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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Der Chirurg 70 (1999), S. 54-58 
    ISSN: 1433-0385
    Keywords: Key words: Rectal prolapse ; Extracorporal resection ; Stapler ; Perineal repair. ; Schlüsselwörter: Rectumprolaps ; extracorporale Rectumresektion ; Klammernahtgerät ; perineale Verfahren.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. In 27 Fällen wurde die extracorporale Rectumresektion unter Verwendung eines zirkulären Klammernahtgeräts zur Behandlung eines kompletten Rectumprolaps angewandt. Das Durchschnittsalter der Patientinnen betrug 74 ± 15 Jahre, die mittlere Operationszeit 61 ± 17 min, die mittlere Dauer des stationären Aufenthalts 17 ± 8 Tage. 96 % der Patientinnen litten unter einer oder mehreren therapiepflichtigen Begleiterkrankungen. Die perioperative Letalität war 3,7 %, die postoperative Komplikationsrate 18 %. Eine postoperative Inkontinenz bestand bei 19 % der Patientinnen. Unsere Ergebnisse zeigen, daß die extracorporale Rectumresektion ein technisch einfaches und sicheres Verfahren in der Behandlung des kompletten Rectumprolaps darstellt. Angesichts mehrerer Vorteile gegenüber den transabdominellen Verfahren sollte die Indikation zur Anwendung von perinealen Verfahren nicht nur auf Hochrisikopatienten beschränkt beiben.
    Notes: Summary. Twenty-seven patients presenting with complete rectal prolapse were treated by extracorporal resection using a stapling device. The mean age of the female patients was 74 ± 15 years, the mean operation time 61 ± 17 min, the mean length of hospital stay 17 ± 8 days. 96 % of the patients suffered from at least one concurrent disease necessitating treatment. Perioperative mortality was 3.7 %, postoperative complications occurred in 18 % of our patients. After surgery 19 % of the patients were incontinent. Extracorporal resection using a stapling device proves to be a secure and technically easy-to-perform procedure in the treatment of complete rectal prolapse. Due to several advantages compared with transabdominal procedures, the indication for perineal repair of a complete rectal prolapse by extracorporal resection should not be confined to high-risk patients.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of statistical physics 72 (1993), S. 277-296 
    ISSN: 1572-9613
    Keywords: Asymmetric exclusion process ; steady state ; boundaryinduced phase transitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider an exclusion process with particles injected with rate α at the origin and removed with rate β at the right boundary of a one-dimensional chain of sites. The particles are allowed to hop onto unoccupied sites, to the right only. For the special case of α =β = 1 the model was solved previously by Derridaet al. Here we extend the solution to general α, β. The phase diagram obtained from our exact solution differs from the one predicted by the mean-field approximation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of statistical physics 71 (1993), S. 471-505 
    ISSN: 1572-9613
    Keywords: Asymmetric exclusion process ; Bethe ansatz ; steady state ; boundary-induced phase transitions ; correlation functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a model for a one-dimensional anisotropic exclusion process describing particles moving deterministically on a ring of lengthL with a single defect, across which they move with probability 0 ⩽p ⩽ 1. This model is equivalent to a two-dimensional, six-vertex model in an extreme anisotropic limit with a defect line interpolating between open and periodic boundary conditions. We solve this model with a Bethe ansatz generalized to this kind of boundary condition. We discuss in detail the steady state and derive exact expressions for the currentj, the density profilen(x), and the two-point density correlation function. In the thermodynamic limitL → ∞ the phase diagram shows three phases, a low-density phase, a coexistence phase, and a high-density phase related to the low-density phase by a particle-hole symmetry. In the low-density phase the density profile decays exponentially with the distance from the boundary to its bulk value on a length scale ξ. On the phase transition line ξ diverges and the currentj approaches its critical valuej c = p as a power law,j c − j ∞ ξ−1/2. In the coexistence phase the widthδ of the interface between the high-density region and the low-density region is proportional toL 1/2 if the densityρ f 1/2 andδ=0 independent ofL ifρ = 1/2. The (connected) two-point correlation function turns out to be of a scaling form with a space-dependent amplitude n(x1, x2) =A(x2)A Ke−r/ξ withr = x 2 −x 1 and a critical exponent κ = 0.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 341 (1992), S. 227-234 
    ISSN: 1434-601X
    Keywords: 75.25.+z ; 78.70.Dm ; 76.60.−k
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is demonstrated how circularly polarized x-rays can be used in nuclear and solid state physics. Detection of the radiation pattern of circularly polarized x-rays emitted in highly converted decays of oriented radio isotopes allows the determination of nuclear magnetic moments. Studying the absorption profiles of energy-tunable intense circularly polarized x-rays emitted from high-energy electron storage rings provides a powerful method to determine spin structure of electronic states, local magnetic moments and magnetic short range order in ferromagnetic materials.
    Type of Medium: Electronic Resource
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