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  • Articles  (13)
  • OceanRep
  • Schizophrenia  (7)
  • Gröbner bases  (3)
  • Treatment  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Advances in computational mathematics 12 (2000), S. 335-362 
    ISSN: 1572-9044
    Keywords: ideal bases ; Gröbner bases ; multivariate polynomials ; interpolation ; systems of polynomial equations ; 65D05 ; 65H10 ; 13P10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The H-basis concept allows, similarly to the Gröbner basis concept, a reformulation of nonlinear problems in terms of linear algebra. We exhibit parallels of the two concepts, show properties of H-bases, discuss their construction and uniqueness questions, and prove that n polynomials in n variables are, under mild conditions, already H-bases. We apply H-bases to the solution of polynomial systems by the eigenmethod and to multivariate interpolation.
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  • 2
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Lebensqualität ; Metaanalyse ; Depressive ; Schizophrene ; Facettenanalyse ; Modulares System ; Key words Quality of life ; Metaanalysis ; Depression ; Schizophrenia ; Facet analysis ; Modular system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The construct Quality of Life (QoL) is investigated by metaanalysis of eight (inter)nationally validated questionnaires in a multicenter study. Data have been collected in a mentally healthy (n=479), a depressed (n=171) and a schizophrenic (n=139) sample. Conventional psychometric criteria and a facet analytical methodology have been applied. The resulting questionnaire „Modular System for Quality of Life” (MSQoL) consists of a core module with 47 items (one „G-factor” and six subdimensions), which is sufficiently valid for all three samples. Additionally, there are four specific modules (demography, family, partnership, profession). No specific modules can be identified for the psychopathological subgroups. The validated radex structure for subjective QoL offers the opportunity for a cumulative research design and for adaptations to the actual setting.
    Notes: Zusammenfassung In einer von der Arbeitsgruppe „Lebensqualität (LQ)” der „Arbeitsgemeinschaft für Methodik und Dokumentation in der Psychiatrie” (AMDP) unterstützten multizentrischen Studie wird das Konstrukt Lebensqualität (LQ) anhand von acht (inter)national validierten Erhebungsinstrumenten sowie einer gesunden (n=479), einer depressiven (n=171) und einer schizophrenen (n=139) Stichprobe metaanalytisch untersucht. Neben herkömmlichen psychometrischen Kriterien liegt der methodische Schwerpunkt dabei auf einem facettenanalytischen Vorgehen. Der resultierende Fragebogen „Modulares System zur Lebensqualität” (MSLQ) besteht aus einem für alle 3 Stichproben hinreichend validen Kernmodul mit 47 Items (ein „G-Faktor” und 6 Subdimensionen) sowie 4 spezifischen Modulen (Demographie, Familie, Partnerschaft, Beruf). Für die psychopathologischen Subgruppen lassen sich keine spezifischen Module etablieren. Die validierte Struktur der subjektiv eingeschätzten Lebensqualität (in Form einer facettenanalytischen Radexkonstellation) bietet die Möglichkeit zu einer kumulativ angelegten Forschung und einer untersuchungsspezifischen Anpassung des MSLQ.
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  • 3
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Psychopharmakologie ; Suizid ; Schizophrenie ; Risikofaktoren ; Psychopathologie ; Keywords Psychopharmacology ; Suicide ; Schizophrenia ; Risk facotrs ; Psychopathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract For all 5.352 patients treated for schizophrenia at the Psychiatric Hospital of the University of Munich in 1981 and 1992, detailed routine and data processing-assisted documentations were made of the psychopharmacological therapies. Nineteen of the patients committed suicide while undergoing inpatient treatment; the control group consisted of all other patients (n=5.333). More than 77 sociodemographic and anamnestic variables as well as 195 items from the admission summaries were taken into account while comparing the groups. Furthermore, the pharmacological data were classified according to drug groups and comparison was based on the mean frequency of prescription of each group. We analyzed the mean number of prescriptions for neuroleptics, tranquilizers, and antidepressants, which were further differentiated into sedating and nonsedating types. For frequently administered drugs, mean daily doses were also compared. Bivariate analysis of the data suggests that the suicide cases presented depressive signs, symptoms, and tendencies already present on admission more frequently than with controls; the same applies to previously attempted suicides. Discriminating analysis showed that the variables “feeling of loss of feelings,“ thought insertion,”“visible depression,”“free-floating anxiety,”“suicidal tendencies,” and “previously attempted suicide” have the greatest predictive value with respect to suicide, in descending order. No differences in psychopharmacological treatment between suicides and controls were found, apart from a significantly higher percentage of antidepressive treatments and a higher mean number of antidepressant prescriptions for the suicides.
    Notes: Zusammenfassung Bei allen 5.352 im Zeitraum 1981–1992 in der Psychiatrischen Klinik der Universität München stationär aufgenommenen schizophrenen Patienten wurde systematisch sowohl eine Routinedokumentation mit dem AMDP-System als auch eine computergestützte Dokumentation der pharmakologischen Behandlung durchgeführt. 19 dieser Patienten suizidierten sich während des stationären Aufenthaltes, wobei die Kontrollgruppe aus allen übrigen Patienten gebildet wurde (n=5.333). In den Gruppenvergleich gingen alle soziodemographischen und krankheitsanamnestischen Variablen sowie alle Items des AMDP-Aufnahmebefundes ein. Ferner wurden die pharmakologischen Daten nach Medikamentengruppen zusammengefasst und hinsichtlich der Verordnungshäufigkeiten der jeweiligen Pharmakagruppen verglichen. Die bivariate Auswertung zeigte neben häufigeren Suizidversuchen in der Vorgeschichte ein bei den säteren Suizidenten bereits bei Aufnahme häufiger vorliegendes depressiv-suizidales Syndrom, wobei diskriminanzanalytisch in absteigender Reihenfolge die Variablen “Gefühl der Gefühllosigkeit”, “Gedankeneingebung”, “beobachtete Depression”, “frei flottierende Angst”, “Suizidalität” und “Suizidversuch in der Vorgeschichte” die größte prädiktive Kraft in Richtung Suizid entfalteten. Mit Ausnahme einer signifikanten Erhöhung sowohl des prozentualen Anteils der antidepressiv behandelten Patienten als auch der mittleren Anzahl der Antidepressivaverordnungen in der Suizidgruppe fanden sich keine Anhaltspunkte für eine zwischen den beiden Gruppen wesentlich differierende psychopharmakologische Behandlung.
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  • 4
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Transkranielle Magnetstimulation ; Elektrokrampftherapie ; Depression ; Therapie ; Key words Transcranial magnetic stimulation ; Electro convulsive therapy ; Depression ; Treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Transcranial magnetic stimulation (TMS) has been used since a decade to investigate the central motor system in the neurological routine diagnostic. From this experience TMS has prooved to be a save and well tolerated procedure. In the past few years several studies investigated TMS to electrically stimulate deeper brain regions to find antidepressive effects in analogy to electro convulsive therapy (ECT). This could be of great advantage as TMS is well tolerated and does not require general anesthesia. There have been some case reports and also some controlled clinical studies on TMS as a therapeutic tool. The results of these studies have been promising. Many questions regarding technical and clinical aspects remain to be answered. In the future however TMS could be a valuable addition in the treatment of depression.
    Notes: Zusammenfassung Die transkranielle Magnetstimulation (TMS) ist ein Verfahren, das seit nunmehr einer Dekade in der neurologischen Diagnostik zur Untersuchung der motorischen Bahnsysteme routinemäßig eingesetzt wird. Aus dieser Zeit ist die TMS bezüglich der Sicherheit in der Anwendung am Menschen gut untersucht und hat sich als sicher und nebenwirkungsfrei erwiesen. Seit wenigen Jahren wird die Möglichkeit untersucht, mittels der TMS nichtinvasiv tiefere Hirnregionen elektrisch zu stimulieren und so, in Analogie zur Elektrokrampftherapie, eine antidepressive Wirkung zu erzielen. Dies hätte große Vorteile, da dieses Verfahren schonend und ohne Narkose angewendet werden kann. Mehrere Einzelfallanwendungen, aber auch schon mehrere klinisch kontrollierte Studien lassen z. Z. die begründete Hoffnung zu, daß dieses Verfahren zu einer Erweiterung des Spektrums antidepressiver Behandlungsverfahren führen könnte.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Der Anaesthesist 48 (1999), S. 507-518 
    ISSN: 1432-055X
    Keywords: Schlüsselwörter Postoperatives Delir ; Postoperative psychiatrische Störungen ; Therapie ; Prophylaxe ; Key words Postoperative delirium ; Postoperative psychiatric disturbance ; Treatment ; Prophylaxis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract After surgical operations delirium can occur as a serious and possible lethal complication in about 5–15% of patients. Additionally, risk factors such as old age, polymedication, organic and psychiatric diseases raise the incidence. After open-heart- and orthopedic surgery more than half of the patients are affected. Delirium has negative effects on postoperative mobilization and reconvalescence and prolongs treatment on the ward. It is discussed in the literature that delirium may induce dementia in older patients. The correction of metabolic- and electrolyte imbalances, as well as the therapy of neurologic and psychiatric diseases, belongs to prophylactic treatment. Environmental conditions which facilitate reorientation of the patient after operation have beneficial effects. Some success has been achieved by using the nootropic substance piracetam as a prophylactic. In acute treatment, the butyrophenon-neuroleptic haloperidol is the drug of choice. In delirium caused by intoxication with anticholinergic agents, physostigmin is indicated. Benzodiazepines, clonidine and clomethiazole are used in particular for the treatment of withdrawal delirium.
    Notes: Zusammenfassung Nach operativen Eingriffen kommt es bei 5 bis 15% der Patienten zu einem Delir, welches eine ernste und potentiell tödliche Komplikation darstellt. Bei zusätzlich bestehenden Risikofaktoren wie hohem Alter, medikamentöser Mehrfachtherapie, somatischen und psychiatrischen Störungen findet sich eine noch wesentlich höhere Inzidenz. Bei Operationen am offenen Herzen und orthopädischen Eingriffen sind über die Hälfte der Patienten betroffen. Das Delir beeinträchtigt die postoperative Mobilisierung und Rekonvaleszenz der Patienten und führt zur Verlängerung des stationären Aufenthalts. Die Gefahr einer dementiellen Entwicklung als Spätfolge des Delir bei älteren Patienten wird in der Literatur diskutiert. Zu den Maßnahmen der Prophylaxe zählen die Behandlung von metabolischen Entgleisungen, Ausgleich von Elektrolytstörungen und Therapie von neurologischen und psychiatrischen Erkrankungen. Verhaltensmaßnahmen, die die Orientierung des Patienten nach der Operation erleichtern, haben eine günstige Wirkung. Erfolge wurden durch die prophylaktische Verabreichung des Nootropikums Piracetam berichtet. In der Akutbehandlung ist das Butyrophenon-Neuroleptikum Haloperidol Mittel der Wahl zur Sedierung. Bei Delirien auf der Grundlage einer Intoxikation mit anticholinerg wirkenden Pharmaka ist Physostigmin indiziert. Benzodiazepine, Clonidin und Clomethiazol kommen v.a. bei der Behandlung des Entzugsdelir zum Einsatz.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Applicable algebra in engineering, communication and computing 4 (1993), S. 103-145 
    ISSN: 1432-0622
    Keywords: Gröbner bases ; Polynomial ideals ; Dual bases ; Interpolation ; 0-dimensional schemes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics , Technology
    Notes: Abstract In this paper we study 0-dimensional polynomial ideals defined by a dual basis, i.e. as the set of polynomials which are in the kernel of a set of linear morphisms from the polynomial ring to the base field. For such ideals, we give polynomial complexity algorithms to compute a Gröbner basis, generalizing the Buchberger-Möller algorithm for computing a basis of an ideal vanishing at a set of points and the FGLM basis conversion algorithm. As an application to Algebraic Geometry, we show how to compute in polynomial time a minimal basis of an ideal of projective points.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applicable algebra in engineering, communication and computing 4 (1993), S. 217-230 
    ISSN: 1432-0622
    Keywords: Algebraic variety decomposition ; Gröbner bases ; Systems of nonlinear equations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics , Technology
    Notes: Abstract This paper deals with systems ofm polynomial equations inn unknown, which have only finitely many solutions. A method is presented which decomposes the solution set into finitely many subsets, each of them given by a system of type $$f_1 \left( {x_1 } \right) = 0,f_2 \left( {x_1 ,x_2 } \right) = 0, \ldots ,f_n \left( {x_1 , \ldots ,x_n } \right) = 0$$ . The main tools for the decomposition are from ideal theory and use symbolical manipulations. For the ideal generated by the polynomials which describe the solution set, a lexicographical Gröbner basis is required. A particular element of this basis allows the decomposition of the solution set. By a recursive application of these decomposition techniques the triangular subsystems are finally obtained. The algorithm gives even for non-finite solution sets often also usable decompositions.
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  • 8
    ISSN: 1432-2072
    Keywords: Schizophrenia ; negative symptoms ; clinical trials ; psychiatric status rating scales ; neuroleptics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract There is little agreement about the methodology of clinical trials of antipsychotic drugs in patients with negative symptoms. A literature review revealed wide variation in experimental design, rating scales and study duration. This reflects differing views as to the definition and response to treatment of negative symptoms. Some degree of standardization would improve comparability of studies and aid the development of new compounds. Patients included in such studies should have displayed negative symptoms for at least 6 months. Depressive symptoms, positive schizophrenic symptoms and extrapyramidal signs may all influence or be confused with negative symptoms and may respond to treatment; they should be at a low level at baseline and should be measured during the study period. Studies should last at least 8 weeks. Several scales are available for measuring negative symptoms and are reviewed; a global impression score should be used additionally.
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  • 9
    ISSN: 1432-2072
    Keywords: Key words Amisulpride ; Atypical antipsychotic ; Schizophrenia ; Haloperidol ; Productive symptoms ; Secondary negative symptoms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Amisulpride is a substituted benzamide with high selectivity for dopaminergic D2 and D3 receptors. This study compared 800 mg/day amisulpride and 20 mg/day haloperidol in patients with acute exacerbations of schizophrenia. This multicenter, double-blind trial involved 191 patients allocated, after a 1 to 7-day wash-out period, to amisulpride (n = 95) or haloperidol (n = 96) for 6 weeks. Improvement of mean BPRS total score was 48% for amisulpride and 38% for haloperidol (NS), whereas improvement in the Negative PANSS subscale was greater in the amisulpride group (37%) compared to haloperidol (24%) (P = 0.038). CGI scores showed a higher number of responders in the amisulpride (62%) than in the haloperidol group (44%) (P = 0.014). More extrapyramidal symptoms measured with the Simpson-Angus scale were provoked in the haloperidol group (P = 0.0009). Amisulpride is at least as effective as haloperidol in the treatment of acute exacerbations of schizophrenia, and is more effective in the treatment of negative symptoms whilst causing less parkinsonism.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 144 (1985), S. 370-373 
    ISSN: 1432-1076
    Keywords: Chronopharmacology ; Congenital adrenal hyperplasia ; Hydrocortisone ; 9α-Fluorhydrocortisone ; Treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The conventional treatment of CAH with hydrocortisone (16–19 mg/m2 per day) and 9α-F-cortisol (just enough to normalise renin concentrations, started at 07:00 h) was inffective in suppressing the early morning rise of 17-OH-progesterone and in turn androgens in about 20% of our patients. The present work explored the effect of a modified dosage regimen of the drug in five patients. The schedule was: 03:00 h F 33%+9α-F-F 33%; 07:00 h F 30%; 12:00 h F 22%+9α-F-F 33%; 17:30 h F 15%+9α-F-F 33%. Monitored levels of circulating 17-OH-progesterone, testosterone, and individual urinary 17-ketosteroids showed significant improvement, which was not achieved by giving higher or later evening doses. Menarche was induced in two girls (bone age 15 years). The modified dosage schedule offers on the one hand the possibility of better management of CAH, and on the other, cuts down the risk of enhanced Cushing-like effects, which in animal models have been related frequently to dosage schedules not corresponding to the circadian rhythm. The difficulty of administering the drugs at 03:00 h should be overcome by the development of a late-releasing preparation.
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