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M Kumashiro

Publications and source records attributed to M Kumashiro.

42 records · Page 3Linked to original sources
PubMed1976

[Work load due to stamping task as a simple repetitive hand work (author's transl)].

An experimental study was carried out on stamping task using no conveyers with short work cycle which was taken as featuring simple repetitive hand work. Each phase of this work was allowed to each subject. Seventeen healthy adults, 8 males and 9 females, were engaged in the 120 minutes, stamping task. They were tested by their function of concentration maintenance (TAF), by flicker frequency and 30 items of subjective symptoms as advocated by the Japan Association of Industrial Health. Quantities of work for each 10 minutes were calculated. The results obtained were as follows: 1) Number of stamped cards by male subjects was more than that by female subjects. 2) Pace of work performance in the female subjects was being kept more in balance with their capacity in comparison with the male subjects. 3) The results of TAF and FF tests showed that the body load in the male subjects were greater than in the female subjects.

Adult↗
PubMedDate not supplied

Strategy and actions for achieving productive aging in Japan.

The objective of this study was to develop basic strategies for determining the ideal form of corporate management that meets the needs of an aging work force, specifically with the intent to develop a method of calculating functional age, one of the determining factors of such strategies. A literature search was made of annual reports of research conducted jointly by the Association of Employment for Senior Citizens and Japanese corporations. We tested the physical, physiological, and psychomotor functions of 271 male workers ranging in age from 20 to 59, and we used the results to examine the means of creating a formula to calculate functional age. Many of the measures adopted by Japanese corporations to deal with aging involve job redesign. This category accounts for 58.5% of such measures in all research fields. Night vision, standing trunk flexion, timed vital capacity, systolic blood pressure, and jumping reaction time each have an important influence on functional age calculation.

Aging↗
PubMedDate not supplied

Design of a work system considering the needs of aged workers.

The aim of this paper is to explore and present a proposal for a new work system for the aged worker. The method of research used to establish the system was to observe, record, and measure the actions of sitting workers performing assembly operations on electrical products. An evaluation index used in this study was obtained by measuring the motion time, cycle time per product, and the workload (CFF: Critical Flicker Fusion Frequency and Subjective Symptom of Fatigue). The results lead to the new work system being identified and to the reduction of handling motion of get and place work and the work load. It was determined that the system is adaptable for aged workers.

Aging↗
PubMedDate not supplied

Power spectral analysis of heart rate variability in Type As and Type Bs during mental workload.

Recently several studies have suggested that there are differences in autonomic balance between Type As and Type Bs. This study evaluates a sympathovagal interaction in Type A (n = 8) and Type B (n = 11) male students during a mental arithmetic task by power spectral analysis of heart rate variability. The low-frequency component to high-frequency component ratio was significantly greater in Type As than in Type Bs during a resting period. No significant differences were found in heart rate changes and blood pressure between the two kinds of subject groups. The present findings indicate that there was a significant difference in sympathovagal balance between Type As and Bs. Type As showed dominant sympathetic activity.

Adult↗
PubMedDate not supplied

Power spectral analysis of heart rate variability in healthy young women during the normal menstrual cycle.

This study investigated the fluctuations of autonomic nervous activities during the menstrual cycle. Twenty college females were tested for cardiovascular reactivity to mental challenge during both follicular and luteal phases across two menstrual cycles. Power spectral analysis of heart rate variability (HRV) was used to examine the autonomic nervous activities. At baseline, although heart rate and blood pressure did not differ across the menstrual cycle, the low-frequency (LF) component in the HRV was higher and the high-frequency (HF) component in the HRV was lower during the luteal phase than during the follicular phase. The LF/HF ratio was also significantly greater in the luteal phase. These data suggest that sympathetic nervous activities are predominant in the luteal phase as compared with follicular phase. In addition, the power spectral analysis of HRV has more sensitivity than heart rate or blood pressure in assessing the slight fluctuations of autonomic nervous activities during the menstrual cycle.

Adolescent↗