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.     

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。     

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。     

谈清单计价模式下的造价控制

从保障建设单位利益出发,把握好项目招标及合同管理,抓好施工阶段管理,严把竣工决算审核关三方面来阐述清单计价模式下的造价控制.     

东西部公路使用效益的结构方程模型

为了解东西部地区公路线路基础设施使用效益的差异,从宏观层面建立了东西部地区客货运量与不同等级公路之间的结构方程模型,实证分析了东西部地区不同等级公路的使用效益。分析表明：东部地区除等外级公路以外,其他各等级公路的使用效益均高于西部地区;东部地区公路线路基础设施对货运量和货运周转量的效应均较大,西部地区公路线路基础设施对客运周转量的效应较大;由于经济发展阶段和产业结构特点不同,收费政策对东西部地区高速公路的使用效益产生了不同的影响。     

浅谈半刚性基层沥青路面轴载季节修正系数

考虑到不同季节轴栽作用效果的差异，本文以目前在公路上广泛应用的半刚性基层沥青路面为研究对象，在分析季节对路面材料设计参数影响的基础上。主要从土基回弹模量季节变化对路表弯沉的影响来确定路面轴栽季节修正系数．     

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。     

An Evaluation of Behavioral Health Compliance and Microbial Risk Factors on Student Populations Within a High-Density Campus

Abstract

Objective: The aim of this Canadian study was to assess student behavioral response to disease transmission risk, while identifying high microbial deposition/transmission sites. Participants: A student survey was conducted during October 2009. Methods: The methods included a survey of students to assess use of health services, vaccination compliance, and hygiene along with a microbial analysis of potential transmission sites targeting specific residence buildings on campus. Results: Results indicated that most students maintained that they were worried about H1N1 and reported making changes in hygienic behavior, with the majority not planning to be vaccinated. The microbial analysis indicated contamination of fomites in co-ed residences to be higher than either male or female student residences. Conclusions: A consideration of physical space along with behavioral factors is required in order to properly assess risk pathways in the establishment of an evidence-based infection control plan for universities and their contiguous communities.     

PCS网络中一种改进的呼叫建立算法

PCS系统中,用户漫游到非归属VLR覆盖区被呼时,系统将产生大量信令开销和数据库访问开销。该文为移动用户被呼提出了一种改进的缓冲呼叫算法来降低网络信令开销与数据库访问负荷和呼叫建立时延,建立了一种模型来分析其相关性能。与传统呼叫算法相比,改进呼叫算法能极大降低系统开销,具有较强的可行性。