Search results for "données"
showing 10 items of 154 documents
Évaluation de la pratique chirurgicale dans le traitement du cancer bronchique en France à partir de la base nationale du PMSI
2019
Background - In recent years, improving the quality of care has been a concern for health professionals in France, through the certification of institutions, accreditation and continuous professional development. Evaluation of these different measures has rarely been carried out. The objective of the study was to evaluate the quality of surgical management of lung cancer in different regions using hospital mortality as an indicator. Method - From the national database of the Program of Medical Information Systems (PMSI), data on all patients who had undergone surgery for lung cancer were extracted as well as the characteristics of the centers. The main outcome criterion was hospital mortali…
Identification of patterns og change on mongitudinal data, illustrated by two exemples : study of hospital pathways in the management of cancer. Cons…
2014
Context In healthcare domain, data mining for knowledge discovery represent a growing issue. Questions about the organisation of healthcare system and the study of the relation between treatment and quality of life (QoL) perceived could be addressed that way. The evolution of technologies provides us with efficient data mining tools and statistical packages containing advanced methods available for non-experts. We illustrate this approach through two issues: 1 / What organisation of healthcare system for cancer diseases management? 2 / Exploring in patients suffering from metastatic cancer, the relationship between health-related QoL perceived and treatment received as part of a clinical tr…
Unified mapping of the dynamics of solitons in fiber-optic waveguides
2013
This thesis examines the dynamical behaviour of solitons which are affected, when entering a fiber-optic waveguide, by a slight distortion of profile as compared to the stationary profile in the guide. Our theoretical model combines the propagation equation of the electric field (Non-Linear Schrödinger Equation) and the system of equations of evolution of the physical parameters of the pulse (derived from the collective coordinates theory). We establish a general mapping which reveals an unsuspected diversity of dynamic behaviour around the stationary state of the pulse, in relation with the initial perturbation of the pulse's profile. This mapping establishes a classification of solitons i…
Application of the collective coordinate method to the analysis of the dynamics of mode-locked fiber lasers
2015
Mode-locked fiber laser are among the few systems that allow to achieve a variety of elaborate optical functions, by means of few optical components. The use of dispersion management brings to this type of lasers a variety of behaviors, which is so rich that the complete mapping and detailed analysis of the stable states becomes impractical when conventional tools based on the intra-cavity field propagation equations, are used. In this thesis we show that the addition of the technique ofcollective coordinates to the conventional theoretical tools, allows to solve at least in part the problem of complexity and diversity of the stable states of the cavity. In particular, we propose the DCCA (…
Implementing a culture of data in franchise systems : the ingredients for success
2020
The purpose of our research is to improve the understanding of the factors that explain the development of exchange relationships and facilitate the customer data management in franchise Systems. To this end, a literature review was conducted in the field of relationship marketing, and particulary, in relation to Bagozzi's theory of exchange (1974; 1975). Through its lexical and thematic analyses, the qualitative study highlights the principle of reciprocity in exchange in franchisor-franchisee-customer relationships with regard to customer data management. Reciprocity seems to be at the core of exchanges between the franchisor, franchisees and their customers.
Sténoses carotidiennes athéromateuses : causes fondamentales et conséquences cliniques
2014
The treatment of high-grade carotid stenosis is surgery combined with best medical treatment. We established since 2003, a prospective database including all patients hospitalized in our vascular surgery department for management of carotid stenosis. Since 2012, the clinical database was completed for the establishment of a biological database. We present here the method of setting up such a database, and the results of four original studies on the theme of "high-risk patient" for carotid surgery: the influence of renal function, of the delay between symptoms and surgery and of the contralateral carotid artery on outcome and the proposal of a prognostic score of intolerance to carotid clamp…
Contribution à l’apprentissage de représentation de données à base de graphes avec application à la catégorisation d’images
2020
Graph-based Manifold Learning algorithms are regarded as a powerful technique for feature extraction and dimensionality reduction in Pattern Recogniton, Computer Vision and Machine Learning fields. These algorithms utilize sample information contained in the item-item similarity and weighted matrix to reveal the intrinstic geometric structure of manifold. It exhibits the low dimensional structure in the high dimensional data. This motivates me to develop Graph-based Manifold Learning techniques on Pattern Recognition, specially, application to image categorization. The experimental datasets of thesis correspond to several categories of public image datasets such as face datasets, indoor and…
Covid-19 : quel bilan critique ? (Partie II)
2021
International audience
Covid-19 : quel bilan critique ? (Partie I)
2021
International audience
Gérer et ouvrir mes données de recherche : les bonnes pratiques
2022
Dans un esprit d’ouverture et de partage des savoirs scientifiques, l’équipe de documentalistes de l’Atelier de la donnée dat@UBFC viendra aborder les bonnes pratiques de gestion et d’ouverture des données de la recherche à la semaine de la DATA SHS.