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Dissertations / Theses on the topic 'Diagrama de dispersión'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

El, Azhar Fouad. "Phase diagrams of colloidal dispersions :computer simulation studies." Doctoral thesis, Universite Libre de Bruxelles, 2002. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211452.

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2

Moon, Jiyoung. "Satellite Dispersion in Narrow Spaces: A New Urban Campus Diagram." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367938401.

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3

Cepek, Tomáš. "Planární anténa na EBG substrátu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221013.

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The aim of the thesis is to describe EBG substrate and exminate his influence on some types of antennas and choose one of them for realization. In first part this thesis describes the paramaeters of antenna in generall, in the second part is dedicated to introduction with EBG substrate mainly on the surface with the high impedance (HIES). The third part deals with the simulations of microstrip patch antennas with EBG substrate and without EBG substrate. In the last parts was designed and optimized antenna using superstrate.

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4

Khodami, Maryam. "Dispersion Characteristics of One-dimensional Photonic Band Gap Structures Composed of Metallic Inclusions." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23179.

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An innovative approach for characterization of one dimensional Photonic Band Gap structures comprised of metallic inclusions (i.e. subwavelength dipole elements or resonant ring elements) is presented. Through an efficient S- to T-parameters conversion technique, a detailed analysis has been performed to investigate the variation of the dispersion characteristics of 1-D PBG structures as a function of the cell element configuration. Also, for the first time, the angular sensitivity of the structure has been studied in order to obtain the projected band diagrams for both TE and TM polarizations

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5

Bell, Tyler J. "Development and Implementation of Dispersion Phase Diagrams (DPDs) for Four Different Hydrophobically Modified Ethoxylated Urethane (HEUR) Based Acrylic Paint Systems." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1210.

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Latex polymers serve as binders in a wide range of architectural paints and coatings. A latex is an aqueous colloidal dispersion of polymer particles that when dried above the polymer’s film formation temperature coalesces into a dry polymer film (Dragnevski, Routh, Murray, & Donald, 2010). The other main components of paint include associative thickeners, surfactants, pigments and fillers with the thickener being the primary area of focus for this study. The relatively simple system of latex, associative thickener and surfactant has been studied extensively. These studies have shown the mecha

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6

Ghaderi, Hazhar. "The Rare Decay of the Neutral Pion into a Dielectron." Thesis, Uppsala universitet, Kärnfysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-211683.

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We give a rather self-contained introduction to the rare pion to dielectron decay which in nontrivial leading order is given by a QED triangle loop. We work within the dispersive framework where the imaginary part of the amplitude is obtained via the Cutkosky rules. We derive these rules in detail. Using the twofold Mellin-Barnes representation for the pion transition form factor, we derive a simple expression for the branching ratio B(π0 <img src="http://www.diva-portal.org/cgi-bin/mimetex.cgi?%5Crightarrow" /> e+e-) which we then test for various models. In particular a more recent form fact

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7

Lins, de Azevedo Costa Bhianca. "Generation of high drug loading amorphous solid dispersions by different manufacturing processes." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2018. http://www.theses.fr/2018EMAC0012/document.

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La principale difficulté lors de l'administration orale d'un ingrédient pharmaceutique actif (API) est de garantir que la dose clinique de l’API sera dissoute dans le volume disponible de liquides gastro-intestinaux. Toutefois, environ 40% des API sur le marché et près de 90% des molécules en cours de développement sont peu solubles dans l’eau et présentent une faible absorption par voie orale, ce qui entraîne une faible biodisponibilité. Les dispersions solides amorphes (ASD) sont considérées comme l’une des stratégies plus efficaces pour résoudre des problèmes de solubilité de

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8

Dorociak, Petr. "Vliv polarizační disperze na chybovost optického kanálu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217496.

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Master’s thesis engages in the impact of polarization mode dispersion on optical communication system. Polarization mode dispersion is mathematically described by Stoke’s and Jone’s space and ensure the theoretic causes of the rise of polarization mode dispersion that are divided on the external and internal effects. On the basis of these effects grow up a differential group delay (DGD) which makes causes that individual polarization modes have between them a time delay and limitation of maximum bit rate. Then master´s thesis analyses the influence of the polarization mode dispersion on the pu

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9

Fan, Taian. "Zero-Group-Velocity Propagation Of Electromagnetic Wave Through Nanomaterial." ScholarWorks @ UVM, 2016. https://scholarworks.uvm.edu/graddis/549.

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This research will investigate the problem on the propagation of electromagnetic wave through a specific nanomaterial. The nanomaterial analyzed is a material consisting of a field of Pt nanorods. This field of Pt nanorods are deposited on a substrate which consists of a RuO2 nano structure. When the nanorod is exposed to an electron beam emitted by a TEM (Transmission electron microscopy). A wave disturbance has been observed. A video taken within the chamber shows a wave with a speed in the scale of um/s (Á?10Á?^(-6) m/s), which is 14 orders of magnitude lower than speed of light in free spa

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10

Beran, Jaroslav. "Počítačové modelování metamateriálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217540.

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The diploma thesis deals with metamaterial structures. Metamaterials are periodic structures, which have got permittivity or permeability, eventually both parameters, negative. Test is applied on three basic structures: Split Loop Array; Spiral Array a Double Spiral Array. For each structure is made dispersion diagram and are monitored S – parameters. Test is run in Ansoft High Frequency Structure Simulator and CST Microwave Studio software. Are monitored bandgaps and when structure is as left – handed medium or right – handed medium. Results are compared with results in literature.

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11

BOS, SANDRA. "Etudes danes : methodologie et application a des echantillons absorbants." Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10152.

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Nous avons developpe les procedures experimentales et de traitement de donnees requises dans le cadre d'etudes danes (diffraction anomalous near edge spectroscopy) appliquees a l'etude d'echantillons tres absorbants sous forme de poudres et de monocristaux. Nous avons pour cela considere deux procedures experimentales differentes, en optiques (i) monochromatique et (ii) dispersive en energie, le but ultime etant d'obtenir des donnees de bonne qualite, reproductibles, en un temps de mesure le plus court possible. Nous avons pu montrer que la diffraction dispersive en energie permet d'effectuer

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12

Horský, Tomáš. "Rozšíření optického vláknového přenosového systému." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442378.

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The diploma thesis describes the elaboration of a program for the simulation of an optical transmission path. The work introduces the basic parameters of optical transmission, such as attenuation, dispersion and bandwidth. Furthermore, the techniques of line code and error detection are described in the work, especially a cyclic redundancy sum. The key parameter of this thesis is dispersion of the optical signal. The work includes the characteristics of the eye diagram and its analysis. The resulting program can also be used to measure the real transmission route and its parameters.

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13

Guo, Yunchuan. "Analysis and design of novel electromagnetic metamaterials." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/7864.

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This thesis introduces efficient numerical techniques for the analysis of novel electromagnetic metamaterials. The modelling is based on a Method of Moments modal analysis in conjunction with an interpolation scheme, which significantly accelerates the computations. Triangular basis functions are used that allow for modelling of arbitrary shaped metallic elements. Unlike the conventional methods, impedance interpolation is applied to derive the dispersion characteristics of planar periodic structures. With these techniques, the plane wave and the surface wave responses of fractal structures ha

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14

Horák, Jiří. "Planární antény na substrátech s elektromagnetickými zádržnými pásmy." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233478.

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Planar antennas are used in several technical applications. The family of planar antennas contains microstrip antennas, which are very popular due to the low weight, low profile, simple manufacturing and easy mass production. Lower gain and excitation of surface waves are disadvantages of microstrip antennas. The propagation of surface waves can be efficiently suppressed if the conventional substrate is replaced by an electromagnetic bandgap (EBG) substrate. Microstrip antennas on EBG substrates have been presented in an open literature for several years. Nevertheless, no published work is dev

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15

Ridell, Annika. "Characterisation of Aqueous Solutions, Liquid Crystals and Solid State of Non-ionic Polymers in Association with Amphiphiles and Drugs." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3607.

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16

Mata, Ramirez Jorge Octavio. "Caracterización de las Transiciones de Fase de las Cerámicas Ferroeléctricas del tipo Li-sub2(MM')(SO-sub4)super2 en donde M = Na+, K+, NH-sub4+." Doctoral thesis, Universitat de Barcelona, 2002. http://hdl.handle.net/10803/1257.

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El trabajo de esta tesis ha consistido en estudiar, preparar y caracterizar los compuestos pertenecientes a la familia M'M"BX-sub4, concretamente los de fórmula LiMSO-sub4, en donde M = Na+, K+ y NH-sub4+, para posteriormente estudiar los cristales mixtos de fórmula Li2MM'(SO-sub4)-super2 formados a partir de la mezcla de estos compuestos.<br/>La caracterización de las fases puras a diferentes temperaturas se ha efectuado mediante Difracción de Rayos-X, trabajando tanto con muestras monocristalinas como con muestras en polvo y variando la temperatura de medida de los difractógramas a diferente

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17

Vacinova, Jitka. "Etudes structurales des oxydes de platine par les méthodes de diffusion anomale et de D. A. F. S." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10185.

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Nous avons entrepris les etudes structurales de deux systemes d'oxydes de platine: ba/pt/o et bi/pb/pt/o par diffraction electronique et par diffraction des rayons x. Nous avons developpe les techniques experimentales de diffraction anomalous fine structure (dafs) et de diffraction anomale afin de les appliquer aux etudes de materiaux sous forme de monocristaux ou sous forme de poudres. Pour les mesures de dafs nous avons propose deux procedures experimentales differentes: le mode de diffraction multi-monochromatique et le mode de diffraction dispersive. L'information selective des diffuseurs

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18

Peng, Wen Ping, and 彭文平. "liquid-liquid phase diagrams in charged colloidal dispersions." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/09719448182178848002.

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碩士<br>國立中央大學<br>物理研究所<br>87<br>A realistic statistical-mechanics model [L. Belloni, J. Chem. Phys. 85, 519 (1986)] for describing the inter-colloidal particle interaction is applied to study phase equilibria in charged colloidal dispersions. This model which is valid at any finite concentration is appropriate for investigating the liquid-liquid phase separation since the macro-ion volume fraction η varies continuously from a low η→0 (the usual Derjaguin-Landau-Verwey-Overbeek (DLVO) model) to any finite η＜ 0.5 that characterizes a typical liquid phase. By appea

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19

Wang, Guan-Fei, and 王冠斐. "Phase-diagram study and liquid-glass transition phenomenon for chargedcolloidal dispersions." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/81091303787462881967.

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博士<br>國立中央大學<br>物理研究所<br>94<br>This thesis embodies two parts. The …rst part concerns with calculations of phase equilibrium phenomena and the methodology and analysis we proposed for a thorough un- derstanding of phase transition. The second part aims at liquid-glass transition phenomena applying the microscopic mode coupling theory to study the dynamical behaviors and ex- ploiting the factors leading to glass transition. Although the physical system of interest in both parts is the charge-colloidal dispersion, the physical process is, however, fundamentally di¤erent from the viewpoint of sta

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20

Wu, Kuo-Li, and 巫國立. "Theoretical Study of Phase-Diagram Domain and Aggregation Kinetics in Colloid Dispersions." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/23949801636470000710.

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21

TARDANI, FRANCO. "Dispersions of carbon nanotubes in complex water-based matrixes." Doctoral thesis, 2012. http://hdl.handle.net/11573/666624.

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Questo lavoro riguarda dispersioni di nanotubi di carbonio in surfattanti e biopolimeri in soluzione acquosa. Il principale obiettivo è determinare i parametri critici che governano le dispersioni in sistemi concentrati. L'uso di matrici acquose complesse è pensato essere rilevante nella futura preparazione di biomateriali. Per questo scopi, matrici con interessanti capacità orientazionali e/o proprietà meccaniche notevoli sono considerate. I nanotubi di carbonio sono stati dispersi in sistemi micellari e nematici di sodio dodecil solfato e biopolimeri concentrati (DNA, Lisozima). I sistemi so

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22

Kiatkirakajorn, Pree-cha. "Morphological instabilities in drying colloids." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E4C9-0.

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