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排序方式： 共有353条查询结果，搜索用时 15 毫秒
101.
Heidi Orloff Bryce Sumida Janna Chow Lalae Habibi Aaron Fujino Brian Kramer 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):238-247
The players' ability to achieve the greatest distance in kicking is determined by their efficiency in transferring kinetic energy from the body to the ball. The purpose of this study was to compare the kinetics and kinematics of the plant leg position between male and female collegiate soccer players during instep kicking. Twenty-three soccer players (11 males and 12 females) were filmed in both the sagittal and posterior views while performing a maximal instep kick. Plant leg kinetic data were also collected using an AMTI 1000 force platform. There were no significant differences between the sexes in plant leg position, but females had significantly greater trunk lean, plant leg angle, and medial-lateral ground reaction force than the males. Males showed higher vertical ground reaction forces at ball contact, but there were no significant differences in ball speed at take-off between the sexes. Ball speed at take-off was inversely related to peak anterior–posterior ground reaction force ( ? 0.65). The anatomical differences between the sexes were reflected in greater trunk lean and lower leg angle in the females. 相似文献
102.
T. Angeline G. Thiruvarutselvi W. Isabel Rita Mary Aruna Rama Devi Nirmala Jeyaraj 《Indian journal of clinical biochemistry : IJCB》2009,24(2):137-141
The prevalent Ala222Val single nucleotide polymorphism of the MTHFR gene has been shown to be associated with type II diabetes.
The objective of the present study was to find out whether there is genetic predisposition for development of acute myocardial
infarction in type II diabetes mellitus among South Indian Tamil population. PCR-based restriction enzyme analysis was performed
in DNA isolated from 120 acute myocardial infarction patients with diabetes mellitus and 100 non diabetic healthy individuals
with no documented cardiovascular diseases. The results indicate that the MTHFR 677TT genotype is absent in both case and
controls. The MTHFR 677CT genotype was observed among 32 (26.7 %) cases and 20 (20%) controls and the MTHFR 677CC genotype
among 88 (73.3%) cases and 80 (80%) controls. The allelic frequencies were in accordance to Hardy Weinberg equilibrium. There
was no statistical difference in genotype distribution between cases and controls. In conclusion, we suggest that the analysis
of MTHFR genotyping for C677T polymorphism alone need not be considered to find out whether there is genetic predisposition
for development of acute myocardial infarction in type II diabetes mellitus among South Indian Tamil population. 相似文献
103.
104.
In recent years, institutional review boards (IRBs) have become an increasingly significant part of the research process for communication scholars. This essay provides a rationale for scholarly examination of IRBs. Using the review process for this special issue as a case study, it identifies a number of ironies that provide justification for this special issue. 相似文献
105.
Rita Johnston 《Studies in Continuing Education》2013,35(1):56-66
This paper notes the recent rise in the number of courses, conferences, and publications devoted to the issue of ethics. It considers two different approaches to ethical training, one deduced from first philosophical principles of social ethics, and the other based on case studies of practical issues. The paper argues that a combination of both approaches is necessary to ensure situational applicability, whilst guarding against criticisms of moral relativism and expediency. In addition, the paper argues for an understanding of, and commitment to, personal integrity in professional practice. 相似文献
106.
The article presents the literacy achievement of Norwegian minority students, their reading habits, and their enjoyment of reading based on the Programme for International Student Assessment (PISA) 2000 study. Aspects of their family background and attitudes towards school are related to literacy achievement results. A comparison between Denmark, Sweden, Norway and Germany shows that the achievement gap between majority and minority students is larger in Denmark and Germany than in Norway and Sweden. A more detailed presentation of the Norwegian reading results shows that 35% of the Norwegian minority students perform at a level indicating that they are able to read in a technical sense, but they are unlikely to be able to use reading as an independent tool in acquiring knowledge and skills. The minority students' responses to questions about socio‐economic family background, reading habits, learning strategies and school motivation give a complex picture of their situation in Norwegian schools. The results indicate that there is some potential for equalising differences between minority students and majority students. 相似文献
107.
108.
Comparability between different educational qualifications is an important issue within policy discourse in the UK. In this context, the comparability of qualification demands has been explored through the use of expert human judgement. The involvement of human judgement in estimating assessment demands has consequences for methodology. This review considered the ways that the Kelly's Repertory Grid (KRG) technique has been used to compare assessment demands over recent years. The review involved the identification and analysis of research documents as well as consideration of the original theory on which the KRG method was founded. This article describes how the technique has been adapted as it has shifted from its original psychotherapeutic context to be used in educational assessment and comparability studies. The review also explored possible disadvantages that stem from these adaptations, leading to recommendations to ensure the validity of findings when using the technique in educational assessment studies. 相似文献
109.
110.
The present study explores the role negotiations and identity of volunteers at a large Southwestern pop-culture convention. A sensemaking perspective was used to understand how volunteers retrospectively interpret their experiences as volunteers in this temporary organization. Data collection included participant observation and interviews of 26 volunteers. Data were analyzed using constant comparative analysis. Three role negotiation categories were identified: learning roles, negotiating roles, and making sense of roles. Ineffective communication during role learning and negotiation created ambiguity and uncertainty for volunteers. Volunteers identified with the convention primarily through communicative interactions with patrons but also through communicating with staff or by wearing artifacts (e.g., clothing). Results suggest modifying sensemaking theory to recognize individual as well as collective sensemaking. 相似文献