Duringmost of the nineteenth century the existenceof an all-encompassing ether as a substitute for a true void was taken for granted. According to the successful electromagnetic ether theory based upon Maxwellian electrodynamics, the ether was endowed with energy and hence very different from nothingness. Oliver Lodge thought that its energy density was enormous, about 1033 erg cm−3. The active...

Mercedes Bleda-Maza de Lizana, Hannelore Brandt, Ille C. Gebeshuber, Michael MacPherson, Tetsuya Matsuguchi and Szabolcs Számadó 1 Manchester School of Management & Tyndall Centre for Climate Change Research, Manchester, UK 2 Department of Mathematics, University of Vienna, Austria 3 Institut für Allgemeine Physik, Vienna University of Technology, Vienna, Austria & Austrian Center of Competence...

In 2004, Sormani and Wei introduced the covering spectrum: a geometric invariant that isolates part of the length spectrum of a Riemannian manifold. In their paper they observed that certain Sunada isospectral manifolds share the same covering spectrum, thus raising the question of whether the covering spectrum is a spectral invariant. In the present paper we describe a group theoretic conditio...

In this paper we want to analyze the pictures publishing in the Spanish and international newspapers before the Madrid terrorist attack, March, 11. With this research we get some ideas about freedom speech limits: the respect of the privacy and, in special, the respect of the pain. At the same time, we ́ll remark the importance of the photography in the press and their communication power. For t...

.................................................................................................................... 7 Resumo...................................................................................................................... 9 Résumé .................................................................................................................... 11

We introduce the concepts of a multisymplectic structure and a polysymplectic structure on a general fiber bundle over a general base manifold, define the concept of the symbol of a multisymplectic form, which is a polysymplectic form representing its leading order contribution, and prove Darboux theorems for the existence of canonical local coordinates. Universidade de São Paulo RT-MAP-0702 De...

The debate as to whether Jewishness is a biological trait inherent from an "authentic" "Jewish type" (jüdische Typus) ancestor or a system of beliefs has been raging for over two centuries. While the accumulated biological and anthropological evidence support the latter argument, recent genetic findings, bolstered by the direct-to-consumer genetic industry, purport to identify Jews or quantify ...

This article considers that the National Plan of Workers’ Qualification – Planfor established too audacious general objectives: democratization of access to professional qualification; the search of a sustainable development model; and new State’s performance. It also considers that the Plan succeeded in the first and third objectives, while its limits have had great impact on the second one.