A non-adaptive search algorithm that identifies up to three defects

We give a simple and constructable non-adaptive search algorithm that identifies a defective subset of cardinality at most three in a sample of cardinality n when the testing procedure can detect the presence of an odd number of defects in any subset of the sample. Our algorithm uses at most

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many tests.     

Does Class Consciousness Exist in Rural Communities? The Impact of Restructuring and Plant Shutdowns in Rural Canada1

Abstract This paper examines qualitative data on class consciousness derived from a study of corporate restructuring and the impacts of layoffs in rural Ontario communities. In particular, the study examines how the rural environment might impinge on the development of class consciousness among the workers there in the context of severe economic stress brought on by plant shutdowns. It is argued that an ideology specific to a farm and small town environment plays a significant role in shaping their response to crisis. The more standard predictors of class consciousness such as age, gender, past union membership, and employment status are also considered. The paper aims to deepen our understanding of the seemingly contradictory belief structures of working class people.     

Designing for a Response Transformation Parameter

We investigate D -optimum designs for experiments in which a linear model holds after an unknown power transformation of the univariate response variable. This is a departure from standard D -optimal design in which an appropriate scale for the response is assumed known before data collection. The design problem that we formulate is intrinsically non-linear, requiring characterization of likely parameter values. Several applications are presented to illustrate the importance of recognizing the role of response transformations at the design stage.     

A SEMIPARAMETRIC MIXTURE MODEL FOR THE ANALYSIS OF COMPETING RISKS DATA

This paper deals with the regression analysis of failure time data when there are censoring and multiple types of failures. We propose a semiparametric generalization of a parametric mixture model of Larson & Dinse (1985), for which the marginal probabilities of the various failure types are logistic functions of the covariates. Given the type of failure, the conditional distribution of the time to failure follows a proportional hazards model. A marginal like lihood approach to estimating regression parameters is suggested, whereby the baseline hazard functions are eliminated as nuisance parameters. The Monte Carlo method is used to approximate the marginal likelihood; the resulting function is maximized easily using existing software. Some guidelines for choosing the number of Monte Carlo replications are given. Fixing the regression parameters at their estimated values, the full likelihood is maximized via an EM algorithm to estimate the baseline survivor functions. The methods suggested are illustrated using the Stanford heart transplant data.     

EIS—A guide for executives

Although the use of executive information systems (EIS) is increasing, many senior executives have such mixed feelings about them that there is an ‘EIS paradox’. Information managers and software suppliers believe this is because senior executives are intimidated by information technology, but this does not hold up to scrunity. The EIS paradox occurs because of failure to explain coherently how EIS fit with other aspects of the organizational database and what EIS can and cannot do for a senior executive and his or her organization. This article is designed to close the ‘information gap’ about EIS specifically for senior executives. The change in terminology from ‘data processing’ to ‘information technology’ is symptomatic of a change in the way in which computers are used. Rather than being the mere province of the data professional, information technology as exemplified by EIS can be applied to tasks where judgement and selectivity are required. The crucial point about EIS is, however, that computing can complement and increase managerial qualities of imagination and intelligence but not replace them.     

Educational Attainment and Stability in Long-Term Foster Care

SUMMARY. This paper explores the relationship between the reading attainment of a group of 8–14 year olds in long-term foster care and factors in their histories and current home environments. The findings suggest that children's early histories before entry to care may have an effect on their educational attainment in middle childhood. Some amelioration of early childhood experience may be found in a stable foster home placement which has an expectation of permanence. The type of permanent placement seems less important than the expectation of stability. There was no difference in progress between children where the eventual outcome might be adoption or custodianship and those who would remain foster children. Of especial interest was the fact that the foster children's educational attainment was not related either positively or negatively to contact with their birth parents.     

The power of dirt: an exploration of secular defilement in Anglo-Canadian culture

Dans cette communication nous établirons que les seuils culturellement établis distinguant le pur de l'impur constituent une dimension centrale de la construction d'identités et leur maintien. De plus, dans des cultures caractérisées par des formes structurées d'inégalité, ceux qui occupent des positions avantageuses sont positionnés de manière à réaffirmer leur situation au moyen de la gestion de violations d'identité, c'est-à-dire de souillure. Afin de développer cette thèse nous examinerons attentivement la dynamique des relations culturelles impliquées par les relations entre les sexes et l'inégalité des sexes. En particulier nous présenterons des données qui nous permettront de définir des seuils de répugnance par sexe.
In this essay we contend that the culturally defined boundaries distinguishing the pure from the impure constitute a central dimension of identity construction and maintenance. Moreover, in cultures characterized by forms of structured social inequality, those occupying positions of advantage and domination are positioned to reaffirm their situation through the management of identity violation, i.e. defilement. To develop this thesis we focus on the cultural identity dynamics of gender relations and gender inequality. In particular, we present data which permit us to define thresholds of repugnance and finicality by gender.     

Effects of DISCOVER on the Career Maturity of Middle School Students

This study evaluated the effects of DISCOVER (American College Testing [ACT], 1991), a computer-assisted career guidance system, on the career maturity of 38 students (22 girls and 16 boys) enrolled in a rural middle school. Students randomly assigned to the treatment group worked with DISCOVER for approximately 1 hour a day over a 2-week period, whereas students in the control group did not have access to the DISCOVER program. Results indicated significant gains in career maturity among students in the treatment group (p <.05).