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61.
Ian Ruthven Mark BaillieLeif Azzopardi Ralf BierigEmma Nicol Simon SweeneyMurat Yaciki 《Information processing & management》2008
In this paper we investigate how information surrogates might be useful in exploratory search and what information it is useful for a surrogate to contain. By comparing assessments based on artificially created information surrogates, we investigate the effect of the source of information, the quality of an information source and the date of information upon the assessment process. We also investigate how varying levels of topical knowledge, assessor confidence and prior expectation affect the assessment of information surrogates. We show that both types of contextual information affect how the information surrogates are judged and what actions are performed as a result of the surrogates. 相似文献
62.
Ernst-Joachim Hossner Urs Schnyder Jürg Schmid Ralf Kredel 《Journal of sports sciences》2019,37(13):1481-1489
The present study aims to reveal the effects of positioning on decision-making performance in top-level refereeing in association football. To this end, for all 64 matches of the FIFA World Cup 2014, potential foul-play situations were videometrically analysed in terms of the referee’s position relative to the infringement. Contrary to earlier studies, viewing angles were analysed in addition to viewing distances and error rates were considered for not only falsely whistled but also falsely non-whistled events. Moreover, direct logistic regression analysis was applied to detect position-dependent differences. For the total of 1,527 potential foul play situations, an overall low error rate of 6.9% was found. The similar numbers of total whistle (n = 52) and non-whistle errors (n = 54) reflect referees’ ability to balance both types of errors. Regarding the overall viewing-distance effect, referees were 2.58 times (95% CI 1.47–4.54) more likely to commit a whistle error at 10–15 m and 5.51 times (95% CI 1.35–22.47) more likely to commit a non-whistle error at 0–5 m, corresponding to the position ranges occurring with the highest (10–15 m: 30.3%) and lowest (0–5 m: 5.8%) frequencies. In contrast, no significant effects of viewing-angle on decision-making accuracy could be revealed. 相似文献
63.
Markus Gerber Ralf Brand Franziska Antoniewicz Sandrine Isoard-Gautheur Henrik Gustafsson Renzo Bianchi 《Journal of sports sciences》2019,37(14):1673-1680
The development of cynical attitudes towards elite sport is a core symptom of athlete burnout and has been associated with dropout from elite sport. To date, this phenomenon has mainly been studied by investigating explicit attitudes towards sport, whereas athletes’ automatic evaluations (i.e. implicit attitudes) that have been shown to influence behavior as well were not considered. This study aimed to compare explicit and implicit attitudes towards sport of young elite athletes with high (N = 24) versus low (N = 26) burnout symptoms. Using self-reported measures, general and athlete burnout symptoms were assessed. Additionally, a single-target implicit association test was administered to examine participants’ automatic evaluation of sport. Statistical analysis revealed greater emotional/physical exhaustion and sport devaluation in athletes reporting high compared to low burnout symptoms. Implicit attitudes towards sport did not significantly differ between the groups. Furthermore, no significant correlations were observed between different athlete burnout symptoms and implicit attitudes. Athletes with high burnout symptoms show a tendency to explicitly detach themselves from sport, thus fostering sport devaluation as a core symptom of athlete burnout. However, this process does not seem to be reflected in their implicit attitudes towards sport. 相似文献
64.
Recently, there has been increasing criticism concerning academic computer science education. This paper presents a new approach based on the principles of constructivist learning design as well as the ideas of knowledge transfer in communities of practice. The course ‘High‐tech Entrepreneurship and New Media’ was introduced as an interdisciplinary project management lab in which students collaborate in groups to develop software solutions for authentic problems. Main goals were the tighter integration of university and local start‐up companies, an intense knowledge transfer on software engineering methods, as well as the implementation of constructivist learning principles in academic teaching. This paper presents the background and structure of the course as well as the results of a formative evaluation. While being successful in introducing a course based on digital‐media assisted, constructivist learning arrangements, establishing lasting communities of practice between university and industry is still an open issue. After discussing several reasons, the paper concludes with a list of general recommendations on how to improve the approach and its implementation. 相似文献
65.
66.
Cinema Demand In Germany 总被引:1,自引:0,他引:1
This paper examines the German cinema market using time series data covering the period 1950–2002. Applying estimation techniques such as OLS, 2SLS and SUR, we identify interrelations between the number of seats, the average real prices and the demand for movies per capita. Furthermore, we test for the long-run relationship between demand, prices and real income and estimate the elasticity of demand with respect to these variables.JEL–Classification: C22, C23, L82 相似文献
67.
68.
Rein De Cooman Sara De Gieter Roland Pepermans Cindy Du Bois Ralf Caers Marc Jegers 《International Journal for Educational and Vocational Guidance》2007,7(2):123-136
This article compares individuals already in teaching and non-teaching teacher graduates, and explores the motivation to pursue a teaching job based on job motives and work values. From the response of 241 recently graduated teachers it may be concluded that teachers consider intrinsic, altruistic and interpersonal features as strong job-specific motivators. Furthermore, teachers prefer altruistic and interpersonal work values, while non-teachers are more attracted by individualistic work values such as career opportunities and executive power. 相似文献
69.
Dejan Reljic Joachim Jost Kirsten Dickau Ralf Kinscherf Gabriel Bonaterra Birgit Friedmann-Bette 《Journal of sports sciences》2015,33(5):437-448
Dietary intake, vitamin status and oxidative stress were evaluated in 17 elite male boxers. Ten of them frequently reduced body weight rapidly before competitions (Weight Loss Group) and 7 did not practice rapid weight loss (Control Group). Food record checklists, blood samples for determination of vitamin status and plasma glutathione levels were obtained during a week of weight maintenance, a pre-competition week and a post-competition week. The average dietary intakes in both groups were 33 ± 8 kcal·kg?1, 3.7 ± 1.1 g·kg?1 carbohydrates, 1.5 ± 0.4 g·kg?1 protein, 1.2 ± 0.4 g·kg?1 fat and 2.2 ± 1.0 L water per day (excluding pre-competition week in Weight Loss Group). Energy (18 ± 7 kcal·kg?1), carbohydrate (2.2 ± 0.8 g·kg?1), protein (0.8 ± 0.4 g·kg?1), fat (0.6 ± 0.3 g·kg?1) and water (1.6 ± 0.6 L) consumption (P-values <0.001) and intakes of most vitamins (P-values < 0.05) were significantly reduced during the pre-competition week in the Weight Loss Group. In both groups, the intakes of vitamins A, E and folate were below recommended values throughout the three periods; however, blood vitamin and plasma glutathione levels did not change significantly. Our findings indicate a low-caloric and low-carbohydrate diet in elite boxers, regardless of participating in rapid weight loss or not. Apparently, the pre-competitional malnutitrition in the Weight Loss Group did not induce alterations in the vitamin and glutathione status. 相似文献
70.