783 resultados para Euquação de Ginzburg-Landau


Relevância:

10.00% 10.00%

Publicador:

Resumo:

PURPOSE: The characteristic findings in accidental head injury consist of linear skull fracture, epidural haematoma, localized subdural haematoma, or cortical contusion because of a linear or translational impact force. Retinal haemorrhages have been found, although uncommon, in accidental head trauma. METHODS: We performed a retrospective study of 24 consecutive cases of children with severe head injuries caused by falls. Inclusion criteria were skull fractures and/or intracranial haemorrhages documented by computerized tomography. All patients underwent a careful ophthalmic examination including dilated indirect fundoscopy within the first 48 h following admission. RESULTS: No retinal haemorrhages could be found in patients whose accidents were plausible and physical and imaging findings were compatible with reported histories. Excessive bilateral retinal haemorrhages were found in only three children with the typical signs of shaken baby syndrome. In eight children, trauma had led to orbital roof fractures. CONCLUSIONS: Retinal haemorrhages were not found in any of the patients with accidental trauma despite the severity of their head injuries. Hence, we add more evidence that there are strong differences between the ocular involvement in accidental translational trauma and those in victims of non-accidental trauma. Fall-related injuries carry a very low risk of retinal haemorrhages.

Relevância:

10.00% 10.00%

Publicador:

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Das Verhältnis zwischen Theorie und Praxis ist nach wie vor ungeklärt. Dennoch muss sich die Pädagogik um die Klärung des Theorie-Praxisbezugs bemühen. Die vielfach diskutierten Positionen, Theorie wirke direkt auf Praxis oder praktisches Handeln müsse theoriegeleitet erfolgen müssen kritisch hinterfragt werden. Mit der im Titel gewählten Metapher des Balancing soll zum Ausdruck gebracht werden, dass der Einflussgrad theoriegeleiteten Argumentierens auf reflektiertes praktisches Handeln im Hinblick auf personen- und situationsadäquates Handeln in der Praxis variiert. Der vorliegende Band versammelt Beiträge, die unterschiedliche Positionen des Theorie-Praxisbezugs vorstellen und diskutieren. Die Beiträge des vorliegenden Bandes thematisieren vier Felder pädagogischen Handelns, nämlich „Unterricht“ (Rolf Dubs, Philippe Patry, Josef Thonhauser, Alfred Weinberger, Sieglinde Weyringer), „Schul- und Unterrichtsentwicklung“ (Eric Patry, Franz Riffert und Andreas Paschon, S.V. Subramanian, Herbert Schwetz), „Studium und Lehrerbildung“ (Hermann Astleitner, Ferdinand Eder und Franz Hofmann, Tina Hascher, Christiane Spiel et al.) und „Intervention und Beratung“ (Angela Gastager, Meinrad Perrez, Kestutis Pukelis). In jedem Handlungsfeld werden je spezifische Blickwinkel auf die Beziehungen zwischen Theorie und Praxis eröffnet.

Relevância:

10.00% 10.00%

Publicador:

Relevância:

10.00% 10.00%

Publicador:

Relevância:

10.00% 10.00%

Publicador:

Resumo:

We investigate numerically the excitation of nonlinear magnetic interactions in a ferrite material by an energetic pump pulse of terahertz (THz) radiation. The calculations are performed by solving the coupled Maxwell and Landau-Lifshitz-Gilbert differential equations. In a time-resolved THz pump/THz probe scheme, it is demonstrated that Faraday rotation of a delayed THz probe pulse can be used to map these interactions. Our study is motivated by the ability of soft x-ray free electron lasers to perform time-resolved imaging of the magnetization process at the submicrometer and subpicosecond length and time scales.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

von Soliman von Hönigsberg

Relevância:

10.00% 10.00%

Publicador:

Resumo:

von S. R. Landau