A Dynamic Contextual Change Management Application for Real Time Decision-Making Support

Decision making is a fundamental process within organizations for many reasons. It is indeed involved at all levels (new product decisions, management and marketing decisions, etc.) and has a direct impact on companies’ efficiency and effectiveness. Many researches are conducted to enhance the decision-making process by proposing decision support systems where the most frequent challenge is the change management. Indeed, all businesses operate within an environment that is subject to constant changes (like new customers’ needs and requirements, organisational and technological changes, changes in key information used to derive decisions, etc.). These changes have a major impact on the quality and accuracy of the proposed decision if they are not detected and propagated, at the right time, during the decision-making process. The present work attempts to resolve this challenge by proposing a dynamic change management technique that allows three tasks to be automatically performed. First, continuously detect changes and note them. Second, retrieve from the detected changes those that are related to the decision rules. Finally, propagate them by computing the new value of the decision rule. The proposal has been fully implemented and tested in the supervision process of gas network exploitation.projet FUI Gontran

Bacterial Colonization of Low‐Wettable Surfaces is Driven by Culture Conditions and Topography

Effect of surface low‐wettability on bacterial colonization has become a prominent subject for the development of antibacterial coatings. However, bacteria's fate on such surfaces immersed in liquid as well as causal factors is poorly understood. This question is addressed by using a range of coatings with increasing hydrophobicity, to superhydrophobic, obtained by an atmospheric plasma polymer method allowing series production. Chemistry, wettability, and topography are thoroughly described, as well as bacterial colonization by in situ live imaging up to 24 h culture time in different liquid media. In the extreme case of superhydrophobic coating, substrates are significantly less colonized in biomolecule‐poor liquids and for short‐term culture only. Complex statistical analysis demonstrates that bacterial colonization on these low‐wettable substrates is predominantly controlled by the culture conditions and only secondary by topographic coating's properties (variation in surface structuration with almost constant mean height). Wettability is less responsible for bacterial colonization reduction in these conditions, but allows the coatings to preserve colonization‐prevention properties in nutritive media when topography is masked by fouling. Even after long‐term culture in rich medium, many large places of the superhydrophobic coating are completely free of bacteria in relation to their capacity to preserve air trapping

Plasma deposition of polymer composite films incorporating nanocellulose whiskers

In a trend for sustainable engineering and functionalization of surfaces, we explore the possibilities of gas phase processes to deposit nanocomposite films. From an analysis of pulsed plasma polymerization of maleic anhydride in the presence of nanocellulose whiskers, it seems that thin nanocomposite films can be deposited with various patterns. By specifically modifying plasma parameters such as total power, duty cycle, and monomer gas pressure, the nanocellulose whiskers are either incorporated into a buckled polymer film or single nanocellulose whiskers are deposited on top of a polymeric film. The density of the latter can be controlled by modifying the exact positioning of the substrate in the reactor. The resulting morphologies are evaluated by optical microscopy, AFM, contact angle measurements and ellipsometry

Developpement d'un revetement visant a ameliorer les proprietes d'etancheite d'un joint elastomere en milieu corrosif

International audienc

Développement d'un revêtement visant à améliorer les propriétés d'étanchéité d'un joint élastomère en milieu corrosif

International audienc

Interactions entre objets biologiques et surfaces nanostructurées : quelques illustrations

Les interactions entre les objets biologiques (protéines, cellules, bactéries, ...) et les surfaces jouent un rôle primordial en sciences du vivant, dans le domaine biomédical notamment. Le présent texte est plus particulièrement focalisé sur l'échelle nanométrique de ces interactions. Des surfaces nanostructurées, tant du point de vue chimique que topographique, sont de bons outils pour analyser de telles interactions. Ainsi, quelques aspects concernant : (i) l'adsorption de protéines sur des surfaces moléculaires auto-organisées ou autres surfaces nanostructurées, (ii) l'adhésion bactérienne sur des surfaces polymères nano-organisées, (iii) l'adhésion cellulaire et bactérienne sur des surfaces à nanotopographie et chimie contrôlées (surfaces patternées, arrangement compact de nanobilles, ...), sont brièvement présentés et discutés

Développement d'un revêtement visant à améliorer les propriétés d'étanchéité d'un joint élastomère en milieu corrosif

International audienc