• 응용통계연구
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• 제24권6호
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• pp.1139-1148
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• 2011

프로야구 정규리그의 팀순위는 합리적인 기준에 따라 정해져야 함에도 불구하고 2011년 현재 한국 프로야구에서는 비합리적인 일본식 방식이 사용되고 있는 실정이다. 본 논문에서는 한국 프로야구에서 사용된 적이 있는 팀순위 결정 방식들의 장점들을 조합하여 만든 새로운 승률 계산 방식을 제안하였다. 또한 기존의 방식들과 제안된 방식을 과거와 현재의 한국 프로야구 자료에 적용하여 그 결과를 관찰하였다.

• 응용통계연구
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• 제26권4호
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• pp.649-659
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• 2013

본 논문에서는 마르코프 연쇄로 모형을 이용하여 한국프로야구의 경기결과를 예측하고 분석하였다. 타자의 타격결과와 주자상태를 나타내는 확률과정을 구체적으로 정의하여 경기진행 상황을 동적으로 반영한 프로야구 경기를 마르코프 연쇄를 구성하여 실제 데이터를 바탕으로 주자 상태를 고려한 진루행렬과 각 선수별 타격 확률을 구하여 경기당 득점 분포와 타석에 서는 타자 수의 분포를 구하였다.

• 한국운동역학회지
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• 제17권4호
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• pp.127-139
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• 2007

The purpose of this study was to examine the pitching ability of baseball player by analysing the effect of elastic resistance exercise and pilates exercise on EMG. Five out of currently active highschool baseball player performed 5 times a week of elastic resistance exercise and pilates for 8 weeks, each for 100 minutes. They demonstrated significant increase in EMG after 8 weeks of exercise. Especially, in extensor carpi radialis brevis and flexor carpi radialis of fore arm, they demonstrated significant increase of inning figure after exercise. These results suggested that elastic resistance exercise and pilates exercise can improve pitching ability of baseball player according to inning.

• 국제물리치료학회지
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• 제3권2호
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• pp.464-468
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• 2012

The objective of this study is to provide basic information on coupled motions in thoracic spine during lateral bending from a neutral position for football and baseball players as well as for general university students. In the experiment, a total of 30 subjects participated(football players: 10, baseball players: 10, general students: 10). All subjects were in their 20's. The subjects sat on a chair with lumbar support in a neutral position and bent to the right. As a result, for baseball players, coupled motions were observed in the opposite direction of the lateral bending in all parts of thoracic spine. For both football players and general students, coupled motions were observed in the same direction. These results confirmed that unilateral movements like baseball could affect coupled motions.

• 한국컴퓨터정보학회논문지
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• 제24권2호
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• pp.17-24
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• 2019

In this paper, we propose a new model for predicting effective Win/Loss in professional baseball game in Korea using machine learning technique. we used basic baseball data and Sabermetrics data, which are highly correlated with score to predict and we used the deep learning technique to learn based on supervised learning. The Drop-Out algorithm and the ReLu activation function In the trained neural network, the expected odds was calculated using the predictions of the team's expected scores and expected loss. The team with the higher expected rate of victory was predicted as the winning team. In order to verify the effectiveness of the proposed model, we compared the actual percentage of win, pythagorean expectation, and win percentage of the proposed model.

• 미국학
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• 제42권1호
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• pp.133-159
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• 2019

On the website r/NYYankees, a sub-forum ("subreddit") of Reddit is devoted to the Major League Baseball team New York Yankees, with its predominantly male users showing their appreciation for baseball heroes by expressing erotic desires towards the players. When a player performs well, the subreddit is filled with admiration of desires to become the player's intimate lover-explicitly expressed by "male" fans. This paper explains the phenomenon of young male fans' desire for the now-lost model of traditional masculinity of domination and control, displayed in the context of baseball players' dominant performances. The discrepancy between a fan's non-homosexual real-world self and his homoerotic language on the subreddit is explained using the "performative fandom" theory, developed by Osborne and Coombs borrowing Butler's notion of performativity. This paper suggests how this desire for traditional masculinity serves as recognition to the collapse of masculinity in the modern American society.

• 응용통계연구
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• 제33권2호
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• pp.171-184
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• 2020

미국 메이저리그 야구 경기는 야구공을 추적하는 3대의 고속 카메라를 통해 모든 투구에 대한 궤적 데이터 PITCHf/x를 수집하고 공개한다. 선행 연구에서는 PITCHf/x 데이터를 통해 각 투구의 기대 피루타수를 계산하고 이를 토대로 투구의 질을 평가했다. 다만 기대 피루타수는 경기 득점으로 매번 이어지지 않기 때문에 각 투구가 승리에 기여하는 영향을 직접적으로 평가하지 못한다. 이 논문에서는 득점 기댓값과 득점 가치의 개념을 조합해 투구에 대한 기대 득점 가치를 계산하고 이를 통해 투구의 질을 랜덤 포레스트 모형으로 평가한 뒤, 기대 피루타수를 이용한 투구의 질 평가와 비교 분석한다.

• 한국운동역학회지
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• 제22권3호
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• pp.277-284
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• 2012

The purpose of this study was to find out the changes in beginners' batting movements after taking undergraduate baseball lectures, by comparing and analyzing the speed of bat, the angle of body and its segments, the angular velocity and so on. For this purpose, the author picked up five undergraduates who had not taken baseball lectures, and conducted three-dimension computerized tomography twice on them, that is, before and after taking baseball classes, with eight infrared cameras and two force platforms. The conclusions are, first, the time required for swing was shortened after taking the classes. Second, the maximum velocity of the bat-end was increased. Third, at the time of impact, while the rotation angles of the pelvis and the tip of left foot were increased, the left elbow had more flexion after the classes. Fourth, the size of ground reaction force was increased at the point of swing where the ground reaction force of left foot became maximized. As we can infer from these conclusions, beginners' hitting movements before taking baseball classes tended to swing only with the arms, without waist rotation and weight shift of the lower body, but after the classes, their movements were proved to be corrected into the swing using the lower body. For the future studies, the author expects a research in a close to real environment by using pitching machine.

• Journal of Information Technology Applications and Management
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• 제18권3호
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• pp.91-110
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• 2011

Korea professional baseball industry has grown to take the lion's share of the domestic sports industry, but still does not make break even. The purpose of this study is to examine the financial impact of adopting the Customer Relation Management (CRM) approach on the profitability of Korea professional baseball industry. We use a measuring tool called entropy used in ID3 decision tree algorithm. In the paper, we specify five the most important factors that affect spectator satisfaction based on the previous literature, perform survey analysis, calculate entropy values, and find the results. We predicted the change in revenues when we adopt CRM by checking the spectators' willingness to pay more when the conditions of each factor are improved. We find that we can reap significant fruits of the effect of CRM introduction through enhancing 'game content factor' and 'game promotion factor' among the five factors. We also find that we can increase the revenues of domestic professional baseball teams to 2.4 times or 2.1 times the current level if we manage intensively those two factors respectively. It is very surprising to see that the improvement in total revenues makes both ends meet for domestic professional baseball teams. This clearly demonstrates the effectiveness of CRM approach in improving the profitability of organizations.

• 한국운동역학회지
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• 제30권2호
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• pp.165-172
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• 2020

Objective: The purpose of this study was to provide quantitative and objective data of throwing movement in baseball catcher through biomechanical analysis. Method: Eight high school baseball catchers (age: 17.3±0.7 yrs, height: 175.3±4.5 cm, weight: 82.5±9.0 kg, Career: 7.4±2.1 yrs) participated and 3-dimentional motion capture system and electromyography (EMG) were used in this study. Results: The maximum center of mass position displacement was observed in forward direction. The linear velocity magnitude of the upper extremity segments were showed as "wrist>elbow>shoulder" which is indicative of kinematic chain. For kinetic EMG data, we also observed the greater muscle activation in the left brachioradial and erector spine muscles muscle that during throwing movement. Conclusion: We expect that biomechanical data from this study will provide important training implications to baseball coaches and trainers in order to effectively train their baseball catchers.