排序方式: 共有120条查询结果,搜索用时 31 毫秒
111.
112.
De Jesus K Figueiredo P De Jesus K Pereira F Vilas-Boas JP Machado L Fernandes RJ 《Journal of sports sciences》2012,30(7):715-723
During water polo matches, players use different front crawl styles. The purpose of this study was to conduct a kinematic analysis of three water polo front crawl styles: front crawl with head under water, front crawl with head above water, and front crawl when leading the ball. Ten proficient water polo players performed 3 × 15 m sprints in each front crawl style, which were recorded three-dimensionally by two surface and four underwater cameras. The results showed no differences in performance and several kinematic characteristics among the water polo front crawl styles. However, front crawl when leading the ball showed shorter stroke length and greater stroke frequency. Front crawl with head underwater presented greater maximal finger depth and elbow angle at mid-stroke position. Front crawl with head above water and when leading the ball showed greater trunk obliquity and maximal depth of right and left foot, and shorter kick stroke frequency. The findings suggest that proficient players learn to master front crawl with head above water to achieve top velocity. Despite the common use of the front crawl with head underwater as the basis for water polo fast displacement, coaches should emphasize the use of the specific water polo styles to attain high performance. 相似文献
113.
Beatriz Trinchão Andrade Olga Regina Pereira Bellon Luciano Silva Alexandre Vrubel 《Journal of Cultural Heritage》2012,13(1):28-39
Three-dimensional (3D) digital preservation aims at generating 3D models of objects that have cultural or scientific value. It allows realistic visualization of objects through virtual museums or scientific applications, and the restoration of the preserved object in case of natural wear or accidents. This work contributes to this research area by presenting a method to improve color texture quality of 3D models obtained from color and depth images of a laser scanner. Although this device offers precise depth information, the resulting color information is still poor and limits the generation of realistic textures. Our approach is to capture photographs of the object with a high-resolution digital camera and use them to generate a new color texture for the 3D model. Our work proposes a practical technique, easy to replicate, to generate high quality textures for 3D models from photographs. The method is composed by three main steps: (1) calibration of the image acquisition devices; (2) data acquisition; and (3) texture generation. In this paper, we detail our color texture generation method and apply it on the digital preservation of many artworks made by native Brazilians (indians) from the Wauja and Karaja communities. These indigenous communities are acknowledged as great ceramic artists, each bearing their own main themes, using a very rich symbolism in their paintings. Their artworks represent important aspects of the native South American culture and their digital preservation is motivated by three main reasons: (1) their fragility; (2) the paintings loose their original appearance with time; and (3) the possibility of extinction of these communities. We present several results of preserved artworks with enhanced quality realistic texture maps. Also, we present a methodology to analyze the quality and accuracy of texture maps. The resulting 3D models can be visualized through a tool we developed to support the virtual exhibit of 3D preserved heritage. 相似文献
114.
Beatriz Trinchão Andrade Caroline Mazetto Mendes Jurandir de Oliveira Santos Olga Regina Pereira Bellon Luciano Silva 《Journal of Cultural Heritage》2012,13(2):210-214
We present our recent efforts in the digital preservation of a set of baroque sculptures made by Antônio Francisco Lisboa, known as O. Aleijadinho, which is an important American baroque artist. The set was made in the beginning of the xix century and is composed of 12 near real sized sculptures, hand-carved in soapstone. These sculptures represent 12 of the 16 prophets from the Holy Bible and are part of a UNESCO World Heritage Site. Our group has been collaborating with UNESCO in a project that aims to preserve all these statues. We hereby present our initial efforts, consisting of the 3D digital preservation of the Prophet Joel sculpture. We developed a complete 3D digital preservation pipeline composed of four main stages: data acquisition, 3D reconstruction, texture generation and 3D model visualization. By evaluating our results in this first sculpture, we discuss the improvements we conceived before applying our pipeline in the remaining ones. Finally, we present the 3D model of the Prophet which registers the sculpture's current state and will be used in restoration, research and educational activities. We believe this contribution may be useful to guide further research on similar scenarios, showing how to avoid some practical mistakes and achieve good results. 相似文献
115.
The main objective of this paper is to show that a family arrangement in which the elderly co-reside with the young determines that the elderly support the public education expenditure. Considering that this type of family arrangement is more common in Latin American countries than in the United States, our study is concentrated in Brazil. This study is based on a panel of 2054 Brazilian municipalities using data from the 1991 and 2000 censuses. 相似文献
116.
Ruth Da Cunha Pereira 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1997,43(5-6):569-579
The paper focuses on the contribution of action research to teachers' in-service education at elementary schools in the Rio de Janeiro local system of education, linking thought and action indissolubly. This involves inviting teachers and learners to question their own practice, in their own process of building up citizenship, while striving to recover their place in a society that limits and makes their social relations difficult. The development of action research at the Faculty of Education in Rio de Janeiro State University, Rio de Janeiro, Brazil, has brought to light ethical, scientific and political questions in the school system. 相似文献
117.
Bruno Pereira de Moura João Carlos Bouzas Marins Sylvia Do Carmo Castro Franceschini Janice Sepúlveda Reis Paulo Roberto Dos Santos Amorim 《Journal of sports sciences》2015,33(6):545-551
Although exercise promotes beneficial effects in diabetic patients, some studies have questioned the degree of their importance in terms of the increase in total energy expenditure. In these studies, the decrease of physical activity levels (PAL) was referred as “compensatory effect of exercise”. However, our aim was to investigate whether aerobic exercise has compensatory effects on PAL in type 2 diabetes patients. Eight volunteers (51.1 ± 8.2 years) were enrolled in a supervised exercise programme for 8 weeks (3 d · wk?1, 50–60% of VO2 peak for 30–60 min). PAL was measured using tri-axial accelerometers in the 1st, 8th and 12th weeks. Biochemical tests, cardiorespiratory fitness, anthropometric assessment and body composition were measured in the 2nd and 11th weeks. Statistical analysis was performed using non-parametric tests (Friedman and Wilcoxon, P < 0.05). We found no significant differences in PAL between intervention periods, and participants spent the majority of their awake time in sedentary activities. However, the exercise programme generated a significant 14.8% increase in VO2 peak and a 15% reduction in fructosamine. The exercise programme had no compensatory effects on PAL in type 2 diabetes patients, but improved their cardiorespiratory fitness and glycaemic control. 相似文献
118.
Alves João Carvalho Luísa Carvalho Renato Correia Florbela Cunha Jorge Farinha Luís Fernandes Joana Ferreira Manuela Lucas Eugénio Mourato Joaquim Nicolau Ana Nunes Sara Nunes Sandra Oliveira Pedro Pereira Cristina Pinto Sandra Silva José 《Tertiary Education and Management》2015,21(2):81-98
Tertiary Education and Management - Higher education institutions and, particularly, polytechnic institutes in Portugal are, generally speaking, recognized as the key stakeholders in regional... 相似文献
119.
120.
Azevedo R. Rosário P. Magalhães P. Núñez J. C. Pereira B. Pereira A. 《European Journal of Psychology of Education - EJPE》2023,38(2):495-518
European Journal of Psychology of Education - Socioeconomic status has been a long-time discussed topic due to its impact on children’s school paths. However, despite extant research... 相似文献