Fatigue management by truck drivers in real life situations: some suggestions to improve training

Truck driver fatigue is a major safety issue for truck drivers and the public in general. Although training prepares drivers to effectively operate a truck, it tends to minimize the importance of working constraints faced daily on-the-job and thus reduces its impact on safety and effectiveness. With experience, drivers develop skills to combat fatigue. Documenting these skills can contribute to improved training of apprentices. An ethnographic approach was used to better understand the real-life fatigue management skills of truck drivers. Participant observation was used to analyze the activity of apprentices in training and the activity of truck drivers at work. Observations indicated that training focused on time management and regulations, but did not prepare trainees to manage real-life constraints. Experienced drivers were not merely managing time; rather they were managing working constraints (including time) as a whole. To do so, they used two strategies: managing psycho-physical transformations and dynamic work planning. By integrating psycho-physical preoccupations into all aspects of work and by preparing future drivers to face real-life constraints, we could better train and prepare apprentices. Drivers do develop effective skills to combat fatigue which can improve training and better prepare future drivers to face daily constraints. These improvements can have a significant impact on fatigue and safety in the transportation industry.     

Avian Influenza in Vietnam: Chicken‐Hearted Consumers?

This study, based on quantitative and qualitative surveys conducted from July 2004 to September 2005, examines the perceptions of Hanoi consumers and their reactions to the Avian Influenza epizootic (H5N1). Hanoi consumers clearly link the risk of human contamination by the virus to the preparation and ingestion of poultry. During the first crisis, consumers reacted quickly and intensely (74% of them had already stopped eating poultry in January 2004). Nevertheless, once the crisis abated, they quickly resumed their consumption of poultry. This behavior corresponds to the pattern described by empirical studies of other crises, such as BSE. What is more surprising is the speed with which the different steps of this common pattern succeeded one another. It may be explained by a rapid decrease in risk anxiety. A logit model shows that, soon after the beginning of the crisis, AI risk anxiety was tempered by confidence in the information and recommendations issued by the government concerning AI and, in the long term, by a high perceived self-efficiency to deal with AI. Indeed, not only has poultry consumption been affected in terms of the quantity consumed, but alternative ways of selecting and preparing poultry have also been adopted as anti-risk practices. Risk communication strategies should take this into account, and rely on a previous assessment of consumer practices adopted to deal with the risk.     

Semiparametric estimation of plane similarities: application to fast computation of aeronautic loads

In the big data era, it is often needed to resolve the problem of parsimonious data representation. In this paper, the data under study are curves and the sparse representation is based on a semiparametric model. Indeed, we propose an original registration model for noisy curves. The model is built transforming an unknown function by plane similarities. We develop a statistical method that allows to estimate the parameters characterizing the plane similarities. The properties of the statistical procedure are studied. We show the convergence and the asymptotic normality of the estimators. Numerical simulations and a real-life aeronautic example illustrate and demonstrate the strength of our methodology.     

Adverse Life Experiences and Homelessness Among Adolescents: an examination of the conditions for convergence

Abstract

There are two factors that limit our knowledge of the risk factors associated with homelessness among runaway adolescents, namely (1) the samples used are often composed of youth homeless service users and/or youths living on the streets (visible homelessness), whereas most adolescents in fact use “private” resources (hidden homelessness), and (2) failure to use an adequate control group to identify risk factors associated specifically with homelessness. Our study compares the characteristics of two groups of youths under the supervision oftheyouth protection system, according to the presence or absence of periods of homelessness. The results throw light on the factors underlying the shiftfrom “at risk” to “homeless”, showing that youths with experience of homelessness are more likely to have been placed in substitute home environments, have experienced significant relationship difficulties with one of their parents (deterioration ofthe parent/youth relationship and parental abuse) and to have been diagnosed with behavioral disorders. The findings suggest that the decision to place young people under supervision is based more on the dynamic between risk factors rather than on the existence of behavioral problems.     

Elderly migration: For sun and money

Discussions about elderly migration and its implications for growth planning tend to neglect the role of economic forces. Our view is that cost-of-living variations among states give elderly households on fixed incomes an incentive to move that closely resembles the effects of wage opportunities on workers who migrate. To test this view, we employ a state-by-state index of cost of living for a retired couple to explore its impact on migration choices of the elderly. The effects of cost of living on migration are investigated in terms of the probability that an elderly person will move out-of-state during a five-year period and the probability that a given state will be chosen as destination once a decision has been made to migrate. The influences of cost of living at both origin and destination are strongly confirmed.     

Elderly migration: For sun and money

Discussions about elderly migration and its implications for growth planning tend to neglect the role of economic forces. Our view is that cost-of-living variations among states give elderly households on fixed incomes an incentive to move that closely resembles the effects of wage opportunities on workers who migrate. To test this view, we employ a state-by-state index of cost of living for a retired couple to explore its impact on migration choices of the elderly. The effects of cost of living on migration are investigated in terms of the probability that an elderly person will move out-of-state during a five-year period and the probability that a given state will be chosen as destination once a decision has been made to migrate. The influences of cost of living at both origin and destination are strongly confirmed.     

Instable career paths among workers 45 and over: Insight gained from long-term career trajectories

The study presented in this article focused on the instable career paths of older workers. The study, which is based on the life course approach, had two objectives: 1) identify the main variables which, through their interactions, characterized end-of-career paths; 2) piece together, from the beginning of the career onward, the sequence of key events, transitions, and turning points in the career trajectories that preceded these paths. The results, based on an analysis of in-depth interviews with 32 Canadian workers 45 years and older, showed that these participants' particular career path was characterized by considerable interdependent precariousness whose effects accumulated and intensified as the workers aged. The results also show that this career path was preceded by two distinct career trajectories: one named “fragmented,” which was punctuated by discontinuity and breaks of all kinds, and the other called “severed,” which was characterized by the sudden loss of a career job. Finally, the link between the end-of-career path seen here and the trajectories that preceded it sheds at least some light on the processes that can lead to an instable end-of-career path. These processes were condensed in our discussion into two distinct career biographies.     

Immigrant Children: Their Experience of Violence at School and Community in Host Country

This article describes our qualitative sociological study of immigrant children's life experiences of violence. We conducted interviews with 42 first‐generation immigrant children from any country, aged 9–13 years old, living in the Quebec City region (Canada). Results from three main themes are presented: representations of violence and concrete violent acts experienced; perceived effects of violence on children health and well‐being; and reactions and coping strategies. Overall, the narratives show that they may experience racist peer violence in school that leads to suffering situations, and they consequently have to develop strategies to maintain their well‐being. Social implications are discussed.     

Families' values and attitudes regarding responsibility for the frail elderly: implications for aging policy

This study examines the norms and values associated with care to disabled and frail aging parents, in particular those with regard to the sharing of responsibilities for care between families and formal services, and this within three age cohorts in Quebec, Canada. It is based on a telephone interview of 1,315 people. Factor analysis yielded four factors: (1) family responsibility; (2) uncompromising family obligations; (3) acceptance of services; (4) distrust of services. Analyses of the data indicate that all three age cohorts consider that families have responsibilities for their aging family members, at the same time that they score very high on the acceptance of service scale. This article discusses these seemingly paradoxical results and their implications for aging policy.