大学生心理健康教育与高校图书馆

当前大学生心理健康教育已刻不容缓,本文通过分析大学生心理问题产生的根源及高校采取的一般对策,指出高校图书馆应利用其特有的人文优势成为大学生心理健康教育基地之一,并给出了具体的建议。     

Overcoming bias toward same-sex couples: a case study from inside an MFT ethics classroom

This article illustrates a teaching case in which a marriage and family therapy (MFT) trainee learned to develop cultural sensitivity toward same-sex couples despite religious beliefs that put her at risk of discriminating against that population. The case took place during a marriage and family therapy ethics course in the spring of 2003. From two first-person perspectives, the authors illustrate the processes that facilitated the student's change, addressing the class activities, discussions, and pivotal moments of teaching and learning that promoted the student's cultural competency and helped her to resolve this personal and ethical dilemma. A set of classroom techniques (creating a safe environment, using a stance of curiosity, finding alternative learning formats, extrapolating ideas from multiple sources, and capitalizing on students' experiences outside of class) used in the case are detailed throughout the article.     

“Economic Theory’s Stance On No-Fault Divorce”

This article explores key insights that economic theory can shed on the issue of no-fault divorce in the United States, addressing modifications in the incentive structure of individuals that resulted from the legislative reforms of the 1970s. After stressing the importance of correctly interpreting and classifying divorce laws, this work investigates the contributions of the theory of property rights, the contributions of game theory and intra-household bargaining, and the contributions of general equilibrium analysis in our understanding of how divorce laws work and what their impact is. By doing so, this exposé analyzes the theoretical consequences of no-fault divorce on the decision whether to get married or divorced, on the characteristics of spouses and divorcees, on divorce rates, and on marital-specific and non marital-specific investments.     

Why females live longer than males: control of longevity by sex hormones

Females live longer than males in many species, including humans. We have traced a possible explanation for this phenomenon to the beneficial action of estrogens, which bind to estrogen receptors and increase the expression of longevity-associated genes, including those encoding the antioxidant enzymes superoxide dismutase and glutathione peroxidase. As a result, mitochondria from females produce fewer reactive oxygen species than those from males. Administering estrogens has serious drawbacks, however--they are feminizing (and thus cannot be administered to males) and may increase the incidence of serious diseases such as uterine cancer in postmenopausal women. Phytoestrogens, which are present in soy or wine, may have some of the favorable effects of estrogens without their undesirable effects. Study of gender differences in longevity may help us to understand the basic processes of aging and to devise practical strategies to increase the longevity of both females and males.     

Broadcast Routing with Minimum Wavelength Conversion in WDM Optical Networks

We consider dynamic routing of broadcast connections in WDM optical networks. Given the current network state, we want to find a minimum set of network nodes S such that a broadcast routing using only the nodes in S as wavelength conversion nodes can be found. This ensures that the average conversion delay from the source to all destinations is minimized. We refer to the problem as Broadcast Conversion Node Selection (BCNS) problem. We prove that BCNS has no polynomial-time approximation with performance ratio ln n for < 1 unless NPDTIME(n^{O(log log n)}) where n is the number of vertices in the input graph. We present a greedy approximation algorithm for BCNS that achieves approximation ratio 2+ln n. Simulation results show that the algorithm performs very well in practice, obtaining optimal solutions in most of the cases.     

中外合资企业跨文化管理的"钻石结构"模型研究--大亚湾核电跨文化管理的探索

本文在继承传统跨文化管理--从国家文化角度分析管理问题的基础上,重点从微观层面出发建立了一个跨文化管理的"钻石结构"模型,并运用这个结构模型来具体分析了大亚湾核电跨文化管理的实践活动,并对大亚湾核电跨文化管理的主要措施进行了探讨,希望这些结论能够对未来中外合资合作企业进行跨文化管理提供有益的参考和借鉴作用.     

What is Loss Aversion?

A behavioral definition of loss aversion is proposed and its implications for original and cumulative prospect theory are analyzed. Original prospect theory is in agreement with the new loss aversion condition, and there utility is capturing all effects of loss aversion. In cumulative prospect theory loss aversion is captured by both the weighting functions and the utility function. Further, some restrictions apply for the weighting functions involved in the latter model.We are indebted to Michèle Cohen and Peter Wakker for helpful comments. The suggestions of an anonymous referee have improved the presentation of the paper.     

On the Bayesian analysis of categorical data: the problem of nonresponse

It is demonstrated how a suitably chosen prior for the frequency parameters can streamline the Bayesian analysis of categorical data with missing entries due to nonresponse or other causes. The two cases where the data follow the Multinomial or the Hypergeometric model are treated separately. In the first case it is adequate to restrict the prior (for the cell probabilities) to the class of Dirichlet distributions. In the case of the Hypergeometric model it is convenient to select a prior from the class of Dirichlet-Multinomial (DM) distributions. The DM distributions are studied in some details.