Sports Technology最新文献_第9页

Aerodynamics of ski jumping suits 滑雪跳台服的空气动力学

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725411

H. Chowdhury, H. Moria, F. Alam, A. Subic

引用次数: 8

Identification of key performance parameters during off-spin bowling with a smart cricket ball 智能板球离旋投球关键性能参数的识别

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.726225

F. Fuss, N. Lythgo, Robert Smith, A. Benson, B. Gordon

引用次数: 22

Aerodynamic behaviour of stretchable sports fabrics 可拉伸运动织物的空气动力学特性

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725412

H. Moria, H. Chowdhury, F. Alam, A. Subic

{"title":"Aerodynamic behaviour of stretchable sports fabrics","authors":"H. Moria, H. Chowdhury, F. Alam, A. Subic","doi":"10.1080/19346182.2012.725412","DOIUrl":"https://doi.org/10.1080/19346182.2012.725412","url":null,"abstract":"The variable surface characteristics of sports fabrics can affect the aerodynamics of athletes. In speed sports, most sports garments are worn with reasonable stretches that alter the fabrics' surface morphology. However, no correlation between the stretches and aerodynamic parameters is reported in the open literature. Therefore, the primary objective of this paper is to measure the aerodynamic properties of three commercially available sports fabrics over a range of Reynolds numbers and stretch conditions. Aerodynamic parameters of each fabric under a range of applied stretches were measured experimentally. The findings indicate that the surface morphology of the fabric under tension changes significantly and also affects the aerodynamic behaviour of the fabric. Less stretched knitted fabrics can provide an aerodynamic advantage by reducing drag at higher speeds, while more stretched knitted fabrics can provide an aerodynamic advantage by reducing drag at lower speeds. As the surface roughness increases, the critical Reynolds number (Recrit ) decreases and the minimum drag coefficient (C Dmin) value increases. Using same fabric under different tensions, the aerodynamic drag can be reduced up to 40% compared to a smooth-surface fabric.","PeriodicalId":237335,"journal":{"name":"Sports Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123246529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

An integrated swimming monitoring system for the biomechanical analysis of swimming strokes 用于游泳动作生物力学分析的综合游泳监测系统

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725410

D. James, R. Leadbetter, Madhusudan Rao Neeli, B. Burkett, D. Thiel, James B. Lee

{"title":"An integrated swimming monitoring system for the biomechanical analysis of swimming strokes","authors":"D. James, R. Leadbetter, Madhusudan Rao Neeli, B. Burkett, D. Thiel, James B. Lee","doi":"10.1080/19346182.2012.725410","DOIUrl":"https://doi.org/10.1080/19346182.2012.725410","url":null,"abstract":"This paper describes the development of a complete wearable swimming system for performance analysis, together with a sample application. The system comprises wearable nodes, data processing tools in MATLAB™ and integration with video. The swimming nodes are small in size and designed to be worn on body segments of interest, typically lower leg, lower arm, and the sacral or cervical regions. Each node contains inertial sensors, screen, data storage and RF communications for synchronisation and data download. The device is controlled using a microcontroller with a scheduler-based operating system to conserve power and is custom-packaged with a user interface and USB port that is fully waterproof. The cost of manufacture is a few hundred dollars in small-run quantities. The developed analysis software builds upon previously developed tools, can communicate with the nodes individually and can synchronise the recording of multiple units through a custom-developed protocol. Video is integrated into the developed tools as a method of presenting the sensor data alongside a more traditional analysis tool. A case study of the system analyses swim stroke phase with video and demonstrates the utility of the system as a tool for temporal stroke phase identification in the high-performance environment.","PeriodicalId":237335,"journal":{"name":"Sports Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125569148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 58

Detection of throwing in cricket using wearable sensors 使用可穿戴传感器检测投掷板球

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725409

A. Wixted, M. Portus, W. Spratford, D. James

{"title":"Detection of throwing in cricket using wearable sensors","authors":"A. Wixted, M. Portus, W. Spratford, D. James","doi":"10.1080/19346182.2012.725409","DOIUrl":"https://doi.org/10.1080/19346182.2012.725409","url":null,"abstract":"One of the great controversies of the modern game of cricket is the determination of whether a bowler is using an illegal throw-like bowling action. Changes to the rules of cricket have reduced some of the confusion; yet, because of the complexities of the biomechanics of the arm, it is difficult for an umpire to make a judgement on this issue. Expensive laboratory-based testing has been able to quantify the action of a bowler and this testing is routinely used by cricket authorities to assess a bowling action. Detractors of the method suggest that it is unable to replicate match conditions, has long lead times for assessment and is only available to the elite. After extensive laboratory validation, we present a technology and method for an in-game assessment using a wearable arm sensor for differentiating between a legal bowling action and throwing. The method uses inertial sensors on the upper and lower arms that do not impede the bowling action. Suspect deliveries, as assessed by an expert biomechanist using high-speed video and motion capture, reveal valid distinctive inertial signatures. The technology is an important step in the monitoring of bowling action on-field in near real-time. The technology is suitable for use in competition as well as a training tool for developing athletes.","PeriodicalId":237335,"journal":{"name":"Sports Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127872851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Quantifying and assessing biomechanical differences in swim turn using wearable sensors 使用可穿戴传感器量化和评估游泳转弯的生物力学差异

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725171

James B. Lee, R. Leadbetter, Y. Ohgi, D. Thiel, B. Burkett, D. James

引用次数: 17

Table of Contents Volume 4, Numbers 3-4 目录第四卷，第3-4号

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2011.735889

引用次数: 0

Technological foundations and current status of a modified, low-risk form of competitive boxing (Box'Tag®) 一种改良的、低风险的竞技拳击形式(Box'Tag®)的技术基础和现状

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725413

A. Hahn, R. Helmer, C. Mackintosh, Laurie Staynes, I. Blanchonette

{"title":"Technological foundations and current status of a modified, low-risk form of competitive boxing (Box'Tag®)","authors":"A. Hahn, R. Helmer, C. Mackintosh, Laurie Staynes, I. Blanchonette","doi":"10.1080/19346182.2012.725413","DOIUrl":"https://doi.org/10.1080/19346182.2012.725413","url":null,"abstract":"Boxing-related activities are commonly used for fitness enhancement, but for many people fear of injury precludes participation in competitive boxing. Over the past six years, technological developments have contributed to the emergence in Australia of a modified, low-risk form of competitive boxing called Box'Tag®. The rules of Box'Tag® prohibit impacts to the head and any impacts above a moderate level of force. Contestants wear instrumented equipment that, in combination with a dedicated software package, allows automated impact detection and real-time display of scores. Participatory action research methods are being used to guide iterative technology refinements, with success evaluated based on feedback obtained through constant, direct interaction with the technology end-users. In concert with technological advances, the popularity of Box'Tag® is steadily increasing, with programmes now established in three Australian states and about to be initiated elsewhere. Box'Tag® is attracting demographically diverse participation and injury rates are low. Physiological and perceptual data recorded during contests show Box'Tag® to be a highly intensive activity and an excellent vehicle for building physical fitness. There is scope for further technological improvements, but the Box'Tag® initiative is already demonstrating potential to add a new dimension to boxing and has been adopted by Australian boxing authorities.","PeriodicalId":237335,"journal":{"name":"Sports Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134642847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Accelerometer measures of field hockey skills development 加速计测量曲棍球技术的发展

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.725408

M. Tremayne, D. Thiel, Sophie Isabelle Nottle

{"title":"Accelerometer measures of field hockey skills development","authors":"M. Tremayne, D. Thiel, Sophie Isabelle Nottle","doi":"10.1080/19346182.2012.725408","DOIUrl":"https://doi.org/10.1080/19346182.2012.725408","url":null,"abstract":"Stick speed and ball control are essential skills in field hockey but few training drills provide a quantitative measure of skill. In this study, skill development was quantified in junior elite hockey players using stick-mounted accelerometers to record hit events and the timing between each hit. Two state-ranked female groups (Under 15 and Under 18) performed four drills twice. Between the first and the repeat test, the Under 18 team experienced intense training for 3 weeks while the Under 15 team did routine weekly training for over 6 weeks. Up to 22% team improvement was evident between the training sessions. The speed of ball delivery for reverse-stick drills requiring control of the ball direction was much lower (p < 0.01) than similar forehand drills. Both teams showed little or no improvement in the reverse-stick drills. The results suggest that the modified Chapman ball control test is a good measure of stick speed and ball control. The more experienced players had much higher Chapman scores, and hit times were significantly faster (p < 0.01) than that recorded in the other drills. This low-cost measurement technique allows coaches to monitor youth training and skills improvement in field-based exercises without the use of video.","PeriodicalId":237335,"journal":{"name":"Sports Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130471201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Development of a smart oval ball for assessment of angular flight dynamics and precision of kick execution 一个智能椭圆球的开发，用于评估角飞行动力学和踢执行精度

Sports Technology Pub Date : 2011-08-01 DOI: 10.1080/19346182.2012.726224

F. Fuss, Robert Smith

引用次数: 4