教育扩展与大学生就业率的变化

典型调查表明,就业率在教育扩展中呈现下降趋势,近二年研究生处于短缺或基本平衡状态,本科生处于就业困难状态,专科生处于就业危机状态,不同专业毕业生的就业率存在一定差异。这是我国人力资本投资的风险增大和信号性功能减弱的体现。应根据我国经济发展需要做好高等教育的合理规划,调整高等教育的扩招速度、层次结构和专业结构,规范就业率统计体系,以促进大学生就业。     

区域发展理论演进的纵向考察

作者依据历史走向,考察了区域发展理论的产生、发展过程,概述了农业区域发展理论、工业区域发展理论、中心地发展理论、区域产业关连发展理论、区域增长极理论、区域发展阶段性理论以及现代区域发展理论的主要流派,系统地揭示了区域发展理论的思维脉络。     

测量演练室-理论与实践教学结合的空间

工程测量是一门理论与实践紧密结合的课程,且仪器的实践操作是教学效果的关键,演练室教学达到理论和实践教学的双重功能,提高了教学质量,加快了教学进度。     

Robustness of Risk Maps and Survey Networks to Knowledge Gaps About a New Invasive Pest

In pest risk assessment it is frequently necessary to make management decisions regarding emerging threats under severe uncertainty. Although risk maps provide useful decision support for invasive alien species, they rarely address knowledge gaps associated with the underlying risk model or how they may change the risk estimates. Failure to recognize uncertainty leads to risk‐ignorant decisions and miscalculation of expected impacts as well as the costs required to minimize these impacts. Here we use the information gap concept to evaluate the robustness of risk maps to uncertainties in key assumptions about an invading organism. We generate risk maps with a spatial model of invasion that simulates potential entries of an invasive pest via international marine shipments, their spread through a landscape, and establishment on a susceptible host. In particular, we focus on the question of how much uncertainty in risk model assumptions can be tolerated before the risk map loses its value. We outline this approach with an example of a forest pest recently detected in North America, Sirex noctilio Fabricius. The results provide a spatial representation of the robustness of predictions of S. noctilio invasion risk to uncertainty and show major geographic hotspots where the consideration of uncertainty in model parameters may change management decisions about a new invasive pest. We then illustrate how the dependency between the extent of uncertainties and the degree of robustness of a risk map can be used to select a surveillance network design that is most robust to knowledge gaps about the pest.     

湖北省高校大学生浮躁心理现状调查

通过文献资料和问卷调查以及数理统计法等研究方法,对湖北省普通高校大学生浮躁心理的现状及表现进行了调查,在此基础上分析其产生的原因,并探讨消除这种心态的方法和措施。     

一种基于网格剖分的两点射线追踪方法

两点射线追踪是解决复杂地质结构下反射波射线正演的有效方法。在初至波层析射线追踪算法基础上，提出了一种两点射线追踪方法，利用层析网格对模型进行离散化，通过两阶段法射线追踪，分别对激发点和接收点按向前处理过程计算模型单元及节点的旅行时，两次时间相加作为最小旅行时，再在目的层界面邻域扫描最小旅行时子震源网格单元，用粒子群算法在该单元内扫描全局最小旅行时点，得到反射点位置与反射夹角，再利用向后处理过程运用旅行时线性插值算法，从反射点分别到激发点、接收点反向追踪射线路径，最后得到反射波两点射线路径。     

Increasing the effectiveness of time-use survey with qualitative methods: The analysis of time–space interaction

Time-use surveys have been rich data sources in many countries for a long time. Turkey was among the countries that realized the potential of time-use surveys quite late and completed the first national survey in 2006. Despite its importance for a wide range of issues and applications, the first survey has flaws in design, which reduce its effectiveness and reliability. This is mostly due to disregarding cultural factors while tracking the methodology of European examples. This study aims to propose more appropriate methods of gathering time-use data in the Turkish context through a field survey in Ankara, the capital city. A mixed methodology that combines quantitative and qualitative methods effectively was applied and used to enrich data. The influence of space use was stressed and leisure activities were utilized to exemplify the use and benefits of mixed methods.     

Nutrient intake in day workers and shift workers

Abstract

The 24-h dietary intake, nutritional status parameters and psychosomatic factors of two-shift, three-shift and day workers were compared. Estimations of the dietary intake (across a work cycle) were made by use of a nutrient database. No significant differences were found between the groups for a large number of nutritional variables: intake of energy; intake and percentage of energy from protein, fat, total carbohydrates and sucrose; intake of coffee; and intake and density of vitamins and minerals. Only minor differences were found between the groups with regard to the quantitative intake of alcohol and calcium, and with regard to the quality of the diet (percentage of energy from alcohol, density of calcium). The groups differed significantly with respect to attitude towards work hours (three-shift workers being most negative in their attitude) and sleep disturbances (shift workers being most negative). The three-shift workers were more evening-oriented and they had higher concentrations of glucose in their blood. It was concluded that work hours not related to nutritional intake—at least not when total amounts across time are considered. It was also concluded that work hours were not related to Body Mass Index or blood lipids: triglycerides, total cholesterol, LDL (low-density lipoprotein) cholesterol and HDL (high-density lipoprotein) cholesterol.     

Class and ideological orientations revisited: an exploration of class‐based mechanisms

Studies of the relationship between class position and political outlooks still only have a limited understanding of the class‐related mechanisms that matter for ideological orientations. This article presents a comprehensive analysis of the mechanisms that link class position and left/right and authoritarian/libertarian orientations. Besides main factors such as income, career prospects, job security, education, class origin and class identification, the significance of work‐related factors such as work autonomy, working in a team, a physically demanding job and a mentally demanding job is studied. The findings are based on a survey specifically designed for this purpose and collected in Sweden in 2008/2009. A great deal of the association between class position and left/right orientations is explained by socio‐economic conditions; different classes sympathize with policies that will benefit them economically. Another important factor is class identification. Work‐related factors also have relevance, but the effect of class position on left/right orientations works mainly through the remuneration system. Class position is also related to authoritarian/libertarian orientations. However, this relationship is less explained by socio‐economic position per se, but is rather an effect of the educational system and its allocation of the workforce into different class positions. It also turns out that work‐related factors do not explain the class effects; however, a physically demanding job shows a unique effect. Overall, our findings suggest that besides factors such as class position, income, education and class identification, we need to consider work‐related aspects to derive a more complete understanding of the distribution of ideological orientations in Western societies.     

媒体收视率调查公司样本户数据的商业秘密保护——对国内首例干扰样本户信息案件的分析

在对国内首起收视率数据侵权案件分析的基础上,对此类特殊经营信息的认定与保护提出法律建议;认为商业秘密的本质是信息,包含技术信息与经营信息;相对而言,技术信息比较"硬",更容易被理解和保护,而经营信息比较"软",往往难以界定,保护起来也更加困难;针对于从事媒体的收视率调查公司而言,其提供的调查数据就是其主营业务的产品,以数据所包含的信息为媒体提供服务,获得相应的报酬;该信息是生产要素、主导产品和企业财产,同时也属于商业秘密,应当受到保护。