The location of the tibial accelerometer does influence impact acceleration parameters during running     

Angel Gabriel Lucas-Cuevas  Alberto Encarnación-Martínez  Andrés Camacho-García  Salvador Llana-Belloch  Pedro Pérez-Soriano 《Journal of sports sciences》2017,35(17):1734-1738

Tibial accelerations have been associated with a number of running injuries. However, studies attaching the tibial accelerometer on the proximal section are as numerous as those attaching the accelerometer on the distal section. This study aimed to investigate whether accelerometer location influences acceleration parameters commonly reported in running literature. To fulfil this purpose, 30 athletes ran at 2.22, 2.78 and 3.33 m · s^–1 with three accelerometers attached with double-sided tape and tightened to the participants’ tolerance on the forehead, the proximal section of the tibia and the distal section of the tibia. Time-domain (peak acceleration, shock attenuation) and frequency-domain parameters (peak frequency, peak power, signal magnitude and shock attenuation in both the low and high frequency ranges) were calculated for each of the tibial locations. The distal accelerometer registered greater tibial acceleration peak and shock attenuation compared to the proximal accelerometer. With respect to the frequency-domain analysis, the distal accelerometer provided greater values of all the low-frequency parameters, whereas no difference was observed for the high-frequency parameters. These findings suggest that the location of the tibial accelerometer does influence the acceleration signal parameters, and thus, researchers should carefully consider the location they choose to place the accelerometer so that equivalent comparisons across studies can be made.  相似文献   

Recent Semantic Developments on Models     

Agustín Adúriz-Bravo 《Science & Education》2015,24(9-10):1245-1250

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Soccer,nationalism and the media in contemporary Spanish society: La Roja,Real Madrid & FC Barcelona     

Vicente Rodríguez Ortega 《Soccer & Society》2016,17(4):628-643

This essay examines the relationship between nationalism and soccer in contemporary Spain. Firstly, it pays close attention to the roles of the national team and the rivalry between Real Madrid and FC Barcelona in articulating conflictual social agendas. Secondly, it compares how Spanish and Catalan media utilize the Spanish soccer team success to articulate clashing forms of nationalism. It scrutinizes a wide range of journalistic interventions as well as the TV coverage of the national soccer team in the Spanish and Catalan media to determine how they constantly re-articulate the role of soccer in defining the distinguishing characteristics of the nation. Lastly, it studies a series of soccer-related cultural and social practices such as street rallies, gatherings and celebrations in order to determine their role within contemporary nationalism in Spain.  相似文献   

V + H: Hybrid architecture for DSS and OLTP     

María del Pilar Angeles  Victor González Castro 《International Journal of Information Management》2013,33(6):940-947

Previous research has been done to identify the best pragmatic approach that DBMSs must follow to manage different workloads. Some approaches have followed the “One size fits all” approach, trying to incorporate all features in a row-oriented DBMS (also called horizontal) to manage both OLTP and DSS workloads. Additionally, there have been specialized DBMS, following a columnar approach (also called vertical), that focuses on the growing demand to efficiently manage DSS workloads. This paper proposes a combination of both vertical and horizontal DBMS to best manage OLTP and DSS workloads. We have used mature, commercially available products from a single vendor and developed a custom middleware Decision Query Module that identifies the best option for most efficient execution of a query. This V + H architecture also offers the functionality of a mirrored DB without paying twice for storage.  相似文献   

The Effectiveness of Concept Maps in Teaching Physics Concepts Applied to Engineering Education: Experimental Comparison of the Amount of Learning Achieved With and Without Concept Maps     

Guadalupe Martínez  Ángel Luis Pérez  María Isabel Suero  Pedro J. Pardo 《Journal of Science Education and Technology》2013,22(2):204-214

A study was conducted to quantify the effectiveness of concept maps in learning physics in engineering degrees. The following research question was posed: What was the difference in learning results from the use of concept maps to study a particular topic in an engineering course? The study design was quasi-experimental and used a post-test as a measuring instrument. The sample included 114 university students from the School of Industrial Engineering who were divided into two equivalent homogeneous groups of 57 students each. The amount of learning attained by the students in each group was compared, with the independent variable being the teaching method; the experimental group (E.G.) used concept maps, while the control group (C.G.) did not. We performed a crossover study with the two groups of students, with one group acting as the E.G. for the topic of optical fibers and as the C.G. for the topic of the fundamental particles of matter and vice versa for the other group. For each of the two topics studied, the evaluation instrument was a test of 100 dichotomous items. The resulting data were subjected to a comparative statistical analysis, which revealed a significant difference in the amount of learning attained by the E.G. students as compared with the C.G. students. The results allow us to state that for the use of concept maps, the average increment in the E.G. students’ learning was greater than 19 percentage points.  相似文献   

After the “At-Risk” Label: Reorienting Educational Policy and Practice     

Desiree Pallais  María José Ruiz González 《Multicultural Perspectives》2013,15(3):184-186

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Foreword     

Máirtín Ó'Murchú 《Irish Educational Studies》2013,32(1)

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Una introducción a los espacios vectoriales y al lenguaje logo a través del ordenador     

Antonio Bautista García-Vera 《Infancia y Aprendizaje》2013,36(33):99-117

Resumen

Este artículo presenta la posibilidad de programar conjuntamente unos contenidos informáticos con los d e otras materias del currículo escolar. Después de ilustrar esta posibilidad mediante la programación de unos contenidos sobre espacios vectoriales y lenguaje LOGO de programación de ordenadores, se indican algunos aspectos positivos que favorecen los procesos de aprendizaje de los alumnos.  相似文献   

The Rôle of Tape and Record in Music Teaching     

Prof. Bruno Prowaznik 《Educational Media International》2013,50(3-4):49-50

Owing to the acoustic dimension of music the technical media used in music teaching which serve to store and reproduce sounds, namely tapes and records, are of particular significance. Differences between tape and record in the quality of sound reproduction are few, and are primarily due to the type of tape-recorder and gramophone used. The preparation for sound reproduction must not take too much time and this argument favours the use of the record. But the fact that the musical examples needed for one teaching unit usually have to be collected from a great number of records, which is cumbersome and time-consuming, seems to recommend a combined system as the best solution. The production of efficient teaching aids for music in the form of tapes and records ought to be improved. Commercial firms produce records of musical examples; others produce educational records containing musical examples as well as spoken explanations. There are other records sampling musical quotations for a certain field of study.  相似文献   

“Fácilis descensus Averni” Mind,Brain, Education,and Ethics: Highway to Hell,Stairway to Heaven,or Passing Dead End?*     

Bruno della Chiesa 《Mind, Brain, and Education》2010,4(2):45-48

Are human beings born unequal when it comes to ethics? Or are ethical standards acquired? Or both nature and nurture? Neuroscience is on its way to discovering biological underpinnings of ethics in our brains. Whatever the upcoming findings on this front will be, our philosophical, political, and educational views, and even the way we look at ourselves as a species, could soon be radically challenged, if not altered. AENEIS, the special section of this journal dedicated to Educational Neuroscience and Ethics, seeks to shed light on the crucial and sometimes frightening questions and answers we are to be confronted with. Starting with Charles Lang (“Science, Education, and the Ideology of ‘How”’) and Zachary Stein (“On the Difference Between Designing Children and Raising Them: Ethics and the Use of Educationally Oriented Biotechnology”), we are embarking on a fascinating but dangerous learning journey. To navigate between Scylla and Charybdis, extreme caution is highly recommended.  相似文献