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排序方式: 共有358条查询结果,搜索用时 15 毫秒
51.
John P. Helveston Yanmin Wang Valerie J. Karplus Erica R.H. Fuchs 《Research Policy》2019,48(1):206-222
A vast literature on technology transitions within industries suggests that early phases of new technologies are marked by periods of intense experimentation, but we know little about the conditions under which these periods emerge. We apply inductive, grounded theory-building techniques to examine what prompts firms to experiment across one emerging technology platform—plug-in electric vehicles (PEVs)—in China. Triangulating annual vehicle make and model sales data from 2003 to 2016 (plus monthly data from 2010 to 2016); 112 English and Mandarin archival documents from industry, academic, and news outlets; and 51 semi-structured interviews with industry, government, and academic stakeholders, we develop four in-depth case studies. We find that in contrast to the innovation trajectories of multinational and Chinese arms of joint venture (JV) firms, independent domestic Chinese firms (those with no history of international JV partnerships) are undertaking significant experimentation across multiple levels—infrastructure, core system, subsystem, and component—of the emerging PEV technology platform. We propose the concept of “institutional complementarities” to describe how interactions among institutions—here the national JV regulation and local market support and subsidies—may have turned regional markets into protected laboratories, extending the incubation periods for independent domestic firm experimentation. While this diverse experimentation may be an important antecedent of technology transition, consolidation induced by national policy standardization or competitive pressure may be required for PEV innovations to scale beyond their early, protected regional markets. 相似文献
52.
Ariana Orvell Giulia Elli Valerie Umscheid Ella Simmons Ethan Kross Susan A. Gelman 《Child development》2023,94(1):159-171
A critical skill of childhood is learning social norms. We examine whether the generic pronouns “you” and “we,” which frame information as applying to people in general rather than to a specific individual, facilitate this process. In one pre-registered experiment conducted online between 2020 and 2021, children 4- to 9-year-old primarily living in the midwestern U.S. (N = 146, 75 girls, 71 boys, Mage = 7.14, SD = 1.69, 82% White) interpreted actions described with generic pronouns (vs. “I”) as normatively correct and selected the speaker who used generic pronouns as the rule-follower, particularly when generic pronouns were presented first. There were no significant effects of age. These results illustrate how generic pronouns influence how children discern unfamiliar norms and form interpersonal judgments. 相似文献
53.
Valerie Talsma 《The Journal of environmental education》2013,44(3):26-30
Abstract The Rouge Education Project (REP) is a school-based environmental education program that uses water monitoring, telecommunications, and student actions to improve water quality. The author carried out a program evaluation to better understand the challenges generated by such a program. She examined surveys, interviews, and focus groups to determine the level of participation, goals, objectives, value of support services, and changes in teaching and environmental awareness. The results indicated that the REP met its goals of increasing awareness and concern about the Rouge River and developing a supportive curriculum in science classrooms. This article illustrates the importance of inservice workshops and curriculum resources for successful program enactment. 相似文献
54.
Polly R. Husmann Valerie Dean O'Loughlin Mark W. Braun 《Anatomical sciences education》2009,2(5):218-226
This study compares overall laboratory averages and individual test scores along with a student survey to determine the effects of using virtual microscopy in place of optical microscopes in a large undergraduate human anatomy course. T‐tests revealed that the first two laboratory examinations (of four) and the overall laboratory averages were significantly increased compared with the previous year. We hypothesize that this is due to students' ability to use and understand the technology quickly as opposed to learning how to maneuver an optical microscope. Students also responded positively in a survey about the virtual microscope, indicating that increased accessibility, ease of use, and the ability to understand the material were important components of the virtual microscope. In addition, an increase in student collaboration was noted because multiple students were able to view the image at a time. This level of acceptance of virtual microscopy has been reported in previous studies, though this level of increased examination scores is rare. We attribute this to differences between the medical students, with whom this technology has been researched in the past, and undergraduate introductory students. Anat Sci Educ 2:218–226, 2009. © 2009 American Association of Anatomists. 相似文献
55.
This paper contrasts the notion of ‘independent learning’ as perceived by two informant groups at a UK institution of higher education: (1) teachers, educators and providers of education and (2) their students or ‘consumers’ of education. Both informant groups are staff and students studying in a culture different to that of their first education. They are identified in their receiving institution as ‘international’, or have identified themselves as such. The experience of transition into a UK University was explored with both informant groups, through interviews and focus groups, over a cycle of two years. ‘Independent learning’ as rhetoric and practice emerged for both groups as an issue in their transition from familiar to unfamiliar learning culture. Three key insights emerged. Firstly, a mismatch is identified between teacher perceptions and student interpretation of ‘independent learning’ expectations and practice. Secondly, it emerges that student experience of the learning culture is in a state of continuous flux, evolving between first arrival and end of programme through cycles of bafflement and empowerment. Finally, both students and teachers identify a number of strategies for dealing with this experience of ‘transitional’ independence. The paper concludes by recommending a notion of ‘phased scaffolding’ that might inform educational practice and by reflecting on the implications for the educator in revisiting received educational discourse from the perspective of participants negotiating a second learning culture. 相似文献
56.
K. Gross-Glenn Bonnie Jallad Loriana Novoa Valerie Helgren-Lempesis H. A. Lubs 《Reading and writing》1990,2(2):161-173
We examined Nonsense-Passage oral reading in adults, using data derived from new and previously published studies (Finucci et al 1976, Gross-Glenn et al 1985). Time-scores and error-frequency data are presented for five samples of non-dyslexic readers with a minimum of a high-school education and no childhood history of dyslexia (N=127). Considerable uniformity is demonstrated across these samples, and reading performance of non-dyslexic individuals contrasts sharply with that observed in four samples of adult familial dyslexics. Both affected and compensated-affected dyslexic subjects read the passages significantly more slowly and with more errors than did nondyslexic readers. Results are discussed in relation to the cognitive and neural processes that may underlie this specific reading difficulty in dyslexics. We have found Nonsense-Passage reading to be especially useful in family studies of inherited dyslexia as a means of quantifying oral reading deficits in adults who have learned to compensate for their children reading difficulties. 相似文献
57.
Chayna J. Davis Valerie S. Knopik Richard K. Olson Sally J. Wadsworth John C. DeFries 《Annals of dyslexia》2001,51(1):231-247
The present study assesses the genetic and environmental etiologies of reading, rapid naming (RN), and their covariation by
fitting multivariate structural equation models to data from 587 twin pairs in which at least one member of the pair exhibited
reading difficulties (low-range) and from 360 control (normal-range) twin pairs who were tested in the Colorado Learning Disabilities
Research Center. Results from a bivariate phenotypic analysis with two hypothesized latent factors, READ and RN, indicated
that the correlation between reading and rapid naming performance for the low-range sample was significantly higher than that
of the normal-range sample. When this model was partitioned to include estimates of genetic, shared environmental, and nonshared
environmental influences, resulting heritability estimates did not differ significantly for the low-range and normal-range
samples for either READ or RN. However, similar to the phenotypic correlation, the genetic correlation between the READ and
RN latent factors could not be equated for the two groups. Thus, the etiology of the relationship between reading performance
and rapid naming may differ for children with reading difficulties and normally-achieving readers. Moreover, these results
support previous findings that the best predictors of reading skills may differ for samples of children with normal reading
levels and those with reading difficulties. 相似文献
58.
As advances in microfluidics continue to make contributions to diagnostics and life sciences, broader awareness of this expanding field becomes necessary. By leveraging low-cost microfabrication techniques that require no capital equipment or infrastructure, simple, accessible, and effective educational modules can be made available for a broad range of educational needs from middle school demonstrations to college laboratory classes. These modules demonstrate key microfluidic concepts such as diffusion and separation as well as "laboratory on-chip" applications including chemical reactions and biological assays. These modules are intended to provide an interdisciplinary hands-on experience, including chip design, fabrication of functional devices, and experiments at the microscale. Consequently, students will be able to conceptualize physics at small scales, gain experience in computer-aided design and microfabrication, and perform experiments-all in the context of addressing real-world challenges by making their own lab-on-chip devices. 相似文献
59.
Valerie Brett Martina Mullally Bill O'Gorman Nerys Fuller-Love 《Action Learning: Research and Practice》2012,9(2):125-143
Developing sustainable learning networks for entrepreneurs is the core objective of the Sustainable Learning Networks in Ireland and Wales (SLNIW) project. One research team drawn from the Centre for Enterprise Development and Regional Economy at Waterford Institute of Technology and the School of Management and Business from Aberystwyth University has contributed to the understanding of how to create sustainable business learning networks for entrepreneurs. The research findings are attributed to action research by the conduction of two separate cycles in the forum of research projects. The first cycle, called Female Entrepreneurs in Ireland and Wales, produced findings that were reflected on and investigated further by the research team through the establishment of the second cycle named SLNIW. This paper discusses the two action research cycles through the action sets of planning, action, observing and reflecting and the contribution of the development of understanding and practice of networking for entrepreneurs through the production of guidelines for establishing sustainable learning networks. 相似文献
60.
Optical versus virtual: teaching assistant perceptions of the use of virtual microscopy in an undergraduate human anatomy course 总被引:1,自引:0,他引:1
Many studies that evaluate the introduction of technology in the classroom focus on student performance and student evaluations. This study focuses on instructor evaluation of the introduction of virtual microscopy into an undergraduate anatomy class. Semi-structured interviews were conducted with graduate teaching assistants (TA) and analyzed through qualitative methods. This analysis showed that the teaching assistants found the virtual microscope to be an advantageous change in the classroom. They cite the ease of use of the virtual microscope, access to histology outside of designated laboratory time, and increasing student collaboration in class as the primary advantages. The teaching assistants also discuss principal areas where the use of the virtual microscope can be improved from a pedagogical standpoint, including requiring students to spend more time working on histology in class. 相似文献