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101.
This paper treats document–document similarity approaches in the context of science mapping. Five approaches, involving nine methods, are compared experimentally. We compare text-based approaches, the citation-based bibliographic coupling approach, and approaches that combine text-based approaches and bibliographic coupling. Forty-three articles, published in the journal Information Retrieval, are used as test documents. We investigate how well the approaches agree with a ground truth subject classification of the test documents, when the complete linkage method is used, and under two types of similarities, first-order and second-order. The results show that it is possible to achieve a very good approximation of the classification by means of automatic grouping of articles. One text-only method and one combination method, under second-order similarities in both cases, give rise to cluster solutions that to a large extent agree with the classification. 相似文献
102.
Nilsson J Tveit P Eikrehagen O 《Sports biomechanics / International Society of Biomechanics in Sports》2004,3(1):85-107
The purpose was to study the adaptation to speed in the temporal patterns of the movement cycle and determine any differences in velocity, cycle rate and cycle length at the maximum speed level in the different classical style and freestyle cross-country skiing techniques. Eight skilled male cross-country skiers were filmed with a digital video camera in the sagittal plane while skiing on a flat cross-country ski track. The skiers performed three classical style techniques the diagonal stride, kick double poling and the double poling technique and four freestyle techniques paddle dance (gear 2), double dance (gear 3), single dance (gear 4) and combiskate (gear 5) at four different self-selected speed levels slow, medium, fast and their maximum. Cycle duration, cycle rate, cycle length, and relative and absolute cycle phase duration of the different techniques at the different speed levels were analysed by means of a video analysis system. The cycle rate in all tested classical and freestyle techniques was found to increase significantly (p < .01) with speed from slow to maximum. Simultaneously, there was a significant decrease in the absolute phase durations of all the investigated skiing techniques. A minor, not significant, change in cycle length, and the significant increase in cycle rate with speed showed that the classical and freestyle cross-country skiing styles are dependent, to a large extent, on an increase in cycle rate for speed adaptation. A striking finding was the constant relative phase duration with speed, which indicates a simplified neural control of the speed adaptation in both cross-country skiing styles. For the practitioner, the knowledge about the importance of increasing cycle frequency rather than cycle length in the speed adaptation can be used to optimise a rapid increase in speed. The knowledge about the decrease in absolute phase duration, especially the thrust phase duration, points to the need for strength and technique training to enable force production at a high cycle rate and skiing speed. The knowledge that the relative phase duration stays constant with speed may be used to simplify the learning of the different cross-country skiing techniques. 相似文献
103.
Per Jauert Marko Ala-Fossi Golo Föllmer Stephen Lax Kenneth Murphy 《Journal of Radio & Audio Media》2017,24(1):7-27
In 2005–2006 the research group DRACE (Digital Radio Cultures in Europe) performed a study on how 43 people in key positions related to the radio industry in 4 European countries and Canada viewed the future of radio and which delivery technologies they considered would be most successful. In addition, it analyzed the motives and reasons certain technologies were seen as more promising than others. Finally, it presented 4 different future scenarios for radio media. The study was published in the Journal of Radio and Audio Media, May 2008.
In 2005 the future of radio was considered much less obvious and clear than it appeared 10 years previously. Instead of a transition from analog to digital audio broad- casting (DAB), there was a selection of alternative technological options for digital audio delivery. When looking back from 2015 and considering the results of expert interviews, the project group about Public Service Media in the HERA project: Transnational Radio Encounters found interesting perspectives in replicating this study—now looking forward to 2025. By using the same questionnaire and interviewing the same experts (or new persons in the same positions) they could compare the predictions with the present situation, looking for technological, regulatory, policy based, and user-oriented contexts. Furthermore, they could ask the experts to look 10 years forward to 2025. Besides from the interviews, desk studies were performed in order to explore the national similarities and differences as background for the analysis of the scenarios for the 2015 and 2025 studies.
This comparative study involves Denmark, Finland, Germany, Ireland, and the UK. 相似文献
104.
Ursula Reichenpfader Anette Wickström Madeleine Abrandt Dahlgren Per Nilsen Siw Carlfjord 《Studies in Continuing Education》2018,40(3):323-336
ABSTRACTMedication review, a systematic assessment of a patient’s medicines by a health care professional, is intended to prevent medication-related harms. A critical element of medication review concerns whether medication review is conducted in a coordinated way. This article draws from a case example of implementing medication review in two surgical wards of a Swedish regional hospital and aims to analyse how medication review is being accomplished with respect to the coordination of its actions. Using a practice-based ethnographic approach, we present several coordination mechanisms by illustrating how practices are connected to materials involved in medication review. Also, we show how common orientations, ends, and understandings expressed in different medication review practices contribute to the coordination of the practices. In conclusion, this article highlights the complexity of establishing and sustaining medication review as a coordinated practice in routine health care. By closely examining sociomaterial connections, this article sheds new light on the neglected issue of artefacts and arrangements in constituting and transforming a highly complex medication practice. 相似文献
105.
Gerd Schulte-Körne Kerstin U. Ludwig Jennifer el Sharkawy Markus M. Nöthen Bertram Müller-Myhsok Per Hoffmann 《Mind, Brain, and Education》2007,1(4):162-172
ABSTRACT— Our understanding of the causes of a developmental disorder like dyslexia has received recent input from both neuroscience and genetics. The discovery of 4 candidate genes for dyslexia and the identification of neuronal networks engaged when children read and spell are the basis for introducing this knowledge into education. However, the input from educational practitioners as well as empirical knowledge from research on learning also contribute significantly to our understanding of how children acquire the basic skills for learning to read and spell. It is imperative to merge the knowledge acquired from research in the fields of neuroscience, genetics, and empirical education, as well as to understand how the learning brain and instruction interact. Doing so can be seen as a major step in attaining an optimal approach for teaching, reading, and spelling and for finding the best suited and most effective treatment concepts for dyslexic children and adolescents. 相似文献
106.
Apprenticeships are required for many trades and can take different forms. In Sweden, one form can be viewed as a pathway where students complete a three-year-long vocational education in upper secondary school followed by a post-secondary apprenticeship in a particular trade. Another takes the form of vocational training within the framework of upper secondary school through an apprenticeship. This study analyses how a more clearly defined apprenticeship curriculum can provide sufficient knowledge to identify and understand learning outcomes in apprenticeships. A theoretical framework of an apprenticeship curriculum is used in the analytical work. The findings show that educational goals are often overlooked during apprenticeships, and thus a deliberative education is overridden by deliberative learning that stems from and is closely connected to the individual’s own perception of what to learn. By constituting an apprenticeship curriculum, this article contributes to an enhanced understanding of how to analyse vocational learning, and thus adds important elements to the research field. 相似文献
107.
Maria Hammarsten Per Askerlund Ellen Almers Helen Avery Tobias Samuelsson 《Journal of Adventure Education & Outdoor Learning》2019,19(3):227-241
Today, cities become more dense, green spaces disappear and children spend less time outdoors. Research suggests that these conditions create health problems and lack of ecological literacy. To reverse such trends, localities are creating urban green spaces for children to visit during school time. Drawing on ideas in ecological literacy, this study investigates school children’s perspectives on a forest garden, a type of outdoor educational setting previously only scarcely researched. Data were collected through walk-and-talk conversations and informal interviews with 28 children aged 7 to 9. Many children in the study expressed strong positive feelings about the forest garden, the organized and spontaneous activities there, and caring for the organisms living there. We observed three aspects of learning in the data, potentially beneficial for the development of children’s ecological literacy: practical competence, learning how to co-exist and care, and biological knowledge and ecological understanding. 相似文献
108.
In recent years, we have witnessed an upsurge in the attention given to Sport for Development and Peace (SDP). Yet, despite a burgeoning body of scholarship, SDP remains largely undertheorized. Emergent perspectives, however, point to the complex nature of SDP programmes. The purpose of this article is to assess how Sen’s Capability Approach – a normative framework rooted in human development – may help us better understand SDP at the conceptual level. In this paper, we analyse: (a) existing theories on SDP, (b) the Capability Approach and (c) implications of re-examining SDP through the Capability Approach. This includes an analysis of the applicability of the Capability Approach to SDP practice, policy and research. We conclude by suggesting that the Capability Approach provides a malleable normative framework that can promote conceptual clarity of SDP across a multitude of epistemological, theoretical and methodological perspectives. 相似文献
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110.
Physical fitness and muscular strength are important performance factors for Olympic class sailors, but the physical demands vary greatly between yacht classes, and limited information is available regarding the physical demands for the different crew positions. In the present paper, strength and aerobic capacity data from elite Olympic sailors are presented and compared with previous findings. Furthermore, a system for classification of Olympic class sailors is suggested. Peak aerobic capacity (peak oxygen uptake, VO(2peak)) and maximal isometric and isokinetic muscle strength of the knee extensors and flexors were assessed, together with the hamstring/quadriceps strength ratio (H/Q ratio). Peak aerobic capacity (ml O(2) . min(-1) . kg(-2/3)) was as follows: males - static hikers (n = 5) 215, s = 7; dynamic hikers (n = 8) 252, s = 17; trapezing helmsmen (n = 6) 234, s = 15; trapezing crew (n = 10) 239, s = 16; females - dynamic hikers (n = 6) 194, s = 16; trapezing crew (n = 2) 200, s = 13. Strength data for hikers, presented as peak moments (normalized to body weight) obtained during eccentric, isometric, and concentric contraction (Nm . kg(-1)) respectively were as follows: males - quadriceps: 3.66 (s = 0.68), 3.97 (s = 0.66), 1.82 (s = 0.34); hamstrings: 1.93 (s = 0.22), 1.38 (s = 0.41), 1.05 (s = 0.21); females - quadriceps: 3.84 (s = 0.71), 3.81 (s = 0.58), 1.60 (s = 0.28); hamstrings: 1.75 (s = 0.23), 1.10 (s = 0.16), 0.84 (s = 0.13). The peak moment based H/Q ratios for slow eccentric and concentric contractions were 0.42 (s = 0.11) and 0.39 (s = 0.04) for males and 0.43 (s = 0.06) and 0.39 (s = 0.04) for females respectively. Elite Olympic class sailors demonstrated high VO(2peak) values comparable to those observed in other non-endurance sports. The strength data revealed very high quadriceps strength for hikers, which is likely a result of the high muscle forces encountered during sailing, and a low H/Q ratio. To ensure optimal knee joint stabilization during sailing and other training activities, it is suggested that hikers should counter this strength imbalance by performing additional strength training for the hamstrings muscle group. 相似文献