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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 274-279 
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: An analysis of the coherent states for the noncompact supergroup Osp(2/2N,R) is presented. In contrast to Osp(1/2N,R), both typical and atypical representations have to be considered. The measure of integration, in general, for Osp(2/2N,R) coherent states is calculated; it is then used to construct the decomposition of unity for the special case of Osp(2/2,R). It is found, however, that the typical and atypical representations of Osp(2/2,R) have to be treated separately. It is verified that the coherent states for Osp(2/2,R) are "closest to classical'' in the sense of Perelomov.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 2714-2720 
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Some physically realizable positive discrete series representations of the noncompact orthosymplectic superalgebra Osp(4/2,R) are considered. The decomposition of these Osp(4/2,R) representations on reduction to Sp(2,R)×SO(4) is studied in detail, and the corresponding state vectors are explicitly constructed by acting with the generators on a general lowest weight state. Some examples are given to illustrate these results for particular single-particle spaces.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 29 (1988), S. 1634-1639 
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Coherent states for the harmonic oscillator representations of the noncompact supergroup Osp(1/2N,R) are introduced and the invariant integration measure is calculated by studying transformation properties of supercoset variables. The generalized Bogoliubov transformation for mixed systems of bosons and fermions is also obtained. An example for the simple harmonic oscillator is given.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 4198-4203 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The deuterated dicyanoquinonediimine salt Cu(2-CD3,5-CD3-DCNQI)2, (d6), a highly conductive organic metal, exhibits a phase transition from the metallic to the insulating state at Tc≈60 K. In a wide temperature range we observe an anticoincidence of high conductivity and electron spin resonance (ESR). These experiments were performed simultaneously in our ESR apparatus equipped for application of He pressure up to 200 bar. Near Tc there is a coexistence of conducting (ESR-silent) and insulating (ESR-detectable) domains. This correlation of ESR and conductivity σ points to a percolation limited conductivity. Upper and lower limits of the size of the domains are given. Light shifts Tc to lower temperatures, pressure to higher ones. This could be due to shrinking of the lattice which induces the phase transition when critical structural parameters are approached. This is most probably explained by a simultaneous development of a charge density wave (CDW) and a spin pairing within the DCNQI stack together with the trimerization of the lattice. Systematic measurements by variation of temperature, pressure, and light led to phase diagrams of (d6) and to the understanding of the mechanism of the phase transitions. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 1821-1825 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz 42 (1999), S. A311 
    ISSN: 1437-1588
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1434-601X
    Keywords: PACS:29.25.Dz Neutron sources – 25.40.Ve Other reactions above meson production thresholds – 13.75.Cs Nucleon-nucleon interactions (including antinucleons, deuterons etc.)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstact: The kinetic energy spectrum and the polarization of the PSI neutron beam produced in the reaction 12C(p,n)X at 0° with 590 MeV polarized protons were investigated. A strong energy dependence of the neutron beam polarization is observed which was not expected at the time the neutron beam was built.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 97 (1995), S. 83-93 
    ISSN: 1434-6036
    Keywords: 79.60 ; 71.20 ; 71.28
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated hole doped (by lithium) and electron-doped (by nickel metal) NiO with photoemission (PES), inverse photoemission (IPES) and low and high energy electron energy loss spectroscopy (EELS). Both types of doping create empty states approximately in the middle of the charge transfer gap of undoped NiO.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 206 (1968), S. 431-436 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Untersuchungen an isolierten Uteri (Ratte, Maus) und beim Menschen während Kaiserschnitten ergaben, daß Oxytocinwährend undunmittelbar nach Halothan-Exposition in der Lage ist, eine Halothan bedingte Wehenhemmung und Basaltonussenkung aufzuheben. Methergin war dagegen nicht in der Lage,während oderunmittelbar im Anschluβ an die Halothan-Narkose die Wehenhemmung und Basaltonussenkung zu durchbrechen, und eine erneute Wehentätigkeit mit Basaltonusanstieg herbeizuführen. Halothan vermochte jedoch seinerseits dosisabhängig eine Oxytocin oder Methergin induzierte hypertone Wehentätigkeit zu durchbrechen und eine Wehenhemmung und Basaltonussenkung zu erzeugen. Zur Frage des Fehlens metherginsensibler Receptoren am Ratten-Uterus und zur Frage der Angriffspunkte und Wirkungsmechanismen von Halothan, Oxytocin und Methergin wurde Stellung genommen.
    Abstract: Résumé Des expériences exécutées sur l'utérus isolé (rat, souris) ainsi que chez l'homme lors de césariennes ont démontré quependant etjuste après exposition à l'Halothane (Fluothane) l'oxytocine est capable de compenser l'inhibition des contractions et la baisse du tonus de base dues à l'Halothane. Au contraire avec la Méthergine il n'a pas été possible, ni chez l'homme ni chez l'animal, de compenser l'inhibition des contractions et la baisse du tonus de basependant ou juste après exposition à l'Halothane et de provoquer à nouveau le travail avec élévation du tonus de base. De sa part pourtant l'halothane a été capable, en dépendance de la dose, de couper le travail utérin hypertonique provoqué par l'oxytocine ou la Métbergine et de provoquer une inhibition des contractions et une baisse du tonus de base. Il est pris position envers la possibilité du manque de récepteurs sensibles à la Méthergine dans l'utérus du rat ainsi qu'envers la question des points d'attaque et du mode d'action de l'Halothane, de l'oxytocine et de la Méthergine.
    Notes: Summary Experiments on isolated uteri of rats and mice and observations of women during caesarian sections showed, that Oxytocin, during and immediately after Fluothane exposition, is able to abolish the Fluothane induced inhibition of labour contraction and the reduction of the basal tone. In contrast, Methergin was found to be unable to abolish the Fluothane induced effects under the same experimental conditions. Fluothane itself, however, depending on doses given, was able to stop the Oxytocin or Methergin induced hypertonic labour contractions and to create a labour inhibition and to reduce the basal tone. The question as to the absence of Methergin sensitive receptors in the rat uterus and the problem of the reaction points and mechanism of action of Fluothane, Oxytocin and Methergin are discussed.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 36 (1968), S. 335-347 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The formation of a shock wave by the gradual steepening of an acceleration wave in plane motion or in motion with cylindrical or spherical symmetry is studied for a gas which undergoes an arbitrary number of thermodynamic relaxation processes. The thermodynamic state of the relaxing gas is described implicitly by introducing additional independent thermodynamic variables together with relaxation equations for these variables. The conservation of mass and momentum leads to relations for the propagation of acceleration discontinuities. Combined with the thermodynamic equations these relations yield an expression for the variation with time of the amplitude of an acceleration wave. This in turn leads to a condition for shock wave formation. The results are generalizations of a result given byBürger for the time of formation of a plane shock wave. They are, moreover, in formal agreement with results given byVarley et al. for acceleration waves in viscoelastic materials with fading memory for which the thermodynamic equations of state are given explicitly in form of functionals.
    Notes: Übersicht Die Aufsteilung von Beschleunigungswellen zu Verdichtungsstößen wird für ebene, zylinder- und kugelsymmetrische Bewegung eines Gases untersucht, in dem beliebig viele thermodynamische Relaxations-vorgänge ablaufen. Die von dem relaxierenden Gas durchlaufenen thermodynamischen Zustände werden implizit durch Einführung zusätzlicher unabhängiger thermodynamischer Variablen und Vorgabe von Relaxations-gleichungen für diese Variablen beschrieben. Kombination der Zustandsgleichungen mit den aus Kontinuitätsund Impulssatz folgenden Bedingungen für die Ausbreitung einer Unstetigkeit in der Beschleunigung ergibt einen Ausdruck für die Zeitabhängigkeit der Amplitude einer Beschleunigungswelle. Hieraus kann eine Bedingung für die Verdichtungsstoßentstehung hergeleitet werden. Die Ergebnisse sind Verallgemeinerungen eines vonBürger für ebene Bewegung gefundenen Resultats für die Entstehungszeit eines Stoßes. Sie stimmen formal überein mit den vonVarley et al. angegebenen Resultaten für Beschleunigungswellen in viskoelastischen Materialien mit schwindendem Gedächtnis, deren Zustandsgleichungen explizit in Funktionalform vorgegeben sind.
    Type of Medium: Electronic Resource
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