Empowering teams through social network ties     

Xuepan Zhong  Qian Huang  Robert M. Davison  Xuan Yang  Huaping Chen 《International Journal of Information Management》2012

Effective teamwork and knowledge coordination are becoming increasingly important for all kinds of organizations given the growing use of teams to tackle competitive challenges and sustain competitive advantage. In this study, we develop and validate a model of how two types of social network ties – expressive and instrumental – contribute to team efficacy and performance, mediated by three dimensions of a transactive memory system (TMS) – specialization, credibility and coordination within teams. We test the model in an empirical study drawing on data from 66 teams in a variety of organizations. The results suggest that both instrumental and expressive ties within teams can facilitate the formation of TMS and the three dimensions of TMS are all, even though to different extents, positively related to team efficacy. Team efficacy is also a powerful predictor of team performance. The findings in our study bridge the literature gap about social networks and TMS and explain the underlying process and mechanisms by which social network ties exert their influence on team outcomes. The results have implications for organizations that wish to leverage teams to take advantage of team members’ differentiated expertise and coordinate their work more effectively and efficiently.  相似文献   

Exercise training and impaired glucose tolerance in obese humans     

McNeilly AM  McClean C  Murphy M  McEneny J  Trinick T  Burke G  Duly E  McLaughlin J  Davison G 《Journal of sports sciences》2012,30(8):725-732

Individuals with impaired glucose tolerance (IGT) are at greater risk of developing diabetes than in normoglycaemia. The aim of this study was to examine the effects of 12-weeks exercise training in obese humans with IGT. Eleven participants (6 males and 5 females; 49±9 years; mean Body Mass Index (BMI) 32.4 kg · m(-2)), completed a 12-week brisk walking intervention (30 min per day, five days a week (d · wk(-1)), at 65% of age-predicted maximal heart rate (HR(max)). Anthropometric measurements, dietary intake, pulse wave velocity (PWV, to determine arterial stiffness) and blood pressure (BP) were examined at baseline and post intervention. Fasting blood glucose, glycosylated haemoglobin, insulin, blood lipids, indices of oxidative stress and inflammation (lipid hydroperoxides; superoxide dismutase; multimeric adiponectin concentration and high-sensitivity C-reactive protein) were also determined. Post intervention, PWV (9.08±1.27 m · s(-1) vs. 8.39±1.21 m · s(-1)), systolic BP (145.4±14.5 vs. 135.8±14.9 mmHg), triglycerides (1.52±0.53 mmol · L(-1) vs. 1.31±0.54 mmol · L(-1)), lipid hydroperoxides (1.20±0.47 μM · L(-1) vs. 0.79±0.32 μM · L(-1)) and anthropometric measures decreased significantly (P < 0.05). Moderate intensity exercise training improves upper limb vascular function in obese humans with IGT, possibly by improving triglyceride metabolism, which may subsequently reduce oxidative stress. These changes were independent of multimeric adiponectin modification and alterations in other blood biomarkers.  相似文献   

Computing in a Design Curriculum     

J. Davison  W. Hills 《European Journal of Engineering Education》1978,3(3-4):253-261

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News in Brief from Asia     

Peter Davison 《Learned Publishing》1998,11(4):300-300

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Two followup studies of former educable mentally retarded students from the Kansas Work-Study Project     

J D Chaffin  C R Spellman  C E Regan  R Davison 《Exceptional children》1971,37(10):733-738

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Neuromuscular characteristics of endurance- and power-trained athletes     

Koceja DM  Davison E  Robertson CT 《Research quarterly for exercise and sport》2004,75(1):23-30

In response to chronic physical training, the human neuromuscular system undergoes significant and specific adaptations. More importantly, these influences are the result of the type and quantity of physical activity. One of the simplest neuromuscular mechanisms is the spinal stretch reflex. The reflex system was previously viewed as inflexible, with a relatively fixed response that could vary only slightly. However, more recent data have identified an adaptive plasticity in the reflex system. In this respect, the reflex system can be used to assess training and aging adaptations of the human neuromuscular system. Due to their methodological simplicity, both the tendon-tap reflex and the electrically evoked Hoffmann reflex (H-reflex) can be used to assess training adaptations of the human neuromuscular system. The purpose of this paper is to review briefly the tendon-tap and H-reflex paradigms and delineate the research findings pertaining to changes in the reflex system with physical training. For purposes of clarity, this discussion will be divided into the following: (a) differences observed in the tendon-tap reflex, (b) differences observed in the H-reflex, and (c) role of interneurons in mediating these changes.  相似文献   

Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists   总被引：3，自引：0，他引：3  

Santalla A  Pérez M  Montilla M  Vicente L  Davison R  Earnest C  Lucía A 《Journal of sports sciences》2003,21(1):39-47

We examined the effects of pre-exercise sodium bicarbonate (NaHCO3) ingestion on the slow component of oxygen uptake (VO2) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHCO3 (0.3 g x kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74.7 +/- 5.9 ml x kg(-1) x min(-1); mean +/- s) performed two bouts of 6 min duration at an intensity of 90% VO2max interspersed by 8 min of active recovery. Gas exchange and blood data (pH, blood lactate concentration and [HCO3-]) were collected during the tests. In both bouts, the slow component of VO2 was defined as the difference between end-exercise VO2 and the VO2 at the end of the third minute. No significant difference was found in the slow component of VO2 between conditions in the first (NaHCO3, 210 +/- 69 ml; placebo, 239 +/- 105 ml) or second trial (NaHCO3, 123 +/- 88 ml; placebo, 197 +/- 101 ml). In conclusion, pre-exercise NaHCO3 ingestion did not significantly attenuate the VO2 slow component of professional road cyclists during high-intensity exercise.  相似文献   

Neural ranking models for document retrieval     

Trabelsi  Mohamed  Chen  Zhiyu  Davison  Brian D.  Heflin  Jeff 《Information Retrieval》2021,24(6):400-444

Information Retrieval Journal - Ranking models are the main components of information retrieval systems. Several approaches to ranking are based on traditional machine learning algorithms using a...  相似文献   

Establishing documentary production support for 21st century campuses     

Elizabeth L. Davison  Thomas S. Hansell 《Education and Information Technologies》2014,19(1):227-237

As a response to the growing trend of academic assignments that involve some type of video production, this paper advocates that campuses need to provide instructional as well as technical support for such projects. Universities invest in writing centers to help cultivate writing skills because they understand that providing the latest word processing programs doesn’t ensure students become better writers. Similarly, students with flip/cell video cameras and editing software are not likely to produce quality projects without guidance and thus need a similar network of support for these 21st century forms of communication. This paper presents a model for offering documentary services to entire campus communities - including technology, technique, and pedagogical considerations that lead to educational film productions with strong academic content and integrity.  相似文献   

‘I will do it but religion is a very personal thing’: teacher education applicants’ attitudes towards teaching religion in Ireland     

Manuela Heinz  Kevin Davison  Elaine Keane 《欧洲师范教育杂志》2018,41(2):232-245

There has been extensive research internationally describing teachers’ homogenous socio-demographic backgrounds and critiquing the associated equity and diversity issues, most especially with regard to ethnicity and gender, and to a lesser extent, social class and disability. Yet, teachers’ religious affiliations and/or convictions have rarely been explored. Since 96% of state primary schools in Ireland are denominational, considering religious diversity in teaching is both critically important and a complex undertaking. This paper examines primary initial teacher education (ITE) applicants’ religiosity, and views of teaching religion, in Ireland. Our data suggest low levels of religious practice and religiosity among ITE applicants, many of whom would prefer to teach religion using a non-confessional approach. The paper raises critical questions regarding the experiences, constitutional rights and professional practice of increasingly secular and/or non-practicing Catholic teacher cohorts in a predominantly Catholic primary education system that has survived the trend towards progressive ‘unchurching’ of Europe.  相似文献