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142.
Anna Bjerkefors Olga Tarassova Johanna S. Rosén Pascal Zakaria Anton Arndt 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):414-427
The purpose was to examine power output and three-dimensional (3D) kinematic variables in the upper limbs, lower limbs and trunk in elite flat-water kayakers during kayak ergometer paddling. An additional purpose was to analyse possible changes in kinematics with increased intensity and differences between body sides. Six male and four female international level flat-water kayakers participated. Kinematic and kinetic data were collected during three tasks; low (IntL), high (IntH) and maximal (IntM) intensities. No differences were observed in any joint angles between body sides, except for shoulder abduction. Significantly greater range of motion (RoM) values were observed for IntH compared to IntL and for IntM compared to IntL in trunk and pelvis rotation, and in hip, knee and ankle flexion. The mean maximal power output was 610 ± 65 and 359 ± 33 W for the male and female athletes, respectively. The stroke frequencies were significantly different between all intensities (IntL 59.3 ± 6.3; IntH 108.0 ± 6.8; IntM 141.7 ± 18.4 strokes/min). The results showed that after a certain intensity level, the power output must be increased by other factors than increasing the joint angular RoM. This information may assist coaches and athletes to understand the relationship between the movement of the kayaker and the paddling power output. 相似文献
143.
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
144.
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
145.
This article examines youth protests against education privatization in the post-Soviet countries of Latvia, Russia, and Ukraine. Drawing on a sample of online sources and scholarly articles, this study uses critical discourse analysis and visual methodologies to examine why and how post-Soviet university students have organized to protest against education privatization reforms. The study also critically analyzes visual and discursive representations of youth protests by government officials, mass media, and academia in the post-Soviet education space. The study reveals that while student protesters are deeply concerned about the future of public education, the messages (and images) generated by youth protesters are reappropriated in various ways by mass media, often beyond the control of protesters themselves. 相似文献
146.
Hendrik Lohse-Bossenz Olga Kunina-Habenicht Mareike Kunter 《European Journal of Psychology of Education - EJPE》2013,28(4):1543-1565
The aim of this study is to identify psychological topics within the areas of learning, development, and assessment that are especially important for teachers and should be included in the university teacher education curriculum. Based on the observation that teacher educators in psychology often face the challenge of having to select certain topics from a large body of possible content, at the risk of causing large variation of knowledge between teachers, we asked 48 experts from different fields of teacher education (psychologists, non-psychologists at university, and educators from the induction phase) to evaluate psychological topics with respect to their importance to teaching. In the following two rounds (Delphi method), experts selected topics which they felt should be taught at university. Although differences existed at the beginning, a ranking of topics was obtained. Further, we explored the way experts with different backgrounds achieved consensus to support the validity and acceptance of the results. Concluding, we discuss the usefulness of the results with a focus on the acquisition of psychological knowledge for teachers and to foster the position of educational psychology within teacher education. 相似文献
147.
148.
Olga Ververi 《Globalisation, Societies & Education》2017,15(4):518-530
This paper presents a neocommunitarian conception of citizenship identified in two textbooks of the programme ‘Education for Democratic Citizenship’, organised by the Council of Europe. Critical discourse analysis is applied to the key themes of the textbooks T-Kit 7: Under construction: Citizenship Youth and Europe and Compass Manual enclosing citizenship and human rights discourses, respectively. An intra-disciplinary discussion follows drawing on critical political economy. The findings of the analysis are that the textbooks exhibit an abstract representation of social reality as well as moral relativism stemming from neoliberal communitarianism. The identification of the neocommunitarian conception of citizenship reveals the power of citizenship education today. 相似文献
149.
Constant solutions to Yang-Baxter equation are investigated over Grassmann algebra for the case of 6-vertexR-matrix. The general classification of all possible solutions over Grassmann algebra and particular cases with 2,3,4 generators
are studied. As distinct from the standard case, whenR-matrix over number field can have a maximum 5 nonvanishing elements, we obtain over Grassmann algebra a set of new full 6-vertex
solutions. The solutions leading to regularR-matrices which appear in weak Hopf algebras are considered. 相似文献
150.