Psychophysical conditions and hormonal secretion in nurses on a rapidly rotating shift schedule and exposed to bright light during night work

The psychophysical conditions of 15 young female nurses, working in a rapidly-rotating shift system (2-2-2-2), modified according to some psychophysiological criteria, and exposed to short period (4 × 20 min) of bright light (2350 Lux) during their night duty, were studied in order to evaluate their adaptation to night work and to test a possible positive effect on it of bright light. Subjective evaluations of work load and psychophysical conditions, performance measures, hormonal excretion (cortisol, 6-sulphatoxymelatonin and catecholamines), oral temperature and activity-sleep logs were taken during the shiftwork cycle, comprising one morning, one afternoon and two consecutive nights under normal and bright light. The results showed that this rapidly-rotating shift system had little effect upon the normal circadian rhythms of the body. Moreover, the lengthening of the night shift to 10 h can be considered to be acceptable, provided that work load is reduced and there are sufficient rest pauses available. On the other hand, the reduction to 7 h of the length of the day shifts and delayed start of the morning shift to 07:00 h appeared to be convenient both in relation to the work load and sleep duration. Some positive effects of bright light upon psychophysical conditions and performance efficiency were noted, while hormonal excretion and body temperature did not show any effect of bright light; in particular, melatonin excretion was not suppressed appreciably by the bright light used.     

"同一模版"的纪念章--试论陆天明"反腐三部曲"的英雄形象

反腐英雄是威权与公众互相认同的政治人物,他们对我国正在进行的政治体制改革进程起到了适当的范式与修正作用,因此就成为当前一批作家极力书写的对象,陆天明是这其中的佼佼者.但在陆天明的"反腐三部曲"中,英雄人物越来越模式化,越来越象"同一模板"浇铸出来的纪念章,具有"社会仪式"的政治效果,却失去了强劲的艺术生命力.     

宋代文论视野中的"趣"

"趣",作为我国古代文论的重要审美范畴,在宋代文学批评与理论视野中,首次得到大量运用与集中阐说,表现为在诗评中开始广泛出现;在诗论中得到阐说和提升;在词评中也得以引入.这标示出了"趣"作为古代文论审美范畴的成型.     

母语思维模式对大学英语写作教学的启示

以北京理工大学116名二语习得者为调查对象,以语言与思维模式的关系为依据,结合教学实际,从母语思维模式角度分析了其对大学英语写作教学的影响,从而说明在教学中帮助学生把握母语和目的语不同的思维模式、提高表达能力的重要性.     

Robust methods in econometrics

This survey of recent developments in robust estimation and inference is directed primarily toward econometricians. It is argued that many of the techniques in common use in econometrics are highly sensitive to unverified hypotheses. Recent progress in designing alternative robust procedures is described and some prospects for future developments are discussed.     

“S+V+R+O”双核谓词格框架研究

在“S +V +R +O”句式中 ,由于述语中心动词V价的不同、宾语的不同 ,补语R语义指向的不同 ,主语S、述语V、补语R、宾语O构成一个复杂的语义网络。弄清楚其中的语义网络 ,就可以着手建立“S +V +R +O”双核谓词格框架了。建立双核谓词格框架 ,可以促进对句子的理解 ,促进现代汉语格系统的建立     

浅谈网络环境下高校图书馆的发展模式

本文从四个方面概述了我国高校图书馆的发展现状 ,阐述了网络环境下高校图书馆的发展模式是在传统图书馆的基础上进化发展的。既有传统图书馆的社会基础和实体优势 ,又有“数字化图书馆”的一些基本特征。     

中国书法艺术的曲美之韵

中国书法从古文字发展到篆书、隶书、草书 ,再发展到楷书 ,虽“随体诘诎”的曲线趋于平直 ,但曲线之美的生命之形式与意蕴 ,却越来越深地沉淀于这契合宇宙自然之“道”的灵动圆活的曲线之中。中国书法艺术正是在这循环往复的曲线的流转运动中 ,生动地再现了客观事物及生命物体的形象美     

普通高校体育教学内容改革构想

普通高校体育教学内容在以“健康第一”及“终身健身”思想的指导下,改造竞技体育运动项目,吸取我国民族、民间传统体育,安排足够时间的体育与健康理论知识的传授。面向全体学生,调动其学习积极性,提高大学生身心健康水平与终身健身的意识。     

"编译原理"课程的教学探索

"编译原理"课程由于其理论难度及目前本科学生中普遍存在的各种思想误区,造成难以取得理想的教学效果.针对这一现状,从如何提高学习热情,利用形象化教学手段使抽象理论具体化,合理组织实验及课程设计内容等方面入手,提出了相应对策.