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京都大学 / 新制・課程博士 / 博士(工学) / 甲第23927号 / 工博第5014号 / 新制||工||1783(附属図書館) / 京都大学大学院工学研究科合成・生物化学専攻 / (主査)教授 松田 建児, 教授 杉野目 道紀, 教授 生越 友樹 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM

The purpose of this paper is to describe the mechanization of the basic equations of motion for the performance and maneuver characteristics of an airplane with some simplifications which render solutions more practicable. The results of a study made to program these equations for calculation by the IBM MODEL 650 digital computer are presented as well as the steps to be taken in using this method of calculation.

This paper is an extension of various projects that the writer has been associated with at Chance Vought Aircraft, Incorporated.

Thesis (MEng) -- Stellenbosch University, 2014. / ENGLISH ABSTRACT: The Francou and Rodier (1967) empirical approach uses the original concept of envelope curves for the definition of the regional maximum flood (RMF). Kovacs (1980) adopted the Francou and Rodier empirical flood calculation method and applied it to 355 catchments in South Africa. He revised his study in 1988 to also include the southern portions of the Southern Africa subcontinent. No method other than the Francou and Rodier empirical flood approach in the reviewed literature was found to be suitable for the purpose of this study. Therefore the Francou and Rodier empirical approach, as applied by Kovacs in 1988, was reapplied and used in this study to update the RMF for Lesotho. Maximum recorded flood peaks were derived from annual maximum time series and an up to date catalogue of flood peaks for 29 catchments was compiled for Lesotho. The maximum recorded flood peaks were then plotted on the logarithmic scale against their corresponding catchment areas. There are 3 major river systems that divide Lesotho into hydrologically homogenous basins. Envelope curves were drawn on the upper bound of the cloud of plotted points for these 3 river basins. These envelope curves represent the maximum flood peaks that can reasonably be expected to occur within the respective river basins in Lesotho. / AFRIKAANSE OPSOMMING: Francou en Rodier (1967) se empiriese benadering maak gebruik van die oorspronklike konsep van boonste limiet kurwes vir die definisie van die streeks maksimum vloed (SMV). Kovacs (1980) het die Francou en Rodier empiriese vloed berekening metode toegepas op 355 opvanggebiede in Suid-Afrika. Hy hersien sy studie in 1988 om ook die suidelike gedeeltes van die Suider-Afrikaanse subkontinent in te sluit. Geen ander metode as die Francou en Rodier empiriese vloed benadering is in die literatuur gevind wat as geskik aanvaar kan word vir die doel van hierdie studie nie. Daarom is die Francou en Rodier empiriese benadering, soos toegepas deur Kovacs in 1988, weer in hierdie studie toegepas en gebruik om die SMV metode vir Lesotho op te dateer. Maksimum aangetekende vloedpieke is verkry vanuit jaarlikse maksimum tyd-reekse en ʼn opgedateerde katalogus van vloedpieke vir 29 opvanggebiede saamgestel vir Lesotho. Die maksimum aangetekende vloedpieke is grafies aangetoon op logaritmiese skaal teenoor hul opvanggebiede. Daar is 3 groot rivierstelsels wat Lesotho in hidrologiese homogene gebiede verdeel. Boonste limiet kurwes is opgestel om die boonste grens van die gestipte punte vir hierdie 3 gebiede aan te toon. Hierdie krommes verteenwoordig die maksimum vloedpieke wat redelikerwys verwag kan word om binne die onderskeie rivierstelsels in Lesotho voor te kan kom.

The main aim of the thesis is the recalculation of cost for services provided in the Institute of Forensic Medicine in University Hospital Hradec Králové. The theoretical part includes, inter describtion of each calculation methods, comparation of medical services "market" with a purely market-base business sector. Practical parts consists of calculation of cost and subsequent comaparation with the values valid since 2005. Newly calculated cost should determine the actual amount of payment for services provided.

Les mesures de réactivité par la technique d'oscillation, comme celles effectuées dans le réacteur Minerve, permettent de tester de nombreux paramètres neutroniques sur des matériaux, des combustibles ou des isotopes spécifiques. Généralement, les effets attendus sont très faibles, tout au plus de l'ordre de la dizaine de pcm. La modélisation de ces expériences doit donc être particulièrement précise, afin d'obtenir un retour fiable et précis sur les paramètres ciblés. En particulier, les biais de calcul doivent être clairement identifiés, quantifiés et maîtrisés afin d'obtenir des informations pertinentes sur les données nucléaires de base. L'enjeu de cette thèse est le développement d'un schéma de calcul de référence, dont les incertitudes sont clairement identifiées et quantifiées, permettant l'interprétation des mesures par oscillation. Dans ce document plusieurs méthodes de calcul de ces faibles effets en réactivité sont présentées, basées sur des codes de calculs neutroniques déterministes et/ou stochastiques. Ces méthodes sont comparées sur un benchmark numérique, permettant leur validation par rapport à un calcul de référence. Trois applications sont ici présentées dans le détail : une méthode purement déterministe utilisant la théorie des perturbations exacte pour la qualification des sections efficaces des principaux produits de fission en REP, dans le cadre d'études sur l'estimation de la perte du réactivité du combustible au cours du cycle ; une méthode hybride, basée sur un calcul stochastique et la théorie des perturbations exacte, permet d'obtenir un retour précis sur les données nucléaires de bases d'isotopes, dans notre cas l'241Am; et enfin, une troisième méthode, reposant sur un calcul perturbatif Monte Carlo, est utilisée pour une étude de conception. / Reactivity measurements by the oscillation technique, as those performed in the Minerve reactor, enable to access various neutronic parameters on materials, fuels or specific isotopes. Usually, expected reactivity effects are small, about ten pcm at maximum. Then, the modeling of these experiments should be very precise, to obtain reliable feedback on the pointed parameters. Especially, calculation biases should be precisely identified, quantified and reduced to get precise information on nuclear data. The goal of this thesis is to develop a reference calculation scheme, with well quantified uncertainties, for in-pile oscillation experiments. In this work are presented several small reactivity calculation methods, based on deterministic and/or stochastic calculation codes. Those method are compared thanks to a numerical benchmark, against a reference calculation. Three applications of these methods are presented here: a purely deterministic calculation with exact perturbation theory formalism is used for the experimental validation of fission product cross sections, in the frame of reactivity loss studies for irradiated fuel; an hybrid method, based on a stochastic calculation and the exact perturbation theory is used for the readjustment of nuclear data, here 241Am; and a third method, based on a perturbative Monte Carlo calculation, is used in a conception study.

Torque and drag (T&D) modeling is regarded as extremely helpful in well planning because it helps to predict and prevent drilling problems that might occur during the drilling process. Although T&D software has existed since the 1990s, some confusion still exists over the validity of the models that are used to characterize drilling operations, especially as we extend the length of modern horizontal wells. Moreover, it seems that only minimal improvements have been made to the underlying mathematical models over the last two decades. For normal planning on extended-reach and other challenging wells, T&D modeling provides a guideline for performance. Better modeling is especially important in complex three-dimensional wellbores. To optimize well design, T&D modeling needs to be incorporated into the planning of each well. The following factors should be evaluated: - Optimizing the well planning design - Adapting casing or tubular designs - Changing annulus fluids; for example, oil-based mud lubricates are better than water-based mud - Adjusting operating drilling processes such as reducing sliding distances or rotating to the bottom This project develops software that will give more accurate 3D T&D calculations. Moreover, this research is also widely beneficial in handling wellbore tortuosity which is explained in detail in the text. The new software will optimize the wellbore path and assist significantly in torque and drag calculation in well design.

Torque and drag (T&D) modeling is regarded as extremely helpful in well planning because it helps to predict and prevent drilling problems that might occur during the drilling process. Although T&D software has existed since the 1990s, some confusion still exists over the validity of the models that are used to characterize drilling operations, especially as we extend the length of modern horizontal wells. Moreover, it seems that only minimal improvements have been made to the underlying mathematical models over the last two decades. For normal planning on extended-reach and other challenging wells, T&D modeling provides a guideline for performance. Better modeling is especially important in complex three-dimensional wellbores. To optimize well design, T&D modeling needs to be incorporated into the planning of each well. The following factors should be evaluated: - Optimizing the well planning design - Adapting casing or tubular designs - Changing annulus fluids; for example, oil-based mud lubricates are better than water-based mud - Adjusting operating drilling processes such as reducing sliding distances or rotating to the bottom This project develops software that will give more accurate 3D T&D calculations. Moreover, this research is also widely beneficial in handling wellbore tortuosity which is explained in detail in the text. The new software will optimize the wellbore path and assist significantly in torque and drag calculation in well design.

The Coarse-Mesh Transport Method (COMET) is a method developed by the Computational Reactor and Medical Physics Group at Georgia Tech. Its original application was neutron transport for nuclear reactor modeling. COMET has since been shown to be effective for coupled photon-electron transport calculations where the goal is to determine the energy deposition of a photon beam. So far COMET can simulate a mono-directional, mono-energetic, spatially-flat photon beam. The goal of this thesis will be to extend COMET by adding a generalized source treatment. The new source will be able to simulate beams that vary in intensity as a function of position, angle, and energy. EGSnrc will be used to verify the accuracy of the new method for 3D photon kerma calculations.