Is device-measured vigorous physical activity associated with health-related outcomes in children and adolescents? A systematic review and meta-analysis     

Antonio García-Hermoso  Yasmin Ezzatvar  Robinson Ramírez-Vlez  Jordi Olloquequi  Mikel Izquierdo 《运动与健康科学(英文)》2021,10(3):296

ObjectiveThis study sought to analyze the prospective association between vigorous-intensity physical activity (VPA) and health-related outcomes in children and adolescents.MethodsStudies reporting associations between device-measured VPA and health-related factors in children and adolescents aged 3–18 years were identified through database searches (MEDLINE, EMBASE, and SPORTDiscus). Correlation coefficients were pooled if outcomes were reported by at least 3 studies, using DerSimonian-Laird random effects models.ResultsData from 23 studies including 13,674 participants were pooled using random effects models. Significant associations were found between VPA at baseline and overall adiposity (r = −0.09, 95% confidence interval (95%CI): –0.15 to –0.03; p = 0.002; I² = 89.8%), cardiometabolic risk score (r = –0.13, 95%CI: –0.24 to –0.02, p = 0.020; I² = 69.6%), cardiorespiratory fitness (r = 0.25, 95%CI: 0.15−0.35; p < 0.001; I² = 57.2%), and total body bone mineral density (r = 0.16, 95%CI: 0.06 to 0.25; p = 0.001; I² = 0%).ConclusionVPA seems to be negatively related to adiposity and cardiometabolic risk score and positively related to cardiorespiratory fitness and total body bone mineral density among children and adolescents at follow-up. Therefore, our findings support the need to strengthen physical activity recommendations regarding VPA due to its health benefits in children and adolescents.  相似文献   

The Cognitive Neuroscience of the Teacher–Student Interaction     

Antonio M. Battro  Cecilia I. Calero  Andrea P. Goldin  Lisa Holper  Laura Pezzatti  Diego E. Shalóm  Mariano Sigman 《Mind, Brain, and Education》2013,7(3):177-181

Pedagogy is the science and art of teaching. Each generation needs to explore the history, theory, and practice of the teacher–student interaction. Here we pave the path to develop a science that explores the cognitive and physiological processes involved in the human capacity to communicate knowledge through teaching. We review examples from our previous work in this research area and discuss a path to reveal the cognitive and cerebral mechanisms by which we teach, unfolding a complex operation such as teaching in its constituents and components.  相似文献   

Proposal for Adapting the Cataloging of Bindings to the MARC Format     

Antonio Carpallo Bautista  Yohana Yessica Flores Hernández  Adelina Clausó García 《Cataloging & classification quarterly》2013,51(5-6):530-552

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General Works on Mass Communications     

Russel B. Nye  Otto Friedrich  Jerry Della Femina 《Communication Booknotes Quarterly》2013,44(2):4-5

Russel B. Nye's The Unembarrassed Muse: The Popular Arts in America (Dial Press, $12.50)

Otto Friedrich's Decline and Fall (Harpor & Row, $10.00)

“The Sociology of Mass Media Communicators,” The Sociological Review Monograph No. 13 (University of Keele, Staffordshire, England, January 1969, $4.60 including air mail costs)

Audio Visual Marketplace: A Multimedia Guide (Bowker, $12.25)

Jerry Della Femina's From Those Wonderful Folks Who Gave You Pearl Harbor (Simon and Schuster, $6.50)  相似文献   

International Intelligence in Spain: An Approach to Information Resources for Business     

Antonio Muñoz-Cañavate 《Journal of Business & Finance Librarianship》2013,18(4):302-317

The concept of international intelligence has taken on a greater importance for companies seeking to internationalize and access foreign markets. An exhaustive environmental scan—including international competitors, suppliers, clients in target countries, legislation and the political situation in other territories, and others—involves gathering the necessary information, its analysis and subsequent dissemination, and decision making. Within the context of the important role to be played by information management professionals who are specialized in foreign information, this article describes the information resources that Spanish companies have available to them that can assist them as they enter foreign markets.  相似文献   

The Impact of Corporate Media News on Market Valuation     

Beatriz Cuellar-Fernández  Yolanda Fuertes-Callén  José Antonio Laínez-Gadea 《Journal of Media Economics》2013,26(2):90-110

This article explores the influence of Web-based corporate reporting on the investors' valuation of companies in the information and communications technology industry. This study compiled 8,111 news items issued in the “Press Releases” tab of the firms' Web sites between January 2003 and April 2005, and analyzed what type of news items affects stock returns. The results show a positive price reaction to news regarding new customers, completion of acquisitions, strategic long-term decisions, and non-technological alliances. In contrast, the results show a negative price reaction to news regarding the launch of new or upgraded products.  相似文献   

An annual JCR impact factor calculation based on Bayesian credibility formulas     

Patricia Pérez-Hornero  José Pablo Arias-Nicolás  Antonio A. Pulgarín  Antonio Pulgarín 《Journal of Informetrics》2013,7(1):1-9

Our aim deals with appraising the annual impact calculation of journals belonging to the JCR, in terms of the expected citation (with or without selfcitations) by published paper in a range of k-years. A Bayesian approach to the problem, should reflect not only the current prestige of a journal, but also taking into account its recent trajectory. In this wide context, credibility theory becomes an adequate mechanism deciding whether journal's impact factor calculation to be more or less plausible. Under prior belief that journal quality is determined by its impact factor, we model the citation-quality process by choosing a conjugated family of the exponential class in order to obtain a net impact credibility formula. Proposed weighting schema produces the effect of smoothing out any sudden increases or decreases in the year-by-year impact factor.  相似文献   

Implicit indexing of natural language text by reorganizing bytecodes     

Nieves R. Brisaboa  Antonio Fari?a  Susana Ladra  Gonzalo Navarro 《Information Retrieval》2012,15(6):527-557

Word-based byte-oriented compression has succeeded on large natural language text databases, by providing competitive compression ratios, fast random access, and direct sequential searching. We show that by just rearranging the target symbols of the compressed text into a tree-shaped structure, and using negligible additional space, we obtain a new implicitly indexed representation of the compressed text, where search times are drastically improved. The occurrences of a word can be listed directly, without any text scanning, and in general any inverted-index-like capability, such as efficient phrase searches, can be emulated without storing any inverted list information. We experimentally show that our proposal performs not only much more efficiently than sequential searches over compressed text, but also than explicit inverted indexes and other types of indexes, when using little extra space. Our representation is especially successful when searching for single words and short phrases.  相似文献   

International trends in health science librarianship: Part 4 – Four Southern European countries     

Evagelia Lappa  Artemis Chaleplioglou  Gaetana Cognetti  Maurella Della Seta  Federica Napolitani Cheyne  Veronica Juan‐Quilis  Laura Muñoz‐Gonzalez  Sílvia Lopes 《Health information and libraries journal》2012,29(4):338-343

This is the fourth in a series of articles exploring international trends in health science librarianship in four Southern European countries in the first decade of the 21st century. The invited authors are from Greece, Italy, Spain and Portugal. Future issues will track trends in Latin America and Central Europe. JM  相似文献   

Preservation of relevant properties of interconnected dynamical systems over complex networks     

Guillermo Fernández-Anaya  Eric Campos-Cantón  Sergej Čelikovský  Antonio Loria 《Journal of The Franklin Institute》2013,350(10):2849-2852

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