Accelerometry-Based Characteristics of Overall Sedentary Behavior and Sitting in Middle-Aged Adults     

Petra Tjurin  Maisa Niemelä  Maarit Kangas  Henri Vähä-Ypyä  Harri Sievänen  Timo Jämsä 《Measurement in physical education and exercise science》2013,17(3):249-257

ABSTRACT

The purpose of this study was to describe the accelerometry-based characteristics of overall sedentary behavior (SB) and sitting among adults under free-living conditions. Thirty-six (mean age 47.6 years) volunteers carried a waist-worn accelerometer for ≥4 days with data ≥600 min/d during 14 consecutive days. A machine learning (ML) based method was used to classify the patterns of SB and sitting from raw 3D acceleration. The participants spent most (69.3%) of their waking time in SB, and a half (52.2%) of the SB was performed in a sitting posture. Men broke their overall sedentary time less often (4.1 vs. 6.1 bouts/h), but women sat more; however, women broke their sitting time as often as men (7.6 bouts/h). This study confirms that SB and sitting can be distinguished using ML methods, and more information about SB can be achieved when overall SB and sitting are analyzed separately in free-living conditions.  相似文献   

Sleep of professional athletes: Underexploited potential to improve health and performance   总被引：1，自引：1，他引：0  

Henri Tuomilehto  Ville-Pekka Vuorinen  Elina Penttilä  Marko Kivimäki  Markus Vuorenmaa  Mika Venojärvi 《Journal of sports sciences》2017,35(7):704-710

Sleep disorders have become increasingly prevalent affecting health and working ability. Restorative sleep may be considered important for athletes’ successful recovery and performance. However, some athletes seem to experience major problems in sleeping. Thus far, there is limited scientific information about their sleep. This study aimed to evaluate the quality of sleep and the prevalence of sleep disorders as well as the impact of a structured sleep counselling protocol in professional athletes. A total of 107 professional ice hockey players participated in the study. The exploratory observational 1-year follow-up study consisted of questionnaire-based sleep assessment followed by general sleep counselling and, when needed, polysomnography and an individual treatment plan. One in every four players was found to have a significant problem in sleeping. All athletes considered sleep essential for their health and three in every four players considered that counselling would improve their performance. Counselling and individual treatment were found to improve significantly the quality of sleep with the mean alteration of 0.6 (95% CI 0.2–1.0, P = 0.004) in a scale from 0 to 10. Our results support that sleep problems are common in professional athletes. However, systematic examination, counselling and individual treatment planning can improve the quality of their sleep.  相似文献   

Educational Technology and the Development of Education     

Henri Dieuzeide 《British journal of educational technology : journal of the Council for Educational Technology》1971,2(3):168-188

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The Closed Circuit Television System at the “Louis Lumiere” College of Secondary Education,Marly-le-Roi,France     

Henri Thevenet 《Educational Media International》2013,50(2):14-23

The planning and production of a photo-play as a group project involves the natural discipline of a technical job and the through exploration of the subject under study. At the same time it provides a logical conclusion and presentation which is its own record of achievement and a source of legitimate pride to its makers. The photo-play also forms an entertaining and valuable recapitulation of the study for the group and is an effective teaching aid for use with other groups, taking advantage of that curious capacity of children to give more concentrated attention to the work of their peers than their teachers.  相似文献   

Student perceptions of their autonomy at University     

D. C. Henri  L. J. Morrell  G. W. Scott 《Higher Education》2018,75(3):507-516

Learner autonomy is a primary learning outcome of Higher Education in many countries. However, empirical evaluation of how student autonomy progresses during undergraduate degrees is limited. We surveyed a total of 636 students’ self-perceived autonomy during a period of two academic years using the Autonomous Learning Scale. Our analysis suggests that students do not perceive themselves as being any more autonomous as they progress through University. Given the relativity of self-perception metrics, we suggest that our results evince a “red queen” effect. In essence, as course expectations increase with each year, each student’s self-perceived autonomy relative to their ideal remains constant; we term this the “moving goalpost” hypothesis. This article corroborates pedagogical literature suggesting that providing students with opportunities to act autonomously and develop confidence is key to developing graduates who have the independence that they need in order to be successful in the workplace.  相似文献   

SOCIOLOGICAL REFLECTIONS ON THE NATURE OF AND THE DEBATE ABOUT THE LINKS BETWEEN SECONDARY AND TERTIARY EDUCATION     

Henri Janne 《Higher Education in Europe》1987,12(2):20-32

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Network thermodynamics with entropy stripping     

Jean U. Thoma  Henri Atlan 《Journal of The Franklin Institute》1977,303(4):319-328

Thermodynamic systems with variable mass, like liquid/vapor equilibria and chemical reactions, are represented as networks having discrete elements and connections using bond graph symbols. The mass bond has special properties which are explained by entropy and volume stripping and indicate the reason why the derivative of the free enthalpy, not the internal energy, is the driving effort of chemical reactions. Chemical friction is represented by RS-fields that dissipate power which is different from the observed heat rate of chemical reactions. Different reticulations apply to reactions near and far from chemical equilibrium; their relation to experimental reaction kinetics and order of reaction is discussed.  相似文献   

La Sicile médiévale,terre de refuge pour les juifs: migration et exil     

Henri Bresc 《Al-Masaq: Islam & the Medieval Mediterranean》2005,17(1):31-46

La Sicile des derniers siècles du moyen âge est une terre d'immigration, d'asile à l'occasion, pour les juifs d'Afrique du nord, de Catalogne et de Provence. Ce statut de contrée de refuge est le fruit de la sécurité que la monarchie assure aux juifs, et qui est rarement brisée, mais l'économie latifondiaire assure aussi aux immigrants, placés d'abord «dans les pores de la production?», comme intermédiaires et artisans, puis dans la production agricole même, comme producteurs, de profiter des chances qu'offre ce véritable pays de Cocagne. Les flux d'immigration ont pour effet de renforcer l'arabisme des juifs siciliens, mais aussi de multiplier les influences culturelles et linguistiques et de faire du judaïsme sicilien un creuset du monde méditerranéen occidental.  相似文献   

Aviation and aeroplane motors     

Henri Petit 《Journal of The Franklin Institute》1910,170(4):291-302

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Critical genius     

Henri‐Frédéric Amiel 《Quarterly Journal of Speech》2013,99(1)

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