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  • 1
    Electronic Resource
    Electronic Resource
    Stationäre Ortskurven derhpn- undhsz-Komponenten (1986)
    Springer
    Electrical engineering 69 (1986), S. 41-48 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents By means ofhpn- andhsz-components power system analysis can be carried out with minimal effort and measuring results have maximum contents of information. The most important elementary space-phasors of real time-functions are given inhpn- andhsz-components.
    Notes: Übersicht Inhpn- undhsz-Komponenten lassen sich Netzberechnungen mit minimalem Aufwand durchführen und Meßgrößen mit maximalem Informationsgehalt gewinnen. Es werden die wichtigsten elementaren Ortskurven reeller Zeitfunktionen inhpn- undhsz-Komponenten angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573979
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Berechnung der Netzrückwirkungen von Stromrichteranlagen mit Raumzeigern (1987)
    Springer
    Electrical engineering 70 (1987), S. 291-301 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Calculating transients in power systems it is advantageous to use symmetrical components. The example of the most common three-phase bridge converter shows that also current converters can be described in space phasors. With respect to the characteristics of conducting valves the networks and the conditions of firing and commutation ending are deduced. Numerically calculated results agree with measurements. A parameter study shows the typical space phasor curves of bridge converter currents.
    Notes: Übersicht Dynamische Netzberechnungen lassen sich vorteilhaft in Drehstrom-Modalkomponenten durchführen. Das Beispiel der meistgebräuchlichen Drehstrom-Brückenschaltung zeigt, daß auch Stromrichter mit Raumzeigern beschrieben werden können. Unter Berücksichtigung der Eigenschaften stromführender Ventile werden die Ersatzschaltpläne sowie die Zünd- und Löschbedingungen in Modalkomponenten hergeleitet. Die Ergebnisse numerischer Berechnungen stimmen mit Messungen überein. Eine Parameterstudie zeigt die für Brückenschaltungen typischen Stromortskurven in Modalkomponenten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01574134
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  • 3
    Electronic Resource
    Electronic Resource
    HTLV-III antibody prevalence among young delinquent drug abusers in long-term residential treatment at a north-German drug clinic (1987)
    Springer
    Journal of molecular medicine 65 (1987), S. 22-26 
    Details
    ISSN: 1432-1440
    Keywords: Intravenous drug abusers ; Acquired immunodeficiency syndrome ; Immunocompetence ; Longitudinal study ; LAV/HTLV-III
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To date, long-term intravenous drug users studied at regional European centers of illicit drug use have had a high number of LAV/HTLV-III infections. Among 200 patients remanded by court or referred from prison to a special clinic in northern Germany for young delinquent drug abusers, 26 (17%) of 157 IV drug abusers were HTLV-III seropositive. With 40% seropositive, female patients showed a significantly higher prevalence of HTLV-III infection than males. The results of longitudinal serological, immunological, and clinical observations over periods of 12 months and 2–3 years indicate that under conditions of continuous medical surveillance, sound preventive counseling, and steady therapeutic care during long-term coeducative residential treatment of drug abusers, neither detectable HTLV-III transmission nor definite progression of HTLV-III induced impairment of immune regulatory functions must ensue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01785522
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  • 4
    Electronic Resource
    Electronic Resource
    Observations on rock boring by Alpheus saxidomus (Crustacea: Alpheidae) (1985)
    Springer
    Marine biology 89 (1985), S. 213-219 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This study describes some aspects of the distribution, ecology, and rock boring behaviour of the shrimp Alpheus saxidomus Holthuis from the Pacific coast of Costa Rica. This species has a typical hammer-shaped dactylus on the first right pereiopod of females and males that shows tracks of abrasion at the hammer-head. Structural analysis of this hammer-dactylus proved that it is suited for the mechanical treatment of rocks. The very thick and calcified cuticle of the hammer is mostly formed by the sclerotinized, hard exocuticle, which has abundant pore canals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392891
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  • 5
    Electronic Resource
    Electronic Resource
    Measurement of laser light thomson-scattered from a cooling electron beam (1987)
    Springer
    Applied physics 44 (1987), S. 87-92 
    Details
    ISSN: 1432-0649
    Keywords: 41.80E ; 52.25 ; 29.15D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract First results are presented from an experiment scattering laser light from a relativistic electron beam. The 5 cm diameter continuous electron beam of 28 keV kinetic energy and 2.6 A current presents an electron gas of a density of 8×107 cm−3, from which 20 ns pulses of laser light (490 nm) were scattered at a repetition rate of 15 Hz and an average power of 20 mJ per pulse. The Doppler-shifted wavelength of photons backscattered under 180° was analysed with a Fabry-Perot interferometer. This technique provides, for the first time, a non-destructive measurement of the velocity distribution in an electron beam radially resolved in space. The results presented here comprise the direct measurement of the absolute electron energy and the degree of space-charge compensation in the electron beam. The determination of an upper bound of 10−2 for the ratio of longitudinal to transverse electron temperature implies the first direct measurement of a flattened velocity distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694198
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    TMX-U computer system in evolution (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1880-1882 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Over the past three years, the total TMX-U diagnostic data base has grown to exceed 10 Mbytes from over 1300 channels; roughly triple the originally designed size. This acquisition and processing load has resulted in an experiment repetition rate exceeding 10 min per shot using the five original Hewlett–Packard HP-1000 computers with their shared disks. Our new diagnostics tend to be multichannel instruments, which, in our environment, can be more easily managed using local computers. For this purpose, we are using HP series 9000 computers for instrument control, data acquisition, and analysis. Fourteen such systems are operational with processed format output exchanged via a shared resource manager. We are presently implementing the necessary hardware and software changes to create a local area network allowing us to combine the data from these systems with our main data archive. The expansion of our diagnostic system using the parallel acquisition and processing concept allows us to increase our data base with a minimum of impact on the experimental repetition rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139159
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  • 7
    Electronic Resource
    Electronic Resource
    Database tools for enhanced analysis of TMX-U data (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1929-1931 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A commercial database software package has been used to create several databases and tools that assist and enhance the ability of experimental physicists to analyze data from the Tandem Mirror Experiment-Upgrade (TMX-U) experiment. This software runs on a DEC-20 computer in M-Divisions's User Service Center at Lawrence Livermore National Laboratory (LLNL), where data can be analyzed off line from the main TMX-U acquisition computers. When combined with interactive data analysis programs, these tools provide the capability to do batch-style processing or interactive data analysis on the computers in the USC or the supercomputers of the National Magnetic Fusion Energy Computer Center (NMFECC) in addition to the normal processing done by the TMX-U acquisition system. One database tool provides highly reduced data for searching and correlation analysis of several diagnostic signals within a single shot or over many shots. A second database tool provides retrieval and storage of unreduced data for use in detailed analysis of one or more diagnostic signals. We will show how these database tools form the core of an evolving off-line data analysis environment on the USC computers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138799
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Dual dielectric silicon metal-oxide-semiconductor field-effect transistors as radiation sensors (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1972-1976 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new design for radiation-sensing field-effect transistors (RADFETs) is presented, involving the use of very thick silicon nitride layers deposited on top of a high-quality thermal silicon dioxide. In contrast to previous RADFET fabrication procedures, no attempt was made to introduce hole traps into the thermal oxide. Instead the trapping layer at the nitride oxide interface was used to store the positive charge which forms the basis for operation of the RADFET. Data is presented which shows hole transport in the thermal oxide. Models explaining the field dependence of the response and the saturation behavior of the dual dielectric device are given. These RADFETs are more stable than any previously described in the literature and have a sensitivity of 86 μV/rad dose at room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342887
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Omeprazole (20 mg o.m.) versus ranitidine (150 mg b.d.) in duodenal ulcer healing and pain relief (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 3 (1989), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The object of this double-blind, multicentre study was to compare duodenal ulcer healing rates after 2 and 4 weeks of treatment with either 20 mg omeprazole o.m. or 150 mg ranitidine b.d. One hundred and eighty-one patients were randomized: 91 received omeprazole and 90 received ranitidine.In a per protocol analysis at 2 weeks, 63% of the patients were healed on omeprazole and 65% of the patients were healed on ranitidine (N.S.); at 4 weeks 91% were healed in the omeprazole group and 96% were healed in the ranitidine group. There were no differences in ulcer symptom relief between the two groups. There were no significant changes in laboratory values in either of the groups. Adverse events were few and mainly mild and transient.We conclude that both omeprazole (20 mg o.m.) and ranitidine (150 mg b.d.) result in rapid, ulcer healing rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.1989.tb00235.x
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  • 10
    Electronic Resource
    Electronic Resource
    Approximation of a set of points by points of a grid (1987)
    Springer
    Computing 38 (1987), S. 341-345 
    Details
    ISSN: 1436-5057
    Keywords: Approximation ; n-dimensional grid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Es wird ein Verfahren zur Bestimmung einer Translation eines rechtwinkeligen Gitters mit der Eigenschaft, daß eine endliche Punktmenge des ℝN möglichst gut durch Gitterpunkte approximiert wird, angegeben.
    Notes: Abstract A procedure is given for translating a rectangular grid in such a way that a finite set of points in ℝN is approximated as good as possible by points of the translated grid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278711
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    Paper (German National Licenses)
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