Electrodeposition of arrays of Ru, Pt, and PtRu Alloy 1D metallic nanostructures

Arrays of Ru, Pt, and PtRu one dimensional 1D nanowires NWs and nanotubes NTs were prepared by electrodeposition through the porous structure of an anodic aluminum oxide AAO membrane. In each case, micrometer-long NW and NT were formed with an outer diameter of ca. 200 nm, close to the interior diameter of the porous AAO membrane. Arrays of NW and NT can be formed by varying the metallic salt concentration, the applied potential, and the conductivity of the electrolyte. The Ru and Pt deposition rates were measured in the various deposition conditions, using an electrochemical quartz crystal microbalance. The mechanisms responsible for the formation of Ru and Pt NW and NT are discussed based on the observed deposition rates and models found in the literature. Finally, it is shown that arrays of PtRu alloy NT and NW can be readily prepared and their compositions can be varied over the whole compositional range by changing the metallic salt concentration of the electrodeposition bath

Sensitivity analysis of energy performance and thermal comfort throughout building design process

In a traditional building design process (TDP), design variables are fixed sequentially, as opposed to integrated design process (IDP) which tends to avoid sequential design phases to create more sustainable buildings. First, a reference building is introduced and an energy model based on TRNSYS is presented to determine the energy consumption and comfort in the building. The model is validated based on energy bills, certified simulations and literature. Then, the paper performs an extended sensitivity analysis (SA) of 30 design variables with respect to different performance criteria related to energy consumption and comfort, based on a TRNSYS model. Three SA techniques were used, namely standard regression coefficients (SRC), partial rank correlation coefficients (PRCC) and Sobol indices. Results show that all three techniques yielded a similar ranking of the importance of the variables for most model outputs. Interactions between variables were identified with second-order Sobol indices. In the second part of this paper, a traditional design framework was adopted in which sets of variables were fixed sequentially. A SA was performed at each phase of the process, assuming fixed values for parameters chosen in previous design phases. Results show that fixing variables during the phases of a traditional design process tends to reduce the probabilities of finding low-energy consumption designs. Moreover, the influence of some variables was found to change during the design phases

Performance of a sequential versus holistic building design approach using multi-objective optimization

Integrated design processes are currently pushed forward in order to achieve net-zero energy building designs at affordable cost. Through a case study of a residential building, this paper compares a sequential versus a holistic design approach based on multi-objective optimization. In the holistic approach, 39 design variables related to the architecture and HVAC systems are simultaneously optimized. In the sequential approach, the architecture variables are first optimized; several optimal solutions are then selected for the second phase optimization of the heating system parameters. Carbon footprint, life cycle cost and thermal comfort are optimized by the algorithm NSGA-II. With only 100 computational hours, the holistic approach found 59% of the optimal solutions, whereas it took 765 h to find 41% of the optimal solutions with the sequential approach. This comparison shows the negative effects of making irreversible variable selections in the early phase of a design process, as it reduces the ability to find optimal solutions in the end

Dynamic Energy Storage Management for Dependable Renewable Electricity Generation

© 2013 Blonbou et al., licensee InTech. This is an open access chapter distributed under the terms of th

Synthesis of Model BC Bicycles of Taxol Using C10-C11 Ring-Closing Metathesis Strategy

6 pagesInternational audienceModel BC ring-systems of taxol 23b and 28b, which lack an oxygenated substituent at C7, have been efficiently synthesized. The key step is a ring-closing metathesis (RCM) to form the 8-membered B ring between C10 and C11. Comparison of the metathesis reaction in this route with the RCM used in a previous study with similar substrates is highlighted

Pour une histoire des festivals (XIXe-XXIe siècles)

Manifestation profuse et stimulante, le colloque international « Pour une histoire des festivals (XIXe-XXIe siècles) » s’est tenu du 24 au 26 novembre 2011 en région parisienne. Initié par le Centre d’Histoire sociale du XXe siècle (Université Paris 1) et le Centre d’Histoire culturelle des sociétés contemporaines (Institut d’études culturelles – Université de Versailles Saint-Quentin-en-Yvelines), sa première originalité résidait dans un comité d’organisation exclusivement féminin (Anaïs Flé..

Joxean Fernández (dir.), Cinéma basque. Trois générations de cinéastes

Depuis 1978, la Filmoteca vasca-Euskadiko filmategia préserve, conserve et diffuse le cinéma basque et Joxean Fernández, coordinateur de la présente publication, est arrivé à sa direction en 2010. Auparavant maître de conférences d’espagnol à l’université de Nantes, il a soutenu une thèse en 2006 sur « Cinéma et guerre civile au pays basque (1936-1939) ». Quelques-unes de ses initiatives tendent à resserrer les liens avec le côté français du pays basque. Ainsi remarquera-t-on en 2019, une rét..

Colloque Exposer (le cinéma) dans l’entre-deux-guerres

Organisées par le Centre d’histoire culturelle des sociétés contemporaines (CHCSC) avec le soutien du Centre interdisciplinaire d’études et de recherches sur l’Allemagne (CIERA), les journées d’études « Exposer dans l’entre-deux-guerres : enjeux politiques, économiques et artistiques » se sont déroulées à Paris les 19 et 20 novembre 2010, sous la direction de Caroline Moine, Alexandre Kostka et Martin Schieder, second volet du projet « Montrer, exposer, représenter en Allemagne et en France (..

Colloque Exposer (le cinéma) dans l’entre-deux-guerres

Organisées par le Centre d’histoire culturelle des sociétés contemporaines (CHCSC) avec le soutien du Centre interdisciplinaire d’études et de recherches sur l’Allemagne (CIERA), les journées d’études « Exposer dans l’entre-deux-guerres : enjeux politiques, économiques et artistiques » se sont déroulées à Paris les 19 et 20 novembre 2010, sous la direction de Caroline Moine, Alexandre Kostka et Martin Schieder, second volet du projet « Montrer, exposer, représenter en Allemagne et en France (..

Olivier Lugon (dir.), Exposition et médias. Photographie, cinéma, télévision

En octobre 2009, le Centre des Sciences historiques de la culture de l’Université de Lausanne organisait le colloque Exposition et médias. Photographie, cinéma, télévision dont les actes sont désormais publiés, sous ce même titre, à l’Âge d’homme dans la collection « Histoire et théorie du cinéma / Travaux ». L’ensemble s’intègre au projet « l’exposition moderne de la photographie (1920-1970) », soutenu par le Fonds national suisse de recherche scientifique et chapeauté par Olivier Lugon. Hor..