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  • Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory  (3)
  • English  (3)
  • Arabic
  • Polish
  • 1995-1999
  • 1970-1974  (3)
  • 1940-1944
  • 1971  (3)
  • 1
    Series available for loan
    Series available for loan
    Influence of soil on detection of buried explosives and tunnels by trace gas analysis (1971)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-292-288
    In: Research report
    Description / Table of Contents: Contents: Preface. - List of symbols. - Introduction. - Adsorption of volatile chemicals by soil. - Introduction. - Experimental procedure. - Results and discussion. - Diffusion of volatile chemicals in soil. - Introduction. - Experimental procedure. - Calculations. - Results and discussion. - Prediction of vapor diffusion in soil. - Introduction. - Construction of model. - Computations. - Results and discussion. - A statistical method for analysis of diffusion through soil. - Introduction. - Theory. - Application. - Literature cited. - Abstract.
    Description / Table of Contents: Detection of mines, explosives, and tunnels may be accomplished by sensing associated volatile effluvia. This investigation was undertaken to provide a basis for predicting the diffusion of volatile compounds from underground sources into the atmosphere. Diffusion of a volatile compound was studied for a range of soil conditions utilizing soils from the mine detection sites in Puerto Rico. A new mathematical analysis based on the Monte Carlo method was developed for predicting vapor diffusion through soil into the atmosphere. It was determined that diffusion in soil can be reliably predicted if soil porosity, moisture content, and affinity for the compound are known. Appearance in the atmosphere is also dependent on accumulation of the compound in air at the soil/atmosphere interface. Diffusion of volatile compounds through soil into the atmosphere is not likely to be an important factor in tunnel detection due to depth of overburden. However, adsorption of compounds at tunnel walls is likely to significantly reduce the amount of vapor appearing in the atmosphere through entrances and vents. Detection in the atmosphere of TNT vapor from mines and explosives buried in moist, porous soil should be possible under ideal sample collection conditions.
    Type of Medium: Series available for loan
    Pages: v, 43 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 288
    URL: http://www.worldcat.org/oclc/227635497
    Language: English
    Branch Library: AWI Library
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  • 2
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    Series available for loan
    Summer temperatures in interior Alaska (1971)
    Hanover, NH : Corps of Engineers, U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Details Availability
    Call number: ZSP-202-244
    In: Research report
    Description / Table of Contents: CONTENTS: Introduction. - Summer temperature data. - Station network and history. - Parameters for data reduction. - Analysis of summer temperatures. - Temperature trends. - Summer temperatures in the highlands. - Lapse rates for summer temperatures. - Spatial variation of summer temperatures. - Summary. - Literature cited. - Appendix A. - Appendix B. - Appendix C. - Abstract.
    Description / Table of Contents: Annual degree-day summations over bases of 43°F and 50°F in 15-day periods from May through August are given for the period of record for five interior Alaska climatic stations. Average temperature and precipitation data are included. Patterns of summer temperature in interior Alaska are analyzed in terms of historical, elevational and areal differences. Since 1900, summer temperatures show little long-term change but significant short-term changes. In contrast, winter temperatures show considerable fluctuations, which are reflected in mean annual temperatures to a much greater degree than are summer temperature fluctuations. Average summer lapse rates for the 1600 to 3300 and 3300 to 6600-ft levels were 3.4 and 3.7°F/1000 ft, respectively, based on timberline temperature observations and on upper air data from Fairbanks. Correlation analysis of daily and monthly average July temperatures indicates areas of uniformity with respect to temperature variation. This provides information on lowland climatic stations that are representative of highland locations, especially the Yukon-Tanana Uplands
    Type of Medium: Series available for loan
    Pages: iv, 37 Seiten , Illustrationen, Karten
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 244
    URL: https://babel.hathitrust.org/cgi/pt?id=uc1.31210025591825&seq=3
    Language: English
    Location: AWI Archive
    Branch Library: AWI Library
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  • 3
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    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
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