Strings in horizons, dissipation and a possible interpretation of the Hagedorn temperature

We consider the entanglement of closed bosonic strings intersecting the event horizon of a Rindler spacetime, and, by using some simplified (rather semiclassical) arguments and some elements of the string field theory, we show the existence of a critical temperature beyond which closed strings cannot be in thermal equilibrium. The order of magnitude of this critical value coincides with the Hagedorn temperature, which suggests an interpretation consistent with the fact of having a partition function that is ill defined for temperatures higher than it. Possible implications of the present approach for the microscopical structure of stretched horizons are also pointed out.

Análise da estabilidade da região externa do sistema Plutão-Caronte após a descoberta dos novos satélites NIX e HIDRA: aplicação à sonda new horizons

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

O pensamento político em Eurípides / Euripides” political thought

No sempre reconhecido realismo euripidiano se inclui um envolvimento político. É notável o elogio a Atenas, seja a seu passado ilustre, seja a seu papel no mundo grego. Entretanto a guerra a que Atenas se atira e que faz enfraquecer a Grécia é condenada, pois a defesa de Atenas, concretizada na defesa de seu regime político, a democracia, não inclui a defesa do imperialismo ateniense. Assim, acima de Eurípides patriota se ergue o Eurípides humanista, preocupado com as responsabilidades do ser humano, não apenas do cidadão. Eurípides’ acknowledge realism includes a political involvement. The eulogy of Athens is remarkable both regarding her illustrious past and her role in the greek world. The war in which Athens is engaged and which weakens Greece, however, is condemned, for Athens’ defense, made real in the defense of her political regime, democracy, does not include the defense of Athenian imperialism. Thus, Euripides the patriot is excelled by Euripides the humanist, who is more concerned with the responsibilities of the human being, than with those of the citizen’s.

O ativismo judicial em investida ao Estado democrático

Pós-graduação em Direito - FCHS

Para que serve o passado: cronache di poveri amanti e a crônica da história

Vasco Pratolini recreates the 1920’s and the assertion of fascism resorting to the medieval and historiographical tradition, to the social outlook and the childhood memoir. Under the effects of the intellectual movement of the Italian Resistance, within the democratic context of the parliamentary republic and pluripartyism (1946- 1948), the novel makes clear the equalitarian perspective betraying the represented moment, when hopelessness crowned the political and social life. Carlo Lizzani shoots his adaptation in the closure of horizons caused by the restoration of the conservative forces (1953), reducing the visionary focus of the narrative and representing the past from the disillusionments of the present.

The sailboat island and the New Horizons trajectory

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Memória e identidade em Jaguariaíva, Paraná: contribuição à cartografia escolar

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)