Short cuts to safety: Risk and 'rules of thumb' in accounts of food choice

A number of 'food scares' over the past decade in Europe have generated considerable debate about public understandings of food risk, and the extent to which such understandings impact on decision making. This paper reports on a focus group study of how UK consumers discuss choosing safe food. Strategies for making food choices were, in general, characterised by confidence rather than anxiety. Although concerned in an abstract way with the safety of food and how it was monitored, 'risk' and 'safety' were rarely the primary discursive framework used for justifying food choices. Other discourses, such as health, naturalness, economy and convenience, competed with, overlapped with or were legitimated by that of 'risk'. However, everyday decision making was presented as a routine endeavour, aided by a number of 'short cuts' or rules of thumb for establishing food choices as routine and unremarkable. These short cuts divided safe from risky categories of food, but also divided preferred from despised foodstuffs in relation to other food discourses. Rules of thumb provided useful rhetorical devices for routinising accounts of food choice. In practice, however, rules of thumb are reported as being utilised in complex and contingent ways. They thus provide a sophisticated bulwark against the uncertainties of food risks when events (such as the media concern over BSE) threaten everyday trust in routine decisions

"The Institut Pascal Data Sets" : un jeu de données en extérieur, multicapteurs et datées avec réalité terrain, données d'étalonnage et outils logiciels

National audienceLa mise à disposition au public de jeux de données permet des progrès conséquents pour la validation des travaux de recherche. Nous présentons dans cet article un jeu de données multi-capteurs acquises sur un campus. L'Institut Pascal DataSets peut être utilisé dans une large variété d'applications robotiques et de traitement d'images. Il inclut entre autres une réalité terrain fournie par un GPS centimétrique et des images panoramiques couleur. Sont également fournies des séquences additionnelles pour des phases d'étalonnage, des données a priori ainsi que des outils logiciels

Evolution of virulence: triggering host inflammation allows invading pathogens to exclude competitors.

Virulence is generally considered to benefit parasites by enhancing resource-transfer from host to pathogen. Here, we offer an alternative framework where virulent immune-provoking behaviours and enhanced immune resistance are joint tactics of invading pathogens to eliminate resident competitors (transferring resources from resident to invading pathogen). The pathogen wins by creating a novel immunological challenge to which it is already adapted. We analyse a general ecological model of 'proactive invasion' where invaders not adapted to a local environment can succeed by changing it to one where they are better adapted than residents. However, the two-trait nature of the 'proactive' strategy (provocation of, and adaptation to environmental change) presents an evolutionary conundrum, as neither trait alone is favoured in a homogenous host population. We show that this conundrum can be resolved by allowing for host heterogeneity. We relate our model to emerging empirical findings on immunological mediation of parasite competition

Semiconductor quantum dots devices: Recent advances and application prospects

In this paper, a brief review will be given on recent advances in semiconductor quantum dots based optoelectronic devices. The focus will be on two major application areas, i.e., telecom devices and high power light sources, where some device examples will be discussed on the current status and for the future prospect

Random mobility and spatial structure often enhance cooperation

The effects of an unconditional move rule in the spatial Prisoner's Dilemma, Snowdrift and Stag Hunt games are studied. Spatial structure by itself is known to modify the outcome of many games when compared with a randomly mixed population, sometimes promoting, sometimes inhibiting cooperation. Here we show that random dilution and mobility may suppress the inhibiting factors of the spatial structure in the Snowdrift game, while enhancing the already larger cooperation found in the Prisoner's dilemma and Stag Hunt games.Comment: Submitted to J. Theor. Bio

Demography and the tragedy of the commons

Individual success in group-structured populations has two components. First, an individual gains by outcompeting its neighbors for local resources. Second, an individual's share of group success must be weighted by the total productivity of the group. The essence of sociality arises from the tension between selfish gains against neighbors and the associated loss that selfishness imposes by degrading the efficiency of the group. Without some force to modulate selfishness, the natural tendencies of self interest typically degrade group performance to the detriment of all. This is the tragedy of the commons. Kin selection provides the most widely discussed way in which the tragedy is overcome in biology. Kin selection arises from behavioral associations within groups caused either by genetical kinship or by other processes that correlate the behaviors of group members. Here, I emphasize demography as a second factor that may also modulate the tragedy of the commons and favor cooperative integration of groups. Each act of selfishness or cooperation in a group often influences group survival and fecundity over many subsequent generations. For example, a cooperative act early in the growth cycle of a colony may enhance the future size and survival of the colony. This time-dependent benefit can greatly increase the degree of cooperation favored by natural selection, providing another way in which to overcome the tragedy of the commons and enhance the integration of group behavior. I conclude that analyses of sociality must account for both the behavioral associations of kin selection theory and the demographic consequences of life history theory

A fuzzy method for propagating functional architecture constraints to physical architecture.

International audienceModular product design has received great attention for about 10 years, but few works have proposed tools to either jointly design the functional and physical architectures or propagate the impact of evolutions from one domain to another. In this paper, we present a new method supporting the product architecture design. In new product development situations or in reengineering projects, system architects could use this method in the early design stages to predetermine cohesive modules and integrative elements and to simulate a domain architecture by propagating architecture choices from another domain. To illustrate our approach, we present an industrial case study concerning the design of a new automobile powertrain

The principles and application of qualitative research

The present paper provides an overview of the methodological principles that underpin qualitative research and how these principles differ from those of quantitative research. It is intended to set the scene for the following papers that outline two specific approaches to the analysis of qualitative data. Within the tradition of qualitative research there are many different theoretical perspectives, of which these approaches are only two examples, but they need to be set within this broader tradition in order to highlight their specific features. Qualitative and quantitative research differ from each other in far more than their methods and data. They are each based on very different premises about both the nature of the world and the nature of our knowledge of it and how this information is generated. These approaches have implications for all aspects of research strategy, including the assessment of the quality of research findings and their wider utility or application. In relation to the latter, lack of detail in the reporting of qualitative research and small sample sizes has tended to create the impression that the findings of qualitative research have little application outside the particular research setting. While there is need for more rigor in reporting, it needs to be recognized that qualitative research can offer insights and understandings with wider relevance, although these outcomes are of a different type from those provided by quantitative research

Simone de Beauvoir

9 p.Simone de Beauvoir fue una escritora, profesora y filósofa francesa, que desarrolló y discutió diferentes temas como lo son la política, la economía, la filosofía y el feminismo. Convirtiéndose en una de las imágenes más importantes del feminismo filosófico y del feminismo de la liberación durante el siglo XX haciendo parte de la segunda ola feminista.EL FEMINISMO SIMONE DE BEAUVOIR – PENSAMIENTO FEMINISTA BIBLIOGRAFÍ