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— In this paper, we investigate the possibility of designing an observer for a class of continuous-time dynam-ical systems with non-uniformly sampled measurements. More specifically, we propose an observer with a time varying gain witch converges exponentially under some conditions on the sampling partition diameter. The proposed observer is an impulsive(More)
Benzyl chloride (BCl) is a clear yellowish, volatile liquid that is widely used as an intermediate for the production of benzyl alcohol and benzyl compounds used in perfumery, dyes and pharmaceuticals. In previous studies BCl has shown weak and inconsistent mutagenicity in the Salmonella/microsome mutagenesis assay (Ames test). The aim of the present study(More)
Diesel engine emission aerosol-induced toxicity patterns were compared using both in vitro (organotypic cultures of lung tissue) and in vivo experimentations mimicking the inhalation situation with continuous aerosol flow exposure designs. Using liquid media resuspended diesel particles, we show that toxic response pattern is influenced by the presence of(More)
The purpose of the study was to determine Pb and Cd concentrations in humans and to assess the effect of co-exposure to these metals on biomarkers of oxidative stress and nephrotoxicity. Blood and urine levels of Pb and Cd, oxidative stress and urinary renal biomarkers were measured in 77 subjects neighboring a discharge and 52 in the control site. Exposed(More)
Lettuce downy mildew, caused by the oomycete Bremia lactucae Regel, is a major threat to lettuce production worldwide. Lettuce downy mildew is a polycyclic disease driven by airborne spores. A weather-based dynamic simulation model for B. lactucae airborne spores was developed to simulate the aerobiological characteristics of the pathogen. The model was(More)
Résumé L'anesthésie des personnes âgées de 65 ans et plus en urgence reste complexe. La survenue d'incidents peropératoires et en l'occurrence l'hypotension artérielle est conditionnée par leur état de santé initial et par la qualité de la prise en charge péri-opératoire. L'étude a pour but de déterminer l'incidence de l'hypotension artérielle(More)
AIM Since 1968, the World Health Organization has used an international pharmacovigilance programme to monitor and examine the effects of drugs. The purpose of this study was to assess the knowledge and attitudes of dentists toward pharmacovigilance. METHODS The paper presents the results of a cross-sectional descriptive study of 103 dentists in Senegal,(More)
Emergency anesthesia in elderly patients aged 65 years and older is complex. The occurrence of intraoperative incidents and arterial hypotension is conditioned by patients' initial health status and by the quality of intraoperative management. This study aimed to determine the incidence of intra-anesthetic arterial hypotension in elderly patients during(More)
— This paper proposes a state observer with a cascade structure for a class of nonlinear systems in the presence of delayed output measurements. The first system in the cascade allows to estimate the delayed state while each of the remaining ones is a predictor. Each predictor estimates the state of the preceding one with a prediction horizon equal to a(More)