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송성우(Song, Sung-Woo),민창기(Min, Chang-Gi),지용석(Ji, Yong-Seok),유도상(Ryu, Do-Sang),박순희(Park, Sun-Hee) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1
The purpose of this study is to develop the assessment tool of front and side movement for qualitative analysis of the sports technique about running jump heading skill movement of soccer. The assessment tool was processed according to the study on literature and the opinions of soccer experts, and a content validity investigation(CVI) was carried out by the group of experts. To test the completed tool´s reliability, elementary school amateur players, elite players and middle school elite players were divided into 10 advanced level, 10 middle level and 10 low level players according to their career. After recording their running jump heading movements on a video, the test was carried out by seven assessors who have KFA coach certification higher than 3rd level and whose career as a soccer player is more than 10 years. To verify its reliability, the tool was processed by Cronbach-alpha coefficients, Intra-class correlation (ICC). The study is summarized as follows. First, total 28 questions were developed with 17 front and 11 side questions, deleting two questions of which CVI figures were lower than 80% out of the 30 preliminary questions based on the study on literature and the opinions of soccer experts. Second, Cronbach-alpha coefficients in the assesment tool showed more than 0.98, and the reliability of 17 front 11 side questions were 0.989 and 0.984 respectively. Third, the assesment tool developed in this study was verified as a reliable tool since the ICC figure of every question showed more than 0.75. Therefore, the assessment tool developed in this study got validity and reliability of the questions to evaluate running jump heading movements of soccer players, and will be useful indicator to train and evaluate running jump heading skill correctly.
LDPC 부호화된 멀티유저 상향링크 Massive-MIMO 시스템의 반복 검출 및 복호 수신기
박진수(Jin Soo Park),김인선(Inseon Kim),송홍엽(Hong-Yeop Song),한성우(Sung Woo Han) 한국통신학회 2014 韓國通信學會論文誌 Vol.39 No.9(통신이론)
본 논문에서는 LDPC 부호화된 멀티유저 상향링크 massive-MIMO 시스템에서, 연판정 MRC 검출기와 LDPC 복호기를 이용한 반복적 검출 및 복호 수신기를 제안한다. 우선 MRC 검출기에 대해 연판정 기법을 제안하고, 검출기와 LDPC 복호기간 정보 교환 관계를 유도한다. 제안된 반복적인 검출 및 복호 과정을 통해 성능이 향상될 수 있음을 시뮬레이션을 통해 확인한다. In this paper, we propose an iterative detection and decoding scheme for the LDPC coded multiuser uplink massive-MIMO systems. We consider the simple maximal ratio combining (MRC) detector and LDPC decoder. We formulate the soft output of MRC detector and the relation between the extrinsic informations of the detector and decoder. The performance improvement of the proposed iterative detection and decoding scheme is shown by computer simulation.
김인기(In-ki Kim),김건희(Gun-hee Kim),송성우(Sung-woo Song),최가람(Ga-ram Choi),엄장원(Jang-won Eom),곽재준(Jae-jun Kwak),유영남(Young-nam You),정덕화(Deok-hwa Jeong),강지훈(Ji-hun Kang) 육군사관학교 화랑대연구소 2019 한국군사학논집 Vol.75 No.2
The purpose of this study was to analyze the differences in psychological and physiological factors between groups by classifying groups based on the 3km running record of fourth grade Air Force Academy cadets. Among the top 46 Air Force Academy cadets who wanted to participate in the study, the study conducted an open survey of the top 13 and the bottom 15 who wanted to provide the data prior to the study. The subjects of the experiment and in-depth interview were studied by a total of 18 people, 9 of each upper and lower members who wished to participate in the study. Psychological factors were structured through inductive content analysis of data extracted from in-depth interviews, and physiological factors were conducted to verify differences between groups of body composition and cardiopulmonary function. The psychological factors of the upper and lower groups were found to be general areas of performance strategy, achievement motivation, emotional response, military spirit, situation perception, and basic physical strength. In the detailed areas, the subjects were also examined in 15 areas including physical fitness indicators, confidence, condition control, task orientation, and positive self-perception. As a result of comparison between upper and lower groups, the upper group was 2.2 times higher than the lower group and the lower group was 1.7 times higher than the upper group in the military spirit and performance strategy of the general area response rate. In general area response, the ratio of mental strength and confidence was different in the general area of military spirit. In addition, the upper group in the achievement motivation showed a high percentage of task tendency at 47%, while the lower group showed a high rate of zero motivation at 50%. In the emotional response, the upper group showed an equal ratio, while the lower group showed an 81% ratio of negative emotions. In the overall response by sub-region, the negative emotions of the subgroup were high at 28%. In the body composition, BFM showed a statistically significant difference between upper and lower groups, and Weight, FFM, and SMM did not show any significant difference between groups. In cardiopulmonary capacity, VO2max showed a statistically significant difference between upper and lower groups, and VE and LT did not show significant differences between groups.
실크아미노산 섭취가 여자 중·고등학교 축구선수의 하지 근 기능에 미치는 영향
최종환(Choi, Jong-Hwan),안종선(An, Jong-Sun),송성우(Song, Sung-Woo) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.5
The purpose of this study was to find out the effect of the eight-week intake of silk amino acids on the muscular functions of the lower limb of female middle and high school soccer players. To achieve the purpose of the study, 20 female soccer players attending Chungju Y Middle School (3grade) and Y High School (1 to 3 grade) were selected as radio sampling methods and divided into experimental groups (10 intake silk) and comparative groups (10 intake placebo). The two groups lived in a dormitory during the intake period, ate the same nutrition, and homogenized the amount of exercise through team training. In the pre-test before the experiment, the subjects were tested for joint continuity to measure their lower extremities’ muscular functions, and eight weeks later, post-testing was carried out in the same way as the pre-test. Data processing was calculated by using the SPSS 12.0 statistics program and the Mann-Whitney U test was used to determine the mean difference between variables. The results showed a significant improvement in maximum muscle strength and muscle endurance compared to those who took placebo in groups that consumed silk amino acids for eight weeks. Therefore, it can be suggested that the eight-week intake of silk amino acids will improve the root function of female middle and high school soccer players and, by extension, provide effective nutrition for soccer players.