ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Books  (26)
  • Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory  (25)
  • Hannover, NH : U.S. Army Cold Regions Research and Engineering Laboratory  (1)
Collection
  • Books  (26)
Source
Publisher
Language
Years
Branch Library
Reading Room Location
  • 1
    Series available for loan
    Series available for loan
    Phase boundary water in frozen soils (1970)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-274
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - The ice/ice interface. - The ice/air interface. - The silicate/water/silicate interface. - The silicate/water/ice interface. - Summary. - Literature cited. - Abstract.
    Description / Table of Contents: Interfacial regions in frozen soils are of the following types: ice/ice (grain boundary) ice/water/air, silicate/water/silicate (interlamellar) and silicate/water /ice (extralamellar). For the last, the mid-portion of the interfacial region should be regarded as a liquid-like solution of the ionic and undissociated substances sorbed by the interface and expelled from the ice during freezing. The interfacial forces operative in these regions result in distinct differences in the properties and behavior of the interfacial water, compared with water in bulk; but, in spite of strong interfacial forces, the interfacial water exhibits liquid-like mobility in its response to many kinds of driving forces. From the evidence and arguments considered, it is concluded that distinctly different zones of orientational order can be distinguished within the interfacial regions. For an advancing silicate/water/ice interface it is proposed that there is a zone of strong perturbation and disorder immediately proximate to silicate surfaces in which the protons of water molecules are partially delocalized; this makes them more easily dissociated. Two or three molecular diameters removed from the silicate surface the interfacial forces operative there combine to create a zone of enhanced order in the molecular configurations. At some farther distance, depending upon the temperature below freezing, it is suggested that there exists a disordered transition zone proximate to the ice surface as portrayed in Drost-Hansen's model. It is suggested that future investigations will contribute refinements in the model and will uncover still further complexities in the various interfaces mentioned.
    Type of Medium: Series available for loan
    Pages: iii, 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 274
    URL: http://www.worldcat.org/oclc/5973960
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 2
    Series available for loan
    Series available for loan
    Shock effects on frozen materials : exploding wire experiments (1970)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-287
    In: Research report
    Description / Table of Contents: Hugoniot curves were generated from simultaneous measurements of shock and free-surface velocities, obtained from samples of frozen Fairbanks (Fox) silt, using the exploding wire technique. The abrupt change in slope of the Us-Up Hugoniot is indicative of a phase change. The shape of the P-V Hugoniot suggests that the transformation begins immediately but does not go to completion. This means that, although the pressure lies slightly above the Rayleigh line through the mixed phase region, the slope does not increase as rapidly as it would if the material had stayed in the initial phase.
    Description / Table of Contents: CONTENTS: Preface. - Conversion factors. - Introduction. - Test procedure. - Test results. - Discussion. - Literature cited. - Appendix A: Hugoniot data. - Abstract.
    Type of Medium: Series available for loan
    Pages: iv, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 287
    URL: http://www.worldcat.org/oclc/5974609
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 3
    Series available for loan
    Series available for loan
    Internal friction of single-crystal ice (1973)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-243
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 243
    Description / Table of Contents: The internal friction of single-crystal ice has been attributed to reorientation of the water molecule under periodic stress. However, the theory for damped dislocations, which offers another mechanism for the internal friction of ice, has not been investigated. The effects of scratching the surface of 41 ice samples and X-irradiating and plastically deforming them were evaluated. The effects observed on the internal friction of pure, single-crystal ice, in the flexure mode of oscillation between 400 and 1400 Hz, supported the existence of a dislocation-controlled mechanism, with the drag produced by the interaction of the dislocation with the protons in the crystal. In addition, analysis of the detailed shape of the data curve showed two peaks of tan delta as a function of temperature. The second peak, which had not been previously reported, had an activation energy of 0.16 eV and a relaxation time of 1.7 x 10^8 sec at infinite temperature. These experiments indicated that both peaks vrere controlled by the dislocation mechanism described above.
    Type of Medium: Series available for loan
    Pages: iv, 41 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 243
    URL: http://hdl.handle.net/11681/5931
    Language: English
    Note: CONTENTS: Introduction. - Previous work. - Previous theory. - Internal friction of a crystal. - Granato-Lücke theory of dislocation damping. - Double kink mechanism. - Mechanisms not involving dislocations. - Experimental work. - Experimental approach. - Experimental apparatus. - Mode of oscillation. - Automated system. - Support, acoustic isolation, and temperature control. - Sample preparation. - X-ray apparatus. - Data analysis. - Stage I. - Stage II. - Stage III. - Experimental results and discussion. - The second peak. - Interpretation of scratching, X-irradiation, and plastic deformation. - Scratching. - X-irradiation. - Plastic deformation. - Supporting research. - Interpretation of the two peaks. - Conclusions. - Literature cited. - Appendix A: Computer programs. - Abstract.
    Location: AWI Archive
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 4
    Series available for loan
    Series available for loan
    Work-hardening and strain rate sensitivity of flow stress in high purity ice single crystals (1975)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-342
    In: Research report / Cold Regions Research and Engineering Laboratory
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Experimental procedure. - Results. - Work-hardening effect. - Strain rate sensitivity of flow stress. - Discussion. - Conclusions. - Literature cited.
    Description / Table of Contents: Single crystals of high purity ice deformed by uniaxial compression on an Instron machine showed remarkable work-hardening after about 8% strain. By changing the strain rate during compression tests in the plastic region of the stress-strain curve, an apparent activation volume V* and a dislocation mobility exponent m were calculated from the strain rate sensitivity of flow stress. The large work-hardening and the rapid increase in the value of m beyond about 10% strain indicate that the plastic flow in this region is controlled by dislocation intersections and nonconservative motion of jogs.
    Type of Medium: Series available for loan
    Pages: iii, 11 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 342
    URL: https://usace.contentdm.oclc.org/digital/collection/p266001coll1/id/6203
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 5
    Series available for loan
    Series available for loan
    Isua, Greenland : calculations of glacier flow for an open-pit mine (1973)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-309
    In: Research report
    Description / Table of Contents: CONTENTS: Preface. - Symbols. - Introduction. - Physical setting. - Flow model. - Calculated flow. - Existing profile. - Proposed profiles. - Profile 1. - Profile 2. - Profile 3. - Profile 4. - Profile 5. - Profile 6. - Profile 7. - Total excavation. - Interpretation and conclusions. - Sources of error. - Recommendations. - Literature cited. - Appendix A. - Abstract.
    Description / Table of Contents: The Marcona Corporation and Kryolitselskabet ?resund, A/S (a Danish corporation) are cooperatively investigating the possibility of developing an open-pit mine along the edge of the Greenland Ice Cap. The response of the glacier to a sudden change in surface slope and thickness is calculated. The existing flow is diverted away from the mineral deposit but will increase when the excavation begins. It is calculated that 66 million cubic meters of ice must be removed in order to establish a stable profile beyond the pit. An additional 7.9 million cubic meters of ice must be removed yearly in order to maintain the profile.
    Type of Medium: Series available for loan
    Pages: v, 25 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 309
    URL: http://www.worldcat.org/oclc/5965695
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 6
    Series available for loan
    Series available for loan
    Analysis of the freezeback of water in a cylindrical borehole drilled in an ice sheet (1974)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-323
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - The problem. - Reduction to ordinary differential equations. - General solution. - The first solution. - The second solution. - The third solution. - Determination of h(t). - Numerical computation. - Abstract.
    Description / Table of Contents: Herewith presented is the rigorous solution of the freezeback of water in a cylindrical borehole drilled in an ice sheet floating on water, based on the assumption that the temperature distribution does not depend on the vertical direction and the temperature of the water in the borehole is the freezing temperature. The solution is found by using the thickness of the newborn ice in place of time. Because of the complexity of the analysis, the solution can be found only for the first few terms of the series solution. Numerical computation of the solution thus found by use of the first few terms of the series solution yields the growth curve of the newborn ice that reaches maximum at a certain time. The solution ceases to be valid before the time of maximum is reached.
    Type of Medium: Series available for loan
    Pages: iii, 13 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 323
    URL: http://www.worldcat.org/oclc/5965637
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 7
    Series available for loan
    Series available for loan
    Effect of salinity on the optical extinction of sea ice at 6328Å (1973)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-308
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Sea ice as a material. - Experimental procedures. - Results and analysis. - Conclusion. - Literature cited. - Appendix A. Error analysis. - Abstract.
    Description / Table of Contents: An investigation is made into the determination of the relationship between the extinction coefficient and the salinity of sea ice. A HeNe laser is used to propagate a beam of red light, of wavelength 6328Å, through a series of ice samples at -20°C. The optical extinction coefficients were calculated and plotted against the measured salinities. The results of the experiment indicated an exponential relationship between extinction coefficient and salinity. The relationship may be described by the equation: y = 2.41 + 0.001 exp (1.19x) where y is the extinction coefficient and x is the salinity.
    Type of Medium: Series available for loan
    Pages: iii, 15 Seiten , Illutrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 308
    URL: http://www.worldcat.org/oclc/646985130
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 8
    Series available for loan
    Series available for loan
    Chemical indicators of Arctic biological and environmental activities (1972)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-301
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - 1.The flow of organic nutrients in plants in cold-dominated ecosystems and the influence of man's activities on this flow. - Methodology for extraction and estimation of plant lipids, alcohol and water-soluble carbohydrates, starch and fructans. - Seasonal cycles in lipids and alcohol-soluble carbohydrates in plants at Barrow, Alaska. - Biochemical changes in plants at the heated soil experiment at Barrow. - Literature cited. - II. Contributions of carbon dioxide from frozen soil into the arctic atmosphere. - Introduction. - Laboratory study. - Field study. - Conclusions. - Literature cited. - III. Biochemical estimations of underground plant biomass. - Appendix A. Methodology. - Abstract.
    Description / Table of Contents: Two approaches were used to study the carbon cycling in a cold-dominated ecosystem at Barrow, Alaska. One involved a detailed analysis of the flow of CO2 between the atmosphere, soil and biota and the other concentrated on the internal carbon cycling in plants. A pilot study was also conducted which investigated the possibility of estimating underground plant biomass by biochemical means. Both laboratory and field studies were conducted to analyze the input of CO2 to the arctic atmosphere by frozen tundra soils. Data are presented which indicate that frozen soil is a major source of CO2. It is hypothesized that CO2 trapped in soils during bi-directional freezing in the fall and winter is released during the spring thaw, thus producing a spring rise in CO2 content of the atmosphere. A procedure for the extraction and estimation of organic nutrients (lipids and carbohydrates) was developed and used to follow the seasonal cycle of these nutrients of plants obtained at Barrow, Alaska. No cycling in levels of carbohydrates (alcohol-soluble) was observed in the foliage during the season, however a definite cycling in lipid levels was seen for all the species studied. The species were synchronous. Plant survival and organic nutrient levels were followed during the winter over a heated-soil experiment at Barrow, Alaska. During the winter, the heating of the soil caused ponding which resulted in the elimination of Dupontia fischeri by mid-winter and the eventual death of all plants by spring. The carbohydrate levels indicated a starvation condition was created where a marked decrease in storage polymers (starch and fructans) occurred without a concurrent large increase in the alcohol-soluble carbohydrate levels. An increase in the fresh/dry weight ratios was also observed indicating etiolated, succulent growth in early winter. Four techniques were tried for estimating the below-ground biomass of plants. Two of these were eliminated as unsuitable, however two other methods(ATP and phospholipid-levels) remain to be fully evaluated.
    Type of Medium: Series available for loan
    Pages: iii, 26 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 301
    URL: http://www.worldcat.org/oclc/5973881
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 9
    Series available for loan
    Series available for loan
    Depth-time-temperature relationships of ice crystal growth in polar glaciers (1971)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-300
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Sampling. - Byrd Station. - Plateau Station. - Camp Century. - lnge Lehmann. - Grain-crystal relations. - Analytical techniques. - Thin sections. - Crystal size measurements. - Results and discussion. - Literature cited. - Appendix A: Crystal size as a function of depth and age in the Antarctic and Greenland ice sheets. - Abstract.
    Description / Table of Contents: The growth of ice crystals as a function of depth and time in polar firn and glacier ice has been investigated at a number of locations in Antarctica and Greenland. Thin sections of snow and ice were used to measure crystal size variations which showed, in all cases, that crystal size increases essentially linearly with the age of samples. Crystal growth rates are strongly temperature dependent. At Camp Century, Greenland, where the firn temperature is -24°C, crystals grow approximately 23 times faster than at Plateau Station, Antarctica, where the in situ temperature is -57°C. Extrapolation of the existing data indicates that crystal growth rates in polar firn and ice could be expected to vary by about two orders of magnitude over the temperature range -60°C to -15°C. Examination of the changes in the pore-crystal structure relationships to a dpeth of 100 m at Camp Century shows that these changes closely resemble those occuring in the full-scale isothermal sintering of powder compacts.
    Type of Medium: Series available for loan
    Pages: iii, 19 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 300
    URL: http://www.worldcat.org/oclc/5974076
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
  • 10
    Series available for loan
    Series available for loan
    Vibration of a floating ice sheet (1970)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-281
    In: Research report
    Description / Table of Contents: The solution for the vibration of an elastic plate floating on water is developed. The water is assumed to be incompressible and to have irrotational flow. In free vibration upon release of the plate, the maximum negative rebound of the deflection is 25%. For forced vibration, the steady state part of the solution shows that there is a frequency at which the deflection is a maximum. The stresses become a maximum at a frequency higher than the one for deflection. These critical frequencies depend upon the plate's characteristic length and the depth of the water. For most situations the critical frequency for stress is less than 0.2 cycle per second. At this critical frequency the stresses are amplified over the static case by a factor less than 10%.
    Type of Medium: Series available for loan
    Pages: ii, 9 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 281
    URL: http://www.worldcat.org/oclc/5973998
    Language: English
    Branch Library: AWI Library
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BOOK
    Link to Library Catalog
    get availability status
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...