On the geometry of the smallest circle enclosing a finite set of points     

Lance D. Drager  Jeffrey M. Lee 《Journal of The Franklin Institute》2007,344(7):929-940

A number of numerical codes have been written for the problem of finding the circle of smallest radius in the Euclidean plane that encloses a finite set P of points, but these do not give much insight into the geometry of this circle. We investigate geometric properties of the minimal circle that may be useful in the theoretical analysis of applications. We show that a circle C enclosing P is minimal if and only if it is rigid in the sense that it cannot be translated while still enclosing P. We show that the center of the minimal circle is in the convex hull of P. We use this rigidity result and an analysis of the case of three points to find sharp estimates on the diameter of the minimal circle in terms of the diameter of P.  相似文献   

A summer program designed to educate college students for careers in bioinformatics     

Krilowicz B  Johnston W  Sharp SB  Warter-Perez N  Momand J 《CBE life sciences education》2007,6(1):74-83

A summer program was created for undergraduates and graduate students that teaches bioinformatics concepts, offers skills in professional development, and provides research opportunities in academic and industrial institutions. We estimate that 34 of 38 graduates (89%) are in a career trajectory that will use bioinformatics. Evidence from open-ended research mentor and student survey responses, student exit interview responses, and research mentor exit interview/survey responses identified skills and knowledge from the fields of computer science, biology, and mathematics that are critical for students considering bioinformatics research. Programming knowledge and general computer skills were essential to success on bioinformatics research projects. General mathematics skills obtained through current undergraduate natural sciences programs were adequate for the research projects, although knowledge of probability and statistics should be strengthened. Biology knowledge obtained through the didactic phase of the program and prior undergraduate education was adequate, but advanced or specific knowledge could help students progress on research projects. The curriculum and assessment instruments developed for this program are available for adoption by other bioinformatics programs at http://www.calstatela.edu/SoCalBSI.  相似文献   

12. Educational politics and policy: and the game goes on     

Jay D. Scribner  Pedro Reyes  Lance D. Fusarelli 《教育政策杂志》2013,28(5):201-212

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School Reform in a Vacuum: Demographic Change,Social Policy,and the Future of Children     

Lance D. Fusarelli 《Peabody Journal of Education》2013,88(3):215-235

In their search for magic bullets to fix failing schools, policymakers seldom directly address powerful ecological factors impacting schooling. This article identifies several major demographic, societal, economic, and educational changes and trends in U.S. society over the past several years; analyzes their impact on schoolchildren; and offers a series of policy recommendations for public sector reform initiatives that show promise in ameliorating these conditions, which in turn would improve the educational prospects for all children, particularly those most at risk.  相似文献   

The human genome and sport, including epigenetics and athleticogenomics: a brief look at a rapidly changing field     

Sharp NC 《Journal of sports sciences》2008,26(11):1127-1133

Since Hugh Montgomery discovered the first of what are now nearly 200 "fitness genes", together with rapid advances in human gene therapy, there is now a real prospect of the use of genes, genetic elements, and/or cells that have the capacity to enhance athletic performance (to paraphrase the World Anti-Doping Agency's definition of gene doping). This overview covers the main areas of interface between genetics and sport, attempts to provide a context against which gene doping may be viewed, and suggests a futuristic legitimate use of genomic (and possibly epigenetic) information in sport.  相似文献   

Corporate religion     

Colin Sharp M.A. 《British Journal of Religious Education》1935,2(3):144-153

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When worlds collide: identity,culture and the lived experiences of research when ‘teaching-led’     

John G. Sharp  Brian Hemmings  Russell Kay  Carol Callinan 《Journal of Further & Higher Education》2015,39(5):612-644

This article presents detailed findings from the qualitative or interpretive phase of a mixed-methods case study focusing on the professional identities and lived experiences of research among six lecturers working in different capacities across the field of education in a ‘teaching-led’ higher education institution. Building upon the quantitative phase published earlier in this journal, factors both facilitating (e.g. research infrastructure, support for doctoral study) and constraining (e.g. time, space, workload, critical mass, ‘practitioner bond professionalism’, ‘organisational socialisation’, networks, roles and responsibilities, power relationships) research activity are identified. These are considered in the context of an institution often recruiting staff with ‘non-traditional’ backgrounds from within ‘the professions’ (e.g. from schools and colleges without doctorates) looking to become more ‘research-informed’ and establish a more vibrant and sustainable research culture. Recommendations for further development focus on ‘identity transitions’ and ‘cultural transformation’, emphasising the importance of research leadership and its distribution throughout the organisation. With current trends towards the apparent intensification and prioritisation of research activity over teaching, findings are considered particularly important for institutions of a similar nature to the one described here, for education departments in larger institutions also on similar journeys, and in light of an anticipated increase in demand for research activity arising from the expansion of higher education provision in further education and the private sector, where recruitment from within ‘the professions’ to teach across ‘vocational’ programmes is common.  相似文献   

Promoting Emotional Literacy: Emotional Literacy Improves and Increases Your Life Chances     

Peter Sharp 《Pastoral Care in Education》2000,18(3):8-10

Peter Sharp, an Educational Psychologist, explains how Daniel Goleman's best selling book focused his interest on the idea of emotional literacy; how he found that interest was shared by Southampton's Education Services Chief Inspector and that, as a result of this, emotional literacy became one of the Authority's priorities. The wide range of initiatives currently taking place in Southampton are described as the broad way in which the concerns of emotional literacy are interpreted. The Southampton approach has already created interest among other LEAs and there are plans to produce supportive materials. The paper concludes by suggesting the way in which schools might start work in this area.  相似文献   

Examining preservice teacher content and pedagogical content knowledge needed to teach reading in elementary school          下载免费PDF全文

Sarah K. Clark  Sara R. Helfrich  Lance Hatch 《Journal of Research in Reading》2017,40(3):219-232

Recently, increased attention has been placed on the importance of having knowledgeable and skilled teachers in order to influence reading achievement. Yet many international reports suggest that large numbers of children are not learning to read. How can we better prepare teachers with the necessary knowledge to teach reading? The current study examined the reading instructional knowledge of elementary education preservice teachers (N = 87) from two teacher education programmes. Programme A required five reading methods courses and Programme B required two methods courses. Findings indicate that the preservice teachers presented fairly robust levels of knowledge in the areas of phonological awareness, phonics, comprehension and vocabulary. However, we found statistically significant differences in knowledge based on the programme attended and the number of courses completed. Suggestions for improving reading teacher education are provided.  相似文献   

Editorial     

Alex de Voogt  Lance Miller 《Learning & behavior》2017,45(4):329-329

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