5,730 research outputs found
Bounds on topological Abelian string-vortex and string-cigar from information-entropic measure
In this work we obtain bounds on the topological Abelian string-vortex and on
the string-cigar, by using a new measure of configurational complexity, known
as configurational entropy. In this way, the information-theoretical measure of
six-dimensional braneworlds scenarios are capable to probe situations where the
parameters responsible for the brane thickness are arbitrary. The so-called
configurational entropy (CE) selects the best value of the parameter in the
model. This is accomplished by minimizing the CE, namely, by selecting the most
appropriate parameters in the model that correspond to the most organized
system, based upon the Shannon information theory. This information-theoretical
measure of complexity provides a complementary perspective to situations where
strictly energy-based arguments are inconclusive. We show that the higher the
energy the higher the CE, what shows an important correlation between the
energy of the a localized field configuration and its associated entropic
measure.Comment: 6 pages, 7 figures, final version to appear in Phys. Lett.
Monopoles on string-like models and the Coulomb's law
The t'Hooft-Polyakov monopole mass can be substantially altered, in the thick
GS and HC brane-world setup, and can be employed to constrain the brane
thickness limit. In this work, we comprise a brief review regarding gauge
fields localization in the string-like six dimensional brane-world models
setup. The correction to the Coulomb's law in two models is studied. Besides,
the monopole features are investigated from the point of view of the gauge
fields localization in the string-like brane-worlds and its thickness.Comment: 14 pages, 7 figure
Perturbed Self-Similar Massless Scalar Field in the Spacetimes with Circular Symmetry in 2+1 Gravity
We present in this work the study of the linear perturbations of the
2+1-dimensional circularly symmetric solution, obtained in a previous work,
with kinematic self-similarity of the second kind. We have obtained an exact
solution for the perturbation equations and the possible perturbation modes. We
have shown that the background solution is a stable solution.Comment: no figure
Production, breeding and potential of cowpea crop in Brazil.
About 50 years ago cowpea was reported as a relatively minor tropical legume. However, in the last years, it has been emerging as one of the most important food legume of the 21st century (SINGH, 2010). Brazil is not out of this panorama. Brazilian agriculture is undergoing major technological changes and, in addition, globalization in agribusiness has caused impacts on the production chain of several crops, particularly those heavily dependent on the use of a large volume of agricultural inputs, mainly fertilizers and pesticides. Such crops have had a higher production cost each year. On the other hand, this situation has brought new opportunities. Business farmers have sought new alternatives for their production arrangements. In this context cowpea constitutes one of the best options.bitstream/item/85620/1/Doc-216-Production.pd
Teor de carboidratos soluveis em plantulas de amendoim cv. BR1 submetido à diferentes nivéis de salinidade.
Avaliação econômica da cafeicultura adubada em Buritis, Rondônia, 2007.
O objetivo deste estudo foi avaliar o desempenho econômico de um sistema de produção de café convencional adubado no Município de Buritis, RO.bitstream/CPAF-RO-2010/14499/1/338-cafeiculturaemburitis.pd
Proteínas solúveis em plantas de gergelim BRS SEDA submetidas á condições de estresse salino.
Germinação de diferentes genótipos de feijão submetidos ao estresse hídrico pela diminuição do potencial osmótico.
O presente trabalho teve como objetivo simular condições padronizadas de déficit hídrico em laboratório para a avaliação da germinação de sementes de diferentes genótipos de feijão. O experimento foi realizado no Laboratório da Universidade Estadual de Goiás - Unidade Universitária de Ipameri
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