In this paper, on the basis of a doubly censored sample and in a Bayesian framework, the problem of estimating the mean lifetime, hazard rate, and survival function of the exponential lifetime model is addressed. Bayes estimators under squared-error loss functions are obtained in closed forms. Highest posterior density (HPD) estimators and credible intervals are computed using iterative methods...

OBJECTIVE To assess the health and economic outcomes of various screening and vaccination strategies for cervical cancer prevention. DESIGN Cost-effectiveness analysis from a societal perspective. SETTING Thailand. POPULATION Females aged 9 years and older. METHODS Using a mathematical model of human papillomavirus (HPV) infection and cervical cancer, calibrated to epidemiological data ...

Abstract: Two economic testing policies for industrial products are considered in discrete time. Based on the usual total time on test (TTT) method, we develop non-parametric statistical estimation algorithms to determine the optimal testing times, minimizing the expected cost function per unit time and maximizing the expected profit function per unit time, given that the complete sample data o...

CONTEXT Given the high rates of infection among urban young adults, STD and HIV testing promotion is a public health priority. To inform future testing efforts, lifetime and recent testing behaviors of this population within casual and serious relationships should be better understood. METHODS Data from a 2007-2008 study conducted in select neighborhoods in Hartford and Philadelphia were used...

OBJECTIVES To describe levels of risky sexual behaviour, HIV testing and HIV knowledge among men and women in Guatemala by ethnic group and to identify adjusted associations between ethnicity and these outcomes. DESIGN Data on 16,205 women aged 15-49 and 6822 men aged 15-59 from the 2008-2009 Encuesta Nacional de Salud Materno Infantil were used to describe ethnic group differences in sexual ...

Limited energy is the major driving factor for research on wireless sensor networks. Clustering alleviates this energy shortage problem by reducing data traffic conveyed over the network and therefore several clustering methods are proposed in the literature. Researchers put forward their methods by making serious assumptions such as always locating single sink at one side of the topology or ma...

As CMOS technology scaling continues to low nanometers, aging and device wear-out related degradation is a looming concern. With device wear-out mechanisms such as NBTI and PBTI, catalyzed by higher temperature, transistor performance worsens with time. Similarly with electromigration, interconnects become increasingly resistive until they become non-functional. Such phenomena initially manifes...