Assessing the cumulative effects of stress: The association between job stress and allostatic load in a large sample of Chinese employees

Job stress can lead to various system dysfunctions, but until now no reliable biomarkers for its assessment have been identified. Allostatic load (AL) is an index that enables the cumulative effect on the body of chronic stress to be assessed, and is derived from a set of relevant biological measures. In this study, a 13-parameter index (building on the original 10-item index) was used to examine the relationship between job strain and AL. Participants were 1219 healthy Chinese employees. Job strain was measured using the Job Content Questionnaire, and AL was assessed by various possible stress responses, including blood pressure, cholesterol, indicators of glucose metabolism, and hormone and inflammation markers. AL in the high job strain group differed sharply from that in the low job strain group. The AL score was positively associated with age and educational level. Several individual parameters also differed between the two groups. Men scored significantly higher on AL and cardiovascular and metabolic health outcomes, whereas for women the associations appeared in the biological indicators. Analyses indicated that decision latitude (DL) and job demands were significantly related to AL. Job demands correlated significantly with the primary biological indicators and DL with the secondary health outcomes. In conclusion, this study provides evidence of the value of measuring allostatic load in assessing the chronic effects of job stress.     

试析城市电力设施的布局规划思路及方法——以绍兴市市区电力设施的布局规划为例

电力设施是城市电力系统的重要组成部分,针对电力设施的布局规划,采用国内领先的规划策略和优化模型,在科学合理的负荷分布预测基础上,对城市变电站站址及廊道的结构进行全面优化,并提前将电网规划结果纳入城市规划中.     

浅谈“照相手机时代”摄影记者的生存之道

照相手机的发展使新闻图片采集过程平民化,新闻摄影空前的大众参与使新闻摄影领域的格局发生了根本性改变,这让专业摄影记者产生了极强烈的危机感.为此,专业摄影记者应积极面对激烈的竞争,提高理论文化素质,建立广泛通畅的信息网络,站牢日常报道的阵地,拼抢突发新闻的报道,多出精品,为受众提供更丰富、更优质的新闻照片.     

洋葱内表皮细胞骨架的显示及部分性质研究

本文利用洋葱内表皮细胞作为实验材料，观察细胞骨架结构．实验结果显示植物细胞骨架呈网状结构，分布在整个细胞质中；幼嫩细胞的细胞骨架比较密集，吸附较多蛋白质，须经多次洗涤后才可获得较为清晰的图片．进一步的研究表明，与幼嫩细胞的细胞骨架相比，衰老细胞的细胞骨架出现部分解聚的现象；幼嫩细胞的细胞骨架在低温条件下亦出现解聚现象．使用洋葱内表皮观察细胞的骨架结构为我们在简便、经济的条件下，通过普通光学显微镜观察骨架提供了可能．这种方法为今后进一步开展细胞骨架的功能研究奠定了基础．     

棘腹蛙性腺的发育与周年变化

本文讨论了湘西棘腹蛙的性腺发育与性腺成熟系数的季节变化。实验材料来自204只幼蛙和成蛙（其中雌蛙122只，雄蛙82只）。卵巢的发育可分为6期，雌性的性成熟年龄为3年；精巢的发育可分为5期，雄性的性成熟年龄为2年。每年的5～8月为棘腹蛙的繁殖季节。同时，在文章中也描述了发育各期生殖细胞的主要形态结构。     

有初始缺陷粘弹性压杆的蠕变屈曲

研究有初始缺陷粘弹性压杆的蠕变屈曲，讨论分析了瞬时临界载荷和长期临界载荷对粘弹性压杆蠕变屈曲的影响。     

石板坡大桥钢箱梁车载作用下局部应力分析

石板坡大桥主跨由钢箱梁与预应力混凝土箱梁组成。针对该桥钢箱梁桥面板局部受力复杂的情况，运用ANSYS软件建立了钢箱梁结构分析的空间有限元模型，分析了钢箱梁在车载作用下局部应力的分布特点。     

均布荷载作用下双面组合梁的滑移效应分析

利用基本力学方法对钢．混凝土双面组合梁在均布荷载作用下的滑移效应进行分析，推导得到了负弯矩区上、下交界面滑移沿梁长方向的表达式，并通过算例比较了双面组合梁与传统单面连续组合梁的滑移特点。计算表明，与传统单面连续组合梁相比，钢-混凝土双面组合连续梁不仅在负弯矩区提高了截面承载力，也使截面刚度得到了提高。     

列车蓄电池箱的有限元分析和实验测试

通过有限元建模，对列车电池箱进行冲击载荷的有限元分析，得出各个方向冲击应力和箱体变形，并和实验数据进行比较，为进行电池箱的优化设计提供参考。     

Understanding the 2001 UK census migration and commuting data: the effect of small cell adjustment and problems of comparison with 1991

Summary.  Origin–destination statistics have been produced from the last three UK censuses. The paper describes what is new about the 2001 census interaction data on migration and commuting, considers the disclosure control methods that were applied to cells containing small values and demonstrates the problems that are associated with making comparisons with 1991 data. The effect of small cell adjustment procedures on the interaction data sets is investigated by means of selective analyses at different spatial scales. Some recommendations are made in light of the problems that were manifest in 2001.