当代组织中的工作压力管理

本文从管理心理学的角度分析了工作压力的内涵及其来源,阐述了工作压力产生的积极和消极影响,并为组织的领导者提供了工作压力管理的一些建议,以提高工作绩效.

Health Effects of Radiation Exposure to Human Sensitive Organs across Some Selected Mining Sites of Plateau State,Nigeria

The association of radiation with matter,being it from external means(i.e.external sources)or from internal pollution of the body by toxic substances,can pose biological hazard which may show the clinical symptoms later.The nature and extent of these symptoms and the time they take to appear are a function of the amount of radiation absorbed and the rate at which it is received.This study aimed at assessing the health effects of radiation exposure to human sensitive organs across some selected mining sites of Plateau State Nigeria.Finding of this study have revealed that the mean Dorgan values for the lungs,ovaries,bone marrow,testes,kidney,liver and whole body for different mining points of Plateau State are 0.29 mSv/y,0.26 mSv/y,0.31 mSv/y,0.36 mSv/y,0.28 mSv/y,0.21 mSv/y and 0.30 mSv/y respectively.From the findings presented,it can be concluded that the background radiation in Plateau State is not an issue of health concern in regards to sensitive organs and may not course immediate health effect except when accumulated over long period of time which may cause cancer to the indoor members on approximately seventy years of exposure.

2011年烟台四十里湾微微型金藻褐潮分析

依据烟台四十里湾赤潮常规监测资料及烟台金沙滩旅游度假区气象观测资料,分析了2011年四十里湾褐潮特点及环境背景。褐潮原因种为微微型金藻Aureococcus anophagefferens;褐潮特点为:海水棕褐色,透明度低,发生于春夏季节,持续时间长,分布范围广,导致扇贝滞长或死亡。5月下旬,水温16℃左右,海水中N严重富营养化,为褐潮藻生长提供了适宜的水文条件及营养物质基础;浮游植物物种多样性指数仅为0.47,群落稳定性差,为褐潮藻大量繁殖提供了契机;又恰逢连续多日阴雨、低光照天气从而引发褐潮暴发。异养及自养的混合营养方式使褐潮藻在低透明度环境中占据生态优势,持续生长3个月。高含量的P非褐潮暴发的必要条件。褐潮藻的兼养模式使海水pH、DO不似自养藻类赤潮因光合作用而大幅度上升。大量繁殖的海洋细菌积聚微藻细胞、有机及无机碎屑等黏附于扇贝网笼及扇贝体,妨碍扇贝呼吸及摄食,导致扇贝生长缓慢甚至死亡。