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  • Springer  (76)
  • American Association of Petroleum Geologists (AAPG)
  • Cambridge University Press
  • Washington, DC : United States Gov. Print. Off.
  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 431-441 
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si discute lo scattering elastico di elettroni dagli atomi di cesio e xenon ad energie di collisione al di sotto dei 40 eV. Si studia l'uso del potenzialeX α con α=0.55 e si confrontano i nostri calcoli che usano questo potenziale con sezioni d'urto sperimentali. Si è trovato un ragionvole accordo con le distribuzioni angolari misurate di Gehenn e Reichert, Kleweret al., respettivamente, in contrasto con i calcoli esistenti di Fink e Yates, Walker e McCarthyet al.
    Abstract: Резюме Обсуждается упругое рассеяние электронов на атомах ксенона и цезия при энергиях ниже 40 эВ. Мы анализируем использованиеХ α-потеициала с α=0.55 и сравниваем наши вычисления, использующие этот потенциал, с экспериментальными поперечными сечениями. Получено разумное согласие с угловыми распределениями, измеренными Гехеном и Райхертом и Клевером и др., в иротивоположность существующим вычислениям Финка и Ятса, Уолкера и Маккарти и др.
    Notes: Summary The elastic scattering of electrons from caesium and xenon atoms at collision energies below 40 eV is discussed. We study the use of theX α-potential with α=0.55 and compare our calculations using this potential with experimental cross-sections. Reasonable agreement has been found with the measured angular distributions of Gehenn and Reichert and Kleweret al., respectively, in contrast to the existing calculations of Fink and Yates, Walker and McCarthyet al.
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 16 (1978), S. 279-287 
    ISSN: 1432-0630
    Keywords: 42.80 ; 85.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Optical projection of masks is a very troublesome task if dimensions are in the submicron range. It is difficult to get an undistorted image in the resist. This problem can be overcome by introducing corrections in the penultimate mask. Till now this has been done by a trial and error method in which an acceptable pattern is made only after a time consuming iterative process. In this paper a description will be given of the image forming process in which diffraction at the penultimate mask and at the aperture of the lens are the critical features. Based upon this theory correction formulas are derived for the direct design of penultimate masks. Rules for maximum edge sharpness are given, so that the tolerance demands on the production process can be relaxed. Extensive experimental measurements are in good agreement with theory. It will be shown theoretically as well as practically that by asymmetrical arrangement of the optical system images of gratings with 0.2–0.3 μm linewidth can be obtained.
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 2 (1973), S. 137-142 
    ISSN: 1432-0630
    Keywords: Thin MnBi films ; Coercive force ; Rayleigh curve
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Statistical Rayleigh-curve theory is applied to thin evaporated MnBi films in order to obtain information concerning the density of wall pinning centra. The treatment results in a prediction of the coercive forceH c and the average distance between adjacent wall pinning centra, 2L 0. The coercive forceH cis also measured experimentally. The results of the two methods are in good agreement with each other. The influence of dislocations on the coercive force is discussed briefly.
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 4 (1981), S. 165-166 
    ISSN: 1432-0983
    Keywords: Protoplast fusion ; Parasexual hybrids ; Electric field pulse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Under the action of a high electric field pulse a pronounced stimulation of yeast protoplast fusion initiated by polyethylene glycol and Ca 2+ ions was found. The fusion rate was enhanced by a factor of 200 for different genetically marked strains of the yeast Saccharomyces cerevisiae as compared with fusion without electric field treatment. Genetic evidence for fusion has been obtained by isolating parasexually produced hybrids resulting from combination of the genomes of both mutants. Our method allows the production of a large number of parasexual hybrids for different purposes.
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Letters in mathematical physics 6 (1982), S. 511-511 
    ISSN: 1573-0530
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 11 (1990), S. 597-601 
    ISSN: 1572-9567
    Keywords: measurement techniques ; nitrogen ; parallel-plate apparatus ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A parallel-plate apparatus is suited for accurate measurements of the thermal conductivity coefficient of fluids over a wide range of densities. This is illustrated by measurements of the thermal conductivity coefficient of nitrogen at a temperature of 308.15 K and at pressures up to 20.1 MPa with an accuracy of 0.5%. The agreement with a recent correlation based on accurate measurements by other authors is satisfactory.
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 14 (1993), S. 865-892 
    ISSN: 1572-9567
    Keywords: capillary flow ; compressible flow ; entry length ; expansion cooling ; temperature field ; viscous dissipation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal effects for a compressible viscous flow in a capillary have been calculated by solving the equation of energy, where a parabolic profile is assumed for the axial flow velocity. It is shown that, in general, the temperature changes are small (a few millikelvins), consistent with the current assumption of an isothermal flow, except in the case of a critical, i.e., very compressible, fluid where the cooling can be substantial. This effect is demonstrated numerically on the basis of a flow of ethylene in nearly critical circumstances.
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 13 (1992), S. 1043-1052 
    ISSN: 1572-9567
    Keywords: carbon dioxide ; critical parameters ; critical phenomena ; ethane ; plait point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper deals with an evaluation of the critical parameters reported for mixtures of carbon dioxide and ethane. Equations are presented for the critical parameters as a function of the concentration.
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 179 (1961), S. 29-34 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Als Ergebnisse unserer Untersuchungen an Perlonen möchten wir abschlie\end herausstellen: 1. die Abhängigkeit der Identitätsperiode von der mittleren Molekülkettenlänge, 2. die Abhängigkeit des Teilchengrö\en-äquivalentes in Richtung der Rostebene von der mittleren Molekülkettenlänge, 3. die Veränderung der Strukturparameter bereits bei kleinsten Dehnungen, 4. die geringe Orientierungsänderung während des ganzen Zugversuches, 5. die Möglichkeit, die genannten Effekte durch ein überwiegendes Fibrillenmodell auch in der verstreckten Faser zu erklären.
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 210 (1966), S. 64-78 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Die Eigenschaften synthetischer Fasern hängen von ihrer Molekül- und Faserstruktur ab. Moleküllänge, Moleküllängenverteilung, die Statistik der Anordnung von Monomeren bei der Copolymerisation und die Steifheit des Moleküles sowie die Beweglichkeit von Molekülteilen im festen Zustand beeinflussen die Orientierbarkeit und die Kristallisation der Fasern und damit vor allem die mechanischen Eigenschaften und das thermische Umwandlungsverhalten. Im Anschluß an eine Darstellung der Fasermodelle wird eine Reihe von Fragen zur Veränderung der Faserstruktur bei der Faser-Herstellung, -Verarbeitung und bei ihrem Gebrauch diskutiert. Einige Beispiele zeigen, daß jede meßbare Fasereigenschaft von einer ganzen Reihe von Strukturparametern abhängt, bzw. daß jeder Strukturparameter eine Reihe von Fasereigenschaften bestimmt. Dabei gehen die Strukturparameter mit unterschiedlichem Gewicht und abhängig vom Wege, auf dem sie erreicht werden, in die Fasereigenschaften ein.
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