Estimation and testing of P(Y > X) in two-parameter exponential distributions

In this article, we obtain the UMVUE of the reliability function ξ=P(Y>X) and the UMVUE of ξ ^k =[P(Y>X)] ^k in the two-parameter exponential distributions with known scale parameters. We also derive the distribution of the UMVUE of ξ and further considering the tests of hypotheses regarding the reliability function ξ.     

Bayesian model selection for life time data under type II censoring

This paper considers the Bayesian model selection problem in life-time models using type-II censored data. In particular, the intrinsic Bayes factors are calculated for log-normal, exponential, and Weibull lifetime models using noninformative priors under type-II censoring. Numerical examples are given to illustrate our results.     

Career Maturity and Quality of Life in Korean Adolescents: A Cross‐Lagged Panel Design

This study investigated the effectiveness of a short‐term career exploration program for enhancing career maturity and quality of life in Korean adolescents. It further tested causality between career maturity and quality of life defined as school satisfaction and subjective well‐being. We used a cross‐lagged panel design to examine the links among career maturity, subjective well‐being, and school satisfaction, measured both before and 4 weeks after a career exploration program for 224 Korean middle school students. Study results indicated that 4 weeks after the program implementation, there were significant increases in career maturity, subjective well‐being, and school satisfaction. A significant causal relationship from the pretest score of career maturity to the posttest score of school satisfaction was found. Results suggest that the implementation of a short‐term career exploration program designed to increase career maturity also significantly promotes school satisfaction. Limitations of the study are discussed along with suggestions for future research.     

Differences in sexual guilt and desire in East asian and euro-canadian men

Differences in sexual desire between individuals of East Asian and European descent are well-documented, with East Asian individuals reporting lower sexual desire. The mechanisms that underlie this disparity have received little empirical attention. Recent research has found that sex guilt, "a generalized expectancy for self-mediated punishment for violating or for anticipating violating standards of proper sexual conduct" (Mosher & Cross, 1971 , p. 27), mediates the relationship between culture and sexual desire in East Asian and Euro-Canadian women. The goal of this study was to explore this role of sex guilt in men. Male Euro-Canadian (n?=?38) and East Asian (n?=?45) university students completed online questionnaires. The East Asian men reported significantly lower sexual desire and significantly higher sex guilt. Sex guilt was a significant mediator of the relationship between ethnicity and sexual desire, as well as a significant mediator between mainstream acculturation and sexual desire. Among the East Asian men, mainstream acculturation was significantly and negatively correlated with sex guilt such that increasing mainstream acculturation was associated with less sex guilt. The diagnostic and clinical implications of the findings are discussed.     

试论汉魏佛教对王弼玄学思想的影响——以几种思维方式和时代状况的分析为中心

一般认为,玄学思想对佛教产生了影响,但玄学并未受到佛教的影响。但是,从思想家王弼的观念论、一回性和志向究竟的思维类似于当时流行的佛教这一事实来看,无法排除汉魏佛教对王弼玄觉察思想产生影响的可能性。     

Group and within-group variable selection for competing risks data

Variable selection in the presence of grouped variables is troublesome for competing risks data: while some recent methods deal with group selection only, simultaneous selection of both groups and within-group variables remains largely unexplored. In this context, we propose an adaptive group bridge method, enabling simultaneous selection both within and between groups, for competing risks data. The adaptive group bridge is applicable to independent and clustered data. It also allows the number of variables to diverge as the sample size increases. We show that our new method possesses excellent asymptotic properties, including variable selection consistency at group and within-group levels. We also show superior performance in simulated and real data sets over several competing approaches, including group bridge, adaptive group lasso, and AIC / BIC-based methods.     

Age Differences in Stressors,Coping Resources,and General Well-Being Among Korean Immigrants

ABSTRACT

 This study explored 346 Korean immigrants living in California to examine: a) differences in stressors, coping resources, and general well-being (anxiety, depression, positive well-being, self-control, vitality, and general health) between younger (18–64 years old) and older (65–96 years old) Korean immigrants; and b) differences in associations of stressors and coping resources with general well-being in the 2 groups. Results revealed that the older immigrants experienced higher levels of socioeconomic stressors and psychological/physical problems. In addition, English-language problems, low education, and financial difficulties were more consistently associated with lower levels of general well-being in the older immigrants than in the younger immigrants. Social support, religious practice, and spiritual coping were more likely to alleviate the detrimental consequences of stressors on general well-being in the older immigrants than in the younger immigrants. To improve the general well-being of older Korean immigrants, the results suggest: a) emphasis of social and health care services with bilingual capability; b) improved social support systems; and c) utilization of spiritual assessments and interventions. Future research should extend the current study with longitudinal data of a more generalizable sample of Korean immigrants.     

Intrinsic Priors for Testing Two Normal Means with Intrinsic Bayes Factors

ABSTRACT

In this article we consider the problem of comparing two normal means with unknown common variance using a Bayesian approach. Conventional Bayes factors with improper non informative priors are not well defined. The intrinsic Bayes factors are used to overcome such a difficulty. We derive intrinsic priors whose Bayes factors are asymptotically equivalent to the corresponding intrinsic Bayes factors. We illustrate our results with numerical examples.