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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Letters in mathematical physics 36 (1996), S. 189-196 
    ISSN: 1573-0530
    Keywords: 83E30 ; 81T30 ; 14C17 ; two-dimensional quantum gravity ; Riemann surfaces ; Painlevé I recursion relations ; Weil-Petersson two-forms ; Llouville path integral
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract We find a volume form on moduli space of double-punctured Riemann surfaces whose integral satisfies the Painlevé I recursion relations of the genus expansion of the specific heat of 2D gravity. This allows us to express the asymptotic expansion of the specific heat as an integral on an infinite-dimensional moduli space in the spirit of the Friedan-Shenker approach. We outline a conjectural derivation of such recursion relations using the Duistermaat-Heckman theorem.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Keywords: Key words Gastroesophageal reflux ; Neurologically impaired children ; Fundoplication ; Thal ; Nissen ; Gastrostomy ; Pyloroplasty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: It is difficult to give guidelines when approaching gastroesophageal disease in neurologically impaired children. Indication for surgery has been increasing over recent years, but there is no consensus on the surgical technique of choice. Nothing has been written specifically comparing the results of different procedures in these patients, so far. Study design: We retrospectively compare the short- and long-term results of two different types of fundoplication in a series of children operated on for documented gastroesophageal reflux disease at our institution. Results: One group (group A) of 27 patients, operated on between 1977 and 1993, underwent Nissen fundoplication, the other (group B), formed of 20 patients all of whom were operated on between 1993 and 1995, underwent Thal fundoplication. We compared the results in terms of positive outcome (recovery) and negative outcome (minor and major complication), computing the relative odds of group A versus group B in terms of risk of complication, and we compared the mean operative time and the length of hospital stay by means of a student's t-test analysis. Conclusions: Our results show that there is no statistical difference between the two procedures in terms of relative risk of complication and success rate. The duration of surgery and hospital stay were significantly shorter in group B. The Thal procedure can, therefore, be proposed as first choice in the management of these patients.
    Type of Medium: Electronic Resource
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