Size and power properties of some tests in the Birnbaum-Saunders regression model

The Birnbaum-Saunders distribution has been used quite effectively to model times to failure for materials subject to fatigue and for modeling lifetime data. In this paper we obtain asymptotic expansions, up to order n(-1/2) and under a sequence of Pitman alternatives, for the non-null distribution functions of the likelihood ratio, Wald, score and gradient test statistics in the Birnbaum-Saunders regression model. The asymptotic distributions of all four statistics are obtained for testing a subset of regression parameters and for testing the shape parameter. Monte Carlo simulation is presented in order to compare the finite-sample performance of these tests. We also present two empirical applications. (C) 2010 Elsevier B.V. All rights reserved.

Tests of proportional hazards and proportional odds models for grouped survival data

In this paper, we derive score test statistics to discriminate between proportional hazards and proportional odds models for grouped survival data. These models are embedded within a power family transformation in order to obtain the score tests. In simple cases, some small-sample results are obtained for the score statistics using Monte Carlo simulations. Score statistics have distributions well approximated by the chi-squared distribution. Real examples illustrate the proposed tests.

Búsqueda de nuevas rutas comerciales. Solón Wilches y las redes de poder en García Rovira, segunda mitad del siglo xix

This article presents a project formulated by the president of the Sovereign State of Santander, Solon Witches, to open new trade routes in order to create and maintain a network of power in the department of Garcia Rovira. First, the text highlights the political activity of General Witches to help his region; second, the commercial activities which surrounded his network of friends and family. Finally, the text answers the question of how associations worked around a main character in order to complete commercial transactions in a specific region.

O sentido da autoridade nas destituições do poder familiar em Marília a partir dos relatos dos operadores do direito na perspectiva do gênero

Pós-graduação em Ciências Sociais - FFC

Judicialização da vida: política judiciária na cidade de Marília/SP no tocante à garantia dos direitos fundamentais de crianças e adolescentes

Pós-graduação em Ciências Sociais - FFC

Frequência de ocorrência e fatores associados à hipertensão arterial em pacientes do Sistema Único de Saúde

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Luces y sombras en la vigencia y políticas de un partido provincial argentino : El Movimiento Popular Neuquino, 1983- 2010

El estudio se centra en el análisis del partido provincial de Neuquén, en el sistema político provincial y en la relación del entramado con la sociedad en las últimas décadas. La intención es explicar los momentos y la acción de los dirigentes políticos que tuvieron incidencia fundamental en la fuerza partidaria, en el estado provincial, su relación con la sociedad y con el Estado Nacional. Sin detenernos en los clivajes históricos que influyeron en la formación del MPN, hechos que motivaron el surgimiento de esta fuerza de inserción geográfica restringida a la provincia de origen, haremos mención a los mismos, al impacto que sufrió el peronismo local ante la emergencia y confluencia de los 'convocados' a constituir el Movimiento Popular Neuquino. Ese impacto adquirió una nueva dimensión en el contexto del 1973, año en que el Frejuli fue derrotado en Neuquén por el emepenismo, momento en que se constituyó en hegemónico en el sistema político neuquino; aunque adquirió nuevas fuerzas, propuestas, figuras y también surgieron tensiones a partir del regreso a la democracia

Luces y sombras en la vigencia y políticas de un partido provincial argentino : El Movimiento Popular Neuquino, 1983- 2010

El estudio se centra en el análisis del partido provincial de Neuquén, en el sistema político provincial y en la relación del entramado con la sociedad en las últimas décadas. La intención es explicar los momentos y la acción de los dirigentes políticos que tuvieron incidencia fundamental en la fuerza partidaria, en el estado provincial, su relación con la sociedad y con el Estado Nacional. Sin detenernos en los clivajes históricos que influyeron en la formación del MPN, hechos que motivaron el surgimiento de esta fuerza de inserción geográfica restringida a la provincia de origen, haremos mención a los mismos, al impacto que sufrió el peronismo local ante la emergencia y confluencia de los 'convocados' a constituir el Movimiento Popular Neuquino. Ese impacto adquirió una nueva dimensión en el contexto del 1973, año en que el Frejuli fue derrotado en Neuquén por el emepenismo, momento en que se constituyó en hegemónico en el sistema político neuquino; aunque adquirió nuevas fuerzas, propuestas, figuras y también surgieron tensiones a partir del regreso a la democracia

Luces y sombras en la vigencia y políticas de un partido provincial argentino : El Movimiento Popular Neuquino, 1983- 2010

El estudio se centra en el análisis del partido provincial de Neuquén, en el sistema político provincial y en la relación del entramado con la sociedad en las últimas décadas. La intención es explicar los momentos y la acción de los dirigentes políticos que tuvieron incidencia fundamental en la fuerza partidaria, en el estado provincial, su relación con la sociedad y con el Estado Nacional. Sin detenernos en los clivajes históricos que influyeron en la formación del MPN, hechos que motivaron el surgimiento de esta fuerza de inserción geográfica restringida a la provincia de origen, haremos mención a los mismos, al impacto que sufrió el peronismo local ante la emergencia y confluencia de los 'convocados' a constituir el Movimiento Popular Neuquino. Ese impacto adquirió una nueva dimensión en el contexto del 1973, año en que el Frejuli fue derrotado en Neuquén por el emepenismo, momento en que se constituyó en hegemónico en el sistema político neuquino; aunque adquirió nuevas fuerzas, propuestas, figuras y también surgieron tensiones a partir del regreso a la democracia

Collective subject`s ideological construction in drug-addicted people`s narratives.

In this paper, I analyzed, according to Discourse Analysis approach, the narratives of drug-addicted people which were found on a website of the drug rehabilitation and treatment clinic www.ctiviva.com.br. I could find common characteristics among the reported narratives that integrate the group’s opinion into the same ideological position. I could also find a collective subject, considering the narratives made by the drug-addicted people who were under treatment into the reported clinic whose site was mentioned before. That site displays the 10 narratives that composed this corpus research. That analysis focused the construction of the process that indicates a social position of group, considering three categories: key-expressions; key-ideas and anchorage, according to Lefèvre (2005). The first one indicates excerpts of testimonials that facilitates the key-words` identification; the second one, the key-words, indicates the meanings of each testimonial, and the last one, the anchorage, indicates the ideology of the discourse. Managing such categories enabled the identification of all the narratives as situation category, as proposed by Bertaux (2010). The results indicated two criteria that establish relationships of power: family and the good treatment. The construction of a collective subject evidenced the ideologies of the clinic and of the treatments that were given to the patients. 

Power of QTL detection using association tests with family controls

The power of testing for a population-wide association between a biallelic quantitative trait locus and a linked biallelic marker locus is predicted both empirically and deterministically for several tests. The tests were based on the analysis of variance (ANOVA) and on a number of transmission disequilibrium tests (TDT). Deterministic power predictions made use of family information, and were functions of population parameters including linkage disequilibrium, allele frequencies, and recombination rate. Deterministic power predictions were very close to the empirical power from simulations in all scenarios considered in this study. The different TDTs had very similar power, intermediate between one-way and nested ANOVAs. One-way ANOVA was the only test that was not robust against spurious disequilibrium. Our general framework for predicting power deterministically can be used to predict power in other association tests. Deterministic power calculations are a powerful tool for researchers to plan and evaluate experiments and obviate the need for elaborate simulation studies.

On an unexpected career path? Using Wittgenstein’s Family Resemblance concept to determine the power of projects to transform project management careers

The power of projects has been demonstrated by the growth in their use across an increasing range of industries and workplaces in recent years. Not only has the number of people involved in project management increased, but the qualifications and backgrounds of those people have also broadened, with engineering no longer being the only path to project management (PM). Predicting the career trajectories in Project Management has become more important for both organisations employing project managers and project managers building career portfolios. Our research involved interviewing more than 75 project officers and project managers across a range of industries to explore their career journey. We used Wittgenstein’s family resemblance theory is to analyse the information from the transcripts to identify the extent to which the roles of participants fit with the commonly accepted definition of project management. Findings demonstrate diversity of project manager backgrounds and experiences and relational competencies across these backgrounds that form and shape PM careers.

A new family of low-power CT/SUP 2/L circuits

A new family of low-power logic circuits, employing a multiemitter transistor input circuit and a modified complementary p-n-p n-p-n output stage, having almost the same performance as standard TTL circuits and suitable for IC use, is reported in this correspondence.

Local power of some tests in exponential family nonlinear models

In this paper we obtain asymptotic expansions up to order n(-1/2) for the nonnull distribution functions of the likelihood ratio, Wald, score and gradient test statistics in exponential family nonlinear models (Cordeiro and Paula, 1989), under a sequence of Pitman alternatives. The asymptotic distributions of all four statistics are obtained for testing a subset of regression parameters and for testing the dispersion parameter, thus generalising the results given in Cordeiro et al. (1994) and Ferrari et al. (1997). We also present Monte Carlo simulations in order to compare the finite-sample performance of these tests. (C) 2010 Elsevier B.V. All rights reserved.

Towards a Variety of Family Models: Economic Contributions of Spouses and Family Power

In Western societies the increase in female employment (especially among married women) is seen as having brought about the crisis of the traditional model of the family, reinforcing the position of the "modern" model - the egalitarian family with two working spouses and a "dual-career" family. In contrast, the transitional situation in the post-communist countries during the 1990s is producing a crisis of the family with two working spouses (the basic type of the communist period) and leading to new power relations within the family. While the growth of dual-earner households in this century has implied modification of family models towards greater symmetry of responsibility for breadwinning and homemaking, there is considerable evidence that women's increased employment does not necessarily lead to a more egalitarian approach to gender roles within the family. The group set out to investigate the economic situation of families and economic power within the fame as a crucial factor in the transformation of families with two working spouses in order to reveal the specific patterns of gender contracts and power relations within the family that are emerging in response to the current political and economic transformation. They opted for a comparative approach, selecting the Czech Republic as a country where the very similar tendencies of a few years ago (almost 100% of women employed and the family as a realm of considerable private freedom where both women's and men's gender identities and the traditional distribution of family responsibilities were largely preserved) are combined with a very different experience in terms of economic inequalities during the 1990s to that of Russia. In the first stage of the study they surveyed 300 married couples (150 in each country) on the question of breadwinning. They then carried out in-depth interviews with 10 couples from each country (selected from among the educated layers of the population), focusing on the process of the social construction of gender, using breadwinning and homemaking as gender boundaries which distinguish men from women. By analysing changes in social position and the type of interpersonal interaction of spouses they distinguished two main types of family contracts: the neo-traditional "communal sharing" (with male breadwinner, traditional distribution of family chores and negotiated family power) and the modern one based on negotiated agreement. The most important pre-conditions of husband-wife agreement about breadwinning seemed to imply their overall gender ideology rather than the economic and/or family circumstances. In general, wives were more likely to express egalitarian views, supporting the blurring or even elimination of many gender boundaries. Husbands, on the other hand, more often gave responses calling for the continued maintenance of gender boundaries. The analysis showed that breadwinning is still an important gender boundary in these cultures, one that is assumed unless it is explicitly questioned and that is seen as part of what makes a man a "real man". The majority of respondents seemed to be committed to egalitarian ideology on gender roles and the distribution of family tasks, including decision making, but this is contradicted by the persistent idea of the husband as the breadwinner. This contradiction is more characteristic of the Russian situation than of the Czech. The quantitative study showed a difference in prevailing family models between the two countries, with a clearer shift towards the traditional family contract in the Russian case. The Czechs were more likely to consider their partnerships as based on negotiated agreement, while the Russians saw theirs as based on egalitarian contract, in both cases seeing this as the norm. The majority of couples said they felt satisfied with their marriage, although in both countries wives seemed to be less satisfied. There was however a difference in the issues that aroused dissatisfaction, with Czech women being more sensitive to issues such as self-realisation, personal independence, understanding and recognition in the family, and Russians to issues of love, understanding and recognition. The most disputed area for the majority of families was chores in the home, presumably because in many families both husband and wife were working hard outside the home and because a number of partners had differing views as to the ideal distribution of chores within the family. The distribution of power in the family seems to be linked to the level of well being. The analysis showed that in the dominant democratic model there is still an inverse connection between family leadership and well being: the more prominent the wife's position as head of the family is, the lower the level of family income. This may reflect both the husband's refusal to play the leading role in the family and even his rejection of any involvement in family issues in such a family. The qualitative research revealed that both men and women see the breadwinning role to be an essential part of masculine identity, a role which the female partner would take on temporarily to assist the male but not permanently since this would threaten the gender boundaries and the man's identity. At the same time, few breadwinners expressed a sense of job satisfaction and all considered their choice as imposed on them by the circumstances (i.e. having a family in difficult times). The group feel that family orientation and some loss of personal involvement in their profession is partly reflected in the fact that many of the men felt more comfortable and self-confident at home than at work. Women's work, on the other hand, was largely seen as a source of personal and self-realisation and social life. Eight out of ten of the Russian women interviewed were employed, although only two on a full-time basis, but none saw their jobs as adding substantially to the family budget. Both partners see the most important factor as the wife's wish to work or stay at home, and do not think it wise for the wife to work at the expense of her part of the "family contract", although husbands from the "egalitarian" relationships expressed more willingness to compromise. The analysis showed clearly that wives and husbands did not construct gender boundaries in isolation, with the interviews providing clear evidence of negotiation. At the same time, husbands' interpretations of their wives' employment were less susceptible to the influence of negotiation than were their gender attitudes and norms about breadwinning. One of the most interesting aspects of the spouses' negotiations was the extent to which they disagreed about what they seemed to have agreed upon. Most disagreements about the breadwinning boundaries, however, were over norms and were settled by changes in norms rather than in behavioural interpretation. Changes in norms were often a form of peace offering or were in response in changes in circumstances. The study did show, however, that many of the efforts at cooperation and compensation were more symbolic than real and the group found the plasticity of expressed gender ideology to be one of the most striking findings of their work. They conclude that the shift towards more traditional gednder distributions of incomes and domestic chores does not automatically mean the reestablishment of a patriarchal model of family power. On the contrary, it seems to be a compromise formation, relatively unstable, temporary and containing self-defeating forces as the split between the personal and professional value of work and its social value expressed in a money equivalent cannot be maintained for generations.