See how atoms dance     

Javier Aizpurua 《国家科学评论(英文版)》2020,7(5):833

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Reference power values for the jump squat exercise in elite athletes: A multicenter study     

Pedro L. Valenzuela  Michael McGuigan  Guillermo Sánchez-Martínez  Elaia Torrontegi  Javier Vázquez-Carrión  Zigor Montalvo 《Journal of sports sciences》2020,38(19):2273-2278

ABSTRACT

The present study aimed to provide reference values for lower-limb muscle power assessed during the incremental jump squat (JS) test in elite athletes (i.e., professional athletes competing at international level). We pooled data from all JS tests performed by elite athletes of different sports in two high-performance centres between 2015 and 2019, and computed reference values (i.e., terciles) for mean power (MP), mean propulsive power (MPP), and peak power (PP). Reference values were obtained from 684 elite athletes (458 male and 226 female) of 16 different sports (boxing, judo, karate, fencing, taekwondo, wrestling, basketball, soccer, futsal, handball, rugby union, badminton, tennis, long distance running, triathlon, and sprinting). Significant differences (p < 0.001) were found between male and female athletes for MP (7.47 ± 1.93 and 6.15 ± 1.68 W·Kg^?1, respectively), MPP (10.50 ± 2.75 and 8.63 ± 2.43 W·Kg^?1), and PP (23.64 ± 6.12 and 19.35 ± 5.49 W·Kg^?1). However, the velocity at which these power measures was attained seemed to be independent of sex (~0.95, 1.00 and 2.00 m·s^?1 for mean, mean propulsive, and peak velocity, respectively) and homogeneous across different sport disciplines (coefficient of variation <10%). These data can be used to classify athletes’ power capabilities, and the optimum velocity ranges provided here could be useful for training purposes.  相似文献   

Big Change Question Do Local Central Authorities (Lcas) Make A Difference In School Reform?     

F. Javier Murillo 《Journal of Educational Change》2005,6(1):77-86

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Advancing virtual patient simulations through design research and interPLAY: part I: design and development     

Atsusi Hirumi  Andrea Kleinsmith  Kyle Johnsen  Stacey Kubovec  Michael Eakins  Kenneth Bogert  Diego J. Rivera-Gutierrez  Ramsamooj Javier Reyes  Benjamin Lok  Juan Cendan 《Educational technology research and development : ETR & D》2016,64(4):763-785

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Between Scientific Ideas and Christian Religious Beliefs     

Peñaloza  Gonzalo  El-Hani  Charbel N.  Mosquera-Suárez  Carlos Javier 《Science & Education》2021,30(4):931-965

Science & Education - Despite the importance of evolution to understand living phenomena, evolution teaching confronts several tensions, especially with respect to teachers’ and...  相似文献   

Which instructional models influence more on perceived exertion,affective valence,physical activity level,and class time in physical education?     

Josune Rodríguez-Negro  Javier Yanci 《教育心理学》2020,40(5):608-621

Abstract

The aim of this study was to examine the effects of two different instructional models (i.e. direct instructional model (DIM) and tactical games model (TGM)) with primary education students. Perceived exertion, affective valence, physical activity (PA) level, instruction time, active learning time, and relation of instruction/active learning time were measured with 256 primary education students during DIM and TGM 8 weeks’ intervention programs. Significant differences were found between the DIM and TGM in perceived exertion, PA level, instruction time and in the relation between instruction/active learning time (p?<?.01, ES=?0.4 to 1.1). By age group, the DIM had significantly higher PA level in students of 3^rd grade of primary education (G3), 4^th grade (G4) and 6^th grade (G6) (p?<?.05 or p?<?.01, ES=?0.8 to ?0.4). The instructional model used during physical education classes can affect perceived exertion, PA level, instruction time, and the relation instruction/active learning time.  相似文献   

Extinction in multiple contexts: Effects on the rate of extinction and the strength of response recovery     

Javier Bustamante  Metin Uengoer  Anna Thorwart  Harald Lachnit 《Learning & behavior》2016,44(3):283-294

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Comparison between conceptions and assessment practices among secondary education teachers: more differences than similarities (Comparación entre concepciones y prácticas de evaluación en profesores de Educación Secundaria: más diferencias que semejanzas)     

Javier Fernández-Ruiz  Ernesto Panadero 《Infancia y Aprendizaje》2020,43(2):309-346

ABSTRACT

Teachers’ conceptions can affect any teaching practice, including assessment. Compared with the previous learning stages in Spain, the accreditation-based focus increases in secondary education. Therefore, it is necessary to study the conceptions teachers have of assessment during this stage and the role these play in their teaching practices. The study participants comprised 219 secondary education teachers. A mixed methodology including a questionnaire, dilemmas and the analysis of test contents was used. An analysis was implemented of the relationship between the conceptions of assessment and the type of tests used, self-assessment and peer assessment, and characteristics of feedback. The teachers reported having a formative conception, but this was incoherent with their assessment methods characterized by a scarce use of self-assessment and peer assessment and a hardly formative feedback. In conclusion, we highlight the relevance of the teaching-related conceptions in the education system and the need for working jointly with teachers to implement an authentically formative assessment in the classroom, with an emphasis on consistency between conceptions and practices.  相似文献   

Categorising computer science education research     

Mike Joy  Jane Sinclair  Shanghua Sun  Jirarat Sitthiworachart  Javier López-González 《Education and Information Technologies》2009,14(2):105-126

The interdisciplinary nature of Computer Science Education as a field of study is a complicating factor when authors are choosing appropriate journals and conferences for publishing research results. This paper reports a survey of 42 such publications in order to identify the types of paper frequently accepted for publication in each. We review existing taxonomies developed for the general fields of Computer Science and Education, and from this starting point, we develop a novel faceted taxonomy, specifically aimed to help new researchers in the field understand what types of papers are published and where they appear. Our results confirm previous studies indicating the predominance of practice-based, technology-driven reports. We also observe certain differences in educational themes between those found in publications grounded in the Computer Science Education corpus and those emerging from more general Higher Education literature.  相似文献   

Modes of learning and profitability in Colombian and Mexican SMEs     

Luis Enrique Valdez-Juárez  Omar Javier Solano-Rodríguez  Dominique Philippe Martin 《The Journal of High Technology Management Research》2018,29(2):193-203

The aim of this study is to analyze the effects of different modes of learning on innovation and profitability in SMEs in two Latin American countries; Mexico and Colombia. The data were obtained using a sample of 250 companies in the industrial sector operating in both countries. Results show that an integrated mode of learning based on internal and external knowledge supported by technological infrastructure have positive and significant effects on the degree of innovation and the profitability in SMEs However this effect appears to be not significantly different from the traditional SMEs mode of learning based mainly on market orientation.  相似文献