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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Geology of Lagoa das Furnas, a crater lake on São Miguel, Azores archipelago

Andersson, Thommy January 2015 (has links)
In this thesis, the results from a geophysical mapping and coring campaign of Lagoa das Furnas are presented. Specific focus is placed on the origin of a subaqueous volcanic cone mapped in the southern part of the lake. Lagoa das Furnas is a crater lake within the Furnas volcanic centre which is located on the island of São Miguel in the Azores archipelago. The Furnas volcanic centre has a long history of earthquakes and volcanic activity. The area is relatively well-studied, except for the lake floor. Therefore, a high resolution geophysical and geological mapping survey was conducted at Lagoa das Furnas. Sidescan sonar was used to map the surface of the lake floor and single beam sonar was used to acquire sub-bottom profiles. In addition to the geophysical mapping, sediment surface sampling and core drilling were carried out followed by geochemical analyses of the retrieved material. The mapped data permitted a characterisation of the floor of Lagoa das Furnas and revealed several volcanic features including fumarole activity and a volcanic cone in the southern part of the lake. In order to unravel the origin of this cone several methods were applied, including analyses of tephra and minerals collected from the cone itself and from nearby deposits of two known eruptions Furnas I and Furnas 1630. Sedimentological, petrological, geochemical and geochronological studies of pyroclastic deposits from the cone suggest a subaqueous eruption linked to the Furnas 1630 eruption. The chemistry of glass and crystal fragments sampled from the cone suggests that it is composed of more evolved magma than that of the main Furnas 1630 implying that the lake cone is likely a product of the last eruptional phase. Historical documents reveal three lakes in Furnas valley before the 1630 eruption. Two of these lakes were lost due the eruption and the remaining lake is most likely Lagoa das Furnas and consequently did exist before the 1630 eruption.
12

Monitoramento e aprendizado estratégico: o caso Furnas

Marconi, Paola 03 November 2015 (has links)
Submitted by Paola Marconi (paolapmarconi@gmail.com) on 2015-12-13T15:01:49Z No. of bitstreams: 1 DISSERTAÇÃO_Paola Marconi_r50_Final.pdf: 1652611 bytes, checksum: cc47efaa2f931f1ec306b20b60fa185f (MD5) / Approved for entry into archive by ÁUREA CORRÊA DA FONSECA CORRÊA DA FONSECA (aurea.fonseca@fgv.br) on 2015-12-15T13:45:17Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO_Paola Marconi_r50_Final.pdf: 1652611 bytes, checksum: cc47efaa2f931f1ec306b20b60fa185f (MD5) / Approved for entry into archive by Marcia Bacha (marcia.bacha@fgv.br) on 2015-12-21T18:20:06Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO_Paola Marconi_r50_Final.pdf: 1652611 bytes, checksum: cc47efaa2f931f1ec306b20b60fa185f (MD5) / Made available in DSpace on 2015-12-21T18:20:22Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO_Paola Marconi_r50_Final.pdf: 1652611 bytes, checksum: cc47efaa2f931f1ec306b20b60fa185f (MD5) Previous issue date: 2015-11-03 / This study investigated how the monitoring and strategic learning process by identifying the factors that influence the achievement of results. A literature search was conducted, through which it was possible to obtain a description of how the process should take place, what are the results that it should produce and what are the potential factors that influence them. Then, there was a documentary research in the studied company, allowing to describe how the monitoring and strategic learning process takes place in loco. To identify the factors that influence the achievement of results of the process in the company, there was a qualitative field research, along with executives of its purposive areas. The results obtained in these research stages allowed the understanding that the process takes place through the implementation of two cycles: the use and the learning and its core elements are the strategic meetings. It was possible to attest that, in Furnas, the process is running within the standards prescribed by the literature. However, since its deployment is recent, it only appears as a trend. It was also concluded that most of the factors identified by the executives of the company coincides with the mapped in the literature. In addition, among the factors identified in Furnas, company selected as an analytical field, the ones that most affect the operation of the process the monitoring and strategic learning process are concentrated in the 'management style' organizational dimension, namely: 'weak performance culture', 'top management sponsorship' and 'operational interference operating on the agenda of the strategic meetings.' / Este estudo investigou como é o processo de monitoramento e aprendizado estratégico, identificando os fatores que influenciam o alcance dos seus resultados. Realizou-se pesquisa bibliográfica, através da qual foi possível obter a descrição de como o processo deve ocorrer, quais são os resultados que deve produzir e quais são os fatores potenciais que os influenciam. Em seguida, realizou-se pesquisa documental na empresa estudada, o que permitiu descrever como o processo de monitoramento e aprendizado estratégico ocorre in loco. Para a identificação dos fatores que influenciam o alcance dos resultados do processo na empresa, realizou-se pesquisa de campo qualitativa, junto a executivos de suas áreas finalísticas. Os resultados obtidos nessas etapas de pesquisa permitiram a compreensão de que o processo se dá através da execução de dois ciclos: o de uso e o de aprendizado e que seus elementos centrais são as reuniões estratégicas. Foi possível atestar que, em Furnas, empresa selecionada como campo de análise, o processo está sendo executado dentro dos padrões prescritos pela literatura. No entanto, como a sua implantação é recente, isso somente configura-se como uma tendência. Concluiu-se ainda que a maior parte dos fatores apontados pelos executivos da empresa coincide com os mapeados na literatura. Além disso, dentre os fatores identificados em Furnas, os que mais afetam o funcionamento do processo de monitoramento e aprendizado estratégico concentram-se na dimensão organizacional 'estilo gerencial', sendo eles: 'fraca cultura de desempenho', 'patrocínio da alta direção' e 'interferências operacionais na pauta das reuniões estratégicas'.
13

Uma perspectiva pós-fordista na operação de sistemas elétricos

Garrofé, Paulo Henrique Simas January 2004 (has links)
Submitted by Marcia Bacha (marcia.bacha@fgv.br) on 2011-05-12T17:30:32Z No. of bitstreams: 1 000359429.pdf: 8439402 bytes, checksum: 02ebfb7bcc8f883a17fb543a2a1b3ec2 (MD5) / Approved for entry into archive by Marcia Bacha(marcia.bacha@fgv.br) on 2011-05-12T17:30:44Z (GMT) No. of bitstreams: 1 000359429.pdf: 8439402 bytes, checksum: 02ebfb7bcc8f883a17fb543a2a1b3ec2 (MD5) / Approved for entry into archive by Marcia Bacha(marcia.bacha@fgv.br) on 2011-05-12T17:31:21Z (GMT) No. of bitstreams: 1 000359429.pdf: 8439402 bytes, checksum: 02ebfb7bcc8f883a17fb543a2a1b3ec2 (MD5) / Made available in DSpace on 2011-05-12T17:31:30Z (GMT). No. of bitstreams: 1 000359429.pdf: 8439402 bytes, checksum: 02ebfb7bcc8f883a17fb543a2a1b3ec2 (MD5) Previous issue date: 2004 / This work intends to show, through a case study, that the implementation of a production and work organization model based on process management could be seen through a post-Fordist perspective in the operation of power systems. Large brazilian companies in the power industry have adopted, since their creation, an organizational model based on management rules proposed by Henri Fayol, in a vertical and hierarchical structure fashion. On the other hand, the tasks performed in the control rooms of their Operation Centers follow the schemes established by Frederick Taylor's Scientitic Administration system and the principIes proposed by Henry Ford. Nevertheless, due to changes in the institutional model of the power industry that took place in the mid-nineties and the increasing awareness of society toward its rights along with the workers' urge for the democratization of social relations in their working environment, these power industry companies were driven to seek for fresher styles of management, more suitable for the new cultural, political, social and economic scenario. The System Operation Department in FURNAS decided to embrace, as a new form of production and work organization, a system based on process management, yet respecting the functional structure of the company, thus creating a matrix organizational structure. Notwithstanding, it has been observed that, depending on the implementation form and the adopted management mechanisms, this new system could be seen through a post-Fordist perspective in the operation activity of bulk power systems, typically carried out in Brazil by Fayolist companies, according to a Taylorist-Fordist perspective. To verify the outcome of this implementation, a research was carried out in alI tive Operation Centers of the System Operation Department in FURNAS Centrais Elétricas S.A., having as a key element the following characterization of the post-Fordist paradigm: integrated differentiation of production and work organization under the trajectory of technological innovation toward the democratization of social relations in enterprise-systems. The paper presents the perception both of the evolution in the workers' interpersonal relations and of the managerial actions taken to introduce this new system and shows the occurred changes regarding the democratization of social relations in the Department as well, among other factors which substantiate the research, whose results point to a new form of work and production management where these social relations tend to follow dialogical managerial actions that characterize the post-Fordist perspective. / O objetivo deste trabalho é mostrar através de um estudo de caso que a implantação de um modelo de organização da produção e do trabalho baseado na gestão por processos pode acenar com uma perspectiva pós-fordista para a atividade de operação de sistemas de energia elétrica. As grandes empresas brasileiras do setor de energia elétrica adotaram, desde a sua criação, um modelo organizacional com base nas funções gerenciais propostas por Henri Fayol, sendo estruturadas de forma vertical e hierárquica. Por outro lado, as tarefas realizadas nas salas de controle dos Centros de Operação dessas empresas se processam de acordo com a forma preconizada pelo sistema de Administração Científica de Frederick Taylor e pelos princípios propostos por Henry Ford. Porém, em decorrência da mudança do modelo institucional do setor de energia, ocorrida em meados da década de 90, além da maior conscientização da sociedade a respeito dos seus direitos de cidadania e também da busca dos trabalhadores pela democratização nas relações sociais em seu ambiente de trabalho, as empresas de energia elétrica foram compelidas a buscar novas formas de gestão mais adequadas ao novo cenário cultural, político, social e econômico. Em FURNAS, como nova forma de organização da produção e do trabalho, o Departamento de Operação do Sistema resolveu adotar um sistema baseado na gestão por processos que respeita a estrutura funcional da Empresa, formando, assim, uma estrutura organizacional matricial. Por outro lado, observou-se que, dependendo da forma de implantação e dos mecanismos de gestão adotados, esse novo sistema podia acenar com uma perspectiva pós-fordista para a atividade de operação de sistemas elétricos de grande porte que, tipicamente, no Brasil, é desenvolvida por empresas fayolistas, segundo uma perspectiva taylorista-fordista. Para verificar se essa possibilidade se concretizou foi realizada uma pesquisa que abrangeu os cinco Centros de Operação do Departamento de Operação do Sistema de FURNAS Centrais Elétricas S.A., tomando como elemento-chave a seguinte caracterização do paradigma do pós-fordismo: diferenciação integrada da organização da produção e do trabalho sob a trajetória de inovação tecnológica em direção à ~ democratização das relações sociais nos sistemas-empresa. O trabalho apresenta a percepção da evolução nos relacionamentos interpessoais e a percepção das ações gerenciais empreendidas visando a implantação do novo sistema, bem como também mostra as transformações ocorridas no tocante à democratização das relaçõe~ sociais no Departamento, entre outros fatores que substanciam a pesquisa, cujo resultado aponta para uma nova forma de gestão do trabalho e da produção em que essas relações sociais tendem a ser pautadas por ações gerenciais dialógicas que caracterizam a perspectiva pós-fordista.

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