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Academic literature on the topic 'Photo-contrôle'
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Journal articles on the topic "Photo-contrôle"
Dalmolin, Quintino, John Alejandro Fierro Sanhueza, Edson Aparecido Mitishita, and Daniel Rodrigues Dos Santos. "Photogrammetric control points from airborne laser scanner." Revue Française de Photogrammétrie et de Télédétection, no. 198-199 (April 21, 2014): 39–45. http://dx.doi.org/10.52638/rfpt.2012.70.
Full textEttinger, Susanne, Marie Zeghdoudi, Nélida Manrique Llerena, Anne-Françoise Yao-Lafourcade, and Jean-Claude Thouret. "L'apport de l'imagerie à haute résolution spatiale à la cartographie du risque de crue torrentielle." Revue Française de Photogrammétrie et de Télédétection, no. 209 (September 5, 2014): 73–79. http://dx.doi.org/10.52638/rfpt.2015.129.
Full textPothin, Gaëlle, Hajer Bachouche, Christèle Camelis, and Ouidade Sabri. "Compréhension des pratiques des consommateurs face à la cherté de la vie." Recherche et Applications en Marketing (French Edition), December 10, 2021, 076737012110523. http://dx.doi.org/10.1177/07673701211052313.
Full textMOREAU, Clémence, André EVETTE, Marylise COTTET, Adeline FRANÇOIS, Anne RIVIÈRE-HONEGGER, Stéphanie VUKELIC, and Crescience LECAUDÉ. "Quels enjeux à relever pour accroître l’utilisation du génie végétal en territoire urbain ?" Sciences Eaux & Territoires, no. 43 (October 23, 2023). http://dx.doi.org/10.20870/revue-set.2023.43.7815.
Full textDissertations / Theses on the topic "Photo-contrôle"
Nguyen, Nhi Ha. "Synthèse de nano-déclencheurs photo-activables pour le contrôle spatio-temporel de la formation de NO." Thesis, Cachan, Ecole normale supérieure, 2015. http://www.theses.fr/2015DENS0020.
Full textNitric oxide (NO), whose biological role has been discovered in the late 20th century, is involved in the regulation of many processes in cell and organism. Its biosynthesis is carried out by enzymes named nitric oxide synthases (NOS) and involves NADPH binding to their reductase domain followed by a series of electron transfers to their oxygenase domain, where the formation of NO takes place by oxidation of L-arginine. Inspired by photoactivatable NADPH mimics called nano-triggers (NT), previously described in the literature, able to produce NO upon illumination, we designed and synthesized new generations of compounds potentially capable of initiating the catalytic activity of NOS under irradiation. They contain a recognition unit for NOS derived from adenosine and a diaminophenyl butadiene chromophoric moiety, linked together by a triazole group. These modular structures, easily assembled by "click" chemistry allowed the preparation of a library of nano-triggers, whose photophysical properties and stability under physiological conditions were evaluated. These new generations of compounds offer interesting perspectives for the control of biological processes by light
Corde, Joëlle. "Photo-croissance de nanoparticules d'argent dans des couches SiO2/TiO2 : contrôle des propriétés optiques et électriques." Palaiseau, Ecole polytechnique, 2012. http://www.theses.fr/2012EPXX0022.
Full textGoegan, Bastien. "Synthèse et application d’inducteurs de gènes photo-activables pour le contrôle in vivo de l’expression d’un gène." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF078/document.
Full textThe structural neural network’s is a fundamental process that ensures the proper functioning of the brain. To understand the formation and activity of these networks, we are developing a method which spatio-temporally controlled in vivo, the expression of targeted genes involved in this process at individual neuron cells scale by light. To achieve this in vivo tests, it is necessary to work with methods which are orthogonal to their cellular environment. Photochemical activation by photo-cleavage of an inert biological precursor offers a unique orthogonal way to attain this spatio-temporal control. Therefore, we have recently developed a new family of photoremovable group which are sensitive to two-photon (TP) excitation sensitive, in order to irradiate at favorable wave-lengths for in vivo applications. Moreover, to photo-regulate the expression of genes with high spatial and temporal resolution, we are combining the inducible gene expression system by tetracycline called « Tet-on » system to different photo-activable precursors of tetracycline analogs obtained by hemi-synthesis. All this, should allow us to get an effective system for the in vivo expression of a gene of interest by light excitation in order to photoactivate Kir2.1, a gene that cell autonomously silences the electrical activity of neurons in a subset of cells
Hamouri, Fatima. "Contrôle optique de l'activité de protéines et de l'expression de gènes, par photo-activation du cyclofène cagé, pour l’étude de l’initiation du cancer." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS235.
Full textThe zebrafish has become an increasingly popular and valuable cancer model over the past decades. While most of these models are generated by expressing mammalian oncogenes under tissue-specific promoters, here we describe a method that allows for the precise optical control of oncogene expression or inactivation in live zebrafish. Thus, this technique allows for the induction of tumor phenotypes by activating the constitutive expression of a typical human oncogene, KRASG12V, in selected tissues and single cells without tissue-specific promoters in live zebrafish. We also demonstrate the optical control of oncogene expression as KRASG12V, CMYC and BRAFV600E as well as the control of the expression and the activity of the CRISPR-Cas9 system. In addition, it should be noted that accurate manipulation of gene expression is essential to understand most biological processes. Therefore, our work presents a novel approach to initiate and study cancer in zebrafish. Finally, it is also worth noting that the high spatio-temporal resolution of this method makes it a valuable tool for studying cancer initiation from single cells
Gary, René. "Etude du contrôle optique de composants hyperfréquences en technologie guide d'onde coplanaire." Phd thesis, Grenoble INPG, 2006. http://tel.archives-ouvertes.fr/tel-00536087.
Full textBettahar, Houari. "High accurate 3-D photo-robotic nano-positioning for hybrid integrated optics." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD019/document.
Full textThe hybrid integration of individual photonic elements appears as promising, because it may provide high performances, propose new optical functionalities and products and exploit new propagation modes of light beams. This approach requires an accurate multi Degree-Of-Freedom (DOF) positioning of the individual photonic elements. Hence, the inaccurate multi-DOF measurement and robots control are the main locks to overcome, notably at the micro-scale. For this sake, an original photo-robotic approach has been proposed, relying on multi-DOF robot motion associated with the use of 1-D Fabry-Perot interferometry measure to realize multi-DOF pose measure. This approach notably integrates the issue of 6-DOF robot calibration that has been studied through extrinsic and/or intrinsic geometric parameters calibration. In order to find the appropriate calibration strategy for high positioning accuracy and adapted to the context of micro-positioning of optical components, a quantification and durability analysis of optical and robotic performances have been investigated. Experimental investigations demonstrate that a rotational and translational positioning accuracy of 0.004° and 27.6 nm have been obtained respectively.This photo-robotic approach has especially been applied to achieve the 6-DOF positioning of an optical lamella relative to an optical fiber with high accuracy that also conduct to maximum optical performances. The approach has also been applied to control the optical polarization states at the output of an hybrid optical system through achieving high accurate rotations of a specific optical wave plate around the optical axis. The experimental results notably demonstrate that the high positioning accuracy enables to accurately control of the optical polarization state
Narat, Pierre. "Contrôle et observation d'états d'une machine asynchrone associée à un convertisseur statique : application à un groupe moto-pompe alimentée par un générateur photo-voltai͏̈que." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT008H.
Full textYao, Min. "Computed radiography system modeling, simulation and optimization." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0128/document.
Full textFor over a century, film-based radiography has been used as a nondestructive testing technique for industrial inspections. With the advent of digital techniques in the medical domain, the NDT community is also considering alternative digital techniques. Computed Radiography (CR) is a cost-efficient and easy-to-implement replacement technique because it uses equipment very similar to film radiography. This technology uses flexible and reusable imaging plates (IP) as a detector to generate a latent image during x-ray exposure. With an optical scanning system, the latent image can be readout and digitized resulting in a direct digital image. CR is widely used in the medical field since it provides good performance at low energies. For industrial inspection, CR application is limited by its poor response to high energy radiation and the presence of scattering phenomena. To completely replace film radiography by such a system, its performance still needs to be improved by either finding more appropriate IPs or by optimizing operating conditions. Guidelines have been addressed in international standards to ensure a good image quality supplied by CR system, where metallic screens are recommended for the case of using high energy sources. However, the type and thickness of such a screen are not clearly defined and a large panel of possible configurations does exist. Simulation is a very useful tool to predict experimental outcomes and determine the optimal operating conditions. The Monte Carlo (MC) methods are widely accepted as the most accurate method to simulate radiation transport problems. It can give insight about physical phenomena, but due to its random nature, a large amount of computational time is required, especially for simulations involving complex geometries. Deterministic methods, on the other hand, can handle easily complex geometry, and are quite efficient. However, the estimation of scattering effects is more difficult with deterministic methods. In this thesis work, we have started with a Monte Carlo simulation study in order to investigate the physical phenomena involved in IP and in metallic screens at high energies. In particular we have studied separately the behavior of X-ray photons and electrons. Some experimental comparisons have been carried out at the European Synchrotron Radiation Facility. Then, we have proposed a hybrid simulation approach, combining the use of deterministic and Monte Carlo code, for simulating the imaging of complex shapes objects. This approach takes into account degradation introduced by X-ray scattering and fluorescence inside IP, as well as optical photons scattering during readout process. Different simulation configurations have been compared
Deo, Claire. "Ligands Photocommutables de Métaux de Transition pour le Contrôle Spatial et Temporel de la Réactivité Chimique." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN027/document.
Full textThe growing need to create sophisticated molecules and building blocks requires the development of increasingly more efficient synthetic tools. In this context, photoswitchable systems appear as an ideal means for controlling chemical reactivity with excellent spatial and temporal resolution. Organometallic complexes incorporating photochromic ligands represent a promising class of compounds for such applications as they combine both the versatile reactivity of the metal center with the photoswitchable properties of the ligand. This work investigates the use of azobenzenes as ligands for the synthesis of photoswitchable (η6-arene)ruthenium complexes. The study of the behavior of azobenzenes diversely substituted led to the synthesis of a new family of complexes bearing an o-sulfonamide ligand which photo-isomerization properties were investigated. The coordination of these complexes to phosphorus derivatives could be modulated upon irradiation and this property was applied to the light-triggered aza-Morita-Baylis-Hillman reaction.The second part of this work describes the synthesis and study of a new family of ketal-substituted bridged azobenzenes which display an uncommon three-species photo-isomerization pattern, triggering an interconversion between stable conformational diastereomers with a good selectivity. These compounds offer promising perspectives for conformational control by light
Franz, Sébastien. "Réalisations instrumentales pour le contrôle fonctionnel de l'infrastructure et des détecteurs de l'expérience ATLAS." Chambéry, 2009. http://www.theses.fr/2009CHAMS032.
Full textThe European Organization for Nuclear Research or CERN, Geneva, is about to operate the Large Hadron Collider (LHC). This accelerator ring and its particles detectors have been built to try to answer to the actual questions given by the particle physics theories. One of these detectors, ATLAS, has been designed, for instance, to validate, or invalidate, the theories on the existence of the Higgs Boson. The operation of the detector and the quality of its data depend on the quality of the detection elements but it depends also strongly on the good monitoring of its environment. In this respect, the developments presented in this document are focused on the control of the infrastructure of the ATLAS detector and on the ALFA detector (Absolute Luminosity For ATLAS) which is designed to provide an absolute measurement of the luminosity of the LHC beam at the ATLAS interaction point. Two projects which are integrated in the Detector Control System (DCS) are presented in the first part of the document: FPIAA (Finding Persons Inside ATLAS Areas) has been developed as a tool for people safety in the experimental cavern during the maintenance periods of ATLAS. It consists in an application for people localization and an active tracking of people in the cavern. A second application has been developed to measure the level of ionizing radiations and the particles fluency in the detector during its operation. These data will be used to evaluate the aging of the elements of the detector in respect with the level of integrated radiations. The work done on the ALFA detector is focused on particle detection technologies and control applications. The photo detection devices which will be used have been evaluated, the hardware of the trigger counter have been studied and optimized. Finally, preliminary developments on the DCS of the ALFA detector will be presented. Software components have been implemented to configure remotely the front-end electronics of the detector and to perform automated calibrations. A high level communication scheme has also been implemented for data exchange between the ALFA DCS and the system which controls the movements of the detector on the LHC beam