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Lyon, France

The École centrale de Lyon, founded in 1857, is one of the oldest graduate schools in France. It is considered as one of the most prestigious French grandes écoles of engineering continuously ranking as one of the top six French engineering research institutions for the post bachelor study. The university is situated in Écully, a western suburb of Lyon, France .The university is one of the six members of the Centrale Graduate School . The school is well-reputed for educating and training highly skilled engineers with a minimum degree of BSc through many specialized postgraduate programs. Ecole centrale de Lyon is a founding member of University of Lyon, Pole Research and Higher Education established as a public establishment of scientific cooperation. The school excels in the research attached to acoustics, bioscience and nanotechnology.Ecole centrale de Lyon, or as sometimes referred to ECL, has strong ties with top institutions in Europe including Imperial College London and Darmstadt University of Technology. This in addition to having most of its post graduate programs shared between INSA Lyon, École Normale Supérieure de Lyon and Claude Bernard University Lyon 1. Wikipedia.

This overview of photocatalytic purification/deodorization of indoor air using TiO2 includes four parts. First, considering that TiO2 exposed to indoor air - which contains several thousands ppmv of water - is covered by layers of water molecules, it is suggested that: (i) the approach to the surface of pollutants at ppbv concentrations is hindered, (ii) the pollutants are not dissociated by mere adsorption, (iii) OH radicals are formed by mechanisms identical to those proposed for TiO2 exposed to liquid water, and (iv) OH radicals are mobile within the adsorbed water layers. Second, the formation and role of superoxide, singlet molecular oxygen and labile surface oxygen atoms of TiO2 are reviewed. Third, the competition between pollutants at ppbv levels for elimination under usual conditions of purifiers is discussed. Fourth, the question of the effect of indoor air photocatalytic treatment on the average concentration of low-molecular-mass carbonyls is addressed. © 2010 Elsevier B.V.

The behavior of a tandem of symmetric flapping wings immersed in a quiescent viscous fluid is numerically dissected. The attention focuses on the effect on the flight performance of a solid surface which idealizes the presence of the ground. A wide numerical campaign is carried out. The author demonstrates that the presence of a solid surface can drastically modify the lift force, thus giving a remarkable advantage for the vertical take-off. Therefore, a proper governing parameter is proposed, which accounts for the ratio between the initial gap from the solid surface and the length of the wing. © 2015 Elsevier Ltd. All rights reserved.

Ziada S.,Ecole Centrale Lyon
Journal of Pressure Vessel Technology, Transactions of the ASME | Year: 2010

The excitation mechanism of acoustic resonances has long been recognized, but the industry continues to be plagued by its undesirable consequences; manifested in severe vibration and noise problems in a wide range of industrial applications. This paper focuses on the nature of the acoustic resonance excitation mechanism for the case of closed side branches because of its relative importance to industrial applications. Design charts are presented for the Strouhal number at the onset of acoustic resonance and for the acoustic source strength representing the integral effect of the shear layer at the mouth of the side branch. Because these design charts are developed from tests of cylindrical pipes conveying turbulent flow at high Reynolds numbers, they can be used in industrial applications to predict the onset flow velocity and the intensity of acoustic resonances in side branches. Two industrial examples involving flow-excited acoustic resonance of closed side branches are presented. The first example deals with acoustic fatigue failure of the steam dryer in a boiling water reactor due to acoustic resonance in the main steam piping system, whereas the second example considers acoustic resonances in the roll posts of the short take-off vertical lift (STOVL) joint strike fighter. In both examples, effective means to alleviate the acoustic resonance mechanism are discussed. Copyright © 2009 by ASME.

Pichat P.,Ecole Centrale Lyon
Catalysis Today | Year: 2014

In the domain of semiconductor photocatalysis, infrared spectroscopy is a technique able to provide information inter alia upon: the generation, accumulation, scavenging and/or trapping of electronic charges under band-gap irradiation; the surface radicals existing during or after irradiation; the irradiation effects on the interactions of the surface with water; surface species not observed in the fluid phase; the texture, structure and surface properties of photocatalysts and photocatalytic coatings. In practice, the challenges are to achieve conditions as close as possible to those of the photocatalytic reactions, especially satisfactory irradiation of the photocatalyst by both the exciting photons and the infrared beam. As usual in infrared spectroscopy, labeled molecules can be employed to ascertain the attributions of the vibrational bands. Obviously, time-resolved infrared spectroscopy is extremely useful regarding the basic photocatalytic mechanisms. © 2013 Elsevier B.V.

Agency: Cordis | Branch: H2020 | Program: MSCA-ITN-ETN | Phase: MSCA-ITN-2015-ETN | Award Amount: 3.90M | Year: 2016

The Arctic plays a key role in the Earths climate system and is an area of growing strategic importance for European policy. In this ETN, we will train the next generation of Arctic microbiology and biogeochemistry experts who, through their unique understanding of the Arctic environment and the factors that impact ecosystem and organism response to the warming Arctic, will be able to respond to the need for leadership from public, policy and commercial interests. The training and research programme of MicroArctic is made up of seven interlinked Work Packages (WP). WP1 to WP4 are research work packages at the cutting edge of Arctic microbiology and biogeochemistry and these will be supported by three overarching WPs (WP5-7) associated with the management, training and dissemination of results. WP1 will deliver information about the role of external inputs (e.g., atmospheric) of nutrients and microorganism that drive biogeochemical processes in relation to annual variation in Arctic microbial activity and biogeochemical processes. WP2 will explore ecosystem response on time scales of 100s of years to these inputs using a chrnosequence approach in the already changing Arctic. The effect of time and season and the warming of the Arctic on ecosystem functioning and natural resources will be quantified through geochemical analyses and next generation multi-omics approaches. Complementing WP1 and WP2, WP3 will focus on organism response and adaptation using a range of biochemical, molecular, experimental and culturing approaches. WP4 will address specific applied issues such as colonisation by pathogenic organisms and biotechnological exploitation of Arctic ecosystems. MicroArctic will bring together interdisciplinary experts from both the academic and non-academic sectors across Europe into a network of 20 Institutions across 11 countries.

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