Game location and aggression in rugby league     

Jones MV  Bray SR  Olivier S 《Journal of sports sciences》2005,23(4):387-393

The present study examined the relationship between aggression and game location in rugby league. We videotaped a random sample of 21 professional rugby league games played in the 2000 Super League season. Trained observers recorded the frequency of aggressive behaviours. Consistent with previous research, which used territoriality theories as a basis for prediction, we hypothesized that the home team would behave more aggressively than the away team. The results showed no significant difference in the frequency of aggressive behaviours exhibited by the home and away teams. However, the away teams engaged in substantially more aggressive behaviours in games they lost compared with games they won. No significant differences in the pattern of aggressive behaviours for home and away teams emerged as a function of game time (i.e. first or second half) or game situation (i.e. when teams were winning, losing or drawing). The findings suggest that while home and away teams do not display different levels of aggression, the cost of behaving aggressively (in terms of game outcome) may be greater for the away team.  相似文献   

A single session of resistance exercise does not reduce postprandial lipaemia     

Burns SF  Corrie H  Holder E  Nightingale T  Stensel DJ 《Journal of sports sciences》2005,23(3):251-260

This study investigated the effect of a single session of resistance exercise on postprandial lipaemia. Eleven healthy normolipidaemic men with a mean age of 23 (standard error = 1.4) years performed two trials at least 1 week apart in a counterbalanced randomized design. In each trial, participants consumed a test meal (1.2 g fat, 1.1 g carbohydrate, 0.2 g protein and 68 kJ x kg(-1) body mass) between 08.00 and 09.00 h following a 12 h fast. The afternoon before one trial, the participants performed an 88 min bout of resistance exercise. Before the other trial, the participants were inactive (control trial). Resistance exercise was performed using free weights and included four sets of 10 repetitions of each of 11 exercises. Sets were performed at 80% of 10-repetition maximum with a 2 min work and rest interval. Venous blood samples were obtained in the fasted state and at intervals for 6 h postprandially. Fasting plasma triacylglycerol (TAG) concentration did not differ significantly between control (1.03 +/- 0.13 mmol x l(-1)) and exercise (0.94 +/- 0.09 mmol x l(-1)) trials (mean +/- standard error). Similarly, the 6 h total area under the plasma TAG concentration versus time curve did not differ significantly between the control (9.84 +/- 1.40 mmol l(-1) x 6 h(-1)) and exercise (9.38 +/- 1.12 mmol x l(-1) x 6 h(-1)) trials. These findings suggest that a single session of resistance exercise does not reduce postprandial lipaemia.  相似文献   

The dubious promise of postsecondary vocational education: Its payoff to dropouts and graduates in the U.S.A.     

Wellford W Wilms  Stephen Hansell 《International Journal of Educational Development》1982,2(1):43-59

The longitudinal study described in this report investigated the effects of postsecondary public and proprietary school vocational training on students' subsequent job success in the United States. The study surveyed dropouts and graduates from public and proprietary schools in six vocational programs in four major cities, and compared their personal characteristics, job placement and earnings. Results showed that, compared with graduates, dropouts were more frequently males who were black, older, of lower socioeconomic status, and more likely from public programs. Also, few students who studied for upper status jobs (accountant, computer programmer, and electronic technician) got those jobs, regardless of whether they had graduated from or dropped out of their vocational programs. On the other hand, the majority of students who studied for lower-status jobs, in which women typically predominate, (secretary, dental assistant and cosmetologist) successfully found those jobs. Further, graduates fared significantly better in job placement than dropouts. Finally, persistence in, and graduation from a program (persistence and graduation) were unrelated to students' first earnings. However, students in lower-status occupations had higher later earnings if they completed their programs. These results suggest that vocational training, which may be done more efficiently in proprietary than public schools, enhances placement and later earnings only in lower-status jobs.  相似文献   

Guardians of science,fairness and reliability of peer review by H.-D. Daniel Weinheim: VCH 1993. 118 pp. hdbk. ISBN 3–527–29041–9     

Stephen Neidle 《Learned Publishing》1994,7(3):207-207

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Education with production — learning from the third world     

David Knox  Stephen Castles 《International Journal of Educational Development》1982,2(1):1-14

Flexible, self-organised work groups will become increasingly important in rich countries like the U.S. as employment in the formal economic system continues to decline. Educational models and methods based on the linking of learning with productive work developed in Third World countries can give a valuable stimulus to educational innovation in those industrialized countries hardest hit by the current crisis.Education with production will be important in equipping people for the new situation. The article discusses examples of several types of education with production. Among issues raised are: what skills are needed; what sorts of people the different types of post-school education with production cater for; how to extend the benefits of self-organised work; some important factors in introducing education with production at school level, including demands on the teacher and relevance to pupils' needs. The role of the Foundation for Education with Production is briefly described.  相似文献   

The effect of acute aerobic exercise on central arterial stiffness,wave reflections,and hemodynamics in adults with diabetes: A randomized cross-over design     

Kimberley L. Way  Angela S. Lee  Stephen M. Twigg  Nathan A. Johnson 《运动与健康科学(英文)》2021,10(4):499

BackgroundIndividuals with diabetes have greater central arterial stiffness, wave reflections, and hemodynamics, all of which promote the accelerated cardiovascular pathology seen in this population. Acute aerobic exercise has been shown to be an effective strategy for reducing central arterial stiffness, wave reflections, and hemodynamics in healthy individuals; however, the effects of acute aerobic exercise in reducing these outcomes is not well established in people with diabetes. Recently, implementation of high-intensity interval exercise (HIIE) has shown superior improvements in cardiovascular health outcomes when compared to traditional aerobic exercise. Yet, the effect of HIIE on the aforementioned outcomes in people with diabetes is not known. The purpose of this study was to (i) describe the central arterial stiffness, wave reflections, and hemodynamic responses to a bout of HIIE and moderate-intensity continuous exercise (MICE) in adults with diabetes; and (ii) compare the effects of HIIE and MICE on the aforementioned outcomes.MethodsA total of 24 adult men and women (aged 29–59 years old) with type 1 (n = 12) and type 2 (n = 12) diabetes participated in a randomized cross-over study. All participants completed the following protocols: (i) HIIE: cycling for 4 × 4 min at 85%–95% of heart rate peak (HR_peak), interspersed with 3 min of active recovery at 60%–70%HR_peak; (ii) MICE: 33 min of continuous cycling at 60%–70%HR_peak; and (iii) control (CON): lying quietly in a supine position for 30 min.ResultsA significant group × time effect was found for changes in central systolic blood pressure (F = 3.20, p = 0.01) with a transient reduction for the HIIE group but not for the MICE or CON groups. There was a significant group × time effect for changes in augmentation index at a heart rate of 75 beats/min (F = 2.32, p = 0.04) with a decrease following for HIIE and MICE but not for CON. For all other measures of central arterial stiffness and hemodynamics, no significant changes were observed (p > 0.05).ConclusionA bout of HIIE appears to lead to a greater transient reduction in central systolic blood pressure than the reduction observed following MICE; however, both HIIE and MICE improved augmentation index at a heart rate of 75 beats/min in people with diabetes. There was no significant difference in response to HIIE and MICE in all outcomes. This provides preliminary evidence on the role of HIIE on such outcomes in people with diabetes.  相似文献   

Rocky IV,Rambo II,and the Place of the Individual in Modern American Society     

Stephen C. LeSueur  Dean Rehberger 《Journal of American culture (Malden, Mass. : 2003)》1988,11(2):25-33

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From knowledge to added value: A comparative, panel-data analysis of the innovation value chain in Irish and Swiss manufacturing firms     

Stephen Roper  Spyros Arvanitis 《Research Policy》2012,41(6):1093-1106

The innovation value chain (IVC) divides the innovation process into three separate links or activities: knowledge gathering, knowledge transformation and knowledge exploitation. Here, we report a comparative panel data analysis of the IVC in Ireland and Switzerland. Both economies are small, very open and depend significantly on innovation to maintain competitive advantage. In recent years, however, R&D and innovation growth in Ireland has been markedly stronger than that in Switzerland. We investigate these differences through the ‘lens’ of the IVC. Significant similarities exist between some aspects of firms’ innovation behaviour in each country: strong complementarities emerge between external knowledge sources and between firms’ internal and external knowledge. And, in both countries, in-house R&D and links to customers prove important drivers of innovation. Innovation drives productivity growth in different ways in the two countries, however, through product change in Switzerland and through process change in Ireland. Other differences in the determinants of innovation performance linked to ownership and firms’ institutional context emphasise the systemic nature of innovation and the legacy of past patterns of industrial development.  相似文献   

Is there a link between hearing aid use, employment, and income?     

Winn S 《American annals of the deaf》2006,151(4):434-440

This paper examines hearing aid use by 60 congenitally deaf individuals who attended special education units in South Australia. The study indicates that only one-third to half of deaf adults wore their hearing aids in social situations for speech detection. Just over one-third (n = 22) of the deaf adults involved in this study wore their hearing aids at work and less than half (n = 27) wore their hearing aids at home. Younger deaf adults were more likely to wear their hearing aids in the home than older deaf adults. Younger deaf adults tended to wear their hearing aids more frequently when they were at school if they had perceived their teachers had a positive attitude to deafness. This study found that there was no statistically significant relationship between wearing hearing aids and employment status. There was also no statistically significant difference in hearing aid use between men and women. The low use of hearing aids could be attributed at least in part to the current Australian policy regarding supply and servicing of hearing aids to congenitally deaf individuals which ceases to be free after the individual reaches 21 years of age.  相似文献   

Attention and salience in associative blocking     

Denton SE  Kruschke JK 《Learning & behavior》2006,34(3):285-304

The associative learning effect called blocking has previously been found in many cue-competition paradigms where all cues are of equal salience. Previous research by Hall, Mackintosh, Goodall, and dal Martello (1977) found that, in animals, salient cues were less likely to be blocked. Crucially, they also found that when the to-be-blocked cue was highly salient, the blocking cue would lose some control over responding. The present article extends these findings to humans and suggests that shifts in attention can explain the apparent loss of control by the previously learned cue. A connectionist model that implements attentional learning is shown to fit the main trends in the data. Model comparisons suggest that mere forgetting, implemented as weight decay, cannot explain the results.  相似文献