31,012 research outputs found
Confinement in the 3-dimensional Gross-Neveu model
We consider the -components 3-dimensional massive Gross-Neveu model
compactified in one spatial direction, the system being constrained to a slab
of thickness . We derive a closed formula for the effective renormalized
-dependent coupling constant in the large-N limit, using bag-model boundary
conditions. For values of the fixed coupling constant in absence of boundaries
, we obtain ultra-violet asymptotic
freedom (for ) and confinement for a length such that , being the fermionic mass. Taking
for an average of the masses of the quarks composing the proton, we obtain
a confining legth which is comparable with an estimated proton
diameter.Comment: Latex, 4 pages, 2 figures (one new), some changes in tex
LAMINAR FORCED CONVECTION IN HORIZONTAL CHANNEL WITH HEAT GENERATION PLATES COOLED BY WATER
This paper describes the study of the behavior of two-dimensional and parallel horizontal flat plates with uniform internal heat generation subjected to laminar forced convection of water. The governing equations are solved numerically using the finite volume technique with Power-Law interpolating scheme and the SIMPLE algorithm. After the simulations the temperature and velocity fields were obtained for various plates spacing and fluid inlet velocities, as well as the Nusselt number values
Produção de leite por dia de intervalo de partos em um rebanho mestiço Europeu x Zebu em São Carlos, SP.
Levantamento de dados sobre produção e mercado de sementes forrageiras de clima temperado na região da Campanha do Rio Grande do Sul.
SIEPE
Manejo integrado de pragas do algodoeiro no Brasil.
Introducao; Insetos-praga; Amostragem de pragas; Estrategias de controle; Considera?oes importantes; Perspectivas futuras;bitstream/item/33370/1/MIP-ALGODAO.pd
Flutuação de infestação da broca-do-café (Hypothenemus Hampei, Ferrari) em Rondônia, 2002.
Introdução; Material e métodos; Resultados e discussão; Conclusões; Referências bibliográficas.bitstream/item/70954/1/BPD11-brocadocafe.pd
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