Simple analytical expression for vector hypernuclear asymmetry in nonmesonic decay ofΛ 5He andΛ 12C

We present general explicit expressions for a shell-model calculation of the vector hypernuclear parameter in nonmesonic weak decay. We use a widely accepted effective coupling Hamiltonian involving the exchange of the complete pseudoscalar and vector meson octets (π, η, K, ρ, ω, K*). In contrast to the approximated formula widely used in the literature, we correctly treat the contribution of transitions originated from single-proton states beyond the s-shell. Exact and simple analytical expressions are obtained for the particular cases of Λ 5He and Λ 12C, within the one-pion-exchange model. Numerical computations of the asymmetry parameter, aΛ, are presented. Our results show a qualitative agreement with other theoretical estimates but also a contradiction with recent experimental determinations. Our simple analytical formulas provide a guide in searching the origin of such discrepancies, and they will be useful for helping to solve the hypernuclear weak decay puzzle.

Tipificação das famílias de oito assentamentos rurais da região de Andradina (SP), com base em diferentes estratégias de produção e comercialização

This article intends to provide a typology of the families that are settled in the region of Andradina (Sao Paulo state), according to the main production and commercialization systems and to the presence (or not) of agricultural income diversification. The empiric data used to form the groups originate from socioeconomic questionnaires that had been applied to 169 families of eight rural settlements and also from 80 interviews. The groups were compared with each other, starting from the family's profile; patrimony; credit and technical support; self-consumption production; and the lot's external income. The strategy to increase the production and the productivity (dairy cattle) is limited to less than a quarter of the producers, however different strategies had been used by families, such as the diversification of the agricultural income and the direct sale to the consumer or to the retail trade. The association of the production diversification with the use, in a regular way, of differentiated channels of commercialization demonstrated a strategy capable to approximate the indicators of this type of producer comparing with those that focused on increasing the production and the productivity. This verification is important because, even though there is no necessary contradiction among both strategies, a part of the families does not have resources, infrastructure and/or technical qualification to follow the way of the productive intensification and others do not have this project as a priority.

Open regionalism in Asia Pacific and Latin America: a survey of the literature

Includes bibliography

From hard-peg to hard landing?: recent experiences of Argentina and Ecuador

Includes bibliography

Estereótipos da mulher no discurso de autoajuda

Building on the foundations of French Discourse Analysis and Social Psychology's developments on the issue of stereotypes, this paper analyzes the images of women available in works of self-help for women. With this purpose in mind, we have especially taken into account aphorizing enunciations present in works of this kind currently circulating in the market. The analysis shows the contradiction inherent to the self-help discourse for women, which proposes to women a pattern of behavior consistent with their emancipation, but, at the same time, contributes to keeping certain female stereotypes associated with their traditional roles.

Associational life and local development in two Nicaraguan villages

Includes bibliography

Show da fé e de sentido(s): o universo eclesial como mediação sociocultural

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A concepção de desenvolvimento sustentável nos parâmetros curriculares nacionais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Políticas neoliberais e educação pós-moderna no ensino paulista

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As potencialidades do RPG (Role Playing game) na educação escolar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Escola cidadã: questão acerca da educação escolar em tempos de crise estrutural do capital

Pós-graduação em Educação Escolar - FCLAR

Um estudo sobre a saúde do professor a partir da perspectiva da sociologia sensível de Michel Maffesoli

Pós-graduação em Educação Escolar - FCLAR

A dialética do conhecimento científico, a prática e a experimentação: uma análise do ideário de licenciandos e sua relação com a epistemologia da ciência moderna

Pós-graduação em Educação para a Ciência - FC

A relação com os saberes da educação física: os pontos de vista dos alunos jovens em relação à disciplina educação física em uma escola pública federal

Pós-graduação em Educação - FCT

Kant e o fim da modernidade pré-crítica: os sonhos de um visionário

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)