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Dissertations / Theses on the topic 'Dispersiya'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Mietka, Colin. "Ondes périodiques dans des systèmes d’ÉDP hamiltoniens : stabilité, modulations et chocs dispersifs." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1031/document.

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La première partie de cette thèse concerne l'étude du problème de Cauchy pour l'équation de KdV quasi-linéaire.On établit un théorème d'existence locale obtenu grâce à des propriétés structurelles et des techniques de jauge qui permettent de compenser les pertes de dérivées apparentes dans les estimations a priori.Dans la seconde partie, les propriétés de stabilité orbitale co-périodique et modulationnelle sont explorées numériquement en exploitant des critères algébriques tous établis à partir d'une même intégrale d'action et de ses dérivées secondes. Notre méthode utilise des quadratures num

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2

Wongsangpaiboon, Natee. "Variational Calculation of Optimum Dispersion Compensation for Nonlinear Dispersive Fibers." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/32973.

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In fiber optic communication systems, the main linear phenomenon that causes optical pulse broadening is called dispersion, which limits the transmission data rate and distance. The principle nonlinear effect, called self-phase modulation, can also limit the system performance by causing spectral broadening. Hence, to achieve the optimal system performance, high data rate and low bandwidth occupancy, those effects must be overcome or compensated. In a nonlinear dispersive fiber, properties of a transmitting pulse: width, chirp, and spectra, are changed along the way and are complicated to p

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3

Bernard, Paolantoni Sandrine. "Analyse spectrale et simulation numérique de cavités contenant un matériau négatif." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAE005.

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Cette thèse réalise une étude théorique et numérique du spectre de cavités partiellement composées de matériau négatif, c'est-à-dire de matériau pour lequel la perméabilité magnétique et/ou la permittivité électrique (ou au moins leur partie réelle) deviennent négatives dans certaines plages de fréquences. Cette étude s'inscrit dans la continuité des travaux engagés dans notre laboratoire qui se concentrent sur la propagation des ondes électromagnétiques en présence de matériau négatif, à fréquence fixée. L'objectif de cette thèse est de prendre en compte la dispersion fréquentielle, autrement

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4

Palacios, Armesto José Manuel. "Estabilidad de soluciones tipo soliton para ciertas ecuaciones dispersivas no lineales." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/167768.

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Ingeniero Civil Matemático<br>Este trabajo consiste principalmente en dos resultados matemáticos, basados en el estudio de ecuaciones dispersivas no lineales, la estabilidad de ciertas soluciones de las mismas, como así también la posible explosión en tiempo finito. En una primera parte, Capítulo 1, presentamos una breve introducción a los tópicos tratados en esta memoria. Se hace especial énfasis en la descripción de los conceptos de ecuación dispersiva, buen colocamiento, 2-solitones, estabilidad y explosión. En el Capítulo 2 probaremos que las soluciones de tipo 2-soliton de la ecuación d

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5

Piaseckienė, Karolina. "Natūralios odos santykinio slankumo vidurkio ir dispersijos įverčiai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_161603-67163.

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Natūralios odos fizikinėms–mechaninėms savybėms pagerinti taikomas mechaninio minkštinimo technologinis procesas. Naudojama keletas minkštinimo būdų: vibruojančiais puansonais, besisukančiais velenais srautinėse mašinose ir kt. Pagrindinė problema, su kuria susiduriama minkštinant odą – nėra prietais�� odos minkštumui nustatyti. Minkštumas vertinamas pagal odos standumą, o šis apskaičiuojamas išmatavus santykinį poilgį, esant tam tikro dydžio įtempiams. Norint nustatyti odos minkštumą, tiksliau, santykinį slankumą, su 113 minkštintos odos bandinių buvo atlikti du eksperimentai – tūrinis dviaši

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6

Rosas, Martinez Luis. "Study of two wave propagation problems in electromagnetic dispersive media : 1) Long-time stability analysis in Drude-Lorentz media; 2) Transmission between a slab of metamaterial on a dielectric." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAE011.

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Cette thèse traite de deux problèmes indépendants liés aux phénomènes de propagation des ondes dans les milieux dispersifs. Dans la première partie, nous étudions le comportement en temps long des solutions des équations de Maxwell dans des milieux dissipatifs généralisés de Drude-Lorentz. Plus précisément, nous souhaitons quantifier les pertes dans de tels milieux à l'aide du taux de décroissance de l'énergie électromagnétique pour le problème de Cauchy correspondant. Cette première partie est elle-même composée de deux approches. La première, l'approche par fonctions de Lyapunov en fréquence

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7

Drouin, Marie. "Modélisation des écoulements turbulents anisothermes en milieu macroporeux par une approche de double filtrage." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0066/document.

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Ce travail porte sur la modélisation d'écoulements turbulents anisothermes dans des milieux macroporeux. Ce problème intéresse de nombreux domaines : échangeurs de chaleur, réacteurs nucléaires, canopées... Notre objectif est de modéliser des écoulements traversant une structure solide selon un approche multi-échelle. L'utilisation d'un opérateur de moyenne spatiale permet ainsi d'obtenir une description homogénéisée des écoulements, tandis que l'aspect turbulent est traité grâce à un opérateur de moyenne statistique. Au cours du processus de moyenne, une partie des informations sur l'état mic

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8

Brengdahl, Martin. "Differentiation of dispersive traits under a fluctuating range distribution in Asellus aquaticus." Thesis, Linköpings universitet, Biologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108119.

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Knowledge about dispersion is of utmost importance for understanding populations’ reaction to changes in the environment. Expansion of a population range brings with it both spatial sorting and over time, spatial selection. This means that dispersion rates increases over time at the expanding edge. Most studies have so far been performed on continuously expanding populations. This study aims to bring more knowledge about dispersal biology in dynamic systems. I studied dispersal traits in two permanent and two seasonal vegetation habitats of an isopod (Asellus aquaticus), for which differentiat

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9

Cunha, Helder Nunes da. "Condutividade induzida por radiação-x nas fases ferroelétrica e paraelétrica em copoli(fluoreto de vinilideno/tri-fluoretileno)." Universidade de São Paulo, 1994. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-15042014-092035/.

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O comportamento da condutividade induzida por radiação-X (RIC) em copolímeros P(VDF/TrFE) de razões molares 60/40 e 70/30 em suas fases ferroelétrica (temperatura ambiente) e paraelétrica (acima de 110°C), foi estudado para diferentes condições ambientais. Foi observado que a RIC depende fortemente sobre a conformação molecular do polímero. Variaram-se parâmetros experimentais como campo elétrico aplicado, taxa de dose, atmosfera ambiente e, principalmente a temperatura. Medidas auxiliares como correntes termoestimuladas, calorimetria diferencial, espectroscopias infravermelho, ressonância ele

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10

Carchini, Giuliano. "A First Principles Investigation of the Adsorption and Reactions of Polyfunctionalized Molecules on Oxides and Metals." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/319709.

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En aquesta Tesi, hem estudiat l'adsorció en òxids i metalls mitjançant simulacions basades en la Teoria del Funcional de Densitat considerant una correcció semiempírica per a la dispersió. En primer lloc, s'han investigat els rutils, que tenen la mateixa cel·la unitat i poden barrejar-se obtenint noves propietats. En presència d'impureses, es troben semiconductors adsorbits i complexos metàl·lics en el bulk, revertint l'oxígen aquest comportament. A mes, es pot fer crèixer, de forma epitaxial, qualsevol rutil damunt d'un altre. A continuació, s'ha estudiat l'adsorció d'alcohols en Titania.

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11

Roht, Yanina Lucrecia. "Transport et dispersion d’un traceur dans un écoulement de suspensions oscillant." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS065/document.

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On étudie le transport et la dispersion hydrodynamique d’un traceur passif et/ou d’une suspension de particules dans deux fractures modèles avec deux parois lisses ou avec une distribution aléatoire d’obstacles dans l’ouverture. On utilise un écoulement oscillant d’un fluide newtonien afin d’observer les effets sur la dispersion de la réversibilité du déplacement. On caractérise de manière quantitative l’influence des paramètres caractéristiques de l’écoulement: période T et amplitude A des oscillations et temps caractéristique τ_m de diffusion moléculaire sur l’épaisseur.Dans le cas de parois

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12

Atroškaitė, Ramunė. "Draudos suminių išmokų skirstinio analizė." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080625_161416-64673.

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Šiame darbe nagrinėjama atsitiktinio dėmenų (atsitiktinių dydžių) skaičiaus skirstinio funkcijos aproksimacijos normaliuoju dėsniu tolygusis ir netolygusis įverčiai. Atsitiktinių dydžių atsitiktinio dėmenų skaičiaus suma traktuojama kaip draudėjo suminės išmokos. Pilnai išnagrinėtas atvejis, kai atsitiktinis dėmenų skaičius yra homogeninis Puasono procesas. Kita darbo dalis skirta atvejui, kai nėra Puasono procesas. Darbą sudaro 8 dalys: įvadas, analitinė – metodinė dalis, rezultatai, kuriais remsimės darbe, darbo tikslas, darbo rezultatai, publikuotas straipsnis, išvados, literatūros sąrašas.

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13

Wong, Samuel Tin Bo 1979. "Dispersion-managed solutions in the path-average normal dispersion regime." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86745.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (leaves 83-87).<br>by Samuel Tin Bo Wong.<br>M.Eng.

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14

Komaki, Ghorbanmohammad. "PORTFOLIO SELECTION AND RISK DISPERSION BASED ON GEOMETRIC DISPERSION THEORY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1512232304419177.

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15

Sadofyev, Andrey, and Srimoyee Sen. "Chiral anomalous dispersion." SPRINGER, 2018. http://hdl.handle.net/10150/627127.

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The linearized Einstein equation describing graviton propagation through a chiral medium appears to be helicity dependent. We analyze features of the corresponding spectrum in a collision-less regime above a flat background. In the long wave-length limit, circularly polarized metric perturbations travel with a helicity dependent group velocity that can turn negative giving rise to a new type of an anomalous dispersion. We further show that this chiral anomalous dispersion is a general feature of polarized modes propagating through chiral plasmas extending our result to the electromagnetic sect

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16

Farzaneh, Mohamadreza. "Modeling Traffic Dispersion." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29757.

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The dissertation studies traffic dispersion modeling in four parts. In the first part, the dissertation focuses on the Robertson platoon dispersion model which is the most widely used platoon dispersion model. The dissertation demonstrates the importance of the Yu and Van Aerde calibration procedure for the commonly accepted Robertson platoon dispersion model, which is implemented in the TRANSYT software. It demonstrates that the formulation results in an estimated downstream cyclic profile with a margin of error that increases as the size of the time step increases. In an attempt to address t

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17

Moreira, Bruna Juliana. "Avaliação da microextração líquido-líquido dispersiva para análise de oxibutinina e de N-desetiloxibutinina em urina por eletroforese capilar." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/60/60137/tde-11012013-110148/.

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A microextração líquido-líquido dispersiva (DLLME) é uma técnica de preparo de amostra baseada no equilíbrio de distribuição do analito entre a fase doadora (amostra) e a fase aceptora (solvente orgânico) em um sistema ternário de solventes. Foi desenvolvida em 2006 por Rezaee e colaboradores para a determinação de hidrocarbonetos policíclicos aromáticos em amostras de água e por ser uma técnica muito recente,ainda é pouca explorada para o preparo de amostras biológicas. Portanto, o objetivo deste trabalho foi avaliar a DLLME como técnica para a extração da oxibutinina (OXY), fármaco usado par

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18

Vento, Stéphane. "Étude de quelques équations d'ondes en milieux dispersifs ou dispersifs-dissipatifs." Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00344256.

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Dans cette thèse nous nous intéressons aux propriétés qualitatives et quantitatives des solutions de quelques équations d'ondes en milieux dispersifs ou dispersifs-dissipatifs. Dans une première partie, nous étudions le problème de Cauchy associé aux équations de Benjamin-Ono généralisées. A l'aide de transformées de jauge, combinées avec des outils d'analyse harmonique, nous prouvons des résultats concernant le caractère localement bien posé pour des données initiales de régularité minimale dans l'échelle des espaces de Sobolev. Dans une seconde partie, nous étudions le problème de Cauchy pou

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19

Liu, Weilin. "Real-time Interrogation of Fiber Bragg Grating Sensors Based on Chirped Pulse Compression." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20289.

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Theoretical and experimental studies of real-time interrogation of fiber Bragg grating (FBG) sensors based on chirped pulse compression with increased interrogation resolution and signal-to-noise ratio are presented. Two interrogation systems are proposed in this thesis. In the first interrogation system, a linearly chirped FBG (LCFBG) is employed as the sensing element. By incorporating the LCFBG in an optical interferometer as the sensor encoding system, employing wavelength-to-time mapping and chirped pulse compression technique, the correlation of output microwave waveform with a chirped

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20

Marozas, Nerijus. "Oro tarša kietosiomis dalelėmis Šiaulių mieste." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080628_092611-22804.

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Oro tarša yra viena svarbiausių žmonijos problemų Lietuvoje ir pasauliniu mąstu. Oro taršos poveikis kelia didžiulį pavojų aplinkai ir visų gyvų organizmų tolimesniam egzistavimui. Viena pagrindinių problemų daugumoje didesnių miestų yra užterštumas kietosiomis dalelėmis. Šiame darbe pateikiami tyrimų duomenys apie kietųjų dalelių ir sunkiųjų metalų koncentracijų kiekius Šiaulių miesto aplinkos ore 2007 m. Darbe įvertinti atliktų kietųjų dalelių koncentracijų tyrimai gyvenamųjų mikrorajonų aplinkos ore šildymo sezonu, iš kurių paaiškėjo, kad labiausiai kietosiomis dalelėmis užterštas Medelyno

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21

Puig, Saus Cristina. "Estratègies de millora de la potència antitumoral dels adenovirus oncolítics basades en l’increment de l’alliberament viral i l’extravasació vascular." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/123285.

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La viroteràpia amb adenovirus oncolítics es basa en la lisi selectiva de la cèl•lula tumoral a través de la replicació viral. Les principals limitacions d’aquesta teràpia són: la limitada arribada del virus al tumor després de l’administració sistèmica, la baixa dispersió intratumoral i la resposta immune antiviral. En aquesta tesi hem presentat estratègies per millorar la disseminació intratumoral basades en l’augment de l’alliberament viral i en la millora de l’extravasació i penetració del virus al parènquima tumoral, augmentant en els dos casos l’eficàcia antitumoral. Una de les principa

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22

Pauli, Muriel de 1988. "Estudos de multicamadas auto-organizadas de ácidos fosfônicos por difração dispersiva em energia." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277306.

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Orientadores: Angelo Malachias de Souza, Eduardo Granado Monteiro da Silva<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-19T18:22:37Z (GMT). No. of bitstreams: 1 Pauli_Murielde_M.pdf: 18020420 bytes, checksum: ea0b8509035e788d8af363ac04130ca2 (MD5) Previous issue date: 2012<br>Resumo: Esta dissertação trata do estudo estrutural e termodinâmico de sistemas orgânicos auto-organizados utilizando diferentes técnicas de espalhamento de raios-x. Multicamadas autoorganizadas de dois tipos de moléculas de ácido

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23

Nisa, Khoirin. "On multivariate dispersion analysis." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2025.

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Cette thèse examine la dispersion multivariée des modelés normales stables Tweedie. Trois estimateurs de fonction variance généralisée sont discutés. Ensuite dans le cadre de la famille exponentielle naturelle deux caractérisations du modèle normal-Poisson, qui est un cas particulier de modèles normales stables Tweedie avec composante discrète, sont indiquées : d'abord par fonction variance et ensuite par fonction variance généralisée. Le dernier fournit la solution à un problème particulier d'équation de Monge-Ampère. Enfin, pour illustrer l'application de la variance généralisée des modèles

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24

Slater, Geoffrey Reginald. "Welding fume plume dispersion." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050307.120815/index.html.

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25

Nokes, Roger Ian. "Problems in turbulent dispersion." Thesis, University of Canterbury. Civil Engineering, 1985. http://hdl.handle.net/10092/7711.

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Solutions to a number of turbulent dispersion problems, involving a contaminant issuing from a steady source into uniform, steady open channel flow, are presented. These problems include the two and three-dimensional dispersion of a neutrally buoyant contaminant and the two-dimensional dispersion of buoyant particles and are modelled with the diffusion equation incorporating turbulent diffusion coefficients. In order to ensure that the solutions simulate the physical processes as accurately as possible the experimentally determined logarithmic velocity profile and the theoretically deduced par

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26

Sanders, John E. "Jet dispersion in channels." Thesis, University of East London, 1998. http://roar.uel.ac.uk/1254/.

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This is an experimental and theoretical investigation of the dispersion of a round water jet discharging at various angles into a rectangular channel. A fundamental study of the jet is not only essential for a better understanding of the flow conditions produced by confined water jets but for a scientific approach to the design of hydraulic structures and to determine an efficient form of stilling basin for high velocity discharge from pipe outlets. The Laser Doppler Anemometry (LDA) technique was adapted for measurement of mean velocities and turbulence characteristics,, without any interfere

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27

Park, J.-K. "Modelling of pollutant dispersion." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353447.

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Davies, Stuart. "Essays on wage dispersion." Thesis, University of Essex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285824.

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Cunha, Francisco Ricardo da. "Hydrodynamic dispersion in suspensions." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338138.

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30

Koch, Donald Lyle. "Dispersion in heterogeneous media." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/15207.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.<br>Vita.<br>Includes bibliographies.<br>by Donald Lyle Koch.<br>Ph.D.

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31

Watley, Daniel Andrew. "Polarisation mode dispersion compensation." Thesis, University of Cambridge, 2000. https://www.repository.cam.ac.uk/handle/1810/272331.

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Feder, Jens. "Diffusion, dissolution and dispersion." Diffusion fundamentals 16 (2011) 19, S. 1, 2011. https://ul.qucosa.de/id/qucosa%3A13748.

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33

Koerdt, Clemens. "Magneto-spatial dispersion phenomena." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11482075.

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34

Witzens, Jeremy Scherer Axel. "Dispersion in photonic crystals /." Diss., Pasadena, Calif. : California Institute of Technology, 2005. http://resolver.caltech.edu/CaltechETD:etd-05242005-094353.

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Feder, Jens. "Diffusion, dissolution and dispersion." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184715.

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36

Glomb, Andrzej Jozef 1956. "Dispersion of traffic platoons." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277138.

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The general objective of this research was to examine the space/time distribution of traffic platoons over a long stretch of roadway with conditions predominant for the southern Arizona urban area. Two sites were chosen for data collection. Both traffic links were one mile long between two successive traffic signals and both were typical of the local low-friction traffic flow conditions. All data were recorded by observers using 20-channel Esterline-Angus recorders. The specifics of the data collection method permitted studying only variables such as the lane of travel, traffic composition, pl

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Alger, Luke. "Dispersion polymerisation of divinylbenzene." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/34134.

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Particles containing 55% divinylbenzene (DVB) have been prepared using dispersion polymerisation. The steric stabilisers that have been utilised are partially hydrolysed poly(vinyl acetate)s, poly(ethylene oxide) and a poly(ethylene oxide) macromonomer in methanolic media. The concentrations of stabiliser, monomer and initiator have been varied to investigate the influence that they have on the particle size and the particle size distribution. The particles have been characterised by scanning electron microscopy (SEM) for a visual impression of the particles in addition to laser diffraction pa

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Ferdousi, Amena. "Dispersion in Alluvial River." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423705.

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River pollution is the contamination of river water by pollutant being discharged directly or indirectly on it. Depending on the degree of pollutant concentration, subsequent negative environmental effects such as oxygen depletion and severe reductions in water quality may occur which affect the whole environment. River pollution can then cause a serious threat for fresh water and as well as the entire living creatures. Dispersion in natural stream is the ability of a stream to dilute soluble pollutants. Different types of pollution, such as accidental spill of toxic chemicals, industrial wast

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Meas, Len. "Estimations de dispersion et de Strichartz dans un domaine cylindrique convexe." Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4038/document.

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Dans ce travail, nous allons établir des estimations de dispersion et des applications aux inégalités de Strichartz pour les solutions de l’équation des ondes dans un domaine cylindrique convexe Ω ⊂ R³ à bord C∞, ∂Ω ≠ ∅. Les estimations de dispersion sont classiquement utilisées pour prouver les estimations de Strichartz. Dans un domaine Ω général, des estimations de Strichartz ont été démontrées par Blair, Smith, Sogge [6,7]. Des estimations optimales ont été prouvées dans [29] lorsque Ω est strictement convexe. Le cas des domaines cylindriques que nous considérons ici généralise les resultat

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Razmislevičienė, Ina. "Dispersive liquid-liquid microextraction for the determination of metals." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130625_092031-65110.

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The aim of this work was to investigate and apply new DLLME systems coupled with LA-ICP-MS and ultra-performance liquid chromatography (UPLC) techniques for the preconcentration and determination of Cr(VI), Co(II), Cu(II) ir Ni(II) ions.<br>Šioje daktaro disertacijoje apibendrintų mokslinių tyrimų tikslas – ištirti ir pritaikyti naujus Cr(VI), Co(II), Cu(II) ir Ni(II) koncentravimo ir nustatymo metodus apjungiant dispersinę skystafazę mikroekstrakciją (DSME) su lazerinio išgarinimo induktyviai sužadintos plazmos masių spektrometrijos (LA-ICP-MS) bei ultraefektyviosios skysčių chromatografijos

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Razmislevičienė, Ina. "Dispersinė skystafazė mikroekstrakcija metalams nustatyti." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130625_092120-03135.

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Šioje daktaro disertacijoje apibendrintų mokslinių tyrimų tikslas – ištirti ir pritaikyti naujus Cr(VI), Co(II), Cu(II) ir Ni(II) koncentravimo ir nustatymo metodus apjungiant dispersinę skystafazę mikroekstrakciją (DSME) su lazerinio išgarinimo induktyviai sužadintos plazmos masių spektrometrijos (LA-ICP-MS) bei ultraefektyviosios skysčių chromatografijos (UESCh) metodais.<br>The aim of this work was to investigate and apply new DLLME systems coupled with LA-ICP-MS and ultra-performance liquid chromatography (UPLC) techniques for the preconcentration and determination of Cr(VI), Co(II), Cu(II

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Farias, BÃrbara Vasconcelos de. "AvaliaÃÃo do equilÃbrio de adsorÃÃo e projeto de condiÃÃes de separaÃÃo de praziquantel por cromatografia lÃquida de alta eficiÃncia (CLAE)." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10940.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>O praziquantel (PZQ) Ã um medicamento anti-helmÃntico de alto espectro utilizado no tratamento de todos os tipos de esquistossomose. No Brasil a mistura racÃmica Ã utilizada na fabricaÃÃo do medicamento. Sabe-se que a espÃcie enantiomÃrica R-PZQ Ã a que possui efeito anti-helmÃntico e que esta espÃcie possui sabor menos amargo. Sendo assim formulaÃÃes baseadas no R-PZQ somente teriam metade da dose necessÃria da formulaÃÃo sÃlida da mistura racÃmica e as formulaÃÃes lÃquidas teriam sabor menos amargo. Para obtenÃÃo de enantiÃmeros

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Ozbay, Ali. "Comparison Of Dispersive And Non-dispersive Numerical Long Wave Models And Harbor Agitation." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614391/index.pdf.

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In this study, the evolution of the numerical water wave models with the theoretical background and the governing equations are briefly discussed and a numerical model MIKE21 BW which can be applied to wave problems in nearshore zone is presented. The numerical model is based on the numerical solution of the Boussinesq type equations formulated on time domain. Nonlinearity and frequency dispersion is included in the model. In order to make comparison between the results of nonlinear shallow water equations with Boussinesq terms, MIKE21 BW and NAMIDANCE are applied to the problem of wave propag

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COLVERO, CLAITON PEREIRA. "STUDY OF CHROMATIC DISPERSION AND NONLINEAR EFFECTS IN SHIFTED DISPERSION FIBER OPTIC SYSTEM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2001. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1553@1.

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AGÊNCIA NACIONAL DE PETRÓLEO<br>Neste trabalho é apresentado um estudo sobre a determinação matemática dos valores da dispersão cromática total, do zero de dispersão distribuído e efeitos não lineares em fibras ópticas de dispersão deslocada (DS). Uma metodologia para caracterização das dispersões cromáticas e para os zeros de dispersão local das fibras estudadas é elaborada com a utilização do modelo de fibra degrau equivalente e de aproximações entre as fibras ópticas dos enlaces trabalhados. A relação entre o diâmetro do campo modal e o zero de dispersão cromática distribuído segund

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Ducros, Delphine. "La dispersion dans un monde changeant : variations des coûts de la dispersion chez le chevreuil, et leurs effets sur l'évolution de la dispersion." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30294.

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La dispersion natale est un processus durant lequel les individus se déplacent de leur domaine natal vers leur domaine de reproduction. Ce processus fondamental pour la dynamique et la persistance des populations passe par l'évitement de la consanguinité ou la capacité des individus à atteindre et coloniser de nouveaux habitats contenant des ressources ou des partenaires sexuels. La dispersion peut donc comporter de nombreux bénéfices pour les individus disperseurs. Cependant, elle peut également être coûteuse pour les individus, en raison d'une augmentation de la mortalité ou des blessures, u

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Albo, Sánchez Jonathan. "Desarrollo de una tecnología innovadora para la mitigación del cambio climático: absorción no dispersiva con líquidos iónicos. Development of an innovative technology for climate change mitigation: non-dispersive absorption with ionic liquids." Doctoral thesis, Universidad de Cantabria, 2012. http://hdl.handle.net/10803/84157.

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La Captura y Almacenamiento de dióxido de Carbono (CAC), es una tecnología orientada a mitigar el impacto de los gases de efecto invernadero producidos en la quema de combustibles fósiles en procesos industriales y de generación de energía, donde la captura de dióxido de carbono (CO2) supone el cuello de botella del proceso, y por tanto donde deben centrarse los esfuerzos. En este contexto, el objetivo de este trabajo es la intensificación del proceso de absorción de CO2 convencional en dos etapas: i) Sustitución del equipamiento convencional (e.g. torres de absorción) por sistemas de membrana

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Prakash, Aravind. "Confidential Data Dispersion using Thresholding." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_theses/232.

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With growing trend in "cloud computing" and increase in the data moving into the Internet, the need to store large amounts of data by service providers such as Google, Yahoo and Microsoft has increased over time. Now, more than ever, there is a need to efficiently and securely store large amounts of data. This thesis presents an implementation of a Ramp Scheme that confidentially splits a data file into a configurable number of parts or shares of equal size such that a subset of those shares can recover the data entirely. Furthermore, the implementation supports a threshold for data compromise

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Li, Suxi. "Demand Uncertainty and Price Dispersion." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_dissertations/59.

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Demand uncertainty has been recognized as one factor that may cause price dispersion in perfectly competitive markets with costly and perishable capacity. With the persistence of the degree of price dispersion in increasingly competitive markets, demand uncertainty has become more important for us to understand the phenomenon of fare inequality. This dissertation consists of three related studies on this topic. In the first study, Prescott (1975) model is extends by incorporating the heterogeneity of customers' reservation values. The model shows that the equilibrium price dispersion also depe

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Magnusson, Lukas. "Dispersion Trading : Construction and Evaluation." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-123733.

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Since the introduction of derivatives into the modern financial market, volatility based tradingstrategies have emerged as important tools for asset managers. Since the financial crisis apopular trading strategy has been dispersion trading, however few published studies ofdispersion trading exist. This thesis aim to perform a study of how dispersion strategies performand their characteristics. This is achieved by finding basic common dispersion trading strategies,isolate and evaluate their attributes to then draw conclusions in general about dispersion trading.Three basic dispersion strategies

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Reinhardt, Jeff C. "Precipitation/dispersion polymerization of acrylamide." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/10210.

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