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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 433-448 
    ISSN: 0392-6737
    Keywords: General theories and computational techniques (including many-body perturbation theory, density-functional theory, atomic sphere approximation methods, Fourier decompositon methods, etc.) ; Developments in mathematical and computational techniques ; Numerical approximation and analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The recently introduced Connected-Moments Expansion (CMX) is compared to a variational Lanczos scheme for estimating ground-state energies of many-body systems. A systematic approach is given for three quantum-mechanical systems: harmonic oscillator, anharmonic oscillator and the Kondo model. A second-order analysis is given in terms of particular ratios of moments of the Hamiltonian.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 17 (1993), S. 188-192 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Dans une étude prospective on a effectué chez 9 malades atteints d'arthrite rhumatoïde une double photo-absorptiométrie avant une synovectomie du genou, ainsi que 3, 6, 12 et 24 mois après l'opération. Cet examen a permis d'évaluer quantitativement le degré d'ostéoporose juxta-articulaire. La densité osseuse a ensuite été comparée à un groupe de contrôle sans lésions du genou. Les mesures faites après synovectomie montrent une augmentation de la minéralisation osseuse à partir du sixième mois post-opératoire. Ceci prouve que la densitométrie de l'os constitue un indicateur objectif de l'évolution de l'ostéoporose juxta-articulaire dans les rhumatismes inflammatoires.
    Notes: Summary In a prospective study 9 patients, who were going to have a synovectomy for rheumatoid arthritis of the knee, underwent dual photon absorptiometry before, and at intervals after, operation. This determined the degree of juxta-articular osteoporosis quantitatively. The density was compared to a control group with normal knees. The follow up measurements showed an improvement in the juxta-articular bone mineral content after the 6th month. This demonstrates that bone densitometry is an objective indicator of the development of juxta-articular osteoporosis in inflammatory joint disease.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 375 (1990), S. 289-294 
    ISSN: 1435-2451
    Keywords: Colonic necrosis ; Necrotizing pancreatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Kolonnekrose ist eine seltene, jedoch häufig letal verlaufende Komplikation der nekrotisierenden Pankreatitis. Von 159 Patienten mit nekrotisierender Pankreatitis, welche wir im Zeitraum 1986–1988 behandelten, kam es bei 10 Patienten entsprechend 6,3% zu einer Kolonläsion im Krankheitsverlauf. Alle 10 Patienten wurden operiert. Wir sahen hierbei hinsichtlich des zeitlichen Auftretens und der Ausdehnung der Kolonläsionen 2 unterschiedliche Erscheinungsformen. Einmal frühzeitig, d. h. innerhalb der 1. Krankheitswoche aufgetretene, langstreckige, im wesentlichen ischämische Kolonnekrosen, zum anderen sich später manifestierende, lokalisierte, ausschließlich die linke Kolonflexur betreffende Nekrosen, welche am ehesten als Komplikation bei fortbestehenden infizierten Pankreasrestnekrosen anzusehen waren. Hinsichtlich der Kolonläsion erfolgte bei 9 Patienten die Kolondiskontinuitätsresektion und einmal die lokale Exzision mit Übernähung bei zusätzlich vorgeschalteter Kolostomie. Trotz beherrschbarer Kolonkomplikation überlebten von diesen 10 Patienten nur 1, wobei sich bei allen diesen Patienten mit ausgedehnten Pankreasnekrosen von Anfang an schwere Verlaufsformen abzeichneten und sie sich zum Zeitpunkt des Auftretens der Kolonläsion bereits in einem fortgeschrittenen toxischen und septischen Zustand mit eingetretenem Mehrorganversagen befanden.
    Notes: Summary Necrosis of the colon is a rare but often fatal complication of necrotizing pancreatitis. Among 159 patients with necrotizing pancreatitis who were treated between 1 January 1986 and 31 December 1988, a colonic lesion developed in 10 patients (6.3%). All 10 patients underwent surgery. With regard to the time of occurrence and the extent of the lesion two types could be distinguished: first, extensive, probably ischemic colonic necrosis developed early in the course of the disease, i.e., within the 1st week; second, localized lesions mainly in the region of the left colonic flexure occurred much later and were considered to be a complication related to persistent infection in the remaining pancreatic necroses. The colonic lesions were treated by resection and fecal diversion in 9 patients and by local excision with direct closure and additional diverting colostomy in one patient. Even though the colonic complications could be controlled, only 1 of the 10 patients survived. This can be explained by the fact that all these patients had a severe form of the disease with extensive pancreatic necroses and were in a septic-toxic state with multiple organ failure at the time the colonic lesion occurred.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured distributions in transverse momentum and rapidity of protons from interactions of 14.6 GeV/nucleon28Si projectiles with targets of Al and Pb. The transverse momentum spectra exhibit a thermal shape with a rapidity dependent temperature parameter. For very central or violent collisions the proton rapidity distributions exhibit the large rapidity shifts and (for Si+Al) a peak at midrapidity as required for full stopping.
    Type of Medium: Electronic Resource
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