Overall indexes of coordination in front crawl swimming     

Bruno Mezêncio  João Pedro Pinho  Rudolf Huebner  João Paulo Vilas-Boas  Alberto Carlos Amadio  Julio Cerca Serrão 《Journal of sports sciences》2020,38(8):910-917

ABSTRACT

The aim of this study was to propose a group of parameters able to quantify not only arm coordination but also inter limb coordination. These include the well know index of coordination with the relative duration of the stroke phases and two new parameters: the Index of synchronization (Ids) between arms and legs actions; and the Index of inter limb coordination (IdIC) calculated as the relative foot position during successive arm stroke phases. These parameters were compared between experts and amateur swimmers in a maximal front crawl sprint. The influence of arm stroke in leg kick parameters was also assessed, comparing the full stroke condition with a condition without arms actions. Sixty-five per cent of expert swimmers used synchronized limb actions while 95% of amateur swimmers used non-synchronized limb motions. These synchronized expert swimmers also converged towards a specific coordination pattern between foot position and arm stroke phases. In the condition without arms, both groups changed kick rate and amplitude. The present study reveals the interdependency of arms and legs actions and the importance of coordination and synchronization between limbs. Therefore, the proposed group of overall indexes of coordination provides a more complete marker for the analysis of swimming technique.  相似文献   

Energy System Contributions in Upper and Lower Body Wingate Tests in Highly Trained Athletes     

Ursula F. Julio  Valéria L. G. Panissa  Rubiana L. Cury  Marcus F. Agostinho  João V. D. C. Esteves  Emerson Franchini 《Research quarterly for exercise and sport》2019,90(2):244-250

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Segmentación fonológico-silábica y adquisición de la lectura: un estudio empírico     

María Soledad Carrillo  Julio Sánchez 《Cultura y Educación》2013,25(9):109-116

El artículo presenta una investigación cuyos resultados muestran la menor capacidad de segmentación silábica entre aquellos niños con peor habilidad lectora. Plantea también la funcionalidad, facilidad de aplicación y carácter motivador de la prueba realizada—una tarea de ordenador—para evaluar la capacidad de segmentación.  相似文献   

Online undergraduate students’ perceptions of the impact of Web 2.0 on higher education / Percepciones de estudiantes de licenciatura en línea sobre el impacto de la Web 2.0 en educación superior     

Julio Cabero-Almenara 《Cultura y Educación》2013,25(3):481-508

Abstract

Although Web 2.0 has changed students’ roles, placing them at the centre of the teaching-learning process, attitudes towards Web 2.0 have been observed to have a relation with its use in a formal academic context. An instrument was applied to higher education students in Mexico to explore their perceptions by collecting information on students’ attitudes, training and use of Web 2.0, and its impact on higher education. The findings showed that training in Web 2.0 determines use of it, as well as the attitudes towards it and the possible impact these can have on teaching-learning processes. No differences were found regarding participants’ gender in relation to their perceptions of the use of Web 2.0 as a learning environment.  相似文献   

History, Philosophy, and Science in a Social Perspective: A Pedagogical Project     

Andreia Guerra  Marco Braga  José Claudio Reis 《Science & Education》2013,22(6):1485-1503

Various studies have promoted instruction in the history and philosophy of science (HPS) in science classes, but the best way of putting this perspective into practice remains undetermined. To contribute to this issue, we developed a pedagogical project in some high schools in Brazil that aimed to present science content using an historical–philosophical approach focusing on the HPS from a social perspective. The content was developed broadly, highlighting the dialogues between science and the cultures in which scientific knowledge was accumulated. The results of the first stage of project implementation show that some strategies efficiently encouraged student discussion about science using an historical–philosophical approach. One successful strategy was the use of artistic material, such as movies and plays. The creative language and images in these elements allowed teachers to broaden historical–philosophical discussions without compromising science content. This project shows that a social approach to the HPS stimulates interdisciplinary discussions in science classes, enabling students to reflect on the nature of science.  相似文献   

What makes companies pursue an Open Science strategy?     

Markus Simeth  Julio D. Raffo 《Research Policy》2013

Whereas recent scholarly research has provided many insights about universities engaging in commercial activities, there is still little empirical evidence regarding the opposite phenomenon of companies disseminating scientific knowledge. Our paper aims to fill this gap and explores the motivations of firms that disclose research outcomes in a scientific format. Besides considering a dimension internal to the firm, we focus particularly on knowledge sourcing from academic institutions and the appropriability regime. We conduct an econometric analysis with firm-level data from the fourth edition of the French innovation survey (CIS) and matched scientific publications for a sample of 2512 R&D performing firms from all manufacturing sectors. This analysis provides evidence that firms are more likely to adopt academic principles if they need to access scientific knowledge that is considered important for their innovation development, whereas the mere existence of collaborative links with academic institutions is not a strong determinant. Furthermore, the results suggest that the inclination of firms to publish is sensitive to the level of knowledge spillovers in a sector and the effectiveness of legal appropriation instruments.  相似文献   

Towards teaching analytics: a contextual model for analysis of students’ evaluation of teaching through text mining and machine learning classification     

Okoye  Kingsley  Arrona-Palacios  Arturo  Camacho-Zuñiga  Claudia  Achem  Joaquín Alejandro Guerra  Escamilla  Jose  Hosseini  Samira 《Education and Information Technologies》2022,27(3):3891-3933

Education and Information Technologies - Recent trends in educational technology have led to emergence of methods such as teaching analytics (TA) in understanding and management of the...  相似文献   

Effects of adding a weekly eccentric-overload training session on strength and athletic performance in team-handball players     

Rafael Sabido  Javier Botella  Angel Navarro  Julio Tous-Fajardo 《European Journal of Sport Science》2017,17(5):530-538

To investigate the influence of adding a weekly eccentric-overload training (EOT) session in several athletic performance’s tests, 18 team-handball players were assigned either to an EOT (n?=?11) or a Control (n?=?7) group. Both groups continued to perform the same habitual strength training, but the EOT group added one session/week during a 7-week training programme consisting of four sets of eight repetitions for the bilateral half-squat and unilateral lunge exercises. The test battery included handball throwing velocity, maximum dynamic strength (1RM), countermovement jump (CMJ), 20?m sprint, triple hop for distance, and eccentric/concentric power in both the half-squat and lunge exercises. Data were analysed using magnitude-based inferences. Both groups improved their 1RM in the half squat, 20?m sprint time, and CMJ performance to a similar extent, but the EOT group showed a beneficial effect for both right [(42/58/0), possibly positive] and left [(99/1/0), very likely positive] triple hop for distance performance. In addition, the EOT group showed greater power output improvements in both eccentric and concentric phases of the half-squat (difference in percent of change ranging from 6.5% to 22.0%) and lunge exercises (difference in per cent of change ranging from 13.1% to 24.9%). Nevertheless, no group showed changes in handball throwing velocity. Selected variables related to team-handball performance (i.e. functional jumping performance, power output) can be improved by adding a single EOT session per week, highlighting the usefulness of this low-volume/high-intensity training when aiming at optimizing dynamic athletic performance.  相似文献   

Evaluating the impact of R&D tax credits on innovation: A microeconometric study on Canadian firms   总被引：1，自引：0，他引：1  

Dirk Czarnitzki  Petr Hanel  Julio Miguel Rosa 《Research Policy》2011,40(2):217-229

This study examines the effect of R&D tax credits on innovation activities of Canadian manufacturing firms. Over the 1997-1999 period the Federal and Provincial R&D tax credit programs were used by more than one third of all manufacturing firms and by close to two thirds of firms in high-technology sectors. We investigate the average effect of R&D tax credits on a series of innovation indicators such as: number of new products, sales with new products, originality of innovation, etc. using a non-parametric matching approach. Compared to a hypothetical situation in the absence of R&D tax credits, recipients of tax credits show significantly better scores on most but not all performance indicators. We therefore conclude that tax credits lead to additional innovation output.  相似文献   

History of science, physics, and art: a complex approach in Brazilian syllabuses     

Marco Braga  Andreia Guerra  José Claudio Reis 《Cultural Studies of Science Education》2013,8(3):725-736

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