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

Journal of Ergonomic Technology (JET)
ISSN 2432-1575

Issues

A simple load sensor aiming applications of subsidiary behavior evaluation
Publish Date : 2015/03/01  Vol.15
Authors : 
Kaoru, SUZUKI, Faculty of Science and Engineering, Hose University
Hayato HIYAMA, KSP-SP Co., Ltd.
Takeshi OKADA, COMCO Corporation
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 15, No. 1, 1/5, 2013.

This paper deals with a simple and cost effective load sensor aiming applications of subsidiary behavior evaluation. A key device of the sensor is a force sensitive resistor, It is sold as 'force sensitive', haves as 'pressurized area sensitive' however. The authors combined the resistor with hemisphere shaped rubber feet and an electric circuit based on a current/voltage converter, and thus constructed the sensor. The sensors ere used to evaluate area of postural sway while performing VDT work with sitting posture. The areas obtained from proposed sensors were correlated highly with that obtained from traditional force plates.

Keywords: Postural sway, VDT work, Subsidiary behavior, Load sensor
Count : 235
Sound Environmental Improvement in Open Classroom by Sound Masking
Publish Date : 2014/03/01  Vol.14
Authors : 
Yutaka TOMITA, Fujita Health University
Kazutami SUKA, Keio University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 14, No. 1, 9/14, 2012

Recently many student experiment training rooms are becoming open type, in which partitions separate the rooms, and lecturers give instructions. Although in the open space experiment training rooms students feel open, easy to move and easy to arrange experiment subjects, voices of lecturers interfere so much and as a consequence the interference interrupt the lectures in next compartments.
To make better sound environment which does not annoy lectures was aimed by generating particular masking noise, which reduces the interference from other lecturers. The generated noise was kept at the same sound level as air-conditioning equipments.
so the best suited masking noise using multiple sound samples was devised.
This paper describes the outline and the assessment experiment of this sound masking system specific to our student experimental laboratory.
Count : 271
Effect of Thermal Information Presentation to Mouse for Photographic Image Browsing
Publish Date : 2014/03/01  Vol.14
Authors : 
Shigeyoshi Iizuka, Kanagawa University
Sakae Yamamoto,Tokyo University of Science
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 14, No. 1, 1/8, 2012.

Generally in the Web communication, we depend on the great amount of information
received from vision. When sensational information other than vision is used, it is effectively works
as a complementary feeling. This research focuses on the use of variations in temperature to
represent information expressively. The mouse with thermal capabilities is a device that becomes
warmer (colder) at a user's palm when the user clicks “warm” (“cold”) photographic images on a
computer screen. Each image has an associated thermal value. In this paper, the result of an
experiment indicates that the thermal expression to mouse affects a user's impression of images.
Key Words: Thermal information, Thermal mouse, Warm sense, Cold sense, Pair comparisons
method.
Count : 234
A Simple Power Spectral Analysis for Heart Rate Variability
Publish Date : 2013/03/01  Vol.13
Authors : 
Abbas Orand, Yutaka Tomita, Keio University
Report Outline : 
Technical note
Appeared on Ergonomics of Human System Interaction, Vol. 13, No. 1, 15/16, 2011.

Keywords: Fourier transform of unevenly spaced time series, Heart rate variability, Regression analysis, Confidence interval
Count : 854
Design and Development of a Myo-Electric Controlled Artificial Hand
Publish Date : 2013/03/01  Vol.13
Authors : 
Yasunari Hashimoto, Junichi Ushiba, Yutaka Tomita, Keio University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 13, No. 1, 9/14, 2011.

Faculty of Science and Technology, Keio University provides an opportunity for junior-high-school students to give a chance to attend a
course of "Design and Development of a Myo-Electric Controlled Artificial Hand" as well as other scientific and technological courses. Junior-high-school students who enrolled the course study neurophysiology, electric circuits, computer programming that are the equivalent level of sophomore or junior classes in university. With adequate assistance of senior university students, junior-high-school students overcame the difficulties of the topic enthusiastically. We concluded that it has benefits for junior high school, and their students who have intellectual curiosity and interest in this field.

Keywords: Artificial hand, Myo-electric control, Junior-high-school students, Hot Soup Processor
Count : 433
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