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  • 1995-1999  (5)
  • 1
    Electronic Resource
    Electronic Resource
    An intercomparison between the GSWM, UARS, and ground based radar observations: a case-study in January 1993 (1997)
    Springer
    Annales geophysicae 15 (1997), S. 1123-1141 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The Global-Scale Wave Model (GSWM) is a steady-state two-dimensional linearized model capable of simulating the solar tides and planetary waves. In an effort to understand the capabilities and limitations of the GSWM throughout the upper mesosphere and thermosphere a comparative analysis with observational data is presented. A majority of the observational data used in this study was collected during the World Day campaign which ran from 20 January to 30 January 1993. During this campaign data from 18 ground-based observational sites across the globe and two instruments located on the UARS spacecraft were analyzed. Comparisons of these data with the simulations from the GSWM indicate that the GSWM results are in reasonable agreement with the observations. However, there are a number of cases where the agreement is not particularly good. One such instance is for the semidiurnal tide in the northern hemisphere, where the GSWM estimates may exceed observations by 50%. Through a number of numerical simulations, it appears that this discrepancy may be due to the eddy diffusivity profiles used by the GSWM. Other differences relating to the diurnal tide and the quasi-two-day wave are presented and discussed. Additionally, a discussion on the biases and aliasing difficulties which may arise in the observational data is alos presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-997-1123-x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    PMSE observations at three different frequencies in northern Europe during summer 1994 (1997)
    Springer
    Annales geophysicae 14 (1997), S. 1317-1327 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Simultaneous observations of polar mesosphere summer echoes (PMSE) have been carried out during summer 1994 in northern Norway using three radars on different frequencies: the ALOMAR SOUSY radar at Andenes on 53.5 MHz, the EISCAT VHP radar at Tromsø on 224 MHz and the MF radar at Tromsø on 2.78 MHz. During the common measuring period in July/August 1994, PMSE could be detected at 224 and 53.5 MHz, and there are strong hints that PMSE also occur at 2.78 MHz. Reliable correlations between hourly backscattered power values indicate that the PMSE structures have zonal extensions of more than 130 km and can be detected at very different scales (half wavelength) between 0.67 (EISCAT VHP radar) and 54 m (MF radar). Using the wind values derived by the MF radar it can be shown that the mesospheric wind field influences the structure of PMSE. The diurnal variation of PMSE is strongly connected with tidal-wind components, whereas spatial differences of PMSE can partly be explained by the mean wind field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-996-1317-7
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Gravity wave signatures at mesopause heights (1997)
    Springer
    Annales geophysicae 14 (1997), S. 1186-1191 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The ALOMAR SOUSY Radar operated at 53.5 MHz has been used in a five-beam configuration to study dynamical processes at gravity wave periods in the summer polar mesosphere. A case study of a gravity wave with a period of about 9 min is presented and analysed in some detail. The three-dimensional wave number vector is determined from the phase information of the 9-min velocity oscillations obtained in all beam directions and all range gates. The horizontal wavelengths in the north and east direction are estimated to be about 60 and 50 km, respectively. The echo power variations, simultaneously observed at different beam pointing positions, are investigated using cross-correlation analysis. The results show that these wave-associated variations lead to horizontal and vertical deformation of the echoing layers. The horizontal wavelength in the north-south direction, derived from the echo power modification, is in good agreement with the one obtained from the velocity analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-996-1186-0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Visual Feature Integration and the Temporal Correlation Hypothesis (1995)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Neuroscience 18 (1995), S. 555-586 
    Details
    ISSN: 0147-006X
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ne.18.030195.003011
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Prinzipien der Entwöhnung von illegalen Drogen unter stationärer Therapie (1999)
    Springer
    Der Internist 40 (1999), S. 634-639 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Drogenabhängigkeit ; Therapie ; Sucht ; Therapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Konzepte zur Entwöhnung von harten Drogen können nur dann langfristig erfolgreich sein, wenn sie die intrapsychische Entwicklung von Drogenabhängigen berücksichtigen, im sozialen Umfeld zum Aufbau normaler und differenzierter Beziehungen führen und schließlich die Umsetzung eigener Ziele in einer realen Welt ermöglichen, z.B. die Wiederaufnahme der Arbeit. Voraussetzung ist natürlich die Entgiftung und Gesundung des Körpers. Während ersteres vergleichsweise unproblematisch ist, sollte die somatische Komponente der meist völlig Verwahrlosten und zudem oft mit chronischer Hepatitis oder HIV Infizierten nicht unterschätzt werden. An dieser Stelle wird zunächst über die Ausgangsposition unter somatischen, psychopathologischen und psychosozialen Gesichtspunkten berichtet. Bezüglich der Therapieoptionen ist die Motivation der (noch) Abhängigen ebenso wichtig wie die Zuwendung der Therapeuten. Eine prinzipielle Schwierigkeit besteht natürlich darin, daß mit dem Beginn der Therapie vom Drogenabhängigen etwas erreicht werden soll, was eigentlich erst am Schluß eintreten kann. Die wichtigsten Behandlungsansätze und -elemente werden eingehend und kritisch erläutert, wobei auch schwierige Phasen im Therapieverlauf besprochen werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050382
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    Paper (German National Licenses)
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