Prior residence and body size influence interactions between black sea urchins

Body size and prior residence can modulate agonistic interaction in several animal species, but scientists know little about these relationships in echinoderms. In this study, we tested the effects of these traits on interactions in the black sea urchin (Echinometra lucunter). After a sea urchin was isolated for 24-h in a glass tank to establish prior residence, we introduced an intruder animal adjacent to the resident in the tank and observed interactions for 30 min. The intruder animal was larger, smaller, or size-matched to the resident. We found body size and prior residence concomitantly modulated interactions among black sea urchins, with prior residence as the major determinant. Black sea urchins mainly exhibited opponent inspection and fleeing responses during interaction to avoid fights, especially when a fight could be seriously disadvantageous (small intruder vs. large resident). (C) 2008 Elsevier B.V. All rights reserved.

Desempenho motor no esporte: das restrições do iniciante ao experiente

A set of constraints on the performance of motor skills is a determinant factor of success in many sport modalities that require from the athlete continuous adaptation to changes in the game context. Taking into account Newell's model of organism (or performer), task and environmental constraints in the acquisition of motor skills (NEWELL, 1986), the focus of this study is the set of changes that take place in motor behavior from the beginner to the high level athlete. In specific, the focus is toward changes in sports settings in which the ball is the center of the game, responsible for the relationship among athletes of the same team as well as between opponents, as in volleyball. The ball, in its trajectory, carries on a set of constraints to the player's behavior. To be able of imposing constraints on the opponent's behavior is so important as to know how to deal with a ball sent to you by the opponent in an unpredictable trajectory.

Vargas e Prestes: uma comparação entre o trabalhismo e o comunismo no Brasil

Este texto veio a constituir parte do segundo capítulo de nossa tese de Mestrado - O Ato Livre: considerações a respeito da política operária - Faculdade de Filosofia, Letras e Ciências Humanas, Universidade de São Paulo. Nele, procuro mostrar a impressionante semelhança de pressupostos teóricos subjacentes tanto a um discurso que articula a concepção burguesa das relações sociais, criado para o controle da c/asse operária, quanto a seu suposto oponente, que articularia a concepção socialista e que, explicitamente, estaria desenvolvendo o ponto de vista marxista. Com esse objetivo, cotejo os discursos de Getúlio Vargas (pronunciados nos anos de 1946 e 1947) com os quase contemporâneos discursos de Luis Carlos Prestes (escritos em 1945). Concluo com uma breve reflexão a respeito da origem desses pressupostos no interior do movimento comunista internacional.

Industrial Robotics Applied to Education

This work describes a ludic proposal for programming learning of industrial robots to be developed by groups of engineering students. Two projects are presented: Tic-tac-toe Opponent Robot and Environmentalist Robot. The first project use competitive search techniques of the Artificial Intelligence, computational vision, electronic and pneumatic concepts for ability decision making for a robotic agent on the tic-tae-toe game. The second project consists of a game that contains a questions and answers database about environmental themes. An algorithm selects the group of questions to be answered by the player, analyses the answers and sends the result to a industrial robot through serial port. According with the player performance, the robot makes congratulation movements and giving a gift to the winner player. Otherwise, the robot makes movements, disapproving the player performance.

A representação do sertão na metrópole: a construção de um gênero musical (1929-1940)

Pós-graduação em História - FCHS

Historiografia literária e formação do cânone: Ana Miranda, Augusto dos Anjos e Olavo Bilac

Pós-graduação em Letras - IBILCE

Avaliação de oponentes en confrontos de tilápia-do-Nilo: interação entre sinais químicos e visuais

Pós-graduação em Aquicultura - FCAV

O leitor na reportagem de revista: um estudo das marcas da interação no gênero

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Ejes estratégicos de la seguridad hemisférica en los gobiernos de George W. Bush y Barack Obama

The paper approaches the U.S. perceptions about the sources of insecurity from Latin America, considered a low risk area and priority of its foreign policy. El análisis se concentra en la evaluación de las amenazas y desafíos a sus intereses estratégicos y las modalidades de actuación privilegiadas en la esfera regional, en que se verifican coincidencias entre las administraciones Demócratas y Republicanas en la adopción de un liderazgo con prerrogativas clasificatorias sobre los tipos de régimen político, con una agenda concebida como promoción de la convergencia hemisférica de democracias y economías liberales. The analysis focuses on assessing the threats and challenges to its strategic interests and privileged modes of action at the regional level, which verifies similarities between Republican and Democratic administrations in taking a leadership prerogatives qualifiers on the types political regime, with an agenda designed as promoting hemispheric convergence of liberal democracies and economies. En ese contexto, cabe destacar la prioridad atribuida a los países de la Alternativa Bolivariana para las Américas (ALBA) como eje opositor de sus políticas. In this context, include the priority given to the countries of the Bolivarian Alternative for the Americas (ALBA) as the linchpin of his political opponent.

Variable assessment of wing colouration in aerial contests of the red-winged damselfly Mnesarete pudica (Zygoptera, Calopterygidae)

Wing pigmentation is a trait that predicts the outcome of male contests in some damselflies. Thus, it is reasonable to suppose that males would have the ability to assess wing pigmentation and adjust investment in a fight according to the costs that the rival may potentially impose. Males of the damselfly Mnesarete pudica exhibit red-coloured wings and complex courtship behaviour and engage in striking male– male fights. In this study, we investigated male assessment behaviour during aerial contests. Theory suggests that the relationship between male resource-holding potential (RHP) and contest duration describes the kind of assessment adopted by males: self-assessment, opponent-only assessment or mutual assessment. A recent theory also suggests that weak and strong males exhibit variations in the assessment strategies adopted. We estimated male RHP through male body size and wing colouration (i.e. pigmentation, wing reflectance spectra and transmission spectra) and studied the relationship between male RHP and contest duration from videodocumented behavioural observations of naturally occurring individual contests in the field. The results showed that males with more opaque wings and larger red spots were more likely to win contests. The relationships between RHP and contest durations partly supported the self-assessment and the mutual assessment models. We then experimentally augmented the pigmented area of the wings, in order to evaluate whether strong and weak males assess rivals’ RHP through wing pigmentation. Our experimental manipulation, however, clearly demonstrated that strong males assess rivals’ wing pigmentation. We finally suggest that there is a variation in the assessment strategy adopted by males

Variable assessment of wing colouration in aerial contests of the red-winged damselfly Mnesarete pudica (Zygoptera, Calopterygidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Adolescentes em conflito com a lei e sua noção de regras no jogo de futebol

Adolescents with a course of life based on the lack of ethical and moral values are more vulnerable to the practice of infractions, and in this case the statute of the child and adolescent assumes their insertion on socio educative measures. The objective of this research is to identify the moral development phase in adolescents who are in confl ict with the law. Thirty male adolescents between fi fteen and eighteen years old, who are inserted on the socio educative care Center, were studied. Data were collected through futsal game observation, without the presence of a referee and structured interview, according to the general lines of the Clinical Method of PIAGET (1994). The arrangement of the collected data confi rmed our hypothesis – these adolescents are still with the characteristics of a heteronomical moral, confi rmed by the differences between conscience and the practice of rules in a game situation. Although they know the rules, these are only respected in order to get some benefi ts, like not charging foul, deceive the opponent or simply win the match. It is presumed that the rules would only be respected in the presence of an authority (referee), because he would impose punishments and privations. However, it is believed that the results of this study may become a parameter to educators in order to create favorable situations which can be preventive and interventive to the socio moral development, minimizing suffering and seizing opportunities to the formation of citizens with higher ethical and moral standards, who are able to choose the way to the solidarity, cooperation and justice.

A utilização de material didático impresso para o ensino de um modelo de classificação do esporte na educação física escolar

Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC