Validation of two accelerometers to determine mechanical loading of physical activities in children     

Ursina Meyer  Dominique Ernst  Silvia Schott  Claudia Riera  Jan Hattendorf  Jacqueline Romkes 《Journal of sports sciences》2015,33(16):1702-1709

The purpose of this study was to assess the validity of accelerometers using force plates (i.e., ground reaction force (GRF)) during the performance of different tasks of daily physical activity in children. Thirteen children (10.1 (range 5.4–15.7) years, 3 girls) wore two accelerometers (ActiGraph GT3X+ (ACT), GENEA (GEN)) at the hip that provide raw acceleration signals at 100 Hz. Participants completed different tasks (walking, jogging, running, landings from boxes of different height, rope skipping, dancing) on a force plate. GRF was collected for one step per trial (10 trials) for ambulatory movements and for all landings (10 trials), rope skips and dance procedures. Accelerometer outputs as peak loading (g) per activity were averaged. ANOVA, correlation analyses and Bland–Altman plots were computed to determine validity of accelerometers using GRF. There was a main effect of task with increasing acceleration values in tasks with increasing locomotion speed and landing height (P < 0.001). Data from ACT and GEN correlated with GRF (r = 0.90 and 0.89, respectively) and between each other (r = 0.98), but both accelerometers consistently overestimated GRF. The new generation of accelerometer models that allow raw signal detection are reasonably accurate to measure impact loading of bone in children, although they systematically overestimate GRF.  相似文献   

Foreign-born Counselor Educators: Strengths,Challenges, and Areas of Support     

Interiano-Shiverdecker  Claudia G.  Prasath  Priscilla Rose  Eren  Ravza Nur Aksoy 《International journal for the advancement of counseling》2022,44(1):126-144

International Journal for the Advancement of Counselling - This article features strengths and challenges indicated by foreign-born counselor educators in programs accredited by the Council for...  相似文献   

A Content Analysis of Sex Trafficking Instruments     

Interiano-Shiverdecker  Claudia G.  Romero  Devon E.  Anderson  Aneesa  Castellon  Nancy E. 《International journal for the advancement of counseling》2022,44(3):373-394

International Journal for the Advancement of Counselling - This content analysis examined assessments available for the screening of sex trafficking to provide professional counselors further...  相似文献   

Associations between morphological awareness and literacy skills in German primary school children: the roles of grade level,phonological processing and vocabulary     

Haase  Astrid  Steinbrink  Claudia 《Reading and writing》2022,35(7):1675-1709

Reading and Writing - Studies investigating relations between morphological awareness and literacy in German, a language with a rather transparent but asymmetric orthography, are sparse. Little is...  相似文献   

Whose university is it,anyway? Power and privilege on gendered terrain,edited by Anne Wagner,Sandra Acker and Kimine Myuzumi     

Claudia Gillberg 《Gender and education》2010,22(1):132-134

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Starke Mädchen — Schöne Frauen     

Claudia Kugelmann  Katharina Liebsch 《Sportwissenschaft》1997,27(2):202-203

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Abusive head trauma at a tertiary care children's hospital in Mexico City. A preliminary study     

Díaz-Olavarrieta C  García-Piña CA  Loredo-Abdala A  Paz F  Garcia SG  Schilmann A 《Child abuse & neglect》2011,35(11):915-923

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When the Stars Aligned: Radio and Histories of Media Convergence     

Claudia Calhoun 《Journal of Radio & Audio Media》2019,26(1):147-152

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Design and environmental technologies: Does ‘green-matching’ actually help?     

Claudia Ghisetti  Sandro Montresor  Antonio Vezzani 《Research Policy》2021,50(5):104208

This paper investigates whether a green kind of design helps firms increase their capabilities for inventing in the environmental domain and whether it does so more than ‘standard’ design. It also investigates whether the effect of ‘green-matching’ between new design and technologies is conditional on firms’ innovative capabilities, as reflected by their R&D expenditure. We address these research questions with respect to the world's top R&D investors, looking at their intellectual property rights at the United States Patent and Trademark Office (USPTO) and proposing an original textual identification of green designs and trademarks. We find that green design increases environmental inventions by top R&D investors, and to a greater extent than non-environmental ones. Standard design also stimulates environmental inventions, but to a lesser extent than green design. The ‘green-matching’ actually helps, but internal innovative capabilities are required to make it effective: a green-tech ‘prize’ emerges from green design, but only once a minimum threshold of R&D expenditure has been reached.  相似文献   

Errors of programming and ownership of the robot concept made by trainee kindergarten teachers during an induction training     

Seckel  María José  Vásquez  Claudia  Samuel  Marjorie  Breda  Adriana 《Education and Information Technologies》2022,27(3):2955-2975

Education and Information Technologies - Computational thinking in the educational environment has awaken a rising interest, having been included as part of the curricula from the very beginnings...  相似文献