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  • 1
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/1
    In: CRREL Report, 76-1
    Description / Table of Contents: This report summarizes the advances in understanding of the Arctic which have come about since the inception of the ARPA Arctic Surface Effect Vehicle Program in 1970, primarily as the result of CRREL’s participation. Major efforts to increase knowledge of sea ice, terrestrial, and coastal topographic features are described. Special empha­sis is placed upon the quantitative understanding of pressure ridging. Other areas of major interest are atmospheric characteristics and ecological effects. A list of publications generated is included.
    Type of Medium: Series available for loan
    Pages: iv, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 76-1
    Language: English
    Note: CONTENTS Abstract Preface Introduction Sea ice characteristics Ridging intensity Arctic terrain characteristics databank Digital terrain maps Digital laser profiles Standard terrain tapes Mobility analysis Terrestrial and coastal characteristics Northern Alaska Interior Alaska Arctic USSR Northern Canada and Greenland Climatological characteristics General features Surface winds Temperatures Precipitation and visibility Electromagnetic/optical propagation Ecological effects of SEV operations SK-5 tests Simulated SEV tests Conclusions Literature cited Additional CRREL SEV Bibliography
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  • 2
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/3
    In: CRREL Report, 76-3
    Description / Table of Contents: A world-wide review of the literature applicable to the design of harbors and channels in cold regions was conducted. Forces due to ice movement present the dominant factor in the design of marine structures in cold regions. Expressions for calculating the ice force are presented. Other factors relating to design criteria such as construction materials, structure geometry, and methods of ice suppression are discussed.
    Type of Medium: Series available for loan
    Pages: iii, 32 Seiten
    Series Statement: CRREL Report 76-3
    Language: English
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  • 3
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/2
    In: CRREL Report, 76-2
    Description / Table of Contents: The repair and maintenance costs of low slope roofs are high and their life expectancy is less than desired. The increasing use of insulation is accompanied by a greater incidence of problems. The experience in cold regions amplifies these experiences. Protected membrane roofs have the prerequisites for better performance and the experience to date is encouraging. The results of performance measurements of three roofs built by the Corps of Engineers verify that the membrane remains at nearly constant temperature, independent of the weather, and that the insulation retains its integrity despite periodic wetting. Moisture absorption is slow and appears to stabilize in time due to the self-drying nature of the roof. Heat losses are increased due to rain, and extra insulation should be added to compensate for these losses. The resistance of protected membrane roofs to fire, traffic, impact, and other adverse forces is superior. So far, the initial cost of protected membrane roofs is at a premium, primarily due to the cost of concrete pavers. The initial cost premium can be justified, however, by the reduced repair and maintenance costs as indicated to date, and by the longer life expectancy of the protected membrane. The high probability of superior performance and cost effectiveness is a compelling reason to incorporate protected membrane roofs increasingly in Government construction.
    Type of Medium: Series available for loan
    Pages: v, 27 Seiten , Illustrationen
    Series Statement: CRREL Report 76-2
    Language: English
    Note: CONTENTS Page Abstract Preface Introduction Low slope roof problems and repair costs Protected membrane roofs and materials Installations of protected membrane roofs Performance evaluation Test program Effectiveness Thermal efficiency Heat balance Internal cooling due to rain Moisture absorption and thermal conductivity of insulations Durability and life expectancy Fire resistance Patent considerations Costs of roofs Design considerations Proposed specifications Conclusions and recommendations Literature cited
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  • 4
    Call number: ZSP-201-76/8
    In: CRREL Report, 76-8
    Description / Table of Contents: During the past decade a number of methods for measuring the amount of unfrozen water in partially frozen ground have emerged. Means of quickly and simply predicting unfrozen water contents in clay have become increasingly important with the growth of interest in encapsulating clay soils compacted at low water contents to serve as base courses for roads. Unfortunately the measurements require sophisticated equipment and, in most instances, specially trained operators. In an effort to simplify the task of obtaining water-ice phase composition data, methods of calculating phase composition curves from other, simpler measurements on soils have been sought. The paper presents a method of deriving the measurement of unfrozen water contents at various temperatures from liquid limit determinations.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-8
    Language: English
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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-201-76/7
    In: CRREL Report, 76-7
    Description / Table of Contents: This report covers a series of cantilever beam tests designed to determined the efficacy of adding reinforcement to an ice cover. Tests were run using 1-in.-diam tree branches, 3/16-in.-diam wire rope and 9/16-in. half-round wood dowels as reinforcement for both seawater and freshwater ice. The results show a definite advantage derived from using reinforcement, even when poorly placed. The results also show that reinforced ice carries a load even after it cracks. Thus, after the initial cracks there is time to remove people and equipment before final breakthrough. One must bear in mind, however, that reinforcement has disadvantages. The darker reinforcement absorbs solar radiation and thereby causes earlier weakening of the ice cover. Also, in many cases the time and effort required to place reinforcement may exceed those required to achieve equal strength by additional thickening of the ice sheet. This study has shown that understanding of the failure mechanism of ice under repetitive loading is poor and that future studies should be performed on this problem. Also, this study covered only cantilever beams. The actual field problem is strengthening a three-dimensional sheet. Hence, distribution and orientation of the reinforcement should be addressed in future studies.
    Type of Medium: Series available for loan
    Pages: v, 12 Seiten , Illustrationen
    Series Statement: CRREL Report 76-7
    Language: English
    Note: Contents Abstract Preface Summary Conversion factors: U.S. customary to SI metric units Introduction Typical methods of constructing ice bridges Current knowledge Test program Objectives Equipment Procedure Data General Specific ice sheets Test results Conclusions Recommendations Literature cited
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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-201-76/10
    In: CRREL Report, 76-10
    Type of Medium: Series available for loan
    Pages: vi, 25 Seiten , Illustrationen
    Series Statement: CRREL Report 76-10
    Language: English
    Note: CONTENTS Introduction Experimental work SCR samples CAG samples CMS samples UAG samples SI samples Optical system Equipment Procedure Photographic work Large cracks and fissures Small damage to the surface Small damage to the buIk Results Damage as a function of the position x of the focal point; n(x) Damage as a function of the number of irradiations #; n(#) Damage as a function of crystallographic orientation ĉ; n (ĉ); p (ĉ) Damage as a function of surface structure Damage as a function of age A; n (A) Damage as a function of wavelength λ; p(λ) Systematic study of damage as a function of W, t, m and s; n(W, t, m, s) Analysis Fracture in ice Mechanisms for optically generated damage in transparent dielectrics Discussion of the results Summary and conclusions Literature cited
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  • 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-201-76/14
    In: CRREL Report, 76-14
    Description / Table of Contents: At the height of warm weather in Alaska in 1975, temperature measurements were made to determine the extent of the thermal impact on French Creek due to a condenser cooling water impact from the Eielson AFB Power plant. Water temperature measurements during a two-day period failed to show any significant thermal impact on the water in French Creek. It was concluded that no thermal pollution exists due to this warm water input at the volumes and conditions that presently exist.
    Type of Medium: Series available for loan
    Pages: ii, 5 Seiten , Illustrationen
    Series Statement: CRREL Report 76-14
    Language: English
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  • 8
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/15
    In: CRREL Report, 76-15
    Description / Table of Contents: A literature review of revegetation and biological aspects of restoration research was completed for arctic and sub­arctic North America. Although there is a great deal of climatic variation in this region it is generally characterized by extreme conditions, such as a short growing season and permafrost. Most of the revegetation research has been undertaken in the last six years as a result of increased natural resource development. The primary goal has been erosion control, with aesthetics, minimization of thermokarst, and production of browse as other objectives. Revege­tation and long-term restoration methods depend upon such variables as the site conditions, nutrient regime (especially as this is influenced by the climatic conditions in the Arctic and Subarctic), plant adaptations, and the selection of native or introduced species. Technologies which have been developed to meet these conditions primarily include seedbed preparation, use of seed mixes, and fertilization and seeding methods. Most of the research has focused on the use of agronomic grasses and legumes. These are selected on the basis of a number of factors, such as cold hardiness and growth form prior to evaluation in the laboratory and the field. The most successful species to date have been Arctared fescue and Nugget bluegrass in the Arctic, while these two as well as creeping red fescue, meadow foxtail, Frontier reed canarygrass, Durar hard fescue, slender wheatgrass, and Icelandic poa did well in the Subarctic. Similar methods have been attempted to a more limited extent with evaluation of native herbaceous and woody species which seem promising on the basis of natural succession studies. There are a number of continuing research needs for arctic anc subarctic revegetation. These include fertilization strategies, development of specialized techniques (such as sprigging) for native species, and longer term studies. It is particularly important to integrate short term revegetatio methods with long-term restoration goals.
    Type of Medium: Series available for loan
    Pages: iv, 32 Seiten , Illustrationen
    Series Statement: CRREL Report 76-15
    Language: English
    Note: CONTENTS Page Abstract Preface Introduction Definition of revegetation Definition of restoration Objectives Some revegetation considerations Site conditions Nutrient regime Plant adaptations Native species vs introduced species Methods Seedbed preparation Seeding methods Timing of seeding Seed mixes Fertilization Agronomic grasses and legumes Selection criteria Laboratory evaluation Field evaluation Effect of revegetation methods Site conditions Maintenance of herbaceous cover Introduced woody species Native species — succession Significance of disturbance Primary succession Secondary succession Herbaceous native species Selection Laboratory evaluation Field evaluation Effect of revegetation methods Woody native species Selection Laboratory evaluation Field evaluation Native species and agronomic species, in combination Recommendations for research Summary Bibliography Appendix: Species tested
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  • 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-201-76/21
    In: CRREL Report, 76-21
    Description / Table of Contents: The effects of snow temperature and initial density on the stress vs density and stress vs deformation relationships were investigated for shallow compacted snow in the density range of 0.28 to 0.76 g/cu m, for stress range of 0.5 to 72 bars and a temperature range of -1 to -34 C at a deformation rate of 40 cm/s. A decrease in temperature increases the resistance to stress, the effect increasing with applied stress. For any stress, an increase in the initial density results in an increase in the resulting density, the effect decreasing with an increase in stress. The approximate yield envelopes, which define the stress required to initiate any deformation of snow of a particular density and temperature, were determined. Rapid compaction of snow results in extensive recrystallization, significantly different from that of naturally compacted snow. At a stress of 72 bars, transformation to ice occurs only at temperature above -10C.
    Type of Medium: Series available for loan
    Pages: vi, 47 Seiten , Illustrationen
    Series Statement: CRREL Report 76-21
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Description of study Sample preparation Test equipment and procedure Discussion of results Stress-density relationship Stress-deformation relationship Summary and conclusions Microstructural examination of artifically compacted snow Analytical techniques Results and discussion Conclusions Literature cited Appendix: Photographs of oscilloscope traces
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  • 10
    Call number: ZSP-201-76/18
    In: CRREL Report, 76-18
    Description / Table of Contents: Three surface elevation and ice thickness profiles obtained during the 1972 Arctic Ice Dynamics Joint Experiment on a multiyear ice floe were analyzed to obtain relationships between surface elevation, thickness and physical properties of the ice. It was found that for ice freeboards from 0.10 m to 1.05 m above sea level a linear relationship between ice density and freeboard could be postulated. The equation for the regression line is: Ice density = -194f' + 974 kg/cu m where f' is the ice freeboard plus snow depth in ice equivalent at the point in question. This statistical relationship is consistent with observed physical properties, which indicate that as the ice freeboard increases, ice salinity decreases and the higher freeboard or thicker ice therefore decreases in density. Using this variable density with freeboard relationship, a model was constructed to predict ice thickness, given ice freeboard and snow depth alone. This prediction is desirable, since snow depth and freeboard are relatively easy to obtain, whereas ice thickness can usually be obtained only by drilling through the ice. The model was compared with two other models. It was found that the variable density prediction model gave the best approximation to observed ice thickness, with a standard error between the measured and predicted value of about 0.4 m, compared with errors from 50 to 100% higher for the other two models.
    Type of Medium: Series available for loan
    Pages: v, 25 Seiten , Illustrationen
    Series Statement: CRREL Report 76-18
    Language: English
    Note: Contents Abstract Preface Summary Introduction Previous work Results Models for predicting thickness from ice freeboard Comparison between measured and predicted thicknesses Spectral behavior of measured and predicted profiles Comparisons of ice thickness using airborne laser profilometry Conclusions Literature cited Appendix A: Misgivings on isostatic imbalance as a mechanism for sea ice cracking
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  • 11
    Call number: ZSP-553-197,4
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 25 S.
    ISBN: 8717022185
    Series Statement: Meddelelser om Grønland 197,4
    Language: English
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  • 12
    Call number: ZSP-553-198,2
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 266 S.
    ISBN: 8717021200
    Series Statement: Meddelelser om Grønland 198,2
    Language: English
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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-201-76/4
    In: CRREL Report, 76-4
    Description / Table of Contents: Large areas of grounded sea ice have been reported by early arctic explorers and more recently by the U.S. Coast Guard. The ESSA, ERTS, NOAA and DMSP satellites now provide multispectral imagery with sufficiently high resolution to allow detailed sequential observations to be made of the movement and spatial extent of arctic sea ice. This report discusses the location, formation and decay of five large (greater than 30 sq km) islands of grounded sea ice in the southern Chukchi Sea as observed for an extended period of time using satellite imagery. Measurements of the bathymetry around one grounded sea ice feature are presented along with observations made and photos taken from the ice surface. The potential use of these sea ice islands as research stations is also discussed.
    Type of Medium: Series available for loan
    Pages: v, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 76-4
    Language: English
    Note: Contents Introduction The discovery Age of the island Island visit Other islands of grounded ice Discussion Literature cited
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  • 14
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/6
    In: CRREL Report, 76-6
    Description / Table of Contents: Water flow through the vein structure of temperate ice is described as Darbian flow in which the pressure gradient is determined from vein size and overburden pressure. A solution method for the resulting equation is given and two special cases are considered. For steady flow the equilibrium vein size is a function of depth and, by neglecting the effects of diffusion, it is shown that flow perturbations introduced at the surface propagate downward at a constant speed.These perturbations propagate so slowly that even annual surface fluctuations of flow may be eliminated by diffusion before reaching the bottom of the glacie
    Type of Medium: Series available for loan
    Pages: iii, 5 Seiten , Illustrationen
    Series Statement: CRREL Report 76-6
    Language: English
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  • 15
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/9
    In: CRREL Report, 76-9
    Description / Table of Contents: Access to study areas may be an important factor in long-term field-oriented research, particularly in-regions without well-developed road and communications systems. In a wildland hydrometeorology research project in subarctic Alaska, access to and within a 40-square-mile research watershed has been developed both in accordance with a general plan prepared at project inception and in response to developing research requirements. Foot trails, trails for 'off-road' low-ground-pressure tracked vehicles, helicopter transport, long-term data recorders, and radio telemetry of data have all been incorporated in an access and communications system. Cost estimates indicate that incorporation of gravel roads into the system would be economically advantageous, given adequate funding for initial road construction.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-9
    Language: English
    Note: Contents Abstract Preface Conversion factors for U.S. customary and SI units Introduction Access within the Caribou-Poker Creeks Research Watershed Trail access Helicopter access Road access Alternative approaches Long-term recorders Telemetry systems Remote sensing Relative costs A desirable system Selected bibliography
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  • 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-201-76/16
    In: CRREL Report, 76-16
    In: Mechanics of cutting and boring, (DE-B103)20210225152525
    Description / Table of Contents: This report, which is one of a series on the mechanics of cutting and boring in rock, deals with the kinematics of machines such as rotary drills, augers, tunnel boring machines, corers, and raise borers, in which the rotary cutting unit revolves about an axis that is parallel to the machine's direction of advance. The discussion and analysis cover the geometry and motion of various components of the cutting systems, including such topics as tool trajectories, tool speeds, motions of the more complicated mechanisms, chipping depth, penetration rates, production and clearance of cuttings, tool angles, and spatial distribution of cutters. Worked examples are given to illustrate the application of various equations to practical problems.
    Type of Medium: Series available for loan
    Pages: ix, 45 Seiten , Illustrationen
    Series Statement: CRREL Report 76-16
    Language: English
    Note: CONTENTS Abstract Preface Summary Foreword Terminology Trajectories of fixed tools Trajectories of roller cutters and indenters Speed of fixed cutting tools Speed of rolling disc cutters Speed and geometry of "wide" roller cutters Skidding rollers "Spiked" rollers Epicyclic or planetary mechanisms Chipping depth and penetration rate Chip production and cutting removal rate Balancing cutting and clearing rates in flight augers Tool relief angles - kinematic considerations Tool rake angles Distribution and spacing of cutting tools Radial tool spacing Angular tool spacing Spacing in the axial direction Literature cited
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  • 17
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/20
    In: CRREL Report, 76-20
    Description / Table of Contents: Under ordinary conditions the freezing of water begins with supercooling and ice nucleation, and proceeds at 0°C at the ice/water interface until ice formation stops. The presence of solutes, high pressure, or dispersal in fine pores causes the water to freeze at temperatures below 0°C (the so-called freezing point depression). Whenever freezing begins, it pro­ceeds at a constant temperature, or at a temperature which becomes progressively lower. A temperature rise during ice formation is considered here to be an anomaly. Under all equal circumstances, the conditions under which an anomal­ous freezing temperature is observable appear to be very special. This report describes two different experiments dis­playing the anomalous rise of temperature after nucleation and during ice formation. In one case the water was dispersed in the fine pores of fine powders; in the other case pure water was frozen in a transparent insulated cell. Photographic observations were made; relations of ice surface to water volume were measured.
    Type of Medium: Series available for loan
    Pages: iv, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 76-20
    Language: English
    Note: CONTENTS Page Abstract Preface Conversion factors for U.S.customary and SI units Introduction Materials, instruments, measurements Experiments with water freezing in fine pores Freezing experiments with bulk water Summary and conclusions Literature cited
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  • 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-201-76/17
    In: CRREL Report, 76-17
    In: Mechanics of cutting and boring, (DE-B103)20210225152525
    Description / Table of Contents: This report, which is one of a series on the mechanics of cutting and boring in rock, deals with the kinematics of machines which utilize a continuous belt as the cutting unit (e.g. coal saws, shale saws, digger-chain trenchers). The discussion and analysis cover the geometry and motion of various components of the cutting system, including such topics as chipping depth, production and conveyance of cuttings, tool trajectories, tool speeds, tool angles, and arrangement of cutting tools on the belt. Worked examples are included to illustrate the application of various equations to practical problems
    Type of Medium: Series available for loan
    Pages: viii, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 76-17
    Language: English
    Note: Contents Abstract Preface Summary Foreword Introduction Terminology Chipping depth Production and conveyance of cuttings Tool trajectories Tool speeds Tool relief angles — kinematic considerations Tool rake angles Belt curvature, slackness and flexibility Tool layout Longitudinal tool spacing Transverse tool spacing Cross-section profiles of the kerf Literature cited
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  • 19
    Monograph available for loan
    Monograph available for loan
    Associated volumes
    Call number: ZSP-558-8
    In: Middle atmosphere program
    Type of Medium: Monograph available for loan
    Pages: 76 S.
    Language: English
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  • 20
    Call number: ZSP-558-9 ; MOP 46209 / Mitte
    In: Middle atmosphere program
    Type of Medium: Series available for loan
    Pages: 579 S. : Ill., graph. Darst.
    Language: English
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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-201-76/22
    In: CRREL Report, 76-22
    Description / Table of Contents: Several membrane materials used or considered for MESL (membrane-enveloped soil layer) utilization of poor soils in road construction have been tested for cold effect on puncture and stiffness. PE (polyethylene) film was also tested for solvent soak effects. A simple blunt needle apparatus was devised for puncture testing. For plastic films (mainly PE), both puncture resistance and stiffness increase at low temperature (0 F, -18 C). For non-woven, spunbonded fabrics these properties are little affected by cold. For both non-wovens and PE film, puncture and bending strengths increase linearly with weight or thickness. The slope is steeper for the non-wovens, which generally are stronger on a per unit weight basis. PE film soaked in a hydrocarbon solvent swelled approximately 17% and lost about 30-40% its puncture strength. These effects are apparently reversible upon drying. Consideration has been given to sealing and patching requirements and to the drying of sealant liquids when adhering film to film. Also considered have been pos­sible slippage related to the reported low angle of friction of plastic films in soil and the possibility of lamination for improved membrane properties.
    Type of Medium: Series available for loan
    Pages: v, 60 Seiten , Illustrationen
    Series Statement: CRREL Report 76-22
    Language: English
    Note: CONTENTS Page Abstract Preface Introduction Experimental Materials Apparatus Procedure Results Discussion PE solvent soak and swelling PE solvent soak and puncture Film puncture rate effect Bending orientation Comparative tables and graphs Puncture and temperature Bending and temperature Test result vs thickness and weight General considerations Conclusion and recommendations Literature cited Appendix Detailed data tables Denier explanation
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  • 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-201-76/23
    In: CRREL Report, 76-23
    Description / Table of Contents: This report describes the study of piles tested in polar snow at Camp Century, Greenland. More than 20 piles of various lengths and sizes were driven, including timber, closed-end and open-end steel pipe piles, and I- and H-piles. The H-piles were instrumented with strain gages. In addition to the driven piles, two purely end-bearing piles were installed in augered holes and five piles were frozen in place using a snow-water slurry. Driving records were obtained and are discussed. Analysis of the driving response of various piles revealed that the Hiley formula, and presumably other similar pile driving formulas, cannot be used to predict the ultimate supporting capacity of piles driven in snow. Factors such as pile inertia, rigidity, size, and tip resistance are discussed in relation to their apparent influence upon pile penetration. Pile load test procedures are described and test results are discussed. It was found that closed-end pipe piles are decidedly inferior to open-end pipe piles in their load-carrying capability and their ultimate supporting capacity. Although pile settlement was found to be dependent upon such variables as pipe load, time, pile shape, and snow temperature, precise effects of these variables were not determined. Nevertheless, the capability of open-end piles to carry quite heavy loads was demonstrated and a procedure is presented for testing these piles in snow.
    Type of Medium: Series available for loan
    Pages: ix, 132 Seiten , Illustrationen
    Series Statement: CRREL Report 76-23
    Language: English
    Note: Contents Abstract Preface Introduction Test site Pile driving equipment Test instrumentation Testing procedures Pile driving data Pile type vs driving resistance Closed-end vs open-end piles Calculated bearing capacity of pile Effect of pile driving on the embedment medium Pile inclination Slurried-in-place piles Pile load test data Strain gage instrumentation and results Pile excavation Discussion and conclusions Literature cited Appendix A: Theoretical elastic deflection of piles supported by skin friction Appendix B: Trench floor arching study
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  • 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-201-76/12
    In: CRREL Report, 76-12
    Description / Table of Contents: The heat transfer processes associated with melting and refreezing a drill hole 500 m in depth and 0.150 m in initial radius through an ice shelf were approximately analyzed. The results were expressed in graphical form showing the time available for experimentation under the hole as a function of heating duration and heating strength. It was found that the refreezing of the drill hole had a much slower rate than the melting of the hole.
    Type of Medium: Series available for loan
    Pages: vi, 15 Seiten , Illustrationen
    Series Statement: CRREL Report 76-12
    Language: English
    Note: Contents Abstract Preface Summary Nomenclature Introduction Analysis Melting period Freezing period Calculation Conclusion Literature cited Appendix A: Justification of using eq 8 for the calculation of heat transfer coefficient h
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  • 24
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/13
    In: CRREL Report, 76-13
    Description / Table of Contents: The thermal structure and ice conditions of Lake Champlain, a mid-latitude large lake, near Shelburne Point, Vermont, were studied during the winter of 1974-75. The lake was instrumented to a depth of 8.5 m with a string of highly calibrated thermistors, connected to a data logger on shore which recorded water temperatures every four hours. An ice mooring system was developed to anchor the thermistor string so that ice and water temperatures could be obtained at known levels. This temperature recording system measured vertical and horizontal variations in ice and water temperature regimes during ice formation, growth and decay. Meteorological data were measured during the winter period November 1974 through March 1975 at the site. Ice stratigraphy was determined for the ice at the site at its maximum seasonal growth for comparison with ice from St. Albans Bay (at the northern end of Lake Champlain) which had formed earlier. Correlations were determined between ice growth and accumulated degree days of freezing. The operation of a bubbler system installed near the measurement site around a service dock was observed.
    Type of Medium: Series available for loan
    Pages: vii, 22 Seiten , Illustrationen
    Series Statement: CRREL Report 76-13
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Climate Site selection Instrumentation, measurements and calibration Installation of automatic water temperature recording system Visual observations and ice structure St. Albans Shelburne Analysis Temperature comparison Water temperature measuring system Changes in water temperature Wind Degree-days of freezing Prediction of ice formation Bubbler system Conclusions Recommendations Literature cited
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  • 25
    Call number: Q 2435/37 ; ZSP-319/C-37 ; MOP Per 581(3/37)
    In: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde, Heft 37
    Type of Medium: Monograph available for loan
    Pages: 191 Seiten , Illustrationen, Karten , 1 Karte
    ISSN: 0435-6187
    Series Statement: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde 37
    Language: German , English , Russian
    Note: Kartenbeilage unter dem Titel: Berge der Deutsch-Sowjetischen Freundschaft : Antarktika Enderby-Land = Gory Nemecko-Sovetskoj Družby : Antarktika Zemlja Ėnderbi 〈1 : 10 000〉 , Inhaltsverzeichnis Vorwort Rezjume Abstract Teil I: Allgemeiner Teil 1. Arbeitsprogramm und Arbeitsgebiet (S. MEIER) 1.1. Arbeitsprogramm 1.2. Meßmethoden 1.3. Hauptarbeitsgebiet Hays-Gletscher 1.4. Lokale Eiskappe von Molodežnaja 1.5. Vergleichsobjekt Campbell-Gletscher 2. Expeditionsverlauf (K. DRESZLER) 3. Ausrüstung (K. DRESZLER) 4. Klimatische Bedingungen (K. DRESZLER) Teil II: Meßverfahren und -ergebnisse 1. Geodätische und kartographische Grundlagen 1.1. Festpunkte (R. EGER) 1.2. Kartenunterlagen (K. DRESZLER) 2. Geodätisch-glaziologische Traverse 2.1. Erkundung und Signalisierung (S. MEIER} 2.1.1. Verlauf der Traverse 2.1.2. Erkundung, Punktabstand 2.1.3. Signalisierung 2.2. Lagemessung und trigonometrische Höhenübertragung 2.2.1. Streckenmessung 2.2.2. Winkelmessung 2.2.3. Technologischer Ablauf 2.2.4. Auswertung der Messungsergebnisse 2.3. Astronomische Beobachtungen (R. DIETRICH) 2.4. Deformationsraten (S. MEIER) 2.5. Barometrisches Höhenprofil (R. DIETRICH) 2.5.1. Zielstellung 2.5.2. Das Meßverfahren 2.5.3. Diskussion der Fehlereinflüsse 2.5.3.1. Fehler im angenommenen theoretischen Modell 2.5.3.2. Fehler bei der praktischen Messung 2.5.4. Ergebnisse 2.6. Oberflächenneigungen (S. MEIER) 2.7. Photogrammetrische Geländeaufnahmen (K. DRESZLER) 2.7.1. Zunge des Hays-Gletschers 2.7. 2. Einzugsgebiet des Hays-Gletschers 2.8. Glaziologische Arbeiten (S. MEIER) 2.8.1. Ziel der Feldarbeiten 2.8.2. Pegelablesungen 2.8.3. Überblick über Firnaufgrabungen. Firnschichtung 2.8.4. Dichtemessungen 2.8.5. Firntemperaturmessungen 2.8.6. Akkumulationsraten und -profile 2.8.7. Oberflächenbeobachtungen 3. Bewegungsmessungen am Hays- und Campbell-Gletscher 3.1. Photogrammetrjsche Bewegungsmessungen am Hays- und Campbell-Gletscher (K. DRESZLER) 3.2. Auswertung photogrammetrischer Bewegungsmessungen (S. MEIER) 3.2.1. Auswerteziel 3.2.2. Auswertefolge 3.2.3. Besonderheiten 3.2.4. Ergebnisse 3.2.5. Meßfehler 3.3. Trigonometrische Bewegungsmessungen am Campbell-Gletscher (R. EGER) 4. Eisdickenmessungen und Meereslotungen 4.1. Ergebnisse von Radarsondierungen (Messung V. I. CUDAKOV) G. W. TREPOV, Bearbeitung S. MEIER) 4.2. Ergebnisse von Gravimetermessungen (Messung N.D. TRETJAKOV, Bearbeitung C. OELSRER) 4.3. Drahtlotung Spooner-Bucht (S. MEIER) 5. Sonderarbeiten 5.1. Results of meteorological Observations at Camp Abendberg and during the oversnow traverses (E. KAUP) 5.1.1. Meteorological observations at Camp Abendberg 5.1.2. Meteorological Observations during the oversnow traverses 5.2. Küstennahe Ablation und temperierte Firnschicht (S. MEIER) 5.3. Analyse der Sedimentprobe vom Boden der Spooner-Bucht (J. ELIDBERG, F. FALK) 5.4. Refraktionsbeobachtungen (R. EGER) 5.4.1. Beobachtungsprogramm 5.4.2. Beobachtungsergebnisse 5.5. Untersuchungen zur barometrischen Höhenbestimmung von Einzelpunkten (R. DIETRICH) 5.5.1. Einführung 5.5.2. Beobachtungsverfahren und -geräte 5.5.3. Auswertungsmethode 5.5.4. Ergebnisse 5.5.5. Zusammenfassung und Schlußfolgerungen 5.6. Topographische Aufnahme der Berge der Deutsch-Sowjetischen Freundschaft (K. DRESZLER) 5.6.1. Allgemeine Beschreibung 5.6.2. Topographische Aufnahme 5.6.3. Photogrammetrische Auswertung 5.6.4. Kartographische Arbeiten (H. BRUNNER) 5.6.5. Ergebnis Teil IIIa Glaziologische Ergebnisse der Feldarbeiten (S. MEIER) 1. Topographie und Orographie 1.1. Topographie der Eisoberfläche 1.2. Topographie des Felsuntergrundes. Eisdicken 1.3. Abflußgebiete. Gletschergrenzen 1.4. Frontlagen und -höhen 2. Eisbewegung und Deformation 2.1. Frühere Beobachtungen am Hays- und Campbell-Gletscher 2.2. Geschwindigkeitsfeld Hays-Gletscher 2.3. Querkontraktion und Längsdilatation 2.4. Zeitliche Bewegungsschwankungen 2.5. Bewegung der schwimmenden Zunge und Kalbungsrhythmus 2.6. Geschwindigkeit und Kalbungsrhythmus des Campbell-Gletschers 3. Eigenschaften des Oberflächenfirns 3.1. Temperaturen und Temperaturgradienten 3.2. Dichte, Härte, Schichtung 3.3. Vorherrschende Winde und Schneedrift 4. Komponenten des Massenhaushalts 4.1. Schneeakkumulation 1972 4.2. Schneeablation 1972/73 4.3. Eisausstoß 5. Zusammenfassung und Schlußfolgerungen Literatur Anlagen Kartenbeilage , Zusammenfassung in russischer Sprache , Text teilweise in kyrillischer Schrift , Beiträge teilweise in deutscher, teilweise in englischer Sprache
    Location: Upper compact magazine
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  • 26
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/18
    In: CRREL Report, 83-18
    Description / Table of Contents: An evaluation of an impulse radar system for detecting cavities under concrete pavement is discussed, and field results are presented. It was found that a dual antenna mode of surveying was ideal for void detection. In this mode one antenna operated in a transceive mode and a second, offset from the first, operated in a receive-only mode. This arrangement allowed a refraction-type profile survey to be performed, which enabled subpavement voids to be easily detected. Field trails were held at Plattsburgh Air Force Base, where 28 cavities were detected and mapped. Drilling of holes verified that a cavity existed and allowed cavity depth to be measured. The cavities varied from 1.5 in. to 23 in, depth and were up to 20 ft. long.
    Type of Medium: Series available for loan
    Pages: 49 Seiten , Illustrationen
    Series Statement: CRREL Report 83-18
    Language: English
    Note: CONTENTS Abstract Preface Introduction Plattsburgh Air Force Base Radar sounding system Survey procedure Cavity inspection Radar cavity detection test Radar profile results Falling-weight deflectometer tests Discussion and conclusions Literature cited
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  • 27
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/12
    In: CRREL Report, 83-12
    Description / Table of Contents: This paper documents the development and verification of two finite difference models that solve the general two-dimensional form of the heat conduction equation, using the alternative-direction implicit method. Both can handle convective, constant flux, specified temperature and semi-infinite boundaries. The conducting medium may be composed of many materials. The first program, ADI, solves for the case where no change of state occurs. ADIPC solves for case where a freeze/thaw change of phase may occur, using the apparent heat capacity method. Both models are verified by comparison to analytical results.
    Type of Medium: Series available for loan
    Pages: 74 Seiten , Illustrationen
    Series Statement: CRREL Report 83-12
    Language: English
    Note: CONTENTS Abstract Preface Introduction Finite differences applied to heat transfer Heat conduction equation Boundary conditions Phase change Computer program ADDATA, the data subroutine TRIDIG, the matrix solver ISOTHM, the isotherm finider ADI, main program ADEPC, main program Verification of ADI Comparison of ADI with analytical results Comparison of ADI with experimental results Verification of ADIPC Comparison of ADIPC with analytical results-the Neumann solution Comparison of ADIPC with analytical results-two-dimensional phase change verification User instruction for ADI User instruction for ADIPC Conclusions Literature cited Appendix A. Program INFSUM and sample input and output for program ADI Appendix B. Program ADIPC and sample input and output
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  • 28
    Call number: ZSP-SCAR-570-5
    In: National Antarctic Research Report to SCAR, No. 5
    Type of Medium: Series available for loan
    Pages: 35 Seiten
    ISSN: 0179-0072
    Series Statement: National Antarctic Research Report to SCAR 5
    Language: English
    Note: Contents: Membership of the National Committee on Antarctic Research in the Federal Republic of Germany. - Introduction. - Stations. - I. Record of Activities (past and ongoing), April 82-October 83. - II. Planned Activities, October 83-October 84. - References.
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  • 29
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-83/30
    In: CRREL Report, 83-30
    Description / Table of Contents: Ice sheets are formed and retained in several ways in nature, and an understanding of these factors is needed before most structures can be successfully applied. Many ice sheet retention structures float and are somewhat flexible; others are fixed and rigid or semirigid. An example of the former is the Lake Erie ice boom and of the latter, the Montreal ice control structure. Ice sheet retention technology is changing. The use of timber cribs is gradually but not totally giving way to sheet steel pilings and concrete cells. New structures and applications are being tried but with caution. Ice-hydraulic analyses are helpful in predicting the effects of structures and channel modifications on ice cover formation and retention. Often, varying the flow rate in a particular system at the proper time will make the difference between whether a structure will or will not retain ice. The structure, however, invariably adds reliability to the sheet ice retention process.
    Type of Medium: Series available for loan
    Pages: iv, 39 Seiten , Illustrationen , 1 Beilage
    Series Statement: CRREL Report 83-30
    Language: English
    Note: Contents Abstract Preface Introduction Natural ice sheets Choosing an ice control structure Flexible structures Ice booms Frazil collector lines Fence booms Rigid or semirigid structures Pier-mounted booms Stone groins Artificial islands Removable gravity structures Timber cribs Weirs Pilings and dolphins Structures built for other purposes Hydroelectric dams Wicket dams Light piers and towers Bridge piers Breakwaters Ice control not using Structures Channel improvements Ice sheet tying Ice sheet bridges Conclusions Literature cited Appendix A: Ice control structure
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  • 30
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/29
    In: CRREL Report, 83-29
    Description / Table of Contents: A literature review indicated that the effects or permafrost on streambank erodibility and stability are not yet understood because systematic and quantitative measurements are seriously lacking. Consequently, general controversy exists as to whether perennially frozen ground inhibits lateral erosion and bankline recession, or whether it increases bank recession rates. Perennially frozen streambanks erode because of modification of the bank's thermal regime by exposure to air and water, and because of various erosional processes. Factors that determine rates and locations of erosion include physical, thermal and structural properties of bank sediments, stream hydraulics and climate. Thermal and physical modification of streambanks may also induce accelerated erosion within permafrost terrain removed from the immediate river environment. Bankline or bluffline recession rates are highly variable, ranging from less than 1 m/year to over 30 m/year and, exceptionally, to over 60 m/year. Long-term observations of the physical and thermal erosion processes and systematic ground surveys and measurements of bankline-bluffline recession rates are needed.
    Type of Medium: Series available for loan
    Pages: iv, 26 Seiten , Illustrationen
    Series Statement: CRREL Report 83-29
    Language: English
    Note: CONTENTS Abstract Preface Introduction Stream bank erosional processes Permafrost and related factors Permafrost and erosion General Erosional processes Bank zone processes Bluff zone processes Factors affecting perm afrost erodibility Exposure to currents and wind waves Texture and stratigraphy Ice content, distribution and type Slope aspect Coriolis force Timing and depth of thaw Water level and temperature Vegetation Ice and snow cover Groundwater Rates and timing of erosion and recession Overall effects of permafrost Recommendations for research Literature cited Appendix A : Processes of stream bank modifications
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  • 31
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/31
    In: CRREL Report, 83-31
    Description / Table of Contents: A mathematical model is described that is used to determine the maximum ice conveyance capacity of a river channel. Based upon this model, computer programs were developed that enable the ice discharge to be calculated for steady-state flow conditions. For rivers that have uniform flow, the maximum ice-conveying capacity can be described with a simple function expressed in terms of the size of the ice fragments, channel geometry, and the flow of water in the river. For nonuniform flows, the computer program determines the elevation profile of the surface layer in addition to other flow characteristics, such as the velocity and surface concentration of the ice fragments. The location along this surface profile where the ice conveyance capacity becomes less than the upstream supply is determined and is considered to be the position where a surface ice jam or ice bridge will be formed.
    Type of Medium: Series available for loan
    Pages: iv, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 83-31
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Constitutive relationships Equations of motion Uniform flow Nonuniform flow Ice transport: Uniform flow Symmetric channel Asymmetric channel Ice transport: Nonuniform flow Further considerations Basis for model improvement Conclusions Literature cited
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  • 32
    Call number: ZSP-201-83/32
    In: CRREL Report, 83-32
    Description / Table of Contents: Ice forces on a bridge pier in the Ottauquechee River, in Quechee, Vermont, were measured by installing fourpanels-each capable of measuring forces in the normal and tangential direction - on both sides of a vertical V-shaped pier nose. The measured forces are presented for a short period during an ice run. After the ice run, the thickness and sizes of the ice floes were measured and the compressive strength of the ice was determined in the laboratory from the ice samples collected along the river banks. The water level measurements made at several locations along theriver are also presented for the period of the ice run.
    Type of Medium: Series available for loan
    Pages: ii, 8 Seiten , Illustrationen
    Series Statement: CRREL Report 83-32
    Language: English
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  • 33
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/33
    In: CRREL Report, 83-33
    Description / Table of Contents: A thermodynamic model has been developed that for the first time describes the entire creep process, including primary, secondary, and tertiary creep, and failure for both constant stress (CSR) tests (σ= const.) and constant strain rate (CSR) tests (ϵ = const.), in the form of a unified constitutive equation and unified failure criteria. Deformation and failure areconsidered as a single thermoactivated process in which the dominant role belongs to the change of entropy. Failure occurs when the entropy change is zero. At that moment the strain rates in CS tests reach the minima and stress in CSR tests reaches the maximum (peak) values. Families of creep (ϵ vs τ) and stress-strain (σ vs ϵ) curves, obtained from uni-axial compression CS and CSR tests of frozen soil, respectively (both presented in dimensionless coordinates), are plotted as straight lines and are superposed, confirming the unity of the deformation and failure process and the validity of the model. A method is developed for determining the parameters of the model, so that creep deformation and the stress-strain relationship of ductile materials such as soils can be predicted based upon information obtained from either type of test.
    Type of Medium: Series available for loan
    Pages: v, 25 Seiten , Illustrationen
    Series Statement: CRREL Report 83-33
    Language: English
    Note: CONTENTS Abstract Nomenclature Introduction Principal relationships Constitutive equation Failure criteria Secondary creep: Flow equations Creep at constant stress (σ = Const.) Creep model Creep strain (σ = Const.) Creep at constant strain rate (ϵ = Const.) Stress-strain relationship Stress/strain/strain rate at failure Test data Preliminary analysis Constant stress tests (σ = Const.) Constant strain rate tests (ϵ = Const.) The principle of superposition Thermodynamic equation of creep Conclusions Literature cited
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  • 34
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/4
    In: CRREL Report, 83-4
    Description / Table of Contents: Measurements and analysis of seasonal ice growth and decay on Post Pond, New Hampshire, for the period 1973-1982 are presented. Observations included ice thickness measurements, examination of the various ice types contributing to the ice cover, and measurements of meteorological parameters for correlation with and modeling of the ice growth process. The overall nature of ice growth and decay (ice loss) on the Post Pond has been ascertained, the seasonal variability in the timing of freeze-up and ice-out and the duration of the ice cover have been determined, and the relationship of ice growth to freezing-degree-day (deg C) records evaluated on the basis of a Stefan conduction equation modified to deal with ice sheets covered with or free of snow. Ice growth occurs predominantly by the direct freezing of lake water, but snow ice may compose as much as 50% of the ice cover in winters with higher than average snowfall. Freeze-up leading to the establishment of a stable ice cover occurs during the 4-week period from the end of November to the end of December. Maximum seasonal ice thicknesses were from 45 to 67 cm and are generally attained during the first two weeks of March; ice-out, marking the final disappearance of ice from Post Pond, usually occurs by the third week of April. The overall rate of the ice loss is three to four times that of ice growth, and is dominated initially by melting from the top. As much as 50% of the ice may be lost in this way before the onset of any bottom melting. Final dissipation of the ice cover is usually expedited by candling resulting from preferential melting and disintegration of the ice at crystal boundaries.
    Type of Medium: Series available for loan
    Pages: iv, 30 Seiten , Illustrationen
    Series Statement: CRREL Report 83-4
    Language: English
    Note: CONTENTS Abstract Preface Introduction Location of study Study methods Ice thickness Ice-cover composition Surface air temperatures Freeze-up and ice-out characteristics Results and discussion Ice-growth record Freezing-degree-day records Ice-growth predictions Summary and conclusions Literature cited Appendix A: Ice-growth records Appendix B: Measured and computed ice-growth curves
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  • 35
    Call number: ZSP-201-76/30
    In: CRREL Report, 76-30
    Description / Table of Contents: The focus of this investigation was to assess the utility of remote sensing techniques in the study of land use-water quality relationships in an east central Wisconsin test area. The following types of aerial imagery were evaluated for this purpose: high altitude (60,000 ft) color, color infrared, multispectral black and white, and thermal; low altitude (less than 5000 ft) color infrared, multispectral black and white, thermal, and passive microwave. A non-imaging hand-held four-band radiometer was evaluated for utility in providing data on suspended sediment concentrations. Land use analysis includes the development of mapping and quantification methods to obtain baseline data for comparison to water quality variables. Suspended sediment loads in streams, determined from water samples, were related to land use of dfferences and soil types in three major watersheds. A multiple correlation coefficient R of 0.85 was obtained for the relationship between the 0.6-.7 incident and reflected radiation data from the hand-held radiometer and concurrent ground measurements of suspended solids in streams. Applications of the methods and baseline data developed in this investigation include: mapping and quantification of land use; input to watershed runoff models,estimation of effects of land use changes on stream sedimentation; and remote sensing of suspended sediment content of streams. High altitude color infrared imagery was found to be the most acceptable remote sensing technique forthe mapping and measurement of land use types.
    Type of Medium: Series available for loan
    Pages: vi, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 76-30
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric (SI) units of measurement lntroduction Objectives Approach and project history Study area Physical setting Cultural setting Documented pollution sources in the study area Evaluation of imagery Photographic imagery Thermal imagery PMIS imagery Land use analysis Analysis of 1972 imagery Analysis of 1974 imagery Soils of Manitowoc, East Twin and Oconto River watersheds Manitowoc River watershed East Twin River watershed Oconto River watershed Water quality data Manitowoc River East Twin River Oconto River Land use/stream sedimentation relationships Results and conclusions Sensor evaluation Land use analysis Mapping approaches Land use/sedimentation relationships Cost effectiveness analysis Recommendations and applications Selected bibliography Appendix A. Precipitation and temperature data
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  • 36
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/38
    In: CRREL Report, 76-38
    Description / Table of Contents: Current methods for evaluation of the moisture absorption of plastic insulations (ASTM-C-272-53 and ASTM-C-355-64) due to vapor pressure gradients or immersion rely on short time periods to predict long term performance. This procedure may not provide accurate information on performance since in practice insulations may absorb more moisture than these tests indicate. A series of tests were conducted on extruded polystyrene roof insulation that had been in place, exposed to environmental moisture and pressure gradients, for a maximum of 36 months. Results indicate that moisture absorption of 1.5% by volume can be expected in the field.
    Type of Medium: Series available for loan
    Pages: iv, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 76-38
    Language: English
    Note: CONTENTS Abstract Preface Conversion factors: U.S. customary to metric (SI) units of measurement Introduction Principal features of a protected membrane roof system Reported advantages of a protected membrane roof system Study sites Stevens Hall, University of Alaska, Fairbanks Building 41 5, University of Alaska, Fairbanks Building 1053, Ft. Wainwright, Alaska Gruening Building, University of Alaska, Fairbanks Consortium Library and K Building, University of Alaska, Anchorage CRREL Laboratory, Hanover, New Hampshire Resources Building, University of Alaska, Fairbanks Insulation properties Sampling Results Bulksamples Sliced samples Conclusions and recommendations Literature cited Appendix A. Moisture contents Appendix B. Photographs
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  • 37
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/40
    In: CRREL Report, 76-40
    Description / Table of Contents: Several original methods were developed to photograph artifacts in transparent materials such as ice. The artifacts, occurring in the surface, bulk, and interface, were generally 0.01 mm to 70 mm in size. Sample preparation, illumination, focusing and other technical problems are discussed in detail. Several sample photographs are included.
    Type of Medium: Series available for loan
    Pages: v, 36 Seiten , Illustrationen
    Series Statement: CRREL Report 76-40
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Equipment The microscope system The camera system Tools for preparation of sample Laboratory procedure Categorizing artifact Choosing setup Preparing sample llluminating sample Photographing artifact Results Literature cited Selected bibliography Appendix. Reference information for photomacrographic and photo-micrographic applications
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  • 38
    Call number: ZSP-980-69
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 1, 1 to 48
    In: ZfI-Mitteilungen, Nr. 69
    Type of Medium: Series available for loan
    Pages: 480 Seiten , Illustrationen
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 69
    Language: English
    Note: Contents of Part 1 S. Niese: Reactor neutron activation analysis of industrial materials R.P. Gardner, K. Verghese: Use of Monte Carlo methods in the calibration and design optimization of radiation gauges and analyzers R. Otto, P. Hecht: On labelling with generator nuclides M. Richter: Measurement of residence time distribution with radiotracers using periodic pseudo-random binary signal sequences J. Schoen: A computer code for tracer experiment data analysis H.-H. Deicke, J. Flachowsky, K.-P. Rudolph, N. Beiermann: Transit time measurements in technical plants by using a multichannel analyzer H. Bohne: Measurements of air currents L. Baranyai: Tracer study of simultaneous homogenization and segregation in industrial equipments N. Balabanov, N. Kapitanova: Application of radiotracer method for study of glass furnaces J. Thẏn: Evaluation of mixing particulate solids by radiotracer method H.-G. Koennecke, P. Kulicke, E. Antal, J. Jentzsch, H. Michael: Investigation of the mixing efficiency of kneading machines using radionuclides A.G. Belov, V.E. Zhuchko, Yu.S. Zamyatnin, Yu.G. Teterev, D. Rubio: Development of the nuclear-physical methods of analysis at the laboratory of nuclear reactions of the JINR R. Burek, K. Wojcik: A new concept for measuring of free moisture in solid materials N. Bachvarov, I. Georgiev, E. Manolov, P. Pavlov, H. Shukov, K. Tropolov: Process control system for fresh concrete preparation H. Baumbach: Investigation of moisture migration in the concrete of a special test construction under simulated load conditions A. Petrov, A. Sreno, H. Hristov, P. Penev, G. Georgiev: Beta-ray backscatter instruments for coating thickness measurements in electronic and electrotechnical industry W. Stuchlik, H. Kupsch: Radioactive level indicator for bulk materials in containers with calculation of the residual volume H. Baumbach, K. Fichtler, R. Melzer, D. Tietze, H. Ullrich: The determination of density variation in radiation protective walls of concrete by means of Bremsstrahlung of 1o MeV from linear accelerator D. Avramov: Modernized versions of mobile NDT laboratories V. Friedrich: Examples for radioisotope application in environment protection St. Szpilowski: Prediction of mixing length for transport of effluent in rivers A. Owczarczyk: The localization of the leakages through the dams and bottoms of large water reservoires W. Listwan: Progress in leak detection methods for underground pipelines and tanks J. Starẏ, A. Zeman, B. Havlik: Radionuclides in the investigation of the cumulation of toxic elements on alga and fish W. Richter, D. Kahl, H.-J. Grosse, F. Gleisberg: The use of an AIG-analyzer for the investigation of SO2-dispersion problems R. Goeldner, H.-J. Grosse, F. Gleisberg: Possibilities of the development of improved smoke detectors J. Adler, H.-R. Doering, H.-J. Grosse, F. Gleisberg: The use of the AIG in microelectronics P. Popp, R. Fahnert, S. Mothes, G. Oppermann: Methods for the determination of toxic compounds at work places H.-R. Doering. H.-J. Grosse: The detection of halocarbons by means of the aerosol ionization gas analyzer (AIG) E, Jaworska, I. Kaluska, G. Strzelczak: Crosslinking and free radical decay reactions in irradiated polyethylene in presence of additives J. Zahalka: Radiation modified materials in machine engineering W. Bobeth, R. Hanke, A. Heger, J. Morgenstern, H. Paessler: Technological aspects of planar structurizing on woven and knitted fabrics by localized radiation induced grafting B. Ihme, E. Maeder, A. Mally: Problems in the development of high-energy radiation processing of woven and knitted fabrics S. Nikolov. P, Panayotov, V. Diakova, M. Nikolova: Radiation modification of timber in people's republic of Bulgaria H. Dahlhelm. G. Matejko. G. Huebner: Experiments on sprouting inhibition in onions J. Thẏn: Process analysis with nuclear technique A. Merz: Axial dispersion and homogenization in chemical engineering systems A. Zeuner, F. Hartmann: Investigation of material transport in rotating dryers by aid of Lanthanum-140 D. Manr: Tracer research for modelling of Ion-exchange equipment
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  • 39
    Call number: ZSP-980-70
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 2, 50 to 97
    In: ZfI-Mitteilungen, Nr. 70
    Type of Medium: Series available for loan
    Pages: 355 Seiten , Illustrationen
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 70
    Language: English
    Note: Contents of Part 2 Hecht, K. Gerber, R. Otto: Studies on the drying of paints by means of 14C-labelled compounds K. Wagner, F. Brutschin, I. Ritter, T. Gritsch, H. Zimmermann, H. Borchert: Investigations by the aid of radioisotope methods on the technology of the production of carbon and silicon carbide materials K. Gloe, P. Mühl: Determination of metal extraction process parameters using tracer technique W. Migdał, W. Łada, K. Malec-Czechowska: Studies on liquid-liquid extraction of noble metals using radiotracers L. Petryka, K. Przewłocki: Radiotracer investigations of benefication copper ore in the industrial flotation process Z. Bazaniak, J. Palige: Determination of Cu recovery degree from slags in shaft process by means of radiotracers R. Burek, J .K. Zurawicz: On the optimization of concentration measurements in heterogeneous materials based on β-backscatter measurements B. Heinrich: Analysis of carbon content in crude brown coal by inelastic scattering of neutrons and the method of time correlated associated particles P. Urbańaki, D. Wagner, M. Jankowska, E. Kowalska: Determination of calcium and iron and measurements of ash content in the brown coal H.-W. Thümmel: Some considerations relating to the prediction of the efficiency of radiometric methods for the continuous ash content determination of coal L. Wawrzonek: Monitor of ash content of coal with X-ray source I. Pavlicsek, V. Stenger, A. Veres: Apparatus for gamma activation analysis I. Végvári, I. Juhász: Determination of PbO content of lead-glass samples on the ground of gamma-absorption E. Schöntube, H.-J. Große: Aerosol ionization gas analysis as a monitoring for waste halothane in the atmosphere of operating theatre S. Mothes, P. Popp, G. Oppermann, W.-D. Herberg: Measurement of fluorocarbons with the ECD P. Popp, E. Schöntube, G. Oppermann: The usability of radiation ionization detectors for the determination of N2O concentrations in the air of operating theatres P. Popp, G. Arnold, G. Oppermann: A hydrocarbon-sensitized argon ionization detector for the detection of inorganic compounds R. Szepke, W. Lisieski, J. Harasimczuk: Automatic dust monitor AMIZ G. Vormum: Sealed sources - problems of design, measurement and quality control L. Gąsiorowski: New trends in developments of ratioisotope gauges in Poland G. Brunner: Direct chemical information from special radio tracers as well as from outer X-ray excitation J. Hirling: Experience and future trend in industrial application of nuclear methods in Hungary I. N. Ivanov, O. K. Nikolaenko, Yu. V. Phecktistov, V. L. Chulkin: Use of short-lived nuclides in activation analysis Kl.-P. Rudolph, J. Flachowsky, A. Lange: Trace element determination in semiconducter selenium by neutron activation analysis (NAA) W. Lisieski, J. Mirowicz: Some industrial applications of instruments with neutron sources R. Dybczyński, H. Maleszewaka, S. Sterliński, Z. Szopa, M. Wasek: Some problems in neutron activation determination of gold and silver in ores and concentrates of copper industry L. Jankowski: Cost-benefit aspects of radioisotope application in industry B. Manouchev, T. Boschkova, L. Tsankov, V. Gurev, I. Kojucharov, G. Grozev: On the possibilities of the direct gamma-spectremetry in natural waters P. Morgenstern, D. Müller, W. Riedel: A parallel grid proportional scintillation counter for the X-ray region from 3 to 20 keV with regard to high count rates N. A. Anders, V. S. Isaev, V. I. Filatov, B. E. Kolesnikov, D. Müller, P. Morgenstern, W. Riedel, V. P. Varvaritsa: X-ray fluroescence analyzer of light elements with proportional scintillation counter D. Müller, P. Morgenstern, W. Riedel, W. Warwariza, B. E. Kolesnikow, N. A. Anders, W. J. Filatov: General considerations concerning the use of the X-ray analyzer "RALE" in industry
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  • 40
    Call number: ZSP-980-80
    In: ZfI-Mitteilungen, Nr. 80
    Type of Medium: Series available for loan
    Pages: 158 Seiten , Illustrationen
    Edition: als Manuskript gedruckt
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 80
    Language: German , Russian , English
    Note: Inhaltsverzeichnis: ZUSAMMENFASSUNGEN DER VORTRÄGE. - Beiträge der Isotopengeologie zur Aufklärung des kontinentalen Wachstums / K. Wetzel. - Ein quantitatives Modell des Schwefelkreislaufes mit Berücksichtigung der Isotopenverhältnisse / G. Weise, K. Wetzel. - Die Prozesse der Stoffumwandlungen in den Anfangsstadien der Erbildung und die Isotopenzusammensetzung des endogenen Stickstoffs / W. F. Wolynez. - Problema juvenil'nosti v izotopnoj geologii / Ju. A. Borščevskij. - Zur Theorie von Isotopenaustauschgleichgewichten in komplizierten natürlichen Systemen / R. Haberlandt, G. Christoph. - Zur Berechnung und Interpretation natürlicher Isotopenvariationen in Alumosilikaten / G. Christoph. - The use of statistical mechanical perturbation theory for the calculation and interpretation of isotopic fractionation factors / M. Wolfsberg. - Relationship between anomalies in the relative abundance of 18O, 17O, 16O and anomalies in the temperature dependence of isotopic fractionation factors / M. Wolfsberg. - Metod rasčeta izotopnych effektov v prirodnych mineralach po približennoj modeli "Razdel'nych Kolebanin" / S. I. Gol'šev, N. L. Padalko. - Intramolekulare Sauerstoffisotopengeothermometrie an Hydrosilicaten / H. Schütze. - Der 18O-Index. Ein isotopengeochemisches Konzept / H. Schütze. - Matematičeskii analiz frakcionirovanija izotopov ugleroda v živoi kletke / A. A. Ivlev. - Anwendung der modifizierten Zelltheorie zur Berechnung von Zustandseigenschaften dichter isotopensubstituierter Fluide / H.-L. Vörtler, J. Heybey. - Statistisch-mechanische Behandlung der Unterschiede im Adsorptionsverhalten isotopischer Spezies / H. Heybey, H.-L. Vörtler. - Theoretische Untersuchungen zu Adsorptionsisotopieeffekten von Erdgaskomponenten unter erhöhten Drücken / J. Heybey, P. Harting. - Experimentelle Untersuchungen zu speziellen Adsorptionsisotopieeffekten unter geologischen Bedingungen / P. Harting, K. Weingart, H. Heybey. - Die Isotopenzusammensetzung (O, H, C, S, N) des Erdmantels / H. Hoefs. - Neodym- und Strontiumisotope und ihre Anwendung auf TR-Mineralisation / S. B. Brandt, W. S. Lepin, W. N. Solodjankina, T. I. Kolosnizyna. - Zur Veränderung der isotopischen Zusammensetzung des Sauerstoffs von Cherts und Carbonaten im Prozess der Diagenese/Metamorphose / O. Gebhardt, H. Schütze. - The isotopic study of Boron in the process of formation of ore deposits / V. I. Ustinov, V. A. Grinenko, S. M. Aleksandrov, T. R. Ivanova. - Temperaturnyj profil' redkometal'nogo mestoroždenija po izotopno-kislorodnym dannym / Ju. A. Borščevskij, S. N. Gavrikova, N. I. Medvedovskaja, V. Ja. Fedčuk. - Biogennye faktory forminrovanija izotopnogo sostava ugleroda organičeskogo veščestva porod facial'no-genetičeskogo tipa / A. A. Ivlev, R. G. Pankina, M. V. Dachnova. - Izotopnyj sostav ugleroda frakcij nefti i organičeskogo veščestva porod / M. G. Frik, Ė. M. Galimov. - Stable isotope ratios in natural gas components separated by gas chromatography / G. Hut. - C-Isotopenuntersuchungen zur Entwicklung des Altpaläozoikums im Thüringischen Schiefergebirge / K. Hahne, I. Maaß, H. Lützner, J. Ellenberg, F. Falk, E. Grumbt. - Isotopengeochemische, thermobarogeochemische und elementgeochemische Untersuchungen an einer hydrothermalen Fluorit-Mineralisaton aus dem Südteil der DDR / G. Strauch, H. Kämpf, R. Thomas, M. Geisler, G. Haase, G. Stiehl. - Untersuchungen zur Isotopenfraktionierung des Stickstoffs in den Systemen NH4+/NH3 und N3- /N2 / H.-M. Nitzsche, G. Stiehl. - δ15N-Profile in der Bodenzone und ihre zeitlichen Veränderungen / H. Hübner. - Izotopnyj sostav ugleroda karbonatov v mestoroždenijach samorodnoj sery / V. I. Kityk, B. I. Srebrodol'skij. - Untersuchungen zur Fraktionierung der Schwefelisotope bei der chemischen und biochemischen Oxydation von Sulfid zu Sulfat / I. Maaß, J. Heyer, K. Wetzel, G. Weise. - Selective determination of quantitative and isotopic composition of sulphur-minerals associations / V. I. Ustinov, V. A. Grinenko. - Untersuchungen zur CO2-Resorption aus thermoindifferenten Kohledioxidmineralwasserbädern durch die Haut des Menschen / G. Hübner, I. Maaß, C. Epperlein, G. Plötner, H. Jordan. - Frakcionirovanie izotopov ugleroda metanobrazujušimi bakterijami pri ich roste na različnych substratach / M. V. Ivanov, S. S. Beljaev, A. M. Ėjakun, V. A. Boidar', K. S. Laurinavičus, O. V. Šipin. - Izotopnyj sostav ugleroda metana, obrazuemogo mikroorganizmami v prirode / M. V. Ivanov, K. S. Laurinavičus, V. A. Bondar', S. S. Beljaev. - Isotopenhydrologische Untersuchungen - Arbeiten aus dem GSF-Institut für Radiohydrometrie / H. Moser. - Tritium im Niederschlag Antarktikas - Aussagen zur globalen Verteilung / D. Herbert. - Untersuchung der Beziehung der Deuteriumkonzentration zwischen atmosphärischem Wasserdampf und Niederschlägen im Gebiet der Schirmacheroase / Ostantarktis / P. Kowski. - Isotopenhydrologische und hydeochemische Charakterisierung von Seen im Gebiet der Schirmacher-Oase, Ostantarktika / W. Richter, U. Wand, G. Strauch, P. Kowski, W. Kurze. - Isotopenglaziologische Untersuchungen zur Klärung der Herkunft des Inlandeiskörpers südlich der Schirmacheroase / Ostantarktis / W.-D. Hermichen, P. Kowski. - Carbon-13 in atmospheric CO2: 1977-1981 / W. G. Mook, C. D. Keeling. - Anwendung von H2 18O auf ökologische und pflanzenphysiologische Fragestellungen / H. Förstel. - Komplexe Isotopenuntersuchungen an armenischen Mineralwässern / R. Trettin, A. Hiller, E. S. Chalatjan. - Die isotope Zusammensetzung des Kristallwassers von Carnalliten und ihrer Ausgangslösungen / H.-D. Schmiedl, K. Koch, T. Böttger, G. Stiehl, J. Pilot. - Zur hydrologischen Interpretation von Isotopendaten im Zusammenhang mit Stofftransportvorgängen / H. Jordan, D. Hebert, K. Fröhlich, R. Gellermann, R.-P. Schols. - Zwei neue Standards zur massenspektrometrischen Isotopenhäufigkeitsbestimmung von Wasserstoff, Kohlenstoff und Sauerstoff im Bereich natürlicher Häufigkeiten / M. Herrmann, H. Gerstenberger. - Methoden der chemischen Konzentrierung und Identifizierung bei der Suche nach seltenen Radionukliden in der Natur / H. Bruchertseifer. - Die Anwendung der ultraempfindlichen Massenspektrometrie zur Isotopenanalytik / H.-J. Dietze, S. Becker. - Möglichkeiten des Nachweises superschwerer Elemente mit massenspektrometrischen Methoden / S. Becker, H.-J. Dietze. - Isotope analysis on nano-mole gas samples / S. Hałas. - Neue Möglichkeiten zur Freisetzung von Messgasen für die massenspektrometrische Isotopenanalysis aus Feststoffen / G. Müller, D. Hessel, H. Zahn, K. Mühle. - Die Kontrolle der Standardmeßbedingungen bei C-14-Datierungen / J. Görsdorf. - Raspredelenie izotopa 14C v različnych uglerodsoderžaščich materialach i frakcijach paleopočv v svjazi s geologičeskimi uslovijami zachoronečnija / L. A. Orlova, V. A. Panyčev, I. V. Nikolaeva. - Some variations in the isotopic composition of uranogenic and thorogenic lead and their significance for investigations of geochronology and genesis of ore and rocks / B. G. Amov. - Neue Daten für die Beiisotopenverhältnisse in Feldspäten aus dem Kristallinkomplex, den Graniten und Erzen Südbulgariens / B. Amow, V. Arnaudow, Z. Baldjiewa, M. Pawlowa. - 40Ar/39Ar-Altersspektren eines Biotits / G. Kaiser, J. Pilot. - Kalium-Calcium-Isochronen für Sylvinite des sibirischen Tafellandes / W. S. Lepin, T. W. Jegorowa, S. B. Brandt. - Beitrag zur Klärung der Genese west- und mittelerzgebirigischer Granite anhand von SR-87/SR-86-Verhältnissen / H. Gerstenberger, G. Haase. - Zur geochronologisch-genetischen Modellierung von Granitoiden im Westerzgebirge und Vogtland / Th. Kaemmel. - Zur Abschätzung von Altersunterschieden innerhalb des Erzgebirgsplutons auf grund von Isotopenaltern / Th. Kaemmel. - Theoretische Aspekte zur radiogeochronologischen Datierung von Gesteinen und Mineralen / G. Christoph. - Die Verteilung der Strontium-90 und Cäsium-137 im Wasserkörper der Ostsee 1975-1982 / D. Weiß, E. Ettenhub
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  • 41
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    Call number: ZSP-201-83/13
    In: CRREL Report, 83-13
    Description / Table of Contents: A review on past experimental and theoretical work indicates a need for additional experimentation to characterize the response of snow to inelastic pressure waves. Pressure data from previously conducted explosion tests are analyzed to estimate the elastic limit of snow of 400 -kg/cu m density to be about 36 kPa. This pressure corresponds to a scaled distance of 1.6 m/cu.rt.kg for charges fired beneath the surface of the snow, and to a scaled distance of 1.2 m/cu.rt.kg for charges fired in the air. The effects of a snow cover on the method of clearing a minefield by using an explosive charge fired in the air above the snow surface are also discussed and recommendations are given for further work in this area. Explosive pressure data are used to estimate the maximum effective scaled radius for detonating buried mines at shallow depth to be 0.8 m/cu.rt.kg. Fuel-air explosive will increase this effective radius significantly because of the increase in the size of the source region.
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    Pages: 33 Seiten , Illustrationen
    Series Statement: CRREL Report 83-13
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Introduction Objectives Background Problems in describing the response of snow to an applied stress Methods of determining the dynamic behavior of materials Review of previous studies on snow Experimental measurements on snow Summary of snow experiments Theoretical studies Confirmation of the theory Discussion Applications Recommendations Summary Literature cited Appendix A. Selected data from Wisotski and Snyder (1966) Appendix B. Pressure data from Livingston (1964)
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  • 42
    Call number: ZSP-201-83/14
    In: CRREL Report, 83-14
    Description / Table of Contents: An analysis of ice fracture that incorporates dislocation mechanics and linear elastic fracture mechanics is discussed. The derived relationships predict a brittle to ductile transition in polycrystalline ice under tension with a Hall-Petch type dependence of brittle fracture strength on grain size. A uniaxial tensile testing technique, including specimen preparation and loading system design was developed and employed to verify the model. The tensile strength of ice in purely brittle fracture was found to vary with the square root of the reciprocal of grain size, supporting the relationship that the theory suggests. The inherent strength of the ice lattice and the Hall-Petch slope are evaluated and findings discussed in relation to previous results. Monitoring of acoustic emissions was incorporated in the tests, providing insights into the process of microfracture during ice deformation.
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    Pages: 43 Seiten , Illustrationen
    Series Statement: CRREL Report 83-14
    Language: English
    Note: CONTENTS Abstract Preface Introduction Background Development of testing technique Test specimens Tensile testing Compression testing Experimental results Tensile tests Compression tests Discussion Conclusions Suggestions for further work Literature cited Appendix A: Additional information on seed grains Appendix B: Thin-sectioning procedure Appendix C: Displacement transducer calibration
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  • 43
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    Call number: ZSP-201-83/16
    In: CRREL Report, 83-16
    Description / Table of Contents: The presence of snow on the ground can impose limitations on the mobility of wheeled and tracked vehicles. Snow depth and density are the two most easily measured snow properties that can be related to mobility over snow. Existing models of snowpack accumulation and ablation processes and models of internal snowpack structure were examined to determine if a model of the snowpack can be developed for use in predicting the snow parameters that affect mobility. Simple models, such as temperature index models, do not provide sufficient snowpack details, and the more detailed models require too many measured inputs. Components of the various models were selected from a basis of a snowpack model for predicting snow properties related to mobility over snow. Methods of obtaining the input data from some components are suggested, and areas where more development is needed are described.
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    Pages: 34 Seiten , Illustrationen
    Series Statement: CRREL Report 83-16
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Conversion of metric units Introduction Review of existing models Accumulation models Ablation models Using existing models for studying mobility Proposed snowpack model for mobility studies Model components Implementation of the model Developing input data Conclusions Literature cited
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  • 44
    Call number: ZSP-201-83/22
    In: CRREL Report, 83-22
    Description / Table of Contents: A new experimental method for measuring the soil-water diffusivity of frozen soil under isothermal conditions is introduced. The theoretical justification of the method is presented and the feasibility of the method is demonstrated by experiments conducted using marine-deposited clay. The measured values of the soil-water diffusivity are found comparable to reported experimental data.
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    Pages: 13 Seiten , Illustrationen
    Series Statement: CRREL Report 83-22
    Language: English
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  • 45
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    Call number: ZSP-201-83/23
    In: CRREL Report, 83-23
    Description / Table of Contents: The problems associated with measuring stresses in ice are reviewed. Theory and laboratory test results are then presented for a stiff cylindrical sensor made of steel that is designed to measure ice stresses in a biaxial stress field. Loading tests on freshwater and saline ice blocks containing the biaxial ice stress sensor indicate that the sensor has a resolution of 20 kPa and an accuracy of better than 15% under a variety of uniaxial and biaxial loading conditions. Principal stress directions can also be determined within 5 degrees. The biaxial ice stress sensor is not significantly affected by variations in the ice elastic modulus, ice creep or differential thermal expansion between the ice and gauge. The sensor also has a low temperature sensitivity (5 kPa/deg C).
    Type of Medium: Series available for loan
    Pages: 38 Seiten , Illustrationen
    Series Statement: CRREL Report 83-23
    Language: English
    Note: CONTENTS Abstract Preface Introduction Previous work Stress measurements Design considerations Stress sensors Biaxial ice stress sensor Biaxial stress sensor theory Gauge deformation Stresses associated with cylindrical sensors Determination of ice stresses Gauge calibration Evaluation of the biaxial ice stress sensor Temperature sensitivity Biaxial loading test equipment Biaxial loading test results Differential thermal expansion Long-term drift Discussion of test results Conclusions Literature cited
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  • 46
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    Call number: ZSP-201-83/11
    In: CRREL Report, 83-11
    Description / Table of Contents: Investigations of ground radar performance over thawed and seasonally frozen silts, and sands and gravels containing artificial and natural reflectors were carried out in Alaska. The radar emitted 5-10 ns pulses, the center frequency of which was approximately 150 MHz. The artificial reflectors were metal sheets and discs and the natural reflectors were the groundwater table and interfaces between frozen and thawed material. The water table was profiled at three sites where the subsurface material was coarse-grained alluvium. Dielectric constants of 16 to 18 were measured for the thawed silts, 6 to 7 for the frozen silts and 3 to 9 for the sands and gravels. Signal penetration in the thawed high moisture content silts may be achieved only by use of a lower frequency radar, whereas in the sands and gravels greater depths may be detected with more sophisticated signal processing.
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    Pages: 16 Seiten , Illustrationen
    Series Statement: CRREL Report 83-11
    Language: English
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  • 47
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    Call number: ZSP-201-83/25
    In: CRREL Report, 83-25
    Description / Table of Contents: Ice action on two cylindrical and conical structures, located side by side, was investigated in a small-scale experimental study to determine the interference on the ice forces generated during ice-structure interaction. The proximity of the two structures changes the mode of ice failure, the magnitude and direction of ice forces on the individual structure, and the dominant frequency of ice force variations. Interference effects were determined by comparing the experimental results of tests at different structure spacings.
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    Pages: 42 Seiten , Illustrationen
    Series Statement: CRREL Report 83-25
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Experimental setup and procedure Results and discussion Cylindrical structures Conical structures Conclusions Literature cited Appendix A: Relationship between flexural strength and in-situ unconfined compressive strength Appendix B: Test data
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  • 48
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    Call number: ZSP-201-83/17
    In: CRREL Report, 83-17
    Description / Table of Contents: A sea ice model was applied to the East Greenland Sea to examine a 60-day ice advance period beginning 1 October 1979. This investigation compares model results using driving geostrophic wind fields derived from three sources. Winds calculated from sea-level pressures obtained from the National Weather Service's operational analysis system resulted in strong velocities concentrated in a narrow band adjacent to the Greenland coast, with moderate velocities elsewhere. The model showed excessive ice transport and thickness build-ups in the coastal region. The extreme pressure gradient parallel to the coast resulted partially from a pressure reduction procedure that was applied to the terrain-following sigma coordinate system to obtain sea-level pressures. Additional sea-level pressure fields were obtained from an independent optimal interpolation analysis that merged FGGE buoys drifting in the Arctic basin with high latitude land stations and from manual digitization of the NWS hand-analyzed Northern Hemisphere Surface Charts. Modeling results using winds from both of these fields agreed favorably.
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    Pages: 19 Seiten , Illustrationen
    Series Statement: CRREL Report 83-17
    Language: English
    Note: CONTENTS Abstract Preface Introduction Description of study Model results The problem Conclusions Literature cited
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  • 49
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/26
    In: CRREL Report, 83-26
    Description / Table of Contents: Ice accreted on high-speed rotors operating in supercooled fog can be thrown off by centrifugal force, creating severe unbalance and dangerous projectiles. A simple force balance analysis indicates that the strength of accreted ice and its adhesive strength can be obtained by measuring the thickness of the accretion, the location of the separation, the rotor speed, and the density. Such an analysis was applied to field and laboratory observations of self-shedding events. The results agree reasonably well with other observations.
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    Pages: 13 Seiten , Illustrationen
    Series Statement: CRREL Report 83-26
    Language: English
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  • 50
    Call number: ZSP-201-83/24
    In: CRREL Report, 83-24
    Description / Table of Contents: Secondary recovery of oil at Prudhoe Bay, Alaska, will involve transporting large quantities of seawater in elevated pipelines across tundra for injection into oil-bearing rock strata. The possibility of a pipeline rupture raises questions concerning the effects of seawater on tundra vegetation and soils. To evaluate the relative sensitivities of different plant communities to seawater, eight sites representing the range of vegetation types along the pipeline route were treated with single, saturating applications of seawater during the summer of 1980. Within a month of the treatment 30 of 37 taxa of shrubs and forbs in the experimental plots developed clear symptoms of stress, while none of the 14 graminoid taxa showed apparent adverse affects. Live vascular plant cover was thus reduced by 89 and 91% in the two dry sites and by 54, 74 and 83% in the three moist sites, respectively. Live(green) bryophyte cover was markedly reduced in the moist experimental sites in 1981. Bryophytes in all but one of the wet-site experimental plots were apparently unaffected by the seawater treatment. Two species of foliose lichens treated with seawater showed marked deterioration in 1981. All other lichen taxa were apparently unaffected by the seawater treatment. The absorption and retention of salts by the soil is inversely related to the soil moisture regime. In the wet sites, conductivities approached prespill levels within about 30 days. In such sites, spills at the experimental volumes are quickly diluted and the salts flushed from the soil. In the dry sites, on the other hand, salts are retained in the soil, apparently concentrating at or near the seasonal thaw line.
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    Pages: 43 Seiten , Illustrationen
    Series Statement: CRREL Report 83-24
    Language: English
    Note: CONTENTS Abstract Preface Introduction Methods Site selection and preparation Prespill assessment Seawater application Postspill assessment Enzyme assay and analysis of soil flora Results and discussion Soil-solution conductivities Vascular plant response Cryptogam response Site factors and plant response Soil flora and extracellular soil enzymes Limitations of this study Summary and conclusions Literature cited Appendix: Plant taxa included in this study
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  • 51
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    Call number: ZSP-201-83/9
    In: CRREL Report, 83-9
    Description / Table of Contents: Recent observations of shore ice pile-up and ride-up along the coast of the Alaska Beaufort Sea are presented. Information is given to show that sea ice movement on shore has overridden steep coastal bluffs and has thrust inland over 150 m, gouging into and pushing up mounds of beach sand, gravel, boulders and peat and, inland, the tundra material. The resulting ice scar morphology was found to remain for tens of years. Onshore ice movements up to 20 m are relatively common, but those over 100 m are very infrequent. Spring is a dangerous time, when sea ice melts away from the shore, allowing ice to move freely. Under this condition, driving stresses of less than 100 kPa can push thick sea ice onto the land.
    Type of Medium: Series available for loan
    Pages: v, 59 Seiten , Illustrationen
    Series Statement: CRREL Report 83-9
    Language: English
    Note: Contents Abstract Preface Introduction Winter 1979-80 observations Winter 1980-81 and summer 1981 observations Winter 1981-82 and summer 1982 observations Old ice ride-up features Discussion Literature cited Appendix A. The boulder rampart and rock littered shore west of Konganevik Pt. Appendix B. Site location maps
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  • 52
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    Call number: ZSP-201-83/8
    In: CRREL Report, 83-8
    Description / Table of Contents: In the course of model tests with urea-doped ice in the CRREL Ice Engineering Facility test basin, the growth process and the physical and mechanical properties of the model ice were investigated. The parameters which were varied were: urea concentration in the tank water, air temperature during growth, growth duration, and tempering time. Uniformity of ice thickness and ice mechanical properties over the whole tank area were found to be satisfactory. The structure of the urea-doped ice was found to be similar to that of the ice except for a relatively thick incubation layer over a dendritic bottom layer. Empirical relationships were established between: ice thickness and negative degree-hours; mechanical properties and growth temperature, urea concentration, and ice thickness; and reduction in mechanical properties and tempting time. The results of the study are presented in charts which permit reliable scheduling of model tests with required ice thickness and ice flexural strength.
    Type of Medium: Series available for loan
    Pages: vii, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 83-8
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Experimental facility and procedures Ice test basin Ice growth procedure Measurements Ice growth and structure Ice thickness distribution Ice growth during freeze-up Ice growth during warm-up Structure of urea-doped ice Mechanical properties of urea-doped ice Introductory remarks Model of a two-layer elastic material Properties of urea-doped ice during freeze-up Properties of urea-doped ice during warm-up Applications to test program scheduling Summary and conclusions Literature cited Appendix A: Results of ice thickness measurements for various growth conditions Appendix B: Properties of untempered ice Appendix C: Properties of tempered ice
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  • 53
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    Call number: ZSP-201-83/6
    In: CRREL Report, 83-6
    Description / Table of Contents: During the austral summers of 1976-77 and 1978-79, several ice cores were taken from the McMurdo Ice Shelf brine zone to investigate its thermal, physical and chemical properties. This brine zone consists of a series of super-imposed brine layers (waves) that originate at the seaward edge of the ice shelf and migrate at various rates, depending upon their age and position in the ice shelf. The brine in these layers becomes increasingly concentrated as the waves migrate inland through the permeable ice shelf firn. Chemical analyses of brine samples from the youngest (uppermost) brine wave show that it contains sea salts in normal seawater proportions. Further inland, deeper and older brine layers, though highly saline (S 〉 200 ‰), are severely depleted in SO2-4 with the SO2-4/Na+ ratio being an order of magnitude less than that of normal seawater. Analyses of Na+, K+, Ca2+, Mg2+, SO2-4 and CI-, together with solubility and temperature considerations, show that the sulfate depletion is due to selective precipitation of mirabilite, Na2SO4*10H2O. The location of the inland boundary of brine penetration is closely related to the depth at which the brine en-counters the firn/ice transition. However, a small but measurable migration of brine is still occurring in otherwise impermeable ice; this is attributed to eutectic dissolution of the ice by concentrated brine as it moves into deeper and warmer parts of the McMurdo Ice Shelf.
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    Pages: iii, 16 Seiten , Illustrationen
    Series Statement: CRREL Report 83-6
    Language: English
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  • 54
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    Call number: ZSP-201-83/2
    In: CRREL Report, 83-2
    Description / Table of Contents: A numerical model of rime ice accretion on an arbitrary two-dimensional airfoil is presented. The physics of the model are described and results are presented that demonstrate, by comparison with other theoretical data and experimental data, that the model predictions are believable. Results are also presented that illustrate the capability of the model to handle time-dependent rime ice accretion, taking into account the feedback between the ice accretion and the airflow and droplet trajectory fields.
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    Pages: vi, 81 Seiten , Illustrationen
    Series Statement: CRREL Report 83-2
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Methodology Potential flow around an arbitrary airfoil Incompressible velocity field Droplet trajectory equation Computational procedure for trajectories Determining the point of impact Calculation of collision efficiencies Accreting an ice layer Determining the accuracy of the flow field Determining the accuracy of the trajectories Results and discussion Comparing results with and without the history term Collision efficiency of NACA 0015 airfoil at 8° attack angle Time-dependent accretion on NACA 0015 airfoil at 8° attack angle Time-dependent accretion on NACA 0015 airfoil at 0° attack angle Conclusions and recommendations Literature cited Appendix A : Sample input Appendix B: Sample output Appendix C : Program listing
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  • 55
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    Call number: ZSP-201-83/5
    In: CRREL Report, 83-5
    Description / Table of Contents: This report presents the results of dynamic ice-structure interaction model tests conducted at the CRREL Ice Engineering Facility. A flexible, single-pile, bottom-founded offshore structure was simulated by a test pile with about a one-to-ten scale ratio. Urea (instead of sodium chloride) was used as dopant to scale down the ice properties, resulting in good model ice properties. Six ice fields were frozen and 18 tests carried out. In all cases distinctive dynamic ice structure interaction vibrations appeared, from which abundant data were collected. In tests with linear ice velocity sweep, sawtooth-shaped ice force fluctuations occurred first. With increasing velocity the natural modes of the test pile were excited, and shifts from one mode to another occurred. The maximum ice force values appeared mostly with low loading rates, but high forces appeared random'y at high ice velocities. As a general trend, ice force maximums, averages and standard deviations decreased with increasing ice velocities. The aspect ratio effect of the ice force in continuous crushing follows the same dependence as in static loadings. The frequency of observed ice forces is strongly dominated by the natural modes of the structure. Dynamically unstable natural modes tend to make the developing ice force frequencies the same as the natural frequencies. Otherwise the resulting frequency depends directly on structural stiffness and ice velocity and inversely on the ice force range. During vibrations the displacement rates of the structure overcome the velocity of ice, making low loading rates and hence high ice forces possible. During crushing, ice induces both positive and negative damping.
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    Pages: iv, 53 Seiten , Illustrationen
    Series Statement: CRREL Report 83-5
    Language: English
    Note: CONTENTS Abstract Preface Introduction Test arrangements Ice properties Crushing patterns Maximum ice force vs velocity Dynamic aspect ratio effect and crushing strength Measured ice force frequencies Calculated ice force frequencies Accelerations, velocities and displacements Damping Ice-induced negative damping Limit cycles Buckling load Conclusions Literature cited
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  • 56
    Call number: ZSP-201-83/7
    In: CRREL Report, 83-7
    Description / Table of Contents: Peak power generation with hydropower creates tailwater flow conditions characterized by high and low flows with abrupt transitions between these states. Flows occurring in tailwaters typically form sharp-fronted, large-amplitude waves of relatively short period. An understanding of the mechanics of downstream propagation of these waves is important both for direct application in studies of the tailwater and because of the similarity of these waves to those following a dam break. An analysis of the dynamic equations of open channel flow is used to quantify the relative importance of flow wave convection, diffusion and dispersion in rivers. The relative importance of each process is re­lated to the relative magnitude of terms in the dynamic equations, providing a physical basis for model formulation. A one-dimensional diffusion wave flow routing model, modified for tailwaters, simulates the important physical pro­cesses affecting the flow and is straightforward to apply. The model is based upon a numerical solution of the kine­matic wave equation. The “modified equation,” Hirt, and von Neumann analyses are used to gain insight into the stability and dissipative and dispersive behavior of the numerical solution, and results of these analyses are compared. A set of linear routings is used to demonstrate the dissipative and dispersive behavior predicted by the analyses and to verify the accuracy of an expression that quantifies the numerical diffusion of the model. The analyses provide a basis for selection of numerical parameters for model applications. The capability and accuracy of the model are enhanced when physical wave diffusion is balanced by numerical diffusion in the model. Maintaining the diffusion balance re­quires that the time derivative weighting parameter 0 be variable and in some instances negative. Though some amount of phase error is introduced, negative 0 values have no adverse effect upon model stability. Field studies were con­ducted to demonstrate the benefits of careful model development and analysis, and to verify the diffusion wave model for rapidly varying tailwater flow. The bed slope and roughness characteristics of the field study reaches (below Apalachia and Norris Dams) differ greatly, spanning those of a large number of rivers of practical interest. The accurate simulation of flow in both of these tailwaters attests to the soundness of both the physical basis of the model and the numerical solution technique. The field studies confirm, for the extreme case of rapidly varying flow in a mildly sloped river, that inertia has a negligible effect upon unsteady flow waves at low Froude numbers. Additionally, these studies verify that diffusion of short-period waves in rivers is generally significant.
    Type of Medium: Series available for loan
    Pages: vi, 41 Seiten , Illustrationen
    Series Statement: CRREL Report 83-7
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Introduction Physical diffusion and dispersion in open channel flow Modeling approach Description of the diffusion wave flow routing model Analysis of the numerical model Modified equation and Hirt analyses of diffusion wave model von Neumann analysis of the diffusion wave model Linear case studies Accuracy considerations of the numerical solution Field studies Apalachia Dam tailwater Norris Dam tailwater Conclusions Literature cited
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  • 57
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    Call number: ZSP-201-76/29
    In: CRREL Report, 76-29
    Description / Table of Contents: In order to verify current theoretical equations on ice bearing capacity, a heavily loaded truck was used to make successive passes over two ice bridges. Equipment, weather and the normal problems associated with field work resulted in only one complete breakthrough test. Breakthrough occurred on one bridge with a vehicle weight of 53,630 lb (24,327 kg) and an ice thickness of 17.5 in. (44.5 cm). Since only one test was completed, the conclusions drawn cannot be unequivocal. However, the results do indicate that Nevel's equation for ultimate failure of a floating ice sheet is a good working tool.
    Type of Medium: Series available for loan
    Pages: iv, 19 Seiten , Illustrationen
    Series Statement: CRREL Report 76-29
    Language: English
    Note: Contents Abstract Preface Summary Introduction Location Test procedure Loading Site preparation and bridge construction Deflection measurements Conclusions Literature cited Appendix, Test data
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  • 58
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/43
    In: CRREL Report, 76-43
    Description / Table of Contents: Ice fog generated at the Eielson AFB power plant cooling pond contributes heavily to the total ice fog problem on the base. Several methods for ice fog suppression were studied and two techniques were tested experimentally. Experiments were also conducted to determine the magnitude of the various modes of heat transfer within the pond's microclimate. Values of evaporative and radiative heat loss during ice fog are presented. Ice cover is shown to be an effective ice fog suppression technique. Monomolecular films are also shown to be effective and offer some unique advantages, such as ease of application and low overall cost. The heat normally lost to evaporation must be dissipated by other means during suppression. With the ice cover technique this is accomplished by melting the ice cover. During suppression with monomolecular films, the heat must be dissipated by increasing radiative and convective losses. The simplicity of application of monomolecular films, along with their lower cost, combine to make this technique attractive; however, the lower pond temperatures and increased suppression effectiveness weigh heavily in favor of the ice-cover technique.
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    Pages: viii, 86 Seiten , Illustrationen
    Series Statement: CRREL Report 76-43
    Language: English
    Note: CONTENTS Abstract Preface List of symbols Conversion factors: U.S. customary to metric units of measurement Introduction Section I. Ice fog Section II. Evaporation Bowen's equation Evaporation equation Evaporation measurements during ice fog conditions Evaporation measurements at Eielson Power Plant cooling pond Data analysis Section Ill. Radiation during ice fog Brunt's equation Ångström equation Elsasser's equation Cloud cover Reflection Field experimental results Analysis of experimental results Radiation equations for ice fog Transmissivity of ice fog Radiation model Wind effect Summary Section IV. Convection Convective heat transfer theory Rotem and Claassen equation Kay's approach Russian approach Analysis Heat budget at the surface Conclusions Section V. Ice fog suppression techniques Fans Injection wells Latent heat storage Monomolecular films Use of heated water from the cooling pond Section VI. Latent heat storage experiments Freezing rates Cooling pond Ice building Ice growth rate -maximum system limitation Evaporation heat loss -maximum Realistic growth rate Ice building techniques Ice volume measurements Melting experiments Ice fog suppression considerations Experimental results Section VII. Recommendations and conclusions Hexadecanol studies Injection well suppression Latent heat storage suppression Comparison of approaches Measurements of evaporation Measurements of radiation loss Convective heat losses Ice fog suppression Selected bibliography Appendix A. Convective heat transfer coefficient from water to ice and from ice to air
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  • 59
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-76/46
    In: CRREL Report, 76-46
    Description / Table of Contents: The topological properties of 10 stream networks having moderate to well developed trellis drainage patterns have been compared with those expected in a topologically random population. Magnitude 4 subnetworks show a systematic departure from expectation which can be related to geological controls. A link type classification system was developed and a series of equations describing the probability of occurrence of link types in topologically random populations derived. Analysis of the link structure in the channel networks showed small but persistent deviations from expectation in the well developed trellis pattern streams. The general conclusion is that the topologically random model is a very useful standard with which to compare real channel networks.
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    Pages: vi, 54 Seiten , Illustrationen
    Series Statement: CRREL Report 76-46
    Language: English
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  • 60
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    Call number: ZSP-201-76/47
    In: CRREL Report, 76-47
    Description / Table of Contents: This report describes two mechanical ice-cutting systems for the removal of ice collars at the high pool level on the Poe Lock of the St. Marys Falls Canal at Sault Ste. Marie, Michigan. One system was a narrow-kerf (3.25-in.-wide) coal-cutting chain saw mounted on a bar, driven by a 65-hp wheeled trencher. The other system was a lumber-cutting chain saw mounted on a bar, driven by a 30-hp wheeled soil trencher which cut a 0.56-in.-wide kerf. The lumber-cutting saw's bar was too flexible and the desired cutting traverse speed was not met. The coal-cutting saw cut 6-ft-deep ice collars at traverse speeds of up to 10 ft/min and is acceptable. With a few modifications, the coal-cutting saw would be operational.
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    Pages: iii, 20 Seiten , Illustrationen
    Series Statement: CRREL Report 76-47
    Language: English
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  • 61
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    Call number: ZSP-201-76/36
    In: CRREL Report, 76-36
    Description / Table of Contents: In the past decade, various workers have investigated the use of high-frequency electromagnetic radiation for breaking and excavating rock and frozen ground. This report reviews the high-frequency dielectric properties of these materials, the physics of heating, and the existing literature on these subjects. The high-frequency dielectric properties of rocks and soils, and the absorption of energy by these materials, are mainly determined by their liquid water contents. Computer modeling was used to calculate absorption energy as a function of distance behind irradiated faces of earth materials. The resulting computations showed that most energy is absorbed in the first few centimeters of frozen ground and weak soils. However, in hard rocks of low water content, electromagnetic waves penetrate more deeply, and significant amounts of energy are also absorbed tens of centimeters behind the irradiated faces. Test results showed that electromagnetic rock breakage is feasible only for excavations in hard rock; test results from the use of electromagnetic radiation for excavating tunnels in weak rocks and frozen ground are not promising.
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    Pages: iii, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 76-36
    Language: English
    Note: CONTENTS Preface Introduction Sorption and desorption of organic contaminants Decontamination methods Aqueous cleaning methods Cleaning or rinsing with organic solvents Chemical neutralization methods Current protocols to decontaminate groundwater sampling devices Variations in methodology Special instructions for cleaning pumps Effectiveness of various decontamination methods Low-temperature considerations Conclusions Literature cited
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  • 62
    Call number: ZSP-201-76/37
    In: CRREL Report, 76-37
    Description / Table of Contents: Geophysical studies were conducted during September and October of 1975 in northern Maine to locate rock types suitable for construction purposes for the proposed Dickey-Lincoln School Dam Project. Simultaneous airborne magnetometer and VLF electrical resistivity surveys were performed over an area of approximately 920 km2 surrounding the confluence of the St. John and Allagash rivers. The resulting data were used to construct contour maps of apparent resistivity and of total magnetic intensity above the earth's background magnetic field. During the same time period, ground and multi-elevation surveys were performed over a special test sector of known geology. The ground and airborne study in the test sector aided in interpretation of the data by revealing a strong correlation between igneous geology, resistivity, and magnetic intensity. Lack of a similar correlation between resistivity and magnetic data in the remainder of the survey area suggested an absence of additional areas of igneous rocks. The multi-elevation survey of the test area indicated that changes in flight altitude, necessitated by the topographic relief encountered, would not seriously affect the regional resistivity patterns. Although there was no strong evidence of igneous rocks outside the test sector, suitable rock types may exist within the Dss geologic unit (cyclically bedded gray slate and sandstone) in the central part of the main survey area, where most of the high resistivity contours occur.
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    Pages: v, 24 Seiten , Illustrationen
    Series Statement: CRREL Report 76-37
    Language: English
    Note: CONTENTS Abstract Preface Summary Introduction Measurement techniques employed Ground Airborne Magnetometer survey Results Ground control study VLF survey Bedrock geology and resistivity Aeromagnetic survey results Conclusions Literature cited Appendix A. Theory of electromagnetic resistivity surveying Appendix B. Magnetic surveying
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  • 63
    Call number: AWI G6-18-91505
    Type of Medium: Dissertations
    Pages: 146 S. , Ill., graph. Darst.
    Language: English
    Note: Groningen, Univ., Diss., 1983 , CONTENTS: INTRODUCTION. - CHAPTER 1. ANALYTICAL AND PREPARATIVE TECHNIQUES. - 1.1. Introduction. - 1.2. Isotope mass spectrometry of H, O and C. - 1.2.1. 2H analysis of H2. - 1.2.2. 18O and 13C analysis of CO2. - 1.3. Preparation of H2 from H2O and organic compounds. - 1.3.1. Combustion and reduction system. - 1.3.1.1. Automated vacuum taps. - 1.3.1.2. Automated cold trap. - 1.3.1.3. Automated combustion. - 1.3.1,4, Membrane pump. - 1.3.2. Performance and results. - 1.3.2.1. H2O samples. - 1.3.2.1. Organic samples. - 1.4. Preparation of CO2 from H2O and organic compounds. - 1.4.1. Introduction. - 1.4.2. Review of the available methods for extracting oxygen. - 1.4.3. Sealed nickel tube pyrolysis. - 1.4.3.1. Principle. - 1.4.3.2. Realization. - 1.4.3.3. Technical details. - 1.4.3.4. Results and calibration. - 1.4.3.5. 18O analysis of some organic pounds 1.4.3.5. δ2H of hydrogen produced by the SNTP method. - 1.5. Preparation of carbon dioxide for 13C analysis. - 1.6. Separation of cellulose from wood and peat. - 1.6.1. Introduction. - 1.6.2. Separation of cellulose from wood. - 1.6.3. Separation of cellulose from peat. - 1.6.4 Nitration and drying of cellulose. - CHAPTER 2. 18O FRACTIONATION BETWEEN CO2 AND H2O. - 2.1. Introduction. - 2.2. 18O analysis of H2O. - 2.3. Equilibration with CO2. - 2.4. Mass spectrometric analyses. - 2.5. Results anddiscussion. - CHAPTER 3. FACTORS AFFECTING THE 2H/1H AND 18O/16O RATIO OF PLANT CELLULOSE. - 3.1. Survey of factors affecting the 2H/1H and 18O/16O ratio. - 3.2. Isotopic composition of precipitation. - 3.3. Leaf-water isotopic enrichment. - 3.3.1. Theoretical. - 3.3.2. Measurement of leaf-water enrichment. - 3.3.2.1. Trees. - 3.3.2.2. Bog plants. - 3.4. Biochemical fractionation. - CHAPTER 4. 2H, 18O AND 13C VARIATIONS IN TREE RINGS. - 4.1. Introduction. - 4.2. Methods and material. - 4.3. Results and discussion. - 4.3.1. Intra-ring variations. - 4.3.1.1. Late wood. - 4.3.1.2. Differences between early wood and late wood. - 4.3.2. Inter-ring variations. - CHAPTER 5. 2H, 18O AND 13C VARIATIONS IN PEAT. - 5.1. Introduction. - 5.2. δ2H, δ18O and δ13C values of bog plants. - 5.2.1. Material and method. - 5.2.2. δ18O and δ2H. - 5.2.3. δ13C 5.3. Engbertsdijksveen I. - 5.3. Introduction. - 5.3.2. Description of the local vegetational succession. - 5.3.3. Cellulose preparation. - 5.3.4. The δ2H and δ18O record. - 5.4. Engbertsdijksveen VII. - 5.4.1. Introduction. - 5.4.2. Description of the local vegetational succession. - 5.4.3. The δ2H and δ18O record. - 5.4.4. The δ13C record. - 5.5. Comparison between Engbertsdijksveen I and VII. - 5.6. Conclusions. - Appendix. - REFERENCES. - SUMMARY. - SAMENVATTING. - ACKNOWLEDGEMENTS.
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  • 64
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Call number: ZSP-201-83/1
    In: CRREL Report, 83-1
    Description / Table of Contents: Roof snow load case studies gathered throughout the United States over a three-year period are analyzed. The objective of the analysis is to determine a relationship between the snow load on the ground and the corresponding uniform snow load on flat and sloped roofs. The main parameters considered are the thermal characteristics of the roof, the roof slope and the exposure of the structure. Exposure has the strongest effect on the ratio of ground to roof snow loads. Comparisons are made with existing and proposed building codes and standards.
    Type of Medium: Series available for loan
    Pages: iv, 47 Seiten , Illustrationen
    Series Statement: CRREL Report 83-1
    Language: English
    Note: CONTENTS Abstract Preface Metric conversion table Introduction Data base Conversion factor Ground load effects Exposure effects Thermal effects Slope effects Expected value relationship Comparison with existing codes and standards Comparison with relationships proposed in new ANSI standard Summary and conclusions Literature cited Appendix A. Roof snow load case history reports Appendix B. Roofs in the snow load case study data base Appendix C. Ground and roof snow load data Appendix D. Conversion factors from the 1982 ANSI standard
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  • 65
    Call number: ZSP-201-76/24
    In: CRREL Report, 76-24
    Description / Table of Contents: Chemical analysis of surface snows and deeper ice core samples from Milcent, Greenland, indicates a marine origin for Na and Cl and a terrestrial origin for Al, Mn and V. Pre-1900 enrichment factors, based on average crustal composition, are high for Zn and Hg and appear to be related to their volatility. A comparison of pre-1900 and 1971-1973 concentrations of V and Hg shows no decided increase from industrial production; however, the abundance of Zn (relative to Al) increased three-fold during this time period. The chemical composition of ancient ice is extremely useful in interpreting modern aerosols.
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    Pages: ii, 6 Seiten , Illustrationen
    Series Statement: CRREL Report 76-24
    Language: English
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  • 66
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/25
    In: CRREL Report, 76-25
    Description / Table of Contents: The primary objective of this investigation was to compile baseline information pertaining to the ocean circulation, especially the extent and patterns of tidal currents and tidal flushing, in Cook Inlet, Alaska, utilizing aircraft and satellite imagery with corroborative ground truth data. LANDSAT-1 and NOAA-2 and -3 imagery provided repetitive, synoptic views of surface currents, water mass migration and sediment distribution during different seasons and tides. Color, color infrared and thermal infrared imagery acquired on 22 July 1972 with the NASA NP-3A aircraft were used to analyze currents, mixing patterns and sediment dispersion in selected areas. Temperature(C), salinity (0/00) and suspended sediment concentration (mg/l) data and hand-held photography were utilized as ground truth information in the interpretation of the aircraft and satellite imagery. Coriolis effect, semidiurnal tides and the Alaska current govern the estuary circulation. Clear, oceanic water enters the inlet on the southeast during flood tide, progresses northward along the east shore with minor lateral mixing, and remains a distinct water mass to the latitude of Kasilof-Ninilchik. South of the forelands, mixing with turbid inlet water becomes extensive. Turbid water moves south primarily along the north shore during ebb tide and a shear zone between the two water masses forms in mid-inlet south of Kalgin Island. Currents adjacent to and north of the forelands are complicated by tidal action, coastal configuration and bottom effects. Turbulence is greatest throughout the water column along the south shore and stratification is more pronounced in Kamishak and Kachemak Bays, especially when fresh water runoff is high.
    Type of Medium: Series available for loan
    Pages: ix, 92 Seiten , Illustrationen
    Series Statement: CRREL Report 76-25
    Language: English
    Note: CONTENTS Abstract Preface Summary Conversion factors: U.S. customary to metric (SI) units of measurement. Introduction Background Objectives Project history Approach Aircraft imagery LANDSAT-1 imagery NOAA-2 and -3 satellite imagery Ground truth data Imagery and ground truth data analysis Physical and cultural setting Geography Geology Climate Hydrology Local industry and population density Sources of estuarine pollution Results and discussion Coastal configuration Bathymetry Tides Asymmetry of tidal flow/duration across inlet Suspended sediment distribution and circulation Sea ice Tidal flushing characteristics Summary and conclusions Applications Recommendations Literature cited Appendix A. RS-14 infrared scanner imagery
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  • 67
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/28
    In: CRREL Report, 76-28
    Description / Table of Contents: Fourier transforms of selected ground-motion time histories from five underground high-explosive and nuclear detonations are used to define the transmission properties (Transfer functions) of three rock types. Absorption, a measure of a rock's energy dissipating characteristics, is expressed for each of the tests as a function of the frequency of transmission. Dispersion results from a variation in transmission velocity with frequency and is described for each test by a phase velocity spectrum. The transmission properties from one of the sites are used to predict a ground-motion time history at that site from another nuclear event. The potential use of Fourier techniques to make ground-motion predictions and to measure in-situ material properties is discussed.
    Type of Medium: Series available for loan
    Pages: vi, 91 Seiten , Illustrationen
    Series Statement: CRREL Report 76-28
    Language: English
    Note: Contents Section I: Introduction Section II: Analytical procedures 1. Fourier transforms 2. Basic transform properties 3. Transform techniques 4. The transfer function Section II: Parameter studies and program evaluations 1. Analytical parameter study 2. I-TRAIN evaluation 3. S-TRAIN evaluation Section IV: Data 1. DATEX I 2. DATEX II 3. STARMET 4. MINERAL LODE 5. HARD HAT and PILEDRIVER Section V: Analysis of transformed data 1. Absorption 2. Dispersion 3. Transfer function Section VI: Fourier synthesis Section VII: Discussion Literature cited Appendix A: The Fourier integral and series Appendix B: Subroutine FOURT used in analysis Appendix C: I-TRAIN and S-TRAIN programs
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  • 68
    Monograph available for loan
    Monograph available for loan
    Athens : Institute of Geological and Mining Research
    Call number: AWI G1-19-93055
    Type of Medium: Monograph available for loan
    Pages: 58 Seiten, 10 Blätter , Illustrationen
    Language: English
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  • 69
    Call number: ZSP-980-71
    In: 2nd Working Meeting "Radioisotope Application and Radiation Processing in Industry", Part 3, 98 to 155
    In: ZfI-Mitteilungen, Nr. 71
    Type of Medium: Series available for loan
    Pages: 368 Seiten , Illustrationen
    ISSN: 0323-8776
    Series Statement: ZfI-Mitteilungen 71
    Language: English
    Note: Contents of Part 3 P. Popp, J. Leonhardt: Characterization of coulometric and hypercoulometric ECD mode of operation D. Hinneburg, H.-J. Grosse, J. Leonhardt, P. Popp: Calculation of current-voltage characteristics of electron-capture detectors A.G. Rozno, V.V. Gromov: Study of volume electric charge in radioactive dielectrics by the method of "acoustic sounding" Iv. N. Pandev, M.G. Christova, St.D. Stefanov, N.V. Gentchev, St.T. Bakardjiev, D.T. Genov, Ch.D. Christov: Portable gamma-irradiator - modified model P. Hargittai, V. Stenger: Planning of dose-rate distribution of radiation fields by computer M. Remer: DOSKMF2 - A contribution to the computer-aided design of dose rate distributions A. Heger, H. Dorschner, W. Schumann, D. Pleul: Characterization of the radiation field and control of the optimal electron beam accelerator operation for industrial processes V. Prenerov, K. Shivarov, P. Ivanov: Programme for radiation protection by using portable defectoscopes in industrial building T. Geßner, K. Irmer: Nuclear radiation detectors using high resistivity neutron transmutation doped silicon H.-G. Könnecke, D. Luther: The influence of airing systems on the residence time in biological clarification plants J. Dermietzel, C. Wienhold, H. Grundmann, A. Staschok, J. Koch, E. Bordes: Tracer studies on carbon monoxide and carbon dioxide formation in liquid phase oxidation of p-xylene W. Smułek: Use of technical mixtures of carboxylic acids to the extraction of silver H. Förster: Determination of oxide film thickness on aluminium using 14-MeV neutron activation and BET method H. Jaskólska, L. Waliś, C. Janusz: Investigations of the monocrystallization process of neodymium doped YAG using radiotracers H. Wagler: Substoichiometric determination of Pd-II-traces with dithizone and problems of determination P. Tábor, L. Molnár, D. Nagymihá!yi: Radioisotope gauge for automatic control of cottonwool package H.-W. Thummel, G. Körner, D. Fritzsche: Compensation for thickness variations in determining the bulk material composition on conveyor belts using combined scatter-transmission and thickness measuring methods D. Fritzsche, W. Dolak: Radiometric determination of ash content of raw lignites M. Braune: A simplified mathematical model for scattered transmission of X-rays in raw brown coal P. S. Kamenov, E. I. Vapirev, S. I. Ormandjiev: A new type of nuclear weighing device for transporter belts W. Smulek, M. Borkowski: Separation of reduced molybdenum from fission products. The Mo - HN03 - HDEHP system J. Komosiński, M. Radwan: Selected problems of radioisotope technique for wear investigation of precise elements Dr. A. Várkonyi: The thin layer activation for industry G. Hartmann, P. Kulicke: Wear testing in power stations J. Kraś, Z. Banasik: The radioisotopes in wear investigation of combustion engines H.-D. Grohmann: Short-time measurements of wear on surface activated rails G.M. Ter-Akopian, E.A. Sokol, Fam Ngok Chyong, M.P. Ivanov, L.P. Chelnokov, V.I. Smirnov, V.A. Gorshkov: Neutron multiplicity detector for the study of rare nuclear decay events L. Gąsiorowski, P. Mroziński, K. Sobkowicz, F. Zrudelny: Implementation of Intel 8080 - based microcomputer system in the radioisotope measurements control instrumentation W. Birkholz, M. Steinert: Evaluation of autoradiograms using a microcomputer F. Myšák, M. Krejči, J. Hakl, E. Smrkovský: Study of boron diffusion in high temperature Ni-base alloys by means of solid state track detectors W. Birkholz, H.-Ch. Treutler, K. Freyer, M. Geisler, J. Dubnack: Autoradiography of gallium in silicon H.C. Treutler, K. Freyer: On quantitative autoradiography of semiconductor basic material A.S. Shtan': Radiation evaluation techniques and facilities used for quality assurance of fuel elements and fuel assemblies for nuclear power plants D. Babić, A. Šafranj, V. Marković: Radiation degradation of poly-propylene-molecular weight and melt viscosity change A. Ciszek: Modern irradiation processes equipment-accelerators and their applications G. Kummer: Identification of signals by means of the decision theory N.S. Batchvarov, I.D. Vankov, L.P. Dimitrov, Ch.D. Shukov, P.A. Pavlov: Betareflektometer SR-77
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  • 70
    Call number: AWI Bio-21-94346
    In: Bibliotheca diatomologica, 3
    Type of Medium: Monograph available for loan
    Pages: 386 Seiten
    ISBN: 3768213757
    Series Statement: Bibliotheca diatomologica 3
    Language: English
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  • 71
    Call number: AWI G5-98-0371
    In: SEPM short course, No. 10
    Type of Medium: Monograph available for loan
    Pages: Getrennte Zählung , Illustrationen , 30 cm
    Series Statement: SEPM short course 10
    Language: English
    Note: CONTENTS: Introduction / Michael A. Arthur. - Chapter 1: Stable isotopes of oxygen and carbon and their application to sedimentologic and paleoenvironmental problems / Thomas F. Anderson and Michael A. Arthur. - Chapter 2: Stable isotopes of sulfur, nitrogen and deuterium in recent marine environments / Ian R. Kaplan. - Chapter 3: Chemical diagenesis of carbonates: theory and application of trace element technique / Ján Veizer. - Chapter 4: The application of stable isotopes to studies of the origin of dolomite and to problems of diagenesis of clastic sediments / Lynton S. Land. - Bibliography.
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  • 72
    Call number: ZSP-168-9
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 36 S. : Kt.
    Series Statement: Berichte zur Polarforschung 9
    Language: English
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  • 73
    Call number: AWI G9-84-0295 ; AWI G9-84-0295(2. Ex.)
    Type of Medium: Monograph available for loan
    Pages: XXII, 697 Seiten , Illustrationen , 25,5 cm
    ISBN: 0858471175
    Language: English
    Note: CONTENTS: Preface. - Acknowledgements. - Sir Douglas Mawson. - Symposium Opening Ceremony. - The Mawson Lecture. - Symposium Topics. - 1. Precambrian East Antarctic Craton. - 2. East Antarctica-West Antarctica Boundary and the Ross Orogen, including Northern Victoria Land. - 3. Beacon Supergroup and Associated Igneous Rocks. - 4. West Antarctica. - 5. Scotia Arc and Antarctic Peninsula. - 6. Marine Geology. - 7. Antarctic Resources. - 8. Glacial Geology and Geomorphology. - 9. Crusta! Structure of Antarctica. - 10. Cenozoic Tectonics and Climatic Record-Onshore and Offshore Evidence. - 11. Antarctica in Gondwanaland. - 12. Plate Tectonics. - 13. Antarctic Meteorites. - 14. Subantarctic Islands. - 15. Cenozoic Igneous Activity. - I. Precambrian East Antarctic Craton. - The Precambrian Geological Evolution of the East Antarctic Metamorphic Shield: a Review / P.R. James and R.J. Tingey. - Geological History of the Archaean Napier Complex of Enderby Land / L.P. Black and P.R. James. - The Geology of the Fyfe Hills-Khmara Bay Region, Enderby Land / M.A. Sandiford and C.J.L. Wilson. - The Napier and Rayner Complexes of Enderby Land, Antarctica: Contrasting Styles of Metamorphism and Tectonism / D.J. Ellis. - Regional Geobarometry-Geothermometry and Metamorphic Evolution of Enderby Land, Antarctica / S.L. Harley. - Sm-Nd Isotopic Systematics of Enderby Land Granulites. Evidence for the Redistribution of Sm and Nd During Metamorphism (Abstract) / M. T. McCulloch and L.P. Black. - Geology and Petrology of Prince Olav Coast, East Antarctica / Y. Hiroi, K. Shiraishi, Y. Nakai, T. Kano and S. Yoshikura. - Tectonic Situation of Lützow-Holm Bay in East Antarctica and its significance in Gondwanaland / M. Yoshida and K. Kizaki. - Sapphirine-Garnet and Associated Parageneses in Antarctica / E.S. Grew. - A Review of the Tectonic and Metamorphic History of the Lützow-Holm Bay Region, East Antarctica / M. Yoshida, M. Suzuki, H. Shirahata, H. Kojima and K. Kizaki. - Spinels in Calc-silicate Rocks from the coast of Lützow-Holm Bay and surrounding areas (Abstract) / H. Matsueda, Y. Matsumoto and Y. Motoyoshi. - Petrochemical Study of Metamorphic Rocks in the Lützow-Holm Bay Area, East Antarctica (Abstract) / S. Kanisawa and K. Yanai. - Geology and Petrology of the Yamato Mountains / K. Shiraishi, M. Asami and Y. Ohta. - Geology and Petrology of the Belgica Mountains (Abstract) / H. Kojima, K. Yanai and T. Nishida. - Lead Isotopic Composition in Metamorphic Rocks from Skarvsnes, East Antarctica / H. Shirahata. - Sr-Isotopic Studies of some Intrusive Rocks in the Ahlmann Ridge and Annandagstoppane, Western Queen Maud Land, Antarctica / J.M. Barton Jr. and Y.E. Copperthwaite. - Preliminary Report on the Geochemistry and Petrology of some Igneous Rocks in the Ahlmanryggen and Giaeverryggen, Western Dronning Maud Land, Antarctica (Abstract) / J.R. Krynauw. - Petrology and Zircon Geochronology of Herring Island and Commonwealth Bay and Evidence for Gondwana Reconstruction / R.L. Oliver, J.A. Cooper and A .F. Truelove. - Manganese-Rich Chemical Sediments from Wilkes Land, Antarctica / l.R. Plimer and J.R Lovering. - A Reassessment of the Age of the Windmill Metamorphics, Casey Area / l.S. Williams, W. Compston, K.D. Collerson, P.A. Arriens and J.R Lovering. - Lithological and Sr-Nd Isotopic Relationships in the Vestfold Block: Implications for Archaean and Proterozoic Crustal Evolution in the East Antarctic / K.D. Collerson, E. Reid, D. Millar and M. T. McCulloch. - Structure, Fabric Development and Metamorphism in Archaean Gneisses of the Vestfold Hills, East Antarctica / A.J. Parker, P.R. James, R.L. Oliver and V. Mielnik. - 2. East Antarctica-West Antarctica Boundary and the Ross Orogen, including Northern Victoria Land. - A Review of the Ross Fold Belt of the Transantarctic Mountains as a Boundary Structure between East Antarctica and West Antarctica (Abstract) / G.E. Grikurov. - The East Antarctica-West Antarctica Boundary between the Ice Shelves: a Review / C. Craddock. - The Pre-Beacon Geology of Northern Victoria Land: a Review / J.D. Bradshaw and M. G. Laird. - The Sedimentology of the Robertson Bay Group, Northern Victoria Land / B. D. Field and R.H. Findlay. - Tectonic Significance of Deformations affecting the Robertson Bay Group and Associated Rocks, Northern Victoria Land, Antarctica / R.H. Findlay and B.D. Field. - Geology of the Daniels Range, Northern Victoria Land, Antarctica: a Preliminary Report / C. C. Plummer, R.S. Babcock, J. W. Sheraton, C.J.D. Adams and R.L. Oliver. - Geology of the Daniels Range Intrusive Complex Northern Victoria Land, Antarctica (Abstract) / R.S. Babcock, C.C. Plummer, J.S. Sheraton, C.J. Adams, R.L. Oliver. - Trends in Regional Metamorphism and Deformation in Northern Victoria Land, Antarctica / G. Kleinschmidt. - New Data on the Lower Palaeozoic Bowers Supergroup, Northern Victoria Land / M. G. Laird and J.D. Bradshaw. - Geosynclinal Sedimentation and Ross Orogeny in Northern Victoria Land (Abstract) / R. Tessensohn. - Age and Correlation of the Cambrian-Ordovician Bowers Supergroup, Northern Victoria Land / R.A. Cooper, J.B. Jago, A.J. Rowell and P. Braddock. - Post-Mindyallan Late Cambrian Trilobite Faunas from Antarctica (Abstract) / J.H. Shergold. - Post-Ross Orogeny Cratonisation of Northern Victoria Land / G. W. Grindley and P.J. Oliver. - Geochemistry, Petrography and Geochronology of the Cambro-Ordovician and Devonian-Carboniferous Granitoids of Northern Victoria Land, Antarctica / U. Vetter, N. W. Roland, H. Kreuzer, A. Hohndorf, H. Lenz and C. Besang. - Chemistry of Palaeozoic Granites of Northern Victoria Land (Abstract) / D. Wyborn. - Chemical Control on Stratigraphic Relations in Northern Victoria Land and Some Possible Relations with SE Australia (Abstract) / D. Wyborn. - Results of Palaeomagnetic Investigations in Northern Victoria Land, Antarctica / G. Delisle. - The Geology of Terra Nova Bay / D.N.B. Skinner. - The Petrology and Origin of Orbicular Tonalite from Western Taylor Valley, Southern Victoria Land, Antarctica / P.S. Dahl and D.R Palmer. - The Granites and Two Orogenies of Southern Victoria Land / D.N.B. Skinner. - A Re-interpretation of the Basement Granites, McMurdo Sound, Antarctica (Abstract) / R.H. Findlay. - Petrology and Geochemistry of the Queen Maud Batholith, Central Transantarctic Mountains, with Implications for the Ross Orogeny / S.G. Borg. - Type Locality of the Ackerman Formation, La Gorce Mountains, Antarctica / E. Stump. - The Structural Development of Selected Areas in the Pensacola Mountains (Abstract) / A. Frischbutter, W. Weber, J. Hojmann and H.J. Paech. - A Gcochronological Investigation of the Shackleton Range / R.J. Pankhurst, P.D. Marsh, P.D. Clarkson. - Tectonics and Relationships between Structural Stages in the Precambrian of the Shackleton Range, Western Margin of the East Antarctic Craton / J. Hojmann and H.J. Paech. - The Late Precambrian and Early Palaeozoic History of The Shackleton Range, Coats Land / P.D. Marsh. - Structure and Outline of Geologic History of the Southern Weddell Sea Basin / E.N. Kamenev and V.L. Ivanov. - Magnetic Studies of Upper Crusta! Structure in West Antarctica and the Boundary with East Antarctica / E.J. Jankowski, D.J. Drewry and J.C. Behrendt. - Crust and Upper Mantle Study of McMurdo Sound / L.D. McGinnis, D.D. Wilson, W.J. Burdelik and T.H. Larson. - 3. Beacon Supergroup and Associated Igneous Rocks. - The Beacon Supergroup of Northern Victoria Land, Antarctica / B.C. Walker. - Trace Fossils of the Permian-Triassic Takrouna Formation, Northern Victoria Land, Antarctica / J.M. Zawiskie, J. W. Collinson and W.R. Hammer. - Permian-Triassic Sedimentary Sequence in Northern Victoria Land, Antarctica / J. W. Collinson and N.R. Kemp. - Late Palaeozoic Glacigene Strata in Northern Victoria Land (Abstract) / B. C. McKelvey and B.C. Walker. - Deposition of the Weller Coal M
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  • 74
    Series available for loan
    Series available for loan
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Call number: ZSP-168-11
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 40 S. : Kt.
    Series Statement: Berichte zur Polarforschung 11
    Language: English
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  • 75
    Call number: ZSP-168-15
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: 59 S. : Kt.
    Series Statement: Berichte zur Polarforschung 15
    Language: English
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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-201-76/5
    In: CRREL Report, 76-5
    Description / Table of Contents: Griffith, and later Babel, have previously developed a tensile fracture criterion for a two-dimensional state of stress. This theory is extended to the compression-compression region. From this theory the angle of fracture is developed. The theory is extended conceptually to three dimensions. Triaxial test data by Haynes for snow-ice are shown in this three-dimensional fracture theory. The test data are slightly less than those predicted when the void in the snow-ice is spherical.
    Type of Medium: Series available for loan
    Pages: iii, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-5
    Language: English
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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-201-76/11
    In: CRREL Report, 76-11
    Description / Table of Contents: Water flow through the unsaturated portion of a snowpack is calculated using various assumptions about radiation penetration into the snow. The results show that for the purposes of hydrologic forecasting, it is sufficiently ac­curate to assume that all of the radiation absorption occurs at the surface. The error in the calculation of flow is largest for very shallow snowpacks, but this error is reduced by radiation absorption at the base of the snow and by the routing of meltwater through the saturated basal layer.
    Type of Medium: Series available for loan
    Pages: v, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-11
    Language: English
    Note: CONTENTS Abstract Preface Summary Conversion factors for U.S. customary and SI units Introduction Theory Examples Discussion Literature cited
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  • 78
    Call number: ZSP-553-10
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 28 S., 11 Beil.
    ISBN: 8717051118
    ISSN: 0106-1046
    Series Statement: Meddelelser om Grønland : Geoscience 10
    Language: English
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  • 79
    Call number: ZSP-553-11
    In: Meddelelser om Grønland
    Type of Medium: Monograph available for loan
    Pages: 24 S.
    ISBN: 8717051193
    ISSN: 0106-1046
    Series Statement: Meddelelser om Grønland : Geoscience 11
    Language: English
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  • 80
    Call number: ZSP-558
    In: Middle atmosphere program
    Type of Medium: Monograph available for loan
    Pages: 97 S.
    Series Statement: Middle atmosphere program
    Language: English
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  • 81
    Monograph available for loan
    Monograph available for loan
    Dordrecht [u.a.] : Kluwer
    Call number: M 99.0101 ; AWI G7-86-0694
    Description / Table of Contents: This book is designed as a comprehensive mathematical introduction to the science of the behaviour of glaciers and ice sheets in their geophysical environment. Its main objective is to provide a better fundamental understanding of the problems of ice mechanics and fluid mechanics of large ice masses, and to connect and unify some of the approaches that have been developed in different disciplines concerned with glaciers and ice sheets. The first two chapters provide the physical background by treating ice within the framework of continuum physics and material science. The central part of the book deals with the conceptualization and mathematical formulation of glacier and ice sheet flow. Considerations concerning fluid mechanics and thermodynamics are given equal attention. The aim is to deduce common glaciological formulae from first principles and to state clearly the assumptions which lie behind the approximations. This allows the extension of the results - known to glaciologists in plane flow only - to three dimensions, thus paving the way for further research.
    Type of Medium: Monograph available for loan
    Pages: xxxvii, 510 S.
    ISBN: 9027714738
    Series Statement: Mathematical approaches to geophysics
    Classification:
    Meteorology and Climatology
    Language: English
    Note: TABLE OF CONTENTS: ACKNOWLEDGEMENTS. - PREFACE. - INTRODUCTION. - SYMBOLS AND NOTATION. - PART I. FUNDAMENTAL PHYSICS AND MATERIALS TECHNOLOGY OF ICE. - 1.General Concepts. - 1. Introduction. - 2. Equations of Balance. - 3. Material Response. - (a) General constitutive relations, simple materials. - (b) The rule of material objectivity. - (c) Material symmetry. - (d) Constitutive response for isotropie bodies. - (e) Materials with bounded memory-some constitutive representations. - (f) Incompressibility. - (g) Some representations of isotropic functions. - 4. The Entropy Principle. - (a) The viscous heat-conducting compressible fluid. - (b) The viscous heat-conducting incompressible fluid. - (c) Pressure and extra stress as independent variables. - (d) Thermoelastic solid. - (e) Final remarks. - 5. Phase Changes. - (a) Phase changes for a viscous compressible heat-conducting fluid. - (b) Phase changes for a viscous incompressible heat-conducting fluid. - References. - 2. A Brief Summary of Constitutive Relations for Ice. - 1. Preliminary Remarks. - 2. The Mechanical Properties of Hexagonal Ice. - (a) The crystal structure of ordinary ice. - (b) The elastic behavior of hexagonal ice. - (c) The inelastic behavior of single-crystal ice. - 3. The Mechanical Properties of Polycrystalline Ice. - (a) The elastic behavior of polycrystalline ice. - (b) Linear viscoelastic properties of polycrystalline ice. - (α) General theory. - (β) Experimental results. - (c) Non-linear viscous deformation and creep. - (α) Results of creep tests. - (β) Generalization to a three-dimensional flow law. - (γ) Other flow laws. - 4. The Mechanical Properties of Sea Ice. - (a) The phase diagram of standard sea ice and its brine conten. - (b) Elastic properties. - (c) Other material properties. - References. - PART II. THE DEFORMATION OF AN ICE MASS UNDER ITS OWN WEIGHT. - 3. A Mathematical Ice-flow Model and its Application to Parallel-sided Ice Slabs. - 1. Motivation and Physical Description. - 2. The Basic Model - Its Field Equations and Boundary Conditions. - (a) The field equations. - (α) Cold ice region. - (β) Temperate ice region. - (b) Boundary conditions. - (α) At the free surface. - (β) Along the ice-water interface. - (γ) Along the bedrock surface. - (δ) Along the melting surface. - 3. The Response of a Parallel-sided Ice Slab to Steady Conditions. - (a) Dimensionless forms of the field equations. - (b) Parallel-sided ice slab, a first approximation to glacier and ice-shelf flow dynamics. - (α) Velocity and temperature fields x-independent. - (β) Extending and compressing flow. - (γ) Floating ice shelves 4. Concluding Remark. - References. - 4. Thermo-mechanical Response of Nearly Parallel-sided Ice Slabs Sliding over their Bed. - 1. Motivation. - 2. The Basic Boundary-value Problem and its Reduction to Linear Form. - 3. The Solution of the Boundary-value Problems. - (a) Zeroth-order problem. - (b) First-order problem. - (α) Harmonic perturbation from uniform flow for a zero accumulation rate. - (β) Analytic solution for a Newtonian fluid. - (γ) Numerical solution for non-linear rheology. - (δ) Effect of a steady accumulation rate. - (ε) A historical note on a previous approach. - (η) The first-order temperature problem. - (c) Numerical results for steady state. - (α) Transfer of bottom protuberances to the surface. - (β) Basal stresses. - (γ) Surface velocities. - (δ) Effect of a steady accumulation rate. - 4. Remarks on Response to a Time-dependent Accumulation Rate. - 5. Surface-wave Stability Analysis. - (a) The eigenvalue problem. - (b) Discussion of results. - 6. Final Remarks. - References. - 5. The Application of the Shallow-ice Approximation. - 1. Background and Previous Work. - 2. Derivation of the Basal Shear-stress Formula by Integrating the Momentum Equations over Ice Thickness. - (a) Derivation. - (b) The use of the basal shear-stress formula in applied glaciology. - 3. Solution of the Ice-flow Problem using the Shallow-ice Approximation. - (a) Governing equations. - (b) Shallow-ice approximation. - (c) Construction of the perturbation solution. - (d) Results. - (e) Temperature field. - 4. Theoretical Steady-state Profiles. - (a) Earlier theories and their limitations. - (b) Surface profiles determined by using the shallow-ice approximation. - 5. An Alternative Scaling - a Proper Analysis of Dynamics of Ice Sheets with Ice Divides. - (a) Finite-bed inclination. - (b) Small-bed inclination. - (c) Illustrations. - References. - 6. The Response of a Glacier or an Ice Sheet to Seasonal and Climatic Changes. - 1. Statement of the Problem. - 2. Development of the Kinematic Wave Theory. - (a) Full non-linear theory. - (b) Perturbation expansion-linear theory. - (c) An estimate for the coefficients C and D. - (d) Boundary and initial conditions. - 3. Theoretical Solutions for a Model Glacier. - (a) Solutions neglecting diffusion. - (b) Theoretical solutions for a diffusive model. - (α) Coefficient functions for the special model. - (β) Solution for a step function. - (γ) General solution for uniform accumulation rate. - (δ) The inverse problem - calculation of climate from variations of the snout. - 4. General Treatment for an Arbitrary Valley Glacier. - (a) Fourier analysis in time. - (α) Low-frequency response. - (β) High-frequency response. - (γ) Use of the results. - (b) Direct integration methods. - 5. Derivation of the Surface-wave Equation from First Principles Non-linear Theory. - (a) Surface waves in the shallow-ice approximation. - (α) Integration by the methods of characteristics. - (β) An illustrative example. - (γ) A remark on linearization. - (δ) Effects of diffusion. - (b) Remarks regarding time-dependent surface profiles in ice sheets. - (c) Long waves in an infinite ice slab - Is accounting for diffusion enough?. - (α) Basic equations. - (β) Construction of perturbation solutions. - (γ) Numerical results. - 6. Concluding Remarks. - References. - 7. Three-dimensional and Local Flow Effects in Glaciers and Ice Sheets. - 1. Introduction. - 2. Effect of Valley Sides on the Motion of a Glacier. - (a) Solutions in special cases. - (α) Exact solutions for the limiting cases. - (β) Solution for a slightly off-circular channel. - (γ) A note on very deep and wide channels. - (b) A useful result for symmetrical channels with no boundary slip. - (c) Numerical solution - discussion of results. - 3. Three-dimensional Flow Effects in Ice Sheets. - (a) Basic equations. - (b) Decoupling of the stress-velocity problem from the problem of surface profile. - (c) The equation describing the surface geometry. - (d) The margin conditions. - 4. Variational Principles. - (a) Fundamental variational theorem. - (b) Variational principle for velocities. - (c) Reciprocal variational theorem. - (d) Maximum and minimum principles. - (e) Adoption of the variational principles to ice problems. - 5. Discussion of Some Finite-element Solutions. - References. - Appendix: Detailed Calculations Pertaining to Higher-order Stresses in the Shallow-ice Approximation. - AUTHOR INDEX. - SUBJECT INDEX.
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  • 82
    Monograph available for loan
    Monograph available for loan
    Boulder, Colo. : The Geological Society of America
    Associated volumes
    Call number: AWI G2-17-91266
    In: Memoir / The Geological Society of America, 145
    Type of Medium: Monograph available for loan
    Pages: X, 464 S , graph. Darst., Kt , 1 Kt.-Beil., 3 Mikrofiches
    ISBN: 0813711452
    Series Statement: Memoir / The Geological Society of America 145
    Language: English
    Note: Contents: Preface. - ATLANTIC. - New transfer function for estimating past sea-surface conditions from sea-bed distribution of planktonic foraminiferal assemblages in the North Atlantic / Nilva G. Kipp. - Glacial North Atlantic 18,000 years ago: a CLIMAP reconstruction / Andrew Mclntyre and Nilva G. Kipp with Allen W. H. Bé, Thomas Crowley, Thomas Kellogg, James V. Gardner, Warren Prell, and William F. Ruddiman. - Late Quaternary climatic changes: Evidence from deep-sea cores of Norwegian and Greenland Seas / Thomas B. Kellogg. - Northeast Atlantic paleoclimatic changes over the past 600,000 years / W. F. Ruddiman and A. Mclntyre. - O18 record of the Atlantic Ocean for the entire Pleistocene Epoch / Jan van Donk. - Late Quaternary climatic record in western equatorial Atlantic sediment / Allan W. H. Bé, John E. Damuth, Leroy Lott, and Rosemary Free. - Late Pleistocene faunal and temperature patterns of the Colombia Basin, Caribbean Sea / Warren L. Prell and James D. Hays. - Responses of sea-surface temperature and circulation to global climatic change during the past 200,000 years in the eastern equatorial Atlantic Ocean / James V. Gardner and James D. Hays. - Equatorial Atlantic and Caribbean foraminiferal assemblages, temperatures, and circulation: Interglacial and glacial comparisons / Warren L. Prell, James V. Gardner, Allan W. H. Bé, and James D. Hays. - Corresponding patterns of contemporary pollen and vegetation in central North America / T. Webb III and J. H. McAndrews. - ANTARCTIC. - Relationship of radiolarian assemblages to sediment types and physical oceanography in the Atlantic and western Indian Ocean sectors of the Antarctic Ocean / Jose A. Lozano and James D. Hays. - Reconstruction of the Atlantic and western Indian Ocean sectors of the 18,000 B.P. Antarctic Ocean / James D. Hays, Jose A. Lozano, Nicholas Shackleton, and Grace Irving. - PACIFIC. - Late Quaternary sediment of the Panama Basin: Sedimentation rates, periodicities, and controls of carbonate and opal accumulation / Nicklas G. Pisias. - Late Quaternary accumulation rates of opal, quartz, organic carbon, and calcium carbonate in the Cascadia Basin area, northeast Pacific / G. Ross Heath, Ted C. Moore, Jr., and J. Paul Dauphin. - Glacial advance in the Gulf of Alaska area implied by ice-rafted material / Roland von Huene, Jim Crouch, and Edwin Larson. - Modern Pacific coccolith assemblages: Derivation and application to late Pleistocene paleotemperature analysis / Kurt R. Geitzenauer, Michael B. Roche, and Andrew Mclntyre. - Oxygen-isotope and paleomagnetic stratigraphy of Pacific core V28-239 late Pliocene to latest Pleistocene / N. J. Shackleton and N. D. Opdyke.
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  • 83
    Monograph available for loan
    Monograph available for loan
    [Erscheinungsort nicht ermittelbar] : Department of Science and Technology, Antarctic Division Australia
    Associated volumes
    Call number: AWI P2-86-0256
    In: Antarctic Telecommunications Guidance Manual, Volume 1
    Type of Medium: Monograph available for loan
    Pages: Diverse Seitenangaben (ca. 50 Seiten)
    Language: English
    Note: TABLE OF CONTENTS: Distribution List. - List of acronyms and abbreviations used. - Record of Amendments. - Foreword to 1st Edition. - Foreword to 2nd Edition. - HISTORY AND DEVELOPMENTS OF ANTARCTIC COMMUNICATIONS. - CONSIDERATION OF TELECOMMUNICATIONS BY SCAR AND ANTARCTIC TREATY CONSULTATIVE PARTIES. - OPERATION OF INDIVIDUAL NATIONS' NETWORKS. - Australia's Antarctic Communications. - Japan's Antarctic communications. - UK Antarctic communications. - US Antarctic communications. - ANTARCTIC TREATY RESOLUTIONS ON ANTARCTIC COMMUNICATIONS. - WMO RESOLUTIONS AND PRINCIPLES ON ANTARCTIC COMMUNICATIONS. - Introduction. - Engineering principles of the GTS. - Functions and responsibilities of Meteorological Telecommunications Centres. - Characteristics of the networks of the GTS. - Operational principles of the GTS. - The transmission of meteorological data an the GTS. - Collection and transmission of meteorological data. - Data processing. - Telecommunications system. - Weather reporting by traverse parties. - Automatic weather station in the Antarctic. - AIREP reports. - Mobile ship stations. - OTHER RELEVANT RECOMMENDATIONS AND RESOLUTIONS. - APPENDIXES. - APPENDIX I. - Manual an the Global Data Processing System, Regional Aspects, the Antarctic. - APPENDIX II. - Network of CLIMAT and CLIMAT TEMP reporting stations in the Antarctic. - APPENDIX III. - Results of the monitoring of Antarctic data reception carried out during the period 12-15 March 1982. - APPENDIX IV. - Existing links for the daily international exchange of meteorological data within the Antarctic. - APPENDIX V. - Principal routes by which Antarctic meteorological data enters the GTS. - APPENDIX VI. - List of Antarctic stations and the routing of their meteorological data to the GTS.
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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-201-76/26
    In: CRREL Report, 76-26
    Description / Table of Contents: Debris over a 44-mile stretch of the Chena River was studied. The study area extended from the first bridge on the Chena Hot Springs Road to the Chena River Flood Control damsite. The purpose of the study was to assess the potential danger to the Chena River Flood Control Dam outlet structure. Debris was catalogued, log jams were measured, and sources of debris were studied. The average size of logs was determined, as well as the number of logs present on the river. The authors concluded that a serious debris problem existed and would remain serious for the foreseeable future. Recommendations for debris handling were made.
    Type of Medium: Series available for loan
    Pages: iv, 17 Seiten , Illustrationen
    Series Statement: CRREL Report 76-26
    Language: English
    Note: Contents Abstract Preface Summary Introduction Origin of debris Volume, magnitude Types of debris Hazards of the debris Recommended measures to counteract log jamming Conclusions and recommendations Future work Epilogue Selected bibliography Appendix: Additional photographs of Chena River debris
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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-201-76/27
    In: CRREL Report, 76-27
    Description / Table of Contents: In Part I a physically based model was used to predict daily snowmelt on 2000 m sq plots in the Subarctic. The plots had a range of aspects and inclinations in boreal forest and on the tundra. The energy balance, computed for each of the plots, was compensated for differences in radiative and turbulent energy fluxes caused by varied slope geometry and vegetative cover. The turbulent energy fluxes were also corrected for the effects of the stable stratification of the air over the snow surface. The predictions of the model were compared with daily melts derived from runoff measured on the snowmelt plots. The results show that the method is a good predictor of daily amounts of snowmelt, although some uncertainties are introduced by changes in the snow surface during the melt period. In Part II, a physically based model of the movement of water through snowpacks was used to calculate hydrographs generated by diurnal waves of snowmelt on the tundra and in the boreal forest of subarctic Labrador. The model was tested against measured hydrographs from hillside plots that sampled a range of aspect, gradient, length, vegetative cover, and snow depth and density. The model yielded good results, particularly in the prediction of peak runoff rates, though there was a slight overestimate of the lag time. A comparison of predictions against field measurements indicated that, given the ranges over which each of the controls is likely to vary, the two most critical factors controlling the hydrograph are the snow depth and the melt rate, which must be predicted precisely for short intervals of time. Permeability of the snowpack is another important control, but it can be estimated closely from published values.
    Type of Medium: Series available for loan
    Pages: ix, 40 Seiten , Illustrationen
    Series Statement: CRREL Report 76-27
    Language: English
    Note: Contents: Abstract Preface Summary Notation Scope of the study Part I. Energy balance computations Introduction The experimental sites Instrumentation Theoretical Radiation heat flow Hr Sensible heat flux Hc and latent heat flux He The application of the heat flow model Results and discussion Conclusions and recommendations Part II. Comparison of water runoff computations and measurements Introduction The runoff model The unsaturated zone The saturated layer The field study Instrumentation of the plots Descriptive hydrology Application of the runoff model The unsaturated zone The saturated zone Discussion and conclusions Comparison of predicted and observed hydrographs Factors affecting results Literature cited
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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-201-76/41
    In: CRREL Report, 76-41
    Description / Table of Contents: Eight Geoceiver stations were established and suitably marked along or near the crestiline of the Greenland ice sheet during GISP field operations from 1971 to 1975. At one of these stations, DYE-3, repeated Geoceiver positions indicate an ice velocity of 12.7 m.yr on an azimuth of approximately 60 degrees. Data from the International Greenland Glaciological Expedition (EGIG) surveys show that ice flow in the vicinity of Crete is radiating outward from a dome to the south. Two independent calculations of the state of equilibrium at Crete indicate ice sheet thinning rates of 0.25 to 0.37 m/yr, while direct measurement of elevation change by EGIG indicates an ice sheet thickening rate of difference of 0.06 m/yr. Resolution of these differences must await further geophysical work and deep drilling in the ice sheet.
    Type of Medium: Series available for loan
    Pages: iii, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 76-41
    Language: English
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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-201-76/44
    In: CRREL Report, 76-44
    Description / Table of Contents: The deformation of wet snow is explained in terms of the thermodynamics of the three phases of water. When deformation by particle rearrangement is fully developed, deformation can occur most rapidly by melting at the particle contacts. The rate of deformation is highly sensitive to the liquid water content, ionic impurity content, particle contact area, and stress level. A model of the hydrostatic deformation of wet snow is constructed, and examples of the deformation of wet snow are given for a variety of conditions. These results are in agreement with existing experimental evidence. The model accurately simulates the transient nature of the deformation and the effect of water content on the quasi-stable density of wet snow subjected to a constant stress.
    Type of Medium: Series available for loan
    Pages: iv, 9 Seiten , Illustrationen
    Series Statement: CRREL Report 76-44
    Language: English
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  • 88
    Call number: ZSP-201-83/21
    In: CRREL Report, 83-21
    Description / Table of Contents: The probability density function of the gouge depths into the sediment is represented by a simple negative exponential over four decades of gouge frequency. The exceedance probability function is, therefore, e to the -lambda d, where d is the gouge depth in meters and lambda is a constant. The value of lambda shows a general decrease with increasing water depth, from 9/m in shallow water to less than 3/m in water 30 to 35 m deep. The deepest gouge observed was 3.6 m, from a sample of 20,354 gouges that have depths greater than or equal to 0.2 m. The dominant gouge orientations are usually unimodal and reasonably clustered, with the most frequent alignments roughly parallel to the general trend to the coastline. The value of N(bar) sub 1, the mean number of gouges (deeper than 0.2 m) per kilometer measured normal to the trend of the gouges, varies from 0.2 for protected lagoons to 80 in water between 20 and 38 m deep in unprotected offshore regions. The distribution of the spacings between gouges as measured along a sampling track is a negative exponential. The form of the frequency distribution of N sub 1 varies with water depth and is exponential for lagoons and shallow offshore areas, previously skewed for 10 to 20 m depths off the barrier islands, and near-normal for deeper water. As a Poisson distribution gives a reasonable fit to the N sub 1 distributions for all water depths, it is suggested that gouging can be taken as approximating a Poisson process in both space and time. The distributions of the largest values per kilometer of gouge depths, gouge widths, and the heights of the lateral embankment of sediments plowed from the gouges are also investigated.
    Type of Medium: Series available for loan
    Pages: 40 Seiten , Illustrationen, 1 Karte
    Series Statement: CRREL Report 83-21
    Language: English
    Note: CONTENTS Abstract Preface Introduction Background and environmental setting Data collection and terminology Data analysis Gouge depths Gouge orientation Gouge frequency Extreme value analysis Applications to offshore design Gouge depth Extreme value statistics Burial depths Conclusion Literature cited Appendix A: Detailed bathymetric map of the Alaskan portion of the Beaufort Sea
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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-201-83/19
    In: CRREL Report, 83-19
    Description / Table of Contents: Small-scale laboratory experiments were conducted on model bridge piers in the CRREL test basin. The experiments were performed by pushing model ice sheets against structures and monitoring the ice forces during the ice/structure interaction. The parameters, varied during the test program, were the geometry of the bridge piers and the velocity, thickness, and flexural strength of the ice. The results are presented in the form of ice forces on sloping and vertical structures with different geometries. During ice action on sloping structures, a phenomenon of transition of failure mode from bending to crushing was observed as the ice velocity was steadily increased.
    Type of Medium: Series available for loan
    Pages: 17 Seiten , Illustrationen
    Series Statement: CRREL Report 83-19
    Language: English
    Note: CONTENTS Abstract Preface Introduction Tests Results Ice forces on inclined structures Transition of ice action due to velocity increase Aspect ratio Bridge pier nose geometry Conclusions Literature cited
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  • 90
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    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/32
    In: CRREL Report, 76-31
    Description / Table of Contents: Four large grounded multi-year shear ridge formations were found in the grounded ice subzone of the fast ice zone near the Harrison Bay/Prudhoe Bay area of Alaska. A 166-m-long cross section of one of these formations was obtained by leveling and sonar measurements. These measurements revealed that the maximum ridge height was 12.6 m and that the formation was grounded in 17-18 m of water. The salinity, temperature, brine volume and density of the ice were determined on samples obtained by coring. The physical characteristics of the formations as observed in satellite, SLAR and aerial imagery indicate that these formations have not moved between the time of their formation in the fall of 1974 and August of 1976. Evidence of significant aeolian debris discoloring the ice is discussed.
    Type of Medium: Series available for loan
    Pages: iv, 27 Seiten , Illustrationen
    Series Statement: CRREL Report 76-32
    Language: English
    Note: Contents Abstract Preface Introduction Background Fast ice study area Results and discussion Literature cited
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  • 91
    Call number: ZSP-201-76/31
    In: CRREL Report, 76-31
    Description / Table of Contents: Sections in the Connecticut River where ice jam potential is high were identified through the use of low-altitude black and white photographs taken during low-flow, ice-free conditions. The hydraulics and mechanics of ice jam initiation were investigated in the river reach where these sections were identified. Certain areas were found in the river that had a high susceptibility to ice clogging, but this high potential decreased with increasing discharge because of the improved surface conveyance of the ice through the reach. The stability of ice floes was established along the channel, but the floes generally became unstable as the flow increased. This was calculated by using a Froude number criterion. Grounding locations for ice became evident when the critical Froude number was zero for a given thickness and water depth. No single factor was determined to be responsible for initiating the ice jams in the Connecticut River at Windsor. Apparently there existed a multitude of interacting conditions: surface constrictions, possible high backwater conditions from the Brattleboro Dam, a solid ice cover in the backwater of the Brattleboro Dam that prevented ice transport from the Windsor area, deep pools followed by shallow depth sections upstream of bridge piers, a greater ice thickness accumulation of fragmented floes than would result if a uniform cover could be established in the same reach, and the diurnal fluctuation of river stage casued by the release of water at Wilder Dam.
    Type of Medium: Series available for loan
    Pages: vi, 39 Seiten , Illustrationen
    Series Statement: CRREL Report 76-31
    Language: English
    Note: CONTENTS Abstract Preface Summary Conversion factors: U.S. customary to metric units of measurement Introduction Testsite Aerial photography Channel morphology — Interpretation of aerial photographs Ground surveys Hydraulic analysis Analysis of ice jam locations Winter field observations Conclusions Literature cited Appendix: Locations and plots of cross sections from Sumner Falls to Chase Island, Connecticut River
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  • 92
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/34
    In: CRREL Report, 76-34
    Description / Table of Contents: Some physical characteristics of two grounded floebergs (fragments of multi-year pressure ridges) near Prudhoe Bay, Alaska, are described. Cross-sectional profiles of the sails and keels of both floebergs were obtained. A sail to keel ratio of 1 to 3.38 obtained with one floeberg was found to be in good agreement with previous investigations. A survey of the sea floor for evidence of scoring induced during grounding yielded a maximum depth of gouging of 1.1m. Additional studies included investigations of the internal structure of the floebergs, and a brief examination of the organic and sedimentary debris found entrained within the floebergs. The grounding of ice on the continental shelves of the Arctic is of considerable interest to those concerned with the development and impact of development of these continental shelves. The field study reported here provides information useful in assessing the nature and characteristics of interactions between floebergs and the sea bed on which they are grounded.
    Type of Medium: Series available for loan
    Pages: iii, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 76-34
    Language: English
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  • 93
    Call number: ZSP-201-76/33
    In: CRREL Report, 76-33
    In: Detecting structural heat losses with mobile infrared thermography / R.H. Munis, S.J. Marshall and M.A. Bush, Part IV
    Description / Table of Contents: During the winter of 1973-74 a mobile infrared thermography system was used to survey campus buildings at Dartmouth College, Hanover, New Hampshire. Both qualitative and quantitative data are presented regarding heat flow through a small area of a wall of one brick dormitory building before and after installation of aluminum reflectors between radiators and the wall. These data were used to estimate annual cost savings for 22 buildings of similar construction having aluminum reflectors installed behind 1100 radiators. The data were then compared with the actual savings which were calculated from condensate meter data. The discrepancy between estimated and actual annual cost savings is explained in detail along with all assumptions required for these calculations.
    Type of Medium: Series available for loan
    Pages: iii, 14 Seiten , Illustrationen
    Series Statement: CRREL Report 76-33
    Language: English
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  • 94
    Call number: ZSP-201-76/35
    In: CRREL Report, 76-35
    Description / Table of Contents: Crystalline textures and fabrics of ice cores from the 2164-m-thick ice sheet at Byrd Station, Antarctica, reveal the existence of an anisotropic ice sheet. A gradual but persistent increase in the c-axis preferred orientation of the ice crystals was observed between the surface and 1200m. This progressive growth of an oriented crystal fabric is accompanied by a 20-fold increase in crystal sized between 56 and 600m, followed by virtually no change in crystal size between 6000 and 1200m. A broad vertical clustering of c-axes develops by 1200m. Between 1200 and 1300 m the structure transforms into a fine-grained mosaic of crystals with their basal glide planes now oriented substantially within the horizontal. This highly oriented fine-grained structure, which persists to 1800m, is compatible only with a strong horizontal shear deformation in this part of the ice sheet. Rapid transformation from single- to multiple-maximum fabrics occurs below 1800m. This transformation, accompanied by the growth of very large crystals, is attributed to the overriding effect of relatively high temperatures in the bottom layers of old ice at Byrd Station rather than to a significant decrease in stress. The zone of single-maximum fabrics between 1200 and 1800 m also contains numerous layers of volcanic dust. Fabrics of the very fine-grained ice associated with these dust bands indicate the bands are actively associated with shearing in the ice sheet. Some slipping of ice along the bedrock seems likely at Byrd Station, since the basal ice is at the pressure melting point and liquid water is known to exist at the ice/rock interface.
    Type of Medium: Series available for loan
    Pages: v, 30 Seiten , Illustrationen
    Series Statement: CRREL Report 76-35
    Language: English
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  • 95
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/42
    In: CRREL Report, 76-42
    Description / Table of Contents: A study of arching of mixed, square fragmented ice floes at an opening in an ice boom is documented, using results from a model study in which two sizes of plastic blocks represented real ice. A power function, relating the upstream ice concentration to the ratio of a characteristic block dimension to the gap opening, is found adequate to distinguish between arching and nonarching events for block mixtures of two component sizes. It is demonstrated that when the respective total areas of the two block components are nearly equal, a minimum ice concentration initiates an arch across the opening. As the mixture of two sizes of blocks approaches a uniform (one-sized) mixture, a higher concentration of ice is needed to initiate the arch. When the ratio of the block dimension to the gap opening is equal to or less than 0.10, arching of the fragmented ice is not possible, even when the upstream ice discharge exceeds the maximum discharge of ice through a gap opening. The distribution of fragmented ice areas is an important parameter in establishing the minimum size of opening at which an ice boom will retain its arching capability.
    Type of Medium: Series available for loan
    Pages: iv, 17 Seiten , Illustrationen
    Series Statement: CRREL Report 76-42
    Language: English
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  • 96
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/45
    In: CRREL Report, 76-45
    Description / Table of Contents: The maneuverability of air cushion vehicles can become a serious operational problem when the vehicle's travel route is restricted by obstacles, slopes or cross-wind conditions, or when close-quarter turns are required. While improvement and perfection of aerodynamic methods may be a more desirable approach, there is a practical limit to these methods, and the use of ground contact devices requires consideration for providing more positive directional control. Wheels deserve special attention, and therefore are analyzed in more detail because of their obvious application on a variety of land terrains. Brake rods and harrows are more suitable on water, ice and snow. The saucer-shaped ground contact device would cause the least ecological impact on fragile organic terrains such as tundra. Relative directional stability is evaluated in terms of the total yawing moments produced by wheel arrangements (single, dual, tandem), location on the vehicle, and operational modes (free-rolling, braked, or a combination of the two). The available moments are plotted against the yaw angle of the vehicle to determine the most effective operational mode with a particular wheel arrangement for any yaw condition. The analysis is limited to retractable devices which act as moment producing brakes or rollers and do not serve as either propulsion or load support aids. Controlled ground contract with skirt sections having special wearing surfaces may provide a suitable control method and would require the least significant change to the basic design of the vehicle or its components. The concept involves the use of an air flow control mechanism for deflating specific skirt sections.
    Type of Medium: Series available for loan
    Pages: vii, 15 Seiten , Illustrationen
    Series Statement: CRREL Report 76-45
    Language: English
    Note: CONTENTS Abstract Preface Nomenclature Conversion factors: U.S. customary to metric (SI) units of measurement Section I: Use of auxiliary devices for ACV control Introduction Discussion of wheels as a control device Dual wheels Single wheel Tandem wheels Application to existing ACV’s Other control devices Turning force Conclusions Section II: Use of flexible skirts for ACV control Introduction The flexible skirt as a control device Model tests Conclusions Literature cited
    Location: AWI Archive
    Branch Library: AWI Library
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  • 97
    Series available for loan
    Series available for loan
    Fairbanks, Alaska : Division of Geological & Geophysical Surveys, Dept. of Natural Resources, State of Alaska
    Call number: AWI G3-22-94974
    Type of Medium: Series available for loan
    Pages: x, 230 Seiten , Illustrationen , 28 cm
    Series Statement: Guidebook / Division of Geological & Geophysical Surveys, Department of Natural Resources, State of Alaska 4
    Language: English
    Note: CONTENTS Introduction History and development along the Elliott and Dalton Highways Elliott Highway Hickel Highway Dalton Highway Trans-Alaska Pipeline System Climate Temperature Precipitation Physiography Permafrost and ground ice Hydrology Icings Pingos Geology Bedrock geology Glacial geology of the Brooks Range Vegetation Bottomland spruce-poplar forest Upland spruce-hardwood forest Lowland spruce-hardwood forest High shrub Low shrub bogs Moist tundra Wet tundra Alpine tundra Disturbance patterns Flora Soils Road log Introduction Fox Fox - Livengood Livengood Livengood - Yukon River Yukon River region and crossing Yukon River - Atigun Pass Cirque glaciation and processes in the Atigun Pass area Slushflow activity in the Atigun Pass area Atigun Valley - Prudhoe Bay The Prudhoe Bay region Oil-field development Geology Geomorphology. soils, and vegetation Selected references Appendix A - Soil taxonomy Appendix B - List of plants
    Location: AWI Reading room
    Branch Library: AWI Library
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