축구 경기력 요인의 포지션별 차이분석과 가중치 적용

홍성진 한국체육측정평가학회 2018 한국체육측정평가학회지 Vol.20 No.4

This research is aimed to proposing a player evaluation model that can be used in the field by analyzing actual game and applying the data based on methodology to evaluate the performance of soccer players. For this purpose, the following result are obtained by applying the factors and weights shown in the research conclusion of Hong Sung-jin (2017) to actual analysis data. First, the difference analysis results by each position for attack power (score, assist) show differences in scoring, not in assists. Assist can be seen as contributing to scoring in all different positions, regardless of position. Second, the analysis of differences in positions about basic skills (shooting, passing, and dribbling) all shows statistical differences. The post-verification test show no differences between a forward and a midfielder in shooting. In other words, a forward and midfielder can be considered the same position in shooting. In the pass, the team show up in order as a defender, midfielder, and striker. In dribbling, player tries a lot in order as a striker, midfielder, and defender. Third, the analysis of differences in positions of defense (tackle, interceptor, clearing and block) show statistical differences in tackle, clearing and block, and no difference in intercept. Look at the post-verification test, there are no differences between a forward and a midfielder in tackle, clearing and block. In other words, It can be considered as same position. In the meantime, it was concluded that the intercept is working in all positions. Fourth, the analysis of the difference by position in contribution (air ball competition, secondary ball acquisition) showed a statistical difference in the air ball competition, and the second ball has no difference. In particular, the midfielders were the lowest, strikers trying the most air ball competition. As a result Every position tries to take a second ball. Fifth, after analyzing the total score with applying weights, midfielders show highest score. The score of offense defence occupied highest possesion, followed by the forward. In other words, the team could be analasys that used wingback's overlapping or cross a lot. In terms of basic skill, defense, and contribution, midfielders all conclude high scores. It can be seen as the basis for showing the level and importance of midfielders in university football. 이 연구는 축구 선수의 포지션별 차이를 규명하고 가중치 적용을 위한 방법론을 토대로 선수평가 모델을 제시하는데 목적이 있다. 이를 위해 홍성진과 이기봉(2017)의 연구결과에 나타난 요인과 가중치를 실제 분석데이터에 적용하여 다음과 같은 결론을 얻었다. 첫째, 공격력(득점, 도움)에 대한 포지션별 차이분석 결과는 득점에서 차이가 나타났으며, 도움에서는 나타나지 않았다. 도움은 포지션에 상관없이 다양하게 모든 위치에서 득점에 기여할 수 있다고 볼 수 있다. 둘째, 기본능력(슈팅, 패스, 드리블)에 대한 포지션별 차이 분석 결과 모두 통계적 차이가 나타났다. 사후검증을 살펴보면 슈팅에서 공격수와 미드필더의 차이가 나타나지 않았다. 즉, 공격수와 미드필더는 슈팅에 있어 같은 포지션이라고 봐도 된다는 것이다. 패스에서는 수비수, 미드필더, 공격수 순으로 나타났다. 드리블에서는 공격수, 미드필더, 수비수 순으로 많이 시도하는 것으로 나타났다. 셋째, 수비력(태클, 인터셉터, 클리어링, 블락)에 대한 포지션별 차이분석 결과는 태클, 클리어링, 블락에서 통계적 차이를 보였으며, 인터셉터는 차이가 나타나지 않았다. 사후검증을 살펴보면 태클, 클리어링, 블락에서 공격수와 미드필더는 차이가 없었다. 즉 이 요인에서는 같은 포지션으로 봐도 된다는 것이다. 한편 인터셉터는 모든 포지션에 걸쳐 노력하고 있다는 결론을 얻었다. 넷째, 기여도(공중볼경합, 세컨볼획득)에 대한 포지션별 차이분석 결과 공중볼경합에서 통계적 차이를 보였으며, 세컨볼획득은 차이가 나타나지 않았다. 특히, 공중볼 경합은 공격수가 가장 많이 시도하는 것으로 나타났으며, 미드필더가 가장 낮았다. 세컨볼은 전 포지션이 같이 노력한다는 결과로 보여진다. 다섯째, 가중치를 적용하여 총점을 분석해본 결과 미드필더들이 높은 점수를 보였다. 공격력의 점수에서는 수비수 가장 높게 나타났으며, 다음으로 공격수 순으로 나타났다. 즉, 이 팀은 윙백의 오버래핑이나 크로스를 많이 활용하는 팀으로 볼 수 있었다. 기본능력, 수비력, 기여도에서는 모두 미드필더들의 점수가 높은 분포를 보였다. 이는 대학축구에서 미드필더들의 활동량과 중요성을 나타내는 근거로 볼 수 있다.

CPT와 DMT를 이용한 부산점토의 최대전단탄성계수 추정방법에 관한 연구

홍성진,이종섭,윤형구,이우진 한국지반공학회 2009 한국지반공학회논문집 Vol.25 No.6

본 연구는 콘 관입시험(CTP)과 딜라토미터시험(DMT)을 이용한 부산지역 점토의 최대전단탄성계수 추정(Gmax)에 관한 것이다. 이를 위해 부산신항 지역과 녹산지역에서 피에조콘 관입시험(CPT) 및 딜라토미터시험(DMT)를 수행하였으며, 비교란 시료를 채취하여 hybrid oedometer 시험을 실시하였다. Oedometer 내벽에 장착된 벤더엘리먼트로 전단파 속도를 측정하여 최대전단탄성계수를 산정하였으며, 이를 바탕으로 부산점토의 최대전단탄성계수와 구속응력, 간극비, 응력이력간의 관계를 파악하였다. 현장시험 및 실내시험을 분석한 결과, qt와 Gmax의 상관계수 αG는 소성지수에 반비례하는 것으로 나타났으며, ED와 Gmax의 상관계수 RG는 (1/ID)(pa/σ'v)0.5와 비례관계를 나타냈다. 이러한 관계를 바탕으로 본 연구에서는 CPT와 DMT 시험으로부터 Gmax를 추정하는 방법을 개발하였으며, 제안된 방법은 부산점토의 최대전단탄성계수를 적절하게 예측하는 것으로 관찰되었다.

유전 지능형 이동로봇의 활용과 기술소개

홍성진,한태원 한국로봇학회 2014 로봇과 인간 Vol.11 No.3

간극수압비를 이용한 부산점토의 CPTu 콘계수 추정

홍성진,이문주,김태준,이우진 한국지반공학회 2009 한국지반공학회논문집 Vol.25 No.1

Cone factors, Nkt, Nke and N△u, for estimating undrained shear strength of Busan clay are evaluated in this study. For this, CPTu and field vane tests are performed for clay layers at two sites, Busan new-port and Noksan, and also CK0U triaxial tests with undisturbed samples taken from the same site are carried out. From experimental results, it is observed that the undrained shear strengths of clay increases with depth, and the undrained shear strength obtained from triaxial tests is 1.5 times higher than one obtained from vane tests. The normalized undrained shear strengths of Busan clay from triaxial and vane shear tests are 0.26~0.44 and 0.20~0.23, respectively. In CPTu results, cone tip resistance (qc) and pore pressure (u₂) linearly increase with depth, and the pore pressure ratio (Bq) of Busan clay is within the range of 0.3~1.0. The cone factors, which are determined by comparing the CPTu results with CK0U triaxial and vane shear test results, are found to be 5~20 and 10∼35, respectively. It is also observed that the cone factors are inversely proportional to the pore pressure ratio. From this, the prediction methods for evaluating the cone factors of Busan clay are developed.

Clinical Implication of Optical Coherence Tomography-Based Neoatherosclerosis

홍성진,이승률,홍명기 대한의학회 2017 Journal of Korean medical science Vol.32 No.7

Recent research has indicated neoatherosclerosis (NA), the de novo development of atherosclerosis within the neointimal region of the stented segment after coronary stent implantation, as a mechanism of late/very late stent thrombosis (VLST) and restenosis. This research is based on histologic and intravascular imaging studies. Optical coherence tomography (OCT) is an imaging tool that is superior with regard to resolution capacity, and can be used to visualize detailed information about distinct morphological characteristics of the restenotic tissue. Thus, OCT is a valuable imaging tool for examining NA, such as macrophage infiltration, lipid accumulation, in-stent calcification, or neointimal rupture. This article discusses the prevalence, predictors, and clinical implications of NA that can be observed by OCT.

Effect-Directed Analysis: Current Status and Future Challenges

홍성진,John P. Giesy,이정숙,이종현,김종성 한국해양과학기술원 2016 Ocean science journal Vol.51 No.3

Effect-directed analysis (EDA) has become useful for identification of toxicant(s) that occur in mixtures in the environment, especially those that are causative agents of specific adverse effects. Here, we summarize and review EDA methodology including preparation of samples, biological analyses, fractionations, and instrumental analyses, highlighting key scientific advancements. A total of 63 documents since 1999 (Scopus search) including 46 research articles, 13 review papers, and 4 project descriptions, have been collected and reviewed in this study. At the early stage (1999– 2010), most studies that applied EDA focused on organic extracts of freshwater and coastal contaminated sediments and wastewater. Toxic effects were often measured using cell-based bioassays (in vitro) and the causative chemicals were identified by use of low resolution gas chromatography with mass selective detector (GCMSD). More recently (2010–present), EDA has been extended to various matrices such as biota, soil, crude oil, and suspended solids and techniques have been improved to include determination of bioavailability in vivo. In particular, methods for non-target screenings of organic chemicals in environmental samples using cutting-edge instrumentation such as time of flight-mass spectrometry (ToF-MS), Fourier transform-ion cyclotron resonance (FT-ICR), and Orbitrap mass spectrometer have been developed. This overview provides descriptions of recent improvements of EDA and suggests future research directions based on current understandings and limitations.

Subtotal Myectomy for Recurrent Cricopharyngeal Dysphagia in a Dog

홍성진,박성곤,김상연,문희섭,박완상,김준수,강성훈,이재훈 韓國臨床獸醫學會 2017 한국임상수의학회지 Vol.34 No.4

An 8-month-old Chow-Chow dog presented with dysphagia and regurgitation, and was diagnosed with cricopharyngeal dysphagia (CPD). Cricopharyngeal myotomy did not improve the clinical signs. Three months after the initial surgery, a subtotal myectomy of cricopharyngeal muscle with partial thyropharngeal myotomy was performed. The clinical improvement was maintained for more than one year after the second surgery. Subtotal myectomy of cricopharyngeal muscle can be considered for dogs with CPD that do not respond to myotomy.

Effect of Adjunct Balloon Dilation after Long Everolimus-eluting Stent Deployment on Major Adverse Cardiac Events

홍성진,안철민,신동호,김중선,김병극,고영국,최동훈,허애영,김용훈,장양수,홍명기 대한심장학회 2017 Korean Circulation Journal Vol.47 No.5

Background and Objectives The effectiveness of adjunct balloon dilation after drug-eluting stent (DES) deployment has not been sufficiently evaluated. We evaluated whether adjunct balloon dilation was associated with a reduction in major adverse cardiac events (MACEs) after long everolimus-eluting stents (EESs) implantation. Subjects and Methods Drawing from 2 randomized trials, a total of 1,672 patients treated with long EES were analyzed. Of 1,672 patients, 1,061 patients (64%) received post-stent adjunct balloon dilation. MACE, defined as a composite of cardiac death, myocardial infarction, and target-lesion revascularization (TLR), was compared between patients who received post-stent adjunct balloon dilation and patients who did not in 595 propensity score-matched pairs. Results For the matched population, MACE occurred in 29 patients (4.9%) who received adjunct balloon dilation and in 29 patients (4.9%) who did not (hazard ratio [HR], 1.01; 95% confidence interval [CI], 0.60–1.69; p=0.972). However, significant interactions were observed among the subgroups for clinical presentation and vessel size. Adjunct balloon dilation was more favored within the subset of patients with stable angina vs. the subset of patients with acute coronary syndrome (p for interaction=0.037), and within the subset of lesions with small vessel diameter (reference vessel diameter [RVD] <3 mm) vs. the subset of lesions with larger vessel diameter (RVD ≥3 mm; p for interaction=0.027). Conclusion Adjunct balloon dilation was not associated with MACE reduction at 1 year among patients requiring long EES implantation. However, post-stent adjunct balloon dilation may be necessary for patients requiring long EES implantation who present with stable angina or for lesions with small vessel diameters.

영상분석을 통한 피드백이 축구 기술검사 학습에 미치는 영향

홍성진 호남대학교 축구과학연구소 2014 축구과학연구 Vol.4 No.-

이 연구는 축구 기술검사를 활용하여 ‘언어적’, ‘언어+시각적’, ‘언어+영상분석’ 피드백에 따른 다양한 효과를 알아보는 데 목적이 있다. 이를 위하여 체육학과 일반학생 60명을 대상으로 각각 세집단 으로 나누고, 축구기술검사 사전․후 측정을 통하여 다음과 같은 결론을 도출하였다. 첫째, 드리블 검사에서는 반복측정 간 주효과에서 차이가 나타났다. 하지만 그 차이의 폭이 미미한 정도로 나타났다. 둘째, 패스 검사에서는 ‘언어’와 ‘언어+영상’간의 상호작용 효과가 나타났다. 특히, 언어를 통한 피드백과 영상을 이용한 피드백 간의 차이가 많이 나타나 시각적 정보의 중요성이 제시되었다. 셋째, 슈팅 검사에서는 영상분석피드백이 다른 방법과 각각 상호작용 효과가 나타났다. 영상분석을 통한 피드백의 상호작용이 가장 높게 나타나 향후 스포츠 영상분석에 대한 다양한 검증이 제기 된다.

2014 브라질월드컵에 나타난 경기 중 이동거리 및 움직임강도 비교 분석

홍성진,최형준,정연성 한국체육측정평가학회 2014 한국체육측정평가학회지 Vol.16 No.2

The purpose of this study was to compare the movement distances and intensity of movement of players stats within several conditions such as regional, positional and results upon rounds of 16 in 2014 Brazil World Cup. As results, there were significant differences of intensity of movement on low-intensity of movement (p=.017), middle-intensity of movement(p<.001), high-intensity of movement(p=.043) and total distance of movement(p=.006) between regions. However, there was no significant difference on sprint movement. The low-intensity of movement by European countries was 6 km as an average in a match and about 5.8 km per a match by South American countries and African countries was confirmed. The middle-intensity of movement by Europe and Asian countries was greater than other regions, but it was smaller by South America and African countries. The high-intensity of movement by Asian countries was greater than other regions. Additionally, the greater values were ordered by South America, North & Central America and African Countries. The total distance of movement by Asia was about 11.5km per a match and about 10.3 km per a match by European countries. And it was about 9.7km per a match by South America and African countries. The most active region in a football pitch was Asian countries that it was greater than South America and African by about 1.8 km in average. Secondly, there were no significant differences on a comparison of results upon rounds of 16. However, the variables used in this study were little higher where the team was successful to rounds of 16. Thirdly, there were significant differences on the middle-intensity of movement(p<.001), the high-intensity of movement(p<.001), the total distance of movement(p<.001) and sprint(p<.001), but not in the low-intensity of movement between positions by players. All variables by mid-fielders were greater than other position in the middle-, high-intensity of movement and the total distance of movement. Consequently, the movement by European countries was greater distance and effective movement(low-intensity) so that it would be more effective operation in a play. However, the movement by Asian countries was greater distance, but it was also high-intensity of movement. Also, it confirmed the importance of fitness required for mid-fielder than other position. 이 연구는 2014 브라질월드컵에서 제공되는 공식 분석 자료를 수집하고 이를 활용하여 대륙별, 16강 진출 성공⋅실패, 포지션별에 따른 경기 중 이동거리와 움직임 강도 요인의 차이를 분석하여 다음과 같은 결론을 도출하였다. 첫째, 대륙별로는 저강도로 움직인 거리(p=.017), 중강도로 움직인 거리(p<.001), 고강도로 움직인 거리(p=.043), 총 움직인 거리(p=.006)에서 각각 유의한 차이가 나타났으며, 전력질주는 차이가 없었다. 저강도 움직임은 유럽이 약 6km 정도로 가장 높게 나타났으며, 남미와 아프리카가 약 5.8km로 낮게 나타났다. 중강도 움직임은 유럽과 아시아가 높게 나타났으며, 남미와 아프리카가 낮게 나타났다. 고강도 움직임은 아시아가 가장 높게 나타났고, 남미⋅북중미⋅아프리카 순으로 나타났다. 총 움직인 거리는 아시아가 약 11.5km, 유럽이 약 10.3km로 높게 나타났으며, 남미와 아프리카는 약 9.7km로 나타났다. 아시아는 가장 많이 뛰는 대륙이며, 남미와 아프리카에 비해 경기당 평균 약 1.8km 더 많이 뛰는 것으로 나타났다. 둘째, 16강 진출 성공⋅실패별로는 모든 요인에서 차이가 없었다. 하지만 각 요인별로 16강 진출에 성공한 팀들이 조금씩 높은 움직임 경향을 보였다. 셋째, 포지션별로는 중강도로 움직인 거리(p<.001), 고강도로 움직인 거리(p<.001), 총 움직인 거리(p<.001), 전력질주(p<.001)에서 각각 유의한 차이가 나타났으며, 저강도 움직임에서는 차이가 없었다. 중강도 움직임, 고강도 움직임, 총 움직임 요인에서 모두 미드필더가 가장 높게 나타났으며, 미드필더는 수비수에 비해 약 1km 더 많이 뛰는 것으로 나타났다. 전력질주에서는 공격수⋅미드필더⋅수비수 순으로 높게 나타났다. 공격수는 수비수에 비해 경기당 약 10회를 더 많이 전력질주 하는 것으로 나타났다. 이상을 종합해볼 때 유럽은 많은 이동거리를 나타내면서도 저강도 움직임이 높아 효율적인 경기운영을 한다고 볼 수 있다. 반면, 아시아는 가장 많은 이동거리를 기록하였지만 고강도 움직임이 많아 비효율적인 경기를 하였다. 또한, 공격수⋅미드필더⋅수비수의 체력적 이동거리와 움직임 강도를 확인하였으며, 미드필더의 체력부분의 중요성을 제시하는 바이다.