• International Journal of Human Ecology
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• 제14권1호
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• pp.41-55
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• 2013

The purpose of this study was to analyze human upper body surface changes at the shoulder and back area. The body surface data were analyzed in terms of muscle and bone displacement in dynamic postures. Body surface data were collected with a 3D body scanner. The body surface was scanned at the static and four baseball batting postures. The body surface dimensions over the deltoids, scapulae and trapezius were measured. The results show that the vertical measurements of the deltoids increased by 20%. The horizontal measurements of the axilla of the back increased. The surface of the trapezius was elongated by over 10%, and the lower back musculature was elongated by about 50%. The results of this study showed that changes in back body surface caused by upper arm movements. It was influenced by the deltoid articulated with the humeri and the scapulae and trapezius. These body surface changes caused by muscle activities and ranges of motion can be used to design functional clothing.

• 응용통계연구
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• 제23권6호
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• pp.1191-1199
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• 2010

Knowing what factors into a player's ability to affect the outcome of a sports game is crucial. This knowledge helps determine the relative degree of contribution by each team member as well as sets appropriate annual salaries. This study uses statistical analysis to investigate how much the outcome of a professional baseball game is influenced by the records of individual players. We used the Lotte Giants' data on 252 games played between 2007 and 2008 that included environmental data(home or away games and opponents) as well as pitchers' and batters' data. Using a SAS Enterprise Miner, we performed a logistic regression analysis and decision tree analysis on the data. The results obtained through the two analytic methods are compared and discussed.

• 한국전기전자재료학회논문지
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• 제25권2호
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• pp.110-113
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• 2012

ZnO crystals with a baseball bat shape were synthesized without any catalysts through a simple thermal oxidation of ZnS powder in alumina crucible under air atmosphere. SEM images demonstrated that the bat structure was composed of two pieces of ZnO crystals, i.e hexagonal-shaped rod and inverted cone-shaped rod. X-ray diffraction (XRD) pattern revealed that the ZnO crystals had wurtzite hexagonal structure. Energy dispersive X-ray (EDX) spectrum showed that the ZnO was of high purity. A strong green emission peak at 510 nm was observed in cathodoluminescece spectrum.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.541-546
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• 2009

There are many videos about sports. There is a large need for content based video retrievals. In sports videos, the motions and camera works have much information about shots and plays. This paper proposes the baseball game process understanding using the similar motion retrieval on videos. We can retrieve the similar motion parts based on motions shown in videos using the space-time images describing the motions. Using a finite state model of plays, we can decide the precise point of pitches from the pattern of estimated typical motions. From only the motions, we can decide the precise point of pitches. This paper describes the method and the experimental results.

• 대한안전경영과학회지
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• 제4권2호
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• pp.1-10
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• 2002

In order to protect the head, baseball helmet must to have proper strength and to absorb the kinetic energy. The purposes of this study are to validate whether the helmet have the protecting ability or not. We performed three kinds of experiment to know about the this ability. To find out the limit of displacement at 4 points(front, rear, right side, and left side), the static load by magnetic dial gauges were used, and to validate the ability of absorption, drop tests were peformed from 0.5 and 1.0 meter. Futhermore, we calculated natural frequency of the helmets by the principle of Lissajous Diagram and we performed FEM(Finite Element Method) analysis. From the results of these experiments, we found that the displacement of helmet was largest at rear point and it was smallest at left-side point(ear-covered part). The ability of absorption was better at the left-side point than the other points.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2018년도 제57차 동계학술대회논문집 26권1호
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• pp.241-242
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• 2018

야구 관람객들은 주로 자기가 선호하는 팀의 경기나 이길 가능성이 높은 경기를 관람하고자 한다. 때문에 시중에 지난 경기, 당일의 경기, 미래 경기에 대한 정보를 얻을 수 있는 KBO 사이트와 경기 승/패를 예측하기 위한 정보를 얻을 수 있는 사이트에서 경기 기록에 대한 정보를 얻어 관람 일을 결정하는데 도움을 얻는다. 따라서 본 연구에서는 데이터마이닝을 통하여 프로야구 팬들이 특정 팀의 승/패를 예측하는데 사용할 수 있는 유용한 규칙과 패턴을 도출해보고자 한다.

• 한국공간구조학회논문집
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• 제10권4호
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• pp.133-140
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• 2010

본 논문은 서남권 돔 야구장의 불안정 거동을 파악하고자 한다. 해석 대상 구조물의 설계하중과 이들의 조합 하중에 의한 하중모드에 대하여 구조물의 비선형 Snapping 현상을 조사하며, 초기 불완전성은 접선강성행렬의 고유치해석을 통해 좌굴 모드를 얻고 이를 비선형해석에 이용한다. 단 부재좌굴 또는 국부좌굴 등은 본 연구과제의 연구범위에 고려치 않으며, 전체좌굴 현상에 한정한다.

• Journal of the Korean Data and Information Science Society
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• 제25권3호
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• pp.485-492
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• 2014

투수를 평가할 때 중요한 요소는 일반적으로 다승과 방어율을 사용하지만 이 지표들은 팀의 도움 또는 운과 같은 요소의 영향을 받는다. 그래서 야구통계학자들은 투수 개인의 능력만을 측정하는 많은 지표들을 제안하였는데 이와 같은 평가지표들은 가짓수가 너무 많고 복잡하기 때문에 팬들을 때때로 당황하게 만든다. 본 연구에서는 대표적인 투수평가지표들을 이용하여 지표들의 특성을 반영하는 주성분을 찾아보고 한국프로야구에 적합한 투수들의 능력을 객관적으로 평가할 수 있는 투수지표를 제안하였다.

• Asia Marketing Journal
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• 제25권3호
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• pp.148-159
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• 2023

As Major League Baseball (MLB)'s continuous decline in popularity has caused its game attendance to drop gradually, the league makes a desperate attempt such as game rule changes to remain relevant. Along with the introduction of new rules to make games more dynamic such as the pitch clock, bigger bases, and defensive shift limitations, it is important for MLB franchises to understand drivers for game attendance. We focus on the effect of accumulated winning performance of the two teams on game attendance, one of the key drivers of game attendance, and investigate how it is influenced by consumer and industry factors such as online search and game rule changes. We find that game attendance increases as the prior winning performance of the home (away) team increases (decreases). We also find that online search and rule changes for more dynamic games moderate the effect of winning performance on game attendance.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2024년도 춘계학술발표대회
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• pp.500-501
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• 2024

야구 기록을 과학적으로 해석하고 개별 선수를 설명할 수 있는 다양한 지표가 존재한다. 하지만, 각 지표는 복잡하고 때로는 난해하다. 본 논문은 야구 지표를 이해하고자 하는 야구 팬의 니즈를 충족하기 위해 직관적으로 이해할 수 있는 지표와 이를 기반으로 게임을 직접 웹 상에서 시뮬레이션할 수 있는 서비스를 제안한다. 게임과 분석 기능을 위해 가중 평균, 최대-최소 정규화 및 로지스틱 함수와 같은 수학적 및 통계적 방법을 적용한 지표를 정의하고, 사용자 친화적인 UX/UI 를 통해 게임 시뮬레이션의 가독성을 높여 기존 플랫폼과 차별화했다.