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1.
Kalai Selvan Ramalingam Karmegam Karuppiah Shiamala Devi Ramaiya Vivien How Enoch Kumar Perimal Hassan Sadeghi Naeini Sivasankar Sambasivam Kulanthayan KC Mani 《人机工程学与制造业中的人性因素》2019,29(5):426-434
Many occupations require workers to stand for long periods of time without proper interventions, which causes discomfort in the back and lower limbs. Therefore, this study aims to assess the effectiveness in alleviating body muscle discomfort during prolonged standing through the use of a calf massager. This study was conducted among male workers at a manufacturer with production line workers and the list was obtained from the HR Department and simple random sampling was done by number categorization. A total of 100 respondents (50 respondents for both the control and the experimental groups) participated in this study. The experiment took place in a room with a similar setup for the production line. Each respondent was requested to perform the simulated task for 2 hr. For the experimental group, the calf massager was turned on every 15 min. At every 15‐min interval after turning on the calf massager, respondents from both groups were required to evaluate their discomfort level on a Borg's scale CR‐10 questionnaire. The results showed that the level of body discomfort among respondents in the experimental group reduced (20–30%) compared with that of the control group. Multivariate analysis results revealed that the discomfort rating for the lower back, knees, thighs, calves, and feet was significantly lower (p < .05) among the experimental group compared with the control group. For lower body parts, the lower back region was statistically significant (p < .05) at the 90th, 105th, and 120th min; the thigh region was statistically significant (p < .05) at the 120th min; the knee region was statistically significant (p < .05) at the 105th and 120th min; the calf region was statistically significant (p < .05) at all minute intervals except the 15th and 45th min, while the feet region, was statistically significant at the 105th and 120th min. Therefore, this study indicates that calf massage treatment is capable of reducing body muscle discomfort during prolonged standing and highlights the significance of calf massage. 相似文献
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本文从轧辊的材质、硬度,轧辊的设计和制造等方面概括论述了轧辊的特征与机械性能,以棒线轧机使用的轧辊为例阐述了轧辊设计与制造过程中应该注意的环节,并从金相学的角度来探讨轧辊热处理后的机械性能,从而找出延长轧辊工作时间的方法. 相似文献
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本文分析了常用除氧设备的利弊,选择海绵铁作为除氧介质,并利用即有设备改造成海绵铁除氧器。 相似文献
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连续方波脉冲电压下局部放电测量的研究现状 总被引:1,自引:0,他引:1
介绍了连续方波脉冲电压下局部放电测量的研究进展,尤其是与变频调速电机相关的研究现状。总结了目前国内外学者主要采用的测量系统,分析了部分目前仍然存在争议的结论及部分有待深入研究的内容。最后从实际应用出发,提出了几条延长变频电机绝缘寿命的方法。 相似文献
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阐述了炼油厂汽油和液化气脱硫醇装置间断运行的配碱泵机械密封寿命影响因素,重点在使用操作和日常维护方面给出分析与总结,并提出改进措施。 相似文献