Made available in DSpace on 2016-12-08T16:19:03Z (GMT). No. of bitstreams: 1 CapaAdriana.pdf: 384998 bytes, checksum: e61670df7a94c985d32fc7fe0f31b8a7 (MD5) Previous issue date: 2008-11-17 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This master thesis deals with my current artistic practice that embraces collaborative and participative artistic processes that are connected to specific contexts. In this research, I discuss how procedures in my work are related to the universe of artistic procedures opened up since the 1960s that have sprung up with the questioning of the work of art as a consumer product, with the dissolution of traditional artistic categories and the contamination of artistic processes by situations, tensions e thematic concerns that derive form other areas in society. The first chapter is about participative artistic practices and some historic references, as well as a few examples of my earlier production that serve as a starting point for the analysis of the works presented in this thesis. The second chapter deals with the group of works realized throughout my artistic partnership with Bruna Mansani. I review participative action e tactics that try to produce an involvement in the situation to which they relate. Chapter three is about the project Espaço Contramão , a project run by artists and in which I took part from the beginning. Its main characteristics is its geographic mobility and the fact that it confers artistic direction to the participating hosts. Throughout the whole text, there are intersections with letters of mine in which I focus on my experience as a participant in projects by Laercio Redondo, Ricardo Basbaum and Rubens Mano. All these practices have as their common characteristics the fact that the creative process is shared with others, infused by situations that are marked by a temporary cooperation and that it plays with artistic possibilities that exist parallel to the official system of how to legitimize art / Esta pesquisa trata de minha prática artística neste exato momento, que compreende processos artísticos colaborativos, participativos e conectados a situações contextuais específicas. Nela, é abordada a relação desses procedimentos com um universo de práticas processuais que vêm sendo exploradas na arte contemporânea desde os anos 1960 e que se tornaram possíveis a partir do questionamento da obra de arte como produto de consumo, da desmaterialização das categorias artísticas tradicionais, e da contaminação por situações, tensões e temáticas próprias a outras esferas da sociedade. O primeiro capítulo trata a questão da participação e suas referências históricas, assim como de minha produção anterior, sendo esta o ponto de partida para a análise dos trabalhos presentes neste volume. O segundo capítulo trata de trabalhos realizados em parceria com a artista Bruna Mansani. Nele, são revistas ações participativas e táticas que procuram envolvimento com a situação com a qual se relacionam. O terceiro capítulo trata do "Espaço Contramão", iniciativa de artistas da qual faço parte. Ele tem como característica central a mobilidade e a entrega da articulação artística de uma exposição; curadoria, montagem e divulgação aos participantes. O texto é intercalado por cartas onde enfoco minha experiência como participadora em projetos dos artistas Laercio Redondo, Ricardo Basbaum e Rubens Mano. Todas essas práticas possuem como característica comum o compartilhamento do processo criativo com o Outro, diluído em situações que se configuram através de agenciamentos temporários e que jogam com possibilidades paralelas ao sistema de legitimação da arte

Hydropower research is often perceived to be an old and exhausted field of study but with ageing equipment and the need for more intermittent operation caused by an increased share of other renewable energy sources new challenges lie ahead. The main focus of this dissertation are the electromagnetic forces resulting from nonuniform air gap flux, whether it be caused by rotor eccentricity or a faulty field winding. Results are predominantly obtained from measurements on an experimental generator and numerical simulations. With the computational capacity available today it is possible to numerically analyse physical phenomena that previously could only be studied with analytical tools. Numerical models can also be expanded to encompass more than one aspect of generator operation in coupled field-circuit models without model complexity surpassing computer capability. Three studies of unbalanced magnetic pull, UMP, in synchronous salient pole generators constitute the main part of this thesis. The first is a study of how parallel stator circuits affect the unbalanced magnetic pull caused by rotor eccentricity. Depending on the relationship between the geometry of the separate circuits and the direction of the eccentricity it was found that parallel circuits could reduce the UMP substantially. Secondly, an investigation of the effect of damper winding configuration on UMP was performed. The results showed that damper winding resistivity and the distance between the damper bars in a pole determine the effectiveness of the damper winding in reducing the UMP. Simulations of a production machine indicate that the reduction can be substantial from damper windings with low resistivity. The third study analyses the consequences of field winding interturn short circuits. Apart from a resulting rotating unbalanced magnetic pull it is found that the unaffected poles with the same polarity as the affected pole experience an increase in flux density. In a fourth article a new stand still frequency response, SSFR, test method including measurements of damper winding voltage and current is presented. It is found that the identified models are capable of predicting the stator to damper transfer function both with and without the damper winding measurements included.