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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Polymer bulletin 25 (1991), S. 459-466 
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Thin filns of PSt/PMAA and PEO-PSt-PEO block polyners were deposited on a polystyrene substrate by solution adsorption (with or without solvent treatnent), and the filn surfaces were characterized by neans of XPS. Direct solvent-casting of PEO-PSt-PEO from benzene solutions resulted in PSt-rich surfaces, whereas PMAA richer surfaces were obtained for PSt/PMAA filns cast from DMF solutions. Moreover, solvent treatment after casting had profound effect on the filn surface conposition. Treatment with water markedly increased the surface concentration of polar PEO segments. In the case of PSt-PMAA block polymers, the PSt content on the surface increased in the order of water〈 ethanol 〈 cyclohexane 〈 petroleum ether, the last-named giving films with almost pure PSt surface. It is well worth noticing that the bulk conposition had little to do with the surface conposition for both PSt/PMAA and PEO-PSt-PEO block polyners within the conposition range investigated when subsequent solvent treatnent was applied.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Optical and quantum electronics 24 (1992), S. 619-630 
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Three-dimensional astigmatic resonators, typical examples of which are the resonators bounded by cylindrical-spherical mirrors and cylindrical-cylindrical mirrors oriented at an arbitrary crossed angle, are investigated in detail by using a complex curvature tensor concept and generalized tensor ABCD law. Computerized numerical calculations illustrate some interesting characteristics of these astigmatic resonators.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Rock mechanics and rock engineering 14 (1981), S. 167-185 
    ISSN: 1434-453X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Description / Table of Contents: Summary The Neotectonic Stress Field in the Regions of Shaanxi, Gansu, Ningxia and Qinghai (China) Geological, seismological, geodetic and geomorphological data were used to determine the orientation of the principal large scale regional neotectonic normal stress directions in North-Central China. It is shown that the maximum pressure is oriented NE-SW (N 40° E). In detail, there appears to be a rotation of the maximum pressure direction from N 7° E in Ladakh to N 33° E in Chinese Western Xizang and ca. N 70° E in the Southwestern part of our region investigated: This may be an indication that apart from the effect of the collision between the Eurasian and Indian tectonic plates, there may also be felt an effect of the collision between the Eurasian and Pacific plates.
    Abstract: Résumé Les contraintes tectoniques dans les régions de Shaanxi, Gansu, Ningxia et Qinghai (Chine) On a utilisé des dates géologiques, séismologiques, géodétiques et géomorphologiques pour déterminer l'orientation des contraintes régionales néotectoniques principales à grand echelle dans le nord de la Chine centrale. Il est démontré que la pression maximale a une direction de NE à SO (N 40° E). En détail, on observe une rotation de la pression maximale de N 7° E dans le Ladakh jusqu'à N 33° E dans le Xizang oriental chinois et à N 70° E dans le sud-ouest de la région investiguée dans le présent travail. Ceci peut être une indication que, à part de l'effet de la collision entre la plaque tectonique de l'Eurasie et celle de l'Inde, on observe un effet de la collision entre la plaque tectonique de l'Eurasie avec celle du Pacifique.
    Notes: Zusammenfassung Das neotektonische Spannungsfeld in den Regionen von Shaanxi, Gansu, Ningxia und Qinghai (China) Geologische, seismologische, geodätische und geomorphologische Daten wurden verwendet, um die Richtung der überregionalen, neotektonischen Hauptnormalspannungen im nördlichen Zentralchina zu bestimmen. Es wird gezeigt, daß die maximale Druckspannung eine NE-SW-Richtung hat (N 40° E). Im Detail scheint es eine Rotation der maximalen Druckspannungsrichtung von N 7° E im Ladakh bis N 33° E im chinesischen Westxizang und bis ca. N 70° E im Südwesten der hier untersuchten Region zu geben. Dies kann ein Hinweis dafür sein, daß, abgesehen vom Effekt einer Kollision zwischen der eurasischen und indischen tektonischen Platte, sich auch der Effekt der Kollision zwischen der eurasischen und pazifischen Platte bemerkbar macht.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 12 (2001), S. 1-4 
    ISSN: 1434-601X
    Keywords: PACS. 23.40.-s Beta decay; double beta decay; electron and muon capture – 21.10.Tg Lifetimes – 27.60.+j 90 ?A? 149
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The β-delayed proton precursor 149Yb was synthesized in the reaction 112Sn(40Ca, 3n) and identified by using a proton-gamma coincidence measurements in combination with a helium-jet fast tape transport system. Its β-delayed proton spectrum was observed. The half-life of 149Yb was determined to be 0.7±0.2 s. The 253, 101, and 365 keV γ transitions in 147Dy, following β-delayed proton emission of 148Ho decay, were reported for the first time.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 50 (1990), S. 319-322 
    ISSN: 1432-0649
    Keywords: 42.65 ; 42.40 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new type of anisotropic scattering with ring-and-line structure is observed for the first time from a BaTiO3 crystal illuminated by a linearly polarized laser beam. The analysis presented herein is based on the photorefractive four-wave interaction of the incident, reflected, and scattered beams. The experimental results agree well with the theoretical analysis.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 64 (2000), S. 221-227 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of intelligent and robotic systems 15 (1996), S. 25-32 
    ISSN: 1573-0409
    Keywords: Identification ; optimal trajectories ; non-linear optimisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this paper, the problem of finding optimal exciting trajectories for parameter identification of industrial robots is investigated. A cost function of maximizing the minimum singular value of a recursive matrix is used in the optimization procedure. The optimal exciting trajectories obtained is insensitive with respect to the parameter perturbation. The identification accuracy and convergence speed or parameters is improved.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 64 (2000), S. 176-183 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 64 (2000), S. 316-322 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 64 (2000), S. 383-389 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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