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Igor Guisasola Iain James Ceri Llewellyn Victoria Stiles Sharon Dixon 《Sports Engineering》2009,12(2):99-109
The quasi-static testing of soils used in natural turf pitches yields key parameters in soil modelling, including elastic
moduli, Poisson’s ratio and Mohr–Coulomb parameters for shearing resistance and cohesion in soil. The bulk strength of a Sand
soil used in the construction of elite sports surfaces was found to increase initially and then decrease with increasing water
content due to apparent cohesion effects. For a Clay Loam soil, more common in recreational facilities, shear strength decreased
with water content. Reducing density resulted in a reduction of shear strength and elastic moduli in both soils due to reduced
packing of particles reducing particle–particle contact surface area. The effect of roots on the shear strength of a Sand
soil was not significant but reduced elastic moduli significantly. Horizontal forces measured during running and turning in
a biomechanics laboratory were in good agreement with forces predicted using a simple quasi-static soil model for coarse-grained
(Sand) soils although this was not the case with the Clay Loam soil. 相似文献
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Lynda Ayiku Thomas Hudson Ceri Williams Paul Levay Catherine Jacob 《Journal of the Medical Library Association》2021,109(4):583
Objective:We previously developed draft MEDLINE and Embase (Ovid) geographic search filters for Organisation for Economic Co-operation and Development (OECD) countries to assess their feasibility for finding evidence about the countries. Here, we describe the validation of these search filters.Methods:We identified OECD country references from thirty National Institute for Health and Care Excellence (NICE) guidelines to generate gold standard sets for MEDLINE (n=2,065) and Embase (n=2,023). We validated the filters by calculating their recall against these sets. We then applied the filters to existing search strategies for three OECD-focused NICE guideline reviews (NG103 on flu vaccination, NG140 on abortion care, and NG146 on workplace health) to calculate the filters'' impact on the number needed to read (NNR) of the searches.Results:The filters both achieved 99.95% recall against the gold standard sets. Both filters achieved 100% recall for the three NICE guideline reviews. The MEDLINE filter reduced NNR from 256 to 232 for the NG103 review, from 38 to 27 for the NG140 review, and from 631 to 591 for the NG146 review. The Embase filter reduced NNR from 373 to 341 for the NG103 review, from 101 to 76 for the NG140 review, and from 989 to 925 for the NG146 review.Conclusion:The NICE OECD countries'' search filters are the first validated filters for the countries. They can save time for research topics about OECD countries by finding the majority of evidence about OECD countries while reducing search result volumes in comparison to no filter use. 相似文献
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Educationalists have been concerned with the labelling and treatment of children with mental health difficulties in the education system in England for some time. These concerns have centred on the role of policy in ‘othering’ such students as deviant learners. The unprecedented number of children suffering from mental illnesses, has forced policymakers to address children’s mental health difficulties. This has involved the identification of a sub-set of the school population experiencing ‘less-severe’ mental health issues, to be addressed through a suite of policy interventions delivered by whole-school approaches, but targeted towards children situated as mentally ‘weak’. Drawing upon a Foucauldian theory of governmentality that addresses children’s behavioural motivations, an in-depth analysis of a number of educational policy initiatives related to mental health is conducted, that it is argued are fundamentally flawed. This analysis is followed by a discussion of the performative culture of High Stakes Testing in contributing to children’s mental health difficulties. Here it is argued that a narrative of mental weakness serves to justify a neoliberal rationality towards the treatment of children for whom the performative logic assumed to motivate all learners, fails. 相似文献
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The aims of this study were to describe and determine the test-retest reliability of an exercise protocol, the Loughborough Intermittent Shuttle Test (the LIST), which was designed to simulate the activity pattern characteristic of the game of soccer. The protocol consisted of two parts: Part A comprised a fixed period of variable-intensity shuttle running over 20 m; Part B consisted of continuous running, alternating every 20 m between 55% and 95% VO 2max , until volitional fatigue. Seven trained games players (age 21.5 +/- 0.9 years, height 182 +/- 2 cm, body mass 80.1 +/- 3.6 kg, VO 2max 59.0 +/- 1.9 ml kg -1 min -1 ; mean s x ) performed the test on two occasions (Trial 1 and Trial 2), at least7 days apart, to determine the test-retest reliability of the sprint times and running capacity. The physiological and metabolic responses on both occasions were also monitored. The participants ingested water ad libitum during the first trial, and were then prescribed the same amount of water during the second trial. The 15 m sprint times during Trials 1 and 2 averaged 2.42 +/- 0.04 s and 2.43 +/- 0.04 s, respectively. Run time during Part B was 6.3 +/- 2.0 min for Trial 1 and 6.1 +/- 1.3 min for Trial 2. The 95% limits of agreement for sprint times and run times during Part B were -0.14 to 0.12 s and -3.19 to 2.16 min respectively. There were no differences between trials for heart rate, rating of perceived exertion, body mass change during exercise, or blood lactate and glucose concentrations during the test. Thus, we conclude that the sprint times and the Part B run times were reproducible within the limits previously stated. In addition, the activity pattern and the physiological and metabolic responses closely simulated the match demands of soccer. 相似文献
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Suzanne F Grefsheim Susan C Whitmore Barbara A Rapp Jocelyn A Rankin Rex R Robison Candace C Canto 《Journal of the Medical Library Association》2010,98(2):147-156
Background:
To encourage evidence-based practice, an Annals of Internal Medicine editorial called for a new professional on clinical teams: an informationist trained in science or medicine as well as information science.Objectives:
The study explored the effects of informationists on information behaviors of clinical research teams, specifically, frequency of seeking information for clinical or research decisions, range of resources consulted, perceptions about access to information, confidence in adequacy of literature searches, and effects on decision making and practice. It also explored perceptions about training and experience needed for successful informationists.Methods:
Exploratory focus groups and key interviews were followed by baseline and follow-up surveys conducted with researchers and clinicians receiving the service. Survey data were analyzed with Pearson''s chi-square or Fisher''s exact test.Results:
Comparing 2006 to 2004 survey responses, the researchers found that study participants reported: seeking answers to questions more frequently, spending more time seeking or using information, believing time was less of an obstacle to finding or using information, using more information resources, and feeling greater satisfaction with their ability to find answers. Participants'' opinions on informationists'' qualifications evolved to include both subject knowledge and information searching expertise.Conclusion:
Over time, clinical research teams with informationists demonstrated changes in their information behaviors, and they valued an informationist''s subject matter expertise more.Highlights
- Informationist involvement in traditional team activities—going on rounds and searching and critically evaluating the literature—increased over time.
- As the relationship between a clinical team and informationist developed, activities expanded to include projects such as development of wikis, databases, and websites.
- Clinical teams came to view subject knowledge as key to an informationist''s preparation; however, their expertise as information scientists was valued most highly.
- “Initiative,” approaching research staff in their workplace, was the one personal trait focus group participants agreed on as most desirable for an informationist.
- When first introduced to the concept, researchers cited customization of services to team needs as a major benefit.
Implications
- To assure a successful informationist program, libraries must be prepared to commit time and money.
- Whether informationists or not, librarians should be prepared to support users'' increased need for genetics and molecular biology information.
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S. Benedetto F. Bernelli Zazzera P. Bertola M. Cantamessa S. Ceri C. Ranci 《European Journal of Engineering Education》2010,35(6):627-643
Politecnico di Milano and Politecnico di Torino, the top technical universities in Italy, united their efforts in 2004 by launching a unique excellence programme called Alta Scuola Politecnica (ASP). The ASP programme is devoted to 150 students, selected each year from among the top 5–10% of those enrolled in the Engineering, Architecture and Design MSc programmes at each institution. This paper reports on the original motivation, evolution, lessons learned, present status, results, challenges and perspectives of ASP. In particular, the issues related to the selection of the ASP class and to its multidisciplinary nature, the cultural track of ASP and also its sustainability in connection with its location inside the Milano-Torino framework will be highlighted. 相似文献
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Jessica J. Whitmore 《Journal Of Archival Organization》2018,15(3-4):145-158
AbstractThis case study describes the development and implementation of a three-credit undergraduate archival science course at Mount St. Mary’s University. Offered through the university’s Department of History, this course was designed to prepare students for positions in archives-related careers, unlike most research-based undergraduate archival electives. Benefits of the course to both students and the archivist profession will be discussed. 相似文献
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This paper uses an autoethnography to recount my experiences with SportHelp, a UK youth sports charity. Using a layered account format, which jumps through time and space, I demonstrate the extent to which neoliberal values have influenced the continuity and change of SportHelp. This paper does not constitute an attack on the charity, its staff, nor the charity sector. The focus is on how the wider neoliberal context shapes how SportHelp operates. The findings are analysed in terms of Foucault’s (2008, The birth of biopolitics. Lectures at the Collége de France, 1978–79. Basingstoke: Palgrave Macmillan) notion of governmentality by examining SportHelp’s monitoring and reporting practices, as well as the managers’ use of New Public Management discourse. The conclusion reflects on the extent to which neoliberal governmentality, though in some instances beneficial for SportHelp, ultimately does more harm than good. This paper, by offering an ‘insider’s view’, adds to the literature calling for a change in how policy makers and funders shape the current hypercompetitive socio-political landscape. Charities should be supported, not discouraged, to develop holistic programmes that move beyond ‘economic rationales’ and are capable of addressing the multifaceted needs of their service users. 相似文献