Proportional Hazards in Information Security

Nonparametric methods can be used to analyze failure times and estimate probability distributions for failures of systems due to successful attacks on confidentiality, integrity, and availability in information security. However, such methods do not take full advantage of supplemental information regarding the configurations of systems in an information infrastructure that is usually also available. One approach, which does take advantage of such information, views the risks of systems failing from various causes as competing risks and determines the correlation coefficients of different treatments to system longevity. Since the times and causes of failure in such studies are usually uncorrelated, the hazards associated with each risk are proportional. By correlating system survival times to the use of specific design enhancements and security countermeasures, as well as to system exposure based on choice of operational functionality, guidance can be obtained for making investments in information security.     

A view from above: The evolving sociological landscape

How has sociology evolved over the last 40 years? In this paper, we examine networks built on thousands of sociology-relevant papers to map sociology’s position in the wider social sciences and identify changes in the most prominent research fronts in the discipline. We find first that sociology seems to have traded centrality in the field of social sciences for internal cohesion: sociology is central, but not nearly as well bounded as neighboring disciplines such as economics or law. Internally, sociology appears to have moved away from research topics associated with fundamental social processes and toward social-problems research. We end by discussing strategies for extending this work to wider science production networks.     

Risk and Ideology in Sexual Harassment

One explanation of sexual harassment is that it is the result of differences in organizational or individual authority between harasser and victim. A competing conceptualization suggests that much of what is termed sexual harassment is the result of a particular definition of the situation by women possessing nontraditional or feminist gender-role ideologies. Using a sample of university faculty, students and staff, this study examines the relationship among organizational position, demographic risk factors, and gender-role ideology on the self-reported incidence of sexual harassment. The findings show little relation exists between the various risk factors and the report of harassment in this sample.     

Autocorrelation in real-time continuous monitoring of microenvironments

Interpretation of continuous measurements in microenvironmental studies and exposure assessments can be complicated by autocorrelation, the implications of which are often not fully addressed. We discuss some statistical issues that arose in the analysis of microenvironmental particulate matter concentration data collected in 1998 by the Harvard School of Public Health. We present a simulation study that suggests that Generalized Estimating Equations, a technique often used to adjust for autocorrelation, may produce inflated Type I errors when applied to microenvironmental studies of small or moderate sample size, and that Linear Mixed Effects models may be more appropriate in small-sample settings. Environmental scientists often appeal to longer averaging times to reduce autocorrelation. We explore the functional relationship between averaging time, autocorrelation, and standard errors of both mean and variance, showing that longer averaging times impair statistical inferences about main effects. We conclude that, given widely available techniques that adjust for autocorrelation, longer averaging times may be inappropriate in microenvironmental studies.     

Modeling Fetal Death and Malformation in Developmental Toxicity Studies

We review approaches to dose-response modeling and risk assessment for binary data from developmental toxicity studies. In particular, we focus on jointly modeling fetal death and malformation and use a continuation ratio formulation of the multinomial distribution to provide a model for risk. Generalized estimating equations are used to account for clustering of animals within litters. The fitted model is then used to calculate doses corresponding to a specified level of excess risk. Two methods of arriving at a lower confidence limit or Benchmark dose are illustrated and compared. We also discuss models based on single binary end points and compare our approach to a binary analysis of whether or not the animal was 'affected' (either dead or malformed). The models are illustrated using data from four developmental toxicity studies in EG, DEHP, TGDM, and DYME conducted through the National Toxicology Program.     

Assessing Sibling Attachment in the Face of Placement Issues

With the advent of the Adoption and Safe Families Act of 1997 child welfare workers are faced with the task of placing sibling groups in potential adoptive homes shortly after their separation from biological families. At times, the number of children and/or their special needs present arguments against the conventional wisdom of maintaining the sibling group intact. This paper presents guidelines in the assessment of sibling attachment and in the decision-making process regarding placement.     

Common pitfalls of beginning therapists utilizing enactments

Empirical data, clinical observation, and theoretical rationales support use of enactments as a fundamental mechanism of change in relationship therapies. Yet beginning therapists may lack an adequate conceptual framework and operational training essential to effectively utilize enactments. Inadequate training may contribute to ineffective execution, and in turn to negative results, which could lead to abandonment of enactments. This study sought to identify proficiencies and nonproficiencies of beginning therapists in conducting enactments. Twenty beginning therapists from three Commission on Accreditation for Marriage and Family Therapy Education (COAMFTE)-accredited programs were briefly trained in an indirect therapy style that incorporates enactments. Twenty-six therapist enactments were coded using a comprehensive observational measure designed to assess proficiencies and nonproficiencies in executing enactment phases, component tasks, and subcomponent operations. Results suggest that beginning therapists struggle with numerous clinical operations conceptually linked to the successful engagement of relationships in marriage and family therapy. In light of these findings, specific recommendations for additional enactment training in COAMFTE-accredited programs are offered.     

CONSUMER BANKRUPTS IN MELBOURNE

This paper reviews the literature on consumer bankruptcy in Australia and reports on data from a survey of a sample of consumer bankrupts in Melbourne who petitioned for their own bankruptcy. Data on their socio-demographic characteristics, perceived causes of their bankruptcy and the nature of the experience are presented. It was found that: bankrupts tended to be social security recipients with few assets; and ‘non-interventionist’ bankruptcy administration resulted in a fairly benign process which improved the bankrupts' personal and financial affairs. The role of inadequate income support and the lending practices of finance companies are discussed.