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Luca Benedetti Simona Quartieri Rinaldo Cervellati Daniela Perugini 《International Journal of Science Education》2013,35(4):439-445
Responses to a written beliefs test for 178 eighth grade students and interviews with a subset of the students are analysed to investigate students' beliefs about the tentativeness of scientific knowledge and about the autonomy and strategies appropriate for science learning. These three dimensions of beliefs are salient because they align with the image of science teaching promoted by current reform movements. Analyses focus on change in beliefs and relationships among dimensions of beliefs and between those beliefs and students' understandings of science concepts. Results show that students' beliefs do not change much during the one-semester course. Students who view scientific knowledge as tentative also try to understand science. Autonomous students do not hold the most productive learning strategies, though students with low autonomy develop significantly less coherent understandings of science concepts. Instructional implications focus on potential roles of teachers and technology in promoting productive beliefs about scientific knowledge and science learning. Implications for individualized instruction follow classroom-level implications. 相似文献
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A Working on What Works (WOWW) approach was utilised over six sessions in a mainstream Scottish primary class to enhance classroom relationships and behaviours. The aim of the intervention was to manage everyday classroom problems within a natural classroom environment. WOWW incorporates positive psychology and implements a solution-focused approach. The quantitative results illustrated an improvement in the teacher ratings and class ratings for the class goals set by the class teacher, and helped the teacher to feel more confident in her class. From the qualitative comments, class teacher and pupils reported a positive experience of WOWW and noticed a difference within the classroom. In summary, WOWW influenced a positive change to relationships and behaviour within the classroom. 相似文献
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Every voice speaks to particular ways of knowing as it positions the speaker within an epistemological community. Each of our images of what constitutes knowing, and hence knowledge, is part of what structures one's subjectivity: what is valued as truth or discarded as fiction... Views of knowing tell individuals which accounts count and likewise which accounts do not count. Knowledge then, is not so much about immutable truths as it is about “historical products of certain practices.” (Britzman, 1991, p.23‐23) 相似文献
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Electromagnetic form factors are fundamental observables that describe the electric and magnetic structure of hadrons and provide keys to understand the strong interaction. At the Beijing Spectrometer (BESIII), form factors have been measured for different baryons in the time-like region for the first time or with the best precision. The results are presented with examples focused on but not limited to the proton/neutron, the Λ, with a strange quark, and the Λc, with a charm quark. 相似文献
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Robbie S Wilson Nicholas M A Smith Solange de Paula Ramos Fabio Giuliano Caetano Marcio Aparecido Rinaldo Paulo Roberto Pereira Santiago 《Journal of sports sciences》2019,37(9):1072-1079
This study assessed whether a new, closed-skill dribbling or sprinting task could predict attacking performance in soccer. Twenty-five male players were recruited from the Londrina Junior Team Football Academy in Brazil and asked to either dribble the ball or sprint through five custom circuits that varied in average curvature (0–1.37 radians.m?1). These measures were then validated using a realistic one vs. one competition in which each player acted as attacker or defender in turn (N = 1330 bouts). Sprinting (ICC = 0.96) and dribbling (ICC = 0.97) performances were highly repeatable for individual players. Average dribbling speed decreased non-linearly with increasing circuit curvature (F = 239.5; P < 0.001) from 5.19 ± 0.11 ms?1 on the straightest path to 2.13 ± 0.03 ms?1 on the curviest. Overall, dribbling but not sprinting performance predicted attacking success in the one vs. one competition, explaining more than 50% of the variation in attacking success alone (rp = 0.70; P < 0.001). In conclusion, our new closed-skill dribbling assessment is a valid and reliable protocol to predict a soccer player’s success in attacking performance in one vs. one situation, and can be used to identify talented players. 相似文献
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ABSTRACT Research indicates that reality TV viewing frequency and involvement with reality TV are linked. However, previous studies employed cross-sectional designs and were carried out among college students and general adult population, but not among the most frequent consumers of reality TV: adolescents. To better understand the causal link between this demographic segment’s reality TV viewing and involvement, we conducted a longitudinal study among 392 adolescents (ages 15 to 17). Frequency of reality TV viewing increased narrative engagement, parasocial interaction, emotional empathy, merging with the characters, wishful identification, perceived realism, and enjoyment of reality TV six months later. No reverse effects on viewing existed. 相似文献
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Youth turnout at European Parliamentary elections has been dwindling. This study investigates the impact of news media exposure on electoral participation of first time voters. Relying on a data set that combines content analysis of news stories about the EU (N = 769) and a multiple wave panel survey (N = 994), we analyze the impact of exposure to online and offline coverage of relevant topics on turn out across a period of 6 months. We find that exposure to news in offline media had no significant effect on participation, whereas exposure to relevant news in online media positively affected turnout. 相似文献
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INTRODUCTION Communication networks are growing quickly. Throughput, delays and losses become unpredictable because of heterogeneity and congestion. This results in lack of quality of service. Today’s solution is based on standard video codecs (as MPEG-2) that do not allow scalability and yield low quality at low bit-rates, complex forward error correction (FEC) codes that are not easily used with time-varying channels and must be set to face the worst case, and automatic repeat re- q… 相似文献
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This paper provides fresh empirical evidence on technological innovation in the service sector, and highlights major similarities and differences with manufacturing. The main findings are the following. Technological innovation is quite a diffused and variegated phenomenon in market services. Engineering, technical consultancy, computing and software emerge as the most innovative sectors. Innovation expenditure per employee in these industries is rather close to the manufacturing average. Service firms as well as the manufacturing ones rely on a wide range of innovation sources. The acquisition and development of software and investment in machinery are the most cited. Investment, R&D and software are the major components of firms' innovation expenditure. Both in services and manufacturing the most important objective of firms' innovation strategies consist of improving service/product quality, increasing market shares and reducing production costs. Major obstacles for introducing technological innovation in services, as well as in manufacturing, are of an economic nature—i.e. lack of appropriate sources of finance and cost of innovation too high. Technological information is drawn mainly from in-house production departments as well as from outside suppliers of equipment, clients and customers. Again this is a pattern which is quite similar to the one found in the manufacturing sector. Finally, in the near future the importance of technology for firms' performance is expected to increase in all service industries. Overall, service and manufacturing sectors show more similarities than differences with respect to some basic dimensions of innovation processes. 相似文献