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Analyse de méthodes de résolution parallèles d’EDO/EDA raides / Analysis of parallel methods for solving stiff ODE and DAEGuibert, David 10 September 2009 (has links)
La simulation numérique de systèmes d’équations différentielles raides ordinaires ou algébriques est devenue partie intégrante dans le processus de conception des systèmes mécaniques à dynamiques complexes. L’objet de ce travail est de développer des méthodes numériques pour réduire les temps de calcul par le parallélisme en suivant deux axes : interne à l’intégrateur numérique, et au niveau de la décomposition de l’intervalle de temps. Nous montrons l’efficacité limitée au nombre d’étapes de la parallélisation à travers les méthodes de Runge-Kutta et DIMSIM. Nous développons alors une méthodologie pour appliquer le complément de Schur sur le système linéarisé intervenant dans les intégrateurs par l’introduction d’un masque de dépendance construit automatiquement lors de la mise en équations du modèle. Finalement, nous étendons le complément de Schur aux méthodes de type "Krylov Matrix Free". La décomposition en temps est d’abord vue par la résolution globale des pas de temps dont nous traitons la parallélisation du solveur non-linéaire (point fixe, Newton-Krylov et accélération de Steffensen). Nous introduisons les méthodes de tirs à deux niveaux, comme Parareal et Pita dont nous redéfinissons les finesses de grilles pour résoudre les problèmes raides pour lesquels leur efficacité parallèle est limitée. Les estimateurs de l’erreur globale, nous permettent de construire une extension parallèle de l’extrapolation de Richardson pour remplacer le premier niveau de calcul. Et nous proposons une parallélisation de la méthode de correction du résidu. / This PhD Thesis deals with the development of parallel numerical methods for solving Ordinary and Algebraic Differential Equations. ODE and DAE are commonly arising when modeling complex dynamical phenomena. We first show that the parallelization across the method is limited by the number of stages of the RK method or DIMSIM. We introduce the Schur complement into the linearised linear system of time integrators. An automatic framework is given to build a mask defining the relationships between the variables. Then the Schur complement is coupled with Jacobian Free Newton-Krylov methods. As time decomposition, global time steps resolutions can be solved by parallel nonlinear solvers (such as fixed point, Newton and Steffensen acceleration). Two steps time decomposition (Parareal, Pita,...) are developed with a new definition of their grids to solved stiff problems. Global error estimates, especially the Richardson extrapolation, are used to compute a good approximation for the second grid. Finally we propose a parallel deferred correction
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Os créditos tributários e seus impactos nas carteiras de crédito dos bancos no Brasil frente à entrada em vigor das regras de Basileia IIIHelpe, Ronaldo Medrado 11 December 2017 (has links)
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Previous issue date: 2017-12-11 / A iminência da entrada em vigor das regras estabelecidas pelo acordo da Basileia III, motivado pela crise do subprime em 2009, desperta preocupação ao redor do mundo, inspirando inúmeros estudos que tentam antecipar potenciais efeitos desta regulamentação sobre a economia (BERROSPIDE e EDGE, 2010). O Brasil vive uma das piores recessões de sua história e as provisões para créditos ruins nos balanços dos bancos se avolumam, gerando um aumento do estoque de créditos tributários. Em linha com diversos estudos já realizados, este trabalho explorou efeitos decorrentes da implantação do acordo da Basileia III em relação ao capital mínimo regulatório exigido, com o diferencial de dar ênfase ao impacto da exclusão dos créditos tributários da base de capital dos bancos. O objetivo foi identificar se a restrição de capital trazida por tais deduções, no âmbito do novo acordo, poderia impactar o volume de créditos concedidos pelos bancos, impactando, portanto, o processo de recuperação econômica do Brasil. Verificou-se, através de uma pesquisa exploratória, que abordou uma amostra relevante de 38 bancos, que os avanços dos ajustes prudenciais de créditos tributários terão alto impacto sobre a base de capital das instituições financeiras. Tais deduções, geraram impactos em 28 bancos da amostra, chegando a representar mais de 100% da necessidade agregada de capital principal e 59% da necessidade agregada de capital nível 1 dos bancos analisados. Do ponto de vista de influência das deduções dos créditos tributários sobre as carteiras de crédito dos bancos, foi possível constatar que o impacto tende a ser pequeno, chegando a 1,5% de redução sobre o total da carteira de crédito dos bancos analisados. Essa conclusão, apesar de parecer incoerente à primeira vista, justifica-se pela capacidade dos bancos em atrair mais capital, em função de suas rentabilidades acima do custo de capital próprio. Essa análise nos permitiu confirmar a relevância dos créditos tributários das instituições financeiras sobre suas políticas de gestão de capital e verificar que as deduções de créditos tributários, apesar de representar restrições importantes de capital, não deverão impactar de forma relevante o crescimento das carteiras de crédito no sistema financeiro brasileiro. / The imminence of fully application of the rules established by Basel III, motivated by the subprime crisis in 2009, arouses concern around the world, motivating several papers trying to anticipate potential effects of this regulation (BERROSPIDE e EDGE, 2010). Brazil is facing one of the worst recessions in its history and the increase in provisions for bad credits, led to an increase in tax credits in the banks' balance sheets in Brazil. Aligned with several studies, this research explored the effects arising from the implementation of Basel III agreement in relation to minimum regulatory capital, with the differential of emphasizing the impact of the exclusion of tax credits from the capital base of banks. The objective was to identify if the restriction of capital brought by Tax Credits under the new agreement could impact the volume of credits granted by the banks, thus impacting the process of economic recovery in Brazil. It was verified through a relevant sample of 38 banks that tax credits will have a high impact on the banks' capital base. These deductions generated impacts on 28 sample banks, accounting for more than 100% of the aggregate principal capital requirement and 59% of the aggregate capital requirement of the banks analyzed. From the point of view of the influence of tax credit deductions on banks' credit portfolios, it was possible to verify that the impact tends to be small, reaching a reduction of 1.5% on the total loan portfolio of the banks analyzed. This conclusion, despite seeming at first glance to be inconsistent, is justified by the ability of banks to attract more capital, due to their profitability above the cost of equity. This analysis allowed us to confirm the relevance of tax credits of financial institutions on their capital management policies and to verify that deductions of tax credits, despite representing significant capital constraints, should not have a significant impact on the growth of credit portfolios in Brazil.
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Essays on matching and preference aggregationBonkoungou, Somouaoga 02 1900 (has links)
No description available.
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Facilities Management: How Public Leadership is Responding to CrisisSmith, Rebecca Jane 25 October 2017 (has links)
This research presents the results of a qualitative and quantitative investigation to understand the challenges of public sector facilities management and maintenance to include the negative impact of deferred maintenance, it’s history, the current industry practices and the potential to reverse the negative impact of the current trend.
History has been known to speak loudly, and with accuracy relative to the expansion of public facilities and the challenge to maintain them. The challenge to keep pace with the growing population and the ever-changing requirements for contemporary designs are felt in every sector of our public facilities. Regardless, we, the public trust that those responsible are managing these assets effectively and efficiently. Research indicates that this doesn’t appear to be the case.
This study serves as a measurement against the historical performance of public facilities management practice. There have been decades of growth in public assets. During that time, innovation within operational practice and technology offer new opportunities for organizations to address issues of efficiency that translate directly in a measure of effectiveness. Given the continued outcry for additional funding, it seems that there are challenges that continue to exist despite the innovation offered. This study focuses on those challenges. Further analysis, based on successful models of public facilities management, provides insights as to what practices, if adopted, may drive the lesser achieving programs toward greater effectiveness.
This paper also includes the results of a study that focuses on the current practices of public facilities management programs. The intent is to identify elements that either support or detract from efficiently operated, effective facilities departments. Given the nature of this industry, both objective and subjective elements were addressed. Objectively the organizational hierarchy and the associated communications pathways were identified. Subjectively, the lifecycle of the facilities mission was dissected and discussed throughout an interview process. Fifteen specified data points were addressed, which included questions related to accountability, effective communication, data driven program development, allocation of resources, documentation of work performed, continuous training and education and the use of technology.
In order to reverse the declining momentum, we must first identify the most common areas that challenge facilities managers and understand how they currently address those challenges. This research will address the following questions:
What do facilities managers perceive to be the greatest obstacles to ensuring their facilities are properly maintained?
What factors do facilities mangers perceive to be the greatest challenge to ensuring sufficient resources are allocated to current maintenance?
To what degree do facilities managers perceive that more effective communications would positively impact the effectiveness of facilities management and maintenance.
The results of this research presents a comprehensive understanding of the challenges that face public sector facilities leadership teams, the history and creation of excessive deferred maintenance and finally, future opportunities that identifies best practices and presents an artifact that reflects a means to resolve those deficiencies identified within the current facilities management environment.
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Smluvní autonomie při konstrukci druhů akcií a její limity / Contracting autonomy in construction of classes of shares and its limitsKristanová, Lenka January 2016 (has links)
The theme of this diploma thesis is "Contracting autonomy in construction of classes of shares and its limits". Its aim is to answer the question to what extent is the contracting autonomy of shareholders limited, when it comes to construction of classes of shares. The answer is being found by means of a negative analysis that lists both statutory and case-law based limits that restrict that autonomy. It also presents legal consequences, from which suffer those classes of special shares that collide with the statutory provisions and the constructions of rights that are questionable or vague. This diploma thesis comprises of two chapters. Whereas the first one deals with the contracting autonomy in construction of classes of shares and its limits in Czech law, the second one do likewise in German law. The first chapter is divided into two sections. The first part describes a security and shares in general trying to bring out those of their specifics that are subject of further discussion of limits of the contracting autonomy in construction of classes of shares and particular classes of shares. The second section of the first chapter has two subsections. The first one addresses statutory and case-law based limits, which restrict the contracting autonomy of shareholders in construction of special...
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Účetní a daňové odpisy dlouhodobého hmotného a nehmotného majetku / The accounting depreciation and the tax depreciation of tangible and intangible fixed assetsVláčilová, Lenka January 2009 (has links)
Thesis summarizes globally the issue of the accounting depreciation and the tax depreciation of tangible and intangible fixed assets in the Czech Republic. The different meaning of the accounting depreciation or the tax depreciation for the accounting entity is pointed out, the impact of the selected method of depreciation on the profit/tax base is discussed as well as the following issue of the deferred tax. Additionally, the different interpretation of some area of the accounting depreciation of the International Financial Reporting Standards is compared with the point of view of the Czech legislation. In the area of the tax depreciation the different concept called investment pool used in the economies of other countries is stated. Finally, the intended changes in the accounting legislation and the tax legislation in the following years are mentioned.
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Tvorba grafické knihovny pro zásuvné moduly VST / Creation of the Graphic Library for VST Plug-InsDufka, Filip January 2019 (has links)
Master‘s thesis covers use of graphical user interface in audio plug-ins. In first part structure and rendering techniques of audio plug-ins graphical libraries are described. Their efficiency and their way of memory utilization is questioned. Next part puts these techniques in comparison with the state of the art methods used in computer graphics and gaming industry. Their possible use in audio graphical interafaces is analyzed. In the following part, thesis finds solutions to uneffective methods in frequently used situations by presenting deferred shading into audio parameter editor with the goal of photorealistic rendering. Second introduced technique of „Knob Normal Maps“ reduces number of images needed for rendering of turning knob from hundereds to six with comparable results. Goal of diploma thesis was to create graphical library. Graphical library with name RealBox was created, and introduced techniques are the core features. Library reduces work needed to achieve graphical user interfaces for 2D and 3D cases of use. Full class and method documentation for RealBox library was assembled. Library was tested during creation of three VST plugins, with different approaches and emphasis on quick work and fine rendering. Graphical library offers new, faster way of creating audio plug-in interfaces.
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Benchmark pro zařízení s podporou OpenGL ES 3.0 / Benchmark for OpenGL ES 3.0 DevicesKimer, Tomáš January 2014 (has links)
This thesis deals with the development of benchmark application for the OpenGL ES 3.0 devices using the realistic real-time rendering of 3D scenes. The first part covers the history and new features of the OpenGL ES 3.0 graphics library. Next part briefly describes selected algorithms for the realistic real-time rendering of 3D scenes which can be implemented using the new features of the discussed library. The design of benchmark application is covered next, including the design of online result database containing detailed device specifications. The last part covers implementation on Android and Windows platforms and the testing on mobile devices after publishing the application on Google Play. Finally, the results and possibilites of further development are discussed.
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NIC 12 Impuesto a las ganancias y su impacto tributario y financiero en las empresas que brindan servicios de salud ocupacional en Lima Norte, Año 2017Molina Jimenez, Juan Alexander, Yarasca Rivera, David Dimas 31 March 2019 (has links)
La presente investigación de tesis tiene como objetivo determinar el impacto tributario y financiero de la NIC 12 Impuesto a las Ganancias en las empresas que brindan servicios de salud ocupacional en Lima Norte, año 2017, para ello es indispensable realizar la identificación de impuesto corriente, impuesto diferidos, reconocimiento, medición y presentación del impuesto a las ganancias. La investigación se desarrollará en cinco capítulos:
Capítulo I Marco teórico, se investigan fuentes primarias donde se desarrollan conceptos básicos de la NIC 12 Impuesto a las Ganancias, antecedentes, definiciones, evolución, objetivo, alcance, reconocimiento, medición, presentación e información a revelar; el impacto tributario y financiero y la relación existente; también se analiza el sector de servicios de salud ocupacional. Capitulo II Plan de investigación, se formula la situación problemática de la tesis, el problema principal, problemas específicos, objetivo general y objetivos específicos, la hipótesis principal e hipótesis específicas. Capitulo III Metodología de la investigación, se define la población y muestra para realizar nuestras investigaciones cuantitativa y cualitativa. Capitulo IV Desarrollo de la investigación, donde se realizó la investigación a través de la entrevista a profundidad, cuestionario y el desarrollo del caso práctico. Capítulo V Análisis de Resultados, se analizan los resultados de los instrumentos obtenidos y se desarrolla un caso práctico que lo ejemplifica. Finalmente se validará la hipótesis general y las especificas en base a los resultados obtenidos en las tablas cruzadas y el CHI cuadrado. / The objective of this thesis research is to determine the tax and financial impact of IAS 12 Income Taxes in companies that provide occupational health services in Lima Norte, 2017, for this it is essential to carry out the identification of current tax, tax deferred taxes, recognition, measurement and presentation of income tax. The research work is divided into five chapters that are:
Chapter I Theoretical framework, research is carried out through primary sources where basic concepts of international financial reporting standards (IFRS), background information, definitions, evolution, objective, scope, recognition, measurement, presentation and disclosures are developed. IAS 12 Income Tax; the tax and financial impact and the existing relationship; an analysis of the occupational health services sector. Chapter II Research plan, the problematic situation of the thesis is formulated, the main problem, specific problems, general objective and specific objectives, the initial hypothesis and specific hypotheses. Chapter III Research methodology, the population was defined, the sample to perform quantitative and qualitative research. Chapter IV Development of the research, where the research was carried out through the in-depth interview, questionnaire and the development of the practical case. Chapter V Analysis of Results, the analysis of the obtained instruments and practical case is made. Concluding with the validation of the general and specific hypothesis based on the results obtained in the crossed tables and the square CHI. / Tesis
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Deferred Shading / Deferred ShadingStarý, Petr January 2009 (has links)
Work deals with design and implementation a tutorial for demonstration deferred shading technique and its possibilities. It explains lighting and shading principles in intuitive and interactive way. Deferred shading is a technique which determines pixel color after the geometry rasterization of the entire scene. In other words the processing of geometry does not interfere with the shading process.
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