为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较...为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较强,并随距离增加而增大,但增大趋势逐渐变缓;磁场强度最强区分布在主变压器南侧,在该方向上呈现先增大后减小的规律。电源柜正对方位上的电场强度随距离呈幂指数衰减;磁场强度随距离呈对数衰减。而笔记本电脑的电磁场较强区分布在其前后方10 cm范围内,在该范围外均随距离增加而减小。长期处在电磁辐射环境中的工作人员应采取必要的安全防护措施,以免危害健康。展开更多
Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper...Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper extremity pain, and overuse injuries. Thus, it is important to educate students on the best ergonomic position to use laptops. This study investigates the efficacy of a laptop ergonomic education session and its effects on graduate students’ knowledge and behaviors regarding proper laptop use. A convenience sample of control and experimental groups was used and consisted of 83 occupational therapy (OT), 63 physical therapy (PT), and 26 nurse anesthesia (NA) graduate students. The sample size was 172, with 94 graduate students in the control group and 78 graduate students in the experimental. All study participants completed an initial ergonomics questionnaire. The experimental group was given an ergonomics education session following the questionnaire. Approximately 4 weeks after both groups completed the initial questionnaire;a follow up questionnaire was administered. Results showed that subjects demonstrated a statistically significant improvement in ergonomics knowledge after they completed the ergonomic educational session. Some participants reported making adaptations to laptop positioning and equipment use following the educational session. Thus, participating in ergonomic education can positively influence awareness of body mechanics relative to laptop workstation design.展开更多
文摘为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较强,并随距离增加而增大,但增大趋势逐渐变缓;磁场强度最强区分布在主变压器南侧,在该方向上呈现先增大后减小的规律。电源柜正对方位上的电场强度随距离呈幂指数衰减;磁场强度随距离呈对数衰减。而笔记本电脑的电磁场较强区分布在其前后方10 cm范围内,在该范围外均随距离增加而减小。长期处在电磁辐射环境中的工作人员应采取必要的安全防护措施,以免危害健康。
文摘Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper extremity pain, and overuse injuries. Thus, it is important to educate students on the best ergonomic position to use laptops. This study investigates the efficacy of a laptop ergonomic education session and its effects on graduate students’ knowledge and behaviors regarding proper laptop use. A convenience sample of control and experimental groups was used and consisted of 83 occupational therapy (OT), 63 physical therapy (PT), and 26 nurse anesthesia (NA) graduate students. The sample size was 172, with 94 graduate students in the control group and 78 graduate students in the experimental. All study participants completed an initial ergonomics questionnaire. The experimental group was given an ergonomics education session following the questionnaire. Approximately 4 weeks after both groups completed the initial questionnaire;a follow up questionnaire was administered. Results showed that subjects demonstrated a statistically significant improvement in ergonomics knowledge after they completed the ergonomic educational session. Some participants reported making adaptations to laptop positioning and equipment use following the educational session. Thus, participating in ergonomic education can positively influence awareness of body mechanics relative to laptop workstation design.
