Context in the Risk Assessment of Digital Systems

As the use of digital computers for instrumentation and control of safety-critical systems has increased, there has been a growing debate over the issue of whether probabilistic risk assessment techniques can be applied to these systems. This debate has centered on the issue of whether software failures can be modeled probabilistically. This paper describes a context-based approach to software risk assessment that explicitly recognizes the fact that the behavior of software is not probabilistic. The source of the perceived uncertainty in its behavior results from both the input to the software as well as the application and environment in which the software is operating. Failures occur as the result of encountering some context for which the software was not properly designed, as opposed to the software simply failing randomly. The paper elaborates on the concept of error-forcing context as it applies to software. It also illustrates a methodology which utilizes event trees, fault trees, and the Dynamic Flowgraph Methodology (DFM) to identify error-forcing contexts for software in the form of fault tree prime implicants.     

Are Conventional Farmers Conventional? Analysis of the Environmental Orientations of Conventional New Zealand Farmers*

Abstract Within the political economy of agriculture and agrofood literatures there are examples of approaches that reject simple dichotomies between alternatives and the mainstream. In line with such approaches, we challenge the assumption that alternative agriculture, and its attendant improved environmental practices, alternative management styles, less intensive approaches, and better approaches to animal and ecosystem welfare, is the only source of agricultural sustainability. This article uses national farm‐survey results for New Zealand's sheep and beef, dairy, and horticulture sectors to examine conventional farmers, measure their assessments of farming practices, and assess their environmental orientation. Analysis identifies a proenvironmental cluster of farmers in each sector characterized by a higher environmental‐orientation score and distinct ratings of other farm practices queried in the survey. We interpret the results in terms of the exposure of different agricultural sectors to the effects of market‐based, audited, best‐practice schemes. The presence of shades of “greenness” among conventional farmers has important implications for environmental management and for our understanding of the various and complex pathways toward the greening of agrofood systems.     

Marital Status,Gender, and Parents’ Psychological Well‐Being*

This study analyzes the associations between marital status, gender, and depressive symptoms among parents. The regression results indicate that married parents report fewer traditional depressive symptoms and lower rates of alcohol abuse than do single parents. Mothers and fathers also appear to be more likely to exhibit different depressive symptoms: Mothers are more likely than fathers to report traditional depressive symptoms and fathers are more likely to report the abuse of alcohol. Finally, we find evidence that indicators of parenting burdens such as economic strain, household labor, childcare, social support, and religious involvement mediate and moderate these relationships.     

Flexible Threshold Models for Modelling Interest Rate Volatility

This paper focuses on interest rate models with regime switching and extends previous nonlinear threshold models by relaxing the assumption of a fixed number of regimes. Instead we suggest automatic model determination through Bayesian inference via the reversible jump Markov Chain Monte Carlo (MCMC) algorithm. Moreover, we allow the thresholds in the volatility to be driven not only by the interest rate but also by other economic factors. We illustrate our methodology by applying it to interest rates and other economic factors of the American economy.     

Cultures of embodied experience: technology, religion and body pedagogics

Two trends have dominated recent sociological analyses of embodiment. There has, on the one hand, been a proliferation of analyses identifying bodies as the experiential vehicles through which we exist and interact in the world. On the other hand, this has been accompanied by a large growth in studies suggesting that technological advances have both increased our exposure to instrumental rationality and radically weakened the boundaries between humans and machines. Considered together, these trends raise an important question which has, however, been marginalised in the literature: if bodies are increasingly shaped and even constituted by the performative demands and invasive capacities of technology, what implications does this have for our lived experience of ourselves and our social and natural environment? In addressing this issue, our paper revisits Heidegger's discussion of the technological ‘enframing’ of humans and asks two questions. First, what have we lost experientially by being positioned as a ‘standing reserve’ for technologically driven demands for efficiency in contemporary society? Second, can the analysis of religious attempts to reframe human experience provide us with a perspective from outside this technological culture that enables us to appreciate the embodied experiences, dispositions and potentialities of humans in fresh ways? Our approach to these issues proceeds via a comparative study of the ‘body pedagogics’ of modern technological culture and two, very different, religious cultures.     

Current Issues in Alternative Media Research

Research in alternative media has burgeoned since the turn of the millennium. The majority of studies has examined the political and social dimensions of alternative media and has focused on the media of social movements. The value of these amateur media projects lies not only in the content they produce, but also in the educational and political empowerment they offer to their participants. Other forms of alternative media, such as blogs and fanzines, present challenges to mainstream journalism; they challenge the exclusive authority and expertise of professional journalists. Recent research has begun to examine the relationship between alternative and mainstream media practices, particularly examining how alternative media offer ways of rebalancing media power and how 'ordinary' people are able to represent their own lives and experiences and concerns in ways that are often ignored or marginalised by the dominant media institutions. However, we need to learn more about specific alternative media practices and how audiences use their content.     

The Effects of Imputing the Missing Standard Deviations on the Standard Error of Meta Analysis Estimates

A common problem in the meta analysis of continuous data is that some studies do not report sufficient information to calculate the standard deviation (SDs) of the treatment effect. One of the approaches in handling this problem is through imputation. This article examines the empirical implications of imputing the missing SDs on the standard error (SE) of the overall meta analysis estimate. The simulation results show that if the SDs are missing under Missing Completely at Random and Missing at Random mechanism, imputation is recommended. With non random missing, imputation can lead to overestimation of the SE of the estimate.     

Occupying Subjectivity: Being and Becoming Radical in the Twenty-First Century: Introduction

Abstract

Critical theory has long concerned itself with the exploration of radical political subjectivities, of the various ways in which social movements, revolutionary classes and everyday communities reshape themselves and their relations in order to survive, transform or defeat oppressive forces. This special issue brings together a series of articles examining different forms (and spaces) of contemporary radical subjectivities, situating them in a global context. This short editorial introduction highlights the major themes of the special issue (placing particular attention on the relationship between theory and the subject), and outlines the eight pieces that follow.