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  • 1990-1994
  • 1985-1989  (8)
  • 1950-1954
  • 1989  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Spectroscopic investigation of oxide states responsible for hot-carrier degradation (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 168-169 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Hole-trap states in the gate oxide of a Si metal-oxide-semiconductor field-effect transistor (MOSFET) are investigated by inhomogeneous excimer laser irradiation. Subbandgap ultraviolet light photons with an energy exceeding a threshold lying between 5.5 and 6.4 eV were found to excite electrons from these originally neutral states into the SiO2 conduction band. A fixed positive charge is left behind. The degradation in MOSFET performance due to the irradiation is comparable to that accompanying hot-hole injection. Also, subsequent hot-electron stress changes the device characteristics in a way similar to hot-electron stress following hot-hole stress. It is concluded that the traps responsible for hot-carrier degradation cause the optically induced charge trapping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101218
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Verletzungsdynamik des geworfenen, spitz-scharfen Wurfsterns (1989)
    Springer
    International journal of legal medicine 102 (1989), S. 143-148 
    Details
    ISSN: 1437-1596
    Keywords: Traumatology ; Asiatic shurikens ; Dynamics of injuries ; Stich-Schnittdynamik ; asiatische Wurfsterne ; Traumatologie, Verletzungen durch Wurfstern
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Mit Hilfe einer Hochfrequenzkamera wurden Translationsgeschwindigkeit und Rotationsgeschwindigkeit eines geworfenen, stilettartig spitzen und geschärften Wurfsterns ermittelt, um mit diesen Geschwindigkeiten die Auftreffenergie des Wurfsterns zu berechnen. Die dabei gewonnenen Ergebnisse beweisen, daß durch diese Wurfsterne tödliche Eindringtiefen in den Körper zu erzielen sind. Der Handel mit diesen „Sportgeräten“ sollte gesetzlich untersagt werden.
    Notes: Summary In 10 tests, the linear velocity and rotation frequency of a thrown, pointed, razor-sharp shuriken were investigated using a high-speed camera. The linear velocity (5.1–9.87 m/s) and rotation frequency (0–4.46 m/s) determine the impact (0.91–3.6 nm) of this Asiatic weapon. An impact of 3.6 Nm is sufficient to cause a penetration depth of more than 3.5 cm within the regio ossis temporalis, the regio collis lateralis and the regio intercostalis. Legally, the use of this new generation of pointed, razor-sharp shurikens should be prohibited as “sports” apparatus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00200508
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Der spontane endogene LH-Anstieg im stimulierten Zyklus (1989)
    Springer
    Archives of gynecology and obstetrics 245 (1989), S. 994-999 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02417653
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Endogenousd-glucose transport in oocytes ofXenopus laevis (1989)
    Springer
    The journal of membrane biology 111 (1989), S. 93-102 
    Details
    ISSN: 1432-1424
    Keywords: Xenopus oocyte ; glucose ; cotransport ; flux ; voltage clamp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Endogenous glucose uptake by the oocytes ofXenopus laevis consists of two distinct components: one that is independent of extracellular Na+, and the other one that represents Na+-glucose cotransport. The latter shows similar characteristics as 2 Na+-1 glucose cotransport of epithelial cells: The similarities include the dependencies on external concentrations of Na+, glucose, and phlorizin, and on pH. As in epithelial cells, the glucose uptake in oocytes can also be stimulated by lanthanides. Both the electrogenic cotransport and the inhibition by phlorizin are voltage-dependent; the data are compatible with the assumption that the membrane potential acts as a driving force for the reaction cycle of the transport process. In particular, hyperpolarization seems to stimulat transport by recruitment of substrate binding sites to the outer membrane surface. The results described pertain to oocytes arrested in the prophase of the first meiotic division; maturation of the oocytes leads to a downregulation of both the Na+-independent and the Na+-dependent transport systems. The effect on the Na+-dependent cotransport is the consequence of a change of driving force due to membrane depolarization associated with the maturation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01869212
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Prognostisch relevante Faktoren beim Carcinom der Papilla Vateri (1989)
    Springer
    Langenbeck's archives of surgery 374 (1989), S. 358-362 
    Details
    ISSN: 1435-2451
    Keywords: Cancer ; Vater's papilla ; Prognosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zur überprüfung der für die Prognose des Papillencarcinoms relevante Faktoren wurde das eigene Krankengut vom 1. 1. 1978 bis zum 31. 12. 1987 retrospektiv analysiert. In dem genannten Zeitraum wurden 32 Patienten mit einem Carcinom der Papilla Vateri behandelt. überprüft wurde der Einfluß von Alter, Geschlecht, Anamnesedauer, Tumorgröße, Tumormorphologie und Tumorstadium auf die Prognose. Die 5-Jahres-Überlebensrate betrug nach partieller Duodenopankreatektomie 56,1 %. Die Prognose war statistisch signifikant von der Tumorgröße, dem Vorliegen von Lymphknotenmetastasen und dem Tumorstadium abhängig.
    Notes: Summary In order to evaluate the relevant factors for prognosis for patients with cancer of Vater's papilla our own patient material between 1. 1. 1978 and 31. 12. 1987 was studied retrospectively. The influence of age, sex, duration of anamnesis, tumor size, tumor morphology and tumor stage on the prognosis were analyzed in 32 patients with cancer of Vater's papilla. The 5 year survival rate after Whipple procedure was 56.1 %. Statistically significant factors for prognosis were tumor size, lymph node metastases and tumor stage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01262815
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Quantum Monte Carlo study of a one dimensional two band fermion model (1989)
    Springer
    The European physical journal 74 (1989), S. 289-294 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A Quantum Monte Carlo investigation of a one-dimensional two band model with strong correlations in one band is presented. This two band model can be considered as a one-dimensional realization of the highT c cuprates. In particular, the densities in the two bands, the formation of magnetic moments and the spin-spin correlations are studied as a function of particle number. The Quantum Monte Carlo results are compared with a simple mean field theory describing antiferromagnetic correlations, a variational Gutzwiller type calculation and a mapping to an effective one band model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307875
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetic relaxation spectra of YbPd2Si2 (1989)
    Springer
    The European physical journal 76 (1989), S. 229-233 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present the results of inelastic neutron scattering experiments on the intermediate-valent system YbPd2Si2 to investigate the magnetic relaxation behaviour. We have performed measurements on polycrystalline samples with neutrons of incident energyE 0=3.1 meV at temperatures between 1.5 K and 250 K, and withE 0=12.7 meV andE 0=50.8 meV at temperatures between 5 K and 50 K using time-of-flight spectrometers. At temperaturesT〉50 K we find a pure quasielastic magnetic response with a rather broad linewidth typical for intermediate-valent systems. AtT≈50 K an inelastic excitation line appears at about 21 meV; its intensity increases with decreasing temperature. In the same temperature range (T〈50 K) the quasielastic linewidth decreases rapidly and atT=5 K the quasielastic response has been apparently transformed to a second inelastic feature at about 4.7 meV. The width of this low-energy excitation fits well to the temperature dependence of the quasielastic linewidth forT〉5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01312689
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic relaxation spectra of EuNi2P2 (1989)
    Springer
    The European physical journal 77 (1989), S. 105-110 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on inelastic neutron scattering experiments on EuNi2P2 prepared from153Eu-isotopes. The sample was checked by Mössbauer spectroscopy; a “satellite” phase of about 4% was found. The neutron scattering experiment was performed with thermal neutrons. AboveT=50 K a strong quasielastic magnetic line was detected with a nearly temperature independent width of about 6 meV. At low temperatures the spectrum changes to an inelastic character with a distinctQ-dependence in the intensity. For comparison static susceptibility and magnetization measurements were performed down to 250 mK.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313626
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    Paper (German National Licenses)
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