On incrustation of marine boilers     

P. Jensen 《Journal of The Franklin Institute》1866,82(3):145-152

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Conceptual Metaphor and Embodied Cognition in Science Learning: Introduction to special issue     

Tamer G. Amin  Fredrik Jeppsson  Jesper Haglund 《International Journal of Science Education》2015,37(5-6):745-758

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User community vs. producer innovation development efficiency: A first empirical study     

Christoph Hienerth  Eric von Hippel  Morten Berg Jensen 《Research Policy》2014

In this paper we report upon a first empirical exploration of the relative efficiency of innovation development by product users vs. product producers. In a study of over 50 years of product innovation in the whitewater kayaking field, we find users in aggregate were approximately 3× more efficient at developing important kayaking product innovations than were producers in aggregate. We speculate that this result is driven by what we term “efficiencies of scope” in problem-solving. These can favor an aggregation of many user innovators, each spending a little, over fewer producer innovators benefitting from higher economies of scale in product development. We also note that the present study explores only one initial point on what is likely to be a complex efficiency landscape.  相似文献   

Evaluating the impact of an academic teacher development program: practical realities of an evidence-based study     

Gail A. Rathbun  Jane Leatherman  Rebecca Jensen 《Assessment & Evaluation in Higher Education》2017,42(4):548-563

This study aimed to assess the impact of an entire academic teacher development programme at a Midwestern masters comprehensive university in the United States over a period of five years by examining changes in teaching and student outcomes of nine randomly selected programme participants. Researchers analysed syllabi, course evaluations, grade distributions, programme activity reports, interviews and vita, and concluded that the centre’s impact was greatest on tenure-track faculty who struggled with their teaching. Far more useful to future improvement, however, were the insights gained from reflection on study methods, the researchers’ emotional responses to their findings, their struggle to make sense of the data and grappling with the definition of ‘impact’. In this paper, the researchers share useful lessons learned and illustrate the difficulties inherent in evaluating academic development programmes, with a view to qualifying recommendations currently prevailing in the literature.  相似文献   

Introducing postphenomenological research: a brief and selective sketch of phenomenological research methods     

Jesper Aagaard 《International journal of qualitative studies in education》2017,30(6):519-533

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Public participation: democratic ideal or pragmatic tool? The cases of GM foods and functional foods     

Nielsen AP  Lassen J  Sandøe P 《Public understanding of science (Bristol, England)》2011,20(2):163-178

Over recent decades, public participation initiatives have been employed across Europe often with a focus on science and technology issues. In the area of new food technologies most participation initiatives have centered on genetically modified foods. By contrast, in the area of functional foods--where significant EU legislation was recently passed--we have seen no initiatives towards public inclusion. This applies also for Denmark, the country which is the focus of this article. Based on an interview study with members of the Danish parliament the article examines why such considerable differences exist between initiatives to involve the public, and it challenges the role that public participation plays in Danish politics. The main claim made in the article is that although politicians argue for the value and relevance of public participation their willingness to initiate participatory processes is overruled by their concern with playing by the rules of the political game.  相似文献   

Effects of strategy use on children's motor performance in a continuous timing task     

Liu T  Jensen JL 《Research quarterly for exercise and sport》2011,82(2):198-209

The purposes of this study were to associate age-related performance deficits in children with the use of recall strategies and to determine whether children who performed poorly in cycling would benefit from learning a recall strategy. In Experiment 1, 18 younger children (ages 5-7years) and 18 older children (ages 8-10 years) were asked to recall selected pedaling cadences. The majority of the older children used strategies and performed with less error than the younger children. In Experiment 2, children with a high number of errors in Experiment 1 were assigned to an experimental or a control group. The children in the experimental group were taught to use a specific recall strategy. The results showed that children who received the instruction in strategy use improved their performance.  相似文献   

Future Sex Educator Perceptions of Rural Versus Urban Instruction: A Case for Community-Centered Sexual Health Education     

Christina L. Jones  Robin E. Jensen  Abigail Selzer King 《American journal of sexuality education》2014,9(4):464-484

Instructors of sexual health courses in rural areas face unique challenges as they are often forced to use school-based prevention curricula field-tested in urban areas. Research has yet to consider what future sex educators’ regional expectations are for their profession and how those expectations might have an impact on the classroom. Drawing from interviews with 26 sex-educators-in-training, we find that future educators tended to expect that rural communities would be less diverse, more conservative, and less informed about sexual health matters, even though research demonstrates that today's rural communities inconsistently align with those perceptions.  相似文献   

Lower Secondary Education in Denmark     

Thyge Winther‐Jensen 《Compare》1980,10(2):127-132

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Comparison of 2D video and electrogoniometry measurements of knee flexion angle during a countermovement jump and landing task     

Erich Petushek  Chris Richter  David Donovan  William P. Ebben  Phillip B. Watts  Randall L. Jensen 《Sports Engineering》2012,15(3):159-166

Quantifying countermovement jump (CMJ) and landing knee flexion angle is important for performance and injury risk assessment. The purpose of the study was to compare electrogoniometer (El-Gon)- and video-derived CMJ and landing knee flexion angle. Twenty-two adults performed three CMJs while knee flexion angle was simultaneously assessed using an El-Gon and video. The average systematic offset (RMSE) of the El-Gon-derived knee flexion angle throughout the entire movement was 7.03°?±?2.69°. Excellent reliability was demonstrated by the El-Gon (ICCavg?=?0.92). Countermovement knee flexion angle, maximum landing knee flexion angle and flexion angle at maximum vertical ground reaction force were 12.0°, 10.9°, and 5.7° higher, respectively, when assessed using El-Gon (p?<?0.001), compared to video. Errors between instruments are likely due to El-Gon crosstalk, misalignment and/or axis determination. The El-Gon is a cost-effective and time-efficient alternative to video analysis for the assessment of knee flexion angle if the error is accounted for and the sensor is precisely attached.  相似文献