Las desigualdades de clase en el comportamiento reproductivo en el Brasil: democratización incompleta y paradojas de la fecundidad juvenil

En este artículo se examina cómo fue el proceso de descenso de la fecundidad en las diferentes clases sociales en el Brasil, reflexionando sobre cuándo, cómo y en qué sentido se producen los cambios del lugar que ocupa la maternidad en la vida de las mujeres de diferentes estratos sociales. El análisis de clases se emplea para investigar diferenciales en las tasas de fecundidad, el tiempo de entrada en la maternidad, y la incidencia y efectos de la maternidad temprana. Se observa que existen desafíos propios de una democratización incompleta en cuanto al acceso a la anticoncepción y, teniendo en cuenta la evolución de los derechos a la salud sexual y reproductiva en el Brasil, se concluye exponiendo algunas reflexiones sobre los retos para su efectiva implementación.

Análise de propagação de ondas eletromagnéticas em ambiente indoor: modelo do caminho dominante versus traçado de raios e FDTD

Este trabalho trata de alguns modelos de propagação de ondas eletromagnéticas. Primeiramente, foram analisados modelos relacionados com a predição do sinal eletromagnético em ambientes indoor. Os modelos utilizados neste trabalho foram o Traçado de Raios, Caminho Dominante de Energia (DPM) e o FDTD. Para os dois primeiros modelos foi, utilizado um software comercial e para o método FDTD foi desenvolvido um algoritmo para o qual o sinal é analisado em um ambiente com a mesma geometria utilizada no software. Os resultados, para os pontos de recepção analisados, fornecidos pelos três modelos, são concordantes. Verifica-se a influência dos fenômenos de propagação na intensidade do sinal. A relevância deste trabalho encontra-se no fato de não haver, na literatura pesquisada, trabalhos que comparassem os três modelos de predição mencionados, além de propor temas para pesquisas futuras.

Violência simbólica contra educandos transmitida historicamente pela cultura dominante

The aim of this study is to conduct a reflective analysis of violence symbolic in the light of the specific case of ideology. For its realization as we starting point the participant observation in classrooms of elementary school. In this process selected two cases (from many observed) that have become emblematic in the production of this work, which brought elements of evident symbolic violence experienced by students. The schoolis part of a social system and ideological and historically constructed in its place there are many cases of students victims of this violence, which reveals the need for this issue to receive the appropriate attention. Remember that you need to understand the deeper aspects of violence practiced on a symbolic way which creates a culture that camouflages violent ideology behind.

Relacionamento entre as variáveis da corrida de aproximação e da posição de pé de apoio com a velocidade da bola nos chutes com o membro dominante e não dominante

The aim of the study was to analyze the relationship between run-up spatial-temporal variables with ball velocity in the dominant and non-dominant kicks, and to compare the ball velocity between contralateral limbs. Six futsal players (aged 13 and 14 years) participated in the study. The participants performed 4 kicks with maximal velocity in the stationary ball with each limb. Participants’ movements were recorded by 4 digital cameras (120 Hz). Dvideow software was used for kinematic procedures. The variables analyzed were: length and width of the last but one step and last step before ball contact, distance of the support foot to the ball, run-up velocity and ball velocity. The relationship between spatial-temporal variables with the ball velocity was analyzed by linear regressions with ball velocity as dependent variable. Student t test for paired samples was used to compare ball velocity between dominant and non-dominant kicks. For the dominant limb, the ball velocity was predicted only by the run-up velocity in 16.7%, while for the non-dominant limb only the distance of the support foot to the ball was prognostic variable in 11.9%. The ball velocity was greater for the dominant limb. Run-up variables that predictive ball velocity were different between the dominant and non-dominant kicks.