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11.
Using self‐generated analogies has been proposed as a method in a constructivist tradition for students to learn about a new subject, by use of what they previously know. We report on a group exercise on using self‐generated analogies to make sense of two thermodynamic processes, reversible adiabatic expansion and free adiabatic expansion of an ideal gas. The participants (N = 8) were physics preservice teacher students at the fourth year of the teacher education program. A main finding was that work with self‐generated analogies tended to be accompanied by the students assuming ownership for their learning, manifested in terms of actions of choice and control and the use of exploratory talk. Consequently, several self‐generated analogies were elaborated and developed to a high‐order relational structure. However, we also found that with the use of self‐generated analogies in science teaching follows the risks of developing idiosyncratic explanations of the encountered phenomena or getting stuck in overly complex comparisons. Sammanfattning: Självgenererade analogier har förts fram som en metod i en konstruktivistisk tradition för att elever och studenter ska kunna lära sig något nytt genom att relatera till vad de redan vet. Vi redogör här för en gruppövning där självgenererade analogier användes för att förstå två termodynamiska processer: reversibel adiabatisk expansion, respektive fri adiabatisk expansion av en ideal gas. Åtta (N = 8) lärarstudenter på fjärde året av utbildningen med inriktning mot fysik på gymnasiet deltog i studien. Ett viktigt resultat var att vid arbete med självgenererade analogier tenderade studenterna att ta ägandeskap för sitt lärande, vilket tog sig uttryck i handlingar såsom aktiva val, kontroll över processen och explorativ dialog. Som en följd utvecklades flera av de självgenererade analogierna till ett stort strukturellt djup. Samtidigt såg vi att vid skapande av egna analogier löper studenter risken att utveckla egna förklaringar av de studerade fenomenen som inte svarar mot dem inom vetenskapen eller snärja in sig i alltför komplexa jämförelser. © 2012 Wiley Periodicals, Inc. J Res Sci Teach 49: 898–921, 2012 相似文献
12.
Fredrik Karlsson Jesper Holgersson Eva Söderström Karin Hedström 《Government Information Quarterly》2012
It has been argued that user participation is important when public authorities develop e-services. At the same time there is limited research on the usefulness of existing user participation approaches in public e-service development. In this paper we, therefore, analyze how the three user participation approaches – participatory design, user-centered design, and user innovation – meet the strategic e-service goals of the EU and the US. In doing so, we identify three challenges that need to be considered when choosing among these approaches: 1) unclear user target segments can impede the fulfillment of usability and relevance goals, 2) the nature of participation can impede the fulfillment of democracy goals, and 3) lack of adequate skills can impede the fulfillment of efficiency goals. 相似文献
13.
Use of self-generated analogies has been proposed as a method for students to learn about a new subject by reference to what they previously know, in line with a constructivist perspective on learning and a resource perspective on conceptual change. We report on a group exercise on using completion problems in combination with self-generated analogies to make sense of two thermodynamic processes. The participants (N = 8) were preservice physics teacher students at the fourth year of the teacher education program. The students experienced challenges in accounting for the constant entropy in reversible, adiabatic expansion of an ideal gas and the constant temperature in free, adiabatic expansion of an ideal gas. These challenges were found to be grounded in the students’ intuitive understanding of the phenomena. In order to come to terms with the constant entropy in the first process, the students developed idiosyncratic explanations, but these could by properly adjusted given suitable scaffolding. In contrast, the students by themselves managed to make sense of the constant temperature in free expansion, by use of microscopic explanatory models. As a conclusion, self-generated analogies were found to provide a useful approach to identifying challenges to understanding among students, but also for the students to come to terms with these challenges. The results are discussed against a background of different perspectives on the issue of conceptual change in science education. 相似文献
14.
Jesper Sjöström 《Science & Education》2013,22(7):1873-1890
This paper concerns Bildung-oriented chemistry education, based on a reflective and critical discourse of chemistry. It is contrasted with the dominant type of chemistry education, based on the mainstream discourse of chemistry. Bildung-oriented chemistry education includes not only content knowledge in chemistry, but also knowledge about chemistry, both about the nature of chemistry and about its role in society. In 2004 Mahaffy suggested a tetrahedron model based on Johnstone’s chemical triangle. The latter represents the formal aspects of chemistry teaching (macro, submicro, and symbolic) and the top of the tetrahedron represents a human element. In the present paper the following subdivision of the top is suggested (starting from the bottom): (1) applied chemistry, (2) socio-cultural context, and (3) critical-philosophic approach. The professional identity of the Bildung-oriented chemistry teacher differs from that of the chemist and is informed by research fields such as Philosophy of Chemistry, Science and Technology Studies, and Environmental Education. He/she takes a socio-critical approach to chemistry, emphasising both the benefits and risks of chemistry and its applications. 相似文献
15.
The main purpose of this paper is to focus attention on educational texts as central conveyers of discourses of sport into physical education teacher education (PETE) and by extension into physical education (PE). A considerable volume of research suggests that sport and games continue to be dominant elements of curriculum and practice in contemporary PE. Given the issues of masculinity, physicality and performativity resulting from such continuing sport-focused PE practice, it is relevant to question how such practices are discursively produced or reproduced. In this regard, one area has received only scant attention, namely the potential influence of educational texts used in PETE. Using the theoretical frameworks provided by Michel Foucault, Basil Bernstein and Norman Fairclough, this paper considers educational texts as important contributors to the discursive construction of knowledge in PETE, and thus also as a central resource for studying—and challenging—those discourses that influence on the PE teachers' perceptions of PE and their choices when it comes to the organisation of the PE class. This paper is based on a thorough examination of Danish PETE course documents listing educational texts prescribed by teacher educators for PETE programmes in Denmark. Several of the prescribed educational texts are published by private organisations with sporting interests, such as Team DK and The Sports Confederation of Denmark. This paper conducts a discourse analysis of these texts in order to illuminate how specific social rules regulate their content and involve specific constructions of the learner, the teacher and the relation between them. The paper's findings underline the need for an increased awareness among those who engage in PE practices of the ways in which discourses shape our thinking, and of the potential dangers that lie in the transfer of particular meanings and values as they are constructed in educational texts. 相似文献
16.
In Sweden, but also internationally, official regimes and public health organizations conduct fairly comprehensive antidoping measures. As a consequence, numerous ‘new’ ways to learn about and access these types of drugs have emerged. Social media and different internet forums, for example, have become part of a new self-help culture in which people can anonymously approach these substances, discuss their experiences of using them and minimize the possibility of encounters with the police. This article focuses on how the use of performance- and image-enhancing drugs (PED) is perceived and negotiated socially in the context of an internet-mediated and online community called Flashback. The results are in accordance with similar studies on internet bodybuilding communities. That is, even though the participants to a certain degree are aware of the risks and health costs of this kind of physical regime, the gains of using PED clearly dominate the discussions. Adding to this research, this article found that in the imaginary world of online bodybuilding a number of ideas about the ‘genetic max’, as well as the ultimate possibility of exceeding one’s limits, and creating something special and extraordinary, circulate. These stories confirm in many ways the legitimate mission of searching for the ultimate bodybuilding adventure, using different means and methods to transcend the limits of the self/body. 相似文献
17.
Neil Selwyn Jesper Aagaard 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(1):8-19
There is now an emerging worldwide trend for mobile phones being banned from classrooms and schools. While some academics working in the area of educational technology have raised concerns, many others have so far failed to respond to what is a significant shift in the ongoing development of digital education. The paper considers how academic researchers and other educational technology stakeholders can respond to what might be perceived as the curtailment of some forms of digital education. In particular, the paper argues that this current turn away from digital devices offers an opportunity to advance understandings about a number of seemingly problematic issues regarding the continued use of digital technologies in schools. In particular, the paper reconsiders five such areas of concern that are associated with banning phones from school: (1) technology addition; (2) digital distraction; (3) cyberbullying; (4) surveillance capitalism; and (5) environmental sustainability of digital education. 相似文献
18.
Fredrik Jeppsson Jesper Haglund Tamer G. Amin 《International Journal of Science Education》2015,37(5-6):780-805
Many studies have previously focused on how people with different levels of expertise solve physics problems. In early work, focus was on characterising differences between experts and novices and a key finding was the central role that propositionally expressed principles and laws play in expert, but not novice, problem-solving. A more recent line of research has focused on characterising continuity between experts and novices at the level of non-propositional knowledge structures and processes such as image-schemas, imagistic simulation and analogical reasoning. This study contributes to an emerging literature addressing the coordination of both propositional and non-propositional knowledge structures and processes in the development of expertise. Specifically, in this paper, we compare problem-solving across two levels of expertise—undergraduate students of chemistry and Ph.D. students in physical chemistry—identifying differences in how conceptual metaphors (CMs) are used (or not) to coordinate propositional and non-propositional knowledge structures in the context of solving problems on entropy. It is hypothesised that the acquisition of expertise involves learning to coordinate the use of CMs to interpret propositional (linguistic and mathematical) knowledge and apply it to specific problem situations. Moreover, we suggest that with increasing expertise, the use of CMs involves a greater degree of subjective engagement with physical entities and processes. Implications for research on learning and instructional practice are discussed. 相似文献
19.
Harisha Ramachandraiah Sahar Ardabili Asim M. Faridi Jesper Gantelius Jacob M. Kowalewski Gustaf M?rtensson Aman Russom 《Biomicrofluidics》2014,8(3)
Passive particle focusing based on inertial microfluidics was recently introduced as a
high-throughput alternative to active focusing methods that require an external force field to
manipulate particles. In inertial microfluidics, dominant inertial forces cause particles to move
across streamlines and occupy equilibrium positions along the faces of walls in flows through
straight micro channels. In this study, we systematically analyzed the addition of secondary Dean
forces by introducing curvature and show how randomly distributed particles entering a simple
u-shaped curved channel are focused to a fixed lateral position exiting the curvature. We found the
lateral particle focusing position to be fixed and largely independent of radius of curvature and
whether particles entering the curvature are pre-focused (at equilibrium) or randomly distributed.
Unlike focusing in straight channels, where focusing typically is limited to channel cross-sections
in the range of particle size to create single focusing point, we report here particle focusing in a
large cross-section area (channel aspect ratio 1:10). Furthermore, we describe a simple u-shaped
curved channel, with single inlet and four outlets, for filtration applications. We demonstrate
continuous focusing and filtration of 10 μm particles (with >90% filtration
efficiency) from a suspension mixture at throughputs several orders of magnitude higher than flow
through straight channels (volume flow rate of 4.25 ml/min). Finally, as an example of high
throughput cell processing application, white blood cells were continuously processed with a
filtration efficiency of 78% with maintained high viability. We expect the study will aid in the
fundamental understanding of flow through curved channels and open the door for the development of a
whole set of bio-analytical applications. 相似文献
20.
Jesper Sjöström Nadja Frerichs Vânia G. Zuin Ingo Eilks 《Studies in Science Education》2017,53(2):165-192
Bildung is a complex educational concept that emerged in Germany in the mid eighteenth century. Especially in Germany and Scandinavia conceptions of Bildung became the general philosophical framework to guide both formal and informal education. Bildung concerns the whole range of education from setting educational objectives in general towards its particular operation in different school subjects, among them science education. In more recent years, the concept of Bildung has slowly begun to be used in the international science and environmental education literature. This paper presents a systematic analysis of the international literature concerning the use of the concept of Bildung, with a view on its meaning in and for science education. At least five versions based on or closely connected to the tradition of Bildung can be identified: (a) Von Humboldt’s classical Bildung, (b) Anglo-American liberal education, (c) Scandinavian folk-Bildung, (d) democratic education, and (e) critical-hermeneutic Bildung. These different understandings of Bildung are discussed in relation to their historical roots, educational theory, critique, and their relation to philosophies of science education, such as different visions of scientific literacy. Based on critical-hermeneutic Bildung, the paper theoretically develops views of critical-reflexive Bildung as an educational metatheory. It is connected to ideas of transformative learning, sustainability education and a Vision III of scientific literacy. Finally, some implications of critical-reflexive Bildung for teaching and learning are discussed. 相似文献