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김원택,류인평,Kim, Won-Tack,Yu, In-Pyong 대한화학회 1961 대한화학회지 Vol.5 No.1
In this study we found following fact. The properties of seed oil of Firmiana platonifola, Schott, et Endl. is quite different from that of china wood(Chinese Tung) oil. It belongs to the non-drying oil and chiefly consists of linoleo-dioleoglyceride and palmito-dioleoglyceride.
PMV 온열 환경과 조도가 시작업 성능에 미치는 영향에 대한 연구
김형선 ( Hyung Sun Kim ),김형태 ( Hyoung Tae Kim ),김형식 ( Hyoung Sik Kim ),곽원택 ( Won Tack Kuwak ),김진호 ( Jin Ho Kim ) 한국감성과학회 2014 감성과학 Vol.17 No.2
In this study, a questionnaire was developed to assess error search and correction tasks, and an analysis was performed on the accuracy of the tasks and the time required for their completion in order to identify the effects of LED light source illumination on visual performance according to changes in a predicted mean vote (PMV) thermal environment. In addition, a subjective evaluation was performed by conducting a survey on the level of visual fatigue experienced during the tasks. In the experiment, four types of PMV thermal environments were established according to PMV values in the temperature range of (17±1-29±1) °C and the humidity range of (50±5-60±5) %, and the LED light source illumination was divided into three types: 400lx, 700lx, and 1000lx. The experimental results confirmed that the accuracy of the error search (LED p value=0.058, PMV*LED p value=0.083) and correction tasks and the time required(LED p value=0.004, PMV p value=0.000) for their completion were affected by changes in both the PMV thermal environment and the LED light source illumination, whereas a significant difference in visual fatigue was observed only in the PMV thermal environment(p value=0.003). Key words: PMV thermal environment, LED source, Ocular fatigue, Visual performance improve.
뇌파와 심전도 분석을 기반으로 한 온열환경 및 조도가 재실자의 업무에 미치는 영향
김형선 ( Hyung Sun Kim ),임재현 ( Jae Hyun Lim ),김형태 ( Hyoung Tae Kim ),김형식 ( Hyoung Sik Kim ),곽원택 ( Won Tack Kuwak ),김진호 ( Jin Ho Kim ) 한국감성과학회 2014 감성과학 Vol.17 No.3
This research analyzed biosignals associated with the change of emotion from lighting felt by the occupants and task type under various indoor thermal environments and illuminance, and examined the biosignals` impacts on work. To this end, the indoor thermal environment was constructed on the basis of PMV (predicted mean vote) index value, and various indoor environments were created by changing the brightness of LED stands. In this manner, a variety of indoor environments were constructed, and experiments were carried out. This research evaluates the sensibility response to lighting through a questionnaire survey in the given environment and incorporates different types of error searches. In this way, changes were analyzed by measuring electroencephalogram (EEG) and electrocardiograms (ECG). As a result, all biosignals on the task type showed significant differences from the thermal environment change. When PMV index value was 0.8 (temperature: 25 ℃, humidity: 50 %), concentration and attention were the most activated. However, the biosignals did not show significant differences from the illuminance change. Concentration on an occupant`s work capability was confirmed to be closely related to the thermal environment. As for the subjective emotional response to lighting, the occupants felt comfort as illuminance was lower, while they felt discomfort as illuminance was higher. However, there were no significant differences from the thermal environment change.