9 research outputs found

    Semiconducting Metal Oxide Based Sensors for Selective Gas Pollutant Detection

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    A review of some papers published in the last fifty years that focus on the semiconducting metal oxide (SMO) based sensors for the selective and sensitive detection of various environmental pollutants is presented

    Production d eau potable par condensation passive de l humidité atmosphérique (rosée)

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    Le travail de thèse a pour objectif d estimer précisément la quantité d eau que l on peut espérer collecter par la rosée dans le village côtier de Mirleft (Maroc), de la comparer avec le brouillard, la pluie et d estimer sa qualité. La mise en place à Mirleft d une station de mesure a permis d obtenir des données concernant la période comprise entre le 01/05/2007 et le 31/04/2008. L eau de rosée représente 40 % de l apport annuel en pluie et apparaît donc comme une composante essentielle de l apport hydrique total. Une approche mathématique de la modélisation de la rosée a estimé son rendement sur une quinzaine de sites répartis sur tout le territoire du Maroc. Concernant les analyses chimiques, les pH moyens de la rosée et de la pluie sont respectivement égaux à 7,40 et 6,85 avec une conductivité moyenne de 727,25 et 316 S/cm, représentant une minéralisation totale de 150 mg L-1. Une analyse en composante principale a été réalisée sur les données afin d identifier l origine possible des ions. Pour estimer la contribution marine et non marine de ces ions, la fraction du sel provenant de la mer (SSF) a été calculée. On a constaté l influence du climat sur la chimie de la rosée et par conséquent les variations temporelles. Les quantités d ions mesurées et les analyses biologiques montrent que l eau de rosée est potable vis-à-vis des recommandations de l OMS. Les résultats en termes de rendements associés aux analyses chimiques de l eau de rosée et le succès du condenseur de démonstration dans différentes régions où notre équipe a réalisé ces recherches nous ont incité à équiper avec succès des grands systèmes de collectes à Idousskssou (8 km SE de Mirleft) pour l usage de la population locale.PARIS-BIUSJ-Sci.Terre recherche (751052114) / SudocSudocFranceF

    Enhancing dependability through profiling in the collaborative internet of things

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    Collaborative Internet of Things (C-IoT) Data Analysis for Enhancing Activity Recognition and Preventing Serious Health Problems

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    International audienceCollaborative Internet of Things (C-IoT) is an emerging paradigm that has generated a large amount of accessible and usable data in real-time, constituting an interesting tool for decision-making problems. The paper presents a healthcare data analytics approach based on collecting and analyzing data from C-IoT. We first provide an architectural plan involving several distributed sites collaborating to collect necessary data for patient's health conditions monitoring. We use for that wellknown IoT technologies like Radio Frequency IDentification (RFID), Near Field Communication(NFC), Beacons and Ambient Assisted Living sensors. We then learn on such data to create adequate patient profiles and use the Pearson Correlation Coefficient (PCC) over a long period of time data to detect potential health risks. Finally, decisions are made regarding the patient's condition according to the symptoms/diseases detected

    Rilpivirine in HIV-1-positive women initiating pregnancy: to switch or not to switch?

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    International audienceBackgroundSafety data about rilpivirine use during pregnancy remain scarce, and rilpivirine plasma concentrations are reduced during second/third trimesters, with a potential risk of viral breakthroughs. Thus, French guidelines recommend switching to rilpivirine-free combinations (RFCs) during pregnancy.ObjectivesTo describe the characteristics of women initiating pregnancy while on rilpivirine and to compare the outcomes for virologically suppressed subjects continuing rilpivirine until delivery versus switching to an RFC.MethodsIn the ANRS-EPF French Perinatal cohort, we included women on rilpivirine at conception in 2010–18. Pregnancy outcomes were compared between patients continuing versus interrupting rilpivirine. In women with documented viral suppression (<50 copies/mL) before 14 weeks of gestation (WG) while on rilpivirine, we compared the probability of viral rebound (≥50 copies/mL) during pregnancy between subjects continuing rilpivirine versus those switching to RFC.ResultsAmong 247 women included, 88.7% had viral suppression at the beginning of pregnancy. Overall, 184 women (74.5%) switched to an RFC (mostly PI/ritonavir-based regimens) at a median gestational age of 8.0 WG. Plasma HIV-1 RNA nearest delivery was <50 copies/mL in 95.6% of women. Among 69 women with documented viral suppression before 14 WG, the risk of viral rebound was higher when switching to RFCs than when continuing rilpivirine (20.0% versus 0.0%, P = 0.046). Delivery outcomes were similar between groups (overall birth defects, 3.8/100 live births; pregnancy losses, 2.0%; preterm deliveries, 10.6%). No HIV transmission occurred.ConclusionsIn virologically suppressed women initiating pregnancy, continuing rilpivirine was associated with better virological outcome than changing regimen. We did not observe a higher risk of adverse pregnancy outcomes

    Multiphasic effects of blood pressure on survival in hemodialysis patients

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