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  • 1
    Electronic Resource
    Electronic Resource
    Possible geothermal resources in the Coast Plutonic Complex of southern British Columbia, Canada (1978)
    Springer
    Pure and applied geophysics 117 (1978), S. 172-179 
    Details
    ISSN: 1420-9136
    Keywords: Coast Plutonic Complex ; Quaternary volcanism ; Plate tectonics ; Heat flow ; Heat production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In southern British Columbia the terrestrial heat flow is low (44 mW m−2) to the west of the Coast Plutonic Complex (CPC), average in CPC (50–60 mW m−2),and high to the east(80–90 mW m−2). The average heat flow in CPC and the low heat generation (less than 1 μW m−3) indicate that a relatively large amount of heat flows upwards into the crust which is generally quite cool. Until two million years ago the Explorer plate underthrust this part of the American plate, carrying crustal material into the mantle. Melted crustal rocks have produced the inland Pemberton and Garibaldi volcanic belts in the CPC. Meager Mountain, a volcanic complex in the CPC 150 km north of Vancouver, is a possible geothermal energy resource. It is the product of intermittent activity over a period of 4 My, the most recent eruption being the Bridge River Ash 2440 y B.P. The original explosive eruption produced extensive fracturing in the granitic basement, and a basal explosion breccia from the surface of a cold brittle crust. This breccia may be a geothermal reservoir. Other volcanic complexes in the CPC have a similar potential for geothermal energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00879744
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  • 2
    Electronic Resource
    Electronic Resource
    Appollonius Revisited: Supporting Spheres for Sundered Systems (1997)
    Springer
    Discrete & computational geometry 18 (1997), S. 385-395 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. When C is a ball in ${\Bbb R}^d$ and S is the sphere $\partial C$ , we say that S supports a convex body B if S intersects B and either $B\subseteq C$ (then S is a far support) or the interior of C is disjoint from B (then S is a near support). The focus here is on common supports for a system $\cal B$ of d+1 bodies in ${\Bbb R}^d$ such that for each way of selecting a point from each member of ${\cal B}$ , the selected points are affinely independent and hence form the vertex-set of a d-simplex. The main result asserts that if $({\cal B}',{\cal B}'')$ is an arbitrary partition of ${\cal B}$ , then there exists a unique Euclidean sphere that is simultaneously a near support for each member of ${\cal B}'$ and a far support for each member of ${\cal B}''$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009324
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  • 3
    Electronic Resource
    Electronic Resource
    Geometric permutations and common transversals (1986)
    Springer
    Discrete & computational geometry 1 (1986), S. 371-377 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The object of this paper is to study how many essentially different common transversals a family of convex sets on the plane can have. In particular, we consider the case where the family consists of pairwise disjoint translates of a single convex set.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187708
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  • 4
    Electronic Resource
    Electronic Resource
    The different ways of stabbing disjoint convex sets (1992)
    Springer
    Discrete & computational geometry 7 (1992), S. 197-206 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract We construct a family ofn disjoint convex set in ℝ d having (n/(d−1)) d−1 geometric permutations. As well, we complete the enumeration problem for geometric permutations of families of disjoint translates of a convex set in the plane, settle the case for cubes in ℝ d , and construct a family ofd+1 translates in ℝ d admitting (d+1)!/2 geometric permutations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187836
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of 2,4-dichlorophenoxyacetic acid on different metabolic types of bacteria (1966)
    Springer
    Bulletin of environmental contamination and toxicology 1 (1966), S. 108-120 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01886774
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  • 6
    Electronic Resource
    Electronic Resource
    A quadratic potential time-of-flight mass spectrometer for use with slow positron ionization sources and other large-volume ion sources (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2131-2137 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A time-of-flight spectrometer has been specially designed for measuring the masses of ions produced by low-energy positrons interacting with organic molecules in a Penning trap. To make the flight times insensitive to the starting positions of the ions in the trap, acceleration was done using a potential that varied as the square of the distance of the ion from the detector. The containment of the positrons in the Penning trap for extended time periods effected very long collision paths between the positrons and the molecules. The entire length of the Penning trap source could be sampled. These features produced high sensitivity, enabling the measurement of ionization processes with small cross sections. The spectrometer is useful for mass spectrometry of ions produced by processes other than positron interaction. Both large and small volume sources can be accommodated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142327
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  • 7
    Electronic Resource
    Electronic Resource
    The coexistence of pressure waves in the operation of quartz-crystal shear-wave sensors (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 2524-2532 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that an AT-cut quartz crystal driven in the thickness-shear-wave mode and typically used as a sensor to monitor the viscoelastic shear-wave properties of a fluid also produce longitudinal pressure waves. Unlike the shear wave, these waves are capable of long-range propagation through the fluid and of reflection at its boundaries, notably at an outer fluid–air interface. They introduce a component into the measured electrical impedance and resonance frequency shift of the crystal, which reflects the setting up of cyclic pressure-wave resonances in the fluid. This has important implications for the practical employment of these crystal as sensors. Under appropriate conditions, as demonstrated for water and n-octane, it is possible to determine the propagating properties of sound waves in a fluid simultaneously with the viscoelastic shear-wave properties. These experiments are supported by an analysis of the appropriate hydrodynamic equations for waves in the crystal–fluid system, which predicts electrical characteristics in close agreement with those found experimentally. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366990
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  • 8
    Electronic Resource
    Electronic Resource
    The fracture of acrylic polymers in water (1984)
    Springer
    Journal of materials science 19 (1984), S. 1904-1916 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper describes the application of linear elastic fracture mechanics analysis to the fracture of acrylic polymers in water. Three denture base acrylics were studied in addition to Perspex. The effects of strain rate and temperature were investigated using double torsion specimens and three-point bend specimens. It was found for most materials that the fracture toughness was dramatically increased on testing in water compared with testing in air. Crack propagation at fast strain rates was unstable in water and the fracture toughness and flaw size were strain-rate dependent, increasing with decreasing test rate, whilst the un-notched fracture strength decreased with decreasing strain rate. At low strain rates, stable crack propagation was achieved and fracture toughness then decreased with decreasing strain rate. The results are discussed in terms of Williams' model for environmental fracture and the effect water has on the crazing process taking place at the crack tip.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550261
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  • 9
    Electronic Resource
    Electronic Resource
    Microbial transformation of 2,4,6-trinitrotoluene (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 89-96 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: 2,4,6-trinitrotoluene; TNT; biodegradation; bioremediation; munitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The manufacture and decommissioning of explosives has generated, and continues to generate, large quantities of waste material whose primary toxic and mutagenic component is 2,4,6-trinitrotoluene (TNT). The magnitude of this problem has motivated a great deal of research into treatment processes and environmental fate studies, including characterization of microbial transformations of TNT. This work has encompassed studies with mixed cultures and pure cultures of microorganisms derived from either TNT-exposed or unexposed sources, and studies using microorganisms chosen for their known capacities to degrade other pollutants. Several of these studies are discussed with regard to whether they identified a process that may lead to the complete detoxification or mineralization of TNT. Since oxygen can have a significant influence on the types of biochemical reactions that can occur and on the oxidation of intermediates of TNT transformation processes, studies in which oxygen was not excluded are discussed separately from studies conducted under anaerobic conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900258
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  • 10
    Electronic Resource
    Electronic Resource
    2,4,6-Trinitrotoluene (TNT) transformation by clostridia isolated from a munition-fed bioreactor: comparison with non-adapted bacteria (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 82-88 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: anaerobic TNT degradation; clostridia; enteric bacteria; lactobacilli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Several bacterial strains were examined for their ability to degrade the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT). The strains examined included various clostridial strains isolated from a 4-year-old munition enrichment, related clostridial strains obtained from a culture collection, two enteric bacteria, and three lactobacilli. All Clostridium species tested were able to reduce TNT rapidly in a complex medium. In cell suspension experiments, these strains were also able to reduce 2,4-diamino-6-nitrotoluene (DANT) to 2,4,6-triaminotoluene (TAT) and to produce a compound that is not yet identified; thus, they could not be distinguished from one another with regard to the pathway of transformation. The enteric strains and the lactobacilli were able to perform the initial reduction of TNT, but none was capable of reducing DANT in cell suspensions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900257
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