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  • 1
    Digitale Medien
    Digitale Medien
    Global Optimisation of Time Domain Electromagnetic Data Using Very Fast Simulated Annealing (1999)
    Springer
    Pure and applied geophysics 155 (1999), S. 149-168 
    Details
    ISSN: 1420-9136
    Schlagwort(e): Key words: Global optimisation, simulated annealing, transient EM, multi-profile and multi-time channels.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract —Efficacy of the global optimisation technique is demonstrated in the inversion of time domain electromagnetic data. Transient EM responses observed using a coincident loops system along several profiles and different time channels over a plate like conducting body are inverted, using very fast simulated annealing (VFSA) as an optimisation tool. Three time channels for each profile are considered in the inversion. Study reveals that only one run of global inversion considering a single multi-channel profile is not enough to resolve all the nine model parameters of a plate-like conducting body. However, the global inversion of a single multi-channel profile with several runs yields a mean model that is quite close to the true model. Considering many profiles and time channels together in the global inversion can yield reliable estimates of all the parameters. Computationally, this is not an efficient procedure. Analysis of the results shows, however, that two distant profiles are enough to yield all the model parameters reliably, even after one run of the global inversion. Both noise-free and noisy synthetic data are used in the inversion. Finally, field data are also inverted to study the performance of the global inversion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s000240050259
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  • 2
    Digitale Medien
    Digitale Medien
    A new variant of esophageal atresia with tracheoesophageal fistula and duodenal atresia: a diagnostic dilemma (1997)
    Springer
    Pediatric surgery international 12 (1997), S. 186-187 
    Details
    ISSN: 1437-9813
    Schlagwort(e): Key words Esophageal atresia ; Tracheoesophageal fistula ; Duodenal atresia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract  A new variant of esophageal atresia (EA) with tracheoesophageal fistula (TEF) associated with duodenal atresia is reported. The TEF was between the lower pouch and the trachea, with a cystic dilatation in the midportion. The tracheal end of the fistula was obstructed by a membranous septum at both ends of a cystic dilatation, leading to a diagnosis of pure EA (gasless abdomen). After the lower pouch was opened beyond the cystic dilatation, 100 ml nonbilious fluid was obtained. A laparotomy revealed a type III atresia of the first part of the duodenum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003830050099
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  • 3
    Digitale Medien
    Digitale Medien
    Abdominal tuberculosis in Indian children (1996)
    Springer
    Pediatric surgery international 11 (1996), S. 137-139 
    Details
    ISSN: 1437-9813
    Schlagwort(e): Childhood tuberculosis ; Abdominal tuberculosis in children ; Intestinal obstruction in children
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract During the period 1980–1991, 166 cases (121 surgically explored and 45 treated conservatively) of abdominal tuberculosis in children were encountered at the Children's Hospital, Institute of Medical Sciences, Banaras Hindu University. Various types of presentations and their management are discussed in the light of pertinent literature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00183746
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  • 4
    Digitale Medien
    Digitale Medien
    A new variant of esophageal atresia with tracheoesophageal fistula and duodenal atresia: a diagnostic dilemma (1997)
    Springer
    Pediatric surgery international 12 (1997), S. 186-187 
    Details
    ISSN: 1437-9813
    Schlagwort(e): Esophageal atresia ; Tracheoesophageal fistula ; Duodenal atresia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A new variant of esophageal atresia (EA) with tracheoesophageal fistula (TEF) associated with duodenal atresia is reported. The TEF was between the lower pouch and the trachea, with a cystic dilatation in the midportion. The tracheal end of the fistula was obstructed by a membranous septum at both ends of a cystic dilatation, leading to a diagnosis of pure EA (gasless abdomen). After the lower pouch was opened beyond the cystic dilatation, 100 ml nonbilious fluid was obtained. A laparotomy revealed a type III atresia of the first part of the duodenum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01349995
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  • 5
    Digitale Medien
    Digitale Medien
    A rare association of diphallus, colonic duplications, ileal atresia, and an anorectal malformation (1996)
    Springer
    Pediatric surgery international 11 (1996), S. 414-415 
    Details
    ISSN: 1437-9813
    Schlagwort(e): Diphallus ; Colonic duplication ; Anorectal malformation ; Ileal atresia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Diphallus is a rare congenital anomaly that is often associated with various other anomalies of the midline structures of the posterior portion of the body. We report a unique case of a 1-day-old male with complete diphallus, incomplete bilateral tubular duplications of the colon, ileal atresia, and an anorectal malformation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00497833
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  • 6
    Digitale Medien
    Digitale Medien
    Literature survey onin situ testing of concrete bridges (1983)
    Springer
    Materials and structures 16 (1983), S. 457-466 
    Details
    ISSN: 1359-5997
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Beschreibung / Inhaltsverzeichnis: Résumé L'essaiin situ des ponts exige un très grand savoir-faire et entraîne de lourdes dépenses. Les essais peuvent se donner des objectifs très différents: du simple contrôle de routine au diagnostic visant à localiser les causes de défaillance de la structure. Les essaisin situ peuvent être entrepris dans le but de compléter des études sur modèles, particulièrement lorsqu'on ne peut déterminer tous les paramètres des prototypes et obtenir un modèle expérimental parfaitement fiable. Un certain nombre d'étudesin situ de ponts se trouve décrit dans la littérature. Mais il ne semble pas qu'un effort systématique ait été entrepris pour résumer ces études. Cet article se propose d'examiner avec concision les principaux objectifs des essais retenus, l'instrumentation utilisée ainsi que les développments récents apparus dans l'instrumentation et dans les dispositifs caractéristiques d'essais en vue de mettre en évidence les apports positifs ou les insuffisances. Les objectifs des essais résumés ici vont de la comparaison entre données théoriques et résultats des mesures sous charge statique ou dynamique jusqu'aux essais destructifs des ponts. Cet article comprend les essais décrits et publiés ces 10 ou 12 dernières années sur les superstructures en béton, ainsi qu'un examen des critères d'évaluation et les recommandations pour les travaux publics.
    Notizen: Abstract In situ testing of bridges demands considerable expertise and entails heavy expenditure. The objectives of the tests may vary from being merely routine tests to diagnostic tests in order to locate the source of distress in the structure. An attempt is made in this paper to discuss briefly the objectives of the tests and the instrumentation usually employed. Salient features of the tests on concrete bridge superstructures reported in the last decade are summarised. Discussion on the evaluation criteria and recommendations for further work are also included.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02476345
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  • 7
    Digitale Medien
    Digitale Medien
    Einstein-rosen cylindrically symmetric space-time subject to class-one conditions (1984)
    Springer
    General relativity and gravitation 16 (1984), S. 349-354 
    Details
    ISSN: 1572-9532
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Necessary and sufficient conditions that a cylindrical, symmetric line element may be of class one have been derived in terms of metrical quantities. The conditions so obtained have been compared with those in the cases of spherical, planar, and hyperbolic symmetries.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00762192
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  • 8
    Digitale Medien
    Digitale Medien
    Insufficiency of Karmarkar's condition (1982)
    Springer
    General relativity and gravitation 14 (1982), S. 113-115 
    Details
    ISSN: 1572-9532
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract It is shown that Karmarkar's condition which has been claimed to be a necessary and sufficient condition for the spherically symmetric (s.s.) space-time to be of class 1 ceases to be sufficient in caseR 2323=0. An s.s. line element which satisfies Karmarkar's condition but ceases to be of class 1 is given. This line element describes a conformally flat perfect fluid distribution with zero density.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00756917
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  • 9
    Digitale Medien
    Digitale Medien
    On the thickness and spatial distribution of a fluoropolymer film deposited by solution dipping (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 211-222 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Poly-1H,1H-pentadecafuorooctyl methacrylate is a barrier compound used to prevent silicone oil from creeping to relay contacts. It is essentially a methyl methacrylate polymer with a fluorocarbon side chain substituted for one of the methyl hydrogens. It is applied by dipping the part into a solution, with Freon TF as the solvent and the fluorocarbon polymer as the solute. This work considers the spatial distribution of the resulting film of barrier compound when it is deposited in this manner. The specific variables considered are concentration and withdrawal velocity. The samples were withdrawn from the solution with velocity perpendicular to the surface, and we show that the macrosopic uniformity and thickness of the film is dependent on this velocity. There exists a critical velocity (dependent on concentration) above which the film is nonuniform and below which the film is macroscopically uniform. Below the critical velocity, the thickness varies with velocity with approximately a v2/3 dependence. The critical velocity is about 13 mm/sec for a concentration of 0.2%. For macroscopically uniform films, a microscopic nonunitormity exists with a coverage of about 1/4 for an average film thickness of 90 Å.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1980.070250207
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  • 10
    Digitale Medien
    Digitale Medien
    Examination of elemental nonuniformities in laser surface melted ternary copper alloys (1980)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 2 (1980), S. 179-182 
    Details
    ISSN: 0142-2421
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: The enhanced corrosion resistance of laser melted surfaces is often rationalized from the viewpoint of the homogenizing nature of the rapid quench from the liquid. We utilize Auger spectroscopy to examine elemental nonuniformities in laser surface melted ternary copper alloys (CDA-614 and CDA-725). In both systems we find depletion of the highest vapor pressure element from the central area of laser melt stripes, that region which reaches the highest temperature and remains molten for the greatest period of time. Although this near surface depletion is a small effect relative to the homogenization taking place over the orders of 10 and 102 µm, it may be a significant effect which should be taken into account when explaining changes in corrosion and oxidation behavior.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/sia.740020505
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