- 1、本文档共35页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
- 5、该文档为VIP文档,如果想要下载,成为VIP会员后,下载免费。
- 6、成为VIP后,下载本文档将扣除1次下载权益。下载后,不支持退款、换文档。如有疑问请联系我们。
- 7、成为VIP后,您将拥有八大权益,权益包括:VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
- 8、VIP文档为合作方或网友上传,每下载1次, 网站将根据用户上传文档的质量评分、类型等,对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
1 Sleep
We all know that the normal human daily cycle of activity1 is of some 7-8 hours sleep alternating with some 16-17 hours wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness2. Our present concern is with how easily and to what extent this cycle can be modified.
The question is no mere academic one.3 The case, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls insistently for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness,sleeping during the day and working at night. Unfortunately,it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 am one week, 8 am to 4 pm the next, and 4 pm to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another4,so that much of his time is spent neither working nor sleeping very efficiently.
One answer would seem to be longer periods on each shift, a month, or even three months. Recent research by Bonjer of the Netherlands, however, has shown that people on such systems will revert to their normal habits of sleep and wakefulness during the weekend5 and that this is quite enough to destroy any adaptation to night work built up during the week.
The only real solution appears to be to hand over the night shift to a corps of permanent night workers6 whose nocturnal wakefulness7 may persist through all weekends and holidays. An interesting study of the domestic life and health of night-shift workers was carried out by Brown. She found a high incidence of disturbed sleep, digestive disorder and domestic disruption among those on alternating day and night shifts,but no abnormal occurrence of these symptoms among those on permanent night work.
词汇:
alternate /oiltsneit/
您可能关注的文档
最近下载
- 苏教版五年级上册《我们的大脑》教学设计.docx
- 贵州省2024年高三年级4月适应性考试 地理试卷.docx
- GEUPS维护及故障讲课文档.ppt VIP
- 触摸屏技术的原理及应用.docx VIP
- 路桥施工计算手册.docx
- 年产50吨瑞舒伐他汀钙、5吨匹伐他汀钙、50吨恩格列净、50吨恩格列净中间体EM1、5吨贝曲西班马来酸盐、200吨阿托伐他汀中间体B-4、200吨瑞舒伐他汀中间体D-1等产品项目环境影响报告书.pdf
- 六年级美术上册《劳动最光荣》课件.ppt
- 抖音直播间1000个违禁词(一举夺葵版).docx
- 反渗透法海水淡化产品水水质控制指标及水质调整措施.pdf VIP
- 《论语》论仁、孝、君子、教育.doc
文档评论(0)