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141.
Andy J. King Jakob D. Jensen Nick Carcioppolo Melinda M. Krakow Ye Sun 《Mass Communication and Society》2013,16(6):753-775
Determining what factors predict media learning is an important avenue of research for the field of mass communication. The present study provides a comparative investigation of two models of media learning: the cognitive mediation model and the information utility model. Participants (N = 1,076) read a news article related to scientific discoveries relevant to cancer prevention and responded to all constructs of the two models. Recognition and comprehension were used to measure knowledge acquisition. Results generally support previous predictions of each model, though predicted variance remains small. In addition to testing the existing models, a modified cognitive mediation model using a key construct related to information utility—perceived relevance—was tested. The refined cognitive mediation model offered a more nuanced understanding of certain causal mechanisms but did not result in a meaningful change in predictive power of the model. Implications of the theoretical comparison and integration are discussed. 相似文献
142.
Leticia Camacho Andy Spackman David Cluff 《Journal of Business & Finance Librarianship》2013,18(2):114-124
Business librarians at Brigham Young University's Harold B. Lee Library are confronted with considerable and consistent declines in usage of print books in business and economic disciplines. Inspired by commercial businesses, where in-store displays are commonly used to increase sales, business librarians decided to highlight the library's business and economics collections by creating book displays. The study revealed that displays produced a substantial increase in circulation. Prior to the displays, featured books had an average usage of less than four times per year; after these books were featured in the displays, their usage per year increased by 58%. 相似文献
143.
Andy Lane 《Journal of sports sciences》2013,31(3):233-234
The dependence of power on aerobic and anaerobic energy metabolism and on force production was studied in maximal leg exercise. National and international level male rowers (n = 9) performed four modified (legs‐only) rowing ergometer exercises: a progressive test, 2‐min (T2), 12‐min (T12) and 6‐min (T6) all‐out tests. In T2, significant correlations were observed between power in T2 (PT2) and oxygen debt (r = 0.83, P<0.05) and between PT2 and average force production (Fav) during the last 30 s (r = 0.85, P<0.05). These parameters explained 93% of the variation in PT2. The highest correlations between power in T6 (PT6) and physiological parameters were as follows: maximal oxygen uptake (VO2 max: r = 0.87, P<0.01), blood bicarbonate concentration before the test ([HCO‐ 3before]: r=0.85, P<0.05) and blood lactate concentration on anaerobic threshold (BLanT: r= —0.82, P<0.05). Together, these parameters explained 92% of the variation in PT6. In T12, the total power (PT12) correlated with power of anaerobic threshold #OPPANT’. r = 0.95, P< 0.001) and with the highest VO2 value in this test (VO2 peak: r = 0.92, P<0.001). These two parameters explained 96% of the variation in PT12. The decrease of at least one of the force parameters during each test was taken as a sign of fatigue. The decline in force was compensated for by an increase in stroke rate at the end of T6 and T12 (P<0.01, P<0.001). Consequently, the power remained unchanged or even increased at the end of T6 and T12. The term ‘power endurance’ is introduced to describe the ability to resist and to compensate for local muscular fatigue. 相似文献
144.
Andy Smith 《Journal of sports sciences》2013,31(8):677-678
Although technology has now infiltrated and prompted evolution in most mass participation sports, the advances in bat technology in such sports as baseball and cricket have been relatively minor. In this study, we used a simple finite element modelling approach to try to shed new light upon the underlying mechanics of the bat-ball impact, with a view to the future optimization of bat design. The analysis of a flexible bat showed that the point of impact that produced the maximum post-impact ball velocity was a function of the bat's vibrational properties and was not necessarily at the centre of percussion. The details of the analysis agreed well with traditional Hertzian impact theory, and broadly with empirical data. An inspection of the relative modal contributions to the deformations during impact also showed that the position of the node of the first flexure mode was important. In conclusion, considerable importance should be attached to the bat's vibrational properties in future design and analysis. 相似文献
145.
Andy Marc Adrien Sedeaud Marion Guillaume Melissa Rizk Julien Schipman Juliana Antero-Jacquemin 《Journal of sports sciences》2013,31(6):524-532
AbstractAs opposed to many other track-and-field events, marathon performances still improve. We choose to better describe the reasons for such a progression. The 100 best marathon runners archived from January 1990 to December 2011 for men and from January 1996 to December 2011 for women were analysed. We determined the impact of historical, demographic, physiological, seasonal and environmental factors. Performances in marathons improve at every level of performance (deciles). In 2011, 94% of the 100 best men athletes were African runners; among women athletes they were 52%. Morphological indicators (stature, body mass and Body Mass Index (BMI)) have decreased. We show a parabolic function between BMI and running speed. The seasonal distribution has two peaks, in spring (weeks 14 to 17) and autumn (weeks 41 to 44). During both periods, the average temperature of the host cities varies close to optimal value for long distance race. African men and women runners are increasingly dominating the marathon and pushing its record, through optimal eco-physiological conditions. 相似文献
146.
Adrien Sedeaud Andy Marc Julien Schipman Karine Schaal Mario Danial Marion Guillaume 《Journal of sports sciences》2013,31(12):1146-1154
In a context of morphological expansion of the general population, how do athletes follow such a pattern of anthropometric growth? Is there any relation to performance? Biometric data including mass, height, body mass index (BMI) and age were collected for 50,376 American athletes representing 249,336 annual performers playing in professional baseball, football, ice hockey and basketball. Distributions by mass in National Football League (NFL) players are described by periods. Field goals have been studied in relation to players’ height in the National Basketball Association (NBA). Between 1871 and 2011, athletes from the four sports have increased significantly in mass, height and BMI, following a multi-exponential function series. Consequently, biometric differences between athletes and the general population are increasing gradually. Changes in the mass distribution within the NFL show the emergence of a biometrical specificity in relation to the field position. At the professional level, performance remains structured around precise biometric values. In the NBA, a height-attractor at 201.3 ± 6.3 cm for the best scorers is invariant, regardless of the level of play. These results suggest that laws of growth and biometrics drive high-level sport and organise performance around the specific constraint of each field position. Discrepancies between some mass and height developments question the (disproportionate) large mass increase (relative to the height increase) during the 1980s and 1990s. 相似文献
147.
The present study explores the relationship between students’ views of the nature of science (NOS) and their views of the nature of scientific measurement. A questionnaire with two‐tier diagnostic multiple‐choice items on both the NOS and measurement was administered to 179 first‐year physics students with diverse school experiences. Students’ views on the NOS were classified into four NOS ‘profiles’, and views on measurement were classified according to either the point or set paradigms. The findings show that students with a NOS profile dominated by a belief that the laws of nature are to be discovered by scientists are more likely to have a view of the nature of scientific measurement characterised by a belief in ‘true’ values. On the other hand, students who believe that scientific theories are inventions of scientists, constructed from observations that are then validated through further experimentation, are more likely to have a view of the nature of scientific measurement that is underpinned by the uncertain nature of scientific evidence. The implications for teaching scientific measurement at tertiary level are discussed. 相似文献
148.
Education and Social Cohesion: Recentering the Debate 总被引:1,自引:0,他引:1
Social capital theory has tended to treat social cohesion as a mere aggregation of individual and community-level characteristics, ignoring the long tradition of theory on social solidarity and social cohesion at the societal level. However, the key indicators of social capital-associational membership and social trust-do not covary cross-nationally, and societies rich in community-level social capital are not always cohesive societies. Social capital and societal cohesion are not necessarily the same thing, and education may have different effects on each. This article seeks to put the analysis of education and societal cohesion back in the center of the picture. We do this first through a critical review of some of the existing literature on education and social capital, which points to the limitations of individual-level analysis of what are fundamentally societal issues. Second, we outline some alternative models for understanding how education influences social cohesion in different societies, drawing on an analysis of some of the aggregated cross-national data on skills, income distribution, and various indicators of social cohesion. The argument suggests some causal mechanisms for the social impacts of education that are quite different from those that normally underpin arguments about human and social capital. 相似文献
149.
Leadership Succession 总被引:1,自引:1,他引:0
Andy Hargreaves 《The Educational forum》2013,77(2):163-173
One of the most significant events in the life of a school is a change in its leadership. Yet few things in education succeed less than leadership succession. Failure to care for leadership succession is sometimes a result of manipulation or self-centeredness; but more often it is oversight, neglect, or the pressures of crisis management that are to blame. 相似文献
150.
Childhood obesity and physical inactivity are serious threats to the health and wellness of our schoolchildren. Research has shown that play and physical activity are important in development, behaviour and academic achievement. Through the efforts of coordinated school health program and a Physical Education for Progress grant, a county school system in a southern state was able to construct multiple innovative playground systems at schools and combine them with various academic units in a cross-curricular effort to address the wellness needs of students. Exploratory research using pedometers, accelerometers and an observation method examined physical activity intensity levels during cross-curricular sessions. Results indicated that this type of physical activity might be a viable supplement to daily school-based physical activity needs. 相似文献