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  • 1
    Electronic Resource
    Electronic Resource
    Paired-phonon analysis of impurities in bose fluids (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1057-1064 
    Details
    ISSN: 0392-6737
    Keywords: Boson degeneracy and superfluidity of helium-4
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si impiega l'analisi a fotoni appaiati per miscele di bosoni insieme all'approssimazione dell'«hypernetted chain» per studiare le proprietà dello stato fondamentale di un'impurezza inglobata nell'4He liquido. I potenziali chimici, i coefficienti di volume ed altre quantità termodinamiche cosí come alcune delle piú interessanti funzioni di correlazione ottimali sono calcolati per varie impurezze interagenti con atomi di un fondo di4He attraverso potenziali di Lennard-Jones di diversa intensità.
    Abstract: Резюме Анализ спаренных фононов для бозонных примесей используется вместе с приближением гиперсеточной цепи для исследования свойств основного состояния примеси, внедренной в жидкий4He. Вычисляются химические потенциалы, объемные коэффициенты и другие термодинамические величины, а также наиболее интересные корреляционные функции для различных примесей, взаимодействующих с атомами4He через потенциалы Леннарда-Джонса различной силы.
    Notes: Summary The paired-phonon analysis for boson mixtures is employed in conjunction with the hypernetted-chain approximation to study the ground-state properties of an impurity embedded in liquid4He. Chemical potentials, volume coefficients and other thermodynamic quantities as well as some of the most interesting optimal correlation functions are calculated for various impurities interacting with the4He background atoms via Lennard-Jones potentials of differing strength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457140
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  • 2
    Electronic Resource
    Electronic Resource
    Thermoperception in the common vampire bat (Desmodus rotundus) (1982)
    Springer
    Journal of comparative physiology 146 (1982), S. 223-228 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The common vampire bat,Desmodus rotundus, is known to be capable of detecting temperature differences. In the experiments described here two animals were trained to give preference to the radiation emitted by a warm signal unit (the negative unit was left at room temperature). The distance between the decision line and the signal units was 8, 12 or 16 cm. Both animals responded to radiation as low as 0.5 × 10−4 W cm−2 (Fig. 3). 2. Based on calculations of the radiation emitted by the human skin, vampires should be capable of detecting warm-blooded animals at a distance up to 16 cm (Fig. 4). This sense for thermal radiation may aid these bats in localizing or selecting a suitable biting site. 3. Histological studies of the bats' facial structures indicate that thermal stimuli are most probably perceived in the three pits surrounding the central nose leaf: the thin, hairless and glandless skin is underlaid with dense connective tissue. Thermography reveals that the surface temperature of the nasal region is up to 9 °C lower than that of the neighboring parts of the face (Fig. 2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00610241
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  • 3
    Electronic Resource
    Electronic Resource
    Warm and cold receptors in the nose of the vampire bat Desmodus rotundas (1984)
    Springer
    Naturwissenschaften 71 (1984), S. 327-328 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396621
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  • 4
    Electronic Resource
    Electronic Resource
    Spin-dependent correlations in normal liquid 3He (1981)
    Springer
    Journal of low temperature physics 44 (1981), S. 149-161 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Using a generalized Fermi hypernetted chain method on a Jastrow trial ground-state wave function, which includes a dependence on the z component of the nuclear spin, it is shown that spin correlations make a significant contribution to the ground-state energy of liquid 3He, accounting for much of the energy necessary to stabilize unpolarized liquid 3He relative to completely polarized 3He.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00115080
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  • 5
    Electronic Resource
    Electronic Resource
    Verfahrenstechnik der Kohlehydrierung in Sumpfphasen-ReaktorenVortrag auf der internen Arbeitssitzung des GVC-Fachausschusses „Prozeß- und Anlagentechnik“, 26./27. Okt. 1981 in Gummersbach. (1982)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 54 (1982), S. 409-415 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Chemical engineering of coal hydrogenation in sump phase reactors. The science of chemical engineering was still in its infancy when the hydrogenation of coal was developed from 1924 onwards at Ludwigshafen, Rhineland. The term backmixing, for example, was unknown. Nevertheless, the scale-up from a pilot to a production reactor was performed correctly at that time. Even with today's knowledge, the IG Farben sump phase reactors could not have been better designed. Almost four decades have meanwhile elapsed since the cessation of coal hydrogenation in Germany (1945). Nowadays high pressure reactors having more than 50 times the volume of the IG reactors can be produced. Considerable advances have also been made in measurement and control engineering. Hence new chemical engineering questions and solutions arise. If coal hydrogenation is to be performed on a significant industrial scale in 10 to 20 years, this will be economically feasible only by exploiting the possibilities of large reactors having a throughput of 1 to 3 million tons of coal per annum.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330540502
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    Paper (German National Licenses)
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