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  • Articles: DFG German National Licenses  (2)
  • 2000-2004  (1)
  • 1995-1999  (1)
  • Key words Psychiatry  (1)
  • PACS. 05.30.-d Quantum statistical mechanics[:AND:] 05.40.-a Fluctuation phenomena, random processes, noise and Brownian motion - 33.80.Be Level crossing and optical pumping  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 2000-2004  (1)
  • 1995-1999  (1)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Dissipation, decoherence and preparation effects in the spin-boson system (1999)
    Springer
    The European physical journal 10 (1999), S. 719-729 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 05.30.-d Quantum statistical mechanics[:AND:] 05.40.-a Fluctuation phenomena, random processes, noise and Brownian motion - 33.80.Be Level crossing and optical pumping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The dynamics of the reduced density matrix of the driven dissipative two-state system is studied for a general diagonal/off-diagonal initial state. We derive exact formal series expressions for the populations and coherences and show that they can be cast into the form of coupled nonconvolutive exact master equations and integral relations. We show that neither the asymptotic distributions, nor the transition temperature between coherent and incoherent motion, nor the dephasing rate and relaxation rate towards the equilibrium state depend on the particular initial state chosen. However, in the underdamped regime, effects of the particular initial preparation, e.g. in an off-diagonal state of the density matrix, strongly affect the transient dynamics. We find that an appropriately tuned external ac-field can slow down decoherence and thus allow preparation effects to persist for longer times than in the absence of driving.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050903
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Externe Qualitätssicherung der stationären Behandlung schizophrener Patienten Ergebnisse einer multizentrischen Studie (2000)
    Springer
    Der Nervenarzt 71 (2000), S. 364-372 
    Details
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Psychiatrie ; Qualitätssicherung ; Qualitä,tsindikatoren ; Rückmeldesystem ; Key words Psychiatry ; Quality assurance ; Quality indicators ; Feedback system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Due to legal regulations, external quality assurance is mandatory in Germany. Supported by the German Health Ministry (BMG),we present the results of a multicenter study in four hospitals with different structures on 1042 inpatients with the trace diagnosis of schizophrenia (ICD 10). We defined disease-specific indicators of structure, process, and outcome quality, developed an assessment instrument, and implemented a feedback system for quality comparison. The resulting quality profiles are useful as a starting point for internal quality management.
    Notes: Zusammenfassung In einem vom BMG geförderten 2-jährigen Projekt wurde anhand von insgesamt 1042 Behandlungsfällen an 4 psychiatrischen Kliniken unterschiedlicher Struktur in Nordrhein-Westfalen die Voraussetzung für eine externe Qualitätssicherung mit Hilfe der Tracer-Diagnose Schizophrenie geschaffen und durchgeführt. Ziele waren die Evaluation eines Erhebungsinstrumentariums, die Entwicklung von Qualitätsindikatoren und der Aufbau eines Rückmeldesystems zur Optimierung des internen Qualitätsmanagements. Anhand der erhobenen Daten ist es auf wissenschaftlich-statistischer Basis gelungen, Qualitätsindikatoren und eine vergleichende Art der Rückmeldung zu entwickeln, die neben Ergebnisvariablen auch Struktur-, Patienten- und Prozessvariablen beinhaltet. Diese Qualitätsprofile bilden einen wesentlichen Ausgangspunkt für krankheitsspezifische Problemanalysen im Rahmen eines internen Qualitätsmanagements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001150050570
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    Paper (German National Licenses)
    Fulltext
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