Towards the second decade of the nineteenth century Seebeck discovered that when two different conductors are joined together at both ends with the two junctions kept at different temperatures, an electromotive force arises. Seebeck's discovery, thanks to Melloni, converted the thermopile into the best measuring apparatus for the study of radiation. In this paper I discuss some technical properties of the thermopile used by Melloni in his early studies on radiant heat polarization; quantify in modern terms the behaviour of the (...) thermopile; and solve an enigma concerning its sensitivity. (shrink)

The second half of the nineteenth century in Italy bore witness to a number of scientific projects of great cultural importance that were unique on the European landscape. The correspondence between Govi and Boncompagni testifies to a scientific partnership throughout the twenty years’ life of the «Bullettino di Bibliografia e di Storia delle Scienze Matematiche e Fisiche». Both these scientists, as scholars of historical studies, bibliophiles and collectors, contributed to the spread of scientific literature and history. Nevertheless they did not (...) agree about the editorial style of the scientific works. (shrink)

Name der Zeitschrift: Klio Jahrgang: 98 Heft: 2 Seiten: 734-741.

In the context of astrophysical modeling at the solar system scale, we investigate the modalities implied by taking into account different levels of detail at which phenomena can be considered. In particular, by framing the analysis in terms of the how-possibly/how-actually distinction, we address the debated question as to whether the degree of plausibility is tightly linked to the degree of detail. On the grounds of concrete examples, we argue that, also in the astrophysical context examined, this is not necessarily (...) the case. (shrink)

Una revisión somera de la teorí­a contemporánea de la democracia ofrece el siguiente panorama: por un lado, una valoración positiva de la forma efectiva de la democracia, es decir, la democracia liberal y representativa porque provee estabilidad, se respetan las libertades y tienen altos niveles de legitimidad; y, por el otro, una crí­tica de la democracia por ineficiente, representativa y no participativa y por liberal en oposición a social. El problema, evidentemente, es el siguiente: la democracia, ¿podrí­a ser como deberí­a (...) ser o sólo puede ser como de hecho es? Evidentemente, no se puede ofrecer a esta pregunta una respuesta definitiva y, en su lugar, se revisan los argumentos de aquellos autores que defienden a la democracia liberal y representativa como la única forma de gobierno posible en el mundo moderno con la intención de determinar si tienen o no razón, es decir, si la democracia representativa y liberal es, en efecto, la única forma de democracia posible. Dos ejemplos clásicos de esta tesis se encuentran en las obras de Publius y Alexis de Tocqueville."œThe conditions of a possible democracy: The Federalist and Tocqueville"A superficial review of the contemporary theory of democracy ofers the following panorama. On the one hand, a positive appraisal of the efective form of democracy, that is, liberal and representative democracy because it provides stability, freedom is respected and there are high levels of justice. On the other, a criticism of democracy for being ineficient, representative and non-participatory, and for being liberal in opposition to social. Obviously the problem is the following: could democracy be what it should be or can it only be de facto? Obviously a definite answer cannot be given to this question and, instead, the arguments of those authors who defend liberal and representative democracy as the only possible form of government in the modern world are revised with the intention of determining whether they are right or not, that is, if representative and liberal government is, in efect, the only form of possible government. Two classic examples of this thesis are found in the works of Publius and Alexis de Tocqueville. (shrink)

La lección de Weber sobre la democracia es doble. Por un lado, la precisión acerca de qut actores y qut procesos son claves en su estudio -lidera, burocracia, partidos, búsqueda del poder, responsabilidad, &c.- y, por otro, la convicción acerca de los limites de lo posible en una democracia. P..

O objetivo deste artigo é discutir a ofensa sexual cometida por adolescentes/jovens adultos e as implicações sociais e jurídicas decorrentes. A adolescência é um período em que ocorrem mudanças significativas e a ofensa sexual é uma questão de saúde pública, complexa e multideterminada. Cometer ofensa sexual na faixa etária entre 16-21 anos traz a necessidade de compreensão contextualizada, pois envolve dimensões jurídicas diferenciadas. Trata-se de uma pesquisa documental com os prontuários de cinco adolescentes atendidos em uma instituição de saúde pública. (...) Os dados foram analisados a partir de categorias que conectam as vitimizações a aspectos sociofamiliares e implicações jurídicas. Os resultados apresentaram a polivitimização na história de vida e um ponto limite de virem a lidar com conjunto de regras de criminalização ou de proteção, de enfrentarem contextos jurídicos com legislações diferentes, quando ainda pertencem ao mesmo contexto familiar e à mesma comunidade. A responsabilização não pode ser a única resposta. (shrink)