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  • 1
    Electronic Resource
    Electronic Resource
    Foreign body ingestion: Management of 167 cases (1991)
    Springer
    World journal of surgery 15 (1991), S. 783-788 
    Details
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les résultats de notre expérience du traitement de 167 cas de corps étranger ingérés entre 1980 et 1986 ont été revus. Deux patients ont refusé le traitement proposé (1.1%). Une attitude conservatrice a pu Être adoptée chez 14 patients (8.4%). Une endoscopie à visée thérapeutique a été pratiquée chez 117 patients: elle a été efficace dans 85.5% des cas, avec un taux de complications de 1.7%, sans mortalité. La chirurgie a été nécessaire chez 51 patients (30.0%), dont 14 échecs de l'endoscopie. Il y a eu un taux de 17.6% de complications et un complications de 1.7%, sans mortalité. La chirurgie a été nécessaire chez 51 patients (30.0%), dont 14 échecs de reposer sur l'utilisation judicieuse de l'endoscopie et/ou de la chirurgie.
    Abstract: Resumen En una revisión del manejo de 167 casos de ingestion de cuerpos extraños en el período 1980–86 se observaron los siguientes resultados. Dos pacientes rehusaron tratamiento (1.1%); tratamiento conservador fue intentado en 14 (8.4%); se realizó endoscopia en 117, con una tasa global de éxito de 85.5%, una tasa de complicaciones de 1.7% y ninguna muerte. El tratamiento quirÚrgico fue necesario en 51 pacientes (30.0%); 14 habían tenido endoscopia no exitosa, con una tasa de complicaciones de 17.6% y 1 muerte (1.9%) debida a fistula aortoesofágica. Se plantean conclusiones relativas al manejo de cuerpos extranos combinando la técnica de endoscopia de fibra óptica con cirugía.
    Notes: Abstract We reviewed the management of 167 patients with foreign body ingestion from 1980 to 1986. Two patients (1.1%) refused treatment. Nonoperative management was attempted in 14 (8.4%) patients. Endoscopy was performed on 117 patients with an overall success rate of 85.5% and a complication rate of 1.7%. Surgical treatment was required in 51 (30.0%) patients, 14 of whom had previous unsuccessful endoscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01665320
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  • 2
    Electronic Resource
    Electronic Resource
    Two questions on the geometry of gauge fields (1994)
    Springer
    Foundations of physics 24 (1994), S. 783-800 
    Details
    ISSN: 1572-9516
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We first show that a theorem by Cartan that generalizes the Frobenius integrability theorem allows us (given certain conditions) to obtain noncurvature solutions for the differential Bianchi conditions and for higher-degree similar relations. We then prove that there is no algorithmic procedure to determine, for a reasonable restricted algebra of functions on spacetime, whether a given connection form satisfies the preceding conditions. A parallel result gives a version of Gödel's first incompleteness theorem within an (axiomatized) theory of gauge fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02054673
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  • 3
    Electronic Resource
    Electronic Resource
    Pseudosinkhole occurrences in Brasilia, Brazil (1994)
    Springer
    Environmental geology 23 (1994), S. 36-40 
    Details
    ISSN: 1432-0495
    Keywords: Sinkholes ; Laterite ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Brasilia, the capital city of Brazil, is located in the central region of the country. Climate in the area is semitropical with an annual rainfall of 1500 mm. The geological environment in the area consists of low-grade metamorphic rocks. Slates of varying colors, metasiltstone, and quartzite beds are present. Over the Precambrian rocks is a lateritic layer varying in thickness from centimeters up to 30 m. Latosol dominates the existing plateaus, while laterite crusts and immature soils are dominant in the transition zones between plateaus and river valleys. Erosional problems related to the lateritic terrains were known prior to the settlement of the city in 1961. During 1986, erosion became a serious threat when several pseudosinkholes occurred in the urban area. Occurrence of pseudosinkholes resulted in condemnation of an area of 300,000 m2 and the demolition of several buildings. Preliminary studies indicated at the time that underground erosion and pseudosinkholes were generated by shortening of the percolation path of groundwater due to the progress, toward the residential area, of large gullies. This produced an increase in the hydraulic gradient, resulting in the removal of latosol particles. Occurrence of pseudosinkholes in other areas of the city has led the Institute of Geosciences to investigate the problem in more detail. Studies have been conducted looking for correlation between pseudosinkhole occurrence and geologic, geomorphic, geotechnical, and urban development features. Recent results show a much more complex process then previously thought. Field data suggests that termite activity and recharge of the water table by inadequate disposal of residential sewer systems are directly related to the problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00773137
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  • 4
    Electronic Resource
    Electronic Resource
    Trapezoid osteotomy for slipped capital femoral epiphysis (2000)
    Springer
    International orthopaedics 24 (2000), S. 83-87 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé  23 patients avec épiphysiolyse fémorale supérieure de l’adolescent ont été traités utilisant une ostéotomie modifiée avec résection trapézo sous-capitale. Tous les déplacement ont été de plus de 60 degrees. La moyenne de la période d’étude a été de 70 mois (54–93 mois). On a retrouvé un resultat excellent ou bon en 18 hanches, passable en 1, et médiocre en 4 hanches. La nécrose céphalique s’est developpée en 3 hancles et la chondrolyse en 2.
    Notes: Abstract  Twenty-three patients with chronic or acute to chronic slip of the capital femoral epiphysis were treated using a modified trapezoid osteotomy of the femoral neck. All slips were greater than 60°. After a follow-up period of 70 (54–93) months, the results were excellent or good in 18 hips, fair in 1, and poor in 4 hips. Avascular necrosis developed in 3 hips, and chondrolysis in 2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002640000107
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  • 5
    Electronic Resource
    Electronic Resource
    External fixation of intertrochanteric fractures of the femur (1995)
    Springer
    International orthopaedics 19 (1995), S. 217-219 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Dans la période de Juillet 1992 à Avril 1994, 40 patients présentant des fractures transtrochantériennes ont eu un traitement chirurgical par fixateur externe. Ces cas ont été sélectionnés à cause du grand risque chirurgical qu'ils présentaient. L'évaluation radiographique a été faite en période post-opératoire immédiate, puis à 30 et à 90 jours. Les résultats ont été analysés en fonction de l'évolution clinique et de la consolidation osseuse. Ce travail montre que le fixateur externe utilisé dans les fractures inter-trochantériennes est une bonne méthode pour les patients présentant un risque chirurgical élevé.
    Notes: Summary Forty patients with intertrochanteric fractures of the femur were treated by external fixation between July 1992 and April 1994. They were selected because of their high surgical risk, and evaluated by radiographs immediately after operation, and at 30 and 90 days. The results indicate that external fixation is a useful method of treatment for this type of patient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00185225
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  • 6
    Electronic Resource
    Electronic Resource
    Fractures of the humerus in arm wrestling (1995)
    Springer
    International orthopaedics 19 (1995), S. 390-391 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs rapportent deux cas de fracture spiroïde de l'humérus pendant un »bras de fer« sans complication neurologique. La fréquence de la fracture, la cause et le mécanisme sont discutés.
    Notes: Summary Two cases of spiral fracture of the humerus, which occurred during arm wrestling, are reported. The possible mechanism is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178356
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  • 7
    Electronic Resource
    Electronic Resource
    A random-walk approach to interference (1994)
    Springer
    International journal of theoretical physics 33 (1994), S. 179-189 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper we sketch a probabilistic particle approach requiring no separate concept of wave to obtain interference. We describe in some detail how things work from a physical standpoint and show with a number of figures how the standard wave concepts are developed from purely particle random walks. For the wave concepts we have in each case a matching probability concept. The preliminary theory developed here is qualitative and stresses the physical character of the assumptions. In particular, we show that the periodic behavior of light is derived from the source and not from individual photons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00671623
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  • 8
    Electronic Resource
    Electronic Resource
    A Suppes predicate for general relativity and set-theoretically generic spacetimes (1990)
    Springer
    International journal of theoretical physics 29 (1990), S. 935-961 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We summarize ideas from Zermelo-Fraenkel set theory up to an axiomatic treatment for general relativity based on a Suppes predicate. We then examine the meaning of set-theoretic genericity for manifolds that underlie the Einstein equations. A physical interpretation is finally offered for those set-theoretically generic manifolds in gravitational theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00673682
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  • 9
    Electronic Resource
    Electronic Resource
    A particle theory of the Casimir effect (1996)
    Springer
    Foundations of physics 9 (1996), S. 213-223 
    Details
    ISSN: 1572-9524
    Keywords: photon ; trajectories ; QED ; Casimir effect ; quantum vacuum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In previous works, Suppes and de Barros used a pure particle model to derive interference effects, where individual photons have well-defined trajectories, and hence no wave properties. In the present paper we extend that description to account for the Casimir effect. We consider that the linear momentum ∑ 1/2hk of the vacuum state in quantum electrodynamics corresponds to the linear momentum of virtual photons. The Casimir effect, in the cases of two parallel plates and the solid ball, is explained in terms of the pressure caused by the photons. Contrary to quantum electrodynamics, we assume a finite number of virtual photons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02186404
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  • 10
    Electronic Resource
    Electronic Resource
    Violation of bell's inequalities with a local theory of photons (1996)
    Springer
    Foundations of physics 9 (1996), S. 551-560 
    Details
    ISSN: 1572-9524
    Keywords: Bell's-inequalities ; EPR ; photons ; hidden-variables ; stochastic-models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We use a local theory of photons purely as particles to model the single-photon experiment proposed by Tan, Walls, and Collett. Like Tanet al. we are able to derive a violation of Bell's inequalities, but our local probabilistic theory does not use any specific quantum mechanical assumptions or calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02190030
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