跑步再训练对髌股疼痛综合征跑者髌股关节压力的影响     

祁钰杰  王琳 《浙江体育科学》2021,(2):105-112

跑步运动损伤的发生率很高,其中髌骨疼痛综合征是最常见的膝关节损伤疾病。通过改变跑步时跑者的落地模式和步频来修正异常的下肢生物力学目前受到越来越多学者的关注。研究目的为针对跑步再训练后跑者髌股关节应力的变化,综述跑步再训练后跑者髌股关节生物力学变化的研究和进展。目前研究已证实通过改变跑步落地模式和步频能够对髌股关节生物力学产生影响,但是针对患有髌骨疼痛综合征跑者的即刻效应的研究较少,且对于同时改变步频和落地模式的效果存在一定争议,未来需进一步探讨髌骨疼痛综合征跑者的跑步再训练效果。  相似文献   

论文献保障率     

游丽华 《图书馆论坛》2012,32(3):109-112

分析在数字化信息环境下传统的文献保障率存在的诸多局限性的基础上,提出用文献信息资源的有效投入来描述文献保障程度。认为用文献保障度来替代文献保障率更有其科学合理性,并给出了计算公式。  相似文献   

Influence of motivational design on completion rates in online self‐study pharmacy‐content courses     

Amy Pittenger  Aaron Doering 《Distance Education》2010,31(3):275-293

Student retention rates are a constant concern in higher education, but this concern has become especially challenging as online courses become more common and there are widespread reports of low completion rates for online, self‐study courses. We evaluated four self‐study online pharmacy courses with a history of very high completion rates for motivational design features, as an explanation for the difference in completion rates between these classes and those reported in the literature. The validated Instructional Materials Motivation Survey [IMMS] (Keller, 1987) and an open‐ended survey based on Keller’s (1987) ARCS components were used to assess the design and instructional materials of these courses for motivational influence. Specifically, the ARCS components of attention, relevance, confidence, and satisfaction were measured and then compared. Findings suggest that the extent and type of educational scaffolding does impact the motivational effectiveness of self‐study, in online pharmacy‐content courses.  相似文献   

A recipe for effective participation rates for web‐based surveys     

Lorraine Bennett 《Assessment & Evaluation in Higher Education》2010,35(4):357-365

One way many universities have approached the process of better understanding and meeting the needs of their students is through student evaluations. The evaluation data provide not only diagnostic feedback but also useful information in terms of the quality of learning and teaching experiences. In an effective quality cycle, the data gathered are analysed and used to make improvements. This is often referred to as ‘closing the loop’. However, for any evaluation data to be of value an important prerequisite for ‘closing the loop’ is that response rates should be sufficiently high to be representative of the student cohort. This paper describes how a faculty within Monash University utilising only web based surveys developed a successful communication strategy to elicit staff and student participation in the unit (subject) evaluation process which achieved a response rate as high as 83.2%.  相似文献   

利率决定与利率弹性:一种可能的解释     

肖殿荒 《华中师范大学学报(人文社会科学版)》2001,40(4):78-81

抽象的自然利率终属于虚乌有，而在一定的社会经济条件下，却存在适度的、可行的利率区间。利率问题的重要性主要在于利率变化通过供给和需求渠道影响产出的可能性，但理论和经验研究皆显示，中国总需求以及产了同的利率弹性很不显。因此，在目前经济发展与体制背景下，中国利率体制的重构应该注意两个方面：第一，将利率保持在均衡区间，适时调整以与经济系统其他方面主要包括价格走势、货币市场、资本市场和外汇市场相协调。第二，利率杠杆不宜作为调节短期需求的手段，而应该充当体现国家政策和体制的中长期导向性工具。  相似文献   

What response rates are needed to make reliable inferences from student evaluations of teaching?     

Abdel Azim Zumrawi  Simon P. Bates 《Educational Research and Evaluation》2014,20(7-8):557-563

This paper addresses the determination of statistically desirable response rates in students’ surveys, with emphasis on assessing the effect of underlying variability in the student evaluation of teaching (SET). We discuss factors affecting the determination of adequate response rates and highlight challenges caused by non-response and lack of randomization. Estimates of underlying variability were obtained for a period of 4?years, from online evaluations at the University of British Columbia (UBC). Simulations were used to examine the effect of underlying variability on desirable response rates. The UBC response rates were compared to those reported in the literature. Results indicate that small differences in underlying variability may not impact desired rates. We present acceptable response rates for a range of variability scenarios, class sizes, confidence level, and margin of error. The stability of estimates observed at UBC, over a 4-year period, indicates that valid model-based inferences of SET could be made.  相似文献   

当前推进利率市场化改革所存在的风险及对策分析     

李小渝  胡建国 《鸡西大学学报》2013,(10):49-51

当前,进一步推进以利率市场化为核心的金融体制改革,对我国的社会经济发展具有极其重要的意义。分析了面临的风险,就如何推进利率市场化,在借鉴国际成功经验、推进银行经营体制改革、建立与之相适应的货币政策操作体系、改善国有企业的经营管理并防范其经营风险、构建宏观审慎监管框架等方面提出了对策建议。  相似文献   

Simple shear endochronic equations for finite plastic deformation     

JIANG Wugui  FU Mingfu  CHEN Liangsen  GENG Shiqi Department of Materials Science  Engineering  Nanchang Institute of Aeronautical Technology  Nanchang  Jiangxi  P.R. China Institute of Engineering Mechanics  Nanchang University  Nanchang  Jiang 《重庆大学学报(英文版)》2004,3(1):78-81

~~6.ConclusionsJaumannsrate,FusrateandWusratewereincorporatedintotheendochronicequationstoanalyzesimpleshearfinitedeformation.Incrementalequationsandnumericalsolutionsarepresentedforthreeendo-chronicobjectivemodels.TheresultsshowthatanoscillatoryshearstressresponsetoamonotonicallyincreasingshearstrainoccurswhentheJaumannsrateobjectivemodelisemployedforendochronicmaterials.Theoscillatoryresponseisdependentontheadoptedobjectiverate.ComparedwiththeJaumannsrate,theFusrateandtheWusratesatisfythe…  相似文献   

中美社会经济发展阶段与煤矿安全事故的相关性比较研究     

戚安邦  顾静 《未来与发展》2011,34(2):29-35,46

煤矿安全事故水平高低与一个国家工业发展的基础水平和速度等因素密切相关,是一国社会经济发展阶段和水平的反映。本文通过研究和编制中关两国几十年来煤矿安全事故百万吨死亡率的曲线．分析了中关社会经济发展阶段以及历程与煤矿安全事故的相关性,比较研究了中关两国煤矿安全事故水平、曲线规律的异同点及其原因。这不仅在我国煤矿安全问题的研究广度上加入了宏观经济发展的全新维度。使人们能够更为全面地认识我国煤矿安全事故的成因,也为我国在不同经济发展阶段下安排应对和防范煤矿安全事故提供了科学的依据。  相似文献   

Establishment of higher education institutions and new firm entry   总被引：1，自引：0，他引：1  

Rui Baptista  Francisco Lima  Joana Mendonça 《Research Policy》2011,40(5):751-760

The presence of universities has generally been associated with technological entrepreneurship. But what is the real impact of new universities on the levels of firm creation in a region? The present paper uses policy evaluation methodologies and longitudinal data on the establishment of higher education institutions in Portuguese municipalities for the period 1992-2002 to examine its effect on entry rates of new firms in different sectors. We find that the establishment of a new university has a positive and significant effect on subsequent levels of knowledge based firm entry in municipalities, and a negative effect on the levels of entry in other sectors, such as low-tech manufacturing.  相似文献