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

Journal of Ergonomic Technology (JET)
ISSN 2432-1575


The study of the effect of touch
Publish Date : 2004/04/01  Vol.4
Authors : 
Naoko SAITO, National Cancer Center Hospital
Yukari TAKEHANA, Hideaki SHIMADU, Chizuko OHGAWARA, Faculty of Health Science, Kyorin University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 4, No.1, 13/20, 1999.

The purpose of this study is to obtain the basic data on the effect of touch in nursing care. This study involved two experiments. The subjects in this study were 15 female students. These experiments examined the effect of touch during fixed painful stimulation. In the first experiment, we measured R-R interval and skin blood flow rate as physical indices. Then, we examined the State-Trait Anxiety Inventory (STAI) and responses to a questionnaire about changes in pain degree b y a touch as mental indices. In the next experiment, we measured these thresholds.
As a result, these experiments suggest that the touch with abundant susceptibility in each case may ease the mind and body, but not affect patient’s condition.
We thought that this study suggested the availability of touch for nursing care.

Keywords: Touch, R-R interval, Skin blood flow, STAI, Painful stimulation
Count : 118
Biomechanical analysis of lifting actions for nursing
Publish Date : 2004/04/01  Vol.4
Authors : 
Tadao ISAKA, Kenji SHIGETSHI, Ritsumekan University
Yasuhiro HAYAKAWA, Nara National College of Technology
Sadao KAWAMURA, Ritsumekan University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 4, No. 1, 8/12, 1999.

This study was designed to obtain the basic information about the machine of nursing and instruction methods of lifting actions for nursing. The subjects who participated in this study consisted of one skilled person working in a hospital and two unskilled students. They were requested to perform the nursing lifts in some conditions such as in case of low or high height beds. From the comparison between the skilled and unskilled persons, the characteristics of lifting actions in the skilled person were shown as follows; (1) the skilled person utilize the larger range of motion in the knee and hip joints, (2) the skilled person could reduce the vertical load (Fp) by the increasing the impulse in the horizontal plane, and (3) the muscle activities in the lower limb were totally used in well-balanced without a local intense muscle activity by using the multi-joint movement shown in the skilled person. From the obtained results, it is necessary to consider the teaching system of the technique in efficient lifting movements, and to develop the lifting machine which have a interface between nurses and patients.

Keywords: Lifting for nursing, Joint kinematics, Ground reaction force, Biomechanics
Count : 125
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 : 105
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 : 104
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 : 129
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