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.     

变截面压杆的临界荷载计算

变截面杆件的临界载荷问题，其平衡方程为变系数微分方程，只有少部分的情况可以得到其解析解，采用改进的WBK法,计算了若干变截面压杆的临界荷载，并与有限差分法进行了对比，证实了其可靠性。     

FPK法在集总参数系统随机温度研究中的应用

应用FPK法研究了集总参数系统在对流和辐射环境下温度随机变化的规律。设激励是均值为0的白噪声且系统参数为常量，在与环境对流换热时，系统随机温度的均值不变，方差与系统时间常数的平方根成反比；在与环境辐射换热时，系统随机温度一般不呈正态分布，其中均值，均方值还与系统确定性温度有关，由此可知，当存在随机激励时，用有热惯性的测温系统精确测定动态温度是不可能的。     

亲水性膜的研制和亲水性研究

为了消除小片距、复杂片型高效表冷器在湿工况下运行时产生的“水塞”问题和进一步提高这类表冷器的热工性能,本文从凝结方式的理论分析出发,介绍了在表冷器上制作亲水性膜的方法,从理论上分析了这种亲水性膜的结构与亲水性的关系,从实践上给出了这种亲水性膜对表冷器的热工性能的新贡献,为研制高效紧凑式表冷器提供了可喜的前景。     

一种分级超结构换热器网络综合优化方法及其应用

对分级超结构换热器网络模型的温度计算提出了一种通用的精确解方法,同时得到了显式解析解,并以这一解析解为基础,设计了以遗传算法和模拟退火算法为主,结合最速下降法的混合遗传算法,此外还在算法中引进精英策略和结构变异策略.应用实例的计算结果显示了这一混合遗传算法对于换热器网络的参数和结构都具有良好的搜索能力.     

浅裂纹试样塑性位移与载荷关系的实验标定

本文用实验验证了对于两种中强度，低韧性的材料18MnMoNb10MnMoNbVCu，Ernst分离函数原理P＝g（a／W）H（△P／W）仍适用，并由此用实验标定了两种材料的浅裂纹试样的g（a／W）表达式，在此基础上，得到了浅裂纹试样塑性位移与载荷的函数关系式。     

后现代文化的热寂——论《熵》的艺术风格

美国后现代主义代表作家托马斯.品钦擅长将自然科学和人文科学巧妙融合,他在小说《熵》中把物理的第二热力定律运用到对人类世界的观测比喻,隐喻支离破碎的后现代文化和混乱无序的后现代社会,诠释秩序的不复存在,生动地描绘了世俗凡人盲目、烦躁、错位的生活状况和茫然、虚幻的追求,指出人类能量破坏性的释放,将最终导致熵的增加,隐喻后现代文化热寂的可怕前景。     

气-液界面处水合物膜形成过程的传热分析

通过对静止系统的气-液两相界面处水合物膜形成过程的分析，建立了一维水合物膜形成过程的传热数学模型，提出了根据气体的消耗率确定出水合物膜厚度随时间的变化关系，分析水合物的反应体系中各相的温度分布，明确了水侧温度分布规律．结果表明，强化水侧的传热效果对提高水合物的生成速率具有重要的意义．     

Mental load and work stress as two types of energy mobilization

A conceptual framework is presented in which mental load and stress are regarded as two distinct biobehavioural states in the work environment that differ in energy mobilization, mood and coping strategy. The framework combines two types of theory that are based on human performance research using laboratory tasks on the one hand and applied research in the work environment on the other. A high workload is regarded as an important but not a critical factor in the development of stress symptoms. Even under unfavourable conditions it is possible to work intensively and to be highly activated without feelings of strain or psychosomatic complaints. In contrast, working conditions that provide few possibilities for control and little social support or are associated with reduced well-being and increased health risks. The two states differ in activation, coping style and mood. A proper distinction is important not only for theory building but also for the reconstruction of the work environment. It may lead to recommendations that aim to enhance the work efficiency of employees while reducing the probability that stress responses will occur.     

双排双波浪带散热水箱传热性能研究

对双排双波浪带散热水箱的结构形式、换热和阻力试验结果进行了分析。采用非线性拟合法得到气侧的换热系数αa，并与桑塔纳管翅式散热水箱的气侧换热系数进行了对比，结果表明，此散热水箱具有较高的换热系数。