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11.
A system of predictors for estimating a finite population variance is defined and shown to be asymptotically design-unbiased (ADU) and asymptotically design-consistent (ADC) under probability sampling. An asymptotic mean squared error (MSE) of a generalized regression-type predictor, generated from the system, is obtained. The suggested predictor attains the minimum expected variance of any design-unbiased estimator when the superpopulation model is correct. The generalized regression-type predictor and the predictor suggested by Mukhopadhyay (1990) are compared. 相似文献
12.
This paper considers an inventory system with non-instantaneous deteriorating item in which demand rate is a function of advertisement of an item and selling price. This paper aids the retailer in maximizing the total profit by determining optimal inventory and marketing parameters. In contrast to previous inventory models, an arbitrary holding cost rate and arbitrary deterioration rate have been incorporated to provide general framework to the model. First, a mathematical model is formulated and then some useful theoretical results have been framed to characterize the optimal solutions. The necessary and sufficient conditions for the existence and uniqueness of the optimal solutions are also derived. An algorithm is designed to find the optimum solutions of the proposed model. Numerical examples are included to illustrate the algorithmic procedure and the effects of key parameters are studied to analyze the behavior of the model. 相似文献
13.
Mortality among neonates has long been largely neglected by research in all developing nations of world including India. This
study aims to identify the primary and secondary causes of neonatal deaths among the tribes of Gujarat by retrospectively
analyzing 106 neonatal deaths that occurred during the year 2008 and 2009. The socio-economic, biological and traditional
newborn care practices impacting newborn survival were also studied. Case studies including in-depth interviews of 33 women
who had experienced neonatal deaths in period of 2008 and 2009 have also been conducted. The results show that the main causes
of neonatal deaths in the study area were birth asphyxia, prematurity, aspiration, infection and congenital anomalies, irrespective
of place of delivery. Absence of trained and skilled personnel for newborn resuscitation was the main cause of perinatal birth
asphyxia related deaths. Around 36% mothers had a history of infant deaths. Low birth weight is one of the important causes
of neonatal deaths among mothers who had a history of child loss. Cyclicality of neonatal deaths continued among clustered
families with social factors initiating the cycle. Qualified trained birth attendants practicing essential newborn care are
necessary during home deliveries. 相似文献
14.
In this paper, we revisit the problem of combining estimates of location considered by Cohen (1976). Our results unify and strengthen the results of Cohen (1976), Bhattacharya (1981) and Akai (1982). 相似文献
15.
Syed Raza Shah Gilani Frank J. Cavico Bahaudin G. Mujtaba 《Public Organization Review》2014,14(1):1-18
Harassment is a major deterrent for productivity, loyalty, and commitment to one’s job and organization. Unfortunately, many employees tend to experience various forms of harassment in the workplace. The focus in this article is to understand the extent to which the law protects a person from harassment, first based on the explication and application laws in the United Kingdom. The article then provides comparative discussion of laws and practices against workplace harassment in the United States. A major objective of this article is to help employers and managers become more expert in preventing and correcting harassment. 相似文献
16.
Shah E Habib 《The Australian journal of social issues》2003,38(1):1-17
‘Risk’ is central to recent sociological studies of health and related behaviour, particularly in discourses about HIV/AIDS and hepatitis C (HCV). While epidemiological survey predominates over qualitative investigation in HCV risk reduction, it is necessary to move beyond individual‐level characteristics to gain a fuller understanding of the social context of risk. This paper investigates the context of HCV‐related risk behaviour among injecting drug users (IDUs) and discusses the behavioural and social determinants of risk practices. Data from 336 IDUs completing a self‐administered questionnaire were analysed. The data show that needle‐sharing practices are often integral to long‐standing relationships, particularly sexual ones. The level of drug dependency, trust relationships between partners and misconceptions about HCV transmission have been demonstrated to be associated with risk behaviour. Logistic factors, such as poor access to injecting equipment, limited hours of operation, and fear of police were given as barriers to safer injecting. Given the progression of the HCV epidemic, prevention campaigns should aim at risk reduction rather than risk elimination. 相似文献
17.
It is shown that the minimal covering designs for v=6t+5 treatments in blocks of size 3 are optimal w.r.t. a large class of optimality criteria. This class of optimality criteria includes the well-known criteria of A-, D- and E-optimality. It is conjectured that these designs are also optimal w.r.t. other criteria suggested by Takeuchi (1961). 相似文献
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20.
Arvind K. Shah 《The American statistician》2013,67(1)
A simple approximation for areas under the standard normal curve is presented that is suitable for use when tables and/or calculators are not available or not permitted. 相似文献