Literatura académica sobre el tema "Cap magnétique"
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Artículos de revistas sobre el tema "Cap magnétique"
Villani, Riccardo, Astrid Roosendaal, Pauline Hämmerli y Christophe E. Iselin. "PSA et IRM: comment s’en servir de façon raisonnable pour la détection du cancer de la prostate". Urologie in der Praxis 22, n.º 4 (16 de noviembre de 2020): 153–59. http://dx.doi.org/10.1007/s41973-020-00118-7.
Texto completoBarr, Sandra M., Sonya A. Dehler y Louis Zsámboki. "Connecting Cape Breton Island and Newfoundland, Canada: Geophysical Modeling of pre-Carboniferous 'Basement' Rocks in the Cabot Strait Area". Geoscience Canada 41, n.º 2 (7 de mayo de 2014): 186. http://dx.doi.org/10.12789/geocanj.2014.41.041.
Texto completoLakehal, Redha, Soumaia Bendjaballah, Farid Aimer, Rabeh Bouharagua, Khacha Khaled y Abdelmalek Bouzid. "Aneurysm of the distal aortic arch including the origin of the left subclavian artery : Case report". Batna Journal of Medical Sciences (BJMS) 7, n.º 2 (9 de noviembre de 2020): 186–88. http://dx.doi.org/10.48087/bjmscr.2020.7226.
Texto completoTesis sobre el tema "Cap magnétique"
Bruand, Stéphane. "Elaboration d'aimants plastoferrites orientés : optimisation des caractéristiques de la poudre magnétique de départ et de la matrice polymère : calcul des circuits magnétiques pour l'obtention de pièces injectées à orientation radiale ou axiale". Grenoble INPG, 1990. http://www.theses.fr/1990INPG0063.
Texto completoMonnier, Laurine. "Analyses structurales par microscopie électronique d'hexaferrites magnétiques Ca2+xFe16-xO26-(x/2)". Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC224/document.
Texto completoThis thesis reports on the synthesis and the characterization of hexaferrite compounds in the Ca-Fe-O system. This work has allowed to isolate four polycrystalline compounds presenting the chemical formula (Ca4Fe5O13)1-x(Fe9O12)1+x (x= 0.334; 0.301 and 0.128) and (Ca4Fe5O13)(Fe4O4). Their crystalline structure has been determined using the precession electron diffraction tomography and has been validated through high resolution imaging microscopy (HREM/HAADF). X-ray diffraction and neutron diffraction studies on polycrystalline samples have confirmed the different structural models. Fine analysis of intergrowth defects in HAADF imaging revealed significant deviations in composition with respect to the ideal composition (Ca4Fe5O13)(Fe9O12) at the origin of the three observed polymorphs. In addition to the studies on micron-sized crystals in the 80s, obtaining polycrystralline samples allowed the measurement of their physical properties. Despite the complexity of these structures and the presence of extensive defects, the Mössbauer spectroscopy has highlighted a unique oxidation degree of iron (+3) and confirmed as well the various magnetic transitions initially detected by magnetization measurements, as well as their evolution versus the x deviation value. Electrical resistivity and Seebeck coefficient measurements were performed on the samples
Thebault, Caroline. "Liposomes théranostiques pour le ciblage magnétique et le relargage d'un antitumoral par ultrasons focalisés, suivis par IRM multiparamétrique". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066022.
Texto completoTheranostic systems with imaging and therapeutic properties are developed to monitor treatments in vivo. The strategy we propose here is to design thermosensitive drug-loaded magnetic liposomes to treat superficial colon tumors CT26 on mice. These nanocarriers can be accumulated in the tumor by using a magnetic field gradient and the drug release can be triggered by a local heating induced by HIFU (High Intensity Focused Ultrasounds). They have been developed by co-encapsulation of magnetic nanoparticles and the antitumoral drug CA4P (Combretastatin A-4 Phosphate) in thermosensitive liposomes. The high loading of maghemite (γ-Fe2O3) magnetic nanoparticles enables both magnetic targeting and in vivo monitoring by MRI of this Ultra-Magnetic Liposomes (UML). In vitro HIFU heating at the UML membrane transition temperature improved the drug release. In vivo UML biodistribution was evaluated with dynamic susceptibility contrast imaging adjusted in time acquisition in MRI and the magnetic targeting efficiency was shown with a new MRI imaging processing. Adjustments of in vivo HIFU sequences to locally heat the tumor at the UML transition temperature allowed the triggering of drug release. Treatment efficiency was monitored by multiparametric diffusion, T2* weighted, anatomical and perfusion MRI and histology
Friedt, Oliver. "Relation entre la structure, le magnétisme et l'état électronique dans Ca2-xSrxRuO4 : étude par diffusion des neutrons". Paris 11, 2003. http://www.theses.fr/2003PA112084.
Texto completoIn this thesis we aimed at exploring the structural and magnetic phase diagram of Ca(2-x)Sr(x)RuO4 using neutron scattering techniques. Our detailed studies show that the magnetic and electronic properties are closely correlated to the observed structural distortions induced by the isovalent Ca substitution. First, with the substitution of Sr by Ca in Ca(2-x)Sr(x)RuO4 the system undergoes a structural phase transition characterised by the rotation of the RuO6 octahedron around the c axis. Upon further Ca substitution a second structural phase transition sets in around x~0. 5, which is characterised by an additional tilt of the octahedron around an in-plane axis. Further reduction of the Sr concentration drives the system via a first order transition from a metallic phase to an antiferromagnetic insulating ground state, accompanied by a characteristic flattening of the RuO6 octahedron along the c axis. Moreover, the magnetic excitations in Ca(2-x)Sr(x)RuO4 close to the concentration where the static low temperature susceptibility is maximal have been analyzed by inelastic neutron scattering. The excitation spectrum in such a sample is no longer dominated by the nesting excitations which are present in Sr2RuO4; instead we find incommensurate scattering at wave vectors close to the zone centre. The peaks that dominate the magnetic fluctuations are rather broad in Q space and have significant extension to the two-dimensional zone-centre. We argue, that together with the small characteristic energy these features may account for the strong enhancement of the low temperature macroscopic susceptibility towards the critical concentration x(c)= 0. 5. We propose a phenomenological model to explain the incommensurate fluctuations in Ca(2-x)Sr(x)RuO4 for x close to 0. 5. Within this model the incommensurate peak can be directly correlated with nesting features of the γ sheet, which is strongly affected by the corresponding van Hove singularity. It turns out that the van Hove singularity dominates not only the density of states at and near E(F), but may lead, when passing through E(F), to a topological change of the Fermi surface which give rise to new nesting features. This nesting effect would occur at incommensurate wave vector which are in qualitative agreement with our data. Keywords: Ruthenates, Metal- Insulator Transition, Structural Phase Transition, Magnetism, Neutron Diffraction, Dynamic Properties -Spin fluctuation, Inelastic neutron scattering
Delinchant, Benoît. "La CAO et l'optimisation de systèmes, une approche par couplages dynamiques de composants". Habilitation à diriger des recherches, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00677457.
Texto completoLehaire, Jérôme. "Détection et caractérisation du cancer de la prostate par images IRM 1.5T multiparamétriques". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1174/document.
Texto completoProstate cancer is the most frequent and the fourth leading cause of mortality in France. Actual diagnosis methods are often insufficient in order to detect and precisely locate cancer. Multiparametrics MRI is now one of the most promising method for accurate follow-up of the disease. However, the visual interpretation of MRI is not easy and it is shown that there is strongvariability among expert radiologists to perform diagnosis, especially when MR sequences are contradictory. Under these circumstances, a strong interest is for Computer-aided diagnosis systems (CAD) aiming at assisting expert radiologist in their final decision. This thesis presents our work toward the conception of a CADe which final goal is to provide a cancer probability map to expertradiologist. This study is based on a rich dataset of 49 patients made of T2w, dynamic and diffusion MR images. The ground truth was obtained through strict process of annotations and correlation between histology and MRI. This thesis focuses both for cancer detection and characterization in order to provide a cancer probability map correlated to cancer aggressiveness (Gleason score). To that end we used a dictionary learning method to extract new features to better characterize cancer aggressiveness signatures as well as image features. Those features are then used as an input to Support Vector Machines (SVM) and Logistic Regression (LR) classifiers to produce a cancer probability map. We then focused on discriminating agressive cancers (Gleason score >6) from other tissues and provided an analysis of the correlation between cancer aggressiveness and probabilities. Our work conclude on a strong capability to distinguish agressive cancer from other tissues but fails to precisely distinguish different grades of cancers
Delinchant, Benoit. "Un Environnement à base de Composants, Intégrant le Concepteur et ses Outils, pour de Nouvelles Méthodes de CAO". Phd thesis, Grenoble INPG, 2003. http://tel.archives-ouvertes.fr/tel-00332801.
Texto completoLehaire, Jérôme. "Détection et caractérisation du cancer de la prostate par images IRM 1.5T multiparamétriques". Electronic Thesis or Diss., Lyon, 2016. http://www.theses.fr/2016LYSE1174.
Texto completoProstate cancer is the most frequent and the fourth leading cause of mortality in France. Actual diagnosis methods are often insufficient in order to detect and precisely locate cancer. Multiparametrics MRI is now one of the most promising method for accurate follow-up of the disease. However, the visual interpretation of MRI is not easy and it is shown that there is strongvariability among expert radiologists to perform diagnosis, especially when MR sequences are contradictory. Under these circumstances, a strong interest is for Computer-aided diagnosis systems (CAD) aiming at assisting expert radiologist in their final decision. This thesis presents our work toward the conception of a CADe which final goal is to provide a cancer probability map to expertradiologist. This study is based on a rich dataset of 49 patients made of T2w, dynamic and diffusion MR images. The ground truth was obtained through strict process of annotations and correlation between histology and MRI. This thesis focuses both for cancer detection and characterization in order to provide a cancer probability map correlated to cancer aggressiveness (Gleason score). To that end we used a dictionary learning method to extract new features to better characterize cancer aggressiveness signatures as well as image features. Those features are then used as an input to Support Vector Machines (SVM) and Logistic Regression (LR) classifiers to produce a cancer probability map. We then focused on discriminating agressive cancers (Gleason score >6) from other tissues and provided an analysis of the correlation between cancer aggressiveness and probabilities. Our work conclude on a strong capability to distinguish agressive cancer from other tissues but fails to precisely distinguish different grades of cancers
Johansson, Clotilde. "Oxydation par les ferrates d’un sol contaminé par du DNAPL en condition saturée : conséquences sur les Composés Aromatiques Polycycliques (HAP et CAP Polaires) : Expérimentations en batch et colonne". Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0244.
Texto completoSoils encountered at former coking plant sites are often impacted by Polycyclic Aromatic Compounds (PAC) inherited from coal tar spillages. The remediation of the source zones is complex, particularly in the aquifer where Dense Non-Aqueous Phase Liquids (DNAPL) occur. This thesis is part of the BIOXYVAL project and focuses on the in situ chemical oxidation of residual tar, remaining in the saturated zone after pumping of the DNAPL. The objectives of this thesis were to study and compare the oxidative efficiency of ferrates with other oxidants to remediate a solid matrix spiked with DNAPL. This work aimed to (i) understand the global degradation mechanisms, (ii) evaluate the possible formation of hazardous oxygenated by-products (O-PAC) and (iii) identify the limitations for an in situ application. Two laboratory studies were conducted: batch experiments, ideal reactor and enclosed system, and column experiments under flow through conditions. Our works highlight (batches) the systematic production and accumulation of O-PAC ketones along oxidation with permanganate and ferrates (oxydo-reductive pathway), whereas oxidants following a radical mechanism do not show accumulation of those by-products. High degradation yields are measured with all oxidants tested (except the Fenton-like and the hydrogen peroxide). Permanganate and ferrates were then studied in column experiments. The limited reactivity of permanganate linked to the stability and low availability of the pollutants resulted on a poor efficiency of the oxidant under continuous flushing. The MnO2 precipitates did not have a high impact on porosity but seemed to reduce the availability of the pollutants during oxidation. Production of O-PAC were measured with lixiviated particles. In the contrary, ferrates injections induced a rapid clogging of the porous media, linked to the formation of ferric particles. Simultaneously, high remobilization of DNAPL drops was observed during the injections. Like permanganate, some O-PAC by-products were detected with lixiviated particles. The results demonstrate the ability of ferrates to degrade PACs from the DNAPL but show that their injection in situ is today impractical, as the technical and economic feasibility are not forthcoming. This work suggests considering the optimization of ferrates application and propose other solutions for the studied site
Daou, Andrea. "Real-time Indoor Localization with Embedded Computer Vision and Deep Learning". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMR002.
Texto completoThe need to determine the location of individuals or objects in indoor environments has become an essential requirement. The Global Navigation Satellite System, a predominant outdoor localization solution, encounters limitations when applied indoors due to signal reflections and attenuation caused by obstacles. To address this, various indoor localization solutions have been explored. Wireless-based indoor localization methods exploit wireless signals to determine a device's indoor location. However, signal interference, often caused by physical obstructions, reflections, and competing devices, can lead to inaccuracies in location estimation. Additionally, these methods require access points deployment, incurring associated costs and maintenance efforts. An alternative approach is dead reckoning, which estimates a user's movement using a device's inertial sensors. However, this method faces challenges related to sensor accuracy, user characteristics, and temporal drift. Other indoor localization techniques exploit magnetic fields generated by the Earth and metal structures. These techniques depend on the used devices and sensors as well as the user's surroundings.The goal of this thesis is to provide an indoor localization system designed for professionals, such as firefighters, police officers, and lone workers, who require precise and robust positioning solutions in challenging indoor environments. In this thesis, we propose a vision-based indoor localization system that leverages recent advances in computer vision to determine the location of a person within indoor spaces. We develop a room-level indoor localization system based on Deep Learning (DL) and built-in smartphone sensors combining visual information with smartphone magnetic heading. To achieve localization, the user captures an image of the indoor surroundings using a smartphone, equipped with a camera, an accelerometer, and a magnetometer. The captured image is then processed using our proposed multiple direction-driven Convolutional Neural Networks to accurately predict the specific indoor room. The proposed system requires minimal infrastructure and provides accurate localization. In addition, we highlight the importance of ongoing maintenance of the vision-based indoor localization system. This system necessitates regular maintenance to adapt to changing indoor environments, particularly when new rooms have to be integrated into the existing localization framework. Class-Incremental Learning (Class-IL) is a computer vision approach that allows deep neural networks to incorporate new classes over time without forgetting the knowledge previously learned. In the context of vision-based indoor localization, this concept must be applied to accommodate new rooms. The selection of representative samples is essential to control memory limits, avoid forgetting, and retain knowledge from previous classes. We develop a coherence-based sample selection method for Class-IL, bringing forward the advantages of the coherence measure to a DL framework. The relevance of the methodology and algorithmic contributions of this thesis is rigorously tested and validated through comprehensive experimentation and evaluations on real datasets
Libros sobre el tema "Cap magnétique"
K, Chan Karence y Pathria Mini, eds. MRI of the musculoskeletal system. 2a ed. Philadelphia: Lippincott Williams & Wilkins, 2001.
Buscar texto completoLowther, D. A. Computer-aided design in magnetics. New York: Springer-Verlag, 1986.
Buscar texto completoP, Silvester P., ed. Computer-aided design in magnetics. Berlin; New York: Springer-Verlag, 1986.
Buscar texto completoLowther, D. A. Computer-aided design in magnetics. Berlin: Springer, 1986.
Buscar texto completo(Editor), Karence K. Chan y Mini Pathria (Editor), eds. MRI of the Musculoskeletal System. 2a ed. Lippincott Williams & Wilkins, 2001.
Buscar texto completoMai, Wilfried. Diagnostic MRI in Dogs and Cats. Taylor & Francis Group, 2018.
Buscar texto completoDiagnostic MRI in Dogs and Cats. Taylor & Francis Group, 2018.
Buscar texto completoMai, Wilfried. Diagnostic MRI in Dogs and Cats. Taylor & Francis Group, 2018.
Buscar texto completoMai, Wilfried. Diagnostic MRI in Dogs and Cats. Taylor & Francis Group, 2018.
Buscar texto completoMai, Wilfried. Diagnostic MRI in Dogs and Cats. Taylor & Francis Group, 2018.
Buscar texto completoCapítulos de libros sobre el tema "Cap magnétique"
GAILLER, Lydie y Jean-François LÉNAT. "La surveillance magnétique des volcans". En Aléas et surveillance de l’activité volcanique 3, 285–99. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9046.ch6.
Texto completoESCUDÉ, Pierre. "Calculabilité vs prédictibilité". En Des langues calculables à l'homme incalculable, 27–36. Editions des archives contemporaines, 2021. http://dx.doi.org/10.17184/eac.5260.
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