Dissertations / Theses on the topic 'Micro-doc'
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Hou, Yanxia. "Elaboration et caractérisation de biofilms pour micro- et nanobiocapteurs olfactifs." Ecully, Ecole centrale de Lyon, 2005. http://bibli.ec-lyon.fr/exl-doc/yhou.pdf.
Full textThe objective of this work is to elaborate and characterize biofilms of odorant-binding proteins and olfactory receptors on electrodes for construction of olfactory micro- and nanobiosensors. Mixed Langmuir-Blodgett (LB) films of IgG/amphiphile and the corresponding immunosensor were first studied in order to validate the immobilization technique of Langmuir-Blodgett. Then, LB technique was applied to construct odorant biosensor based on mixed odorant-binding proteins/amphiphile LB films which were characterized by AFM and electrochemical impedance spectroscopy (EIS). However, we found that LB technique is not suitable for immobilization of G-protein coupled receptors on the electrode. Therefore, a novel immobilization technique of self-assembled multilayer was developed and characterized by electrochemical impedance spectroscopy and AFM. It was demonstrated that rhodopsin and olfactory receptors I7 can
Malak, Saly. "Optical localization of multiple micro-conveyors mobile over smart surfaces." Thesis, Compiègne, 2019. http://bibliotheque.utc.fr/EXPLOITATION/doc/IFD/2019COMP2526.
Full textThis thesis aims to develop a method for optical localization and tracking of microconveyors moving over a surface in the context of micro-robotics. The principle of the proposed localization method consists of detecting a beam that is reflected on the micro-conveyor and analyzing this optical received signal to obtain the corresponding positions. The main elements of the system are a corner cube reflector, a MEMS mirror and a beam splitter. The corner cube is placed on the micro-conveyor in order to allow the optical signal to be reflected in its incident direction. The MEMS mirror allows the surface to be scanned with the laser. As for the beam splitter, it is an optical component used to guide the reflected light to a photodetector which is in turn used for localization and tracking through the exploitation of the signal that it detects. The important role of localization is to optimize the trajectory followed by the micro-conveyors. This could be achieved by controlling the respective position and speed of each of them in order to be finally able to localize the micro-conveyor with high precision and to avoid possible collisions between them. The surface used is a micro-conveying surface based on an electromagnetic principle, developed at the Roberval laboratory. The surface is used to perform experimental tests and to evaluate the developed sensor. A system calibration, using homography, was carried out in order to ensure the localization and tracking of the micro-conveyor, and then to control its trajectory and speed. Simultaneous localization and tracking of two micro-conveyors using time division multiplexing was also developed and validated in this work. An application of the thesis at the macroscopic scale is presented as well through applying free space optical communication between two mobile systems controlled by closed-loop optical tracking. Each system includes an active transmitter and a receiver (instead of a passive corner cube reflector in the case of the micro-conveyor). The system is driven by two servomotors which permit it to have free movement in three-dimensional space. The two modules must be aligned in order to be able to send and receive information by laser and thus communicate. In this case, a high-precision tracking system which is capable of aligning the two moving modules is required
Hou, Yanxia Jaffrezic-Renault Nicole. "Elaboration et caractérisation de biofilms pour micro- et nanobiocapteurs olfactifs." [S.l.] : [s.n.], 2005. http://bibli.ec-lyon.fr/exl-doc/yhou.pdf.
Full textBlanchard, Michel. "Myopie et horizons temporels des économies de marché : Une approche micro-économique." Paris 9, 1997. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1997PA090001.
Full textTraditionally, two distinct approaches deal with economic horizons of projects and behaviours. First, debates about time preferences and the specific ability of some agents to take into account longer time spans have led to the study of individual economic horizons. More recently, temporal investment biases involved in financial issues were examined. These biases stem from conflicts of interest between managers and financiers under asymmetric information. This dissertation merges both approaches focusing on short-termism and myopic behaviour of firms. In particular, it is shown those others forms of myopic biases can occur and those self-enforcing short termists equilibrias may appear
Meziani, Rachid. "Méthodes interactives en optimisation linéaire sur micro-ordinateur : conception, réalisation et application." Paris 9, 1987. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1987PA090030.
Full textTORRERO, Alessandra Mundy. "Otimização das condições de dissolução parcial de sedimentos em sistema fechado assistida por micro-ondas." reponame:Repositório Institucional da CPRM, 2017. http://rigeo.cprm.gov.br/xmlui/handle/doc/17644.
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Marrakchi, Mouna. "Développement et optimisation de biocapteurs à base de biomolécules et de micro-organismes sur microélectrodes interdigitées." Ecully, Ecole centrale de Lyon, 2006. http://bibli.ec-lyon.fr/exl-doc/mmarrakchi.pdf.
Full textNowadays, the needs in biosensors has proven to be real and relevant in several fields such as the environment, health,. . . To meet those needs and expectations, we focused in this thesis on the design of different biosensors based on enzyme and/or micro-organisms immobilized on conductometric electrodes. The first part of this study is dedicated to the use of proteinase K based biosensor to estimate and control organic pollution in river's waters through protein titration. The next part describes the development of a biosensor mixing two distinct enzymatic activities, the beta-galactosidase and the glucose oxidase, and its application to lactose determination in milk. The efficiency of the conductometric biosensor in lactose analysis, as a result of combination of lactose enzymatic hydrolysis (though beta-galactosidase) and glucose oxidation(catalyzed by glucose oxidase), were afterwards applied to selenite determination (toxic element if used in important quantities). This was realized by using Herminiimonas arsenicoxydans bacterial cells where the beta-galactosidase activity is induced by selenite. Thus, an original conductometric biosensor has been developed, based on the combination of glucose oxidase activity and genetically modified bacteria, which produced abeta-galactosidase activity in presence of selenite. Finally, an olfactory biosensor based on the immobilization of a genetically modified Saccharomyces Cerevisiæ yeast, expressing the human olfactory receptor OR17-40, has been successfully developed and applied to helional detection
Davidovici, Myriam. "Evolution de la déréglementation dans l'industrie gazière britannique : approche micro-économique en termes de dynamique d'apprentissage institutionnel." Paris 9, 1997. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1997PA090048.
Full textThe study of the deregulation of the british gas industry led us to introduce the concept of institutional dynamics in order to understand the evolution of the regulatory framework together with the development of competition. The modelling of the institutional dynamics using a model based on system dynamics theory enables to analyze the process of deregulation, I. E. The transition from the regulation of a monopoly to the regulation of competition. This research enables in particular: to articulate the microeconomic behaviours of economic, regulatory and political actors and to reconstruct the macroeconomic evolution of market shares; to suggest a new way of modelling competition in terms of entry and exit flows of firms; to consider the learning of the gas regulator and its lag to adjust the regulation as part of the institutional dynamics; to endogeneize the evolutions of the legal framework
Essendoubi, Mohammed. "Identification et typage par (micro) spectroscopie IRTF des levures du genre Candida d'origine clinique." Reims, 2007. http://theses.univ-reims.fr/exl-doc/GED00000629.pdf.
Full textThe@use of FTIR (micro)spectroscopy for the differentiation and identification of Candida yeasts of clinical origin has been evaluated. Ninety-six strains belonging to six different species have been tested for the differentiation process while strains from three species (C. Albicans, C. Glabrata, and C. Parapsilosis) have been used for the typing tests. Our results show that species differentiation isachievable by analysing both suspensions and microcolonies. A spectral data base consisting of 180 strains from six different Candida species frequently encountered in medical practice has been set up. The data base was then tested with unknown species from patients. An identification score of 100% was achieved for four of the species. The lower score obtained for the other two species was explainedby the lack of representative spectra belonging to these strains in the initial data base. To demonstrate the feasibility of the method for strain typing, two clinical studies were conducted. The first study reports on to the longitudinal follow-up of C. Glabrata strains in an intensive care patient and the second concerns an epidemiological study where 13 C. Glabrata strains isolated from four differentpatients were investigated. In both cases, the FTIR results excluded an inter-human transmission. This was further confirmed by RAPD technique. These results confirm the potentials of (micro)FTIR spectroscopy to discriminate Candida strains both at species and strain levels. Besides its high information content, FTIR spectroscopy is a rapid, reliable, and low-cost technique and can be foreseen as a new diagnostic approach in medical mycology
Essendoubi, Mohammed Sockalingum Dhruvananda Ganesh. "Identification et typage par (micro) spectroscopie IRTF des levures du genre Candida d'origine clinique." S.n. : S.l, 2007. http://scdurca.univ-reims.fr/exl-doc/GED00000629.pdf.
Full textBenilov, Arthur. "Nouveaux procédés de l'élaboration et de mise en oeuvre de capteurs et microsystèmes en silicium et silicium poreux par des méthodes luminescentes et électriques." Ecully, Ecole centrale de Lyon, 2007. http://bibli.ec-lyon.fr/exl-doc/abenilov.pdf.
Full textThis thesis deals with various aspects of porous silicon that includes the questions of fabrication, modification, measurement and application in sensor devices. The goal is to continue to explore the potetial of porous silicon as sensing system, trying to find stabilizing conditions of preparation and usage. The photoluminescent properties of porous silicon, using time-resolved spectrometry, are considered. This study is important to clarify the mechanisms of porous silocon photoluminescence quenching and degradation at absorbance of certain substances. The influence of pH level of surrounding environment on photoluminescence intensity and decay time of porous silicon layers are studied. It is found that photoluminescence intensity and decay time is decreased in basic solutions and is increased in acidic solutions, which can be explained by hydrogen effusion and restoration processes. We have tried to stabilize the surface of porous Si with a PEDOT polymer coating with a partial sucess. The methodic incorpration of catalytic metals (Ag, Pt, Ni) into porous Si layers is also studied as an opprtunity to create silicon matrices with metallic nanoclusters in pores for sensor applications. The electrical properties of porous Si are studied at absorbance of certain gases (Ar, N2, Co2 and O2) by DLTS spectrometry. The contactless measurement method bases on eddy current is proposed to monitor the conductivity changes of porous Si in presence of No2. The localized formation of porous silicon by light-assited etching is also studied. It is shown that the spatial resolution of this method is limited by the diffusion lengh of minor carriers. Lastly an exploratory work on the micro electro-discharge machining uEDM) of silicon is performed. An EDM apparatus has been designed to perform the machinig of silicon at the scale of 5-100 um. Perspectives to improve this resolution are discussed. The formatio of porous silicon by spark-erosion, integrated into the EDM process, is demonstrated
Benzarti, Yousra. "La distribution du crédit dans les pays émergents : Fondements micro économiques et estimations empiriques sur le marché tunisien." Paris 9, 2009. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2009PA090004.
Full textBouchikhi, Hamid. "Eléments d'une approche constructiviste des structures organisationnelles : cas de la structuration d'un champ micro-informatique à la RATP." Paris 9, 1988. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1988PA090034.
Full textIn the recent years, the constructivist approaches have been widely adopted in numerous fields of social sciences : epistemology, cognitive psychology and sociology. This has not been the case as far as the management science field is concerned - except of some isolated trials. This observation is easily confirmed by the lasting domination of the mechanism and organism models among the works of organizational theorists. The thesis - a result of a more than two years field research in a large organisation - contains a critical discussion of works representative of the mechanism and organism models. It also tries to bring a contribution to the building of a constructivist perspective in the study of organizations. The main ideas of Jean Piaget and Anthony Giddens - two famous representatives of the constructivist paradigm - are presented and used together to state the elements of a constructivist model of organizations. The explaining capability of the constructivist perspective is shown through the analysis of the structuring process of a micro-computing field in the RATP. Different stages of structuring are clearly identified. The factors contributing to the structuring at each stage are analysed as well as the relationship between successive stages
Simion, Paul. "Les modalités de génèse des stratégies d'entreprise : le postulat géographique : cas d'entreprises guadeloupéennes, martiniquaises et réunionnaises dans le contexte d'un micro-état." Paris 9, 2011. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2011PA090014.
Full textLapeyrade, Mickael. "Utilisation des plasmas micro-ondes RCE pour préparer des films minces de nitrure de silicium : Application à la passivation des matériaux GaInAs et AlInAs." Ecully, Ecole centrale de Lyon, 1999. http://bibli.ec-lyon.fr/exl-doc/TH_T1801_mlapeyrade.pdf.
Full textIn this work, we present the possibilities of a low power (< 250W) compact ECR (Electron Cyclotron Resonance) source to produce, at low deposition temperature (< 300°C), high quality SiNx films compatible with III-V semiconductor devices. Nitrogen plasma and pure silane have been used as gas precursors. We have studied the effect of varying the main process parameters on the composition and properties of the films. The deposited films have been characterized in-situ by X-ray Photoelectron Spectroscopy (XPS) and Spectroellipsometry and ex-situ by FTIR, Nuclear Reaction Analysis (NRA) and Energy Recoil Detection Analysis (ERDA), and finally I-V and C-V measurements. Each parameter has an optimal range of values or a threshold value necessary to obtain films with high dielectric quality. For a deposition temperature of 300°C, the best films exhibit a resistivity of 1015 Q. Cm and a breakdown voltage of 3 MV. Cm-1. The physicochemical properties of the films are close to those of stoichiometric silicon nitride. Strong correlations have been observed between the physicochemical and the electrical properties of the films, over the entire range of process parameters. A passivation process, based on surface treatments, oxide removal in solution, plasma nitridation and SiNx ECR plasma deposition, has been developed. The chemical and electrical properties of SiNx/AlInAs, SiNx/GaInAs and SiNx/InP interfaces have been investigated. Clean optimized surfaces appeared critical to achieve, mainly due to the existence of residual oxides and elemental arsenic at the interface, which is known to generate interface states. We have investigated the nitridation of non contaminated surfaces (i. E. Freshly grown by MBE without any contact with the atmosphere) and evaluated the materials and plasma process limitations. HEMT devices and InGaAlAs/InP based photodiodes have been successfully passivated using the previously defined passivation process
Ramos-Tallada, Julio. "Les risques de bilan bancaires dans le canal étroit du crédit : micro-fondements de la transmission de la politique monétaire et illustration par le comportement des banques au Brésil." Paris 9, 2010. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2010PA090040.
Full textLa capacité de la politique monétaire à provoquer des déplacements de l’offre de prêts bancaires est la condition la plus controversée de la transmission via le canal étroit. Cette thèse analyse comment la gestion des principaux risques de bilan affecte les choix des banques confrontées à un choc monétaire. Le courant dominant avance une logique de précaution : la transmission est amplifiée par des contraintes de liquidité, résultant des frictions sur les marchés de capitaux. Or, nous montrons que certaines imperfections tendent à atténuer la réponse des banques à un choc aléatoire sur leur base de dépôts. Nous proposons ensuite une approche basée sur l’optimisation conjointe des risques de crédit, de marché et de taux d’intérêt. Ce motif de diversification gouverne la réponse des banques aux impulsions monétaires même lorsque leur risque de liquidité est faible. Le cas du Brésil en est une bonne illustration. Les crises monétaires passées ont façonné les structures financières : les banques émettent une ample gamme de substituts de la monnaie et détiennent une proportion élevée de titres/crédit. Dans ce cas de figure, nos résultats suggèrent qu’une réduction de la volatilité des taux courts et un allongement des maturités des titres peuvent améliorer l’efficacité de la transmission
Lang, Ian William, and n/a. "Conditional Truths: Remapping Paths To Documentary 'Independence'." Griffith University. Queensland College of Art, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20031112.105737.
Full textLang, Ian William. "Conditional Truths: Remapping Paths To Documentary 'Independence'." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367923.
Full textThesis (PhD Doctorate)
Doctor of Philosophy by Publication (PhD)
Queensland College of Art
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