Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.     

面向基础教育课程改革的教师教育职前培养模式探析

在师范教育转型的过程中，师范院校应转变传统的人才培养观念。针对基础教育课程改革，积极进行教师教育职前培养模式创新探索，培养具有综合的学科知识和专业化教育水平的新型教师，适应基础教育课程改革的需要。     

试论清代两湖地区书院的刻书业及其兴盛原因

历代书院刻印的图书,在版本学上称为"书院本"。其版本价值较高,历来倍受文士学者重视。清代两湖地区的书院兴盛且日益官学化,书院刻书业比较发达,留下大量作品。究其原因,主要包括社会、政治、经济、文化和学术五个方面。     

A qualitative comparative analysis of strategies for an ageing society, with special reference to pension and employment policies

The primary purpose of this study is to typify the respondent strategies of the OECD countries based on the interconnected structure of income and employment guarantees. More specifically, this article seeks to typify welfare policies into four types (welfare-to-work, welfare emphasis, labour emphasis, market emphasis) based on the leniency of the pension system and active state intervention in employment security. With the resultant four types, this article then places them as the dependent variable while incorporating per capita GDP, aged dependency ratio, pension maturity level, union density, constitutional structure index and degree of decommodification as causal variables. Through this process, this article aims to derive the decisive variable for each type through qualitative comparative analysis.     

民族自治地方农村养老问题与对策初探——以黔东南州锦屏县为例

民族自治地方农村养老工作与构建社会主义和谐社会、社会主义新农村建设、“三农”问题等紧密相关，养老工作能否解决好直接影响到农村的社会稳定、社会的和谐发展和“三农”问题的解决。民族自治地方农村经济相对落后、经济发展不平衡、人口分布不均衡、农村老年人口日益增多、农民工大量外出等现实，给传统养老方式带来了历史性的冲击。这要求建立具有时代特色和地方特色的养老方式。本文在进行充分的实地调查、分析黔东南苗族侗族自治州锦屏县农村现行的养老方式现状、养老方式存在问题的基础上，结合当地实际情况和借鉴其他地方的成功养老方式，提出具体可行的对策。     

长三角近海海洋环境管理立法研究

长江三角洲经济区海洋经济发展势头强劲，但同时其近海也饱受海水水质恶化、赤潮灾害频发、海洋生态非健康等环境问题的困扰。长三角近海环境问题的解决需要一种特殊的环境管理方式，即区域海洋环境管理，这是海洋环境管理理论不断发展创新的成果，可以起到解决自然区域与行政区划之间的矛盾、协调多方利益和中观管理的有益补充作用。本文拟探讨通过贯彻区域海洋环境管理理念，创设适用于长三角毗邻海域的、针对海洋环境管理的区域性法律文件，来治理与维护这一海洋区域的环境，从而为其海洋经济发展创造有利条件，提供良好的环境依托，使发展走上可持续的道路。     

教学方法的多向度变革——《马克思主义基本原理概论》新教材教学法的研究与实践

为了创造性地贯彻《马克思主义基本原理概论》新教材的精神，课程组制定了“共性中创个性”的教学战略，在坚持共性、弘扬共性的基础上创造个性化教学特色，创造出了“坚持集体备课，鼓励多样化教学”的教学模式。     

约翰·福尔斯小说中的“剧中剧”

约翰·福尔斯的小说《魔法师》和《法国中尉的女人》在结构上模仿了莎士比亚《暴风雨》的“剧中剧”设置。这种设置给小说中的人物提供了一个“寻找自我”的舞台，福尔斯借此探索了人的自我本质以及个体自由，表达了存在主义人文关怀的创作思想。     

Ordinal utility models of decision making under uncertainty

This paper studies two models of rational behavior under uncertainty whose predictions are invariant under ordinal transformations of utility. The quantile utility model assumes that the agent maximizes some quantile of the distribution of utility. The utility mass model assumes maximization of the probability of obtaining an outcome whose utility is higher than some fixed critical value. Both models satisfy weak stochastic dominance. Lexicographic refinements satisfy strong dominance.The study of these utility models suggests a significant generalization of traditional ideas of riskiness and risk preference. We define one action to be riskier than another if the utility distribution of the latter crosses that of the former from below. The single crossing property is equivalent to a minmax spread of a random variable. With relative risk defined by the single crossing criterion, the risk preference of a quantile utility maximizer increases with the utility distribution quantile that he maximizes. The risk preference of a utility mass maximizer increases with his critical utility value.     

Analyzing mental health evaluation: moral and ethical dimensions

Now that evaluators have been sensitized to the importance of moral and ethical issues in their work, it is time to move beyond generalities and examine the moral and ethical implications of specific evaluation models in specific settings. This paper proposes a framework that can be used to examine moral and ethical dimensions of evaluation and illustrates it by analyzing a selected model of mental health evaluation. Such a systematic identification of moral issues can improve evaluation practice both proactively, by shaping the training of evaluators, and retrospectively, by contributing to meta-evaluation.