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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 1319-1324 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An experimental device is reported that utilizes time-correlated nanosecond light pulses in combination with photoionization mass spectrometry. A primary light pulse is generated by a tunable dye laser in the ultraviolet regime, which photolyzes neutral gas targets under collision free conditions. Subsequently, a time-correlated extreme ultraviolet-light pulse comes from a laser-produced plasma that is monochromatized in the 10–25 eV regime. The photolysis products are ionized by one-photon absorption, so that the cations are finally detected by time-of-flight mass spectrometry. The performance of this experimental approach is characterized by investigating the primary photolysis products of chlorine dioxide. Finally, possible applications of this approach are briefly discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Nervenarzt 71 (2000), S. 573-579 
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Typus melancholicus ; Typus migraenicus ; Prämorbide Persönlichkeit ; Migräne ; Unipolare Depression ; Key words Typus melancholicus ; Typus migraenicus ; Premorbid personality ; Migraine ; Unipolar depression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract In an earlier published study [16, 17, 18], it was demonstrated that migraine sufferers have personality traits significantly more strongly associated with the typus melancholicus than healthy individuals and patients with other mental and physical illnesses. They display a fixation on tidiness which manifests itself in an excessive striving for quality and quantity in performance-oriented situations. The main features of their social relationships are excessive helpfulness combined with an exaggerated tendency towards guilt avoidance and symbiotic attachment to their own families. They do not differ from unipolar depressives in these respects. The major aim of the new study is to examine whether the concept of the typus melancholicus in relation to migraine sufferers as proposed in the first study is adaptable to explaining the personality characteristics of migraine sufferers (“typus migraenicus”). Age-matched samples of 42 female migraine sufferers, 40 female patients with unipolar depression, and 41 female control subjects took part in the new study. The test instruments used were von Zerssen's Munich Personality Test (MPT) and a questionnaire specially designed by the first author for assessing the typus migraenicus (German “Fragebogen zur Erfassung des Typus migraenicus,” or FETM). The results obtained using univariate and multivariate analyses demonstrate a confirmation of the typus migraenicus concept, although to a less pronounced degree than the previous study. This can be seen as supporting evidence that, independently of the study sample and the investigators, migraine sufferers display with higher random frequency a personality profile very similar to the premorbid personality structure in unipolar depressives.
    Notes: Zusammenfassung In einer früheren Untersuchung [16, 17, 18] konnte gezeigt werden, dass Migräniker in ihrer Persönlichkeitsausprägung gegenüber Normalpersonen sowie Patienten mit anderweitigen seelischen und körperlichen Erkrankungen signifikant stärkere Ausprägungen von Typus-melancholicus-Eigenschaften aufweisen (Festgelegtsein auf Ordentlichkeit, sich manifestierend im Beruf als Übermaß von Qualität und Quantität von Leistung, gegenüber Mitmenschen als Übermaß an Hilfsbereitschaft mit übertriebener Tendenz zur Schuldvermeidung und gegenüber der eigenen Familie als symbiontische Anhänglichkeit), während sie sich diesbezüglich von monopolar Depressiven nicht unterscheiden. Zur Überprüfung des damit erstmals objektivierten Konzepts des Typus melancholicus bei Migränikern (“Typus migraenicus”) wurde nun eine erneute Untersuchung durchgeführt an altersgematchten Stichproben von 42 Migränikerinnen, 40 Patientinnen mit einer monopolaren Depression und 41 weiblichen Kontrollpersonen. Als Testinstrumente kamen wie in der Voruntersuchung der Münchner Persönlichkeitstest (MPT) von v. Zerssen und ein vom Erstautor eigens konstruierter Fragenbogen zur Erfassung des Typus migraenicus (FETM) zur Anwendung. Als Ergebnis zeigte sich aufgrund uni- und multivariater Verfahren eine neuerliche Bestätigung des Typus-migraenicus-Konzepts, wenn auch in einem im Vergleich zur Voruntersuchung geringeren Ausprägungsgrad. Dies kann als Beleg dafür angesehen werden, dass Migränepatienten auch unabhängig von der Stichprobe überzufällig häufig ein Persönlichkeitsprofil aufweisen, das bisher durchgängig als prämorbide Struktur bei monopolar depressiven Patienten nachgewiesen werden konnte.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of optimization theory and applications 105 (2000), S. 371-389 
    ISSN: 1573-2878
    Keywords: zero-sum stochastic games ; limiting average rewards ; equilibria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We show the existence of almost stationary ∈-equilibria, for all ∈ 〉 0, in zero-sum stochastic games with finite state and action spaces. These are ∈-equilibria with the property that, if neither player deviates, then stationary strategies are played forever with probability almost 1. The proof is based on the construction of specific stationary strategy pairs, with corresponding rewards equal to the value, which can be supplemented with history-dependent δ-optimal strategies, with small δ 〉 0, in order to obtain almost stationary ∈-equilibria.
    Type of Medium: Electronic Resource
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