재활운동이 뇌병변 장애인의 정서변화에 미치는 영향

류광민(Ryu, Kwang-Min) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.2

Purpose: The purpose of this study is to examine the effect of rehabilitation exercise on the emotional change in disabled children with encephalopathy. Methods: Fourteen adolescents aged 10-18 years with cerebral palsy participated in this study. They were randomly assigned to a land rehabilitation exercise group (LRE, n=7) or an water rehabilitation exercise group (WRE, n=7). Mood states were measured by profile of mood states (POMS). Brain waves were measured by Electroencephalography (EEG). Two-way repeated Mixed ANOVA were applied to assess interaction effects of time by group on dependent variables. Results: Results indicate that WRE had lower resentment factor, but had higher vitality factor than those of LRE. EEG Theta was significantly increased in WRE between normally, pre-and post-tests, and was higher in WRE after post-tests of exercise compared to LRE. Alpha was also increased in WRE during the study. Conclusion: Consequently, Water rehabilitation exercise (WRE) can be useful to improve emotional changes in disabled children with encephalopathy.

야구 투구 동작의 구간별 정보가 구질파악의 정확성에 미치는 영향

류광민(Ryu Kwan-Min),박상범(Park Sang-Bum),김태호(Kim Tae-Ho) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4

The purpose of this study was to investigate in differences in accuracy pattern as cognitive ability, ball pattern and section information of each ball pattern by analyzing the effect of section information of baseball pitching action on the accuracy of identifying ball patterns. Twenty-one university baseball player(over 8 years in career) and sixteen university students(1-3 years in career) who are joining in baseball club participated in the experiment as subjects. They were repeatedly assigned to the sessions of baseball pitching action, including session 1, session 2, session 3, session 4, and session 5. Baseball players and baseball club students observed randomly a model performing videotaped actions for 60 times for all ball patterns, 20 times for each ball pattern. Just after observing each task, subjects were required to tell researcher ball pattern. Researcher recorded it on checklist. The maximum score a subject could get for each task was 4, resulting in a total maximum score of 20 for each ball pattern. Calculated averaged-score for each session of each ball pattern was analyzed by three-way ANOVAs (2 groups × 3 ball patterns × 5 sessions) with repeated measures on the last two factors. In the analysis of the accuracy pattern for curve ball, the baseball player's accuracy identifying ball patterns showed significant increase from session 2 and 3. But for straight ball and slide ball, the difference between baseball players and baseball club students as increasing sessions didn't show. Taken together, these results suggest that the accuracy of identifying ball patterns can be affected by both performer's cognitive ability, using pre-information effectively, and the characteristics of ball patterns and that cognitive ability as well as physical motor activity may also contribute to the improvement of motor performance.

상황인식 시 구체 및 비구체적 정보가 의사결정에 미치는 영향 : ERP 연구

류광민(Kwang-Min Ryu),김진구(Jin-Gu Kim),김우종(Woo-Jong Kim),임경식(Kyungshik Lim) 한국인지과학회 2011 인지과학 Vol.22 No.3

본 연구에서는 상황인식 시 구체 및 비구체적 단서가 테니스 선수의 의사결정에 어떠한 영향을 미치는 가를 조사하였다. 피험자는 미국 국가 테니스 등급 프로그램 중 수준이 3-4.5에 해당하는 사람들을 대상으로 하였다. 과제는 피험자가 테니스 단식수비, 단식공격, 복식수비 랠리 장면을 상황인식하다가 화면이 정지되면 가능한 빨리 예측방향을 예상하여 해당버튼(좌, 중, 우)을 누르는 것이다. 실험설계는 집단(3)×조건(3)×영역(7)에 대한 삼원분산분석을 실시하였다. 종속변수는 반응시간, 정확률, P300의 진폭과 잠재기였다. 연구결과 구체적 정보 집단과 비구체적 정보 집단이 통제집단보다 P300 잠재기는 짧고, 진폭은 더 큰 것으로 나타났다. 영역에는 Fz, Cz, Pz 영역의 진폭이 크게 나타났으며, 조건 간에는 단식수비조건이 단식공격 그리고 복식수비조건 보다 진폭이 크게 나타났다. 본 연구의 결과 독립변수로 제공된 비구체적 상황인식과 구체적 상황인식 정보는 피험자의 정보처리에 직접적인 영향을 미치는 것으로 나타났다. 또한, 본 연구의 결과는 사건관련전위가 상황인식이나 의사결정과정을 측정하는 도구로 사용될 수 있다는 것을 보여주었다. The purpose of this study was to examine the effects of nonspecific and specific cue on decision making during situation awareness. Participants were 36 male college students who were randomly assigned to one of three groups: (1) nonspecific situation awareness, (2) specific situation awareness, and (3) a control group. Every participant was in the level 3-4.5 according to American National Tennis Level Program. Participants were asked to watch tennis single defence, single offence, double defence rally and when the screen stops, they were required to push the button(left, middle, or right) appropriate for the ball’s direction to return as soon as possible. The experiment was designed to be analyzed for group(3)×condition(3)×area(7) using three-way ANOVA. The dependent variables were reaction time, accuracy rate, and amplitude and latency of P300. The result showed that the latency of the nonspecific situation awareness group and the specific situation awareness group was shorter and their amplitudes were higher than the control group. Fz, Cz, Pz were prominent among areas, and the single defence condition was more prominent than the single offence and the double defence condition. As a result of the study, it can be suggested that the information about situation awareness provided beforehand directly affects the brain’s information processing. In addition, it shows that ERP can be a useful index for studying situation awareness.

청년기 · 노년기 성인의 신체활동 참여가 정서인지에 미치는 영향

윤병탁,류광민,김진구 한국감성과학회 2017 감성과학 Vol.20 No.4

Physical activity has positive effects on cognitive functions by aging. However, it is rare to find research that have scientifically investigated the effects on the affective-cognitive function. Thus, this study aims to brainscientifically research its effects of physical activity on the affective-cognitive function of adults in adolescence and senescence. As subjects of this study, a total of 60 males adults in D region were selected, and then equally divided into four groups of young exercise group(25~35y/o), young non-exercise group(26~35y/o), old exercise group(60~70y/o), and old non-exercise group(60~70y/o). As experiment tools, the EEG measuring equipment and International Affective Picture System(IAPS) were used. The experiment of this study used an affective-cognitive task where subjects pressed a button depending on emotional valence(positive, neutral, negative) shown in thepictures. During the task, EEG measured eight areas(Fp1, Fp2, Fz, C3, C4, Cz, T3, T4) out of brain areas in accordance with the international 10-20 electrode system, EEG was measured. For statistical analysis, a three-way ANOVA on 4(group)×3(stimulus)×8(area) was conducted. The results showed main effects of group in both reaction time and accuracy, and also in the latency of P3. And there was an interaction between group and stimulus the amplitude of P3. In conclusion, Physical activity has positive effects on the affective-cognitive function of people in adolescence and senescence. 신체활동은 노화로 의한 인지기능 저하에 긍정적 영향을 미친다. 하지만 신체활동 참여가 정서인지기능에 미치는영향을 과학적으로 밝혀 낸 연구는 드물다. 따라서 본 연구의 목적은 청년기와 노년기 성인의 정서인지 기능에 신체활동참여가 어떠한 영향을 미치는지를 뇌 과학적으로 연구하는 것이다. 연구의 피험자는 D 광역시 성인 남성 60명으로선정하였으며, 청년 운동 집단(25∼35살), 청년 비 운동 집단(26∼35살), 노년 운동 집단(60∼70살), 노년 비 운동집단(60∼70살) 4개의 집단으로 구성하였다. 실험도구는 EEG 측정 장비와 국제정서사진체계(International AffectivePicture System: IAPS)를 사용하였다. 본 연구의 실험과제는 사진으로 제시하는 세 가지 정서자극(긍정적, 중립, 부정적)에 적합한 버튼을 눌러 정서적인지 검사를 실시하였다. EEG 측정은 8개(Fp1, Fp2, Fz, C3, C4, Cz, T3, T4)의 영역을측정하였다. 통계처리는 4(집단)×3(자극)×8(영역)에 대한 삼원분산분석을 실시하였다. 결과: 본 연구 결과, 반응시간과반응정확률 그리고 P3 잠재기는 집단간 주효과가 나타났다. 그리고 P3 진폭은 집단과 자극간 상호작용이 나타났다. 결론: 신체활동은 청년층과 노년층의 정서적 인지기능에 긍정적인 영향을 미치는 것으로 나타났다.

숙련도와 거리에 따른 골프퍼팅 전 정신적 준비기 뇌활성화 비교

고지현,류광민 중앙대학교 학교체육연구소 2024 Asian Journal of Physical Education of Sport Scien Vol.12 No.1

The purpose of this study is to compare brain activation in mental preparation before performing golf putting tasks according to golf proficiency. The subjects consisted of 15 professional golfers, 15 amateur golfers, and 15 beginners. The task is to perform a total of 120 golf putts, 40 times each for 1m, 3m, and 5m. When the preparation signal was presented for 2 seconds before golf putting, CNV was measured at the stage of planning an appropriate movement. The motor area (F3, F4, Fz), the primary sensorimotor cortex (C3, C4), the supplemental motor (Cz), and the parametric medline (Pz) were measured in the measurement area. As a method of analyzing the putting result, 2-way ANOVA was performed for 3 (group) × 3 (putting distance). As a CNV analysis method, 3-way ANOVA was performed for 3 (group)×3 (putting distance)×7 (area). As a result of the analysis, it was found that the professional group had lower absolute error and variable errors than other groups. As a result of CNV analysis, the professional group had higher CNV waveform than other groups, and the amateur group had higher CNV waveform than the beginner group. The conclusion of this study shows that the professional group has high accuracy and consistency in performance due to its excellent ability to efficiently construct the neural mechanisms of information processing, memory, and decision-making processes necessary for successful golf putting with experience accumulated through years of practice.

Effect of Climate on the Number of Visitors to National Parks Using Korea Tourism Climate Index

김상태,류광민,김현정,김남조 (사)한국관광레저학회 2019 관광레저연구 Vol.31 No.5

The purpose of this study was to investigate the relationship between Korea Tourism Climate Index (KTCI) and the number of visitors to national parks. The results of the regression analysis showed that the regression models for weekday and weekend in 4 seasons for both Bukhansan and Seoraksan were statistically significant. However, the R2, which measures the explanatory power of a model, of Bukhansan was higher than that of Seoraksan. In particular, the explanatory powers of summer, fall and winter of Seoraksan were found to be very low (summer weekday 1.5%, fall weekday 1.5%, fall weekend 8.9%, winter weekday 3.7%). The regression coefficients of weekday and weekend in 4 seasons for Bukhansan and Seoraksan were found to be statistically significant. It is thus considered that KTCI affects the number of visitors to national parks. However, it can be inferred that social factors, such as vacation, in addition to the climate factor, affects the number, considering the explanatory power of weekday and weekend of Seoraksan. Therefore, future studies need to improve the validity of the model by adding social factors.

축산현장에서 발생된 암모니아 기체의 흡착기반 회수 동향 및 향후 전략

채상엽,류광민,이상훈 한국자원리싸이클링학회 2023 資源 리싸이클링 Vol.32 No.6

본 연구에서는 축산 분야에서 배출되는 암모니아를 효과적으로 회수할 수 있는 흡착기술의 연구개발 동향 및 향후 전략에 대해 논의하였다. 적절한 암모니아 흡착제는 표면의 산성기나 수소결합기를 가지며 높은 비표면적과 암모니아 흡착에 적절한 표면구조를 지니어야한다. 일반적인 암모니아 흡착제로는 활성탄이나 제올라이트 등의 광물질이 널리 쓰이나 대체로 흡착효과가 낮아 표면 개질 등을 통한 개선이 필요하다. 일례로 금속염화물이 다공성 흡착제에 포함되었을 때, 활성탄이나 제올라이트의 표면에 흡착 시보다 암모니아 흡착량이더 증가하는 것으로 알려져 있다. 최근에는 MOFs (Metal-Organic Frameworks)나 POPs (Porous Organic Polymers) 같은 새로운 종류의흡착제가 개발 및 적용되고 있으며 조절가능한 높은 비표면적과 다공성으로 매우 높은 암모니아 흡착용량을 보였다. 그 외에 프러시안 블루가 높은 암모니아 흡탈착성능 및 선택성을 보였는데. 이는 축산폐기물 배출 암모니아 회수에 관련하여 상대적으로 유리한 측면으로 보인다. 향후 다양한 흡착제를 이용, 축산현장에 맞는 조건에서 암모니아 흡탈착 효율 및 순도를 평가하는 연구가 더 활발히 진행되어야 할것이다. 아울러 암모니아 회수를 극대화하기 위한 효과적인 전/후처리 공정도 병행되어야 한다. This study discussed the trend and future strategy of adsorption technology R&D to effectively recover ammonia emitted from the livestock fields. A proper ammonia adsorbent should incorporate acidic or hydrogen bonding functional groups on the surface, as well as a high specific surface area and a good surface structure appropriate for ammonia adsorption. Activated carbon and minerals such as zeolite have widely been used as ammonia adsorbents, but their adsorption effects are generally low, so any improvement through surface modification should be necessary. For example, incorporation of metal chloride included in a porous adsorbent can promote ammonia adsorption effectiveness. Recently, new types of adsorbents such as MOFs (Metal-Organic Frameworks) and POPs (Porous Organic Polymers) have been developed and utilized. They have shown very high ammonia adsorption capacity because of adjustable and high specific surface area and porosity. In addition, Prussian Blue exhibited high ammonia adsorption and desorption performance and selectivity. This looks relatively advantageous in relation to the recovery of ammonia from livestock waste discharge. In the future, further research should be made to evaluate ammonia adsorption/desorption efficiency and purity using various adsorbents under conditions suitable for livestock sites. Also, effective pre- and/or post-treatment processes should be integrated to maximize ammonia recovery.

RGP 렌즈 착용한 대학생의 각막곡률반경 측정

김창식(Chang Sik Kim),류광민(Kwang Min Ryu) 한국안광학회 2006 한국안광학회지 Vol.11 No.3

운동학습,제어,발달 : 예측타이밍 과제 학습 시 증가 및 감소 피드백의 양면성

김진구 ( Jin Gu Kim ),류광민 ( Kwang Min Ryu ) 한국스포츠심리학회 2015 한국스포츠심리학회지 Vol.26 No.4

Purpose: The purpose of this investigation was to determine the double sided character of faded and increasing feedback on an anticipation timing task. Methods: Thirty-six undergraduate students(male = 36) whose age raged from 19 to 21, with a mean age of 19.8 years participated in this experiment. All participants were recruited from elective physical education activity classes volunteered to be participants. Participants were randomly assigned into one of three experimental conditions: (1) faded, (2) increasing, and (3) control condition. Task was to hit the enter key on a keyboard when the time arrived at 15 seconds on the screen. Participants performed 12 trials of 4 blocks in the acquisition, 12 trials of 2 blocks in the retention and 12 trials in the transfer phases, respectively. Results: Dependent variable were absolute, variable and constant error. The results of this study revealed that faded and increasing feedback schedules are beneficial for performance, learning and transfer on an anticipation timing task. Conclusion: Contrary to our expectation, we found that both faded and increasing feedback schedules have no double-sided character, which means that starting with faded or increased feedback did lead to better performance, learning and transfer.

사격 조준시간 고정훈련에 따른 뇌파와 심박 수 변화

이건영(GunYoungLee),김진구(JinGuKim),류광민(KwangMinRyu),우민정(MinJungWoo) 한국체육학회 2013 한국체육학회지 Vol.52 No.6

본 연구에서는 조준시간 고정훈련이 사격선수의 조준동안 뇌 활성화, 심박수, 조준시간, 그리고 사격점수에 어떠한 영향을 미치는지를 조사하였다. 13명의 고등학교 사격선수 (남=12, 여=6)가 실험에 참여하였고, 이들의 평균 연령은17세(M=17.8)로 평균 경력은 4.2 년이었다. 본 연구의 과제는 10 m 공기권총 사격으로 연구에 참여한 피험자들에게8주간 조준시간 고정 훈련을 실시하였다. 피험자들이 10 m 공기권총 사격 60발 수행을 실시하는 동안 지속적으로 대뇌 피질의 활동과 심박 활동을 실시간으로 측정하였다. 실험설계는 측정시점(2)×영역(8)에 대한 반복측정 이원분산분석을 실시하였다. 종속변수는 각 영역에 대한 세타, 로우알파, 하이알파, 알파, 로우베타, 하이베타, 베타, 감마 파워 값이다. 그리고 심박수와 사격점수에 대한 훈련효과는 반복측정 일원분산분석을 실시하였다. 실험결과 조준시간표준편차는 훈련 후가 훈련 전보다 편차가 낮게 나타났다. 그리고 심박수 변화의 편차는 훈련 후가 훈련 전보다 감소하였다. 전두엽 영역에서 세타 상대 파워는 감소하였고 베타 상대 파워는 타겟을 조준하는 동안 증가했다. 이러한 결과는 조준시간 고정 훈련이 조준과정의 안정성과 사격수행의 향상에 영향을 미친 것으로 여겨진다. The purpose of this study was to investigate the effects of aiming time fixation training on cerebral cortical activity, heart rate, aiming time, and air-pistol shooting performance. Thirteen high-school shooters (male=7, female=6) participated in this experiment and their average career was 4.2 years of experience. Their ages ranged from 17 to 19 years (M=17.8). Participants enrolled in a 8-week training program. Experimental task was 10m air-pistol shooting. Continuous cerebral cortical activity and heart rate activity were monitored while they perform 60 trials. Repeated two way ANOVAs have been conducted to see the influence of trainning on powers of theta, low-alpha, high-alpha, alpha, low-beta, high-beta, beta, gamma band at F3, F4, C3, C4, T3, T4, Fz, and Cz electrode sites. Repeated one way ANOVA have respectively conducted to see the influence of training on heart rate, shooting scores. As the result, shooting score and consistency of aiming time were higher in after training relative to before training. and deviation of heart rate fluctuations decreased after training. In the frontal area, theta relative power decreased and beta relative power increased during aiming the target. This result implies that aiming time fixation training increase shooting score by elevating the stabilization of aiming procedure.