A two phases queueing system with Bernoulli vacation schedule under multiple vacation policy

This paper deals with a single server Poisson arrival queue with two phases of heterogeneous service along with a Bernoulli schedule vacation model, where after two successive phases service the server either goes for a vacation with probability p (0≤p≤1) or may continue to serve the next unit, if any, with probability q(=1−p). Further the concept of multiple vacation policy is also introduced here. We obtained the queue size distributions at a departure epoch and at a random epoch, Laplace Stieltjes Transform of the waiting time distribution and busy period distribution along with some mean performance measures. Finally we discuss some statistical inference related issues.     

A note on the queue with a random set-up time under a restricted admissibility policy with a Bernoulli vacation schedule

This paper deals with the queue size distribution of an M^x/G/1 queue with a random set-up time and with a Bernoulli vacation schedule under a restricted admissibility policy. This generalizes the model studied by Madan and Choudhury [Sankhyá 66 (2004) 175–193].     

农村基本公共品的社区供给:山东省30个村庄的调查

一、概念界定与研究方法 1、概念界定 "农村基本公共品"作为本文的主要概念对象,其内涵限定于国际通行的发展中国家"基本社会服务"范畴,即指基础公共生活设施(生活用水、供电、村庄道路)、初级教育、初级医疗、养老服务和社会救助等最基本的生活资源."所有这些服务对于保证基本的生活质量、维持人们的劳动力和健康都是最必需的"①;联合国发展组织通常也根据类似的定义界定基本社会服务或产品的内涵②.这些基本的生活性公共品或服务以社区居民为直接受益者、在某种程度具有萨缪尔森(Samuelson)所定义的消费的非竞争性、受益的非排他性③以及效用的不可分性特征.由此,本文所研究的基本公共品属于基础性社会服务和生活资料,与那些生产性公共品和其他社会性公共品(如治安、精神文明教育等)有所区别.     

Health Care and Female Survivors of Childhood Sexual Abuse: Health Professionals' Perspectives

The present study explored health professionals' experiences with adult survivors of child sexual abuse in New Zealand. Face-to-face, semistructured interviews of up to an hour took place with 13 health professionals. The participants were asked about training, screening practices, their response to disclosures, and advice to other health professionals. A model—transition to ethical practice—emerged from the data, where delivering more sensitive health care to child sexual abuse survivors sits on a continuum from lack of awareness of child sexual abuse to delivery of care where all patients are comfortable. We recommend making sensitive care for all as the standard care of practice and providing training for health professionals on how to deal with disclosures.     

Health Professionals' Responses to Disclosure of Child Sexual Abuse History: Female Child Sexual Abuse Survivors' Experiences

This study reports on a postal questionnaire, conducted in 2004, with female survivors of historic child sexual abuse. The questionnaire explored their experiences of health professionals' responsiveness to disclosure of child sexual abuse history. Of 61 participants, aged between 22 and 65, 69% had disclosed to health professionals. Those who had not disclosed reported that they would have liked to but were not asked about child sexual abuse. Thirty-five percent of participants suggested routine questioning about child sexual abuse. Most participants related a fear of common medical examination procedures to their experience of child sexual abuse, and 64% said this stopped them from attending regular health checks. The current study suggests the development of guidelines for dealing with possible child sexual abuse survivors would be useful for health professionals.     

Intimate partner violence during pregnancy and use of antenatal care among rural women in southern Terai of Nepal

Background

Underutilisation of antenatal care services due to intimate partner violence during pregnancy has been well documented elsewhere, but it is understudied in Nepal. Our study aimed at exploring the impact of intimate partner violence on antenatal care service utilisation in southern Terai of Nepal.

Iso‐chi‐squared testing of 2 × k: ordered tables

The Pearson chi‐squared statistic for testing the equality of two multinomial populations when the categories are nominal is much less appropriate for ordinal categories. Test statistics typically used in this context are based on scorings of the ordinal levels, but the results of these tests are highly dependent on the choice of scores. The authors propose a test which naturally modifies the Pearson chi‐squared statistic to incorporate the ordinal information. The proposed test statistic does not depend on the scores and under the null hypothesis of equality of populations, it is asymptotically equivalent to the likelihood ratio test against the alternative of two‐sided likelihood ratio ordering.     

Analysis of an unreliable MX/G1G2/1/repeated service queue with delayed repair under randomized vacation policy

Abstract

In this article we consider an unreliable M^X/G/1 queue with two types of general heterogeneous service and optional repeated service subject to server’s break down and delayed repair under randomized vacation policy. We assume that customer arrive to the system according to a compound Poisson process. The server provides two types of general heterogeneous service and a customer can choose either type of service before its service start. After the completion of either type of service, the customer has the further option to repeat the same type of service once again. While the server is working with any types of service or repeated service, it may breakdown at any instant. Further the concept of randomized vacation is also introduced. For this model, we first derive the joint distribution of state of the server and queue size by considering both elapsed and remaining time, which is one of the objective of this article. Next, we derive Laplace Stieltjes transform of busy period distribution. Finally, we obtain some important performance measure and reliability indices of this model.     

Empirical Likelihood‐Based Inference in Conditional Moment Restriction Models

This paper proposes an asymptotically efficient method for estimating models with conditional moment restrictions. Our estimator generalizes the maximum empirical likelihood estimator (MELE) of Qin and Lawless (1994). Using a kernel smoothing method, we efficiently incorporate the information implied by the conditional moment restrictions into our empirical likelihood‐based procedure. This yields a one‐step estimator which avoids estimating optimal instruments. Our likelihood ratio‐type statistic for parametric restrictions does not require the estimation of variance, and achieves asymptotic pivotalness implicitly. The estimation and testing procedures we propose are normalization invariant. Simulation results suggest that our new estimator works remarkably well in finite samples.