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  • 1
    Keywords: Physics ; Mechanics ; Physics ; Physics ; Physics, general ; Konferenzschrift ; Allgemeine Relativitätstheorie ; Differentialgeometrie ; Globale Differentialgeometrie ; Allgemeine Relativitätstheorie ; Infinitesimalgeometrie ; Allgemeine Relativitätstheorie
    Description / Table of Contents: Techniques of topology and differential geometry in general relativity -- A simple derivation of the general redshift formula -- Some remarks on a radiating solution of the Einstein-Maxwell equations -- Conservation laws on manifolds -- Structure of singularities -- Lattice transformations and charge quantization -- On an Einstein-Maxwell field with a null source -- The luminosity of a collapsing star -- A class of inextendible Weyl solutions -- Scaling in function spaces -- On the spherical symmetry of a static perfect fluid -- Differentiable manifolds with singularities -- Non-vacuum ADaM field equations -- General relativity as a dynamical system on the manifold a of Riemannian metrics which cover diffeomorphisms
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 191 p)
    Edition: Springer eBook Collection. Physics and Astronomy
    ISBN: 9783540374343 , 9783540057932
    Series Statement: Lecture Notes in Physics 14
    RVK:
    RVK:
    Language: English
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  • 2
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (13 p., 1,43 Mb.) , ill., graphs
    Edition: [Elektronische Ressource]
    Language: German
    Note: Differences between the printed and electronic version of the document are possible. - Contract BMBF 05 SB8BDA/6. - nIndex. - nBibliography p. 12 - 13 , Also available as printed version , Systemvoraussetzungen: Acrobat Reader.
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  • 3
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: 14 p. = 113742 B., text and images
    Edition: [Electronic ed.]
    Language: German
    Note: Differences between the printed and electronic version of the document are possible , Contract no. BMBF 05 605BDA 0
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  • 4
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: 13 p. = 165370 B., text
    Edition: [Electronic ed.]
    Language: German
    Note: Differences between the printed and electronic version of the document are possible , Contract no. BMBF 05 625BDA 3
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  • 5
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    Geozon Science Media
    Publication Date: 2022-08-05
    Description: Von den drei wichtigsten feldgeologischen Elementen, die zur Gliederung des Jungpleistozäns herangezogen werden können (Löß, Terrassen, Jungmoränen) werden hier die beiden ersten behandelt. Die Lösse sind in Österreich auf das Alpenvorland und auf das Wiener Becken beschränkt. Auf Grund typologischer Unterschiede innerhalb der fossilen Böden (im Löß) kann eine Gliederung in drei Räume getroffen werden (vergl. Abb. 1), die auch für die rezenten Böden (aus Löß) gilt: Im W liegt die humid beeinflußte „Feuchte Lößlandschaft", im mittleren Teil das „Übergangsgebiet" und im E die „Trockene Lößlandschaft". Abb. 5a und b vermitteln Sammelprofile für die feuchte Lößlandschaft, 5c für die trockene; das Übergangsgebiet wird nicht im Detail behandelt. Eine charakteristische Abfolge kehrt in allen Profilen wieder und darf einander gleichgesetzt werden: In der feuchten Lößlandschaft ist es ein Unterboden vom Typus sol lessivé, dem ein Fließerdepaket aufliegt, im trockenen Raum eine Verlehmungszone mit mehreren durch Lößzwischenlagen getrennten Humuszonen darüber. Es werden die Namen „Linzer" bzw. „Stillfrieder Komplex" für diese Abfolgen vorgeschlagen. Anschließend werden andere mittel- und westeuropäische Räume zum Vergleich herangezogen und der Beweis erbracht, daß diese Abfolge eine regionale Bedeutung besitzt (vergl. Abb. 6, 7 und 8). Im Hinblick auf die Gruppierung der Terrassen ergibt sich eine Gliederung in den „gletschernahen" und „gletscherfernen" Raum, deren geographische Verbreitung ungefähr mit dem Feucht- und Trockengebiet der Lösse zusammenfällt. Im gletschernahen Bereich sind wir gezwungen, die Nomenklatur von A. Penck zu verwenden. Hier ist die starke Aufgliederung der Niederterrasse in verschiedene Teilfelder auffallend, der aber nur eine rein lokale Bedeutung zukommt. Dagegen ist nur eine Hochterrasse ausgebildet, dann wieder eine Reihe altpleistozäner Terrassen (vergl. Abb. 9a). Im gletscherfernen Raum hingegen ist nur mehr eine große Niederterrasse ( — Praterterrasse) vorhanden, über der eine zweite, morphologisch völlig verschiedene Terrasse ( = Gänserndorfer T.) folgt. Letztere ist gegenüber den mittleren Terrassen und diese wieder gegenüber den altpleistozänen deutlich abgesetzt (vergl. Abb. 9b). Im gletscherfernen Bereich dürfen vorläufig nur Lokalnamen verwendet werden, da die Korrelation mit dem anderen Raum noch nicht völlig gesichert ist. Die Verlehmungszone des Stillfrieder Komplexes fällt in die Zäsur zwischen Prater- und Gänserndorfer Terrasse, die Humuszonen entsprechen der beginnenden letzten „Kaltzeit", die mit einer kräftigen Solifluktionsperiode einsetzt. Diese Solifluktion tritt im Trockengebiet nicht allzu stark in Erscheinung (so daß die Humuszonen mit den Lößzwischenlagen autochthon geblieben sind), während in der feuchten Lößlandschaft diese Zeit durch das mächtige Fließerdepaket charakterisiert ist.
    Description: research
    Keywords: ddc:551.7
    Language: German
    Type: doc-type:article , publishedVersion
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  • 6
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 1930-1934 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Optical absorption, Raman, and infrared (IR) spectra of undoped polyparaphenylene (PPP) have been studied under pressure up to 20 GPa at 300 K. PPP shows stable behavior, in marked contrast to the reactivity observed in trans-polyacetylene under pressure. The absorption edge of PPP shifts to lower energy with a total shift of 0.55 eV at 20 GPa. Raman spectra reveal a new band at about 820 cm−1 which becomes active above ∼5 GPa. At high pressure we find a considerable broadening of the infrared-active out-of-plane mode at 805 cm−1. The results are in part interpreted in terms of the larger interchain coupling induced by pressure.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 4872-4878 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a study of the interface properties of the molecular organic semiconductor copper phthalocyanine (CuPC) on single crystalline as well as polycrystalline Au using photoemission spectroscopy. Despite the different orientation of the molecules on the two substrates, the observed energy level alignment is identical. We observe the formation of an interface dipole while band bending is very small. In addition, we have carried out complementary studies of the CuPC/GeS(001) interface to pin down photoemission final state effect contributions to the observed energy level shifts. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 466-469 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied the molecular orientation of the commonly used organic semiconductor copper phthalocyanine (CuPC) grown as thin films on the technically relevant substrates indium tin oxide, oxidized Si, and polycrystalline gold using polarization-dependent x-ray absorption spectroscopy, and compare the results with those obtained from single crystalline substrates [Au(110) and GeS(001)]. Surprisingly, the 20–50 nm thick CuPC films on the technical substrates are as highly ordered as on the single crystals. Importantly, however, the molecular orientation in the two cases is radically different: the CuPC molecules stand on the technical substrates and lie on the single crystalline substrates. The reasons for this and its consequences for our understanding of the behavior of CuPC films in devices are discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 5433-5441 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A spatially scanning, combined vacuum-ultraviolet (VUV) and visible range spectrometer system for the spectroscopy of tokamak plasmas in the ASDEX-Upgrade experiment is described. This system is designed to allow flexible observation of about 2/3 of the boundary plasma using VUV (30–200 nm) and visible range spectrometers viewing along a common line of sight which can be scanned during the plasma discharge by means of a rotatable mirror. From successive spectra recorded using intensified, multichannel photodiode detectors and the recorded position data, spatial profiles of the plasma emission can be reconstructed. Because radiation losses from the boundary plasma can largely be attributed to line emission in the VUV spectral region, this instrument finds application in quantitative studies of radiation loss processes as well as to studies of impurity production and transport. Simultaneous observation in the visible spectral range facilitates an in situ absolute calibration of the VUV instrument by means of the "branching-ratios'' technique. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The cytokines leukemia inhibitory factor (LIF) and ciliary neurotrophic factor (CNTF) have been implicated in determination of neuronal phenotype as well as promotion of neuronal survival. However, the intracellular mechanisms by which their signals are transduced remain poorly understood. We have previously studied the regulation of vasoactive intestinal polypeptide gene expression by LIF and CNTF in the NBFL neuroblastoma cell line. Because these cytokines induce tyrosine phosphorylation that may lead to Ras activation, we explored a possible role for Ras in LIF- and CNTF-induced signal transduction. In NBFL cells LIF increases activated Ras in a rapid, transient, and concentration-dependent manner. CNTF and a related cytokine, oncostatin M, produce similar increases. CNTF and LIF also increase activated Ras in neuron-enriched dissociated cultures of sympathetic ganglia. Moreover, these cytokines rapidly and transiently induce specific tyrosine-phosphorylated proteins, p165 and p195. The protein kinase inhibitors K252a and staurosporine block LIF-induced increases in tyrosine phosphorylation, activated Ras, and vasoactive intestinal polypeptide mRNA in NBFL cells. These data support a possible role for Ras in the cell differentiation effects of LIF and CNTF.
    Type of Medium: Electronic Resource
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