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We compared SenseWear Armband versions (v) 2.2 and 5.2 for estimating energy expenditure in healthy adults. Thirty-four adults (26 women), 30.1 ± 8.7 years old, performed two trials that included light-, moderate- and vigorous-intensity activities: (1) structured routine: seven activities performed for 8-min each, with 4-min of rest between activities; (2) semi-structured routine: 12 activities performed for 5-min each, with no rest between activities. Energy expenditure was measured by indirect calorimetry and predicted using SenseWear v2.2 and v5.2. Compared to indirect calorimetry (297.8 ± 54.2 kcal), the total energy expenditure was overestimated (P < 0.05) by both SenseWear v2.2 (355.6 ± 64.3 kcal) and v5.2 (342.6 ± 63.8 kcal) during the structured routine. During the semi-structured routine, the total energy expenditure for SenseWear v5.2 (275.2 ± 63.0 kcal) was not different than indirect calorimetry (262.8 ± 52.9 kcal), and both were lower (P < 0.05) than v2.2 (312.2 ± 74.5 kcal). The average mean absolute per cent error was lower for the SenseWear v5.2 than for v2.2 (P < 0.001). SenseWear v5.2 improved energy expenditure estimation for some activities (sweeping, loading/unloading boxes, walking), but produced larger errors for others (cycling, rowing). Although both algorithms overestimated energy expenditure as well as time spent in moderate-intensity physical activity (P < 0.05), v5.2 offered better estimates than v2.2.  相似文献   
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ABSTRACT:  It has been reported that students learn best when they use a wide variety of techniques to understand the information of the discipline, be it visual, auditory, discussion with others, metacognition, hands-on activities, or writing about the subject. We report in this article the use of academic journals not only as an aid for students to learn about content knowledge needed in an Experimental Foods course, but also as a way to have students think about and reflect on their own personal values. The topics of these journal entries cover several of the core competencies in the Institute of Food Technologists (IFT) Undergraduate Education Standards for Degrees in Food Science. These are basic principles of food science, as well as address several "Success Skills" (written communication, critical thinking, professionalism, life-long learning, interaction skills, and organizational skills). While there are no quantitative "measurements" of gains in learning, comments from the students indicate that learning took place, critical reasoning occurred, and personal values were analyzed. A guideline for writing and grading academic journals and a simple rubric for scoring the quality of the writing are included.  相似文献   
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Abstract

This article reviews the application of the Industrial Organization (10) framework of Structure‐Conduct‐Performance (S‐C‐P) in media market research. The constructs and premises of this economic model are restated, and the orthodox economic notions of market performance and the logic that underlies the model are clarified. Alongside these elucidations, this article discusses common conceptualizations and interpretations found in media market studies. Media issues such as content diversity and media concentration, which are often studied through the S‐C‐P approach, are also re‐examined. These deliberations are intended to contribute toward a more consistent framework for the study of media industries and markets.  相似文献   
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A range of cross-sectional models are estimated with a view to establishing the factors that determine the valuation of professional athletes in a highly-specialised sport, with an application to cricket's Indian Premier League (IPL). We distinguish between personal characteristic and playing ability factors, and with respect to the former, between ability in different forms of the sport. We find a number of interpretable variables that have explanatory power over auction values, while decomposition according to batting and bowling specialisations produces very different results depending on the use of either Test or One-Day International (ODI) variables. There is also possible evidence of inefficient bidding, insomuch that overbidding was somewhat correlated with players with higher realised values.  相似文献   
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