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  • 1985-1989  (2)
  • 1920-1924
  • Perforation  (1)
  • optimization method  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 366 (1985), S. 704-704 
    ISSN: 1435-2451
    Keywords: Foreign body ; Rupture ; Perforation ; Esophagus ; Fremdkörper ; Ruptur ; Perforation ; Oesophagus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von 1968–1983 haben wir 114 Fremdkörper beobachtet. 94 konnten endoskopisch and 7 chirurgisch entfernt werden, 13 gingen per vias naturales ab. Von 1961–1983 wurden 11 Patienten mit einer Ruptur and 104 Patienten mit einer Perforation der Speiseröhre behandelt. Ursachen der Rupturen waren 9 Boerhaave-Syndrome und 2 Thoraxtraumen, die der Perforationen iatrogene Verletzungen, Tumore and direkte Traumen. Therapie der Wahl ist die chirurgische Versorgung (Naht oder Resektion). Die Letalität steigt mit dem Intervall zwischen Verletzung und Therapie. Bei Verdacht auf Läsion ist eine intensive radiologische and endoskopische Diagnostik sowie eine sofortige chirurgische Intervention anzustreben.
    Notes: Summary Between 1968 and 1983 we saw 114 foreign bodies in the esaphagus: 94 were extracted by endoscopy and 7 by surgical procedures; 13 passed per vias naturales. From 1961 to 1983 we treated 11 patients with ruptures and 104 patients with perforations of the esophagus. The causes of the ruptures were Boerhaave's syndrome (9) and thoracic trauma (2). The causes of the perforations were iatrogenic injuries, tumors, and direct traumas. A surgical procedure (suture or resection) is the treatment of choice. Mortality increases with the interval between the lesion and therapy. If an esophagal lesion is suspected, intensive radiological and endoscopic diagnosis and early surgical intervention are most important.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 10 (1989), S. 1103-1126 
    ISSN: 1572-9567
    Keywords: correlation equation ; equation of state ; least-squares principle ; optimization method ; search method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An optimization strategy is presented for optimizing the structure of empirical thermodynamic correlation equations. Based on a comprehensive functional expression for the physical dependence considered, which is called a “bank of terms,” the new procedure optimizes the structure and the length of the equation as well. The application of this method results in an equation which meets the quality wanted for representing the experimental data with the lowest number of fitted coefficients. The procedure can be used for the determination of the structure of any equation where the method of the linear least squares is applicable. A detailed description of the algorithm is given which includes values for the control parameters for different applications in the field of thermodynamics (vapor pressure equations, equations of state, etc.) and also for applications in other fields. The optimization steps are described using an equation which represents a relationship between variables in a general form. It is demonstrated how even the complex problem of the optimization of a fundamental equation for the Heimholtz energy can be written in terms of this general equation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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