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41.
In this paper, we argue that history might have a profound role to play for learning mathematics by providing a self-evident
(if not indispensable) strategy for revealing meta-discursive rules in mathematics and turning them into explicit objects
of reflection for students. Our argument is based on Sfard’s theory of Thinking as Communicating, combined with ideas from historiography of mathematics regarding a multiple perspective approach to the history of practices
of mathematics. We analyse two project reports from a cohort of history of mathematics projects performed by students at Roskilde
University. These project reports constitute the experiential and empirical basis for our claims. The project reports are
analysed with respect to students’ reflections about meta-discursive rules to illustrate how and in what sense history can
be used in mathematics education to facilitate the development of students’ meta-discursive rules of mathematical discourse. 相似文献
42.
Morten Kronstad 《Journalism Practice》2016,10(1):123-139
This article offers a view of how journalism students in higher education conceptualize and develop critical reflection in the meeting between student and teacher. Critical reflection is seen as a key asset in journalism and a key process in bringing together practice and knowledge, thus closing the gap between theory and practice. In an attempt to understand how critical reflection is developed, a field study was conducted in a bachelor's programme in journalism, where one teacher and 12 students were observed and interviewed during two semesters in the students’ second year. 相似文献
43.
Dorthe Refslund Christensen Ylva Hård af Segerstad Dick Kasperowski Kjetil Sandvik 《广播与电子媒介杂志》2017,61(1):58-72
This article presents results from case studies of online grief communities for bereaved parents in Denmark and Sweden, analyzing how development of practices and norms for grieving and mourning online are related to the conditions for participation in the online forums, and to dominant ideas of grief in society as such. Rooted in contemporary research on grief and mourning, we discuss practices of tabooization, de-tabooization, or even re-tabooization in the different online forums and how norms and traditions are performed, challenged, and negotiated in the various formats. 相似文献
44.
In this article, we address how the design of educational scenarios can support teachers’ adoption of both technology and open-ended projects indorsing creativity and innovation. We do that by describing how groups of teachers develop digital learning environments supporting using a combination of GeoGebra and Google sites. Both teachers and pupils work with the concept of “game” as something they design, and furthermore, the pupils immerse themselves into the scenarios that the teachers create in a way similar to “playing a game.” We investigate teachers participation in collaborative development and testing through qualitative means, aiming to describe the teachers’ appropriation of (1) GeoGebra as a tool for doing and teaching mathematics, and (2) game as a metaphor supporting open-ended projects addressing creativity and innovation in the classroom. The data from the project suggest that the notion of “game” can support collaborative scenario design is a viable way of introducing technology and open-ended projects to primary school teachers. 相似文献
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Terje Grntoft Marianne Odlyha Peter Mottner Elin Dahlin Susana Lopez-Aparicio Slawomir Jakiela Mikkel Scharff Guillermo Andrade Michal Obarzanowski Morten Ryhl-Svendsen David Thickett Stephen Hackney Jrgen Wadum 《Journal of Cultural Heritage》2010,11(4):81-419
Pollutants and their potential degradation of paintings have been measured for the first time in microclimate frames (mc-frames), which are used to protect paintings. The pollutants that were measured include both inorganic pollutants, which originate mainly from external sources, and organic pollutants from mainly internal sources. Those originating from the outdoors enter rooms and subsequently mc-frames at a rate depending on the ventilation rates (air exchange rates) of the mc-frames. The concentration of gaseous pollutants emitted within the mc-frames will depend on net emission rates of the materials used to make the mc-frames, their design, and their ventilation rates. In the EU PROPAINT project measurements of gaseous air pollutants and climatic conditions were performed at various locations both inside and outside different state-of-the-art mc-frames. Diffusive passive pollution gas samplers were used together with different types of dosimeters. Results show that the dosimeters respond to either the photo-oxidizing conditions or the level of volatile organic acids in the environments both in the museums and within the mc-frames. Two dosimeters, the Early Warning Organic (EWO) made from a synthetic polymer and the Resin Mastic coated Piezo electric Quartz Crystals (RM-PQC) respond to photo-oxidation and showed higher values outside than inside the mc-frames. Two other dosimeters, the Glass Slide Dosimeter (GSD) and the Lead coated Piezo electric Quartz Crystals (L-PQC) respond to volatile organic acids and yielded higher values inside than outside the mc-frames. This study emphasizes the need for further work to determine environmental damage functions for paintings, in particular for the effects of organic acids. Such information is essential for the evaluation of the protective effects of mc-frames for paintings. The use of mc-frames is increasing and it is very important to know that this protective measure does not introduce new risks. 相似文献
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48.
Peter Krustrup Werner Helsen Morten B. Randers Jesper F. Christensen Christopher MacDonald Antonio Natal Rebelo 《Journal of sports sciences》2013,31(11):1167-1176
Abstract Time-motion analyses and physiological measurements were performed to investigate the physiological demands of football referees (n = 15) and assistant referees (n = 15) in international games and to examine whether high-intensity running (HIR) correlates to the referees' ability to keep up with play. Total distance covered (10.27 ± 0.90 vs. 6.76 ± 0.83 km) and HIR (1.92 ± 0.58 vs. 0.97 ± 0.22 km) was higher (P < 0.05) for referees than assistant referees, while sprinting distance was not different. Referees covered 0.89 ± 0.37 km by backwards running and assistant referees covered 1.54 ± 0.66 km by sideways running. Mean heart rate was higher (P < 0.05) for referees than assistant referees (150 ± 3 vs. 123 ± 3 b.p.m.), whereas blood lactate was not different. Backwards/sideways running decreased (P < 0.05) from the first to the last 15-min period for referees (49%) and assistant referees (42%), whereas HIR was unaltered. HIR was inversely correlated with the five highest distances from infringements in both halves (r = ?0.60 and ?0.58, P < 0.05). In conclusion, international match officials carry out an important amount of HIR throughout games, while low-intensity and unorthodox running activities are reduced during games. Referees performing the most high-intensity work are better to keep up with play. The match activities differ significantly between referees and assistant referees, which should be considered in training and testing procedures. 相似文献
49.
Jørgen Ingebrigtsen Mads Bendiksen Morten Bredsgaard Randers Carlo Castagna Peter Krustrup Andreas Holtermann 《Journal of sports sciences》2013,31(13):1337-1345
Abstract We examined performance, heart rate response and construct validity of the Yo-Yo IR2 test by testing 111 elite and 92 sub-elite soccer players from Norway and Denmark. VO2max, Yo-Yo IR1 and repeated sprint tests (RSA) (n = 51) and match-analyses (n = 39) were also performed. Yo-Yo IR2 and Yo-Yo IR1 performance was 41 and 25% better (P < 0.01) for elite than sub-elite players, respectively, and heart rate after 2 and 4 min of the Yo-Yo IR2 test was 20 and 15 bpm (9 and 6% HRmax), respectively, lower (P < 0.01) for elite players. RSA performance and VO2max was not different between competitive levels (P > 0.05). For top-teams, Yo-Yo IR2 performance (28%) and sprinting distance (25%) during match were greater (P < 0.05) than for bottom-teams. For elite and sub-elite players, Yo-Yo IR2 performance was correlated (P < 0.05) with Yo-Yo IR1 performance (r = 0.74 and 0.76) and mean RSA time (r = ?0.74 and ?0.34). We conclude that the Yo-Yo IR2 test has a high discriminant and concurrent validity, as it discriminates between players of different within- and between-league competitive levels and is correlated to other frequently used intermittent elite soccer tests. 相似文献
50.
Joseph Mintz Morten Aagaard 《Educational technology research and development : ETR & D》2012,60(3):483-499
Persuasive technology is a sub-discipline of Human?CComputer Interaction that has emerged within the last 10?years, and which has generated increasing interest in the application of persuasion to systems design. Most applications have to date been developed in commercial contexts, as well in the domain of health promotion. We present a mainly theoretical consideration of how persuasive technology could be used in educational contexts, particularly in school settings. We consider how persuasive technology design may need to be modified to meet the needs of complex educational settings. We propose four design principles for the use of persuasive technology in instructional design, including credibility and Kairos. We derive these from theoretical considerations, as well as from our experience with the HANDS project, which has developed a mobile persuasive application for positive behaviour change in young people with Autistic Spectrum Disorders. We conclude that persuasive technology has the potential to be used effectively to bring about positive behavior and attitude change in school settings. 相似文献