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정순철,민병찬,전광진,이봉수,이정한,김철중,Chung, Soon-Cheol,Min, Byung-Chan,Jun, Kwang-Jin,Lee, Bong-Soo,Yi, Jeong-Han,Kim, Chul-Jung 대한인간공학회 2002 大韓人間工學會誌 Vol.21 No.3
In this study, emotion changes were induced by four imaginations- pleasantness, unpleasantness, arousal, relaxation and it was examined using subjective evaluation and analysis of the physiological signals of the central and autonomic nerve systems whether the intended emotions were appropriately achieved, and whether these emotion changes could be distinguished from the analysis of physiological signals. Each of the four imaginations was implemented on 32 subjects for 30 seconds, while that Electroencephalogram (EEG), Eelectrocardiogram (RSP) were measured, and a subjective evaluation was implemented following the completion of the measurement. The analysis of the subjective evaluation revealed that the subjects underwent the four clearly differentiated imaginations, and the pleasantness level was classified into four imagination stages, pleasantness>relaxation>arousal=comfort>unpleasantness, and arousal level was classified into four imagination stages in the order of arousal>unpleasantness${\approx}$pleasantness>comfort>relaxation. The analysis of the EEG revealed that three stages of pleasantness level, pleasantness>relaxation=arousal=comfort>unpleasantness were classified from the values of ${\alpha}/{\alpha}+{\beta}\;and\;{\beta}/{\alpha}+{\beta}$, and about tour distinguishable stages of arousal level were obtained from the autonomic nervous system responses following the order of arousal>unpleasantness${\approx}$pleasantness> comfort> relaxation. It was found that intended emotion could be induced from the imagination, and these induced emotion changes could be differentiated using the physiological signals of the EEG and autonomic nervous system.
운전 중 네비게이션 조작이 차량 통제 및 운전 동작 패턴에 미치는 영향
김한수(Han Soo Kim),문경률(Kyung Ryoul Moon),최진승(Jin Seung Choi),강동원(Dong Won Kang),이수정(Su Jung Lee),최미현(Mi Hyun Choi),민병찬(Byung Chan Min),정순철(Soon Cheol Chung),탁계래(Gye Rae Tack) 대한인간공학회 2010 대한인간공학회 학술대회논문집 Vol.2010 No.10
The purpose of this study was to evaluate the effects of the dual task while simulated driving. Fifteen healthy adults having 1 years driving experience were participated. Nine markers were attached on the subject’s upper and lower limbs. All subjects were instructed to keep 30meters distance with the front vehicle running at 80km/hr speed. Searching navigation were selected as the dual task. Experiment consisted of rest for 3 minutes, driving alone for 1 minute and driving with dual task for 1minute, and was defined driving and cognition blocks respectively. To indicate the effects of dual task, coefficient of variation(CV) of distance between vehicles and jerk-cost function (JC) were analyzed. CV was increased by 240.8% in searching navigation block. JC were increased at the drivers' elbow, knee, ankle and toe, especially the total mean JC of lower limbs were increased by 317.6% in searching navigation. Conclusively, Performing dual tasks while driving decreased the smoothness of motion with increased JC and disturbed the control of vehicle with increased CV.
운전 중 문자 메시지 전송과 네비게이션 검색이 운전 수행 능력에 미치는 영향: 50대 택시 운전자를 대상으로
김한수 ( Han Soo Kim ),최진승 ( Jin Seung Choi ),강동원 ( Dong Won Kang ),오호상 ( Ho Sang Oh ),서정우 ( Jung Woo Seo ),연홍원 ( Hong Won Yeon ),최미현 ( Mi Hyun Choi ),민병찬 ( Byung Chan Min ),정순철 ( Soon Cheol Chung ),탁계래 한국감성과학회 2011 감성과학 Vol.14 No.4
본 연구에서는 50대 택시 운전자를 대상으로 동작 신호인 Jerk-Cost function(JC)와 차간거리의 분산계수 (Anterior-Posterior Coefficient of Variation, APCV), 차선이격거리의 분산계수(Medial-Lateral Coefficient of Variation, MLCV)와 같은 차량 통제 데이터를 이용하여 운전 중 문자 메시지 전송 또는 네비게이션 검색과 같은 동시 과제 수행이 운전 수행 능력에 어떠한 영향을 미치는지를 알아보고자 하였다. 남성 14명과 여성 14명을 대상으로 실험을 진행하였다. 피험자는 일정 속도(80km/hr or 100km/hr)로 주행하는 선행 차량과 일정 거리 30m를 유지하며 주행하도록 하였다. 처음 1분간은 운전만을 수행하게 하였으며, 다음 1분 동안은 운전만을 수행하거나 운전과 함께 동시 과제를 수행하도록 하였다. MLCV와 APCV는 80km/hr와 100km/hr 주행 시 Driving only에 비해 Driving + Sending Text Message(STM)와 Driving + Searching Navigation(SN)에서 유의하게 증가하였다. JC 또한 주행 시 Driving only에 비해 Driving + STM과 Driving + SN에서 증가하였다. 본 연구를 통해 운전 경력이 길고 운전 전문가라고 할 수 있는 50대 택시 운전자도 운전만을 수행하는 경우에 비해 운전과 함께 문자 메시지 전송 또는 네비게이션 검색 과제를 수행하게 될 경우 동작 패턴이 거칠어지고 차량 통제가 어려워진다는 사실을 도출할 수 있었다. The purpose of this study was to evaluate the effects of secondary task such as sending text message (STM) and searching navigation (SN) using the variable indicating control of vehicle ((Medial-Lateral Coefficient of Variation, MLCV), (Anterior-Posterior Coefficient of Variation, APCV)) and motion signal (Jerk-Cost function, JC). Participants included 50s taxi drivers; 14 males and 14 females. Participants were instructed to keep a certain distance (30m) from the car ahead with constant speed (80km/hr or 100km/hr). Experiement consisted of driving alone for 1minute and driving with secondary task for 1minute. Both MLCV and APCV were significantly increased during Driving + Sending Text Message(STM) and Driving + Searching Navigation(SN) than Driving only. Also, JC was increased during Driving + STM and Driving + SN than Driving only. In this study, we found that even in the experts group who are taxi driver and have 25 years driving experience, the smoothness of motion is decreased and the control of vehicle is disturbed when they were performing secondary tasks like sending text message or searching navigation.