Analysis of binary data for the balanced one-way classification

A test is proposed for testing the equality of proportions based on the data available from a one-way classification having t treatment conditions and n binary observations per treatment. The test statistic B is a constant multiple of the F-statistic which results when the analysis of variance procedure for the one-way classification is applied to the data and, hence, is computationally simple. The statistic B from this binary analysis of variance (BIANOVA) is distributed asymptotically as a chi-square random variable. The proposed test is uniformly more powerful than either the F-test indicated above or the Pearson chi-square test; however, the attained empirical level of significance is frequently higher than for either of these competitors and usually higher than the stated level of significance for smaller values of n (say n ≤ 20).     

A combined optimization and agent-based approach to supply chain modelling and performance assessment

The main objective of this paper is to give an example of how expert systems techniques for distributed decision-making can be combined with contemporary numerical optimization techniques for the purposes of supply chain optimization and to describe the resulting software implementation. In this paper, multi-agent modelling techniques are applied to simulate and control a simple demand-driven supply chain network system, with the manufacturing component being optimized through mathematical programming. The system measures supply chain performance and the effect of different parameters in the replenishment control system, and can be used to simulate the behaviour of a system that uses optimization for part of its decision-making. The objective of this supply chain network system is to reduce operating cost, while maintaining a high level of customer order fulfilment.     

No Place is Safe: Sexual Abuse of Children in Rural Bangladesh

During July 2007 to June 2010, BRAC, a nongovernment organization in Bangladesh, reported 713 incidents of rape and attempted rape of children (< 18 years) in rural Bangladesh. This study explores these 713 incidents to identify possible patterns related to the victims, perpetrators, and different dynamics of the incidents. Rape and attempted rape, particularly of young girls, constituted 64% of all reported incidents of violence against children. Children were found to be abused by men from all walks of life, mainly by non-family-members (83%). Similar diversity was seen in the location, time, and context of the incidents. The present study attempts to put forward an overall picture of the depth of the problem of child sexual abuse in rural Bangladesh, linking the incidents with the socially constructed gender relations of power and how it perpetuates sexual abuse of children, especially girls.     

Estimation of Weibull distribution parameters for irregular interval group failure data with unknown failure times

SUMMARY This paper presents three methods for estimating Weibull distribution parameters for the case of irregular interval group failure data with unknown failure times. The methods are based on the concepts of the piecewise linear distribution function (PLDF), an average interval failure rate (AIFR) and sequential updating of the distribution function (SUDF), and use an analytical approach similar to that of Ackoff and Sasieni for regular interval group data. Results from a large number of simulated case problems generated with specified values of Weibull distribution parameters have been presented, which clearly indicate that the SUDF method produces near-perfect parameter estimates for all types of failure pattern. The performances of the PLDF and AIFR methods have been evaluated by goodness-of-fit testing and statistical confidence limits on the shape parameter. It has been found that, while the PLDF method produces acceptable parameter estimates, the AIFR method may fail for low and high shape parameter values that represent the cases of random and wear-out types of failure. A real-life application of the proposed methods is also presented, by analyzing failures of hydrogen make-up compressor valves in a petroleum refinery.     

Muslims in a 'White Australia': Colour or Religion?

Muslim migration to Australia took place over three distinct periods - the Colonial, the 'White Australia' and the Multicultural periods. This article discusses the settlement issues of Muslims during the 'White Australia' period (1901-73). It particularly focuses on five distinct ethnic groups - Indians, Afghans, Malays, Javanese and Albanians - in Queensland and Western Australia. It questions whether these groups were treated 'differently'because of their Islamic beliefs. The study draws upon both primary and secondary sources, including archival materials and oral testimonies. From the evidence presented, it is clear that a hardening attitude against Muslims has been apparent and that historical antipathies and long-lived antipathies have grown in the specific context of the current geopolitical climate     

Application of minque procedure to block designs

Method of minimum norm quadratic unbiased estimation (MINQUE) is applied to incomplete block designs. Simple formulae are derived for a class of designs which includes the balanced designs.     

Negotiating reform: young people's leadership in the educational arena

Youth organizing within the institutional context of community-based organizations has grown exponentially. Drawing on interviews with more than eighty organizers, youth, and educators, this article examines young people's experiences as they organize to expand educational opportunities for themselves and their peers in urban school districts. The authors explore educator responses to youth organizing and analyze how race- and class-based assumptions about youth leadership, as well as differing cultural norms between schools and youth organizing groups, pose challenges for young people fighting for education reform. The authors describe three strategies youth organizing groups use to address these challenges: intensive leadership development, targeted relationship building with district administrators, and alliance building. Implications for both educators and youth organizing groups are discussed.