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민병찬,한정수,정순철,변증남,김지관,김철중,Min, Byeong-Chan,Han, Jeong-Su,Jeong, Sun-Cheol,Byeon, Jeung-Nam,Kim, Ji-Gwan,Kim, Cheol-Jung 대한인간공학회 2001 大韓人間工學會誌 Vol.20 No.3
In the present study, the correlation between subjective assessment and EEG for essential odors were investigated quantitatively. EEG signals were measured from 19 electrodes according to the International 10-20 system (Fp1, Fp2, F3/4, F7/8, Fz, C3/4, Cz, P3/4, Pz, T3/4, T5/6, O1/2) from 8 healthy males subjects for four odor(Rose oil bulgarian, Lemon oil misitano, jasmin abs, Laverder oil france (KIMEX co. Ltd) conditions. The result of the subjective assessment shows the most pleasant odor for each subject. and the power spectrum of ${\alpha}/({\alpha}+{\beta})$ of EEG signals from the most pleasant odor was compared with those from the control condition, which has no odor at all. Power spectrum of ${\alpha}/({\alpha}+{\beta})$ of EEG from the most pleasant odor was increased significantly at T4, T6 compared to the control condition. This result implies that the parameter, power spectrum of ${\alpha}/({\alpha}+{\beta})$, could be an important index for signifying the levels of pleasantness for odors.
실시간 주관적 감성 평가시스템을 이용한 긍정 및 부정 시각자극에 대한 연구
민병찬,정순철,민병운,신미경,정학기,김철중,Min, Byeong-Chan,Jeong, Sun-Cheol,Min, Byeong-Un,Sin, Mi-Gyeong,Jeong, Hak-Gi,Kim, Cheol-Jung 대한인간공학회 2001 大韓人間工學會誌 Vol.20 No.1
The present study the feasibility of the new subjective assessment devise; Real-Time Subjective Assessment Digitizer (RTSAD). The subjects were instructed to evaluate their sensibility during the presentation of the positive and the negative visual stimuli using RTSAD. After the presentation of each of the stimulus, a questionnaire was used for comparing the results with those from RTSAD. It was argued that the biggest utility of the RTSAD is the capability of measuring and figuring out the trends of the subjective assessment in real time. The results from the questionnaires unlike the results from RTSAD, reflects only the averaged human sensibility for the entire time of the presentation of the stimulus.
고농도 산소 공급이 노인의 인지 능력과 혈중 산소 포화도에 미치는 영향
김지혜(Ji-Hye Kim),신채호(Chae-Ho Shin),최윤정(Yoon-Jeong Choi),최미현(Mi-Hyun Choi),이수정(Su-Jeong Lee),양재웅(Jae-Woong Yang),민병찬(Byung-Chan Min),박세진(Se-Jin Park),정순철(Soon-Cheol Chung) 대한인간공학회 2010 대한인간공학회 학술대회논문집 Vol.2010 No.10
This study investigated changes in cognitive task performance and blood oxygen saturation (SpO2) of old people when the concentration and supply rate of oxygen administration were varied (21% (1L/min), 93% (1L/min), and 93% (5L/min)). It recruited totally 20 elderly subjects including 9 males (75.1±4.2 years) and 11 females (73.1±4.3 years). The experiment consisted of 1-back task performed under three conditions (21% (1L/min), 93% (1L/min), and 93% (5L/min)). Each run consisted of three phases: Adaptation of oxygen administration (3 min), Control (2 min), and 1-bak task (2 min). SpO2 [%] was measured during each phase. Higher concentration and supply rate of oxygen administration were associated with more pronounced increase in SpO2 and decrease in response time of 1-back task.
이수정 ( Su Jeong Lee ),민윤기 ( Yoon Ki Min ),김보성 ( Bo Seong Kim ),최미현 ( Mi Hyun Choi ),양재웅 ( Jae Woong Yang ),최진승 ( Jin Seung Choi ),전재훈 ( Jae Hoon Jun ),탁계래 ( Gye Rae Tack ),민병찬 ( Byung Chan Min ),정순철 ( 한국감성과학회 2009 감성과학 Vol.12 No.4
본 연구에서는 세 단계의 각성 수준이 3-back 과제 수행능력에 어떠한 영향을 미치는지 관찰하고자 하였다. 10명의 남자(평균 25.7±1.5세) 대학생과 10명의 여자(평균 24.5±1.8세) 대학생이 본 실험에 참여하였다. 집단검사를 통해 추출된 사진을 이용하여 세 단계의 각성 수준 즉, 긴장, 중립, 이완감성을 유발하였다. 모든 피험자는 각 각성 수준에 대해 한 번씩, 총 3번의 실험에 참여하였다. 안정1(2분), 각성유발사진제시1(2분), 3-back 과제1(2분), 각성유발사진제시2(2분), 3-back 과제2(2분), 안정2(2분)의 6단계로 실험이 진행되었고, 전 단계에서 피부전도수준(skin conductance level: SCL)도 함께 측정하였다. 3-back 과제의 정답률은 중립 조건일 때 가장 컸고, 이완, 긴장 조건 순서였다. 반응시간은 세 조건 간의 차이가 나타나지 않았다. 모든 구간에서 측정된 피부전도수준은 긴장 조건일 때 가장 컸고, 중립, 이완 순서로 나타남으로써, 사용된 각성유발사진이 적절한 각성수준을 유발하였음을 확인하였다. 본 연구결과로부터 인지 처리와 무관하게 유발된 긴장도의 증가나 감소는 과제 수행능력을 감소시킬 수 있다는 사실을 유추할 수 있다. This study tried to investigate how three levels of arousal affect performance of a 3-back task. Ten university male (age 25.7±1.5) and ten female (age 24.5±1.8) students participated in this experiment. Using pictures selected from a group test, three levels of arousal, i.e. tensed, neutral, and relaxed emotions, were induced. Each subject was run through the procedure three times, once for each arousal level. The procedure consisted of six phases for each arousal condition Rest 1(2 min), Picture 1(presenting emotion arousing photos for 2 min), 3-back task 1(2 min), Picture 2(presenting emotion arousing photos for 2 min), 3-back task 2(2 min), and Rest 2(2 min). Skin conductance level(SCL) of electrothermal activity was also measured during all phases of the experiment. The accuracy rate of 3-back task performance was the highest at a neutral emotional state, followed by relaxed and then tensed emotional state. There was no difference in reaction time(RT) among the three levels of arousal. SCL was the highest at a tensed emotional state, followed by neutral emotional state and then relaxed emotional state. Based on the results, it could be inferred that tension, induced by stimuli unrelated to cognitive tasks, decreases the ability to perform cognitive tasks.
최미현(Mi?Hyun Choi),김지혜(Ji?Hye Kim),이수정(Su?Jeong Lee),양재웅(Jae?Woong Yang),최진승(Jin?Seung Choi),탁계래(Gye?Rae Tack),이태수(Tae?Soo Lee),민병찬(Byung?Chan Min),정순철(Soon?Cheol Chung) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.2
The purpose of this study was to examine differences between male and female in heart rate due to 93% oxygen administration of the three levels (1L/min, 3L/min, and 5L/min). Ten healthy male (25.0±1.8years) and ten female (23.7±1.9years) college students were selected as the subjects for this study. The experiment consisted of three runs, i.e., the three levels of 93% oxygen administration, respectively. The each run consisted of three phases, i.e., Rest 1 (5min), Hyperoxia (10min), and Rest 2 (5min). Heart rate was measured throughout the three phases. Heart rate was decreased during hyperoxia compared to Rest 1 and 2. By increasing the supply rate of highly concentrated oxygen, △1 (decreasing rate of heart rate during hyperoxia compared to Rest 1) was increased. And △2 (decreasing rate of heart rate during hyperoxia compared to Rest 2) of male was lower than female, regardless of supply rate.
세가지 유량의 고농도 산소 공급이 60대 남녀의 혈중 산소 포화도와 심박동률에 미치는 영향
김지혜(Ji-Hye Kim),최미현(Mi-Hyun Choi),이수정(Su-Jeong Lee),양재웅(Jae-Woong Yang),전재훈(Jae-Hoon Jun),민병찬(Byung-Chan Min),이태수(Tae-Soo Lee),정순철(Soon-Cheol Chung) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.6
This study investigated differences in blood oxygen saturation(SpO₂) and heart rate(HR) according to flow rate, gender, and phase in males and females in their 60s when the supply of 93% highly concentrated oxygen administration was changed (lL/min, 3L/min, and 5L/min). It recruited totally 20 elderly subjects including 10 males(68.0±2.6 years) and 10 females (65.5±3.1 years). The experiment consisted of three phages of Rest 1(5 min), Hyperoxia(l0 min), and Rest 2(10 min), and SpO₂[%] and HR[bpm] were measured during all phages. SpO₂ was higher in Hyperoxia phase supplied with highly concentrated oxygen than in Rest phases. Higher flow rate was associated with more increase in SpO₂. HR was reduced in Hyperoxia phase compared to Rest phases. More supply of highly concentrated oxygen was associated with more decrease of HR. However, there were no differences in both SpO₂ and HR according to gender.
고농도 산소 공급량 변화에 따른 남/녀 혈중 산소 포화도의 차이
이정한(Jeong-Han Yi),최미현(Mi Hyun Choi),김지혜(Ji Hye Kim),이수정(Su-Jeong Lee),양재웅(Jae-Woong Yang),정순철(Soon-Cheol Chung),임대운(Dae-Woon Lim),이동형(Dong-Hyung Lee),민병찬(Byung-Chan Min) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.4
The purpose of this study was to examine differences between male and female in blood oxygen saturation due to 93% oxygen administration of the three levels (1L/min, 3L/min, 5L/min) Ten healthy male (25 0±1 8 years) and ten female (23 7±1 9 years) college students were selected as the subjects for this study The experiment consisted of three runs, ie, the three levels of 93% oxygen administration, respectively The each run consisted of three phases, ie, Rest 1 (5 min), Hyperoxia (10 min), and Rest 2 (5 min) Blood oxygen saturation sere measured throughout the three phases By increasing the supply rate of highly concentrated oxygen, rising rate of blood oxygen saturation was increased Blood oxygen saturation of female was higher than male regardless of supply rate of highly concentrated oxygen and phases
민병찬(Byung-chan Min),민윤기(Yoon-Ki Min),김영선(Young-Sun Kim),이범수(Beum-Soo Lee),김영수(Young-Su Kim),민수영(Su-Young Min),김보성(Bo-Seong Kim),강진규(Jin-Kyu Kang) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.1
Using driving simulator, we analyzed the driving behavior of an older driver on intersection and measured the pychological load to HRV. As a results, older drivers started to enter the more complex intersection on a great distance and on low velocity for safety driving. On the other hand, the value of HRV would be lower on more complex intersections. It suggested that an older driver allowed for his own losses of physiological and cognitive function and recognized low level of driving confidence relatively.
자동차 화상시뮬레이터에서 운전 중 동시과제 수행에 고농도 산소와 향 자극이 미치는 영향
지두환(Doo-Hwan Ji),민철기(Cheol-Kee Min),류태범(Tae-Beum Ryu),신문수(Moon-Soo Shin),정순철(Soon-Cheol Chung),강진규(Jin-Kyu Kang),민병찬(Byung-Chan Min) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.4
In this study, it was observed through the ability of performing secondary tasks and baseline fetal heart rate how the supply of lavender, peppermint and highly concentrated oxygen (40%) affected distraction due to the performance of secondary tasks in the driving environment. Twelve male university students conducted secondary tasks while driving in the environments (6 in total) mixed and designed with oxygen concentration (21%, 40%) and the condition of odors (Normal, Lavender, Peppermint). The test was proceeded in order of stable state (5mins), driving (5mins), and secondary tasks (1min), and by extracting ECG data from every section by 30secs, the mean value of baseline fetal heart rate was calculated. As a result of analysis, in the ability of performing secondary tasks, a percentage of correct answers showed no difference in oxygen concentration and the condition of odors (p > 0.05). In performance completion time, a percentage of correct answers decreased showing a statistically significant difference in the condition of odors compared with the condition where odors were not provided (p < 0.05). As for baseline fetal heart rate, in the comparison between sections, while performing secondary tasks, it increased showing a significant difference compared with stable state and driving state (p < 0.05). The effect of interaction was observed in oxygen concentration and the condition of odors. When odors were not provided, baseline fetal heart rate decreased in 40% oxygen concentration compared with 21% oxygen concentration (p < 0.05), however, when peppermint was provided, it increased in 40% oxygen concentration compared with 21% oxygen concentration (p < 0.05). In conclusion, the fact that the condition of odors increased the ability of calculation, and when only the highly concentrated oxygen was provided, parasympathetic nerve system was activated, however, when highly concentrated oxygen was provided with peppermint at the same time, sympathetic nervous system (sns) was activated, which had a negative effect on the autonomic nervous system was drawn.