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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.
1

Possibilidade de confinamento no modelo SU(2)-Cor

Barbosa, Ana Lúcia [UNESP] January 1994 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:02Z (GMT). No. of bitstreams: 0 Previous issue date: 1994. Added 1 bitstream(s) on 2016-01-13T13:31:22Z : No. of bitstreams: 1 000180020.pdf: 1494829 bytes, checksum: b6bfd429cf090e3ee03be722e9d010d6 (MD5)
2

Sobre métodos de solução de modelos de Toda não abelianos

Cabrera Zúñiga, Carlos Humberto [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:31:24Z : No. of bitstreams: 1 000179986.pdf: 946874 bytes, checksum: 48700ec8702789aa7b7293f6410aa9c6 (MD5)
3

Aplicações do formalismo DDC ao estudo da interação da radiação com a matéria a baixas energias

Costa, Lúcio Campos [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:32:29Z : No. of bitstreams: 1 000179703.pdf: 1906078 bytes, checksum: 0e52220d7772cc149da8aa3d41f9c3c0 (MD5)
4

Análise dos efeitos da correção de camadas para a distribuição de massa do 'cálcio POT. 40'

De Conti, Andréa Cressoni [UNESP] January 1995 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:11Z (GMT). No. of bitstreams: 0 Previous issue date: 1995. Added 1 bitstream(s) on 2016-01-13T13:31:40Z : No. of bitstreams: 1 000179874.pdf: 1288105 bytes, checksum: e85b7582390ddc9ee59a540ab3f52a75 (MD5)
5

Teleparalelismo e a descrição da interação gravitacional

Andrade, Vanessa Carvalho de [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:31:36Z : No. of bitstreams: 1 000180078.pdf: 1256331 bytes, checksum: 2c6916d751132163a0788c959dfe7e60 (MD5)
6

Consequências fenomenológicas em anéis de colisão de modelos alternativos de quebra espontânea de simetria

Arroyo, Alfonso Raúl Zerwekh [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:31:41Z : No. of bitstreams: 1 000180008.pdf: 2306035 bytes, checksum: 32d1ab0cd6d18580963721737afbc29e (MD5)
7

A técnica dos pletismos e aplicações

Castilho Alcarás, José Antônio [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:27:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:31:43Z : No. of bitstreams: 1 000179968.pdf: 1451977 bytes, checksum: a607ad41251cf30719385937d635c9f3 (MD5)
8

Espaço de fase quântico discreto: considerações gerais e evolução temporal

Ruzzi, Maurizio [UNESP] January 2000 (has links) (PDF)
Made available in DSpace on 2016-01-13T13:28:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2000. Added 1 bitstream(s) on 2016-01-13T13:31:56Z : No. of bitstreams: 1 000179641.pdf: 1919401 bytes, checksum: d0ac39d6bb431999f60a1c1beef8e084 (MD5)
9

Obtenção das distribuições de carga/massa e momentos no 'INTPOT. 4 HE' com o método de coordenadas geradoras

Talarico, Marcello Antonio Alves [UNESP] 02 1900 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:25:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-02Bitstream added on 2014-06-13T20:53:28Z : No. of bitstreams: 1 talarico_maa_me_ift.pdf: 361026 bytes, checksum: 5a730dc52636ee298931463d66501029 (MD5) / Utilizamos o Método de Coordenadas Geradoras (MCG), o qual incorpora correlações de nosso interesse para a função de onda do núcleo de 'INTPOT. 4 HE', para o cálculo da densidade espacial e da distribuição de momentos. Inicialmente descrevemos o ansatz do MCG e apontamos os bem conhecidos problemas de instabilidade da função peso, solução de equação de Griffin-Wheeler; também apontamos como eles podem ser contornados com o procedimento de Piza e Passos. Desenvolvemos o método usando a interação nucleon-nucleon efetiva fenomenológica de Skyrme, a interação coulombiana e extraíndo o centro de massa do sistema. Finalmente os resultados são comparados com dados experimentais. Observa-se uma melhor descrição dos resultados na região de altos momentos transferidos / We use the Generator Coordinate Method (CGM), which take into account suitable correlations in the wave function of 'INTPOT. 4 HE' nuclei, to calculate the momentum distribution and spatial density. Firstly we describe the anzatz of the method and the well-known instability problems of the weight function, which is the solution of Griffin-Wheeler, furthermore we point out how they can be avoided with the use of the procedure proposed by Piza and Passos. We develop the method using the nucleon-nucleon fenomenological effective Skyrme interaction, Coulombian interaction and by extracting the center of mass of the sistem. Finally the results are compared with experimental data. We verify a better agreement of the results at the region of high transferred momenta
10

Integração em dimensões negativas em calibres covariantes e não-covariantes

Schmidt, Alexandre Grezzi de Miranda [UNESP] 02 1900 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:32:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-02Bitstream added on 2014-06-13T19:21:26Z : No. of bitstreams: 1 schmidt_agm_dr_ift.pdf: 423945 bytes, checksum: 7e72cb55ad496a8b66eca34baf5a8469 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Com a técnica da integração em dimensão negativa (NDIM) estudamos integrais de Feynman em calibres covariantes e não-covariantes, o do cone-de-luz e o de Coulomb. No primeiro caso, calculamos várias integrais ao nível de dois loops com e sem massa, e com momentos externos tanto na camada de massa quanto fora dela. Em calibres não-covariantes mostramos que podemos descartar a utilização de prescrições de calibre do cone-de-luz e mesmo assim obter resultados fisicamente compatíveis (que preservam a causalidade); no calibre de Coulomb integrais ao nível de um e dois loops podem ser facilmente resolvidas integrando em dimensão negativa, mas com dois parâmetros para as regularizar dimensionalmente / Abstracts: Using negative dimensional integration method (NDIM) we study several Feynman loop integrals pertaining to covariant and non-covariant gauges. In the first case we solve scalar integrals at two-loop level internal particles are massive or massless and external ones are even on or off-shell. Non-covariant gauges studied in this work are light-cone and Coulomb ones. We show that prescriptions, as well as any other devices such as partial fractioning and integration over components which are part of them, can be abandoned in the light-cone gauge, since NDIM can give us causality preserving results without invoking any of such prescriptions (Mandelstam-Leibbrandt for instance). In Coulomb gauge we also consider one and two-loop integrals in the context of split dimensional regularization

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