掲載論文閲覧:JETは専門家による査読のある、オープンアクセスの人間工学に関する科学雑誌です:Journal of Ergonomic Technology (JET)

Journal of Ergonomic Technology (JET)
ISSN 2432-1575

掲載論文閲覧

A study on relationship between key displacement-force characteristics and human sensation on thin keyboards
論文掲載日:2003/03/01  第3巻
論文著者:
Tyohji YOSHITAKE, Human Factors, IBM Japan
Tetsuo KATUURA, Department of Ergonomics, Faculty of Engineering, Chiba Univ.
論文概要:
Original article
Appeared on Ergonomics of Human System Interaction Vol. 3, No.1, 1/7, 1997.

This paper describes a study on the relationship between key displacement-force characteristics and human sensation on thin keyboards with a rubber switch mechanism. Six kinds of key switches were selected out of three notebook PC keyboards, and their key displacement-force curves were measured. Thirty-three participants were asked to evaluate five sensory degrees (i.e. key pressure, key travel, tactile feedback, key sound and key shakiness) of six key switches by using the magnitude estimation method. After the evaluations, they were also asked which keyboards are preferred most and worst. Analysis revealed that sensation on key pressure was significantly related to the force at the early stage (0.5 mm) of key displacement, but not to related to the force at the initial peak. It was also found that sensation regards key travel was correlated to the proportion of the travel distance to the initial dip to the full travel distance. These results contribute to the development of key switches to design-in an intended key feeling.

Keywords: Displacement-force curve, Key switch, Key feeling, Tactile feedback, Thin keyboard
ダウンロード回数:127 回
Production design taking designers’ intention into account to realize product function
論文掲載日:2002/03/01  第2巻
論文著者:
Eiji ARAI, Hidefumi WAKAMATSU, Osaka University
論文概要:
Original article
Appeared on Ergonomics of Human System Interaction Vol. 2, No. 1, 86/96, 1996.

Machine design is generally performed by many designers and engineers. They decide geometric shapes and design parameters of parts from different points of views. Product designers stand on how to realize the required functions, and process planners stand on the machinability of parts. This paper deals with the communication between product designers and process planners by adding the designers’ intention to the product model with use of functional features. Machining feature are extracted from the product model with functional features by using a new method called feature loops. Some machining conditions are aolso generated in the expert system where the designers’ intention is referred to realize the require functions. A case study is introduced to show the effectiveness of the proposal to integrate the product designers’ viewpoint and planners’ viewpoint.

Keywords: CAD, CAM, Product design, Production design, Designer’s intention
ダウンロード回数:115 回
Effects of fighting action video games on brain waves
論文掲載日:2002/03/01  第2巻
論文著者:
Takashi KAWAI, Kageyu NORO, School of Human Science, Waseda University
論文概要:
Technical note
Appeared on Ergonomics of Human System Interaction Vol. 2, No. 1, 82/85, 1996.
ダウンロード回数:123 回
Sitting postures and their discomforts occurred in a traditional and VDT work tasks
論文掲載日:2002/03/01  第2巻
論文著者:
Tosaku HATTORI, Kobe Design University
論文概要:
Original article
Appeared on Ergonomics of Human System Interaction Vol. 2, No. 1, 75/81, 1996.

This paper describes the background in which the working stress in the traditional print-motif cutting, so called Katatagami, and VDT works in a bank office. There existed postural problems that should be optimized according to reduce stresses.
The result of this study, problems concerning (1) sitting postures and their discomfort problems in work tasks occurred during the traditional Katagami cutting and the VDT work tasks, and (2) strategies of their reducing stresses extracted from the factors considering the necessity of the reducing discomfort postures in sitting and visual tasks, are referred. To solve above problems, by using analysis of working posture, gaze movements, EMG and eye mark camera measuring methods, toward optimize working stress are described in this paper.

Keywords: Working posture, Sitting posture, Stress, VDT work, Traditional work
ダウンロード回数:120 回
Questionnaire survey for nursing heavy duties – on the answer from the nursing labor in J.M.S –
論文掲載日:2002/03/01  第2巻
論文著者:
Yuko OKUBO, Momoe KONAGAYA, Jichi Med. School, School of Nursing
Koichi OGAWA, Tokyo Denki University
論文概要:
Technical note
Appeared on Ergonomics of Human System Interaction Vol. 2, No. 1, 73/74,1996.

Nursing care is one of the occupations which deteriorate low back pains. To analyze the cause of the pain, we performed a questionnaire survey. As the result, the pain occurred when tall nurses help patients sitting from standing position, and short nurses help them standing from sitting position. The opinions against introducing a helping machine in this field was only 3%.
Keywords: Low back pain, Nursing labor, Body mechanics
ダウンロード回数:134 回
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