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Search Results: 1 - 10 of 1810 matches for " Arnaud Delebarre "
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Technico-Economical Evaluation of CO2 Transport in an Adsorbed Phase  [PDF]
Mildred Lemus Perez, Manuel Rodriguez Susa, Mario Pellerano, Arnaud Delebarre
Low Carbon Economy (LCE) , 2012, DOI: 10.4236/lce.2012.31004
Abstract: This work considers the possibility to transport CO2 in an adsorbed phase and analyzes its cost as a function of transported quantities, transport conditions and transportation means. CO2 adsorption capacities of 6 different adsorbents, comprising 4 activated carbons and 2 zeolites, were empirically evaluated in a given range of pressure and temperature. The adsorbent with the highest mass adsorption capacity (AC1), as well as another sorbent described in the literature (AC5) were selected to be used for CO2 transportation by ships, trains or trucks. Their characteristics and performances were then used to develop an economic analysis of transportation costs and CO2 emissions generated by the transport with or without storage. Economic evaluation of CO2 batch transport shows that CO2 transported in an adsorbed phase by train was seen to be almost competitive on distances between 250 and 500 km, in comparison to liquefied CO2. One of the activated carbon appeared to be competitive on short distances by truck when transport was not followed by storage. Ship transport of adsorbed CO2 on distances around 1500 km was competitive, when CO2 was used as delivered; there was an over cost of only 16%, when there was storage after the transport. The CO2 emissions generated by CO2 transport and storage when transport is carried out in an adsorbed phase were smaller than the ones generated by liquid phase transport below 1200 km, 500 km and 300 km by ship, train and truck respectively, as a function of the adsorbent used. Adsorbed CO2 transported on 1500 km by ship generated 27% less CO2 emissions than liquid phase and 17% by train for a distance of 250 km and 16% by truck on 150 km, although these differences were decreasing with the distance of transport.
Wireless Low Cost CO2 Monitoring System Design and Evaluation Using Non Dispersive Infrared Sensor  [PDF]
C. Delebarre, T. Pujolle, G. Cousin, A. Domon, J. Froux, J. Jourdan
Wireless Sensor Network (WSN) , 2018, DOI: 10.4236/wsn.2018.106007
Abstract: This paper presents a new wireless system for the measurement of CO2 gas concentration for indoor and outdoor purposes based on low cost Non Dispersive Infrared sensors. The system has been implemented on a printed circuit board in order to obtain different aspects of the air pollution. Some experiments were achieved to evaluate the total system combined with an android application on a smartphone. Different tests were realized in a closed room nearly filled with students and also directly while driving on the road. Good results were obtained allowing a future use for air pollution mapping using numerous amounts of sensors inside vehicles.
Arts and Scholastic Performance  [PDF]
Arnaud Cabanac
Creative Education (CE) , 2017, DOI: 10.4236/ce.2017.815163
Abstract: Pleasant environmental music during an academic test helped students to overcome stress. As a result the grades they obtained were higher. It was also demonstrated that students selecting music as optional course performed better, than music-less control students over three consecutive years. Yet, there remained ambiguities as for the causes of the higher test performance of these students. Our study confirmed a Mozart effect, and further showed a latency of two to three years for such a positive influence to take place, suggesting that it is the practice of music itself that helps cognition. We showed also that other art courses, when freely chosen, have similar positiveinfluences on students’ performances, illustrating that the principles of learning are linked to hedonism and to will effort in a more general manner.
Power Harvesting Capabilities of SHM Ultrasonic Sensors
Christophe Delebarre,Thomas Sainthuile,Sébastien Grondel,Christophe Paget
Smart Materials Research , 2012, DOI: 10.1155/2012/387638
Abstract: The aim of this work is to show that classical Structural Health Monitoring ultrasonic sensors may provide some power harvesting capabilities from a wide variety of vibration sources. In other words, the authors developed an integrated piezoelectric energy harvesting sensor capable of operating a dual mode, that is, carrying out vibration power harvesting and Structural Health Monitoring. First, vibrations signals of an A380 aircraft recorded during different phases of flight are presented to show the need of a wideband piezoelectric energy harvester. Then, the voltage response of a piezoelectric power harvester bonded onto an aluminium cantilever plate and excited by an electromechanical shaker is measured. A finite element model of the energy harvester system is also presented. This model provides the voltage response of the harvester due to a mechanical excitation of the host structure and allows a better understanding of the energy harvesting process. In many cases, a good agreement with the experimental results is obtained. A power measurement also showed the ability of piezoelectric SHM sensors to harvest power over an extended frequency range present in spectra collected in aircrafts. This result could lead to numerous applications even though this kind of power harvester sensor has been initially designed to operate onboard aircrafts. 1. Introduction Energy harvesting, or scavenging as it is frequently called, provides new opportunities for sensor manufacturers in applications that would otherwise have difficulty obtaining a reliable power source. Adding a power source implies the need for replacements as well as maintenance procedures involving costs increase. Various techniques exist in order to carry out energy harvesting. They are based on light or temperature difference [1], radio frequency [2], inductive coupling, wind energy [3], and mechanical vibration conversion [4–8]. For these purposes, several pieces of equipments are used, such as MicroPelletier, wind turbine, RF energy converter, solar panel, and piezoelectric sensors. In this paper, the authors study the feasibility of developing a Structural Health Monitoring (SHM) system having a double functionality, that is, carrying out SHM tasks but also energy harvesting in order to be fully autonomous. This SHM system has been initially built to perform damage assessment of aeronautic structures using well-known techniques like the Selective Lamb Mode Technique [9], Acoustic Emission Monitoring [10, 11], and Lamb waves interaction [12, 13]. Consequently, the energy harvesting technology
Experimental Investigations on a Novel Chemical Looping Combustion Configuration étude expérimentale d’une nouvelle configuration de combustion en boucle chimique
Yazdanpanah M.M.,Hoteit A.,Forret A.,Delebarre A.
Oil & Gas Science and Technology , 2011, DOI: 10.2516/ogst/2010025
Abstract: Chemical Looping Combustion (CLC) is a promising novel combustion technology involving inherent separation of carbon dioxide with minimum energy penalty. An oxygen carrier is employed to continuously transfer oxygen from the air reactor to the fuel reactor where the oxygen is delivered to the fuel. Consequently, direct contact between the air and fuel is prevented. The resulting flue gas is CO2-rich, without N2 dilution. The reduced oxygen carrier is then transported back to the air reactor for re-oxidation purposes, hence forming a chemical loop. Various CLC configurations have already been developed and tested on laboratory scales. However, more investigations are required to achieve feasible CLC processes. Among the different points to address, control of the solid circulation rate between the two reactors is of the highest importance regarding its effect on achievement of an appropriate oxygen transfer rate and solid oxidation degrees. Moreover, minimization of gas leakage between the fuel and air reactors is another important issue to be considered. A novel CLC configuration is proposed where reactions are carried out in two interconnected bubbling fluidized beds. Solid circulation rate control is achieved independently of gas flow rate in the reactors through use of pneumatic non-mechanical valves (L-valves). Moreover, loopseals are employed to minimize gas leakage while transferring solids. Experimental results from operation of a 10 kWth equivalent cold prototype are presented in this paper. The effect of operating variables on the solid circulation rate, gas leakage between the two beds and the pressure balance on all of the process elements is studied. The results demonstrate stable solid circulation with efficient control of the solid flow rate and effective gas tightness of the system. La combustion en boucle chimique (CLC) est une nouvelle technologie prometteuse qui implique la separation inherente du dioxyde de carbone avec une perte minimale d’energie. Un transporteur d’oxygene est utilise pour le transfert de l’oxygene en continu du “reacteur air” vers le “reacteur fioul” ou l’oxygene est apporte au combustible. Ainsi, le contact direct entre l’air et le combustible est evite. Le gaz resultant est riche en CO2 et n’est pas dilue avec de l’azote. Le transporteur d’oxygene reduit est ensuite transporte vers le reacteur air afin d’etre re-oxyde, formant ainsi une boucle chimique. Diverses configurations CLC ont deja ete developpees et testees a l’echelle laboratoire. Cependant, des travaux de recherche supplementaires sont necessaires pour
Dissociation between Performances in Water Maze and Spontaneous Alternation in BALB/C versus A/J Mice  [PDF]
Julien Celestine, Arnaud Tanti, Arnaud Aubert
Journal of Behavioral and Brain Science (JBBS) , 2012, DOI: 10.4236/jbbs.2012.22018
Abstract: Learning processes are extensively studied in behavioral neuroscience. As experimental models, Morris Water Maze (MWM) and Spontaneous Alternation (SA) represent two of the most frequently used laboratory tests to respectively address spatial vs non-spatial tasks. Several factors have been shown to impact on those learning, including strain, gender, apparatus, conditioning, vision, lighting conditions and stress level. In order to focus on the later, we compared the acquisition of two learning tasks (MWM and SA) in BALB/c and A/J mice, which are known as fearful and stress-sensitive strains. Here, we report that BALB/c mice exhibited higher performances than A/J mice in the MWM (i.e. spatial reference memory task), whereas A/J mice performed better in the SA (i.e. spatial working memory task). These results indicate dissociated processes in the acquisition of spatial vs non-spatial tasks, and emphasize a varying influence of emotional reactivity on different forms of cognition.
Criatividade, comunica??o e produ??o do saber
Sales, Arnaud;
Sociologias , 2008, DOI: 10.1590/S1517-45222008000100003
Abstract: knowledge production is a key element of the dynamics of contemporary societies that until now have been based on uneven levels of scientific and professional knowledge. the aim of this work is to understand, from a sociological point of view, the various aspects of the relationship between creativity, communication and knowledge production, starting from the following questions: what is the role of communication in the elaboration of discoveries or intellectual advances? what is the role of individuals and networks in these advances? and finally, what are the characteristics, especially the communicational ones, of the more creative institutions? the text is based on the works of philippe breton (communication and the status of knowledge), randal collins (network creativity), rogers hollingsworth (cognitive complexity, institutional diversity, quality of the research environment in terms of scientific exchange and discussion). these questions are not restricted to a strictly academic debate. they are also directly related to the practices of research environments, professors-researchers and students of master’s and doctor’s degree.
Um candomblé na Bélgica: tra?os etnográficos de tentativa de instala??o e suas dificuldades
Halloy, Arnaud;
Revista de Antropologia , 2004, DOI: 10.1590/S0034-77012004000200004
Abstract: in this article, i propose to go through some difficulties encountered in a setting up attempt of a candomblé (afro-brasilian cult) in belgium. my analysis will propose three main categories of problems: situations undermining the legitimation of the cult's chief and the respect of some ritual constraints; various "adaptation" attempts to human and material resources available; difficulties of learning some categories of knowledge that are not based on a linguistic formulation. to focus in this study on problematic situations does not aim to drow a chaotic picture of a "disrooted" cult but to account ethnographicaly for the dynamic and the multi-facial and builded characteristics of religious experience.
Les réseaux négociants de trois maisons huguenotes de Cadix, à la fin du xviiie siècle : des réseaux languedociens, protestants ou fran ais ?
Arnaud Bartolomei
Liame : Histoire et Histoire de l’Art des époques Moderne et Contemporaine de l’Europe Méditerranéenne et de ses Périphéries , 2012,
Abstract: Dans le dernier tiers du xviiie siècle, pour faire leur commerce, les négociants fran ais de Cadix – le port qui servait de tête de pont au commerce colonial espagnol – s’appuyaient sur deux types de réseaux marchands : d’une part, des correspondants résidant en Europe, qui leur fournissaient les biens manufacturés recherchés sur les marchés américains et qui recevaient, en échange, les piastres et autres denrées coloniales que les cargadores leur rapportaient en retour ; d’autre part, de...
Le multilinguisme, un atout pour le fran ais au Danemark
Arnaud Sgambato
Synergies Pays Scandinaves , 2011,
Abstract:
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