Co-authorship networks and research impact: A social capital perspective   总被引：1，自引：0，他引：1  

Eldon Y. Li  Chien Hsiang Liao  Hsiuju Rebecca Yen 《Research Policy》2013

The impact of research work is related to a scholar's reputation and future promotions. Greater research impact not only inspires scholars to continue their research, but also increases the possibility of a larger research budget from sponsors. Given the importance of research impact, this study proposes that utilizing social capital embedded in a social structure is an effective way to achieve more research impact. The contribution of this study is to define six indicators of social capital (degree centrality, closeness centrality, betweenness centrality, prolific co-author count, team exploration, and publishing tenure) and investigate how these indicators interact and affect citations for publications. A total of 137 Information Systems scholars from the Social Science Citation Index database were selected to test the hypothesized relationships. The results show that betweenness centrality plays the most important role in taking advantage of non-redundant resources in a co-authorship network, thereby significantly affecting citations for publications. In addition, we found that prolific co-author count, team exploration, and publishing tenure all have indirect effects on citation count. Specifically, co-authoring with prolific scholars helps researchers develop centralities and, in turn, generate higher numbers of citations. Researchers with longer publishing tenure tend to have higher degree centrality. When they collaborate more with different scholars, they achieve more closeness and betweenness centralities, but risk being distrusted by prolific scholars and losing chances to co-author with them. Finally, implications of findings and recommendations for future research are discussed.  相似文献   

International Differences in Information Privacy Concerns: A Global Survey of Consumers     

Steven Bellman  Eric J. Johnson  Stephen J. Kobrin  Gerald L. Lohse 《The Information Society》2013,29(5):313-324

We examine three possible explanations for differences in Internet privacy concerns revealed by national regulation: (1) These differences reflect and are related to differences in cultural values described by other research; (2) these differences reflect differences in Internet experience; or (3) they reflect differences in the desires of political institutions without reflecting underlying differences in privacy preferences. Using a sample of Internet users from 38 countries matched against the Internet population of the United States, we find support for (1) and (2), suggesting the need for localized privacy policies. Privacy concerns decline with Internet experience. Controlling for experience, cultural values were associated with differences in privacy concerns. These cultural differences are mediated by regulatory differences, although new cultural differences emerge when differences in regulation are harmonized. Differences in regulation reflect but also shape country differences. Consumers in countries with sectoral regulation have less desire for more privacy regulation.  相似文献   

A Review of: “CyberAsia: The Internet and Society in Asia,edited by Zaheer Baber. Leiden,The Netherlands: Brill Academic Publishers, 2005. ix + 241 pp. US$77.00/EUR 59 (paper). ISBN 90 04 14625 3.”     

Helen Johnson 《The Information Society》2013,29(2):139-140

This article presents a scenario for a sustainable low carbon society with an emotionally healthy lifestyle in the year 2050. This scenario was developed on the basis of a survey of citizens, examination of science fiction and animation films, and consultations with experts and research teams. This analysis suggests that with a techno-ontological approach it would be possible to develop a low-carbon society in which advanced information and communication technology (ICT) and an emotionally healthy lifestyle are compatible.  相似文献   

Empire in Waves: A Political History of Surfing     

Rebecca Olive 《国际体育史杂志》2013,30(11-12):1494-1496

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Comparison of physiological responses to graded exercise test performance in outrigger canoeing     

Rebecca M. Kerr  Warwick Spinks  Anthony S. Leicht  Wade Sinclair  Louise Woodside 《Journal of sports sciences》2013,31(7):743-749

Abstract

The aim of this study was to establish a graded exercise test protocol for determining the peak physiological responses of female outrigger canoeists. Seventeen trained female outrigger canoeists completed two outrigger ergometer graded exercise test protocols in random order: (1) 25 W power output for 2 min increasing by 7.5 W every minute until exhaustion; and (2) 25 W power output for 2 min increasing by 15 W every 2 min to exhaustion. Heart rate and power output were recorded every 15 s. Expired air was collected continuously and sampled for analysis at 15-s intervals, while blood lactate concentration was measured immediately after and 3, 5, and 7 min after exercise. The peak physiological and performance variables examined included peak oxygen uptake ([Vdot]O_2peak), minute ventilation, tidal volume, ventilatory thresholds 1 and 2, respiratory rate, respiratory exchange ratio, heart rate, blood lactate concentration, power output, performance time, and time to [Vdot]O_2peak. There were no significant differences in peak physiological responses, ventilatory thresholds or performance variables between the two graded exercise test protocols. Despite no significant differences between protocols, due to the large limits of agreement evident between protocols for the peak physiological responses, it is recommended that the same protocol be used for all comparison testing to minimize intra-individual variability of results.  相似文献   

A novel scale to assess resistance-exercise effort     

Daniel A. Hackett  Nathan A. Johnson  Mark Halaki  Chin-Moi Chow 《Journal of sports sciences》2013,31(13):1405-1413

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Attentional Load and the Reproduction of Physical Work     

Donald Siegel  James Johnson  Greg Kline 《Research quarterly for exercise and sport》2013,84(2):146-152

Abstract

The effect of attentional focus on the perception of physical work was examined by using a work reproduction design. Subjects performed a fixed interval of work at either 50 or 75% of their predicted VO₂ max, during which they were required either to solve a continuous flow of arithmetic problems or to perform in an unfilled control condition. On a subsequent trial, without a concomitant attention-demanding task, subjects were asked to reproduce the amount of work that they had previously performed. It was found that individuals in the control condition produced a significantly greater amount of work on the reproduction trial, while those in the attentional focus condition performed about the same amount as on the previous trial. No interaction was found between attentional focus and work load.  相似文献   

Comparisons of physical characteristics and performances among female collegiate rowers     

Rebecca A. Battista  James M. Pivarnik  Gail M. Dummer  Norm Sauer  Robert M. Malina 《Journal of sports sciences》2013,31(6):651-657

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Effectiveness of the Slide and Cross-Over Steps In Volleyball Blocking—A Temporal Analysis     

Richard H. Cox  Larry Noble  Robert E. Johnson 《Research quarterly for exercise and sport》2013,84(2):101-107

Abstract

Three initial step techniques for moving laterally are commonly used by middle blockers in volleyball. These three methods are (1) the slide step, (2) the cross-over step, and (3) the jab cross-over step. The purpose of the current investigation was to study the relationship between the three initial step techniques and selected time variables involved in the jumping and blocking action. Four criterion measures were extracted from film footage (100 frames/sec) using cinematographic data collection techniques. Six skilled volleyball players were used as subjects (3 men and 3 women). A split-split plot 3 (step method) × 2 (response direction) × 2 (sex) factorial design, with repeated measures on method and direction, were used to analyze the criterion measures. Results of the analysis revealed a clear relationship between step method and three of the time variables studied. Specifically, the cross-over steps (and in particular the jab cross-over) were observed to be superior to the slide step in terms of getting the athlete's body off the ground and into a blocking position quickly. While earlier investigations demonstrated that the slide step was superior in terms of getting from a middle blocking position to a floor switch mat (stationary target) it seems clear from the present investigation that the jab cross-over is superior in terms of actual jumping and blocking efficiency.  相似文献   

Parenting and Child DRD4 Genotype Interact to Predict Children’s Early Emerging Effortful Control     

Heather J. Smith  Haroon I. Sheikh  Margaret W. Dyson  Thomas M. Olino  Rebecca S. Laptook  C. Emily Durbin  Elizabeth P. Hayden  Shiva M. Singh  Daniel N. Klein 《Child development》2012,83(6):1932-1944

Effortful control (EC), or the trait‐like capacity to regulate dominant responses, has important implications for children’s development. Although genetic factors and parenting likely influence EC, few studies have examined whether they interact to predict its development. This study examined whether the DRD4 exon III variable number tandem repeat polymorphism moderated the relation between parenting and children’s EC. Three hundred and eighty‐two 3‐year‐olds and primary caregivers completed behavioral tasks assessing children’s EC and parenting. Children’s DRD4 genotypes moderated the relation between parenting and EC: Children with at least one 7‐repeat allele displayed lower EC in the context of negative parenting than children without this allele. These findings suggest opportunities for modifying early risk for low EC.  相似文献