ABSTRACT Portland cement pastes are highly heterogeneous material and exhibits heterogeneous features over a wide range of length scales. Mechanical properties of microstructure can be determined using depth-sensing indentation. Coupled indentation/SEM technique can be used to location the indents and provides a way to determine the mechanical properties of a specific phase. Thus, the present paper aims to determine the hardness of different phases of cement pastes prepared with different mineral admixtures including sugarcane bagasse ash. The microstmcture of cement pastes prepared with different mineral admixtures is analyzed by X ray diffraction, scanning electron microscopy and dynamic hardness tests on polished sections. The different backscatter coefficient allows to differentiate anhydrous phases from C-S-H, calcium hydroxide, silica fume and quartz. A grid of indentation is used to determine the hardness of the different phases and a complete phase segmentation of the different samples is achieved. The results show that the hardness of the different phases follow the sequence (from higher to lower hardness) quartz, anhydrous particles, calcium hydroxide, C-S-H and agglomerated silica fume. The presence of agglomerated silica fume is clearly observed in scanning electron microscopy images and the poor mechanical properties of these areas might compromise the cement pastes. The microstructure of cement pastes prepared with sugarcane bagasse ashes is similar to the observed in samples with crashed quartz.

A relação entre esporte e mídia é indissociável nos dias de hoje. Assim, o presente estudo teve como objetivo quantificar o número de notícias sobre o futebol profissional masculino e analisar a construção da imagem do treinador. Para isso, foram coletadas todas as notícias esportivas de um site de grande visitação durante trinta dias. Concluiu-se que há, nesse site, um direcionamento das notícias para o futebol masculino profissional e seus treinadores, sendo que as ideias transmitidas sobre eles são principalmente ligadas a sua competência e à articulação tática/técnica da equipe.

The relationship between sport and media is inseparable today. Therefore, this study aimed to quantify the number of news reports about male professional soccer, and analyze the construction of the image associated with soccer coaches. To this end, every sports news from a largely accessed website was collected for 30 days. It was concluded that, in Brazil, these news are directed to male professional soccer and its coaches, with the ideas concerning the latter being mainly related to their competence and the tactical/technical articulation of the team.

La relación entre el deporte y los medios de comunicación es indivisible. Así siendo, el estudio presente tuvo como objetivos cuantificar el número de noticias sobre fútbol profesional masculino analizando la construcción de la imagen del entrenador. Para eso fueron recopiladas todas las noticias deportivas de una página web de grande visitación durante 30 días. Se concluyó que existe, en Brasil un direccionamiento de las noticias para el fútbol masculino profesional y sus entrenadores, siendo que las ideas transmitidas sobre estos son principalmente vinculadas a su competencia y a la articulación táctica/técnica del equipo.

O objetivo deste estudo foi verificar o efeito do modelo de cargas seletivas durante um mesociclo preparatório em jogadores de futsal profissionais. Nove jogadores de futsal (23±2 anos) de uma equipe da Federação Paulista de Futebol de Salão compuseram a amostra, caracterizada como intencional. Aptidão aeróbia intermitente, salto horizontal, salto triplo unipodal, velocidade de 15m, agilidade e potência anaeróbia foram avaliadas em dois momentos: microciclo-2 (PRE) e microciclo-7 (POS). A análise estatística compreendeu o teste-t de Student e teste Wilxocon (P<0,05). Salto horizontal, aptidão aeróbia intermitente e potência média melhoraram, a velocidade nos 15 m piorou. O modelo de cargas seletivas é uma boa opção de periodização para o mesociclo preparatório no futsal.

The aim of this study was to verify the effect of selective loads model in professional futsal players, during a preparatory mesocycle. Nine futsal professional players (23±2 anos), from the team of Federation Paulista of soccer indoor championship, composed the sample, characterized by intentional. The players were evaluated in two moments although of a preparatory mesocycle, microcycle 2 (PRE) and microcycle 7 (POS), by the tests of intermittent aerobic fitness, horizontal jump, one leg triple jump, velocity of 15m, agility and anaerobic power. The statistical analysis included the Student-t and Wilxocon tests (P<0.05). The results of horizontal jump, intermittent aerobic fitness and medium power improved, the velocity at 15 m decreased. The select loads model is a good option for the periodization to preparatory mesocycle in futsal.

El objetivo de este estudio fue determinar el efecto del modelo con cargas selectivas durante el mesociclo preparatorio en jugadores de futsal. Nueve jugadores de futsal (23±2 anos) que pertenecen a un equipo de campeonato Paulista de Fútbol de Salón, compuso la muestra, que se caracteriza como intencional. Aptitud aeróbica intermitente, salto horizontal, triple salto con uno de los pies, velocidad del 15m, agilidad y potencia anaerobica fueron evaluados en dos momentos: mesociclo-2 (PRE) y mesocilo-7 (POS). Análisis estadístico incluyó la prueba del t-Student y la prueba del Wilxocon (P<0,05 ). Salto horizontal, aptitud aerobic intermitente y potencia media han mejorado, la velocidad en los 15 m ha empeorado. El modelo con cargas selectivas es una buena opción para la periodización durante mesociclo preparatorio en el futsal.