The technology policy experiment as a policy research tool     

Gregory Tassey 《Research Policy》1985,14(1):39-52

The use of experimentation as a policy change tool is described and assessed, based on the experience of the Experimental Technology Incentives Program (ETIP). ETIP conducted innovation-related policy experiments with U.S. government agencies in the areas of regulation, procurement, venture capital, R&D funding, and technology commercialization. A case study of a policy experiment with new analytical and institutional procedures for monitoring the impacts of venture capital market regulations is used to show how the policy experiment can provide an iterative and low-risk, low-cost approach to policy change. Equally important, instututionalization of the procedures for monitoring existing policies and the provision of decision-relevant information are shown to be important benefits from policy experimentation in the context of the overall policy change process. The reasons behind ETIP's termination after 10 years of operation are themselves important lessons for institutions involved in the development and management of industry growth policies.  相似文献   

A cultural historical activity theory perspective to understand preservice science teachers’ reflections on and tensions during a microteaching experience     

Asli Sezen-Barrie  Minh-Dan Tran  Scott P. McDonald  Gregory J. Kelly 《Cultural Studies of Science Education》2014,9(3):675-697

  相似文献   

Insulator-based dielectrophoresis of mitochondria     

Jinghui Luo  Bahige G. Abdallah  Gregory G. Wolken  Edgar A. Arriaga  Alexandra Ros 《Biomicrofluidics》2014,8(2)

Isolated mitochondria display a wide range of sizes plausibly resulting from the coexistence of subpopulations, some of which may be associated with disease or aging. Strategies to separate subpopulations are needed to study the importance of these organelles in cellular functions. Here, insulator-based dielectrophoresis (iDEP) was exploited to provide a new dimension of organelle separation. The dielectrophoretic properties of isolated Fischer 344 (F344) rat semimembranosus muscle mitochondria and C57BL/6 mouse hepatic mitochondria in low conductivity buffer (0.025–0.030 S/m) at physiological pH (7.2–7.4) were studied using polydimethylsiloxane (PDMS) microfluidic devices. First, direct current (DC) and alternating current (AC) of 0–50 kHz with potentials of 0–3000 V applied over a channel length of 1 cm were separately employed to generate inhomogeneous electric fields and establish that mitochondria exhibit negative DEP (nDEP). DEP trapping potential thresholds at 0–50 kHz were also determined to be weakly dependent on applied frequency and were generally above 200 V. Second, we demonstrated a separation scheme using DC potentials <100 V to perform the first size-based iDEP sorting of mitochondria. Samples of isolated mitochondria with heterogeneous sizes (150 nm–2 μm diameters) were successfully separated into sub-micron fractions, indicating the ability to isolate mitochondria into populations based on their size.  相似文献   

Episteme,demonstration, and explanation: A fresh look at Aristotle’s Posterior Analytics     

Gregory Salmieri  David Bronstein  David Charles  James G. Lennox 《Metascience》2014,23(1):1-35

  相似文献   

Relationships between functional movement screen scores,maturation and physical performance in young soccer players     

Rhodri S. Lloyd  Jon L. Oliver  John M. Radnor  Benjamin C. Rhodes  Avery D. Faigenbaum  Gregory D. Myer 《Journal of sports sciences》2015,33(1):11-19

The purpose of this study was to examine relationships between functional movement screen scores, maturation and physical performance in young soccer players. Thirty males (11–16 years) were assessed for maturation, functional movement screen scores and a range of physical performance tests (squat jump, reactive strength index protocol and reactive agility cut). Older players significantly outperformed younger participants in all tests (P < 0.05; effect sizes = 1.25–3.40). Deep overhead squat, in-line lunge, active straight leg raise and rotary stability test were significantly correlated to all performance tests. In-line lunge performance explained the greatest variance in reactive strength index (adjusted R² = 47%) and reactive agility cut (adjusted R² = 38%) performance, whilst maturation was the strongest predictor of squat jump performance (adjusted R² = 46%). This study demonstrated that variation of physical performance in youth soccer players could be explained by a combination of both functional movement screen scores and maturation.  相似文献   

Eduardo F. Mortimer and Charbel N. El-Hani: Conceptual Profiles: A Theory of Teaching and Learning Scientific Concepts     

Gregory J. Kelly 《Science & Education》2014,23(9):1957-1960

  相似文献   

Sevan G. Terzian. Science Education and Citizenship: Fairs,Clubs, and Talent Searches for American Youth, 1918–1958. New York: Palgrave MacMillan, 2013. 252 pp. Hardcover $95.00.     

Sally Gregory Kohlstedt 《History of education quarterly》2014,54(4):579-582

  相似文献   

Fostering self-monitoring of university students by means of a standardized learning journal—a longitudinal study with process analyses     

Sabine Fabriz  Charlotte Dignath-van Ewijk  Gregory Poarch  Gerhard Büttner 《European Journal of Psychology of Education - EJPE》2014,29(2):239-255

The self-regulation of learning behavior is an important key competence for university students. In this presented study, we aimed at fostering students’ self-regulation of learning by means of a standardized learning journal. In two of four courses that were included in the study, students had to keep a structured learning diary and/or received further intervention on self-regulated learning through a weekly course. Students who received these interventions were compared to students who received no treatment whatsoever in their self-regulation and learning achievement. The study reports pre–post measures as well as process analyses. Results revealed that keeping a structured learning diary without any further intervention did not improve students’ self-regulation. Those students who only kept learning diaries even showed a decrease in their motivation. Students who kept the learning diary and at the same time received further information on self-regulation showed increases in their strategy use and their self-efficacy. However, no improvements were found for students’ academic performance. It can be concluded that in order for students to profit in keeping a structured learning diary, they should be informed on the benefits of self-monitoring to increase their motivation.  相似文献   

Developing schools as professional learning communities： The TL21 experience     

Anthony Malone Gregory Smith 《美中教育评论》2010,7(9):106-114

Over the last 2 decades, Irish schooling and society have gone through a period of significant structural and policy-driven change. To meet the emerging needs of the knowledge/learning society, schools and teachers are challenged to develop their capacities as ＂active learning communities＂. This places greater demands on teachers and schools to reflect on their classroom practices, to utilise a wider repertoire of pedagogic styles more suited to the needs of the 21st century learners and so that meaningfully collaborate with their fellow professionals. Teaching and Learning for the 21st Century （TL21） was a 4-year （2003-2007） multi-pronged research and development project involving the Education Department at the National University of Ireland, Maynooth （NUIM） and 15 post-primary schools. The project sought to address a number of key aims in terms of developing schools as professional learning communities, including addressing the isolation and insulation which teachers can, and do experience in their day-to-day professional lives and prioritize quality in teaching and learning as a key challenge for school development planning. This paper attempts to succinctly frame the key developments and findings which emerged over the duration of this process.  相似文献   

Rounding the Regression     

Eric Marland  Michael J. Bossé  Gregory Rhoads 《PRIMUS》2018,28(3):187-205

Rounding is a necessary step in many mathematical processes. We are taught early in our education about significant figures and how to properly round a number. So when we are given a data set and asked to find a regression line, we are inclined to offer the line with rounded coefficients to reflect our model. However, the effects are not as insignificant as they might seem at first. In this paper, we investigate some consequences of rounding the coefficients in a least squares linear regression with respect to the calculated value of R², and consider ways to minimize the amount of error that can arise.  相似文献