Quantitative Risk Assessment of Listeria monocytogenes in French Cold-Smoked Salmon: II. Risk Characterization

A model for the assessment of exposure to Listeria monocytogenes from cold-smoked salmon consumption in France was presented in the first of this pair of articles (Pouillot et al ., 2007, Risk Analysis, 27:683–700). In the present study, the exposure model output was combined with an internationally accepted hazard characterization model, adapted to the French situation, to assess the risk of invasive listeriosis from cold-smoked salmon consumption in France in a second-order Monte Carlo simulation framework. The annual number of cases of invasive listeriosis due to cold-smoked salmon consumption in France is estimated to be 307, with a very large credible interval ([10; 12,453]), reflecting data uncertainty. This uncertainty is mainly associated with the dose-response model. Despite the significant uncertainty associated with the predictions, this model provides a scientific base for risk managers and food business operators to manage the risk linked to cold-smoked salmon contaminated with L. monocytogenes. Under the modeling assumptions, risk would be efficiently reduced through a decrease in the prevalence of L. monocytogenes or better control of the last steps of the cold chain (shorter and/or colder storage during the consumer step), whereas reduction of the initial contamination levels of the contaminated products and improvement in the first steps of the cold chain do not seem to be promising strategies. An attempt to apply the recent risk-based concept of FSO (food safety objective) on this example underlines the ambiguity in practical implementation of the risk management metrics and the need for further elaboration on these concepts.     

Quantitative Risk Assessment of Listeria monocytogenes in French Cold-Smoked Salmon: I. Quantitative Exposure Assessment

A quantitative assessment of the exposure to Listeria monocytogenes from cold-smoked salmon (CSS) consumption in France is developed. The general framework is a second-order (or two-dimensional) Monte Carlo simulation, which characterizes the uncertainty and variability of the exposure estimate. The model takes into account the competitive bacterial growth between L. monocytogenes and the background competitive flora from the end of the production line to the consumer phase. An original algorithm is proposed to integrate this growth in conditions of varying temperature. As part of a more general project led by the French Food Safety Agency (Afssa), specific data were acquired and modeled for this quantitative exposure assessment model, particularly time-temperature profiles, prevalence data, and contamination-level data. The sensitivity analysis points out the main influence of the mean temperature in household refrigerators and the prevalence of contaminated CSS on the exposure level. The outputs of this model can be used as inputs for further risk assessment.     

Development of Professional Concepts Through Work Analysis: Tech Diving Under the Loop of Activity Clinic

This article deals with conceptual development in an emerging activity, Technical diving. Tech divers are equipped with innovative, complex machines (the “rebreathers”) to perform deep dives. The developmental methodology of cross self-confrontation was used to investigate the psychological dimensions of safety in diving with a group of volunteers (divers and instructors). One sequence of these data helps us analyze carefully the development of one concept in use in this milieu, the “confidence in the machine.” Building on 30 years of French-speaking research in work analysis on conceptualization in the work activity, we highlight the conflicting nature of the professional concepts as well as their multifunctionality. In the sequence analyzed in this article, the conceptual development takes the form of the discursive discovery of this complexity, which may open new possibilities for action (here, through the transmission of renewed concepts to other practitioners). The argumentative logics of the dialogical framework requires from the participants that they go beyond well-established knowledge to be able to convince both the researcher and their colleague. However, the stabilization of the concept emerging in this debate is related to its double anchoring: anchoring both in the emotions of the participants and in the professional genre of the milieu. This article shows the potential of the developmental methodology of cross self-confrontations in conceptual development: combining careful observation of routine behaviors, comparisons of personal habits, and thorough discussion of convergences and discrepancies, the methodology encourages reflexive practice and conceptual renewal.     

Feeding behaviour of red fox and domestic cat populations in suburban areas in the south of Paris

Urban Ecosystems - Among medium-sized carnivores, red foxes (Vulpes vulpes) and domestic cats (Felis silvestris catus) are the most abundant species in human-dominated landscapes worldwide. Both...     

Extreme behaviour for bivariate elliptical distributions

The authors examine the asymptotic behaviour of conditional threshold exceedance probabilities for an elliptically distributed pair (X, Y) of random variables. More precisely, they investigate the limiting behaviour of the conditional distribution of Y given that X becomes extreme. They show that this behaviour differs between regularly and rapidly varying tails.     

Ideology in Management Studies

Ideology is a core and contested concept in the social sciences, but also long deployed in management research to highlight the political, embedded and/or obscuring nature of ideas. Indeed, many would argue that management itself is inherently ideological in legitimating or privileging managerial interests and concealing other groups and ways of organizing. In the first systematic review of how ideology has been conceptualized in management studies, this paper explores its diverse and changing meanings in order to develop and sustain the concept. It is based on a heuristic review of 175 articles and 41 books published between 1956 and 2018. Further developing categories used in the social sciences around its role, we found views of ideology as: (1) domination; (2) legitimation; (3) interpretation; (4) integration; and (5) normative logic. In addition, emerging perspectives were identified where ideology was (6) an object of critique or (7) fantasy structuring social reality. We describe, illustrate and evaluate these often internally diverse and interrelated perspectives, as well as comparing them with sometimes competing notions within the management field, such as discourse, culture and legitimation. We also bring together the different approaches and argue for a pluralist, but not infinitely flexible, approach to the concept. In doing so, we identify research agendas for ideology within management and organization studies.     

Symposium sur Inventing Equal Opportunity de Frank Dobbin

Frank Dobbin's Inventing equal opportunities, published by Princeton University Press in 2009, has arrived at just the right time in a France where the theme of “diversity” has permeated big firms and where equal opportunity policies are being debated in the educational system, which, from kindergarten to university, is being accused of fostering inequality. This book provides a stimulating, innovative contribution to our understanding not only of these questions in the United States but also of the French case. We thought it was time to organize a symposium on a book that recounts and dissects nearly fifty years of development in equal opportunity policies in the United States. To fully describe the wealth of information in this book, we asked authors with different disciplinary perspectives to take part. By analyzing social movements, public actions, the legal system and occupational forms of mobilization, Frank Dobbin has revitalized and challenged accepted ideas about the role of public players in regulating behavior. He has also shown that legal uncertainty in civil rights cases has led to the formation of corporate standards that, though private, have the value of public ones.