![]() Stress et santé des dirigeants de PMEAngenot, Arnaud ; Schippers, Nathalie ; et alConference (2012, July 12) Comme l’atteste l’Institut National de la Santé et de la Recherche Médicale ([INSERM], 2011), il est aujourd’hui devenu nécessaire de pouvoir mieux identifier les sources de stress chez les travailleurs ... [more ▼] Comme l’atteste l’Institut National de la Santé et de la Recherche Médicale ([INSERM], 2011), il est aujourd’hui devenu nécessaire de pouvoir mieux identifier les sources de stress chez les travailleurs indépendants. Parmi ceux-ci, les dirigeants de Petites et Moyennes Entreprises (PME) sont fréquemment victimes de problèmes de santé liés à une charge physique et mentale élevées (Bournois, Duval-Hamel, Scarengella & Roussillon, 2007 ; Gunnarsson, Vingard & Josephson, 2007). S’appuyant sur ces constats, cette étude a eu pour objectif d’évaluer leur sentiment d’épuisement professionnel et de déterminer les causes de stress spécifiques au milieu entrepreneurial. Pour ce faire, une enquête par questionnaire écrit a été menée à la demande de différentes organisations patronales belges du secteur de la construction et de la vente. [less ▲] Detailed reference viewed: 32 (8 ULg) Stress et stimulation au sein des centres de contact: Etude sur le bien-être au travail.DE CIA, Julie ; Naedenoen, Frédéric ; et alConference (2012, July) Problématique: De nombreux travaux tendent à considérer l’organisation du travail dans les centres de contact sous les traits d’un taylorisme moderne (Buscatto, 2002; Zapf, Isic, Bechtoldt & Blau, 2003 ... [more ▼] Problématique: De nombreux travaux tendent à considérer l’organisation du travail dans les centres de contact sous les traits d’un taylorisme moderne (Buscatto, 2002; Zapf, Isic, Bechtoldt & Blau, 2003). L'usage de technologies permettant de produire un flux constant d'activités couplé à des dispositifs visant à un contrôle précis des activités a fortement contribué à l'image de nouvelles "télé-usines du tertiaire" et a attiré nombre de critiques. L’objectif de cette étude est d’identifier les risques psychosociaux spécifiques au secteur des centres de contact en Belgique, en déclinant ces risques en fonction de diverses variables liées au contexte (type de centres de contact, type d’activité, etc.) et de proposer des pistes d’amélioration concrètes des conditions de travail vécues par ces opérateurs. Méthodologie: Un questionnaire d’évaluation des risques psychosociaux a été construit sur base d’une revue de la littérature sur le secteur et d’un modèle théorique expliquant le bien-être au travail : le Job Demands-Resources Model (Demoureti, Bakker, Nachreiner & Schaufeli, 2001). Ce questionnaire visait à évaluer les demandes auxquelles les travailleurs sont confrontés ainsi que les ressources disponibles dans ce contexte de travail particulier. L’impact de cet équilibre demandes-ressources sur différentes mesures du vécu au travail a également été évalué par des échelles validées mesurant le stress, la stimulation et des conséquences en termes de bien-être comme l’implication, la satisfaction au travail et l’intention de quitter, notamment. Les données ont été récoltées auprès de 393 opérateurs de centres de contact représentant la diversité de ce secteur (centres de contact externes et internes, couvrant diverses activités et traitant différents types d’appels). Résultats: Les résultats montrent que le stress est important dans les centres de contact mais ils soulignent surtout le faible niveau de stimulation dans ce secteur. Certaines ressources permettent de prédire la stimulation des travailleurs comme les possibilités de développement personnel en termes d’épanouissement dans l’activité et de perspective d’évolution de carrière. Une mauvaise gestion de la relation client et la routine perçue dans le travail sont des contraintes qui par contre, diminuent la stimulation et augmentent le stress perçu. Des différences entre les différents types de centres de contact ont également été mises en évidence. Les opérateurs des centres de contact «outsourcés», réalisant plutôt de la gestion des plaintes et du support technique, rapportent une mauvaise perception de leurs conditions de travail et un mal-être plus important au travail. Le secteur des télécommunications semblent être le secteur d’activité le plus problématique en Belgique. Implications: Cette étude permet de suggérer une série d’actions d’amélioration des conditions de travail qui seront détaillées lors de la conférence. [less ▲] Detailed reference viewed: 21 (11 ULg)![]() Stress interaction in column webs; Jaspart, Jean-Pierre ![]() in Proceedings of the Ninth International Conference on Metal Structures (1995) Detailed reference viewed: 3 (1 ULg) Stress management workshopGosset, Christiane ; in Case Studies Pack, Volume I, Healthy Cities Symposium (1989) Detailed reference viewed: 1 (0 ULg) Stress negative Piétrain boars and their hybrids - Growth performances and semen qualityDo Duc, Luc ; ; Farnir, Frédéric et alPoster (2011, July) A total of 15 boars from 3 genetic groups were used for this study, including 5 Piétrain boars (purebred Piétrain), 5 ♀Duroc × ♂Piétrain (½ Piétrain) and 5 ♀(Piétrain × Duroc) × ♂Duroc (¼ Piétrain) in ... [more ▼] A total of 15 boars from 3 genetic groups were used for this study, including 5 Piétrain boars (purebred Piétrain), 5 ♀Duroc × ♂Piétrain (½ Piétrain) and 5 ♀(Piétrain × Duroc) × ♂Duroc (¼ Piétrain) in order to evaluate the growth performance and sperm quality of stress negative Piétrain boars and their hybrids. Testing period started at an average age of 60 days and ended at an average age of 225 days. The growth performances were weights at starting and finishing periods, average daily gain, backfat thickness, longissimus depth and lean content. The sperm quality was assessed using ejaculate volume, spermatozoon motility, sperm concentration, total number of spermatozoon in the ejaculate, rate of abnormal spermatozoon and pH of sperm. All these measurements were used to compare the genetic groups. The results showed that: The average daily gain of stress negative Piétrain boar purebred was not significantly different from Piétrain hybrids while the lean content was higher. The ejaculate volume and the spermatozoon motility of stress negative Piétrain purebred boars were higher than Piétrain hybrids but the sperm concentration and the total number of spermatozoon in the ejaculate were lower. [less ▲] Detailed reference viewed: 60 (12 ULg) Stress oxydant : comment évaluer le statut du patient?Pincemail, Joël ; Haleng, Jeanine ; Le Goff, Caroline et alin Nutrition Infos (2007), (oct/nov/déc), 47-50 Detailed reference viewed: 50 (8 ULg) Stress oxydant et antioxydants: mythes et réalités.Defraigne, Jean-Olivier ; Pincemail, Joël ![]() in Revue Médicale de Liège (2008), 63 Detailed reference viewed: 50 (7 ULg) Stress oxydant et fluidité membranaire du globule rouge du cheval athlète : effets de l’exercice et de la complémentation en antioxydants; ; Lekeux, Pierre et alin 31ème Journée de la Recherche Equine des Haras Nationaux (2005) Detailed reference viewed: 13 (3 ULg) Stress oxydant, anti-oxydants et vieillissementPincemail, Joël ; Petermans, Jean ![]() Conference (2012, April 26) Detailed reference viewed: 17 (5 ULg) Le stress oxydantHaleng, Jeanine ; Pincemail, Joël ; Defraigne, Jean-Olivier et alin Revue Médicale de Liège (2007), 62(10), 628-38 Oxidative stress is defined as an imbalance between the production of reactive oxygen species (ROS) and the antioxidant network, in favour of the former. Our lifestyle (smoking, alcoholism, obesity ... [more ▼] Oxidative stress is defined as an imbalance between the production of reactive oxygen species (ROS) and the antioxidant network, in favour of the former. Our lifestyle (smoking, alcoholism, obesity, intense physical exercise), but also our inadequate diet, contributes to significantly increase the production of ROS in our organism. This is potentially associated with an increased risk of developing ageing-related pathologies such as cardiovascular diseases and cancer. As a matter of prevention, it is necessary to have in hands a high technology allowing to correctly evidence the oxidative stress status of an individual in order to render optimal our antioxidant defences and to decrease the oxidative damages in DNA, proteins and lipids. [less ▲] Detailed reference viewed: 1087 (14 ULg) Stress professionnel : les enjeux du diagnostic. Présentation de la méthode WOCCQSpitz, Hélène ; Peters, Stéphanie ; Hansez, Isabelle ![]() Conference (2008, June) Detailed reference viewed: 61 (4 ULg) Stress strain relationship of Tempcore steel after heating up to 650°C and coolingFranssen, Jean-Marc ![]() Report (1993) Reinforcing bars of 12 mm and 25 mm have been tested, at room temperature, at elevated temperatures (steady state and transient conditions), and after cooling from elevated temperatures. No decrease of ... [more ▼] Reinforcing bars of 12 mm and 25 mm have been tested, at room temperature, at elevated temperatures (steady state and transient conditions), and after cooling from elevated temperatures. No decrease of the residual strength was observed as long as the elevated temperature has not exceeded 600°C. A slight decrease seems to appear for elevated temperatures beyond 600°C. Additional test for elevated temperatures higher than 680°C should ideally be performed to confirm this trend. [less ▲] Detailed reference viewed: 78 (1 ULg) Stress testing for the evaluation of patients with mitral regurgitationLancellotti, Patrizio ; Magne, Julien ![]() in Current Opinion in Cardiology (2012), 27(5), 492-498 Detailed reference viewed: 12 (0 ULg) Stress testing in valvular heart disease: Clinical benefit of echocardiographic imaging; Lancellotti, Patrizio ; Magne, Julien et alin Expert Review of Cardiovascular Therapy (2011), 9(1), 81-92 Detailed reference viewed: 4 (1 ULg) Stress, coffe drink, tobacco and alcohol consumption in a student sample of smokersDelvaux, Muriel ![]() Poster (2006, May) Emotional responses to stress play an important role in health behavior change. During times of low and high academic demands, health behaviors tend to be deteriorated in college undergraduate students ... [more ▼] Emotional responses to stress play an important role in health behavior change. During times of low and high academic demands, health behaviors tend to be deteriorated in college undergraduate students (Weidner et al., 1996). A similar study found increasing anxiety and smoking behaviors, but a decrease in the consumption of alcohol during the examination period in medical students (Ogden & Mtandabari, 1997). In current smokers, mean score on Perceived Stress Scale is significantly higher than that of the students who don’t smoke (Naquin & Gilbert, 1996). [less ▲] Detailed reference viewed: 25 (1 ULg) A stress-based approach to the optimal design of structures with unilateral behavior of material or supports; Duysinx, Pierre ![]() in Structural and Multidisciplinary Optimization (2012), 46(3), 369-384 The paper deals with a formulation for the topology optimization of elastic structures that aims at minimizing the structural weight subject to compliance and local stress constraints. The global ... [more ▼] The paper deals with a formulation for the topology optimization of elastic structures that aims at minimizing the structural weight subject to compliance and local stress constraints. The global constraint provides the expected stiffness to the optimal design while a selected set of local enforcements require feasibility with respect to the assigned strength of material. The Drucker–Prager failure criterion is implemented to handle materials with either equal or unequal behavior in tension and compression. A suitable relaxation of the equivalent stress measure is implemented to overcome the difficulties related to the singularity problem. Numerical examples are presented to discuss the features of the achieved optimal designs along with performances of the adopted procedure. Comparisons with pure compliance–based or pure stress–based strategies are also provided to point out differences arising in the optimal design with respect to conventional approaches, depending on the assumed material behavior. [less ▲] Detailed reference viewed: 18 (0 ULg) Stress-induced decreases in local cerebral glucose utilization in specific regions of the mouse brain.Warnock, Geoffrey ; in BMC Research Notes (2011), 4 BACKGROUND: Restraint stress in rodents has been reported to activate the hypothalamic-pituitary-adrenocortical (HPA) axis and to increase c-fos expression in regions that express components of the ... [more ▼] BACKGROUND: Restraint stress in rodents has been reported to activate the hypothalamic-pituitary-adrenocortical (HPA) axis and to increase c-fos expression in regions that express components of the corticotropin-releasing factor (CRF) system. We have previously reported that acute central administration of CRF increased a measure of relative local cerebral glucose utilization (LCGU), a measure of neuronal activity in specific brain regions, and activated the HPA axis in mice. It was hypothesized that the involvement of the CRF system in the stress response would lead to similar changes in relative LCGU after restraint stress. In the present studies the effect of restraint stress on relative LCGU and on the HPA axis in C57BL/6N mice were examined. FINDINGS: Restraint stress activated the HPA axis in a restraint-duration dependent manner, but in contrast to the reported effects of CRF, significantly decreased relative LCGU in frontal cortical, thalamic, hippocampal and temporal dissected regions. These findings support evidence that stressors enforcing limited physical activity reduce relative LCGU, in contrast to high activity stressors such as swim stress. CONCLUSIONS: In conclusion, the present studies do not support the hypothesis that stress-induced changes in relative LCGU are largely mediated by the CRF system. Further studies will help to delineate the role of the CRF system in the early phases of the relative LCGU response to stress and investigate the role of other neurotransmitter systems in this response. [less ▲] Detailed reference viewed: 15 (7 ULg) Stress-induced metabolites in potato in response to ampicillin elicitation.Ongena, Marc ; ; Thonart, Philippe et alPoster (1999, July) Detailed reference viewed: 3 (0 ULg) Stress-induced premature senescence. Essence of life, evolution, stress, and aging.; ; et al in Annals of the New York Academy of Sciences (2000), 908 Detailed reference viewed: 11 (1 ULg) Stress-induced signaling pathways in hyalin chondrocytes: inhibition by Avocado-Soybean Unsaponifiables (ASU).; ; et al in Osteoarthritis and Cartilage (2008), 16(3), 373-84 OBJECTIVE: Avocado-Soybean Unsaponifiables (ASU) represent one of the most commonly used drugs for symptomatic osteoarthritis (OA). The mechanisms of its activities are still poorly understood. We ... [more ▼] OBJECTIVE: Avocado-Soybean Unsaponifiables (ASU) represent one of the most commonly used drugs for symptomatic osteoarthritis (OA). The mechanisms of its activities are still poorly understood. We investigate here the effects of ASU on signaling pathways in mouse or human chondrocytes. METHODS: Mouse or human chondrocytes stimulated with interleukin-1beta (IL1beta, 10 ng/ml) and cartilage submitted to a compressive mechanical stress (MS) were studied in the presence or absence of ASU (10 microg/ml). Nuclear factor kappaB (NF-kappaB) activation was assessed by immunoblot, using an I-kappa B alpha antibody, nuclear translocation of NF-kappaB using p65 antibody, and extra-cellular signal-regulated kinase (ERK)1/2 activation using phospho and ERK1/2 antibodies. The binding of the p50/p65 complex on DNA was studied by electrophoretic mobility shift assay. RESULTS: ASU decrease matrix metalloproteinases-3 and -13 expressions and Prostaglandin E(2) (PGE(2)) release in our model. The degradation of I-kappa B alpha is prevented in the presence of ASU as shown by the persistent expression of I-kappa B alpha protein in the cytosol when chondrocytes are stimulated by IL1beta or MS. Nuclear translocation of the NF-kappaB complex is shown by the decrease of the p65 protein from the cytosol, whereas p65 appears in the nucleus under IL1beta stimulation. This translocation is abolished in the presence of ASU. Moreover, bandshift experiments show an inhibition of the IL1beta-induced binding of p50/p65 complexes to NF-kappaB responsive elements in response to ASU. Finally, among the different mitogen-activated protein kinases known to be induced by IL1beta, ERK1/2 was the sole kinase inhibited by ASU. CONCLUSION: These results demonstrate that ASU express a unique range of activities, which could counteract deleterious processes involved in OA, such as inflammation. [less ▲] Detailed reference viewed: 32 (2 ULg) |
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