69 research outputs found

    A methodology for the efficient computer representation of dynamic power systems : application to wind parks

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    This contribution presents a methodology to efficiently obtain the numerical and computer solution of dynamic power systems with high penetration of wind turbines. Due to the excessive computational load required to solve the abc models that represent the behavior of the wind turbines, a parallel processing scheme is proposed to enhance the solution of the overall system. Case studies are presented which demonstrate the effectiveness and applications of the proposed methodology

    Generalization of Knuth's Formula for the Number of Skew Tableaux

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    Generalization of Knuth's Formula for the Number of Skew Tableaux

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    We take an elementary approach to derive a generalization of Kunth's formula using Lassalle's explicit formula. In particular, we give a formula for the Kostka numbers of a shape μn\mu\vdash n and weight (m,1nm)(m,1^{n-m}) for m=3,  4m=3,\;4

    Filipino village in Korea

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    Korea changed from a labor exporting country to a labor importing country during the 1990s. The development of the Korean economy and a labor shortage in the 3D industries (difficult, dirty, and dangerous) have made many foreigners from less developed Asian countries seek employment in Korea as trainees or undocumented workers. This migration transition has considerably influenced the social, cultural, and economic structure of Korea as well as the immigration policies of the Korean government. This is a case study of Filipino migrant workers, most of whom are low wage factory workers living in a city of suburban Seoul in Korea. These Filipino workers have established their community through a migrant center and a Catholic Church. In-depth interviewing and participant observation are the main research methods for this study. Filipino Village is the center of their community in the city. Most chapters of this study describe the lives of these people, focusing on several topics--the process of coming to Korea, housing and community, family relations, work and labor problems, racial relations and discrimination, and dreams for the future. Their stories illustrate the difficulties of assimilation and the process of marginalization of foreign workers in a host society. Individual experiences of migrant workers are interpreted in the context of the macrostructure of migration, and their community is discussed as a racial and ethnic minority group. The roles of migrant centers and the Korean government are discussed in the terms of protection and control of migrant workers. The heart of the problems regarding immigrant workers in Korea, including Filipino workers, can be summarized by two features: their invisibility and their temporary residential status. Korean society keeps immigrant workers invisible and prevents their becoming members of society in many ways. The boundary between Koreans and immigrant workers is clear and deep. The racial and ethnic differentiation between immigrant workers and Koreans as well as the immigrant workers\u27 economic status at the bottom of the job structure and their lack of legitimacy to work in Korea marginalize them and keep them as outsiders in Korean society
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