Issues : JET is a peer-reviewed, open-access scientific journal : Journal of Ergonomic Technology (JET)

Journal of Ergonomic Technology (JET)
ISSN 2432-1575


Perception of apparent depth in stereogram: an effect of horizontal rotation of cube on apparent depth
Publish Date : 2004/04/01  Vol.4
Authors : 
Tesuya KAJITANI, Bunka Women’s University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 4, No. 1, 1/7, 1999.

The experiment in this paper gives clear examples showing two cubes of different depth. Apparent depth is regarded here as the degree of recognizing the difference of two objects. The objects, cubes in this case, are deformed in depth in increments of 0.5% to  2%. Using this method, two kinds of experiments were carried out, namely, one using a pair of stationary cubes and the other using a pair of rotating cubes. The test was conducted on 30 average females of age between 10 and 23.
As a result, they could better recognize the difference of depth on a pair of rotating cubes than stationary ones.

Keywords: Stereopsis, Apparent depth, Motion parallax, Parallax, CAD, Computer
Count : 152
Human engineering technology applied to the international space station
Publish Date : 2003/11/01  Vol.3
Authors : 
Takao YAMAGUCHI, National Space Development Agency of Japan
Report Outline : 
Review article
Appeared on Ergonomics of Human System Interaction Vol. 3, No. 2, 26/34, 1997.

Crew members are exposed to many stress factors on orbit that they have not been exposed to or rarely encounter on the earth. The unique characteristics of the space environment, form a physical view point, are ‘vacuum environment’ and ‘zero gravity environment’. From a psychological view point, these characteristics are ‘isolation (physical/social)’ from the earth and ‘confinement’ in which crew members cannot easily escape from the space ship. Human engineering technology contributes significantly to the International Space Station (ISS) development by establishing counter measures for crew members. This paper specifies the applicability of the human engineering for the ISS considering the neutral posture of the crew member in zero gravity. It also clarifies guidelines for human engineering application to future manned space systems taking into account the experience gained form the ISS development.

Keywords: Zero gravity, Human engineering, International space station, Space environment
Count : 155
Wireless power transmission system for electrical stimulation
Publish Date : 2003/11/01  Vol.3
Authors : 
Shigeto IKEDA, Faculty of Science and Technology, Keio University
Naofumi TANAKA, Tsukigase Rehabilitation Center, Keio University
Satoshi HONDA, Faculty of Science and Technology, Keio University
Report Outline : 
Technical note
Appeared on Ergonomics of Human System Interaction Vol. 3, No.2, 9/13, 1997.

To investigate effects of long-term stimulation upon rat’s skeletal muscles, we developed a magnetically coupled wireless signal transmission system. The system consists of a stimulation pulse generator and a transmission coil outside the cage, and a receiving coil and electrodes implanted in a rat. By using an ac bridge circuit in the transmission side, the stimulation current was monitored from the outside. Following the stimulation, cross-sections of stimulated and contralateral TA muscles for NADH-TR were analyzed and found the fiber type transmission.

Keywords: Electrical stimulation, Rat, Muscle, Wireless, Coil, Fiber type transmission
Count : 185
A study of wide-angle perspective
Publish Date : 2003/11/01  Vol.3
Authors : 
Tetsuya KAJITANI, Bunka Women’s University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction Vol.3, No.2, 1/8, 1997.

To represent an object in wide angle, in general, the projection center is placed near the object and the perspective method is applied to compose a wide-angle representation. However, spaces such as kitchens are difficult to express in full through the use of conventional perspective methods. In such cases, irregular perspective drawings are sometimes prepared. However, that preparation is often dependent on the unique experience-based techniques of the designer. Therefore, we are proposing a method of perspective drawing preparation which can be used with existing CAD system and can represent even difficult spaces like kitchens. In this method, to prepare a wide-angle perspective drawing using a program (automatically) without changing the shape of the object, information concerning its depth (Z axis information) is exchanged with the information of the sides (X and Y planes) at the time that perspective transformation is performed.
In this report, we have incorporated independent parameters (ox, oy, oz) for each axis and parameters (dx, dy) for perspective exchange of the object centered on any point. In this way, the object (x, y, z) gives rise to a wide-angle perspective drawing (X*, Y*, 0).

Keywords: Computer, CAD, Perspective, Perceptual constancy, Visual angle, Wide-angle perspective
Count : 151
Present state and bases of KANSEI information processing
Publish Date : 2003/03/01  Vol.3
Authors : 
Shin’ya NAGASAQA, Ritsumeikan University
Report Outline : 
Review article
Appeared on Ergonomics of Human System Interaction Vol. 3, No. 1, 37/44, 1997.

Recently the whole society tends to attach importance to humanity and human life. One’s KANSEI such as feeling, sense, taste, preference and so on has been utilized to product design. Consequently the design technique has been adopted which the function or specification is decided according to measurement and analysis of KANSEI. And an approach to those technique by KANSEI information processing and KANSEI engineering has been focuse on and is discussed in this paper.

Keywords: KANSEI, KANSEI information processing, KANSEI quality
Count : 163
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