Rozprawy doktorskie na temat „Répartitions”
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Moukouelle, Alice. "Morphologie des tournois et répartitions des 3-cycles". Aix-Marseille 3, 1998. http://www.theses.fr/1998AIX30105.
Pełny tekst źródłaDupont, Virginie. "Le vanadium en mer du Nord : analyse, apports et répartitions". Lille 1, 1990. http://www.theses.fr/1990LIL10196.
Pełny tekst źródłaFrey, Philippe. "Les nomades du Sahara et leurs technologies chamelières : tribus, répartitions, élevage, transhumances, caravanes". Université Marc Bloch (Strasbourg) (1971-2008), 1994. http://www.theses.fr/1994STR20039.
Pełny tekst źródłaThe purpose of this thesis is to study the different saharian nomadic tribes and their space distribution. For the main ones: bedja, kebabish and black arabs of sudan and chad, tubu, tuareg, maure and beraberarabs, northafrican arabs. . . Accent will be put on camel technics of breeding, training, saddling, harnessing. . . As well as transhumance necessity according to pasture types and seasons. Technics and caravan links are described and detailed. Sixty four illustrations and maps help to text comprehension. The study consists mainly in detailing camel technologies, different and specific to each nomadic grup
Navaux, Julien. "Les transferts intergénérationnels en France : stabilités et ruptures des répartitions entre classes d'âge". Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLED021.
Pełny tekst źródłaThe purpose of this dissertation is to asses if baby-boomers are responsible of intergenerational inequities in France. To answer this research question, the dissertation applies the National Transfer Accounts (NTA) methodology to the case of France, for the time period covering 1979-2011, therefore capturing national accounts aggregates such as consumption, individual resources, savings and transfers by age. Projections are conducted up to 2060 for public transfers inflows and for disposable income using the computable general equilibrium model “MELETE”, and the results are drawn from the main criteria of intergenerational justice. The results of this dissertation show that there is no obvious and widespread disruption of fairness between generations in the country. However, France is still characterized by intergenerational inequities seen through the allocation of asset income and publics pensions. The NTA methodology also provides useful results about private transfers in France. Since 1979, the role of wealth transfers increased over time, whereas the role of private transfers within households (intra-household transfers) decreased over this period and the role of regular, occasional and in-kind transfers between household (inter-household transfers) remained stable. It follows that private transfers are less and less responsive to the needs of transfer recipients. In fact, a micro econometric analysis using panel data shows that the life events experienced by transfer givers can trigger the payment of inter vivos wealth transfers, which is not the case for inter-household transfers that depend exclusively on the life events experienced by the recipients
Guesdon, Cyril. "Études des répartitions des événements de verglas et de givre à travers le Québec". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ57902.pdf.
Pełny tekst źródłaNiquin, Géraldine. "Répartitions fonctionnelle et personnelle du revenu : une analyse de décomposition de l'inégalité appliquée à la région MENA". Aix-Marseille 2, 2009. http://www.theses.fr/2009AIX24022.
Pełny tekst źródłaConsidering the two approaches of income distribution theory functional and personal approaches, the aim of this thesis is to provide an analysis of determinants of income distribution in two countries of the MENA region : Egypt and Morocco. Using household surveys data and applying an analytical framework based on traditional inequality decomposition methods and regression-based decomposition technics recently developed, we investigate the sources of inequality and quantify the contributions of functional and personal attributes to income inequality
Gérard, Pascal. "Système de détection utilisant une diode pin pour l'analyse des répartitions énergétique et spatiale d'électrons rétrodiffusés". Toulouse 3, 1993. http://www.theses.fr/1993TOU30022.
Pełny tekst źródłaLe, Texier Marion. "Les circulations internationales en Europe au XXIème siècle. De l'étude des répartitions monétaires à la modélisation d'un système complexe". Phd thesis, Université Paris-Diderot - Paris VII, 2014. http://tel.archives-ouvertes.fr/tel-00960529.
Pełny tekst źródłaLindemann, Yves. "Contribution à l'étude statistique des répartitions et à la modélisation de la dynamique de l'azote nitrique dans le sol". Paris 11, 1986. http://www.theses.fr/1986PA112364.
Pełny tekst źródłaRego, de Oliveira Carlos. "Contribution à l'optimisation des traitements laser en phase solide : Caractérisation des répartitions énergétiques et modélisation de l'interaction laser-matériau". Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0020.
Pełny tekst źródłaIn order to optimize and control the "laser process" in surface treatments of materials, this work concerns specially the characterization of energy repartitions laser beams and the modelling of the laser-material interaction. We define some relevant parameters taking place in the description of the induced effects and allowing to describe energy repartitions with a more or less complexity. Therefore, a method to evaluate experimentally these parameters is developed. Then we propose a model that allows a much more rapid prevision of surface temperature fields than by numerical methods and with an acceptable accuracy for an utilization in line control. The validation of this model is carried out by means of surface temperature measurements using a scanning IR camera. This comparison between theory and experiments is done for different types of incident energy repartitions in stationary and moving beam situation. Finally our attention is turned to the study of the absorption of an IR radiation by a substrate with or without a coating in order to propose some solutions to improve the energetic efficiency during laser treatments of metallic materials
Anglade, Agnès. "Méthode dynamique de recherche de points de contrôle pour le recalage de deux images". Paris 11, 1987. http://www.theses.fr/1987PA112361.
Pełny tekst źródłaLoeffler, Armin. "Mise au point d'une méthodologie basée sur la théorie des graphes et la théorie de l'information, pour quantifier l'ordre ou le désordre dans des répartitions de points". Aix-Marseille 3, 1996. http://www.theses.fr/1996AIX30107.
Pełny tekst źródłaDelaval, Gwenaël. "Répartition modulaire de programmes synchrones". Phd thesis, Grenoble INPG, 2008. http://tel.archives-ouvertes.fr/tel-00750832.
Pełny tekst źródłaGrangeas, Geneviève. "Croissance, cycles longs et répartition". Paris 1, 1989. http://www.theses.fr/1989PA010021.
Pełny tekst źródłaGirault, Alain. "Sur la répartition de programmes synchrones". Phd thesis, Grenoble INPG, 1994. http://tel.archives-ouvertes.fr/tel-00005097.
Pełny tekst źródłaSalem, Habermehl Rym. "Répartition de programmes synchrones temps réel". Phd thesis, Université Joseph Fourier (Grenoble), 2001. http://tel.archives-ouvertes.fr/tel-00004703.
Pełny tekst źródłaSchweitz, Nicolas. "La répartition de la charge fiscale". Paris 2, 2002. http://www.theses.fr/2002PA020070.
Pełny tekst źródłaL'Hoir, Mathieu. "Répartition des revenus et capital humain". Paris 1, 2003. http://www.theses.fr/2003PA010007.
Pełny tekst źródłaMauduit, Christian. "Répartition modulo un des suites automatiques". Aix-Marseille 2, 1986. http://www.theses.fr/1986AIX22006.
Pełny tekst źródłaMartel, Emmanuelle. "La répartition inégale des résultats sociaux". Rennes 1, 2000. http://www.theses.fr/2000REN10407.
Pełny tekst źródłaDantin, Fabienne. "Étude par microscopie ionique de la répartition intracellulaire de molécules et d'hormones : influence des irradiations sur cette répartition". Paris 12, 1997. http://www.theses.fr/1997PA120061.
Pełny tekst źródłaHemazro, Tekogan Dzigbodi. "Le problème de répartition des clientèles scolaires". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/MQ40589.pdf.
Pełny tekst źródłaDorat, Rémi. "Répartition spatiale en théorie des jeux évolutionnaires". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2009. http://tel.archives-ouvertes.fr/tel-00839387.
Pełny tekst źródłaBerger, Olivier. "Répartition géographique des filarioses humaines au Cameroun". Bordeaux 2, 1989. http://www.theses.fr/1989BOR25059.
Pełny tekst źródłaAhmat, Doungous. "Répartition géographique des bilharzioses humaines au Tchad". Bordeaux 2, 1991. http://www.theses.fr/1991BOR2M043.
Pełny tekst źródłaCharpentier, Michel. "Assistance à la répartition de systèmes réactifs". Toulouse, INPT, 1997. http://www.theses.fr/1997INPT097H.
Pełny tekst źródłaToulmonde, Vincent. "Fonction de répartition de [phi](n)/n". Evry-Val d'Essonne, 2004. http://www.theses.fr/2004EVRY0011.
Pełny tekst źródłaThis thesis deals with the modulus of continuity of the distribution function G of [phi](n)/n. The first part concerns the behavior of G(t) near t = 1. The behavior near 1 is studied by the means of functional equations. In order to establish such equations, a parameter y is introduced, which governs the size of the smallest prime factor P-(n) of a general integer n. In the second part, results for the modulus of continuity near any point are deduced from the behavior near t = 1, using a method of Erdös. The modulus attains its maximum when t is sufficiently close to 1/2. Estimates of in_nite and Lr norms of the modulus of continuity are obtained, when r > 1 is fixed
Kerner, Sébastien. "Répartition d'entiers avec contraintes sur les diviseurs". Nancy 1, 2002. http://www.theses.fr/2002NAN10239.
Pełny tekst źródłaThis thesis deals with the distribution of three sets of integers characterized by some properties on their divisors
Celebi, Özgün. "La répartition des risques dans le contrat". Paris 1, 2010. http://www.theses.fr/2010PA010317.
Pełny tekst źródłaGuibbaud-Seyte, Françoise. "Les modèles de distribution du revenu : application des modèles de C. Dagum aux distributions de salaires français". Montpellier 1, 1993. http://www.theses.fr/1993MON10008.
Pełny tekst źródłaIn this thesis, we have analysed and developped models of income distribution using the process followed by economists since v. Pareto's precursory work. It enables us to account for the evolution of distributions and to find out the inequality between and whitin the income distributions. This models were used as theoretic support fort the working out of c. Dagum's models in 1973 : a threeparameter model (type one) and four-parameter models (types two and three). These constructions count a theoretic basis leading to a series of economic and statistical properties. We have applied them tothe french salary distributions for the years 1982 and 1987. The adjustement of the models parameters (more appropriate in 1982 than in 1987) show the inequality in matter of distributions. To finish, the results reveal a decreasing inequality on national and regional salary scale
Crevits, Igor. "Répartition dynamique de taches dans les procédés complexes. Modélisation de la répartition anticipée : application au contrôle de trafic aérien". Valenciennes, 1996. https://ged.uphf.fr/nuxeo/site/esupversions/8e4a1e03-64eb-4e69-9a03-f26c175ea950.
Pełny tekst źródłaChen, Qixu. "Répartition géographique des investissements directs étrangers en Chine". Phd thesis, Université d'Auvergne - Clermont-Ferrand I, 2004. http://tel.archives-ouvertes.fr/tel-00661014.
Pełny tekst źródłaTourneur, Isabelle. "Le bore, origine, répartition dans les eaux, inconvénients". Paris 5, 1990. http://www.theses.fr/1990PA05P220.
Pełny tekst źródłaSalinas, Hugo. "Répartition égalitaire des revenus en économie de marché". Paris 12, 2004. https://athena.u-pec.fr/primo-explore/search?query=any,exact,990002198480204611&vid=upec.
Pełny tekst źródłaWould the egalitarian distribution of income work in the market economy? The response is affirmative. We are in measure to erase the economic inequalities such as poverty and unemployment. This ensues from the fact that the economic activity is composed of two elements, the labor process and the economic decision. Through the first, the labor force creates wealth; through the second, society determines the way to distribute and manage it. There are two kinds of economic decisions: private and social. The latter, is the one that favors the obliteration of economic inequalities, it's built upon two stages. The first is composed on the basic income (egalitarian distribution of incomes) and the remuneration for activity. The second concern the collective management of economic funds. This one is exclusively managed by enterprises that are within the norms of the market economy whose sole ownership is the society. The profits and loss of the enterprises are the profits and loss of the society
Guillocheau, Nathalie. "Répartition spatio-temporelle du phytoplancton du bassin d'Arcachon". Aix-Marseille 2, 1988. http://www.theses.fr/1988AIX22007.
Pełny tekst źródłaZucman, Gabriel. "Trois essais sur la répartition mondiale des fortunes". Paris, EHESS, 2013. http://www.theses.fr/2013EHES0071.
Pełny tekst źródłaThis PhD dissertation gathers three essays on the world distribution of wealth. The first chapter, "The Missing Wealth of Nations: Are Europe and the U. S. Net Debtors or net Creditors?" attempts to measure the wealth held by rich individuals in offshore tax havens, using unique Swiss statistics and systematic anomalies in the international investment data of countries. The main finding is that about 8\% of the world's financial wealth of households is he Id offshore, of which at least three-quarters go unrecorded in the official data. Accounting for this missing wealth can turn the world's second largest net debtor, the Eurozone, into a net creditor, and significantly improves the net position of the world's largest net debtor, the U. S. The second chapter, "The End of Bank Secrecy? An Evaluation of the G20 Tax Haven Crackdown", written with Niels Johannesen, investigates whether recent policy initiatives aimed at curbing tax evasion has been effective. In the aftermath of the financial crisis, G20 countries compelled tax havens to sign bilateral tax treaties providing for the exchange of bank information upon request. Based on a rich dataset from the Bank for International Settlements, the chapter shows that the signature of treaties has not provoked any substantial repatriation of wealth onshore but so far has led to a relocation of offshore fortunes to the benefit of the least compliant tax havens. The last chapter, "Capital is Back: Wealth-Income Ratios in Rich Countries, 1700-2010", written with Thomas Piketty, attempts to document and explain the long run evolution of aggregate wealth to income ratios
SADEFO, KAMDEM Jules. "Méthodes analytiques pour le Risque des Portefeuilles Financiers". Phd thesis, Université de Reims - Champagne Ardenne, 2004. http://tel.archives-ouvertes.fr/tel-00009187.
Pełny tekst źródłaPark, Chanyong. "La répartition des revenus, le bien-être social et la redistribution : analyse théorique appliquée au cas de la Corée". Paris, Institut d'études politiques, 1992. http://www.theses.fr/1992IEPP0021.
Pełny tekst źródłaThis dissertation presented the merits to analyse the economic theory of equity, justice and interdependant utility function, in order to explain the phenomenon fo income distribution and redistribution. This dissertation showed, in addition, the empirical test on their theorical analysis. This dissertation started with an examination of the different inequality measurements - continous Lorenz curve, discrete Lorenz curve, generalized Lorenz curve and Gini coefficient -, and proposed a new inequality index based on the fair allocation conception and a new social welfare function. This dissertation also analysed the optimal income tax rate in the conflicting situation between economic classes
Laplante, Jean-Yves. "La répartition optimale de l’espace tablette entre les marques". Mémoire, Université de Sherbrooke, 1988. http://hdl.handle.net/11143/9011.
Pełny tekst źródłaSetti, Larbi. "Modélisation de fours microondes à répartition de puissance imposée". Toulouse, INPT, 1995. http://www.theses.fr/1995INPT016H.
Pełny tekst źródłaCharles, Sébastien André. "Accumulation, répartition et financement : vers une synthèse post-keynésienne". Paris 8, 2003. http://www.theses.fr/2003PA082317.
Pełny tekst źródłaThis thesis is an attempt at knowing whether there exists a link between two fundamental groups in post-keynesian macroeconomics. The first one deals with the concepts of accumulation and distribution and the second one with the concepts of accumulation and its financing. Nevertheless, a difficulty subsists since these theories developed independently, without a global synthesis. Consequently, it is an important aspect of post-keynesian theory which we have to construct. Then, we elaborate a macroeconomic model of synthesis which includes the conclusions of the two post-keynesian groups on accumulation, distribution and financing
Dequiedt, Vianney. "Coalitions et répartition endogène d' information dans les organisations". Toulouse 1, 2002. http://www.theses.fr/2002TOU10070.
Pełny tekst źródłaThis thesis gathers three essays in contract theory. Their common objective is to analyze the formation of coalitions in organizations. The first essay studies in a non-competitive environment the choice of internal structure by an organization. It links this choice to a decision to delegate to intermediate levels of the hierarchy a monitoring task. By this decision, the stakes for vertical collusion are changed. The second essay extend this analysis by considering the influence of a competitive environment on the decision. We study the simultaneous choice of two firms, competing à la Cournot on the product market. The third essay tackles the issue of bidding rings in auction procedures. We study the optimal procedure from the seller's point of view when he cannot prevent collusion among the bidders
Sarradin, Pierre-Marie. "Répartition et évolution du tributylétain dans les sédiments marins". Pau, 1993. http://www.theses.fr/1993PAUU3031.
Pełny tekst źródłaMarchandise, Sandra. "Répartition et composition isotopique de la florencite dans l'océan". Versailles-St Quentin en Yvelines, 2012. http://www.theses.fr/2012VERS0059.
Pełny tekst źródłaThorium (Th), Uranium (U), Rare-Earths (REE) and Hafnium (Hf) are trace elements and isotopes widely used in oceanography to trace particulate matter processes but their bearing phases are still unknown. This work is the first inventory of U-Th-REE-Hf rich phases in DYFAMED suspended particles and deep-sea sediments, in the western Mediterranean Sea. In DYFAMED sediments, zircon stays the major carrier phase of Hf. HREE are carried by xenotime and zircon in sediments, Therefore, they have a strong impact on the Lu/Hf systematic. Monazite, allanite, florencite and apatite are minor carriers of U, Th and LREE in the ocean (also zircon for U). Nevertheless, they have very heterogeneous U/Th ratio which could explain variations of 230Th/232Th ratio observed. Nd isotopic signature measurements shows that, in DYFAMED sediments and water column, inputs from the Var River are the more important compared to Saharan aerosols
Hémery, Fred. "Etude de la répartition dynamique d'activités sur architectures décentralisées". Lille 1, 1994. http://www.theses.fr/1994LIL10101.
Pełny tekst źródłaOlakorede, Asim Abisoye. "Répartition de charges et résistance en conception d'engrenages cylindriques". Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0049.
Pełny tekst źródła[The optimal design of high contact ratio cylindrical gear is principally based on the knowledge one has on the load sharing and load distribution on the gear teeth. The tooth stiffness that intervene in the computation depends naturally on the geometry but also on ether parameters that define the gear geometry (rim, web, etc. The aim of this study was to establish a method of designing cylindrical gears C. A. D. Context. The Finite Prism Method (FPM) , a semi-analytical approach was then developed for a rapid analysis of a 3D problem. It consist of discretizing the transverse section of gear teeth only. The method is highly more economical both in CPU time and in the size of memory disk required than the Finite Element Method. The potential points of contact obtained through a tooth contact kinematic simulation and the influence coefficients obtained through FPM allow us to determine the load sharing and load distribution and perform the stress analysis. The different computer programs developed were assembled in a X-WINDOW and OPENDIALOGUE environment in order to form a coherent software baptized PRINCE (Programme INteractif de Conception d'Engreanges ). A 3D parametric analysis of a spur gear taking into account the tip relief, crowning, pitch error, axes misalignement, rim and web is also presented. ]
Ren, Ruilin. "Utilisation d'information auxiliaire par calage sur fonction de répartition". Paris 9, 2000. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2000PA090041.
Pełny tekst źródłaHoang, Hong Hiep. "L'investissement direct étranger au Vietnam : déterminants et répartition spatiale". Thesis, Clermont-Ferrand 1, 2013. http://www.theses.fr/2013CLF10409.
Pełny tekst źródłaThis thesis uses spatial econometric models to explore the determinants of spatial location of FDI in Vietnam. The first chapter presents the theoretical literature on FDI location, and the stylized facts of the FDI location in Vietnam. The second chapter analyzes the determinants of the spatial location of FDI in ASEAN. Results indicate a significant difference in motivation between the location of extra-ASEAN FDI and intra- ASEAN FDI. The extra-ASEAN FDI are of the form of complex vertical FDI, while intra- ASEAN FDI are of the form of export platform FDI. The third chapter examines the determinants of the spatial location of FDI in the provinces in Vietnam. Results indicate that FDI in a province is not only attracted by the market size, skilled workforce, quality infrastructure, and agglomeration of firms in this province, but also in its neighbors. In addition, labor costs, labor productivity, and national and local policies also play an important role in the spatial location of FDI. The fourth chapter focuses on the role of local institutions on the spatial location of FDI in the provinces in Vietnam. Results show that the quality of local institutions, measured by transparency, political support to the private sector and labor policy, significantly affects the spatial location of FDI in the provinces in Vietnam
Latron, Mathilde. "Adaptation, régression et expansion en limite d’aire de répartition". Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R025/document.
Pełny tekst źródłaOngoing global changes may lead to shifts in the geographical range of biological species. Adaptive evolution and phenotypic plasticity will determine these shifts. The demography of the species and their dispersal capacities will also determine their ability to colonize newly favourable habitats. When geographical distributions are shifting, one can expect a variation in life history traits across the geographic range. Indeed, survival, reproduction and dispersal capacity will determine the success or failure of population establishment and persistence. These traits are thus theoretically expected to be maximized on colonization fronts because low recruitment rates, mate limitation and inbreeding depression, among other factors, can lead to population decline, local extinction, or colonization failure. On colonization fronts, we therefore expect to observe an increase in dispersal capacities and self-fertilization rate, advanced phenology, and higher fertility compared to populations located in the central part of the range. On retraction fronts, mate limitation can also drive selection for increased self-fertilization, and worsening habitat conditions can lead to higher investment in survival as compared to central populations. Understanding the evolution of life history traits in relation to species range dynamics is therefore essential to better understand the future evolution of biodiversity in the Anthropocene. In this context, spatial variations of life history traits were characterized for four plant species that show expansion or retraction fronts in northern France: Miner’ lettuce (Claytonia perfoliata), Danish scurvygrass (Cochlearia danica), Rock samphire (Crithmum maritimum) and Dune pansy (Viola tricolor subsp. curtisii). Variations of life history traits were surveyed from the core to the edge of their geographic ranges by using phenotypic measurements in the natural environment and in the common garden and by analysing the spatial genetic structure for a subset of two species. The geographical range dynamics of these focal species were explained by species-specific factors in interaction with their respective environment. Miner’s lettuce and Danish scurvygrass, both expanding in northern France, showed high propagule pressure on their colonization fronts: while Miner’s lettuce exhibited a higher germination rate at the edge of its range, marginal populations of Danish scurvygrass showed an increase in dispersal capacities. Rock samphire, which is expanding northwards, showed no variation in its life history traits along its geographical range. All populations may show a high capacity for successful colonization and analyses of spatial genetic structure indicated large amount of gene flow among populations via long-distance dispersal events of diaspores. Lastly, the retracting populations of Dune pansy showed an increase in selfing rate that may provide some reproductive assurance. However, their lower reproductive output could threaten their long-term persistence. Altogether, while each species shows variations in life history traits consistent with theoretical predictions, trait variations appeared to be idiosyncratic. This suggested that no common evolutionary syndrome occurred in expanding or receding range edges and that species' responses mostly depend on their specific biology. These results have therefore important implications relevant to conservation biology and to forecasting of geographical range shifts under rapidly changing environments
Assan, Sabina. "Vers une répartition améliorée des sources de méthane anthropique". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLV079/document.
Pełny tekst źródłaMethane has the second largest contribution to global radiative forcing impact of anthropogenic greenhouse gasses. Since 2007 its atmospheric growth rate, after a period of stability, has again been rising rapidly. Anthropogenic methane emissions hold a large mitigation potential, promoting efforts to curb emissions in accordance with the Paris Agreement. However, the considerable uncertainties regarding methane contributors, drivers and emission estimates even at local scales, hinder the effective implementation of methane mitigation strategies. While many approaches have been established to measure total methane fluxes, the partitioning and characterisation of methane sources by region and processes still need to be better constrained.This thesis presents practical methods for characterising different CH4 sources in ambient air measurements at industrial sites, as well as developing more targeted tools. The first chapter focuses on improvements to a CRDS instrument that is commonly deployed for CH4 and δ13CH4 field measurements. We propose a calibration scheme to correct for C2H6 interference on δ13CH4, and enable robust C2H6 measurements. The results of this work are then used to explore the added value gained when implemented on data from a natural gas compressor station, a site where high correlation of C2H6 and CH4 is expected. The second chapter continues the investigation of CH4 sources at the same site; with focus shifted towards the application and comparison of different source apportionment methods from time series analysis based on measurements of multiple species, some co-emitted with CH4. Here the CH4 and Volatile Organic Compounds (VOC) source contributions are explored through the use of isotopic analysis, receptor model analysis (PCA and PMF), metrological data and direct samples of natural gas. The third chapter applies a selection of the developed CH4 source apportionment methods to ambient measurements at biogenic CH4 sites in the Ile de France region and helps complete the survey of the most relevant anthropogenic CH4 sources.This thesis identifies and reports local δ13CH4 source signatures for livestock, wastewater, landfill and natural gas and studies their spatial and temporal variability to aid the constraint of emission inventories. Our findings suggest that source apportionment from δ13CH4 is robust, and adaptable to the majority of sites. Using a combination of tools is ideal for more specific source determination and for an understanding of long and short term variability. The work presented in this thesis offers example applications of these new tools to directed investigations of anthropogenic methane emissions and lays the foundation for future work in this field