-78/4
    In: CRREL Report, 78-4
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: vi, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 78-4
    Language: English
    Note: 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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  • 15
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/2
    In: CRREL Report, 78-2
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 31 Seiten , Illustrationen
    Series Statement: CRREL Report 78-2
    Language: English
    Note: 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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  • 16
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/32
    In: CRREL Report, 77-32
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 77-32
    Language: English
    Note: 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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  • 17
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/23
    In: CRREL Report, 77-23
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: 8 Seiten , Illustrationen
    Series Statement: CRREL Report 77-23
    Language: English
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  • 18
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/21
    In: CRREL Report, 77-21
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: 5 Seiten , Illustrationen
    Series Statement: CRREL Report 77-21
    Language: English
    Note: CONTENTS Abstract Preface Introduction The protected membrane roof Winter construction considerations Construction costs Conclusion
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  • 19
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/11
    In: CRREL Report, 77-11
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 40 Seiten , Illustrationen
    Series Statement: CRREL Report 77-11
    Language: English
    Note: 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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  • 20
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/19
    In: CRREL Report, 77-19
    In: Mechanics of cutting and boring, Part VI
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: vii, 36 Seiten , Illustrationen
    Series Statement: CRREL Report 77-19
    Language: English
    Note: 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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  • 21
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/18
    In: CRREL Report, 77-18
    Description / Table of Contents: Abstract: Models originally developed to describe the arching and the movement of granular materials through hoppers or chutes are applied to the arching and drift of pack ice in straits and gulfs having lengths of 50 to 500 km. Verification of the usefulness of the models is attempted by making comparisons with ice deformation patterns as observed via satellite imagery in the Bering Strait region and in Amundsen Gulf. The results are encouraging in that there is good correspondence between observed arching and lead patterns and those predicted by theory. In addition, values determined via the model for the angle of internal friction (≈ 30° to 35°) and the cohesive strength per unit thickness (≈ 2000 N/m) are similar to values obtained by other approaches. It is estimated that if the wind velocity parallel to the Bering Strait exceeds ≈ 6 m/s, there will be ice flow through the strait.
    Type of Medium: Series available for loan
    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: CRREL Report 77-18
    Language: English
    Note: CONTENTS Abstract Preface Introduction Theory Limiting span of an arch Flow of pack ice through converging channels Stoppage of flow Applications St. Lawrence Amundsen Gulf Bering Strait Conclusion References
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  • 22
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/16
    In: CRREL Report, 77-16
    Description / Table of Contents: A brief discussion is given of the ways an icebreaker breaks ice. Since the icebreaking process is so complex, the solution of a mathematical model does not appear to be feasible. As an alternative, it is suggested that physical models be used to design icebreakers. The appropriate scaling laws for physical models are developed and their practical limitation discussed.
    Type of Medium: Series available for loan
    Pages: ii, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 77-16
    Language: English
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  • 23
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/17
    In: CRREL Report, 77-17
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 42 Seiten , Illustrationen
    Series Statement: CRREL Report 77-17
    Language: English
    Note: 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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  • 24
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/15
    In: CRREL Report, 77-15
    Description / Table of Contents: A laboratory experimental study was conducted on a scale model of an annular flow ice-water heat sink to be used to store the waste heat produced in a hardened defense installation operating in an isolated mode. The study ex­amined: 1) scaling relationships for predicting the performance of prototype units using data from scale models, 2) the accuracy of a computer prediction technique developed during an earlier study, 3) the heat transfer phenom­enon at the ice-water interface, and 4) some practical aspects related to the operation of a prototype installation. The scaling relationships and the computer program were found to be sufficiently accurate for use in developing a proto­type sink design. During operation the scale model sink provided an almost constant low temperature source of coolant water for approximately one-half its useful life and thereafter behaved like an ordinary stored water reservoir type heat sink. No significant operational problems were discovered.
    Type of Medium: Series available for loan
    Pages: vii, 54 Seiten , Illustrationen
    Series Statement: CRREL Report 77-15
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Conversion factors: U.S. customary to metric units of measurement Introduction Description of experiment Apparatus Test procedure Experimental results Summary of experimental tests Influence of coolant water flow rates Approximation of the rate of melting Comparison of experimental and computed results Comparative analysis of the model sinks Approximation of the heat transfer coefficient Conclusions and recommendations Literature cited Appendix A. Experimental data, heat sink Model II Appendix B. Heat sink scaling and similarity relationships Appendix C. Derivation of the relationships for the heat transfer coefficient, Reynolds and Nusselt numbers Appendix D. Determination of freezing rates and refrigeration loads Appendix E. Approximation of stresses in the heat sink tank
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  • 25
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/12
    In: CRREL Report, 77-12
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: vii, 19 Seiten , Illustrationen
    Series Statement: CRREL Report 77-12
    Language: English
    Note: 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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  • 26
    Call number: ZSP-403-305
    In: Jare Data Reports
    Type of Medium: Monograph available for loan
    Pages: 183 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 305 : Ionosphere 77
    Language: English
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  • 27
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge Univ. Press
    Call number: 10/M 08.0431
    Description / Table of Contents: Contents: 1. Isotopes and radioactivity; 2. The principles o radioactive dating; 3. Radiometric dating methods; 4. Dating by cosmogenic isotopes; 5. Uncertainties and results of radiometric dating; 6. Radiogenic isotope geochemistry; 7. Stable isotope geochemistry; 8. Isotope geology and dynamic reservoir analysis
    Type of Medium: Monograph available for loan
    Pages: 512 S.
    ISBN: 0521862280 , 978-0-521-86228-8
    Uniform Title: Géologie isotopique
    Classification:
    Geochemistry
    Language: English
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  • 28
    Monograph available for loan
    Monograph available for loan
    København : Nyt Nordisk Forl.
    Associated volumes
    Call number: ZSP-553-204,1
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 22 S. + Beil
    ISBN: 8717023785
    Series Statement: Meddelelser om Grønland 204,1
    Language: English
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  • 29
    Call number: ZSP-168-572
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource.
    Series Statement: Berichte zur Polar- und Meeresforschung 572
    Language: English
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  • 30
    Call number: ZSP-168-583
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (167 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 583
    Language: English
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  • 31
    facet.materialart.12
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-586
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (147 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 586
    Language: English
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  • 32
    Call number: ZSP-168-569
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (153 S.). : graph. Darst.
    Series Statement: Berichte zur Polar- und Meeresforschung 569
    Language: English
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  • 33
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/27
    In: CRREL Report, 78-27
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iii, 22 Seiten , Illustrationen
    Series Statement: CRREL Report 78-27
    Language: English
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  • 34
    Call number: ZSP-201-78/28
    In: CRREL Report, 78-28
    Type of Medium: Series available for loan
    Pages: x, 112 Seiten , Illustrationen
    Series Statement: CRREL Report 78-28
    Language: English
    Note: 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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  • 35
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/30
    In: CRREL Report, 77-30
    Description / Table of Contents: Abstract: Ageneral computer model to simulate municipal snow removal has been developed. Programs which aid in the routing of snowplows are a part of this package. Once vehicle routes are created, the simulation program can be used to assess situations varying both equipment and meteorological parameters. Time for each plow to complete its route is calculated. Considerations are made for the above variable parameters plus plowing windrow, route starting depth, overlapping truck routes and intersection delay time. The effects of storm length, snowfall rate and starting depth on total plowing time are examined in a test case.
    Type of Medium: Series available for loan
    Pages: ii, 7 Seiten , Illustrationen
    Series Statement: CRREL Report 77-30
    Language: English
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  • 36
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/7
    In: CRREL Report, 77-7
    In: Mechanics of cutting and boring, IV
    Description / Table of Contents: The report deals with the cutting of rock and similar materials by parallel motion tools. It examines cutting forces and energy requirements, taking into consideration tool geometry, wear, operating conditions, and material properties. After an introductory discussion of terminology, some general principles are outlined, and relevant theoretical ideas on metal cutting and rock cutting are reviewed. The next section, which is the heart of the report, reviews experimental data on the magnitudes and directions of cutting forces. There is a graphical compilation of data, including some from obscure or unpublished sources. The variables covered include chipping depth, rake angle, relief angle, side rake, base angle, tool width, tool compliance, tool speed, tool wear, tool interactions, and material properties. The second major part of the report treats the energetics of cutting. It begins with a short discussion of relevant principles, and continues with a compilation and review of experimental data, covering the same independent variables as the force section. The report ends with a concise summary of general behavior for parallel motion tools.
    Type of Medium: Series available for loan
    Pages: xi, 85 Seiten , Illustrationen
    Series Statement: CRREL Report 77-7
    Language: English
    Note: CONTENTS Abstract Preface Foreword Introduction Terminology Principles of cutting Forces acting on a single cutter Theoretical Ideas on cutting Experimental data on cutting forces Effect of chipping depth on tool forces Effect of rake angle on tool forces Effect of relief angle on cutting forces Effect of side rake on tool forces Effect of base angle or face profile on tool forces Effect of rounding at the cutting edge Effect of tool width on cutting forces Tool compliance and force fluctuations Effect of tool speed on cutting forces Effect of rock properties on cutting forces Tool interaction and kerf spacing Effect of multiple pass cutting on tool forces Effect of tool wear on cutting forces Development of wear Energetics of cutting Energetics of parallel-motion tools Variation of specific energy with chipping depth for a single tool Effect of rake angle on specific energy Effect of relief angle on specific energy Effect of side rake on specific energy Effect of base angle or face profile on specific energy Effect of tip radius on specific energy Effect of tool width on specific energy Effect of tool speed on specific energy Variation of specific energy with rock properties Effect of kerf spacing on specific energy Effect of multiple pass cutting on specific energy Effect of tool wear on specific energy General summary Literature cited Appendix Α. Additional data for ice Appendix Β. Conversion factors: U.S. customary and metric units of measurement
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  • 37
    Monograph available for loan
    Monograph available for loan
    London [u.a.] : Earthscan
    Call number: PIK N 076-08-0142
    Type of Medium: Monograph available for loan
    Pages: XIX, 248 S. : graph. Darst., Kt.
    ISBN: 9781844075362
    Uniform Title: Welt im Wandel: Sicherheitsrisiko Klimawandel
    Language: English
    Location: A 18 - must be ordered
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  • 38
    Call number: PIK N 453-08-0117 ; AWI P7-22-6890
    In: Les rapports du Sénat, 230
    Type of Medium: Monograph available for loan
    Pages: 214 Seiten , Illustrationen
    Series Statement: Les rapports du Sénat 230
    Language: English
    Note: CONTENTS COMPOSITION OF THE OFFICE CONTENTS INTRODUCTION I. THE POLAR REGIONS: AN URGENT NEED FOR PROTECTION A. EXTREME BUT FRAGILE REGIONS 1. The Arctic Ocean 2. Antarctica B. FRANCE'S RESPONSIBILITY IN THE ANTARCTICA TREATY 1. The origins of the treaty and the Antarctic system 2. Mining a suspended issue 3. Tourism: a new peaceful threat? II. THE POLES: THEIR KEY ROLE IN UNDERSTANDING CLIMATE CHANGE A. UNDERSTANDING PAST CLIMATES TO UNDERSTAND THE FUTURE CLIMATE 1. Recent ice cores from Greenland 2. lce cores from Antarctica 3. Ocean core samples: the transpolar link 4. The future of glacial core sampling B. THERMOHALINE CIRCULATION 1. The general circulation system 2. The importance of the creation of cold, deep waters 3. The Antarctic Ocean, a carbon sink C. THE POLAR REGIONS AT THE HEART OF GLOBAL CLIMATE CHANGE 1. Will the Arctic ice shelf disappear in the summer? 2. Will Greenland melt completely? 3. Can a diagnosis be made concerning the assessment of Antarctica's mass? III. FRANCE'S FIRST-CLASS BIOLOGICAL RESEARCH A. AN EXCEPTIONAL HERITAGE 1. A unique geographic situation 2. 40 to 50 years of continuous observations B. ADAPTING TO GLOBAL CLIMATE CHANGE AND EXTREME ENVIRONMENTS 1. Adapting to climate change 2. Understanding the adaptation to extreme environments C. INNOVATIVE RESEARCH 1. The equipment of animals 2. Hormonal, molecular and genetic research 3. The implications for the organization of research IV. OBSERVING THE EARTH, OBSERVING THE UNIVERSE A. OBSERVATORIES FOR THE EARTH AND THE UPPER ATMOSPHERE 1. Seismology 2. Measuring gravity and terrestrial magnetism 3. Studying the stratosphere and monitoring the ozone layer '1. Observing the ionosphere B. ANTARCTIC ASTRONOMY: A NEW FIELD 1. Recognizing this fast-growing discipline 2. Concordia: the best site in the world/or astronomic observations? 3. Searching for meteorites in Antarctica 4. Measuring cosmic radiation V. PREPARING THE SPACE MISSIONS IN ANTARCTICA A. PREPARING AND VALIDATING THE SATELLITE MISSIONS 1. Space and the polar regions: preparation complementarity 2. Validating on the ground observations made from space B. PREPARING MANNED SPACE FLIGHTS AND MOON OR MARS-BASED STATIONS 1. Concordia - a unique research site 2. Studying behaviour in an extreme environment 3. Physiological studies C. TESTING EXPLORATION MATERIAL 1. American examples and projects 2. European perspectives VI. FRANCE'S PRESENCE IN THE POLAR REGIONS A. DEVELOPING FRANCE'S PRESENCE IN THE ARCTIC, STRENGTHENING ITS PRESENCE IN ANTARCTICA 1. Developing France's Arctic presence 2. Strengthening our presence in the southern regions B. IPEV (THE FRENCH PAUL-EMILE VICTOR INSTITUTE), AN AGENCY OF MEANS VII. INTERNATIONAL COOPERATION: A NECESSITY AND A GOAL A. HOW TO ENCOURAGE A EUROPEAN PROCESS? 1. The European Union: a sufficient framework? 2. The practical and political limitations of cooperation 3. Towards an Italian-German-French engine? B. WHAT INTERNATIONAL COOPERATION FOR FRANCE ON THE EVE OF THE IPY? 1. Excellence, proximity and longevity: three key criteria for cooperation 2. Developing a network for the stations VIII. THE RAPPORTEUR'S CONCLUSIONS AND PROPOSALS 1. Strategic regions 2. Regions to protect 3. Essential regions for understanding climate change 4. Life in the polar regions: of great value to humanity 5. The polar regions: an observatory for the Earth 6. Strongly support the development of astronomy at Concordia 7. Take advantage of the polar regions' complementarity with the space missions 8. Strengthen France's presence in the polar regions 9. Reorganize France's presence in the polar regions 10. Better coordinate polar research 11. Solve the problem of insufficient funding for polar-research logistics 12. Define a French strategy for European and international cooperation APPENDICES SPEAKERS PROCEEDINGS OF THE 1 MARCH 2007 SEMINAR: "OPENING OF THE INTERNATIONAL POLAR YEAR IN FRANCE" PART ONE: LUNCH-DEBATE I. MR. HENRI REVOL, PRESIDENT OF THE OPECST II. MR. JEAN-LOUIS ETIENNE PART TWO: OFFICIAL OPENING SESSION I. INTRODUCTION A. MR. CHRISTIAN GAUDIN, SENATOR, RAPPORTEUR FOR THE OPECST B. MS. CATHERINE BRECHIGNAC, PRESIDENT OF THE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) C. MR. MICHEL JARRAUD, SECRETARY-GENERAL OF THE WORLD METEOROLOGICAL ORGANIZATION D. MR. CHRISTIAN COINTAT, SENATOR, PRESIDENT OF THE ANTARCTIC AND ARTIC STUDY GROUP II. OFFICIAL OPENING OF THE INTERNATIONAL POLAR YEAR IN FRANCE BY MR. CHRISTIAN PONCELET, PRESIDENT OF THE SENATE III. THEMATIC DEBATE-THE POLES: INDICATORS AND EVIDENCE FOR MANKIND A. MS. NELLY OLIN, MINISTER OF ECOLOGY AND SUSTAINABLE DEVELOPMENT B. MS. VALERIE MASSON-DELMOTTE, CLIMATOLOGIST, CEA C. MR. YVON LE MAHO, BIOLOGIST, CNRS D. MS. JOELLE ROBERT-LAMBLIN, ANTHROPOLOGIST, CNRS E. DEBATE IV. CLOSING SPEECHES A. MR. FRAN〈;:OIS GOULARD, MINISTER FOR HIGHER EDUCATION AND RESEARCH B. HIS SERENE HIGHNESS PRINCE ALBERT II OF MONACO APPENDICES APPENDIX 1: DOCUMENTS PRESENTED BY MS. VALERIE MASSONDELMOTTE, CLIMATOLOGIST - CEA APPENDIX 2: DOCUMENTS PRESENTED BY MS. JOELLE ROBERTLAMBLIN, ANTHROPOLOGIST - CNRS APPENDIX 3: DOCUMENTS PRESENTED BY MR. YVON LE MAHO, BIOLOGIST- CNRS
    Location: A 18 - must be ordered
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  • 39
    Monograph available for loan
    Monograph available for loan
    Brussels : European Commission
    Call number: 2/M 08.0298
    Type of Medium: Monograph available for loan
    Pages: 139 S.
    ISBN: 9789279066658
    Uniform Title: Open access - Chancen und Herausforderungen
    Classification:
    E.7.
    Language: English
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  • 40
    Monograph available for loan
    Monograph available for loan
    Associated volumes
    Call number: ZSP-125-2002
    In: Antarctic Automatic Weather Station Data for the Calender Year ...
    Type of Medium: Monograph available for loan
    Pages: 48 S. ; graph. Darst.
    Language: English
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  • 41
    Call number: ZSP-589-7
    In: NIPR Arctic Data Reports
    Type of Medium: Monograph available for loan
    Pages: 79 S. : überw. graph. Darst.
    ISSN: 1342-4033
    Series Statement: NIPR Arctic Data Reports 7
    Language: English
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  • 42
    Call number: ZSP-166-263
    In: Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen
    Type of Medium: Series available for loan
    Pages: 119 S. : Ill., graph. Darst.
    ISSN: 0931-0800
    Series Statement: Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen 263
    Language: English
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  • 43
    Call number: AWI G5-09-0014
    Type of Medium: Dissertations
    Pages: ix, 120 S. : graph. Darst.
    Language: English
    Note: Potsdam, Univ., Diss., 2008
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  • 44
    Call number: AWI G8-09-0017 ; AWI G8-09-0017(2. Ex.)
    Type of Medium: Monograph available for loan
    Pages: XII, [36], 756 Seiten , Illustrationen
    Edition: Sixth edition
    ISBN: 9780470052457
    Language: English
    Note: Contents: 1 Concepts and Foundations of Remote Sensing. - 1.1 Introduction. - 1.2 Energy Sources and Radiation Principles. - 1.3 Energy Interactions in the Atmosphere. - 1.4 Energy Interactions with Earth Surface Features. - 1.5 Data Acquisition and Interpretation. - 1.6 Reference Data. - 1.7 The Global Positioning System. - 1.8 Characteristics of Remote Sensing System. - 1.9 Successful Application of Remote Sensing. - 1.10 Geographic Information Systems. - 1.11 Organization of the Book. - Works Cited. - 2 Elements of Photographic Systems. - 2.1 Introduction. - 2.2 Early History of Aerial Photography. - 2.3 Photographic Basics. - 2.4 Film Photography. - 2.5 Digital Photography. - 2.6 Aerial Cameras. - 2.7 Spatial Resolution of Camera Systems. - 2.8 Aerial Videography. - 2.9 Multiband Imaging. - 2.10 Conclusion. - Works Cited. - 3 Basic Principles of Photogrammetry. - 3.1 Introduction. - 3.2 Basic Geometric Characteristics of Aerial Photographs. - 3.3 Photographic Scale. - 3.4 Ground Coverage of Aerial Photographs. - 3.5 Area Measurement. - 3.6 Relief Displacement of Vertical Features. - 3.7 Image Parallax. - 3.8 Ground Control for Aerial Photography. - 3.9 Production of Maps and Orthophotos. - 3.10 Flight Planning. - 3.11 Conclusion. - Works Cited. - 4 Introduction to Visual Image Interpretation. - 4.1 Introduction. - 4.2 Fundamentals of Visual Image Interpretation. - 4.3 Basic Visual Image Interpretation Equipment. - 4.4 Land Use/Land Cover Mapping. - 4.5 Geologic and Soil Mapping. - 4.6 Agricultural Applications. - 4.7 Forestry Applications. - 4.8 Rangeland Applications. - 4.9 Water Resource Applications. - 4.10 Urban and Regional Planning Applications. - 4.11 Wetland Mapping. - 4.12 Wildlife Ecology Applications. - 4.13 Archaeological Applications. - 4.14 Environmental Assessment. - 4.15 Natural Disaster Assessment. - 4.16 Principles of Landform Identification and Evaluation. - Works Cited. - 5 Multispectral, Thermal, and Hyperspectral Sensing. - 5.1 Introduction. - 5.2 Across-Track Scanning. - 5.3 Along-Track Scanning. - 5.4 Example Across-Track Multispectral Scanner and Imagery. - 5.5 Example Along-Track Multispectral Scanner and Imagery. - 5.6 Geometric Characteristics of Across-Track Scanner Imagery. - 5.7 Geometric Characteristics of Along-Track Scanner Imagery. - 5.8 Thermal Scanning. - 5.9 Thermal Radiation Principles. - 5.10 Interpreting Thermal Scanner Imagery. - 5.11 Radiometric Calibration of Thermal Scanners. - 5.12 Temperature Mapping with Thermal Scanner Data. - 5.13 FLIR Systems. - 5.14 Hyperspectral Sensing. - 5.15 Conclusion . - Works Cited. - 6 Earth Resource Satellites Operating in the Optical Spectrum. - 6.1 Introduction. - 6.2 Early History of Space Imaging. - 6.3 Landsat Satellite Program Overview. - 6.4 Landsat-1,-2, and-3. - 6.5 Landsat-4 and -5. - 6.6 Landsat-6 Planned Mission. - 6.7 Landsat-7. - 6.8 Landsat Image Examples. - 6.9 Landsat Data Continuity Mission. - 6.10 Long-Term Future of the Landsat Program and the Global Earth Observation System of Systems. - 6.11 SPOT Satellite Program. - 6.12 SPOT-1,-2, and-3. - 6.13 SPOT-4. - 6.14 SPOT-5. - 6.15 SPOT Image Examples. - 6.16 Other Earth Resource Satellites. - 6.17 Meteorological Satellites Frequently Applied to Earth Surface Feature Observation. - 6.18 Ocean Monitoring Satellites. - 6.19 Earth Observing System. - 6.20 Space Station Remote Sensing . - Works Cited. - 7 Digital Image Interpretation and Analysis. - 7.1 Introduction. - 7.2 Image Rectification and Restoration. - 7.3 Image Enhancement. - 7.4 Contrast Manipulation. - 7.5 Spatial Feature Manipulation. - 7.6 Multi-Image Manipulation. - 7.7 Image Classification. - 7.8 Supervised Classification. - 7.9 The Classification Stage. - 7.10 The Training Stage. - 7.11 Unsupervised Classification. - 7.12 Hybrid Classification. - 7.13 Classification of Mixed Pixels. - 7.14 The Output Stage. - 7.15 Postclassification Smoothing. - 7.16 Object-Oriented Classification. - 7.17 Classification Accuracy Assessment. - 7.18 Data Merging and GIS Integration. - 7.19 Hyperspectral Image Analysis. - 7.20 Biophysical Modeling. - 7.21 Scale Effects. - 7.22 Image Transmission and Compression. - 7.23 Conclusion. - Works Cited. - 8 Microwave and Lidar Sensing. - 8.1 Introduction. - 8.2 Radar Development. - 8.3 Side-Looking Radar System Operation. - 8.4 Synthetic Aperture Radar. - 8.5 Geometric Characteristics of Radar Imagery. - 8.6 Transmission Characteristics of Radar Signals. - 8.7 Other Radar Image Characteristics. - 8.8 Radar Image Interpretation. - 8.9 Interferometric Radar. - 8.10 Radar Remote Sensing from Space. - 8.11 Seasat-1. - 8.12 Shuttle Imaging Radar. - 8.13 Almaz-1. - 8.14 ERS-1 and ERS-2. - 8.15 Envisat. - 8.16 JERS-1. - 8.17 ALOS. - 8.18 Radarsat. - 8.19 High Resolution Spaceborne Radar Systems. - 8.20 Shuttle Radar Topography Mission. - 8.21 Spaceborne Radar System Summary. - 8.22 Passive Microwave Sensing. - 8.23 Lidar. - Works Cited. - Appendix A Radiometric Concepts,Terminology, and Units. - Geometric Characteristics of Radiation Measurement. - Radiometric Terminology and Units. - Appendix B Remote Sensing Data and Information Resources. - Sources of Remote Sensing Data and Information. - Remote Sensing Periodicals. - Remote Sensing Glossaries. - Online Remote Sensing Courses and Tutorials. - Appendix C Sample Coordinate Transformation and Resampling Procedures. - Two-Dimensional Affine Coordinate Transformation. - Resampling Procedures . - Appendix D Radar Signal Concepts, Terminology,and Units. - Signal Power and Radar Cross Section. - Complex Amplitude of Radar Signals. - Index
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  • 45
    Monograph available for loan
    Monograph available for loan
    Cambridge [u.a.] : Cambridge Univ. Press
    Call number: AWI A3-09-0026 ; M 14.0117
    Type of Medium: Monograph available for loan
    Pages: X, 270, [4] S. : Ill., graph. Darst., Kt.
    ISBN: 9780521847995
    Classification:
    Meteorology and Climatology
    Language: English
    Note: Contents: Preface. - Acknowledgements. - 1 The meteorology of monsoons. - 1.1 Introduction. - 1.2 Meteorology of the tropics. - 1.3 The Indian Ocean monsoon system. - 1.4 Theory of monsoons. - 2 Controls on the Asian monsoon over tectonic timescales. - 2.1 Introduction. - 2.2 The influence of Tibet. - 2.3 Oceanic controls on monsoon intensity. - 2.4 Summary. - 3 Monsoon evolution on tectonic timescales. - 3.1 Proxies for monsoon intensity. - 3.2 Monsoon reconstruction by oceanic upwelling. - 3.3 Continental climate records. - 3.4 Eolian dust records. - 3.5 Evolving flora of East Asia. - 3.6 History of Western Pacific Warm Pool and the Monsoon. - 3.7 Summary. - 4 Monsoon evolution on orbital timescales. - 4.1 Introduction. - 4.2 Orbital controls on monsoon strength. - 4.3 Eolian records in North-east Asia. - 4.4 Monsoon records from cave deposits. - 4.5 Monsoon variability recorded in ice caps. - 4.6 Monsoon variability recorded in lacustrine sediments. - 4.7 Salinity records in marine sediments. - 4.8 Pollen records in marine sediments. - 4.9 Paleoproductivity as an indicator of monsoon strength. - 4.10 The Early Holocene monsoon. - 4.11 Mid–Late Holocene monsoon. - 4.12 Summary. - 5 Erosional impact of the Asian monsoon. - 5.1 Monsoon and oceanic strontium. - 5.2 Reconstructing erosion records. - 5.3 Reconstructing exhumation. - 5.4 Estimating marine sediment budgets. - 5.5 Erosion in Indochina. - 5.6 Erosion in other regions. - 5.7 Monsoon rains in Oman. - 5.8 Changes in monsoon-driven erosion on orbital timescales. - 5.9 Tectonic impact of monsoon strengthening. - 5.10 Climatic control over Himalaya exhumation. - 5.11 Summary. - 6 The Late Holocene monsoon and human society. - 6.1 Introduction. - 6.2 Holocene climate change and the Fertile Crescent. - 6.3 Holocene climate change and the Indus Valley. - 6.4 Holocene climate change and early Chinese cultures. - 6.5 Monsoon developments since 1000 AD. - 6.6 Monsoon and religion. - 6.7 Impacts of future monsoon evolution. - 6.8 Summary. - References. - Further reading. - Index.
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  • 46
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/22
    In: CRREL Report, 78-22
    Description / Table of Contents: Special environmental factors that influence the design, laying and maintenance of undersea pipelines and cables in polar waters are described. Various approaches to the protection of submarine pipes and cables are considered, and prime emphasis is given to burial techniques for shallow water. A wide range of methods for trenching and burying are discussed, and technical data are given.
    Type of Medium: Series available for loan
    Pages: v, 36 Seiten , Illustrationen
    Series Statement: CRREL Report 78-22
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors Introduction Types of pipelines and cables Potential hazards to pipelines and cables Areas of concern Waterdepth Sea ice Icebergs and ice islands Submarine permafrost Ice gouging Seabed erosion by water jets Protection methods Protection of unburied pipes and cables Protection by burial Backhoe digging Wireline equipment Plowing and ripping from the surface Plowing and ripping by self-propelled seabed vehicles Bucket ladder dredges Suction dredging Conventional cutterhead dredges Low pressure water jetting Bottom-traveling cutterhead dredges Explosive methods Novel methods Disc saws, wheel ditchers and milling drums Ladder trenchers and chain saws Repetitive impulse devices High pressure water jets Flame jets and plasma torches Electrical discharge and electromagnetic radiation Chemical methods Conclusions Literature cited
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  • 47
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/16
    In: CRREL Report, 78-16
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: vi, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 78-16
    Language: English
    Note: 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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  • 48
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/6
    In: CRREL Report, 78-6
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 78-6
    Language: English
    Note: 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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  • 49
    Monograph available for loan
    Monograph available for loan
    Wageningen : Centre for Agricultural Publ. and Documentation
    Call number: PIK M 370-91-0161 ; MOP 44707 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 175 Seiten , Illustrationen
    Edition: 2., revised and extended edition
    ISBN: 9022006522
    Series Statement: Simulation monographs
    Language: English
    Note: Contents 1 Introduction 1.1 Purpose 1.2 Some terminology 1.3 Electrical analogues 1.4 State determined systems 1.5 Simulation languages 2 Exponential growth 2.1 Analytical and numerical integration 2.2 Simulation 2.3 Time constant and time interval of integration 2.4 Integration method and time interval 3 The growth of yeast 3.1 Description of the system 3.2 Relational diagrams 3.3 Simulation 3.4 Logistic growth 4 Interference of plants 4.1 Replacement series 4.2 Density of sowing 4.3 Simulation of plant interference 4.4 Further modelling aspects 4.4.1 The INDEX and MACRO feature 4.4.2 The INITIAL and DYNAMIC section 5 Growth and competition of Paramecium 5.1 Description of the system 5.2 A simulation program 5.3 Preliminary estimation of parameters 5.4 Final determination of parameters 5.5 Stochastic aspects 5.6 The programming of probability functions 6 Modelling of development, dispersion and diffusion 6.1 Introduction 6.2 Physiological age and development stage 6.3 Demographic models 6.3.1 Age-classes 6.3.2 Errors of approximation 6.3.3 The matrix method 6.4 Germination models 6.4.1 Boxcar train without dispersion 6.4.2 Boxcar train with constant relative dispersion 6.4.3 Boxcar train with controlled dispersion 6.4.4 Refinements 6.5 The flow of heat in soils 7 Growth and development of Helminthosporium maydis 7.1 Introduction 7.2 The weather 7.3 Appearance and growth of lesions 7.4 Sporophore or stalk formation 7.5 Sporulation of green stalks 7.6 Sporulation of dried stalks 7.7 Dispersal of spores 7.8 Germination of spores and penetration of germtubes 7.9 Timing, initialization and output organization 7.10 Results and sensitivity analyses 8 Population models for fruit-tree red spider miteand predatory mites 8.1 Fruit-tree red spider mite 8.2 Predatory mite, Amblyseius potentillae 8.3 Relations between predator and prey 8.4 Preference as a competitive process 8.5 Verification 9 Solutions of the exercises References Appendix A Appendix B Index
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  • 50
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/28
    In: CRREL Report, 77-28
    Description / Table of Contents: Tests were conducted to assess the extent of surface degradation resulting from the application of non-chloride deicing chemicals on three types of airfield pavements. The chemicals tested were proprietary mixtures of urea, formamide, and ethylene glycol; sodium chloride, distilled water, and dry specimens were used as controls and for comparison. Pavements included new and old specimens of open-graded asphaltic concrete and old specimens of dense-graded asphaltic concrete. Portland cement concrete specimens used were new and old, with and without air-entrainment. New and old tar rubber concrete specimens were also tested. Samples were subjected to up to 60 freeze-thaw cycles with deicing chemicals flooding their upper surface. Each specimen was rated on a scale of 0-5 after every five freeze-thaw cycles. All PCC specimens showed some surface degradation, whereas the dense- and open-graded asphaltic concretes were largely unaffected.
    Type of Medium: Series available for loan
    Pages: v, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 77-28
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric (SI) Units of measurement Introduction Test procedure Pavement types Deicing chemicals Description of tests Discussion Literature cited Appendix A: Test results Appendix B: Portland cement concrete materials data
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  • 51
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/8
    In: CRREL Report, 77-8
    Description / Table of Contents: A broadbanded impulse radar system was used for aerial detection of accumulated frazil and brash ice in a 9.5-km reach of the St. Lawrence River near Ogden Island. The remote sensing and data reduction system developed for the project provided data sufficient for production of a contour map having 1-ft intervals. With this contour map, the accumulation pattern of frazil and brash ice could be analyzed. Recommendations are given for improving the performance of the aerial profiling system.
    Type of Medium: Series available for loan
    Pages: iv, 19 Seiten , Illustrationen
    Series Statement: CRREL Report 77-8
    Language: English
    Note: CONTENTS Page Abstract Preface Conversion factors: U.S. customary to metric (SI) units of measurement Background Objectives Profiling system Approach Profiling method Data reduction and interpretation Results Conclusions Recommendations Literature cited Appendix A. Comparison of ground and aerial data
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  • 52
    Call number: ZSP-201-77/9
    In: CRREL Report, 77-9
    Description / Table of Contents: This report presents experimental results on the conditions of initiation of an ice jam by a simple surface obstruction, on the equilibrium thickness of an ice jam formed by accumulation and submergence of ice floes, and on the compression strength of floating, fragmented ice cover. In the study on ice jam initiation, it was found that the minimum concentration of floes in the opening of the obstruction at which a jam occurs is nearly independent of the ratio of width of constricted passage to channel width, and is proportional to a negative power of the ratio of floe length to width of constricted passage. From energy analysis of floe submergence, a relationship relating the thickness of a jam formed by accumulation and submergence of floes to the approach flow characteristics was derived and found to fit satisfactorily the experimental data. In experiments on compression strength of floating, fragmented ice cover it was found that the compressive strength is inversely proportional to compression velocity and independent of cover length.
    Type of Medium: Series available for loan
    Pages: vii, 45 Seiten , Illustrationen
    Series Statement: CRREL Report 77-9
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Introduction I. Initiation of ice jams by partial surface obstructions A. Introductory remarks B. Experimental apparatus and procedure C. Dimensional analysis D. Presentation of results and discussion ΙΙ. Thickness of ice jams due to accumulation and transport of ice floes A. Introductory remarks B. Experimental apparatus and procedures C. Presentation of results E. Conclusion III. Compressive strength of floating fragmented ice covers A. Introductory remarks B. Experimental setup and procedure C. Presentation of results and discussion D. Conclusions Literature cited Appendix A: Experimental results on ice jam initiation Appendix B: Effect of surface tension on submergence velocity of ice floes Appendix C: Experimental results for ice jam thickness study Appendix D: Experimental results on compressive strength of fragmented ice cover
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  • 53
    Call number: AWI A2-08-0041
    Description / Table of Contents: Contents: 1 Introduction. - 1.1 Key aspects of the climate of Antarctica. - 1.1.1 Temperature. - 1.1.2 Atmospheric circulation. - 1.1.3 Precipitation. - 1.1.4 The ice sheet as an climate archive. - 1.1.5 Regional climate models. - 1.2 Antarctica in a changing global climate. - 1.3 Ice sheet mass balance. - 1.3.1 Mass balance estimates from satellite altimetry. - 1.3.2 Mass balance estimates from gravity. - 1.3.3 Mass budget using inSAR. - 1.3.4 Current level of understanding. - 1.4 Surface mass balance. - 1.5 Contents of this thesis. - 2 Characteristics of the Antarctic surface mass balance. - 2.1 Introduction. - 2.2 Model description. - 2.2.1 Snow albedo. - 2.2.2 Surface roughness lengths. - 2.2.3 Snow model. - 2.2.4 Correction of the liquid and solid precipitation. - 2.3 Results. - 2.3.1 Solid precipitation. - 2.3.2 Sublimation. - 2.3.3 Melt. - 2.3.4 Surface mass balance (SMB). - 2.3.5 Seasonality of the mass balance. - 2.3.6 Interannual variability and trends. - 2.4 Discussion. - 2.4.1 Spatial distribution of measured and modeled SMB. - 2.4.2 The integrated SMB. - 2.4.3 Interannual variability and trends. - 2.5 Conclusions. - 3 Reassessment of the Antarctic surface mass balance. - 3.1 Introduction. - 3.2 Model description. - 3.3 Observations and data handling. - 3.3.1 Excluded areas. - 3.3.2 Model interpolation. - 3.3.3 Observationally dense areas. - 3.4 Results. - 3.4.1 RACMO2/ANT compared to V99. - 3.4.2 RACMO2/ANT compared to observations. - 3.4.3 Impact of temporal mismatch. - 3.4.4 Elevation and SMB. - 3.5 Discussion. - 3.5.1 Statistical robustness of the results. - 3.5.2 An evaluation of model performance. - 3.5.3 Towards a better understanding of Antarctic SMB. - 3.6 Conclusions. - 4 Error evaluation of a surface mass balance estimate. - 4.1 Introduction. - 4.2 Method. - 4.2.1 Definition of error margins. - 4.2.2 Verifying error margins. - 4.2.3 Spatial error autocorrelation. - 4.2.4 Error for basin mean SMB. - 4.3 Application. - 4.4 Discussion. - 5 Heat budget of the lower East Antarctic atmosphere. - 5.1 Introduction. - 5.2 Model description. - 5.3 The heat budget. - 5.3.1 Derivation of temperature tendency equation. - 5.3.2 Calculation of individual terms. - 5.4 Model evaluation. - 5.4.1 Temperature and wind. - 5.4.2 Surface energy budget. - 5.5 Results. - 5.5.1 Binning procedure. - 5.5.2 Climatological setting. - 5.5.3 Winter heat budgets. - 5.5.4 Summer heat budgets. - 5.6 Conclusions. - 6 Factors Controlling the Near Surface Temperature in Antarctica. - 6.1 Introduction. - 6.2 Model description and evaluation. - 6.3 Methods. - 6.3.1 Definition of the heat budget. - 6.3.2 Definition of free atmosphere parameters. - 6.3.3 Definition of ABL depth. - 6.3.4 Example of vertical profiles. - 6.4 Results: Winter. - 6.4.1 External heating and surface interactions. - 6.4.2 Heat advection in East Antarctica. - 6.4.3 Spatial distribution of AdvH and AdvV. - 6.4.4 Synoptic and persistent large-scale and ABL contributions to AdvH. - 6.5 Results: Summer. - 6.5.1 External heating and surface interactions. - 6.5.2 Heat advection. - 6.6 Summary and conclusions. - 7 Suggestions for future work. - 7.1 Applications for heat budget analyses. - 7.2 SMB of the Antarctic ice sheet. - 7.3 A pilot study with decreased ice crystal fall speed. - Bibliography. - Samenvatting. - Dankwoord. - Curriculum Vitae. - Publications.
    Type of Medium: Monograph available for loan
    Pages: VII, 138 S. : graph. Darst.
    Language: English
    Note: Utrecht, Univ., Diss., 2008
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  • 54
    Call number: ZSP-403-303
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 303 : Upper Atmosphere Physics 26
    Language: English
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  • 55
    Call number: ZSP-403-302
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 59 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 302 : Upper Atmosphere Physics 25
    Language: English
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  • 56
    Monograph available for loan
    Monograph available for loan
    Bremerhaven : Alfred-Wegener-Institut
    Associated volumes
    Call number: ZSP-994(2006/2007)
    In: Zweijahresbericht / AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung, 2006/2007
    Type of Medium: Monograph available for loan
    Pages: 344 Seiten , Illustrationen
    ISSN: 1618-3703
    Series Statement: Zweijahresbericht / AWI, Alfred-Wegener-Institut für Polar- und Meeresforschung 2006/2007
    Language: German , English
    Note: Inhalt = Content 1. Vorwort = Introduction 2. Ausgewählte Forschungsthemen = Selected research topics Rinnen im Meereis: Heizung für die Atmosphäre? = Leads in Sea Ice: Heating the Atmosphere? / Christof Lüpkes, Vladimir Gryanik, Anna Barbara Herold, Gerit Birnbaum, Ulrike Wacker, Jörg Hartmann Die polaren Ozeane vor dem Hintergrund der Klimaänderung – Ein Vergleich = The Polar Oceans in the context of climate change – commons and contrasts / Eberhard Fahrbach, Christian Haas und Ursula Schauer Wissenschaftliches Rechnen und Ozeanographie für das Krisenmanagement: Der Beitrag des Alfred-Wegener-Instituts zum Deutsch-Indonesischen Tsunami-Frühwarnsystem = Scientific computing and oceanography for hazard management: The contribution of the Alfred Wegener Institute to the German-Indonesian Tsunami Early Warning System / Jörn Behrens, Wolfgang Hiller, Jens Schröter Klimaarchiv Eis – Das European Project for Ice Coring in Antarctica (EPICA) = Climate archive in ice - the European Project for Ice Coring in Antarctica (EPICA) / Hubertus Fischer, Frank Wilhelms, Sepp Kipfstuhl, Hans Oerter, Hanno Meyer, Peter Köhler, Rainer Gersonde & Heinz Miller Schwarzschiefer vom Nordpol entschlüsseln Klimageschichte: Der Arktische Ozean war vor 45 Millionen Jahren so warm wie die Ostsee heute = Black shales near the North Pole decipher climate history: The Arctic Ocean at 45 Ma was as warm as the modern Baltic Sea / Ruediger Stein, Petra Weller, Bettina Boucsein und Jens Matthiessen Leben auf dem Mars? Methan-bildende Mikroorganismen aus sibirischen Permafrost-böden als Studienobjekte = Life on Mars? Methane-forming micro-organisms from Siberian permafrost soils as study objects / Dirk Wagner und Daria Morozova Seeelefanten helfen Südozeanmodellierern = Elephant Seals help validate Finite Element Ice-Ocean Model / Ralph Timmermann Neuigkeiten in der Krillforschung: Licht kontrolliert Lebensfunktionen des Krills = News in Krill research: Light controls life functions of krill / Mathias Teschke, Bettina Meyer, Carsten Pape, Susanne Spahic Wie wird man 400 Jahre alt? Altersvorsorge der Islandmuschel (Arctica islandica) = Living 400 years – what is the secret of the ocean quahog (Arctica islandica)? / Doris Abele, Eva Philipp, Julia Strahl, Thomas Brey Langzeitforschung auf Helgoland und Sylt: Ein Finger am Puls der Nordsee = Long-Term Ecological Research at Helgoland and Sylt: Keeping a Finger at the Pulse of the North Sea / Justus E.E. van Beusekom, Maarten Boersma, Karsten Reise and Karen H. Wiltshire 3. Forschung = Research MARCOPOLI 3.1 MARINE 3.2 COAST 3.3 POLAR 3.4 Neue Themen = Additional funding 4. Helmholtz-Nachwuchsgruppen = Helmholtz Young Investigator Groups 5. Entwicklungen in den Fachbereichen = Progresses in the Scientific Divisions 6. Neue Technologien = New technologies 7. Logistik und Forschungsplattformen = Logistics and research platforms 8. Nationale und internationale Zusammenarbeit = National and international cooperation 9. Mariner Umweltschutz = Marine environmental protection 10. Wissenschaftliches Rechenzentrum = Scientific data processing centre 11. Bibliothek = Library 12. Technologietransfer = Technology transfer 13. Presse- und Öffentlichkeitsarbeit = Public relations department 14. Schulprojekt = School project 15. Personeller Aufbau und Haushaltsentwicklung = Personnel structure and budget trends 16. Veröffentlichungen, Patente = Publications, patents Anhang = Annex , Text in deutscher und englischer Sprache
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  • 57
    Call number: 20-1/M 08.0445
    In: International hydrology series
    Description / Table of Contents: Contens: Preface: H. S. Wheater, S. Sorooshian and K. D. Sharma; 1. Modelling hydrological processes in arid and semi-arid areas - an introduction H. Wheater; 2. Global precipitation estimation from satellite imagery using artificial neural networks S. Sorooshian, K.-L. Hsu, B. Imam and Y. Hong; 3. Modelling semi-arid and arid hydrology and water resources - the southern Africa experience D. A. Hughes; 4. Use of the IHACRES rainfall-runoff model in arid and semi-arid regions B. F. W. Croke and A. J. Jakeman; 5. KINEROS2 and the AGWA modelling framework D. J. Semmens, D. C. Goodrich, C. L. Unkrich, R. E. Smith, D. A. Woolhiser and S. N. Miller; 6. A distributed spatial sediment delivery model for arid regions K. D. Sharma; 7. The Modular Modeling System (MMS): a toolbox for water and environmental resources management G. H. Leavesley, S. L. Markstrom, R. J. Viger and L. E. Hay; 8. Calibration, uncertainty and regional analysis of conceptual rainfall-runoff models H. Wheater, T. Wagener and N. McIntyre; 9. Real-time flow forecasting P. C. Young; 10. Real-time flood forecasting - Indian experience R. D. Singh; 11. Groundwater modeling in hard-rock terrain in semi-arid areas: experience from India S. Ahmed, J.-C. Maréchal, E. Ledoux and G. de Marsily;
    Type of Medium: Monograph available for loan
    Pages: IX, 195 S. , Ill., graph. Darst., Kt.
    ISBN: 0521869188 , 978-0-521-86918-8
    Series Statement: International hydrology series
    Classification:
    Hydrology
    Language: English
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  • 58
    Monograph available for loan
    Monograph available for loan
    Cambridge : Cambridge University Press
    Call number: AWI G8-09-0001
    Type of Medium: Monograph available for loan
    Pages: XV, 240 Seiten , Illustrationen
    Edition: First published
    ISBN: 978-0-521-88966-7 , 0-521-88966-9
    Language: English
    Note: Contents List of contributors Introduction Part I Geophysical methods 1 Electrical methods / C. Kneisel and C. Hauck 1.1 Introduction 1.2 Measurement principles 1.3 Data acquisition 1.4 Data processing 1.5 Periglacial applications and particularities 1.6 Conclusions 1.7 Checklist References 2 Electromagnetic methods / A. Hardt and C. Hauck 2.1 Introduction 2.2 Background 2.3 Periglacial applications and particularities 2.4 Conclusions 2.5 Checklist References 3 Refraction seismics / L. Schrott and T. Hoffmann 3.1 Introduction 3.2 Measurement principles 3.3 Limitations of seismic refraction based on measurement principles 3.4 Data acquisition 3.5 Data processing 3.6 Periglacial applications and particularities 3.7 Checklist References 4 Ground-penetrating radar / I. Berthling and K. Melvold 4.1 Introduction 4.2 Measurement principles 4.3 Data acqusition 4.4 Data processing 4.5 Periglacial applications and particularities 4.6 Recommendations References Part Il Case studies 5 Typology of vertical electrical soundings for permafrost/ground ice investigation in the forefields of small alpine glaciers / R. Delaloye and C. Lambiel 5.1 Introduction 5.2 Method 5.3 Typology 5.4 Conclusions References 6 ERT imaging for frozen ground detection / M. Ishikawa 6.1 Introduction 6.2 Data acquisition and quality control 6.3 Case studies 6.4 Summary References 7 Electrical resistivity values of frozen soil from YES and TEM field observations and laboratory experiments / K. Harada 7.1 Introduction 7.2 Methods 7.3 Results 7.4 Summary References 8 Results of geophysical surveys on Kasprowy Wierch, the Tatra Mountains, Poland / W. Dobinski, B. Zogala, K. Wzietek and L. Litwin 8.1 Introduction 8.2 Field site 8.3 Methods 8.4 Measurements 8.5 Analysis and interpretation of the measurements 8.6 Conclusions References 9 Reassessment of DC resistivity in rock glaciers by comparing with P-wave velocity: a case study in the Swiss Alps / A. Ikeda 9.1 Introduction 9.2 Methods 9.3 Field sites with borehole information 9.4 Results 9.5 Discussion 9.6 Conclusions References 10 Quantifying the ice content in low-altitude scree slopes using geophysical methods / C. Hauck and C. Kneisel 10.1 Introduction 10.2 Methods 10.3 Field sites 10.4 Results 10.5 Discussion and conclusions References 11 The use of GPR in determining talus thickness and talus structure / O. Sass 11.1 Introduction 11.2 Study sites and data acquisition 11.3 Results 11.4 Conclusions References 12 GPR soundings of rock glaciers on Svalbard / I. Berthling, B. Etzelmüller, H. Farbrot, K. Isaksen, M. Wåle and R. Ødegård 12.1 Introduction 12.2 Methods 12.3 Results and interpretation 12.4 Discussion References 13 Arctic glaciers and ground-penetrating radar. Case study: Stagnation Glacier, Bylot Island, Canada / T. Irvine-Fynn and B. Moorman 13.1 Introduction 13.2 Field site 13.3 Field methods 13.4 Processing methods 13.5 Results 13.6 Discussion 13.7 Conclusions References 14 Mapping of subglacial topography using GPR for determining subglacial hydraulic conditions / K. Melvold and T. V. Schuler 14.1 Introduction 14.2 Field site 14.3 Methodology 14.4 Results 14.5 Discussion 14.6 Conclusions References 15 Snow measurements using GPR: example from Amundsenisen, Svalbard / K. Melvold 15.1 Introduction 15.2 GPR and GPS equipment and measurements 15:3 Data processing 15.4 Results and discussion 15.5 Conclusions References 16 Mapping frazil ice conditions in rivers using ground penetrating radar / I. Berthling, H. Benjaminsen and A. Kvambekk 16J Introduction 16.2 Setting and field procedures 16.3 Results 16.4 Discussion 16.5 Conclusions References Contents Appendix Tables of geophysical parameters for periglacial environments Index
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  • 59
    Call number: ZSP-403-306
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 26 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 306 : Marine Biology 38
    Language: English
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  • 60
    Call number: ZSP-405a-08-0049
    In: JAXA Research and Development Report
    Type of Medium: Series available for loan
    Pages: 9 S. : graph. Darst.
    Series Statement: JAXA Research and development report RR-07-015E
    Language: English
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  • 61
    Call number: ZSP-405a-08-0048
    In: JAXA Research and Development Report
    Type of Medium: Series available for loan
    Pages: 13 S. : graph. Darst.
    Series Statement: JAXA Research and development report RR-07-014E
    Language: English
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  • 62
    Call number: 5/M 08.0358
    In: Modern approaches in solid earth sciences
    Description / Table of Contents: Modern seismology has faced new challenges in the study of earthquakes and their physical characteristics. This volume is dedicated to the use of new approaches and presents a state of the art in historical seismology. Selected historical and recent earthquakes are chosen to document and constrain related seismic parameters using updated methodologies in the macroseismic analysis, field observations of damage distribution and tectonic effects, and modelling of seismic waveforms. A critical re-evaluation of historical accounts and early seismograms provides us with the basis for a realistic seismic hazard assessment.- A glimpse into the seismicity of the Ionian Islands between 1658 and 1664.- The earthquake of April 4, 1640 in the Lower Rhine Embayment.- The Value of Descriptive Earthquake Catalogues of the Eastern Mediterranean Region and the Middle East.- Sources of the 1692 and 1907 earthquakes in Jamaica.- Quantitative analysis of early seismograph recordings.- The Late 17th century earthquakes in Northwest Africa: how many (if any)?.- Richter magnitude evaluation: from historical macroseismic data to seismic waveform modelling.- In troubled times, in a divided country: the Upper Tiber Valley earthquake of 1789.- Can we improve the knowledge of historical seismicity of France, and elsewhere?.- The seismicity of Central Alps: seismological and archaeological traces, geological evidence and open problems.- The 1855 Visp (Switzerland) Earthquake: A Milestone in Macroseismic Methodology?.- Large Historical Earthquakes in Eastern/Central North America: Fact and Fiction.- Benson Making Seismograms Accessible from Historical Seismogram Filming to the Online SeismoArchives.- Attenuation of intensity for the Zemmouri earthquake of May 2003 (Mw 6.8): Insights for the seismic hazard assessment in northern Algeria.- Earthquake Fault Ruptures and Historical Seismology : A decisive step for a better constraint of the active deformation.- The case for large (M〉7) earthquakes felt in the UK in historical times.- Earthquake effects on nature and macroseismic intensity scales.- Interpretation of the 1755 Lisbon earthquake based on the historical observations of different physical phenomena.- Review of historical earthquakes in the lower middle age: earthquakes of the XIV and XV centuries in Catalonia (NE Spain).- What is the lowest magnitude threshold at which an earthquake can be felt or heard, or objects thrown into the air?
    Type of Medium: Monograph available for loan
    Pages: xviii, 443 Seiten , 110 schwarz-weiß-Illustrationen
    Edition: 1. edition
    ISBN: 9781402082214 , 1-402-08221-5
    Series Statement: Modern approaches in solid earth sciences 2
    Language: English
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  • 63
    Call number: ZSP-553-178,3
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 77 S., 1 Taf. : Ill., graph. Darst., Kt.
    Series Statement: Meddelelser om Grønland 178,3
    Language: English
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  • 64
    Monograph available for loan
    Monograph available for loan
    København : Reitzel
    Associated volumes
    Call number: ZSP-553-184,1
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 99 S. : Ill.
    Series Statement: Meddelelser om Grønland 184,1
    Language: English
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  • 65
    facet.materialart.12
    facet.materialart.12
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-574
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (110 S.)
    Series Statement: Berichte zur Polar- und Meeresforschung 574
    Language: English
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  • 66
    Call number: ZSP-168-573
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource.
    Series Statement: Berichte zur Polar- und Meeresforschung 573
    Language: English
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  • 67
    facet.materialart.12
    facet.materialart.12
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-580
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (175 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 580
    Language: English
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  • 68
    facet.materialart.12
    facet.materialart.12
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-581
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (S. 35).
    Series Statement: Berichte zur Polar- und Meeresforschung 581
    Language: English
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  • 69
    Call number: ZSP-168-584
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: Series available for loan
    Pages: 265 S. : Ill., graph. Darst.
    ISSN: 1866-3192
    Series Statement: Berichte zur Polar- und Meeresforschung 584
    Language: English
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  • 70
    Monograph available for loan
    Monograph available for loan
    Turku : Turun Yliopisto
    Call number: AWI P5-79-0002
    Type of Medium: Monograph available for loan
    Pages: 75 S.
    ISBN: 9516415903
    Language: English
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  • 71
    Call number: AWI S1-09-0042
    In: Texts in applied mathematics
    Type of Medium: Monograph available for loan
    Pages: XIV, 500 S. : zahlr. graph. Darst.
    ISBN: 9780387720654
    Series Statement: Texts in applied mathematics 54
    Language: English
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  • 72
    Call number: ZSP-201-78/23
    In: CRREL Report, 78-23
    Type of Medium: Series available for loan
    Pages: vi, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 78-23
    Language: English
    Note: 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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  • 73
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/21
    In: CRREL Report, 78-21
    Description / Table of Contents: 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
    Type of Medium: Series available for loan
    Pages: v, 48 Seiten , Illustrationen , 1 Karte
    Series Statement: CRREL Report 78-21
    Language: English
    Note: 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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  • 74
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/18
    In: CRREL Report, 78-18
    Description / Table of Contents: The primary objective of this project was to demonstrate the utility of remote sensing techniques as an operational tool in the acquisition of data required by the U.S. Army Corps of Engineers, Seattle District, in the Grays Harbor dredging effects project, and related projects. Aerial imagery was used to map surface circulation and suspended sediment patterns near the hopper dredge pump site at the harbor entrance and near pulpmill outfalls in Aberdeen, and to map the areal distribution and extent of intertidal habitats. The surface circulation maps prepared from the aerial photographs and thermal imagery compared favorably with the large-scale circulation patterns observed in the Grays Harbor hydraulic model at the U.S. Army Engineer Waterways Experiment Station. Of the imagery provided by NASA, the thermal imagery was more useful than the color or color infrared (CIR) photographs for mapping circula­tion, while the CIR photographs were more useful than the thermal imagery or the color photographs for mapping intertidal habitats. Current velocities estimated from dye dispersion patterns and drifting dye drogues were comparable at some locations to velocities measured by in situ current meters and in the hydraulic model. Based on a cursory evaluation of LANDSAT-1 imagery acquired in January, February, and October 1973, it had limited utility in providing data on surface circulation patterns in Grays Harbor. The areal distribution and extent of nine wetland vegetation types, dune vegetation, and three types of eelgrass were mapped using primarily aerial C IR photographs and ground sur­veys. Color photographs were also used for areas not covered by the C IR photographs. Wetland vegetation types mapped were: low silty marsh, low sandy marsh, sedge marsh, high immature marsh, high mature marsh, salt marsh, diked pasture, freshwater marsh, and wooded swamp. Undiked salt marsh (first five types) covered 5540 acres (22.3 km2) in Grays Harbor.
    Type of Medium: Series available for loan
    Pages: vi, 85 Seiten , Illustrationen
    Series Statement: CRREL Report 78-18
    Language: English
    Note: CONTENTS Abstract Preface Introduction Site description Background and objectives Project history Approach General Aircraft imagery and sensor data LANDSAT imagery Ground truth data Results and discussion Remote sensing techniques Conventional techniques Comparison of results Conclusions Advantages and disadvantages Applications Recommendations Literature cited
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  • 75
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/15
    In: CRREL Report, 78-15
    Description / Table of Contents: This report first discusses the general approach for calculating the horizontal forces an ice cover exerts on a structure. Ice force determination consists of two parts: (1) the analysis of the in-plane forces assuming that the ice cover remains intact and (2) the use of a failure criterion, since an ice force cannot be larger than the force capable of breaking up the ice cover. For an estimate of the largest ice force, an elastic plate analysis and a failure criterion are often sufficient. A review of the literature revealed that, in the majority of the analyses, it is assumed that the failure load is directly related to a 'crushing strength' of the ice cover. However, observations in the field and tests in the laboratory show that in some instances the ice cover fails by buckling. This report reviews the ice force analyses based on the buckling failure mechanism and points out their shortcomings. The report then presents a new method of analysis which is based on the buckling mechanism
    Type of Medium: Series available for loan
    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 78-15
    Language: English
    Note: CONTENTS Abstract Preface Introduction and statement of problem Review of relevant analyses and tests Determination of the largest ice force on an isolated structure Preliminary remarks The buckling analysis of a floating wedge Proposed method to determine Literature cited
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  • 76
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/14
    In: CRREL Report, 78-14
    Description / Table of Contents: The analytical solution and the numerical study of the eigenvalue problem for determining the buckling pressure of an infinite elastic plate floating on water and stressed uniformly along the periphery of an internal hole is presented. The boundary conditions considered are the clamped-, simple-, and free-edge conditions. Small buckling pressure occurs only for the free-edge condition. The shape of the deflection for the free-edge condition suggests that buckling is an important mechanism of failure.
    Type of Medium: Series available for loan
    Pages: v, 55 Seiten , Illustrationen
    Series Statement: CRREL Report 78-14
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction 1. The problem 2. Abstract of the result Part I. Fundamental solutions 3. Fuchsian type solutions 4. Contour integral solution 5. Integration of the integral solution 6. Fundamental solutions for α = 1 7. Fundamental solutions for α = 0 8. Eigenvalues for α = 0 9. Fundamental solutions for α 〉 1 Part II. Asymptotic expansions 10. Asymptotic expansion for 0 〈 α ⩽1 11. Asymptotic expansion for 1 ≦ α ≦ 2 12. Asymptotic expansion for 2 ≦ α ≦ ∞ Part III. Eigenvalues 13. Range of eigenvalues 14. Eigenvalues for the free-edge condition 15. Eigenvalues for the clamped-edge and simple-edge conditions 16. Deflection Acknowledgement Literature cited Appendix A. Analytical continuation at the singular point Appendix B. Tensorial transformations Appendix C. Comparison of the semi-infinite plate buckling with the asymptotic buckling
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  • 77
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/13
    In: CRREL Report, 78-13
    Description / Table of Contents: Field observations of the growth fabrics of the fast and near-fast ice along the coasts of the Beaufort and Chukchi Seas show that, at depths of more than 60 cm below the upper ice surface, the sea ice crystals show striking alignments within the horizontal plane. At one site this alignment was well developed at a depth of 15 cm and in all cases the degree of preferred orientation increased with depth, with the strongest orientations occurring at the bottom of the ice sheet. In general the c-axes of the crystals were aligned roughly E-W parallel to the coast. In the vicinity of islands the alignment roughly paralleled the outlines of the islands and in narrow passes between islands the alignment paralleled the channel. Our observations, as well as similar observations made in the Kara Sea by Cherepanov, can be explained if it is assumed that the c-axes of the crystals are aligned parallel to the 'long-term' current direction at the sea ice/sea water interface. The alignments are believed to be the result of geometric selection among the growing crystals, with the most favored orientation being that in which the current flows normal to the (0001) plates of ice that make up the dendritic ice/water interface characteristics of sea ice. It is hypothesized that current flow in this direction reduces the thickness of the solute boundary layer as well as the salinity in the liquid at the interface. This lowered salinity allows crystals in the favored orientation to extend farther into the melt than neighboring crystals with less favored orientations. In addition the current tends to induce a continuous flux of supercooled seawater against the sides of the crystals that extend ahead of the interface.
    Type of Medium: Series available for loan
    Pages: v, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 78-13
    Language: English
    Note: CONTENTS Abstract Preface Introduction Locale and techniques Observations Vertical variations in crystal orientation Regional variations in crystal orientation Summary of observations Causes Initial ice skim Earth’s magnetic field Currents Conclusions and consequences Literature cited
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  • 78
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/26
    In: CRREL Report, 78-26
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 27 Seiten , Illustrationen
    Series Statement: CRREL Report 78-26
    Language: English
    Note: 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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  • 79
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/24
    In: CRREL Report, 78-24
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 78-24
    Language: English
    Note: CONTENTS Abstract Preface Introduction Comparison of winters Ship effects Measured forces Sequential breaking of the structure Discussion Conclusions Recommendations Literature cited Appendix A. Force level fluctuations in west ice boom, 20 January 1977
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  • 80
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/25
    In: CRREL Report, 78-25
    Description / Table of Contents: The objectives of this investigation were to describe channel characteristics and geographic settings of ice jam sites from aerial photographic interpretation, to indicate which characteristics may be important in causing ice jams, and to suggest additional uses of aerial photographs. Aerial photographs were taken of 19 sites with a Zeiss RMK 15/23 aerial camera on 17, 19, and 21 April 1976. Uncontrolled photomosaics of each site were assembled and major river characteristics were delineated on the photomosaics. Characteristics described include: manmade structures, falls, rapids, changes in channel depths, channel islands, mid-channel shoals or bars, river bed material, river sinuosity, meanders, floodplain width, riparian vegetation, and types of development on the floodplain. River channel widths were measured from the photographs along rivers where ground truth data were available for comparison. Lengths of channel riffles and pools were measured along the rivers where variations in river depths were evident on the photographs. Seventy-nine percent of the sites have some form of flow control structure which causes a pool with a backwater condition of low velocity. The low flow condition in the pool allows a solid ice cover to form which impedes ice movement and initiates ice jams. Aerial photographs provide a regional perspective for evaluating channel characteristics at an ice jam site and for analyzing the geographic setting at each site during ice-free conditions. Photographs taken after ice jams have formed are useful in monitoring ice jam formation, in analyzing ice characteristics, and in documenting ice jam breakup and movement.
    Type of Medium: Series available for loan
    Pages: iii, 60 Seiten , Illustrationen
    Series Statement: CRREL Report 78-25
    Language: English
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  • 81
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-78/10
    In: CRREL Report, 78-10
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: vi, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 78-10
    Language: English
    Note: 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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  • 82
    Call number: ZSP-201-78/12
    In: CRREL Report, 78-12
    Description / Table of Contents: Road test sections of membrane-enveloped silt and clay soils overlain with asphalt cement concrete were subjected to repetitive dynamic plate-bearing loadings to determine their strength variations during freeze-thaw cycles. The recoverable surface deformations in the load deflection bowl were continuously measured during the loading cycles and analyzed using the Chevron layered elastic computer program to obtain the in situ resilient deformation modulus of the various section layers at different stages of the freeze-thaw cycles. The resilient stiffness of the pavement system (the total load per unit of resilient load plate deflection) was also calculated for the various freeze-thaw conditions. The modulus values of the asphalt cement concrete varied inversely with its temperature by an order of magnetide (90,000 psi to 1,300,000 psi). The resilient stiffness of the pavement system varied in the same manner by nearly a factor of eight (228.4 kips/in. to 1740.2 kips/in.). Despite the wide strength variations of the sections during freeze-thaw cycles, membrane-enveloped fine-grained soils can be utilized instead of granular materials as base and subbase layers in flexible pavements in cold regions where moisture migration is a major concern. Moisture migration did not occur at saturation levels up to 75%, thus there was no strength loss during thawing.
    Type of Medium: Series available for loan
    Pages: v, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 78-12
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S.customary to metric units of measurement Introduction Freeze-thaw system Construction materials Controlled environment test section Outdoor sections Temperature monitoring instrumentation Repetitive plate bearing test apparatus Test results and analyses Conclusions Literature cited
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  • 83
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/31
    In: CRREL Report, 77-31
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 29 Seiten , Illustrationen
    Series Statement: CRREL Report 77-31
    Language: English
    Note: 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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  • 84
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/29
    In: CRREL Report, 77-29
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iii, 8 Seiten , Illustrationen
    Series Statement: CRREL Report 77-29
    Language: English
    Note: CONTENTS Abstract Preface Introduction Sampling and analytical procedures Results Discussion Conclusions Literature cited
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  • 85
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/27
    In: CRREL Report, 77-27
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: v, 19 Seiten , Illustrationen
    Series Statement: CRREL Report 77-27
    Language: English
    Note: 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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  • 86
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/26
    In: CRREL Report, 77-26
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: viii, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 77-26
    Language: English
    Note: 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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  • 87
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/25
    In: CRREL Report, 77-25
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 77-25
    Language: English
    Note: 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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  • 88
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/10
    In: CRREL Report, 77-10
    Description / Table of Contents: 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.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 77-10
    Language: English
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  • 89
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-77/14
    In: CRREL Report, 77-14
    Description / Table of Contents: The breakup of the Chena River was observed and documented during the spring of 1975 and 1976. This study attempted to determine the potential for damage to the proposed Chena River flood control dam from ice and debris during breakup. Results of this study were compared to those of a 1974 companion study. In 1975, ice thickness were determined to be 15% thinner than in 1974 and ice volume was 33% smaller. No major ice floes were observed in 1975 and no significant flooding occurred, although the approaches to a bridge at the damsite were eroded by debris and high water immediately after breakup. The 1976 breakup was milder than that of 1975. Minor flooding in the lower river was caused by jamming of a few large ice pieces, but no property damage resulted.
    Type of Medium: Series available for loan
    Pages: v, 44 Seiten , Illustrationen
    Series Statement: CRREL Report 77-14
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Ice thickness and quantity Chronology of the 1975 Chena River breakup Checkpoint 3 Checkpoint 4 Checkpoint 5 Checkpoint 6 Checkpoint A Checkpoint 7 Checkpoint C Checkpoint D Checkpoint 8 Checkpoint 10 Checkpoint 11 Checkpoint 12 Spring flooding and debris The 1976 Chena River breakup Breakup in other years Summary and conclusions Appendix A. Sequential photographs of 1975 breakup at checkpoints 3-12
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  • 90
    Call number: ZSP-403-304
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 52 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 304 : Oceanography 31
    Language: English
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  • 91
    Call number: ZSP-403-307
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 16 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 307 : Glaciology 33
    Language: English
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  • 92
    Call number: ZSP-403-308
    In: Jare Data Reports
    Type of Medium: Series available for loan
    Pages: 22 S. : überw. graph. Darst.
    Series Statement: Jare Data Reports 308 : Glaciology 34
    Language: English
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  • 93
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    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-575
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (37 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 575
    Language: English
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  • 94
    facet.materialart.12
    facet.materialart.12
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-579
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (271 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 579
    Language: English
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  • 95
    Call number: ZSP-168-578
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (158 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 578
    Language: English
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  • 96
    Call number: ZSP-168-577
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (132 S.).
    Series Statement: Berichte zur Polar- und Meeresforschung 577
    Language: English
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  • 97
    Call number: ZSP-168-571
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: Series available for loan
    Pages: 411 S. : graph. Darst.
    Series Statement: Berichte zur Polar- und Meeresforschung 571
    Language: English
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  • 98
    Call number: ZSP-168-570
    In: Berichte zur Polar- und Meeresforschung
    Type of Medium: 12
    Pages: Online-Ressource (145 S.)
    Series Statement: Berichte zur Polar- und Meeresforschung 570
    Language: English
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  • 99
    Series available for loan
    Series available for loan
    Warszawa : Panstw. Wyd. Naukowe
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    Call number: SR 91.0236(C-4) / Regal 35
    In: Publications of the Institute of Geophysics, Polish Academy of Sciences
    Type of Medium: Series available for loan
    Pages: 90 S.
    Series Statement: Publications of the Institute of Geophysics, Polish Academy of Sciences : C, Geomagnetism 4 = 114
    Language: English
    Location: Magazine - must be ordered
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  • 100
    Series available for loan
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    Warszawa : Panstw. Wyd. Naukowe
    Associated volumes
    Call number: SR 91.0236(C-3) / Regal 35
    In: Publications of the Institute of Geophysics, Polish Academy of Sciences
    Type of Medium: Series available for loan
    Pages: 69 S.
    Series Statement: Publications of the Institute of Geophysics, Polish Academy of Sciences : C, Geomagnetism 3 = 111
    Language: English
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