Characteristics of the start in women's World Cup skeleton     

Nicola Bullock  David T. Martin  Angus Ross  Doug Rosemond  Terry Holland  Frank E. Marino 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):351-360

This study characterizes key elements of the start in elite female World Cup skeleton athletes. The top 20 female competitors in three World Cup races were videotaped within a calibrated space to allow the following components of the start to be quantified: (1) acceleration (velocity at 15-m mark, time to 15-m mark), (2) capacity (time to load, total number of steps to load), and (3) load (velocity at 45-m mark). A correlation analysis was used to establish the relationship between the variables of interest and overall start time (15- to 65-m mark). Velocity at the 15-m mark accounted for 86% of the variance in overall start time at St. Moritz and 85% at Sigulda. A stepwise regression analysis revealed that approximately 89% of the variation in start time could be explained by velocity at the 15-m mark, time to load, and velocity at the 45-m mark. Of the variables analysed in this study, rapid acceleration to attain a high velocity at the 15-m mark was the most important component of a fast overall start time. The importance of the time to load and velocity at the 45-m mark vary according to the different track characteristics.  相似文献   

Negotiating Professional Identity Construction during Regulatory Change: Utilizing a Virtual Focus Group to Understand the Outlook of Canadian Counsellors     

Kate Gignac  Nicola Gazzola 《International journal for the advancement of counseling》2016,38(4):298-318

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Becoming a guidance counsellor in Ontario: formative influences from counsellors’ perspective     

Daniel Nadon  André Samson  Nicola Gazzola  Anne Thériault 《International Journal for Educational and Vocational Guidance》2016,16(3):363-377

Contrary to guidance counsellors elsewhere in North America who hold a master’s degree, career and guidance counselling services in secondary schools in Ontario are delivered by teachers who have completed additional undergraduate studies. Guidance counsellors are pivotal components of the school as they complete tasks that promote students’ overall development. The aim of this qualitative study was to explore how teachers perceive and describe the process of becoming guidance counsellors in Ontario. The thematic analysis revealed four major themes that articulated the process of becoming a guidance counsellor in Ontario: peer guidance, contextual factors, professional experience, and theoretical knowledge.  相似文献   

Health Sciences Librarians' Research on Medical Students' Use of Information for Their Studies at The Medical School,University of Queensland,Australia     

Kaye E. Lasserre  Nicola Foxlee  Lisa Kruesi  Julie Walters 《Medical reference services quarterly》2013,32(2):141-157

This study reports the findings of research undertaken by health sciences librarians at the University of Queensland Library into how medical students use information for their studies, particularly resources and services provided by the Library. The methods utilized were an online survey and focus groups. Results indicated that students favor print resources over electronic, value accessing resources on a one-stop basis, and prefer training to be delivered flexibly. The implication of these results for future resource selection, service provision, and instructional design and delivery is discussed.  相似文献   

Using Decision Tree Analysis to Understand Foundation Science Student Performance. Insight Gained at One South African University     

Nicola Frances Kirby  Edith Roslyn Dempster 《International Journal of Science Education》2013,35(17):2825-2847

The Foundation Programme of the Centre for Science Access at the University of KwaZulu-Natal, South Africa provides access to tertiary science studies to educationally disadvantaged students who do not meet formal faculty entrance requirements. The low number of students proceeding from the programme into mainstream is of concern, particularly given the national imperative to increase participation and levels of performance in tertiary-level science. An attempt was made to understand foundation student performance in a campus of this university, with the view to identifying challenges and opportunities for remediation in the curriculum and processes of selection into the programme. A classification and regression tree analysis was used to identify which variables best described student performance. The explanatory variables included biographical and school-history data, performance in selection tests, and socio-economic data pertaining to their year in the programme. The results illustrate the prognostic reliability of the model used to select students, raise concerns about the inefficiency of school performance indicators as a measure of students' academic potential in the Foundation Programme, and highlight the importance of accommodation arrangements and financial support for student success in their access year.  相似文献   

Intersectional work and precarious positionings: Black middle-class parents and their encounters with schools in England     

Carol Vincent  Nicola Rollock  Stephen Ball  David Gillborn 《International Studies in Sociology of Education》2013,23(3):259-276

This paper reports on data drawn from a study exploring the educational strategies of 62 Black Caribbean heritage middle-class parents. In this paper, we consider the respective roles of race and class in the shaping of parents’ educational strategies, deploying an analysis that focuses on their intersection and seeks to hold both race and class in productive tension. Drawing on empirical data, we illustrate how parents’ classed and raced identities shape their interactions with school staff.  相似文献   

Design and optimization of a double-enzyme glucose assay in microfluidic lab-on-a-chip     

Yegermal Tesfaw Atalay  Daan Witters  Steven Vermeir  Nicolas Vergauwe  Pieter Verboven  Bart Nicola?  Jeroen Lammertyn 《Biomicrofluidics》2009,3(4)

An electrokinetic driven microfluidic lab-on-a-chip was developed for glucose quantification using double-enzyme assay. The enzymatic glucose assay involves the two-step oxidation of glucose, which was catalyzed by hexokinase and glucose-6-phosphate dehydrogenase, with the concomitant reduction of NADP⁺ to NADPH. A fluorescence microscopy setup was used to monitor the different processes (fluid flow and enzymatic reaction) in the microfluidic chip. A two-dimensional finite element model was applied to understand the different aspects of design and to improve the performance of the device without extensive prototyping. To our knowledge this is the first work to exploit numerical simulation for understanding a multisubstrate double-enzyme on-chip assay. The assay is very complex to implement in electrokinetically driven continuous system due to the involvement of many species, which has different transport velocity. With the help of numerical simulation, the design parameters, flow rate, enzyme concentration, and reactor length, were optimized. The results from the simulation were in close agreement with the experimental results. A linear relation exists for glucose concentrations from 0.01 to 0.10 g l⁻¹. The reaction time and the amount of enzymes required were drastically reduced compared to off-chip microplate analysis.  相似文献   

Technology as Play     

Nicola Yelland 《Early Childhood Education Journal》1999,26(4):217-220

The role of play in young children's learning has always been considered to be of primary importance. Thus, early childhood programs have been characterized by curricula that provide plenty of opportunity for young children to play and interact with materials, ideas, and people. As we approach the new millennium, the impact of the new information technologies on play and as play, for young children need to be conceptualized and discussed. This article begins that discussion. The view that there are opportunities for young children to play in technological environments as well as with traditional materials and contexts is presented.  相似文献   

Expressive Vocabulary Predicts Nonverbal Executive Function: A 2-year Longitudinal Study of Deaf and Hearing Children     

Anna Jones  Joanna Atkinson  Chloe Marshall  Nicola Botting  Michelle C. St Clair  Gary Morgan 《Child development》2020,91(2):e400-e414

Numerous studies suggest an association between language and executive function (EF), but evidence of a developmental relationship remains inconclusive. Data were collected from 75 deaf/hard-of-hearing (DHH) children and 82 hearing age-matched controls. Children were 6–11 years old at first time of testing and completed a battery of nonverbal EF tasks and a test of expressive vocabulary. These tasks were completed again 2 years later. Both groups improved their scores on all tasks over this period. DHH children performed significantly less well than hearing peers on some EF tasks and the vocabulary test at both time points. Cross-lagged panel models showed that vocabulary at Time 1 predicted change in EF scores for both DHH and hearing children but not the reverse.  相似文献   

Inside or outside the IP system? Business creation in academia     

Riccardo Fini  Nicola Lacetera  Scott Shane 《Research Policy》2010,39(8):1060-1069

Research and public policy on academic entrepreneurship are largely based on the assumption that faculty members start businesses to commercialize inventions that have been disclosed to university administrators and have been patented. In this paper, we analyze a sample of 11,572 professors and find that much academic entrepreneurship occurs outside the university intellectual property system. Specifically, about 2/3 of businesses started by academics are not based on disclosed and patented inventions. Moreover, we show that individual characteristics, departmental and organizational affiliations, and time allocation of academics that have started business outside the IP system are different from those of academics that have started businesses to exploit disclosed and patented inventions. We discuss the implications for research on and the practice of academic entrepreneurship.  相似文献