The aim of this work is analyse the selected proposition of magazines made with a group of black women, garbage collector of Santa Maria city, RS, to verify, from to the indicator of subjectivity, how they build a self image, the ethos, and how is established the relation of power in their discurses. The corpus of this work is composed by ten selected propositions of magazines. The search was made based on the methodological proposal of Bakhtin (1999), that contemplates both the verbal sphere as the context of use and the perspective of dialogism. The notion of ethos of Maingueneau (2001, 2005) and Amossy (2005) and the subjectivity in language studied by Orecchioni (1980) and Neves (2007), beyond other names, as Bourdieu, Scott (1995), Hall (1997), were important to achieve to the obtained results. The analysis demonstrates that, in the discurse of those women, it is evident that exist an asymmetry among genres, races/ethnic group and the social classes. / O objetivo deste trabalho é analisar enunciados selecionados de entrevistas realizadas com um grupo de mulheres negras, catadoras de lixo, da cidade de Santa Maria, RS, a fim de verificar, a partir dos indicadores de subjetividade, como elas constroem a imagem de si, ou seja, o ethos e como se estabelecem as relações de poder nos seus discursos. O corpus deste trabalho é composto por dez enunciados selecionados das entrevistas. A pesquisa foi realizada com base na proposta metodológica de Bakhtin (1999), que contempla tanto a esfera verbal quanto o contexto de uso e a perspectiva do dialogismo. A noção de ethos de Maingueneau (2001, 2005) e Amossy (2005) e da subjetividade na linguagem estudada por Orecchioni (1980) e Neves (2007), além de outros nomes, como Bourdieu, Scott (1995), Hall (1997), foram importantes para que se pudesse chegar aos resultados obtidos. As análises demonstraram que, nos discursos dessas mulheres, evidenciou-se que há assimetria entre os gêneros, as raças/etnias e as classes sociais.

This thesis deals with the designing of a garbage collector for the PNtalk virtual machine. It describes and rates the approaches and algorithms for an automatic memory management. Four algorithm families ale presented: mark-sweep, mark-compact, copying algorithms and reference counting. At first it describes sequential forms, that pauses running of the main program (mutator), then it describes parallel and concurent forms, that do not pauses the mutator. The thesis also presents generational model of garbage collecting. The following sections briefly introduces object orientated Petri nets. The result of this thesis is the design of the generational garbage collector for the PNtalk virtual machine.