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

Journal of Ergonomic Technology (JET)
ISSN 2432-1575

Issues

The preventive effect of raising legs on low blood pressure during caesarean section under lumber anesthesia
Publish Date : 2009/03/01  Vol.9
Authors : 
Shoichi MATSUDA, Saitama Cooperative Hospital
Kyoko SUZUKI, Tokyo Metropolitan University, Graduate School of Nursing, Kitasato University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 9, No. 1, 1/5, 2006.

When pregnant women have a caesarean section under lumber anesthesia, most of them develop low blood pressure because of a hyperbaric anesthetic. The purpose of this study is to demonstrate the preventive effect of a 20 centimeter footrest to raise their legs after beginning lumber anesthesia on low blood pressure. Out of 33 pregnant women, 17 raised legs and 16 did not. The average time before administration of drip containing a vasopressure (neosinejin: vasoconstrictive) was 4.7  3.9 (n = 17) minutes in intervention group and 5.3  10.6 (n = 16) minutes in control group. The average duration of a drip was 18.8  8.7 (n = 16) minutes in control group and 9.9  9.4 (n = 17) minutes in intervention group, about half as much. The total hemorrhage average during an operation had no statistical difference between intervention group and control group, 2740.0  333.3 (n=17) and 2704.5  493.2 (n = 16), respectively. This study suggests that raising legs of pregnant women has a preventive effect on low blood pressure without increasing bleeding under lumber anesthesia.

Keywords: Lumber anesthesia, Caesarean section, Pregnant women, Low blood pressure, Raising legs
Count : 112
Relationship between sitting comfort and the change of pressure distribution during sit-down motion
Publish Date : 2008/03/01  Vol.8
Authors : 
Goroh FUJIMAKI, Kageyu NORO, Waseda University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 8, No. 1, 7/12, 2005.

Recently, the end user comfort on seating has developed into an important issue. In this context, the studies on sitting comfort have increased its importance. Body pressure distribution is one of the most common measurements to evaluate sitting comfort, and it is said that this measurement appears to the objective measure with the most clear association with the subjective ratings. Many of the researchers have reported the relationship between seat comfort and body pressure distribution, and most of the reports concentrate on short-term and stable sitting. However, when evaluating seat comfort, especially seat cushion comfort, body movements and re-sits are often seen. It was considered that the change in condition of contact between seat and human body is important for evaluating seat comfort and discomfort. This paper was focused on the change of pressure distribution during sit-down motion, and the relationship between seat comfort and discomfort was discussed. Two hundred and ten volunteers participated on this research, and the result showed some characteristic changes in pressure patterns on comfort and discomfort conditions. The findings of this research would give some useful information for providing comfortable seats/chairs in th future.

Keywords: sSitting comfort, Body pressure distribution, Neural network
Count : 134
Determination of patterns in rolling-over movements by physical features of the elderly
Publish Date : 2008/03/01  Vol.8
Authors : 
Manami NOZAKI, Toho University
Reiko MITSUYA, Hisashi KAWAI, Kageyu NORO, Waseda University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 8, No. 1, 1/6, 2005.

In this aging society, in order to prevent the elderly from becoming bedridden, it seems effective to encourage them to roll over by themselves more frequently. To this end, it is desired to establish the criteria for selecting rolling-over movements that are individually suited to elderly people based on the physical problems. This study aimed to determine roll-over patterns by physical features, targeting 40 persons aged 65 or over. The analysis by Quantification Method II has revealed that the important points for predicting the ability to roll over and the roll-over patterns are the ability to lift one’s lower back, activities in their daily lives, grip strength, and body weight.

Keywords: Roll-over pattern, Physical characteristic, Quantification method II, The elderly
Count : 127
Determination of the roll-over patterns in bed based on the physical characteristics (First report)
Publish Date : 2006/02/01  Vol.6
Authors : 
Manami NOZAKI, Toho University
Goroh FUJIMAKI, Reiko MITSUYA, Yoshichika EBARA, Kageyu NORO, Waseda University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 6, No. 1, 9/14, 2003.

The objective of the present study is to identify roll-over patterns observed in healthy individuals and to classify roll-over patterns based on their associated physical properties. Each healthy volunteer (n=26) was asked to roll over from the supine position to the lateral position. Based on videotape findings and shifts in the distribution of body pressure roll-over motions were described and divided into four patterns. The results of canonical discriminant analysis with dummy variables showed roll-over patterns could be differentiated based on eight physical properties. The resuts of the present study provide clues for selecting and recommending appropriate roll-over patterns in clinical settings.

Keywords Roll-over pattern, Physical characteristic, Canonical discriminant analysis with dummy variables
Count : 118
Evaluating dual task user interface of in-car information tools by spatial auditor menu
Publish Date : 2007/02/01  Vol.7
Authors : 
Hidenobu TAKAO, Hiroaki ISHII, Kanagawa Institute of Technology
Kageyu NORO, Waseda University
Jun OSUGI, Pioneer Corporation
Kaoru SAKAI, Waseda University
Report Outline : 
Original article
Appeared on Ergonomics of Human System Interaction, Vol. 7, No. 1, 1/8, 2004.

This paper proposed evaluation of optimum user interface (UI) by auditory communication between human and machine. In a former study, some types error loops of missing voice recognition was triggered by a distortion error. To solove this problem, 5 types of UI for voice control in-car information tools are evaluated. The five group consisted of (1) ‘non-feedback recognition result’ group, (2) ‘feedback recognition result’ group, (3) ‘a menu of three choices composed by recognition candidates’ group, (4) ‘feedback recognition result and guidance with defined spatial sounds’ group, and (5) ‘menu of three choices independently localized by spatial sounds’ group. An experiment was executed under the dual task environment in which operated a driving simulator and manipulated experimented voice controlled car navigation system. Two factors, achievement ratio and instability of car-speed control ratio were evaluated. As the results, the group number 5 was the best achieved of all conditions. This result suggests that spatially informed sounds will beneficial to elaborate and organize auditory information efficiently.

Keywords: in-car information tools, Voice control, Binaural sounds, Dual task, User interface
Count : 124
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