International Journal of Computer Science in Sport最新文献_第8页

The training of soccer assistant referees beyond on-field experience: the use of the Interactive Video Test 超越现场经验的足球助理裁判训练:互动视频测试的使用

International Journal of Computer Science in Sport Pub Date : 2018-12-01 DOI: 10.2478/ijcss-2018-0009

M. Armenteros, Anto J. Benítez, R. F. Díaz, M. Quintana, M. S. Cid, J. Simón

引用次数: 3

Probabilistic models comparing Fast4 and traditional tennis 比较Fast4和传统网球的概率模型

International Journal of Computer Science in Sport Pub Date : 2018-12-01 DOI: 10.2478/ijcss-2018-0008

Emma Simmonds, P. O'Donoghue

{"title":"Probabilistic models comparing Fast4 and traditional tennis","authors":"Emma Simmonds, P. O'Donoghue","doi":"10.2478/ijcss-2018-0008","DOIUrl":"https://doi.org/10.2478/ijcss-2018-0008","url":null,"abstract":"Abstract Tennis matches are hierarchies made up of sets containing games which, in turn, contain points. Traditional tennis games and tiebreakers could theoretically be infinite in length because a player needs to be at least 2 points ahead of the opponent to win. Fast4 tennis is a newer format of tennis that has been used at a number of levels of the sport including professional tennis where it has been used in Next Generation Finals events since 2017. The purpose of the current investigation is to compare the traditional tennis format to Fast4 tennis in terms of the probability of different players winning matches and the duration of matches. Probabilistic models of Fast4 tennis games and tiebreakers were developed. These models allowed the probability of winning games and tiebreakers to be compared between the two formats of tennis for a range of probabilities of players winning points. The models were then used within a series of simulations to determine the probability of winning sets and matches as well as the durations of games, tiebreakers, sets and matches in the two formats. Each component of the two formats of tennis was simulated 100,000 times revealing a reduced impact of serve, greater chance of upsets and shorter matches in Fast 4 tennis than in traditional tennis. The probability of players of differing abilities winning matches as well as the duration of tennis matches should be considered by those making decisions on the format of matches to be applied in tennis tournaments as well as by those preparing to compete in such tournaments.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44820568","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: 4

Eye tracking in high-performance sports: Evaluation of its application in expert athletes 眼动追踪在高水平运动中的应用评价

International Journal of Computer Science in Sport Pub Date : 2018-12-01 DOI: 10.2478/ijcss-2018-0011

Stephanie Hüttermann, B. Noël, D. Memmert

引用次数: 35

Geometric simplification of a new penalty area for football 几何简化的一个新的足球禁区

International Journal of Computer Science in Sport Pub Date : 2018-12-01 DOI: 10.2478/ijcss-2018-0010

C. A. Morales

引用次数: 1

Rest vs. Rust: The Effect of Disproportionate Time Between Rounds of a Playoff Series 休息与生锈：季后赛各轮比赛时间不均衡的影响

International Journal of Computer Science in Sport Pub Date : 2018-12-01 DOI: 10.2478/ijcss-2018-0007

Timothy L. Urban

引用次数: 1

Comparison of Different Time-Frequency Analyses Techniques Based on sEMG-Signals in Table Tennis: A Case Study 基于表面肌电信号的乒乓球时频分析技术比较

International Journal of Computer Science in Sport Pub Date : 2018-07-01 DOI: 10.2478/ijcss-2018-0004

Bin Lin, S. Wong, A. Baca

{"title":"Comparison of Different Time-Frequency Analyses Techniques Based on sEMG-Signals in Table Tennis: A Case Study","authors":"Bin Lin, S. Wong, A. Baca","doi":"10.2478/ijcss-2018-0004","DOIUrl":"https://doi.org/10.2478/ijcss-2018-0004","url":null,"abstract":"Abstract The surface EMG signal in the action of dynamic contraction has more movement interference compared to sustained static contractions. In addition, the recruitment and de-recruitment of motor units causes a faster change in the surface EMG signal’s proprieties. Therefore, more complex techniques are required to extract information from the surface EMG signal. The standardized protocol for surface myoelectric signal measurement in table tennis was a case study in this research area. The Autoregressive method based on the Akaike Information Criterion, the Wavelet method based on intensity analysis, and the Hilbert-Huang transform method were used to estimate the muscle fatigue and non-fatigue condition. The result was that the Hilbert-Huang transform method was shown to be more reliable and accurate for studying the biceps brachii muscle in both conditions. However, the Wavelet method based on intensity analysis is more reliable and accurate for the pectoralis major muscle, deltoideus anterior muscle and deltoideus medialis muscle. The results suggest that different time-frequency analysis techniques influence different muscle analyses based on surface EMG signals in fatigue and non-fatigue conditions","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2478/ijcss-2018-0004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43217745","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: 2

Some New ‘Short Games’ Within a Set of Tennis 一套网球中的一些新的“短局”

International Journal of Computer Science in Sport Pub Date : 2018-07-01 DOI: 10.2478/ijcss-2018-0003

G. Pollard, T. Barnett

{"title":"Some New ‘Short Games’ Within a Set of Tennis","authors":"G. Pollard, T. Barnett","doi":"10.2478/ijcss-2018-0003","DOIUrl":"https://doi.org/10.2478/ijcss-2018-0003","url":null,"abstract":"Abstract Recently there has been an interest in developing tennis scoring systems that involve playing a fewer number of points on average. In devising such ‘shorter’ tennis scoring systems, it would be ideal for them to also have the following four characteristics: A smaller standard deviation of duration, a similar value for the probability that the better player wins, an increased efficiency, and a greater average excitement per point played. Thus, in total there are five considerations when devising such new scoring systems. Quite often in this type of study a scoring system that is ‘better’ with regard to one of these characteristics is ‘worse’ with regard to another (or others). In this paper we outline some new tennis scoring systems that have improvements in all (or almost all) of these five characteristics. We identify 3 or 4 different game structures that could be useful for tournaments. A common thread in the approach taken is the elimination of unimportant and unexciting points within the game structure. The choice of which is the most appropriate new format for a particular tournament would depend amongst other things on the planned reduction in the expected set duration","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47757786","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: 2

Using Several Types of Virtual Characters in Sports - a Literature Survey 几种类型的虚拟人物在体育运动中的运用——文献综述

International Journal of Computer Science in Sport Pub Date : 2018-07-01 DOI: 10.2478/ijcss-2018-0001

K. Petri, N. Bandow, K. Witte

{"title":"Using Several Types of Virtual Characters in Sports - a Literature Survey","authors":"K. Petri, N. Bandow, K. Witte","doi":"10.2478/ijcss-2018-0001","DOIUrl":"https://doi.org/10.2478/ijcss-2018-0001","url":null,"abstract":"Abstract This article discusses the development and application of virtual environments (VEs) in the domain of exercise as well as research in recreational and high-performance sports. A special focus is put on the use of virtual characters (VCs). For its elaboration, the following criteria parameters were chosen: scene content and the role of the VC, output device, kind of additional feedback, level of expertise of the tested participants, kind of user’s movement (reaction), kind of the visualization of the user’s body, kind of study and kind of evaluation. We explored the role of VCs embodying virtual opponents, teammates, or coaches in sports. We divided these VCs in passive and autonomous characters. Passive VCs are not affected by the user, whereas autonomous VCs adapt autonomously to the user’s movements and positions. We identified 44 sport related VEs, thereof 22 each in the domain of recreational sports and high-performance sports: of the identified 44 VEs, 19 VEs are without VC, 20 VEs with passive VCs, and 5 VEs with autonomous VCs. We categorized studies examining expert athletes in high-performance sports as well as studies analyzing novices, beginners or advanced athletes in recreational sports. Nevertheless, all identified systems are suitable for athletes of recreational and high-performance level","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2478/ijcss-2018-0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47501566","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: 20

Mining Automatically Estimated Poses from Video Recordings of Top Athletes 从顶级运动员的录像中自动估计姿势

International Journal of Computer Science in Sport Pub Date : 2018-04-24 DOI: 10.2478/ijcss-2018-0005

R. Lienhart, Moritz Einfalt, D. Zecha

{"title":"Mining Automatically Estimated Poses from Video Recordings of Top Athletes","authors":"R. Lienhart, Moritz Einfalt, D. Zecha","doi":"10.2478/ijcss-2018-0005","DOIUrl":"https://doi.org/10.2478/ijcss-2018-0005","url":null,"abstract":"Abstract Human pose detection systems based on state-of-the-art DNNs are about to be extended, adapted and re-trained to fit the application domain of specific sports. Therefore, plenty of noisy pose data will soon be available from videos recorded at a regular and frequent basis. This work is among the first to develop mining algorithms that can mine the expected abundance of noisy and annotation-free pose data from video recordings in individual sports. Using swimming as an example of a sport with dominant cyclic motion, we show how to determine unsupervised time-continuous cycle speeds and temporally striking poses as well as measure unsupervised cycle stability over time. The average error in cycle length estimation across all strokes is 0.43 frames at 50 fps compared to manual annotations. Additionally, we use long jump as an example of a sport with a rigid phase-based motion to present a technique to automatically partition the temporally estimated pose sequences into their respective phases with a mAP of 0.89. This enables the extraction of performance relevant, pose-based metrics currently used by national professional sports associations. Experimental results prove the effectiveness of our mining algorithms, which can also be applied to other cycle-based or phase-based types of sport.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49224806","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: 10

The Accuracy and Reliability of a New Optical Player Tracking System for Measuring Displacement of Soccer Players 一种用于测量足球运动员位移的新型光学跟踪系统的准确性和可靠性

International Journal of Computer Science in Sport Pub Date : 2017-12-01 DOI: 10.1515/ijcss-2017-0013

Jocelyn K Mara, S. Morgan, K. Pumpa, K. Thompson

{"title":"The Accuracy and Reliability of a New Optical Player Tracking System for Measuring Displacement of Soccer Players","authors":"Jocelyn K Mara, S. Morgan, K. Pumpa, K. Thompson","doi":"10.1515/ijcss-2017-0013","DOIUrl":"https://doi.org/10.1515/ijcss-2017-0013","url":null,"abstract":"Abstract Recently, a novel optical player tracking system has been developed to determine positional information of athletes in a non-invasive manner. The aim of this study was to measure the accuracy and reliability of displacement estimates derived from the system. Participants completed five soccer-specific running courses at three different speeds three times each, while being filmed using the multi-camera system. The participant’s x,y field positions were determined by the optical player tracking system and displacement was estimated using Euclidean distance, and compared with real distance. On average, the difference between actual distance and estimated displacement was 0.25% (mean absolute difference = 0.79 ± 0.56m) with a slightly larger coefficient of variation during 90° turns (4.89%) when compared with straight line running (4.09%). In addition, there were strong correlations between actual distance and measured displacement (r = 0.986 – 0.988). Collectively, the typical error (0.25 – 0.36 m), typical error as a coefficient of variation (1.06 – 1.75%) and intraclass correlation coefficient (0.88 – 0.93) showed high levels of intra-operator reliability. The optical player tracking system provides accurate and reliable estimates of displacement of players on a soccer field. This system provides non-invasive position detections for players and opposition players during soccer matches.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ijcss-2017-0013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44131608","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: 7