Gerardi Joannis Vossii rhetorices contractae sive partitionum oratoriarum : libri quinque : editio juxta exemplar lipsiense quantum fieri potuit diligentissime correcta, & duplice indice locupletataed.juxta exemplar lipsiense quantum fieri potuit diligentissime correcta, & duplice indice locupletata

Gerardus Johannes Vossius, filólogo e erudito holandês, nasceu em Heidelberg em 1577 e morreu em Amsterdã em 1649. Em 1632, transferiu-se para Amsterdã onde ensinou história no então fundado Athenaeum. Suas obras mais notáveis são sobre as heresias dos historiadores antigos. ‘Rethorices contractae’ é uma obra produzida em 1606, que contém regras sobre retorica e oratória. Formada por cindo livros ou partes o autor apresenta a natureza, o gênero e os tipos de retórica, o uso de figuras de linguagens e o estilo dos discursos para emprego nas diversas situações. No final do livro, encontra-se o índice remissivo de assuntos.

Transition Between Detonation and Deflagration in a Tube with a Cavity

In this paper, the transition of a detonation from deflagration was investigated numerically while a detonation wave propagates in a tube with a sudden change in cross section, referred to as the expansion cavity. The dispersion-controlled scheme was adopted to solve Euler equations of axis-symmetric flows implemented with detailed chemical reaction kinetics of hydrogen-oxygen (or hydrogen-air) mixture. The fractional step method was applied to treat the stiff problems of chemical reaction flow. It is observed that phenomena of detonation quenching and reigniting appear when the planar detonation front diffracts at the vertex of the expansion cavity entrance. Numerical results show that detonation front in mixture of higher sensitivity keeps its substantial coupled structure when it propagates into the expansion cavity. However, the leading shock wave decouples with the combustion zone if mixture of lower sensitivity was set as the initial gas.