Dissertations / Theses on the topic 'Extrapolators'

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1

Snow, Nicholas Harrer. "Numerical extrapolations for retention time prediction in capillary gas chromatography." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-170350/.

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2

Hackett-Jones, E. J. "The role of chiral symmetry in extrapolations of lattice QCD results to the physical regime /." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09SM/09smh121.pdf.

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3

Kettle, Anthony J. "Extrapolations of the flux of dimethylsulfide, carbon monoxide, carbonyl sulfide, and carbon disulfide from the oceans." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0012/NQ59143.pdf.

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4

O'Brien, Eileen M. "Climate and woody plant species richness : analyses based upon southern Africa's native flora with extrapolations to subsaharan Africa." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670313.

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5

Cupitt, Catherine Anne. "Space opera: a hybrid form of science fiction and fantasy." Thesis, Curtin University, 2004. http://hdl.handle.net/20.500.11937/1082.

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This thesis considers space opera as a hybrid form of science fiction and fantasy.“Falling Stars,” the creative component which includes fantasy, space opera and science fiction stories, constitutes a spectrum of speculative fiction. In order to illustrate the similarities and difference between the genres represented in the spectrum, I focus on the central figure of the alien other and the ways in which such a figure can be gendered and embodied. The space opera novella combines motifs of both fantasy and science fiction within the figure of the cyborg, Orlando, who is transgendered and hyperchangeably embodied.The exegesis offers a theoretical context through which to view the creative work. I argue that space operas are melodramatic adventure stories, which operate as a hybrid form of science fiction and fantasy, using the non-realist expectations inherent in both, but mixing the extrapolations and icons of science fiction with the self-consistent but unbelievable discontinuities of fantasy. I also consider space opera’s tendency to exhibit a conservative, unexamined colonialistic imperative, with the attendant assumptions that create a potential for feminist subversion.
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6

IRIBARNE, CHRISTELLE. "N-dealkylations oxydatives de la methadone et de la buprenorphine. Identification de l'isoforme cytochrome p450 impliquee. Extrapolations aux interactions medicamenteuses." Brest, 1998. http://www.theses.fr/1998BRES2011.

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La methadone et la buprenorphine sont utilisees dans les programmes de substitution de dependances aux opiaces. Neanmoins, pour permettre un traitement optimum et ainsi eviter des rechutes vers la toxicomanie, il est important de connaitre la nature des enzymes responsables de leurs biotransformations, et ainsi les interactions medicamenteuses previsibles. L'etude in vitro de leurs dealkylations par des preparations microsomales hepatiques humaines a permis d'etablir que le cytochrome p450 3a4 catalyse majoritairement ces reactions. La demarche consiste en cinq etapes : 1. Determination des activites dans un panel de preparations microsomales, 2. Correlations avec d'autres activites p450-dependantes, 3. Action d'inhibiteurs chimiques specifiques, 4. Immuno-inhibition par anticorps polyclonaux anti-p450 3a4, 5. Capacite metabolique de p450 humains heterologues. Nous avons ensuite montre que la methadone n'est pas un inhibiteur suicide des p450, mais un inhibiteur reversible du p450 3a4. Le cytochrome p450 3a4 est repressible et inductible par de nombreux xenobiotiques. De plus, il est implique dans le metabolisme d'environ 50% des medicaments presents sur le marche. Il en resulte que des interactions medicamenteuses sont probables. Nous avons etabli in vitro l'existence d'interactions entre ces substituts et la fluvoxamine ou la fluoxetine (inhibiteurs de la recapture de la serotonine), et avec le ritonavir, l'indinavir ou le saquinavir (inhibiteurs de la protease vih). Nous avons extrapole ces resultats a la situtation in vivo en appliquant un modele mathematique faisant intervenir le type d'interaction, les constantes cinetiques de chaque produit et les concentrations plasmatiques. Le ritonavir inhibe tres fortement le metabolisme des deux substituts, et la fluvoxamine inhibe legerement la demethylation de la methadone. Dans la derniere partie, nous avons verifie que le metabolisme de la methadone par les p450 fait intervenir ses deux enantiomeres.
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7

Silva, André Chicrala Amaral. "Evolution of active regions based on solar-surface magnetic flux observations and coronal magnetic fields extrapolations: a case-study of NOAA 12443." Instituto Nacional de Pesquisas Espaciais (INPE), 2017. http://urlib.net/sid.inpe.br/mtc-m21b/2017/07.07.18.24.

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The solar surface is often populated by Active Regions (ARs) that are known for their intense magnetic field when compared to the solar quiet regions. During their evolution the ARs may give rise to energetic events such as flares or Coronal Mass Ejections (CMEs). In this work, data collected from the instruments Helioseismic and Magnetic Imager (HMI) and Hinode were used to measure the magnetic field in the Photosphere, using Stokes profiles, and to extrapolate those magnetic field vectors to the layers above: Chromosphere and Corona whose magnetic field cannot be directly measured with the available equipment and techniques. Since the behaviour of a plasma is strongly dependent on the magnetic field the results were applied to study the behaviour of the active region NOAA 12443. The results include maps of the Stokes parameters measured over NOAA 12443, the velocity fields along the Line Of Sight, a study of the behaviour of the currents and helicity of the region, the energy evolution of NOAA 12443 using a linear force free approach and a scenario studying some of the possible causes of the flaring activity and if this flare was an sympathetic event.
A superfície solar é comumente populada por Regiões Ativas (ARs) que são conhecidas por seu intenso campo magnético quando comparadas com as regiões de Sol quieto. Durente sua evolução, as ARs podem dar origem a eventos energéticos como flares ou ejeções coronais de massa (CMEs).Nesse trabalho, dados coletados dos instrumentos Helioseismic and Magnetic Imager (HMI) e Hinode forão usados para medir o campo magnético na fotosfera, usando os perfis de Stokes, e para extrapolar essas medidas de vetor campo magnético para as camadas acima: a Chromosfera e a Coroa onde esses campos magnéticos não podem ser diretamente medidos com as técnicas e aparatos disponíveis para este estudo. Como o comportamento de um plasma é fortemente dependente do campo magnético esses resultados forão aplicados para estudar o comportamento da região ativa NOAA 12443. Os resultados incluem mapas dos parâmetros de Stokes da região NOAA 12443, os campos de velocidade ao longo da linha de visada, um estudo do comportamento de correntes e helicidade da região, um estudo da evolução energética da NOAA 12443 usando uma abordagem linear livre de forças e um cenário que estuda algumas das possíveis causas da atividade de flare e se o flare em questão foi um evento simpático.
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8

Ribot, Magali. "Étude théorique de méthodes numériques pour les systèmes de réaction-diffusion; application à des équations paraboliques non linéaires et non locales." Phd thesis, Université Claude Bernard - Lyon I, 2003. http://tel.archives-ouvertes.fr/tel-00004563.

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On s'intéresse dans cette thèse à l'étude de méthodes numériques pour les systèmes de réaction-diffusion. Tout d'abord, on étudie le schéma par régularisation du résidu et ses extrapolations; ce schéma introduit un préconditionneur en espace lors de la discrétisation en temps. On prouve la stabilité en norme usuelle et la convergence en norme d'énergie de cette méthode et on l'applique au préconditionnement de méthodes spectrales par des méthodes d'éléments finis. Cette application nécessite le calcul d'asymptotiques précises des polynômes de Legendre et de leurs extrema. On prouve aussi la convergence et l'ordre deux d'une méthode de splitting semi-discrétisée en temps pour les systèmes de réaction-diffusion, l'approximation de Peaceman-Rachford. Enfin, on applique ces méthodes à la simulation d'une équation parabolique non linéaire pour modéliser la croissance de grains et à une équation parabolique non locale venant de la mécanique statistique et modélisant les systèmes autogravitants de fermions.
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9

Graves, Robert Wilson. "Modeling seismic wave propagation using paraxial extrapolators." Thesis, 1991. https://thesis.library.caltech.edu/6283/1/Graves_rw_1991.pdf.

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The development of a paraxial extrapolation system to simulate seismic wave field propagation in complex three-dimensional (3-D) media results in a practical approach to address modeling problems that require large computer memory. The paraxial approach applies to wave propagation problems in which most of the energy is traveling within a restricted angular cone about a principle axis of the problem. To set up the paraxial system, the equations of motion are initially cast as a first-order extrapolation system. Approximating the exact one-way extrapolation operator for this system with a truncated series expansion yields a sequence of paraxial extrapolation operators. Using the second-order operator results in a paraxial system which is accurate for propagation angles out to 60° with respect to the extrapolation axis. The acoustic formulation of this system produces excellent results as compared to a full wave field calculation. Formulating an appropriate system for the elastic case is more difficult due to the coupling between P and S energy. Specifying media variations as small perturbations to a homogeneous reference medium leads to a useful formulation of the paraxial system for the 2-D elastic case. Using the acoustic system to model path effects for local earthquakes recorded at two southern California stations indicates the strong influence that the 3-D crustal basins of this region have on the propagation of seismic energy. Although the simulation tracks only acoustic waves, the method is capable of modeling effects due to focusing, diffraction and the generation of multiple reflections and refractions. The modeling results show that the 3-D structure of the Los Angeles, San Fernando and San Gabriel basins create strong patterns of focusing and defocusing for propagation paths coming into the stations located at Pasadena (PAS) and the University of Southern California (USC). These simulations compare well with earthquake data recorded at both stations.
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10

Nananukul, Soracha. "Extrapolations in stochastic discrete-event systems." 1996. https://scholarworks.umass.edu/dissertations/AAI9639010.

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We consider an alternative approach for computing the values of performance functions in complicated DES's. The idea is to first compute the values of auxiliary terms, which are related to the performance function in some way. And then we use the values of the auxiliary terms to approximate the values of the performance function in the complicated system. This is done by finding an appropriate function which can use the values of the auxiliary terms to extrapolate the values of the performance function. We consider 3 kinds of extrapolation: (1) Pade approximation, (2) multipoint Pade approximation, (3) sequence transformation. We also consider the quasi-Monte Carlo method for regenerative simulation which will guarantee deterministic bounds needed in extrapolation.
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11

Decloedt, Thomas. "On simple global extrapolations of topography-catalyzed mixing estimates." Thesis, 2006. http://hdl.handle.net/10125/20799.

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12

Hackett-Jones, E. J. (Emily Jane). "The role of chiral symmetry in extrapolations of lattice QCD results to the physical regime." 2001. http://web4.library.adelaide.edu.au/theses/09SM/09smh121.pdf.

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13

Hackett-Jones, E. J. (Emily Jane). "The role of chiral symmetry in extrapolations of lattice QCD results to the physical regime." Thesis, 2001. http://hdl.handle.net/2440/122186.

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14

Kettle, A. James. "Extrapolations of the flux of dimethylsulfide, carbon monoxide, carbonyl sulfide, and carbon disulfide from the oceans /." 2000. http://wwwlib.umi.com/cr/yorku/fullcit?pNQ59143.

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Thesis (Ph. D.)--York University, 2000. Graduate Programme in Chemistry.
Typescript. Includes bibliographical references (leaves 370-416). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pNQ59143
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15

Шайтанова, Вікторія Віталіївна. "Планування та прогнозування зовнішньоекономічної діяльності металургійного підприємства ПАТ «Запоріжсталь»." Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/1355.

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Шайтанова В. В. Планування та прогнозування зовнішньоекономічної діяльності металургійного підприємства ПАТ "Запоріжсталь" : кваліфікаційна робота магістра спеціальності 073 "Менеджмент" / наук. керівник А. С. Чкан. Запоріжжя : ЗНУ, 2020. 129 с.
UA : Кваліфікаційна робота магістра: 129 с., 8 рис., 42 табл., 3 додатки, 61 джерело. Предметом дослідження є сукупність теоретичних, методичних і практичних аспектів планування та прогнозування зовнішньоекономічної діяльності підприємства. Об’єктом дослідження є система планування та прогнозування металургійного підприємства ПАТ «Запоріжсталь». Мета роботи – розробка пропозицій щодо підвищення ефективності системи планування на основі прогнозування зовнішньоекономічної діяльності ПАТ «Запоріжсталь». Специфіка роботи полягає у детальному аналізі процесів планування на підприємстві з урахуванням постійних змін в економічних процесах зовнішнього середовища, а також аналіз динаміки здійснення зовнішньоекономічної діяльності підприємством за попередні періоди і планування подальшої діяльності на основі складених прогнозів. Під час написання роботи було визначено поняття планування та прогнозування зовнішньоекономічної діяльності підприємства, з’ясовано особливості механізму їх здійснення, досліджено сутність та зміст їх основних методів, а також розглянуті класифікації їх видів і типів; обґрунтовано методику визначення ефективності планування та прогнозування ЗЕД в умовах невизначеності та інтернаціоналізації бізнесу. Також, була проведена організаційно-економічна характеристика підприємства ПАТ «Запоріжсталь», досліджено організацію його зовнішньоекономічної діяльності і проведена діагностика системи планування та прогнозування ЗЕД підприємства. У третій частині роботи здійснено прогнозування зовнішньоекономічної діяльності ПАТ «Запоріжсталь», розроблено рекомендації щодо напрямків вдосконалення системи планування підприємства і запропоновано шляхи підвищення ефективності системи планування та прогнозування зовнішньоекономічної діяльності ПАТ «Запоріжсталь». Новизна роботи полягає у розробці рекомендацій щодо подальшої діяльності підприємства ПАТ «Запоріжсталь» використовуючи комплексний підхід планування зовнішньоекономічної діяльності підприємства на основі прогнозів, розрахованих з урахуванням даних попередніх періодів діяльності, та врахування тенденцій сьогодення і найближчого майбутнього, тобто тих факторів, які можуть безпосередньо чи опосередковано вплинути на зовнішньоекономічну діяльність підприємства, а також виявлення ризиків і знаходження шляхів щодо їх мінімізації чи ліквідації.
EN : Master's qualification thesis: 129 pages, 8 pictures, 42 tables, 3 applications, 61 sources. The subject of research is a totality of theoretical, methodical and practical aspects of planning and forecasting of foreign economic activity of the enterprise. The object of research is the system of planning and forecasting of the metallurgical enterprise of PJSC «Zaporozhstal». The purpose of the thesis is to develop proposals for improving the efficiency of the planning system based on the forecasting of foreign economic activity of PJSC «Zaporozhstal». Specificity of the thesis consists in a detailed analysis of the planning processes at the enterprise, taking into account the constant changes in the economic processes of the environment, as well as the analysis of the dynamics of the external economic activity of the enterprise for the previous periods and the planning of further activities based on complex forecasts. During the writing of the thesis the concept of planning and forecasting of the foreign economic activity of the enterprise was defined, the peculiarities of the mechanism of their realization were clarified, the nature and content of their basic methods were investigated, as well as the classifications of their kind and types were considered; the methodology for determining the effectiveness of planning and forecasting FEA in the conditions of uncertainty and internationalization of business is substantiated. In addition, the organizational and economic characteristics of the enterprise of PJSC «Zaporozhstal», the investigated organization of its enterprise and the diagnostic system of planning and forecasting of FEA enterprises were conducted. In the third part of the thesis, the forecasting of foreign economic activity of PJSC «Zaporozhstal» is made, the recommendations on directions of improvement of the enterprise planning system are developed and the ways of increasing the efficiency of the system of planning and forecasting of the foreign economic activity of PJSC «Zaporozhstal» are proposed. The novelty of the thesis is to develop recommendations for the future activity enterprise of PJSC «Zaporozhstal» using a comprehensive approach of planning the foreign economic activity of the enterprise based on forecasts calculated taking into account the data of previous periods of activity, and taking into account the trends of the present and the near future, those factors, which may be directly or indirectly, influence the external economic activity of the enterprise, as well as identify risks and find ways to minimization or liquidation them.
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