Tesis sobre el tema "Nouvelle radio"
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Touré, Kitia. "La nouvelle radiophonique en langue française". Paris 4, 1985. http://www.theses.fr/1985PA040032.
Texto completoCarrère, Guy. "Radiodiffusion numérique sonore par satellite : une nouvelle approche /". Paris : Ecole nationale supérieure des télécommunications, 1994. http://catalogue.bnf.fr/ark:/12148/cb35707864d.
Texto completoHellbourg, Grégory. "Traitement spatial des interférences pour les radiotélescopes de nouvelle génération". Phd thesis, Université d'Orléans, 2014. http://tel.archives-ouvertes.fr/tel-01069394.
Texto completoPaul, Nicolas. "Une nouvelle approche pour l'Estimation des Mélanges de Lois : application à la radio cognitive". Paris, CNAM, 2008. http://www.theses.fr/2008CNAM0592.
Texto completoThis thesis deals with unsupervised mixture estimation. The number K of components is supposed to be known and the mixture components do not strongly overlap, so that the component modes remain modes of the mixture probability density function. Our approach is based on an original optimisation criterion, called “K-product”. The global optimisation of KP is easier than the global optimisation of the classical criteria, usually derived from the log-likelihood. In dimension 1 or 2, the global minimum of KP can be reached by first solving a system of K linear equations then finding the roots of some polynomial of order K. In higher dimension, a relaxation algorithm can be used, where each step simply consists of a weighted least square optimization. The global minimum of KP provides a biased but useful estimation of the component expectations: If the components do not strongly overlap, a simple nearest neighbour classification, based on the KP minimum, enable to separate the different components. An original application has been proposed in a cognitive radio context, where the KP criterion is used by a set of “secondary users” to estimate the different mode of activity of a set of “primary users” in a given radio spectrum band
Elfalaki, Elhoussein. "Les Publics de la radio et de la télévision dans une vile nouvelle au Maroc (Kenitra)". Lille : ANRT, 1985. http://catalogue.bnf.fr/ark:/12148/cb37594177w.
Texto completoDrouet, Michel. "Nouvelle approche expérimentale du traitement de l'aplasie médullaire radio-induite par expansion ex vivo des progéniteurs hématopoiétiques CD34+ : bénéfice potentiel de la modulation de l'apoptose radio-induite". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10143.
Texto completoHaddad, Ahmed. "GeRoFan : une architecture et un plan de contrôle basés sur la radio-sur-fibre pour la mutualisation des réseaux d'accès mobile de nouvelle génération". Thesis, Paris, ENST, 2013. http://www.theses.fr/2013ENST0025/document.
Texto completoCurrent radio access networks architectures are not suited in terms of capacity and backhauling capabilities to fit the continuing traffic increase of 4G cellular systems. The objective of the thesis is to propose an innovative and generic mobile backhauling network architecture, called GeRoFAN (Generic Radio-over-Fiber Access Network), for next generation mobile systems (WiMAX, 4G LTE). Two major technological innovations are used to implement GeRo-FAN: analog Radio-over-Fiber (RoF) and reflective amplified absorption modulators. The aim of this thesis is to design for such an architecture an original Control Plane (CP) and a signaling channel enabling to balance radio resources between a set of neighboring cells at the access/metropolitan scale according to traffic fluctuations. The transmission of several radio frequencies by means of an analog RoF link suffers from several impairments that may degrade the capacity of the radio system. The originality of the GeRoFAN-CP consists in mapping radio frequencies with optical carriers by means of Sub-Carrier Multiplexing (SCM) in order to optimize the Shannon’s capacity within the various cells covered by the system according to the current traffic load. For that purpose, a deep analysis and modeling of the various physical layer impairments impacting the quality of the radio signal is carried out. Unlike comparable approaches, the GeRoFAN-CP is as independent as possible from the radio layer protocols. Thus, the "radio MAC-agnostic" nature of the GeRoFAN-CP enables to federate multiple operators using different radio technologies onto the same backhauling optical infrastructure. Subcarrier and wavelength division multiplexing (SCM/WDM) as well as WDM optical routing capabilities are exploited onto the GeRoFAN transparent architecture. More globally, the GeRoFAN-CP enables a form of "radio frequency virtualization" while promoting new business models for Telecom service providers. The last part of the thesis focuses on the business value of the GeRoFAN paradigm. The expectations of the different stake-holders and main regulatory/organizational entities that could be involved in the deployment of GeRoFAN infrastructures should be addressed in order to achieve a smooth deployment of this new type of mobile backhauling. Economics of the GeRoFAN architecture are investigated in terms of OpEx/CapEx valuation and investment profitability, especially in reference to digitized RoF. Two business models are then proposed to study how GeRoFAN contributes to enriching the cellular backhauling service value chain
Bastos, Henri. "Une nouvelle stratégie pour l'étude des stades de différenciation des cellules germinales mâles : application au risque génétique radio-induit". Paris 11, 2004. http://www.theses.fr/2004PA11T067.
Texto completoHaddad, Ahmed. "GeRoFan : une architecture et un plan de contrôle basés sur la radio-sur-fibre pour la mutualisation des réseaux d'accès mobile de nouvelle génération". Electronic Thesis or Diss., Paris, ENST, 2013. http://www.theses.fr/2013ENST0025.
Texto completoCurrent radio access networks architectures are not suited in terms of capacity and backhauling capabilities to fit the continuing traffic increase of 4G cellular systems. The objective of the thesis is to propose an innovative and generic mobile backhauling network architecture, called GeRoFAN (Generic Radio-over-Fiber Access Network), for next generation mobile systems (WiMAX, 4G LTE). Two major technological innovations are used to implement GeRo-FAN: analog Radio-over-Fiber (RoF) and reflective amplified absorption modulators. The aim of this thesis is to design for such an architecture an original Control Plane (CP) and a signaling channel enabling to balance radio resources between a set of neighboring cells at the access/metropolitan scale according to traffic fluctuations. The transmission of several radio frequencies by means of an analog RoF link suffers from several impairments that may degrade the capacity of the radio system. The originality of the GeRoFAN-CP consists in mapping radio frequencies with optical carriers by means of Sub-Carrier Multiplexing (SCM) in order to optimize the Shannon’s capacity within the various cells covered by the system according to the current traffic load. For that purpose, a deep analysis and modeling of the various physical layer impairments impacting the quality of the radio signal is carried out. Unlike comparable approaches, the GeRoFAN-CP is as independent as possible from the radio layer protocols. Thus, the "radio MAC-agnostic" nature of the GeRoFAN-CP enables to federate multiple operators using different radio technologies onto the same backhauling optical infrastructure. Subcarrier and wavelength division multiplexing (SCM/WDM) as well as WDM optical routing capabilities are exploited onto the GeRoFAN transparent architecture. More globally, the GeRoFAN-CP enables a form of "radio frequency virtualization" while promoting new business models for Telecom service providers. The last part of the thesis focuses on the business value of the GeRoFAN paradigm. The expectations of the different stake-holders and main regulatory/organizational entities that could be involved in the deployment of GeRoFAN infrastructures should be addressed in order to achieve a smooth deployment of this new type of mobile backhauling. Economics of the GeRoFAN architecture are investigated in terms of OpEx/CapEx valuation and investment profitability, especially in reference to digitized RoF. Two business models are then proposed to study how GeRoFAN contributes to enriching the cellular backhauling service value chain
Juompan-Yakam, Bertrand. "Métrologie des comparaisons d'horloges par satellites : contributions à l'étude d'un complément au système de radionavigation GPS et à la prédiction du temps du GPS : proposition pour une nouvelle méthode de synchronisation d'horloges en temps réel". Observatoire de Paris, 1994. https://hal.science/tel-02095274.
Texto completoThe Global Positioning System is a valuable tool in navigation, geodesy and time metrology. Operational time transfer can be performed over very long baselines at the nanosecond level. In civil aviation though, aprt from intentional degradation, outages and lack of integrity are the main shortcomings of GPS. The project of a complement to GPS consist of generating on board a geostationary stellite, through servo-control from the earth, GPS-like signals and a time scale synchronized in GPS time. The goal is to enable GPS to be ratified as a stand-alone en route navigation means, thanks to a space segment augmentation and the monitoring mission of the complement. The European Complement to GPS experiment confirms the feasibility of the project. Alternative methods for GPS time restitution are studied, with different SA models. An original method for real time clock synchronization, without data transfer, is also proposed. This possibility, combined with GPS time prediction, would be of great interest for a Wide Area Differential Global Positioning System
Ibrahimi, Khalil. "Gestion des ressources des réseaux mobiles de nouvelle génération par rapport à la mobilité des utilisateurs". Phd thesis, Université d'Avignon, 2009. http://tel.archives-ouvertes.fr/tel-00453644.
Texto completoPetit, Ferrufino Juan Mauricio. "Dual Electroabsorption Modulated Laser: étude et caractérisation d'une nouvelle source optique laser-modulateur intégrés pour les transmissions numériques haut-débit et les applications Radio-sur-Fibre". Phd thesis, Télécom ParisTech, 2010. http://pastel.archives-ouvertes.fr/pastel-00579997.
Texto completoPetit-Ferrufino, Juan. ""Dual electroabsorption modulated laser" : étude et caractérisation d'une nouvelle source optique laser-modulateur intégrés pour les transmissions numériques à haut débit et les applications radio-sur-fibre". Paris, Télécom ParisTech, 2010. https://pastel.hal.science/pastel-00579997.
Texto completoThis thesis is related to the physical layer of a terrestrial optical transmission system for a metropolitan network. Our first investigation deals with an optical device, the Electroabsorption Modulated Laser (EML) which is used to constitute the optical source of medium span optical link thanks to its low price, low consumption and small foot print. The work is done in collaboration with an industrial optoelectronics maker, the GIE Alcatel-Thales III-V Lab, We propose an original technique of pre-chirping obtained by modulating the laser in addition to the electro-absorption modulator (MEA). The purpose of this thesis is to develop a novel modulation scheme of the EML in order to overcome the limits set by the chromatic dispersion and nonlinear effects in the transmission fibre. The principle has been demonstrated in the literature with a separate laser and a modulator but never with an integrated device. The technique is based on a pre-compensation of the chromatic dispersion by applying a modulation to the laser of the EML and then the signal is modulated by the MEA. Within the scope of this research work, we have demonstrated experimentally the first increment of the usual distances from around 80 km upto 160 km with a monolithic component and no dispersion compensating element. Radio-over-Fiber application for optical access networks has also been explored, it is also based on an analogue dual modulation, this time tuned so as supress one modulation sideband. This modulation format can carry very high-speed IQ signals over 100 km excluding the periodic degradation of the data signal induced by chromatic dispersion obtained with double-sideband modulation
Bekkar, Mohammed. "Formation de voies hybride analogique-numérique pour la réduction d'interférences dans les réseaux cellulaires de nouvelle génération". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT007.
Texto completoBeamforming is a signal processing method used in antenna arrays, allowing to enhance directions of emission or reception of signals by controlling the different elements.In mobile networks especially, it allows interference reduction in base stations.Its full digital impementation is limited by energy consumption and cost when increasing the number of antennas.As a response, hybrid analog-digital implementation could be used to reduce the number of radiofrequency (RF) chains as well as the number of analog-to-digital converters.In this implementation, the analog stage could be realised using different types of devices (phase shifters, amlifiers/attenuators, variable impedances) and with a variable connectivity to the antenna array.Nevertheless, if we want to keep a simple RF circuitry by using phase shifters only to tune the analog beamformer, the problem of optimising these weights becomes non-convex.The current works on small cell networks show that the interference between base station is one of the limiting factors of the coverage and the datarate.Furthermore, in a full digital implementation, the presence of strong blockers leads to analog-to-digital converters saturation or desensitization.The purpose of this work is the study of hybrid beamforming with phase-only implementation, as well as to propose an algorithm to compute the beamforming matrices, to reduce the received interference in a small cell.After a description and a state-of-the-art, we preliminarily proposed an interference characterization using an algebraic angle between the signals of interest vectors and the interference vectors, which allowed us to obtain a lower bound on the SINR performance of the optimal beamformer.We have then proposed a sub-optimal solution of hybrid phase-only beamforming, which when using an infinite resolution digitization, has a low loss as compared to a solution using modulus and phase.Secondly, we introduced an analog-to-digital converter model, which allowed us to bring out the limitations of the first appproach as well as of the full digital implementation, in the presence of strong blockers.Afterwards, we proposed an optimisation algorithm of the analog stage, based on a semidefinite relaxation.The peroformance of this algorithm, in terms of SINR and sumrate are close to the benchmark with full degree of freedom, modulus and phase.In comparison, the performance state-of-the-art tested solutions using non-convex cost function are lower and depend on initialization point
Mishra, Debashisha. "Exploiting the synergies of unmanned aerial vehicles (UAVs) and 5G network". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0058.
Texto completoAs an expanding subject of aerial robotics, Unmanned Aerial Vehicles (UAVs) have received substantial research attention within the wireless networking research community. As soon as national legislations enable UAVs to fly autonomously, we will witness swarms of UAV filling the skies of our smart cities to complete diverse missions: package delivery, infrastructure monitoring, event videography, surveillance, tracking, etc. Fifth generation (5G) and beyond cellular networks can improve UAV communications in a variety of ways and thus benefit the UAV ecosystem. There is a wide variety of wireless applications and use cases that can benefit from the capabilities of these smart devices, including the UAV's inherent characteristics of agile mobility in three-dimensional space, autonomous operation, and intelligent placement. The broad goal of this thesis is to provide a comprehensive analysis of the synergies that may be realized when combining 5G and beyond cellular networks with UAV technology. This thesis presents four types of UAV and cellular ecosystem integration models. "UAV-assisted cellular paradigm" refers to communication scenarios in which UAVs are used as flying (or aerial) base stations or as relays to augment current terrestrial cellular connectivity or to mitigate disaster situations. The "cellular-assisted UAV paradigm" foresees the integration of UAVs into the current cellular network as a new aerial user (flying UE) to serve a wide variety of applications and use cases. The "UAV-to-UAV paradigm" stresses the collective strength of a fleet of UAVs as a swarm and communication amongst UAVs inside the swarm. The "hybrid non-terrestrial paradigm" encompasses satellite and aerial networks, therefore examining the whole spectrum of communication links from the ground to the air to the space in the form of an integrated space-air-ground communication network. Initially, this thesis focuses on aerial base stations, which have gained great academic attention in order to provide flexible, on-demand communication services to ground users. On this occasion, we build and construct a proof-of-concept prototype platform that delineates the design components required to implement such platforms in the real world, and we then explain the necessity for optimal placement of aerial base stations for increasing communication services. To support a heterogeneous class of 5G services from various vertical industries (referred to as tenants of 5G network operators), we propose a slicing-aware aerial base station framework in which ground users with differentiated traffic requirements in terms of data rate, latency, and massive deployment are supported through intelligent resource provisioning. Second, we describe aerial users who are supported by current cellular infrastructure and examine difficulties such as coexistence of aerial users and ground users, handovers, and communication-aware trajectory optimization. The use of a swarm of UAVs is considerably more cost-effective as compared to a single UAV conducting a mission when considering realistic mission goals. A swarm of UAVs opens up new opportunities for new services and applications since the UAVs may independently coordinate their operations and work together to complete a given task. Due to the spatio-temporal dynamics of swarm topology, dependable network development with seamless communication amongst UAVs is essential for any operation to be successful. As part of this thesis, we offer centralized and decentralized network models for UAV-to-UAV (U2U) communication inside swarm and conduct a full investigation of sidelink-assisted U2U communication with performance assessment
Kyllonen, Jaakko. "Design of frequency agile filter and mmWave antenna for 5G mobile devices". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0117.
Texto completoMobile communications are in constant race to meet the demands of the users, especially in the terms of the amount of data they want to use. The introduction of the 5G NR (New Radio) will exceed the current limits but it needs technological breakthroughs to achieve its goals. To achieve the promises of the new 5G NR communication standard the electronics industry is interested in to develop new key components for tomorrow. The objective of this thesis work has been to design two key components to respond to the different future developments of the mobile devices. Therefore a frequency agile filter for frequencies below 6 GHz and a low cost antenna array around 28 GHz for 5G NR have been designed, manufactured and tested
Poulain, Sebastien. "Les radios alternatives : l'exemple de Radio Ici et Maintenant". Thesis, Bordeaux 3, 2015. http://www.theses.fr/2015BOR30020/document.
Texto completoIn this thesis, we wonder how countercultural movement found new places of expression through the increased accessibility of audiovisual, thanks to "free radio" fight. Specifically, we want to know why and how society and the French media have enabled the establishment of an alternative media like Radio Ici et Maintenant (RIM) and how this radio has found a viable business model to spread its ideology. We shall see that the existence and persistence of RIM is due to the combination of two factors: firstly the reduction in the cost of entry into the radio broadcasting through the development and struggle of "free radio" that gave birth to associative radios (with their specific legal and economic model) and also the decrease in the cost of entering the religious market with the development of the French New Age counterculture issue of the American counterculture, itself the result of religious thoughts Western alternatives (related to the esoteric, the mediumship) and Eastern religions (Hinduism and Buddhism). Thus, the specific legal and economic model of associative radios allowed to live and persist "radiolibriste" and New Age ideology within RIM. But add that this model would not have been possible if it had not been worn by volunteer facilitators, invited activists and active listeners which we analyze the sociological profile. The scientific interest of this subject is the fact that it is mainly to study RIM which is an old "free radio". She was one of the most important radio stations in the movement. It is the oldest Parisian private local radio station. Today, it is a community radio (category A). This category corresponds to a large number of radio stations (about 600), but these are little studied. Finally, this is a New Age radio and one of the only French audiovisual media New Age. Crossing history and sociology of religion, media, communication, politics, science, this thesis is based on a constant listening, on numerous interviews and informal discussions on the study of different archives (paper, audio, digital) and numerous ethnographic observations. We give in the first part scientific tools to analyze this phenomenon. We will then see in which historical, radio, economic, social, legal and political context RIM appeared and continues to exist today. Finally, we focus on the proposed radio model and the actors of this radio
Dumas, Dylan. "Nouvelles techniques de traitement du signal en radio-océanographie". Electronic Thesis or Diss., Toulon, 2022. http://www.theses.fr/2022TOUL0008.
Texto completoThe measurement of sea surface currents by HF radar raises several issues in terms of radar calibration, spatial resolution and parasite signals. Conventional azimuth scanning processing called beam forming has limited angular resolution for most phased array radar and high angular resolution processing methods called direction finding generally produce lacunary maps. In this thesis we propose : a) a high angular resolution processing technique based on direction finding algorithm allowing to obtain full and low-noise maps ; b) an automatic antenna calibration method ; c) other methods to removing artifacts related to radio frequency interference and clutter echoes. These methods, initially planned for phased array radars, have been adapted to compact radars called CODAR where the main difficulty is the calibration due to the nature of the antennas. The measurements obtained with these new techniques have been validated with in situ campaigns with errors in the low range of the scientific literature
NOMBLOT, CHRISTOPHE. "Radio-anatomie du pelvis feminin : impact des nouvelles techniques d'imagerie". Toulouse 3, 1989. http://www.theses.fr/1989TOU31532.
Texto completoZanatta, Filho Danilo. "Nouvelles méthodes de traitement d'antenne en émission alliant diversité et formation de voie". Paris, CNAM, 2006. http://www.theses.fr/2006CNAM0540.
Texto completoThis work deals with the use of an antenna array at the base station of a mobile communication system for transmission We search for techniques to combine diversity and beanforming to better exploit the antenna array. In this context, we propose propose a transmit scheme composed of a precoder acting as an interface between the transmit diversity and the antenna array. We propose two approaches to obtain this precoder, one based on the minimization of the variance of the received power at the mobile, and the other directly based on the minimization of the error rate. We also consider the multi-user case, for which we propose the joint adaptation of the precoders to minimize the total transmit power, while satisfying the users' target BERs. Compared to classical techniques, the new approaches combine diversity and beamforming and obtain in return better performances
Semlali, Hayat. "Développement de nouvelles structures et d'algorithmes appliquant l’échantillonnage aléatoire pour des systèmes de type radio logicielle et radio cognitive". Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=50ca55df-b56d-4c7c-817c-8976af7c725b.
Texto completoIn this work we apply random sampling in the context of software radio and cognitive radio. The use of random sampling makes it possible to overcome the aliasing constraint imposed by the uniform sampling case. The first part is dedicated to the key element of software radio systems which is the digital front-end. We present different methods for randomly sampled signals reconstruction and for channel filtering. We are interested by iterative methods due to their flexibility and convergence speed. Later we propose a new structure of the digital front-end based on the ADPW-GC iterative method for channel selection by applying random sampling in a software radio context. The performance of this method is analyzed in terms of complexity, quality of reconstructed signal and robustness and compared with classical structures. The second part, deals with the spectrum sensing which is one of the main functions of cognitive radio. The performance of these structures are evaluated and compared to the case of uniform sampling. After the theoretical and simulation studies, some applications are given in the context of software defined radio and cognitive radio based on real FM radio signals
Samb, Moustapha. "Etude de la radio au Sénégal et des nouvelles stratégies des stations internationales". Bordeaux 3, 1996. http://www.theses.fr/1996BOR30034.
Texto completoPache, Denis. "Étude de nouvelles architectures pour l'intégration de fonctions radio fréquence en technologie BiCMOS". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0079.
Texto completoCollot, Ludovic. "Étude de nouvelles architectures de filtres RF intégrés dans le contexte de la radio opportuniste". Limoges, 2011. https://aurore.unilim.fr/theses/nxfile/default/790e39b6-b073-4378-9625-215ed53b5b21/blobholder:0/2011LIMO4020.pdf.
Texto completoThis work concerns the conception of microwaves filtering functions at the same time band-pass, MMIC technology compliant, tunable and differential. The main objective is to realize filtering structures compatible with opportunist radio. The second objective is to demonstrate that ferromagnetics inductors improves the performance of such devices. Commersialised RF receivers are deadlocked due to their topologies and used components (SAW filter, LNA for example). We put forward new integrated circuits : filtering LNA and 1, 2 and 3 poles filters usable in fully frequency tunable receivers. These circuits are Q-enhanced resonator based. They have a continuous frequency and bandwidth tunability over an octave. The observed results at first for filtering LNA mixe wide tunablility, gain and low noise figure on a unique MMIC circuit. This contribution is a first step toward opportunists receivers
Bissonnette, Stéphanie. "Comparaison du registre de lecteurs de bulletins de nouvelles québécois et français /". Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2000. http://theses.uqac.ca.
Texto completoHebert, Alexandra. "Mise au point de nouvelles techniques de radio-iodation et application au radiomarquage de molécules d'intérêt". Thesis, Normandie, 2019. http://www.theses.fr/2019NORMC413/document.
Texto completoLabeling of (bio)molecules with radioactive isotopes is of high interest to for the scientific commu-nity, as it strongly impacts the discovery process in life science and nuclear medicine. Radiolabeled molecules have been extensively used to assess biochemical reactions, to measure in vivo distribution of a substance or to preform RIA (RadioImmunoAssay). In nuclear medicine, radio-therapeutics for RIT (RadioIsotope Therapy) and radio-tracers for molecular imaging experiments such as PET (Positron Emission Tomography), SPECT (Single Photon Emission Computed Tomography) or scintigraphy have been described. Several useful isotopes of iodine can be used for both diagnosis and therapy: 123I for SPECT imaging, 124I for PET imaging, 125I for biological assays and 131I for radio-therapy and scintig-raphy.Classical methods of radioiodination methods use a prefunctionalized precursor, which must be syn-thesized, isolated and purified before being introduced to the radio-iodination step. The radioiodode-stannylation method is the most popular method, although stannylated precursors are known for their difficult synthesis and their toxicity. The development of new methods of radioiodination is therefore of great interest in the field of radiochemistry.Based on a previous work, our group has developed a method to radio-iodinate N-acylsulfonamides through a room temperature palladium mediated C-H radio-iodination. This original strategy allows radiolabeling of biomolecules in very mild conditions without the use of chemical precursors.Based on literature, our group is now developping a new method to radio-iodinate arylsilyl derivates through radioiododesilylation in mild conditions. This general methodology allows for the moment the radiolabeling of activated arylsilyl derivates in mild conditions
Hudin, Nicolas. "Développement de nouvelles sondes per-opératoires positon pour guider la chirurgie des tumeurs solides". Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00906756.
Texto completoGiffard, Robert. "L'importance accordée à l'actualité internationale à la télévision, étude comparative des bulletins d'information de Radio-Canada et de France 2 en 1998". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ55757.pdf.
Texto completoMontavon, G. "La chimie des radio-isotopes; développement de nouvelles connaissances et valorisation sociétale pour la santé et l'environnement". Habilitation à diriger des recherches, Université de Nantes, 2009. http://tel.archives-ouvertes.fr/tel-00611668.
Texto completoDedieu, Alain. "Exploration des modifications post-traductionnelles des protéines : nouvelles approches et nouveaux modèles biologiques". Thesis, Montpellier 1, 2014. http://www.theses.fr/2014MON13516/document.
Texto completoRecently, the study of post-translational modifications has greatly evolved, mainly because of crucial progresses in mass spectrometry methodology which have allowed high-throughput, high resolution analysis. Their variety and their role in the regulation of key molecular mechanisms are increasingly documented. In this work, the different degrees of iodination of tyrosine were probed with a "shotgun" approach carried out from an entire organ, the mice thyroid. Post-translational modifications present in two radioresistant organism models, the bacterium Deinococcus deserti and the archaeon Thermococcus gammatolerans, were analyzed. The large scale exploration of N-terminal acetylation in D. deserti indicates a specific pattern of this modification on serine and threonine, as well as an atypical, high propension to acetylation with 50% of modified N-termini. In T. gammatolerans, N-terminal acetylation is rare, but the presence of acetylation on lysine side chains is significant. The presence of phosphorylation on these proteins suggests a potential "cross talk" between the acetylated lysine and phosphorylated serine or threonine residues. This work demonstrates that the complexity of the proteome in prokaryotes through post-translational modifications is higher than expected when extremophiles are scrutinized compared to classical prokaryote models. Interdependencies between post-translational modifications definitively deserve a fresher look
Bissonnette, Stéphanie. "Comparaison du registre de lecteurs de bulletins de nouvelles québécois et français". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ53925.pdf.
Texto completoBruneau, Véronique. "L'information internationale dans les bulletins de nouvelles de Radio-Canada: L'influence du traitement journalistique sur l'acquisition de connaissances des jeunes adultes québécois". Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27448.
Texto completoPaolini, Marion. "Nouvelles compositions pour l'administration d'agents thérapeutiques : Apport de la nanomédecine pour l'optimisation du ratio bénéfice-risque du traitement". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS095.
Texto completoDifferences in drug response among patients are common, often leading to challenges in targeting the therapeutic window and optimizing the treatment. Major drugs are reported to be effective in only 25% to 60% of patients. Two important factors responsible for the effective dose of drug are drug metabolism and clearance. Notably, CYP3A4 is the main enzyme responsible for drug metabolism in hepatocytes; variations in its activity result in dose uncertainty. To improve drug’s effectiveness, this thesis work focuses on the development of nanocarriers loaded with natural CYP3A4-inhibiting molecules and targeting hepatocytes, to be administered prior to the drug to minimize its metabolism. A methodology to systematically screen CYP3A4-inhibiting compounds and set the dose and schedule for in vivo use was developed. A first proof-of-concept was demonstrated using a furanocoumarin-loaded micelle as CYP3A4-inhibiting compound: anti-tumor efficacy studies and quantification within tumor of the cytotoxic drug docetaxel, injected after furanocoumarin-loaded micelle, were engaged on two xenografted tumor models in mice. A second generation of nanocarriers was developed, with optimised physico-chemical properties to target specifically hepatocytes. The demonstration of their specific accumulation in hepatocytes and additional improvement in boosting of docetaxel was conducted. A perspective in using such an approach to enhance the effectiveness of existing drugs in oncology is discussed, notably for differentiated hepatocellular carcinoma
Siracusa, Jacques. "Le corps des reporters et la forme des reportages : approche sociologique des actualités télévisées". Paris 8, 1999. http://www.theses.fr/1999PA081551.
Texto completoA double process based on archives, interviews and statistics analysis is described : the alignment of the activity on a professional example and the building up of a differenciated and self regulated environment. Tv news has inherited from the work organization of the filmed media, centered on the cameraman and the mute report. The 60's have been a transitional period and a progressive investment of the ground by the office : the cameraman becomes dependent on the editor-interviewer. The editing becomes autonomous and is in line with the model of a big press compagny. The career analysis reveals a double movement. An increasing internal staff recruitment of managers and the existence of regularities in the route within editing offices, an avoidance of the editing specialization, the frequent orientation towards program management and a colleague net structuring a professional environment. The study of exercice modes of a cameraman allows this time the description of a report market from the ground. Observations and tv news analysis shows that report concept depends on specific formats of the work context. Different devices create situation and organize co-operation between colleagues and the flow of treatment. Technical and artistic or rhetoric agreement and improvised manipulation help to clarify the subjects and help them become aesthetically pleasing, compensate lacks, protect oneself from critics and express the value of products. The tv news programming reproduces an editorial structure dependent on the production conditions. The invisible organization of activity contributes to explain the form of visible document. The out of vision images often corresponds to the work backstage and what is useful to grab viewer's attention is also useful to the liability and preservation of institution. The effect of the traitment is to generalize information, to bring out of context, and to interpret according to a definition which depends on the professional context. Abstract images or extracted images are transformed and presented in a form or style that expresses the professional process and constitutes in itself the direction basis
Jousset, Malika. "Enjeux culturels et nouvelles stratégies participatives de l'immigration d'origine maghrébine établie en France : cas des pratiques radiophoniques en Ile-de-France (1990-1994)". Paris 7, 1995. http://www.theses.fr/1995PA070005.
Texto completoThe aim of this thesis is the study of cultural stakes and participation strategies of the north-african immigration fixed in france, and more specifically the case of radio practices in ile-de-france from 1990 to 1994. In the first part, we devellop the new sociological and cultural deal (cultural and identity requirements) of an immigration now fixed in france. The passage from a simple work strength alternating go-and-back to a stabilized and fixed immigration, and the emergent claims connected to a significant participation ot the various social processus and to access to medias. The second part deals with the emergence of north-african radios : radio-soleil, beur-fm, radio-france maghreb. We also studied specific case of radio-orient. This part comprise a study of radios objectives, status, programms and financial means. The third part is devoted to an inquest on radios habits away from original frontiers, their interest and limitations
Coquereau, Samuel. "Study of the B⁰→K*⁰μ⁺μ⁻ decay with the LHCb experiment : angular analysis and measurement of the ratio RK*". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066366.
Texto completoRare beauty decays proceed mostly through the b→s Flavor Changing Neutral Current, which is possible only at loop level in the Standard Model. These FCNC processes are subject to GIM suppression leading to a rare decay. Therefore the b→s processes are good tools to look for New Physics phenomenon beyond the Standard Model. New Physics particle could become detectable by causing deviation from the Standard Model predictions for observables such as angular observables, branching ratio or CP asymmetries. This thesis present the angular analysis of the B⁰→K*⁰μ⁺μ⁻ decay with the whole dataset collected by lhcb during the first run of the lhc. The full set of the angular observables has been measured through a maximum likelihood fit, thanks to an improved selection and the 3 fb⁻¹ of data collected in 2011 and 2012 by lhcb. In addition, the analysis on the measurement of the ratio R_{K*} has also been presented and the results are expected by the end of 2015
Asemani, Davud. "ERREURS ANALOGIQUES DANS LES CAN A BANCS DE FILTRES HYBRIDES"Méthodes d'estimation et nouvelles structures"". Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00278194.
Texto completoGrall, Romain. "Nouvelles stratégies pour le traitement des tumeurs chimio et radio-résistantes : Nanodiamants hydrogénés et Solides hybrides poreux. Etude in vitro dans des systèmes 2D et 3D". Thesis, Paris 11, 2015. http://www.theses.fr/2015PA11T034/document.
Texto completoThe present work focuses on nanoparticles and their great skills for oncology therapies. Two kinds of nanoparticles have been studied in order to biologically validate and characterize their features. The use of hydrogenated Nanodiamonds (H-NDs) as radio sensitizer is based on a physic-chemical postulate where they act as oxidative stress generator through interaction with irradiation. Thus we validated this hypothesis in radio resistant kidney and breast cancer cell lines and identify senescence as the main pathway after co-treatment with H-NDs and irradiation. Metal organic frameworks are also of particular interest for drug delivery because of their very important loading capacities. Here we demonstrate the biocompatibility of the empty compounds in four lung and hepatic cancer cell lines, a main point before their involvement in drug delivery strategies. Finally, following international guidelines encouraging to make animal testing more ethic, we developed a new 3D cell culture mimicking mucinous lung adenocarcinoma. This well characterized model will be used for the study of cancer development and drug screening
Kahane, Claudine. "Observations millimétriques de molécules circumstellaires : de la recherche de nouvelles espèces, à la mesure d'abondances isotopiques". Phd thesis, Grenoble 1, 1989. http://tel.archives-ouvertes.fr/tel-00724537.
Texto completoHeinderyckx, François. "Nations et médias d'information: études de contenus et de publics de médias d'information dans leur articulation avec l'espace national et examen de l'approche transnationale". Doctoral thesis, Universite Libre de Bruxelles, 1995. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212494.
Texto completoChanter, Alaine y alaine chanter@canberra edu au. "Contested Identity: the media and independence in New Caledonia during the 1980s". The Australian National University. Research School of Pacific and Asian Studies, 1996. http://thesis.anu.edu.au./public/adt-ANU20040923.133021.
Texto completoYaacoub, Tina. "Nouvelles approches pour l'estimation du canal ultra-large bande basées sur des techniques d'acquisition compressée appliquées aux signaux à taux d'innovation fini IR-UWB". Thesis, Brest, 2017. http://www.theses.fr/2017BRES0077/document.
Texto completoUltra-wideband impulse radio (IR-UWB) is a relatively new communication technology that provides an interesting solution to the problem of RF spectrum scarcity and meets the high data rate and precise localization requirements of an increasing number of applications, such as indoor communications, personal and body sensor networks, IoT, etc. Its unique characteristics are obtained by transmitting pulses of very short duration (less than 1 ns), occupying a bandwidth up to 7.5 GHz, and having an extremely low power spectral density (less than -43 dBm / MHz). The best performances of an IR-UWB system are obtained with Rake coherent receivers, at the expense of increased complexity, mainly due to the estimation of UWB channel, which is characterized by a large number of multipath components. This processing step requires the estimation of a set of spectral components for the received signal, without being able to adopt usual sampling techniques, because of the extremely high Nyquist limit (several GHz).In this thesis, we propose new low-complexity approaches for the UWB channel estimation, relying on the sparse representation of the received signal, the compressed sampling theory, and the reconstruction of the signals with finite rate of innovation. The complexity reduction thus obtained makes it possible to significantly reduce the IR-UWB receiver cost and consumption. First, two existent compressed sampling schemes, single-channel (SoS) and multi-channel (MCMW), are extended to the case of UWB signals having a bandpass spectrum, by taking into account realistic implementation constraints. These schemes allow the acquisition of the spectral coefficients of the received signal at very low sampling frequencies, which are not related anymore to the signal bandwidth, but only to the number of UWB channel multipath components. The efficiency of the proposed approaches is demonstrated through two applications: UWB channel estimation for low complexity coherent Rake receivers, and precise indoor localization for personal assistance and home care.Furthermore, in order to reduce the complexity of the MCMW approach in terms of the number of channels required for UWB channel estimation, we propose a reduced number of channel architecture by increasing the number of transmitted pilot pulses. The same approach is proven to be also useful for reducing the sampling frequency associated to the MCMW scheme.Another important objective of this thesis is the performance optimization for the proposed approaches. Although the acquisition of consecutive spectral coefficients allows a simple implementation of the MCMW scheme, we demonstrate that it not results in the best performance of the reconstruction algorithms. We then propose to rely on the coherence of the measurement matrix to find the optimal set of spectral coefficients maximizing the signal reconstruction performance, as well as a constrained suboptimal set, where the positions of the spectral coefficients are structured so as to facilitate the design of the MCMW scheme. Finally, the approaches proposed in this thesis are experimentally validated using the UWB equipment of Lab-STICC CNRS UMR 6285
Reboux, Josué. "Une nouvelle approche de la fluorescence induite par laser pour la détermination de la richesse à haute pression. Application à l'étude de la combustion dans un moteur à allumage commandé". Rouen, 1995. http://www.theses.fr/1995ROUES026.
Texto completoBesner, Quintal Aryanne. "Les radios communautaires et le développement à l'ère des technologies de l'information et de la communication : le cas de cinq radios équatoriennes". Mémoire, 2011. http://www.archipel.uqam.ca/4007/1/M11949.pdf.
Texto completoCoquereau, Samuel. "Study of the B0→K*0μ+μ- decay with the LHCb experiment : angular analysis and measurement of the ratio RK*". Thesis, 2015. http://www.theses.fr/2015PA066366/document.
Texto completoRare beauty decays proceed mostly through the $b\to s$ Flavor Changing Neutral Current, which is possible only at loop level in the Standard Model. These FCNC processes are subject to GIM suppression leading to a rare decay. Therefore the $b\to s$ processes are good tools to look for New Physics phenomenon beyond the Standard Model. New Physics particle could become detectable by causing deviation from the Standard Model predictions for observables such as angular observables, branching ratio or CP asymmetries. This thesis present the angular analysis of the $B^0\to K^{*0}\mu^+\mu^-$ decay with the whole dataset collected by lhcb during the first run of the lhc. The full set of the angular observables has been measured through a maximum likelihood fit, thanks to an improved selection and the 3 fb$^{-1}$ of data collected in 2011 and 2012 by lhcb. In addition, the analysis on the measurement of the ratio $R_{K^*}$ has also been presented and the results are expected by the end of 2015
Chanter, Alaine. "Contested Identity: the media and independence in New Caledonia during the 1980s". Phd thesis, 1995. http://hdl.handle.net/1885/49321.
Texto completoKamdeu, Fansi Alvine A. "Une nouvelle méthode de détection du glaucome par la mesure de l'asymétrie interoculaire : l’asymétrie du rapport de la surface neurorétinienne sur la surface du disque optique ou rim area to disc area asymmetry ratio (RADAAR)". Thèse, 2009. http://hdl.handle.net/1866/3657.
Texto completoThis thesis describes a new clinical and technological approach to the diagnosis of glaucoma. Specifically, we intend to study a new way to detect glaucoma by measuring rim area to disc area asymmetry ratio (RADAAR). For this purpose, we use a database consisting of a population divided into 4 different diagnostic groups (normal, possible glaucoma, probable glaucoma and definitive glaucoma). The RADAAR measurements are calculated in different ways based on the stereometric parameters of the optic nerve head of subjects, produced by confocal scanning laser ophthalmoscopy (Heidelberg Retina Tomograph (HRT) (Heidelberg Engineering, Germany)). We conduct an analysis of data with SPSS or we put forward the RADAAR distribution in different populations, its validity in detecting open angle glaucoma and its usefulness in screening for glaucoma. We therefore enroll 523 subjects in this study with about 82 subjects with definitive glaucoma. The average age is 62 years. There are more females than males and more Caucasians than Africans Caraibeans. We find that the distribution of RADAAR measures is different in each diagnosis group. In terms of performance, the sensitivity of the RADAAR measurement is very low. So, its ability to detect the disease is low. However the RADAAR measure is much more specific so, its ability to identify subjects free of the disease is high. RADAAR measure would also be much more effective in African Caribbean’s than in Caucasians. Similarly, it would be much more sensitive in males than in females. The RADAAR measurement is useful if it is combined with another method of diagnosis like the Moorfields regression analysis (MRA) included in the HRT3 software especially in case of the detection of glaucoma in populations at high risk. Ultimately, we determine that the RADAAR is an interesting tool for the diagnosis of glaucoma particularly in the context of screening for glaucoma.