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  • 1
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    Comparison of calculated and observed crack densities and seismic velocities in Westerly granite (1976)
    In:  J. Geophys. Res., Warszawa, Eötvös Lorand Geophysical Institute of Hungaria, vol. 81, no. 9-12, pp. 3484-3494, pp. 2342, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1976
    Keywords: Velocity ; Laboratory measurements ; cracks and fractures (.NE. fracturing) ; Modelling ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Spatial models reveal the microclimatic buffering capacity of old-growth forests (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-04-28
    Description: Climate change is predicted to cause widespread declines in biodiversity, but these predictions are derived from coarse-resolution climate models applied at global scales. Such models lack the capacity to incorporate microclimate variability, which is critical to biodiversity microrefugia. In forested montane regions, microclimate is thought to be influenced by combined effects of elevation, microtopography, and vegetation, but their relative effects at fine spatial scales are poorly known. We used boosted regression trees to model the spatial distribution of fine-scale, under-canopy air temperatures in mountainous terrain. Spatial models predicted observed independent test data well ( r = 0.87). As expected, elevation strongly predicted temperatures, but vegetation and microtopography also exerted critical effects. Old-growth vegetation characteristics, measured using LiDAR (light detection and ranging), appeared to have an insulating effect; maximum spring monthly temperatures decreased by 2.5°C across the observed gradient in old-growth structure. These cooling effects across a gradient in forest structure are of similar magnitude to 50-year forecasts of the Intergovernmental Panel on Climate Change and therefore have the potential to mitigate climate warming at local scales. Management strategies to conserve old-growth characteristics and to curb current rates of primary forest loss could maintain microrefugia, enhancing biodiversity persistence in mountainous systems under climate warming.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Bacterial characterization by flow cytometry (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-06
    Description: Bacteria were analyzed in a dual-beam flow cytometer after double staining with the fluorescent dyes chromomycin A3 and Hoechst 33258, which bind preferentially to DNA that is rich in guanine-cytosine and adenine-thymine, respectively. The measurements were indicative of the cellular DNA content and base composition, cell concentration, and proliferative state of the population. The ratio of the chromomycin A3 signal to the Hoechst 33258 signal increased with the guanine-cytosine content of the cellular DNA for the six cultured species measured, following expectation. Bacteria in urine from patients with urinary tract infections were characterized without interference from host cell DNA, debris, or other particulates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Dilla, M A -- Langlois, R G -- Pinkel, D -- Yajko, D -- Hadley, W K -- New York, N.Y. -- Science. 1983 May 6;220(4597):620-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6188215" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/analysis/genetics/*metabolism ; Base Composition ; Bisbenzimidazole ; Chromomycin A3 ; DNA, Bacterial/analysis ; Escherichia coli/metabolism ; Flow Cytometry/*methods
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
    Electronic Resource
    Electronic Resource
    An improved optical system for photofield emission (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 2074-2076 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An improved optical system has been designed for use in experimental studies of photofield emission. By increasing the angle of convergence of the focused laser beam onto the field emitter a smaller focal spot is obtained. For a given beam intensity, this results in a substantial increase in the irradiance at the emitting surface. In addition, the smaller focal spot reduces the laser-induced temperature rise of the field emitter for a given irradiance. The design of the improved optical system is discussed and its performance is evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138422
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Influence of shank profile on laser heating of a field emitter (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 2617-2625 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements of the temperature rise of a laser-illuminated field emitter show that a tip temperature in excess of 1000 °K can be obtained with a focused laser beam of modest power, and that the temperature rise per unit irradiance varies approximately in inverse proportion to the radius of the focal spot. By measuring the irradiance of the central fringe in the Fraunhofer diffraction pattern of a field emitter in a focused laser beam, the profile of the field emitter is mapped without removing it from the vacuum tube. A calculation based on the observed shank profile, and taking into account diffraction in a simple approximation, predicts a peak temperature rise in good agreement with experiment. These findings have important practical applications in photofield emission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335453
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    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Pyrolysis gas chromatography over hydrogenated graphitised carbon black - Differentiation of chewing gum bases for forensic purposes
    Amsterdam : Elsevier
    Journal of Chromatography A 101 (1974), S. 417-423 
    Details
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0021-9673(00)82862-9
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    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Kinetics of styrene homogeneous polymerization to atactic polypropylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 71-82 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rate of polymerization of styrene initiated by hydroperoxidized atactic polypropylene in a homogeneous toluene solution has been measured at 60 and 70°C. The reaction is first-order with respect to styrene concentration and independent of the polymeric hydroperoxide concentration above 2 × 10-5N hydroperoxide. The individual rate constants, length and frequency of the grafted polystyrene chains along the polypropylene backbone have been calculated and their significance discussed. The initiation rate constant compares closely with values reported for the analogous tert-butyl hydroperoxide-initiated polymerization. The rate constant for the chain transfer termination elementary step at 70°C., however, is 18 times the value reported for the tert-butyl hydroperoxide-initiated polymerization of styrene. This high constant accounts for the relatively low rates of polymerization observed and high termination rates. Chain deactivation is presumably accelerated by increased collisions between growing styrene chains and inactive propylene hydroperoxide and polystyrene molecules. Distribution of polystyrene grafts on polypropylene is estimated from knowledge of effects of styrene concentration, polymeric hydroperoxide concentration, and temperature upon the rate of polymerization.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.150040105
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    Paper (German National Licenses)
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  • 8
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    Lewis and Clarks' Tempest: The 'perfect storm' of November 1805, Oregon, USA (2011)
    Sage
    In: Holocene
    Details
    Publication Date: 2011-05-26
    Description: Three weeks after arriving near the Pacific Northwest (PNW) coast in November 1805, Lewis and Clarks’ Corps of Discovery experienced a two-day windstorm that may have rivaled the strongest historically documented storms of the nineteenth and twentieth centuries. Based on the Corps’ detailed historical accounts describing the event as the perfect storm, we characterized the severity of the 1805 windstorm using tree-ring growth anomalies from windsnapped Sitka spruce collected at three sites along the northern Oregon Coast. We compared the 1805 gale to eight other documented events with comparable storm tracks and exceptional magnitude including the 1880 and 1951 events that each caused more than a billion board feet ( c. 2.4 million m 3 ) of windthrow. Statistical comparison of tree-growth responses revealed that the 1805 windstorm was the only event to differ significantly ( 2 ; test, p 〈 0.05, d.f. = 1) from all other storms. Our findings demonstrate the potential application of tree-ring data and historical documents to understand previously obscure climatic events similar to the extreme droughts that led to the demise of the Roanoke Colony during the sixteenth century and adversity experienced by the Jamestown Colony during the seventeenth century. Specifically, we identify the Lewis and Clark tempest of 1805 as being among the most severe PNW windstorms during the past two centuries, and may have contributed to the Corps’ dismal view of coastal Pacific Northwest weather.
    Print ISSN: 0959-6836
    Electronic ISSN: 1477-0911
    Topics: Geography , Geosciences
    Published by Sage
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  • 9
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    Influence of shank profile on laser heating of a field emitter (1985)
    American Institute of Physics
    Details
    Publication Date: 1985-04-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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  • 10
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    An improved optical system for photofield emission (1985)
    American Institute of Physics
    Details
    Publication Date: 1985-11-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics
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