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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Ergonomics Society of Korea
Journal Basic Information
Journal DOI :
The Ergonomics Society of Korea
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Volume & Issues
Volume 23, Issue 4 - Nov 2004
Volume 23, Issue 3 - Aug 2004
Volume 23, Issue 2 - May 2004
Volume 23, Issue 1 - Feb 2004
Selecting the target year
Development of an Automatic Expert System for Human Sensibility Evaluation based on Physiological Signal
Jeong, Sun-Cheol ; Lee, Bong-Su ; Min, Byeong-Chan ;
Journal of the Ergonomics Society of Korea, volume 23, issue 1, 2004, Pages 1~12
DOI : 10.5143/JESK.2004.23.1.001
The purpose of this study was to develop an automatic expert system for the evaluation of human sensibility, where human sensibility can be inferred from objective physiological signals. The study aim was also to develop an algorithm in which human arousal and pleasant level can be judged by using measured physiological signals. Fuzzy theory was applied for mathematical handling of the ambiguity related to evaluation of human sensibility. and the degree of belonging to a certain sensibility dimension was quantified by membership function through which the sensibility evaluation was able to be done. Determining membership function was achieved using results from a physiological signal database of arousal/relaxation and pleasant/unpleasant that was generated from imagination. To induce one final result (arousal and pleasant level) based on measuring the results of more than 2 physiological signals and the membership function of each physiological signal. Dempster-Shafer's rule of combination in evidence was applied, through which the final arousal and pleasant level was inferred.
The Performance of An Inspection System Providing 3D Spatial Proximity Data and Its' Design Considerations
Jeong, Gyeong-Ho ;
Journal of the Ergonomics Society of Korea, volume 23, issue 1, 2004, Pages 13~22
DOI : 10.5143/JESK.2004.23.1.013
Due to economical or technological reasons. humans are responsible for inspection functions in many cases. Humans. however. are rarely perfect. thus allowing non-confirming parts to be processed. As the attributes of interest or the variety of products increases. the inspection system becomes less effective because of the sensory and cognitive limitations of human inspectors. Any means that can support or aid the human inspectors is necessary to compensate for inspection difficulty. Augmented reality (AR) offers a new approach in designing an inspection system as a means to augment the cognitive capability of inspectors by providing the 3D spatial proximity between two information channels. The experimental results suggest that AR might be an effective tool that reduces inspection time without sacrificing the measuring accuracy.
Effective Navigation Aids in Virtual Environments
Im, Dong-Gwan ; Han, Seong-Ho ; Ryu, Jong-Hyeon ; Seon, Mi-Seon ;
Journal of the Ergonomics Society of Korea, volume 23, issue 1, 2004, Pages 23~38
DOI : 10.5143/JESK.2004.23.1.023
This study examines different types of navigation aids when a navigator performs target search tasks in Virtual Environments. The factors manipulated in this study include target information (None/Landmark). navigational difficulty (Easy/Difficult). and map types (None/2D Map/3D Map). Navigation performance was measured by using task completion time and the number of target locations that was remembered by the navigator. In addition, user satisfaction on the navigation aids was also measured by using a 7-point Likert's scale. The results showed that the user satisfaction on the landmark was high when the 3D Map was provided. The task completion time shortened when navigational difficulty was set at "easy." The number of remembered target locations was large when there was no landmark. It was also large with an easy navigation task. or a map (20 or 3D) provided. Guidelines for selecting navigation aids were proposed based on the results.
The Study on Musculoskeletal Effects of Heel Types
Lee, Chang-Min ; Jeong, Eun-Hui ;
Journal of the Ergonomics Society of Korea, volume 23, issue 1, 2004, Pages 39~48
DOI : 10.5143/JESK.2004.23.1.039
In terms of women engaged in clerical job. working time of the workers who mainly keep standing with their high-heeled shoes on has been increasing. According]y. they are exposed to many kinds of foot deformation caused by loads of lower back and lower extremities due to high-heeled shoes. The type of heels they usually wear are diverse though the hight is same. In this study. we investigated most women's favorite styles of shoes concerned with heights. types and contact areas of the heels. Hence. we designed three kinds of shoes for an experiment: their contact areas with ground are 1 cm2. 2-4 cm2 and over 9 cm2 according to the heel heights. respectively. To investigate the biomechanical effects. analysis of motion and EMG were applied to the experiments. In addition. foot pressure distribution was measured for more detailed analysis. Six healthy young women were participated in this experiments. The result showed the heel becoming higher and narrower increased not only fluctuation of CBM(Center of Body Mass). but also the load of low back muscle and lower extremities. Accordingly. there was significant difference among types of the heel in terms of the role supporting load of the body. though the height is same. Especially. the difference among the pressures on a foot was most significant. In conclusion. we verified biomechanical effects are related with the contact area of a heel with ground as well as the hight.
Analysis of Differences in Attention Allocation Patterns between Expert and Novice Pilots
Park, Sang-Su ; Kim, Gi-U ; Myeong, No-Hae ;
Journal of the Ergonomics Society of Korea, volume 23, issue 1, 2004, Pages 49~63
DOI : 10.5143/JESK.2004.23.1.049
In this study. differences in attention allocation patterns between expert and novIce pilots were investigated by a verbal protocol when pilots were engaged in a task during the instrument flight. Ten pilots including experts and novices were participated to conduct a pre-determined task(a fix-to-fix) on F-5E Cockpit Procedure Trainer Simulator. Experts show better performance as expected with more stable variations in speed. altitude. and attitude. In attention allocation patterns. novices allocated about 83% of attentional resources on the primary instruments (airspeed indicator. altitude indicator. and attitude) relating to the task of the basic flight while experts spent 57%. This difference in the availability of attentional resources allowed expert pilots to accomplish the task better than novices. In other words. training a pilot should consider a program for building up wider instrument scanning patterns to become an expert in a shorter time.