Three-dimensional kinematic analysis of the golf swing using instantaneous screw axis theory,Part 2: golf swing kinematic sequence     

Alessandro Vena  Dave Budney  Tom Forest  Jason P. Carey 《Sports Engineering》2011,13(3):125-133

A number of recent studies have measured the extent and timing of segment rotation during the golf swing. A promising technique, instantaneous screw axis (ISA) theory, could provide a better expression of segment rotation. In Part 1 of this two-part study, the objectives are to identify the ISA of the pelvis, shoulders and left arm during the downswing, compute segment angular velocity relative to that segment’s ISA and verify that ISA theory is a valid tool to analyse segment rotation during the golf swing. Results indicate that for all subjects, at least 71% of marker velocity is a result of rotation about their respective ISA, when averaging results over the duration of the downswing, confirming that motion is primarily rotational. Furthermore, ISA position and orientation of each segment approaches, on average, the expected gross axis of rotation, confirming that motion about the ISA is representative of joint motion.  相似文献   

足球运动员整体训练系统基础     

B.Π古巴  A.B.列克沙科夫 《首都体育学院学报》2011,23(1):1-5

对足球运动员在长期训练过程中身体准备的综合体系进行了分析。长期的研究结果表明,足球运动训练可以被划分为4个方面:1)单纯性身体活动的使用,2)不同目标训练过程的交替使用,3)较小训练周期固定结构的保留并作为训练过程的基础,4)专门性推动能力的有序发展。这4个方面可以有效地解决足球运动员全面身体准备的问题。  相似文献   

Bowling ball dynamics revealed by miniature wireless MEMS inertial measurement unit   总被引：1，自引：1，他引：0  

Kevin King  N. C. Perkins  Hugh Churchill  Ryan McGinnis  Ryan Doss  Ron Hickland 《Sports Engineering》2011,13(2):95-104

This paper presents a novel sensor technology to deduce the dynamics of a bowling ball. The sensor, a miniature wireless inertial measurement unit (IMU), incorporates MEMS accelerometers and angular rate gyros, a microcontroller, a low power RF transceiver, and a rechargeable battery. When embedded in a bowling ball, the IMU transmits the acceleration and angular velocity data that define the dynamics of the ball starting with the bowler’s delivery and its motion in the lane. Example results from professional bowlers illustrate how this technology can be used to assess bowler skill and ball performance. For instance, the IMU accurately measures the spin dynamics of the ball which are crucial to develop the ball “hook.” An analysis of ball dynamics in the lane is distilled to a measurable “hook potential” metric for further assessing bowler skill. Finally, the sensor presented herein is believed to be the world’s smallest, wireless IMU. This highly miniaturized and wireless design will enable parallel training systems for many sports, including basketball, baseball, crew, cricket, golf, fly fishing, soccer, softball, tennis, rowing, among others.  相似文献   

The information needs of users of scientific libraries     

N. A. Slashcheva  S. A. Vlasova  N. V. Mironova 《Scientific and Technical Information Processing》2011,38(4):258-264

This paper reflects the results of the analysis of user information needs that was carried out by the Library of Natural Sciences of the Russian Academy of Sciences (LNS RAS) for the purpose of gathering information on the quality of a reference-bibliographic and information service for specialists of the RAS in the subject of their studies.  相似文献   

Distributed knowledge acquisition for the automatic construction of integrated expert systems     

G. V. Rybina  A. O. Deineko 《Scientific and Technical Information Processing》2011,38(6):428-434

The authors discuss the problem of distributed knowledge acquisition for the construction of complete and consistent databases in integrated expert systems via the sharing of knowledge sources of different topologies (experts, problem-oriented texts, and electronic media in the form of databases). The emphasis is on the models, methods, and algorithms of distributed knowledge acquisition from databases as additional knowledge sources. The authors describe the architecture and basic facilities of distributed knowledge acquisition, which function as a part of the AT-TECHNOLOGY tool complex.  相似文献   

Out on the Web: The Relationship between Campus Climate and GLBT-related Web-based Resources in Academic Libraries     

Matthew P. Ciszek 《The Journal of Academic Librarianship》2011,37(5):430-436

This article explores the relationship between the perceived campus environment for gay, lesbian, bisexual, and transgender (GLBT) students at colleges and universities and how academic libraries have deployed GLBT-related resources on the Web. Recommendations are made for increasing GLBT-related materials and information in academic libraries.  相似文献   

Analysis of the efficiency of applying artificial neuron networks for solving recognition,compression, and prediction problems     

A. A. Talalaev  I. P. Tishenko  V. P. Fralenko  V. M. Khachumov 《Scientific and Technical Information Processing》2011,38(5):313-321

The paper summarizes the experience of developing the PS ANN image recognition software system based on artificial neural networks (ANNs). The real abilities of neural networks to solve image recognition, data compression, and extrapolation problems are demonstrated. The results of experimental studies on accelerating parallel task computations are presented.  相似文献   

The formation of information and analytical systems as a part of the common information space of the innovative sphere     

J. J. Vasileva 《Scientific and Technical Information Processing》2011,38(4):243-250

The problem of the necessity of creating an effective means of access to information resources and their management in the innovative sphere under conditions of the formation of a common information space is described. The model of an information and analytical system at the regional level is suggested as a solution and the methodological approaches and requirements for setting up such a system are defined. The architecture and logic of functioning of the regional information and analytical system of innovative sphere is reviewed.  相似文献   

An approach to computer-assisted prediction of the development of international conflicts     

M. N. Kotov 《Scientific and Technical Information Processing》2011,38(2):78-82

This work considers the topic of international conflict (IC) analysis and examines a number of present approaches to their analysis. The developed IC phase-factor model and a general scheme for predicting IC development directions are described.  相似文献   

Innovation informatization for state financial control bodies   总被引：1，自引：0，他引：1  

A. Ya. Bystryakov  V. V. Mizintseva 《Scientific and Technical Information Processing》2011,38(2):69-77

The lack of a unified system of innovative information support of the activity of state bodies and at the same time the need for quick, qualified, and motivated decisions determine the role of informatization for bodies of state financial control (SFC). The article considers the basic features of information supply to SFC bodies and the requirements imposed on information in the financial sphere; the basic objectives and problems of information supply; risks and problems in the process of informatization in the SFC system; and the ways to deal with the existing problems within the Unified Information Space to be formed in accordance with the Electronic State and the Efficiency of State Governance program (by 2015).  相似文献