Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T19:50:21Z No. of bitstreams: 1 RafaelCelestinoDosSantos_DISSERT.pdf: 2928154 bytes, checksum: ed85070c1f646df9265898c17421fbdd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-22T19:46:13Z (GMT) No. of bitstreams: 1 RafaelCelestinoDosSantos_DISSERT.pdf: 2928154 bytes, checksum: ed85070c1f646df9265898c17421fbdd (MD5) / Made available in DSpace on 2017-03-22T19:46:13Z (GMT). No. of bitstreams: 1 RafaelCelestinoDosSantos_DISSERT.pdf: 2928154 bytes, checksum: ed85070c1f646df9265898c17421fbdd (MD5) Previous issue date: 2016-12-16 / Este trabalho tem por objetivo apresentar a influ?ncia de uma metasuperf?cie, um tipo especial dos metamateriais, no desempenho das antenas de microfitas. As metasuperf?cies s?o materiais artificiais que n?o s?o encontrados em sua forma convencional na natureza e apresentam caracter?sticas eletromagn?ticas n?o convencionais, como o ?ndice de refra??o e os coeficientes de permissividade el?trica e permeabilidade magn?tica negativos o que provocam efeitos eletromagn?ticos atrativos para diversas aplica??es, como por exemplo: melhorar a performance de uma antena de microfita como ser? mostrado nesse trabalho. Iniciaremos o trabalho mostrando um breve hist?rico, defini??es e propriedades eletromagn?ticas das antenas, antenas de microfita, metamateriais e das metasuperf?cies. Em seguida, iremos projetar e confeccionar uma antena de microfita com e sem a utiliza??o de uma metasuperf?cie onde simularemos atrav?s do software HFSS Ansoft Designer e testaremos em laborat?rio atrav?s do equipamento E5071C ENA Network Analyzer. Por fim, realizaremos uma an?lise comparativa, mostrando o quanto a metasuperf?cie melhora a performance de uma antena de microfita atrav?s de uma an?lise dos diversos par?metros da antena, como: perda de retorno, ganho de pot?ncia, diretividade e imped?ncia de entrada. / This paper aims to present the influence of a metasurface, a special type of metamaterials, in the performace of microstrip antennas. The metasurface are artificial materials that are not found in a conventional manner in nature and do not have conventional electromagnetic characteristics such as refractive index and coefficient of permittivity and negative magnetic permeability which causes attractive electromagnetic effects for various applications, such as: improving the performance of a microstrip antenna as will be shown in this work. We started the work showing a brief history, definitions and electromagnetic properties of the antennas, microstrip antennas, metamaterials and metasuperf?cies. Next, we will design and manufacture a microstrip antenna with and without the use of a metasurface where we will simulate through HFSS Ansoft Designer software and test in the laboratory with the E5071C ENA Network Analyzer. Finally, we will perform a comparative analysis, showing how the metasurface improves the performance of a microstrip antenna by analysis of the various parameters antenna, such as: return loss, power gain, directivity and input impedance.

Submitted by Alex Sandro R?go (alex@ifpb.edu.br) on 2017-06-06T12:11:49Z No. of bitstreams: 1 33- Maria La?s F?lix da Silva - ESTUDO E DESENVOLVIMENTO DE SENSOR EM FIBRA ?PTICA POLIM?RICA BASEADO NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 1171314 bytes, checksum: 71f7ec19abb6963312d0d672f587dfcb (MD5) / Approved for entry into archive by Alex Sandro R?go (alex@ifpb.edu.br) on 2017-06-06T12:14:12Z (GMT) No. of bitstreams: 1 33- Maria La?s F?lix da Silva - ESTUDO E DESENVOLVIMENTO DE SENSOR EM FIBRA ?PTICA POLIM?RICA BASEADO NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 1171314 bytes, checksum: 71f7ec19abb6963312d0d672f587dfcb (MD5) / Made available in DSpace on 2017-06-06T12:14:12Z (GMT). No. of bitstreams: 1 33- Maria La?s F?lix da Silva - ESTUDO E DESENVOLVIMENTO DE SENSOR EM FIBRA ?PTICA POLIM?RICA BASEADO NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 1171314 bytes, checksum: 71f7ec19abb6963312d0d672f587dfcb (MD5) Previous issue date: 2017-05-06 / O presente trabalho tem como intuito estudar e desenvolver um sensor em fibra ?ptica polim?rica multimodo, baseado no fen?meno de Resson?ncia de Pl?smons de Superf?cie (Surface Plasmon Resonance, SPR). Esse fen?meno vem ganhando cada vez mais destaque devido ? elevada sensibilidade a pequenas varia??es de ?ndice de refra??o do meio externo. O interesse na utiliza??o de fibra ?ptica polim?rica como substrato deve-se ? possibilidade da redu??o de tamanho e peso, f?cil manuseio no que diz respeito ? remo??o da casca, realizada por meio de um procedimento simples, em que a fibra ? imersa em uma solu??o qu?mica, sem envolver processos mais complexos que poderiam aumentar o custo do sensor, al?m do acesso remoto. A configura??o utilizada ? o modelo de Krestchmann, baseado na Reflex?o Total Atenuada, constitu?do por tr?s camadas: um substrato ?ptico, uma camada met?lica com elevada condutividade e um analito com ?ndice de refra??o a ser identificado. A resposta do sensor ?ptico SPR neste trabalho usar? os modos de interroga??o espectral e angular, com os pontos de opera??o do sensor (comprimento de onda e ?ngulo de resson?ncia, respectivamente) determinados computacionalmente. Para a fabrica??o do sensor, uma caracteriza??o num?rica ? realizada com o intuito de investigar a espessura do filme fino e o ponto de opera??o do sensor para a detec??o do analito de interesse. O modelo utilizado ? composto por tr?s camadas: pol?mero (camada 1), Ouro (camada 2) e ?gua destilada (camada 3). Na prepara??o da regi?o sensora, ser? mostrado que a casca da fibra ?ptica deve ser removida quimicamente, e depositada em seu lugar uma camada fina de metal (Ouro), utilizando uma m?quina de pulveriza??o cat?dica. A carateriza??o experimental no modo de interroga??o angular apresenta concord?ncia com os resultados te?ricos, assim como os resultados experimentais obtidos para o modo de interroga??o espectral. Com base nas investiga??es realizadas ao longo do trabalho, ? poss?vel prever um futuro promissor na utiliza??o das fibras ?pticas como substrato de sensores ?pticos SPR

Submitted by Programa de P?s-Gradua??o Engenharia El?trica (ppgee@ifpb.edu.br) on 2018-04-17T14:34:49Z No. of bitstreams: 1 42- M?rcia Fernanda da Silva Santiago - CARACTERIZA??O DE FIBRAS ?PTICAS MICROESTRUTURADAS PARA APLICA??O EM SENSORES BASEADOS NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 3830493 bytes, checksum: 0d5677af2fa2da844b06326e563cefca (MD5) / Approved for entry into archive by Programa de P?s-Gradua??o Engenharia El?trica (ppgee@ifpb.edu.br) on 2018-04-17T16:58:10Z (GMT) No. of bitstreams: 1 42- M?rcia Fernanda da Silva Santiago - CARACTERIZA??O DE FIBRAS ?PTICAS MICROESTRUTURADAS PARA APLICA??O EM SENSORES BASEADOS NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 3830493 bytes, checksum: 0d5677af2fa2da844b06326e563cefca (MD5) / Made available in DSpace on 2018-04-17T16:58:10Z (GMT). No. of bitstreams: 1 42- M?rcia Fernanda da Silva Santiago - CARACTERIZA??O DE FIBRAS ?PTICAS MICROESTRUTURADAS PARA APLICA??O EM SENSORES BASEADOS NA RESSON?NCIA DE PL?SMONS DE SUPERF?CIE.pdf: 3830493 bytes, checksum: 0d5677af2fa2da844b06326e563cefca (MD5) Previous issue date: 2018-02-26 / Capes / A preocupa??o com sa?de p?blica ? um fator relevante na hist?ria da humanidade, epidemias de doen?as causadas por v?rus e bact?rias podem provocar impactos socioecon?micos, nas ?reas atingidas por elas. Essa preocupa??o tem impulsionado a pesquisa e o desenvolvimento de dispositivos que sejam capazes de prevenir e detectar patologias auxiliando no tratamento. Ao longo dos anos t?m sido propostas e desenvolvidas diversas plataformas de sensoriamento visando a detec??o e an?lise de subst?ncias qu?micas e biol?gicas que podem caracterizar algumas patologias espec?ficas na ?rea de sa?de. A constru??o dessas plataformas sensoras resultam de estudos multidisciplinares que agregam diferentes ?reas de estudo, como engenharia e medicina resultando em diversas configura??es de sensores e biossensores. A obten??o de sensoriamento pode ser realizada a partir de algumas abordagens, dentre as quais destaca-se o efeito de resson?ncia de pl?smons de superf?cie (Surface Plasmon Resonance - SPR) que, aliado ? tecnologia das fibras ?pticas, tem possibilitado a constru??o de biochips ?pticos que integram o sistema de sensoriamento. As fibras ?pticas apresentam algumas vantagens de utiliza??o em compara??o com os biochips tradicionais baseados em prisma, tais como, dimens?es reduzidas e imunidade ?s interfer?ncias eletromagn?ticas, uma caracter?stica inerente ?s fibras ?pticas. Dentre as fibras, um tipo especial tem sido utilizado na constru??o de biochips SPR para an?lise de intera??es biomoleculares, as chamadas fibras ?pticas microestruturadas (Microstructured Optical Fibers ? MOFs). Estas fibras possuem caracter?sticas geom?tricas que permitem o controle e/ou a manipula??o da propaga??o luz. Altera??es na geometria destas fibras podem causar varia??es na propaga??o da luz, tornandoas interessantes a aplica??es que exploram a intera??o entre elas, biomol?culas e filmes finos met?licos. Este trabalho apresenta um modelo te?rico de biochip ?ptico constru?do a partir de fibras ?pticas microestruturadas em que a resson?ncia de pl?smons de superf?cie ? utilizada como forma de detec??o. O desempenho das configura??es propostas neste estudo ? comparado ao desempenho de configura??es obtidas a partir de fibras microestruturadas comerciais. Tamb?m s?o apresentados os resultados experimentais da metodologia de obten??o do perfil em ?D? utilizado como m?todo de detec??o externa a partir do lixamento da fibra.

The annotated papers that are submitted as part of this thesis consider the phenomenon of colour at the fundamental, technical, and application levels, and they were written and published by Oulton between 1990 and 2009. The papers disclose significant insights by the author into colorimetric modeling theory and report aspects of the author's work that have led to commercially successful practical applications. The academic significance of these papers is evident in their citation record; their practical value is shown by a number of successful industrial collaboration programmes, and through the award of national prizes for innovation by the Worshipful Company of Dyers, and the Society of Dyers and Colorists. The published research primarily concerns digital devices that either capture or reproduce coloured images. For example, the research problem of how to calibrate the colour on computer CRT screens, which was thought at the time to be intractable, was reported by Oulton in paper 1 to be solved at the two to three significant figure level of colorimetric accuracy. This world leading level of accuracy was subsequently confirmed using a comprehensive data set in paper 7, and has been exploited internationally in commercial computer aided design and colour communication systems by Textile Computer Systems Ltd and Datacolor Inc. Further research problems resolved by Oulton in the presented papers include how to predict the colorimetric sensitivity of dye recipes; how to design, test, and fine-tune the spectral response of digital cameras; and how the individual customers in a shop can be tracked automatically to reveal their buying behavior, using coloured CCTV images.The challenge to the standard CIE colorimetric model posed by the results of Dr W.A. Thornton was analyzed and satisfactorily explained by Oulton in papers 2, 3 and 4. It is also shown that Thornton's results do not in any way compromise either the practice of colorimetry based on the CIE Standard Observer, or the validity of its quantifying data sets. It is also additionally shown under the annotation of paper 4 presented here, that the success of the CIE colorimetric model has a clearly demonstrable theoretical basis.In all but one of the presented papers the convention is maintained that the standard CIE XYZ co-ordinate model should be used as the reference basis, when modeling the properties of colour and quantifying its uses. The final paper to be published (and presented here as paper 4) challenges this convention and demonstrates that a context free and formally defined alternative reference basis may be used in colorimetric modeling with significant advantage. It is also shown in paper 4 that under the specified axioms, any cross dependency that is potentially non linear can in principle be resolved into its component scalar and additive relationships, and that the causes of scalar non linearity may be characterized independently from the causes of linearly additive cross dependency. The result is a widely applicable analytical and experimental design method for resolving complex cross dependent relationships in general and in particular, for resolving those between the spectral visual stimuli and the psychophysical response to them.

The thesis deals with colors - their representation in digital devices and how to provide the best color preservation accross different devices. In the first part of the work, the knowledge of colors and human vision is briefly summarized. Then color models and color spaces are elaborated, mainly those device independent. Spectrum of colors viewable or printable on a device - the gamut - is different for every device and there's a need of precise reproduction or record of color. That's why the system of color management is described further and especially the gamut mapping approaches and algorithms are mentioned. In the second part of the work, the implementation of how two algorithms of color gamut mapping (HPMINDE, SCLIP) can be implemented in MATLAB is described. In the third and last part of the work, the results of implemented algorithms are presented and discussed. These results are compared to results of commonly used color gamut mapping technique (Adobe Photoshop).

Building physics as a branch of architecture must ensure an indoor comfort of each user and inhabitant of a building object. This involves, acoustics, indoor thermal conditions and among others also daylighting and artificial lighting of buildings. Light as a particle and an electromagnetic wave, is required by the different aspects of the human organism. It allows the living beings to see, influences skin and bones, the biorhythms, etc. Therefore, it is necessary for the engineering community to predict the correct illuminance and luminance levels acting insides. The thesis deals with such issues. More precisely, it assesses the quality of design tools and methodologies, either against CIE reference cases described in CIE 171/2006 and against real measurements done over the working plane of an indoor space located in the attic of Building D of the Institute of Building Structures, Faculty of Civil Engineering, Brno University of Technology, too. The tools tested throughout the solution of the dissertation did involve three computer programs: RADIANCE, WDLS v3.1 and WDLS v4.1, and one numerographical approach, namely the Daniljuk’s innovated methodology (sometimes even combined with the theories of BRS). In addition several software’s have had been created alongside the process assessment, just to mention the “RADIANCE Script”, “RADIANCE Data Evaluation Script” or “MuuLUX“. The later was written as a communication software allowing the connection of the KONICA-MINOLTA T10 illuminance meter to a computer with the aim of data collection while long term observation. The solution did also require the establishment of a measuring element for the determination of the light reflectance values of surfaces. The solutions, results and conclusions do describe how well did the design approaches deal while predicting the resulting awaited daylight factor levels in points over the working plane.

Este trabalho apresenta uma nova metodologia para mapeamento no espaço de cor colorimétrico CIEXYZ, dos valores de triestímulo obtidos em um espaço de cor não colorimétrico definido pelas curvas de sensibilidade de um sensor eletrônico. A inovação do método proposto é realizar o mapeamento através de três redes neurais artificiais sendo que cada uma é especializada em mapear cores com um determinado triestímulo dominante. É feita a comparação dos resultados do mapeamento com vários trabalhos publicados sobre mapeamento de um espaço de cor em outro usando diversas técnicas. Os resultados mostram a eficiência do método proposto e permitem sua utilização em equipamentos para medir cores, incrementando sua precisão. / This work presents a new method for mapping a non colorimetric color space defined by the sensitivity curves of an electronic color sensor to the colorimetric color space CIEXYZ. The novelty of the proposed method is to perform the mapping by a set of three artificial neural networks, each one specialized in mapping colors with a specific dominant tristimulus. The results are compared with the ones obtained in published works about the mapping of color spaces, using several methods. The results of the method proposed in this work show that it is efficient and it can be used in equipments for measuring colors, improving its precision.

It was investigated the colour reproduction on prints made in ink-jet printer. Experimentally investigated gradation characteristics of CMYK colours. It was made a 26 step strip with raster dots from 0 to 100 %. Prints were made at different printing regimes on papers with different whiteness. Zone optical densities were measured, compared with theoretical density values and gradational distortions were determined. Also were measured 100% raster strips in CIE L*a*b* coordinate system and defined the maximum reproduction of colours in ink-jet printer.

Este trabalho apresenta uma nova metodologia para mapeamento no espaço de cor colorimétrico CIEXYZ, dos valores de triestímulo obtidos em um espaço de cor não colorimétrico definido pelas curvas de sensibilidade de um sensor eletrônico. A inovação do método proposto é realizar o mapeamento através de três redes neurais artificiais sendo que cada uma é especializada em mapear cores com um determinado triestímulo dominante. É feita a comparação dos resultados do mapeamento com vários trabalhos publicados sobre mapeamento de um espaço de cor em outro usando diversas técnicas. Os resultados mostram a eficiência do método proposto e permitem sua utilização em equipamentos para medir cores, incrementando sua precisão. / This work presents a new method for mapping a non colorimetric color space defined by the sensitivity curves of an electronic color sensor to the colorimetric color space CIEXYZ. The novelty of the proposed method is to perform the mapping by a set of three artificial neural networks, each one specialized in mapping colors with a specific dominant tristimulus. The results are compared with the ones obtained in published works about the mapping of color spaces, using several methods. The results of the method proposed in this work show that it is efficient and it can be used in equipments for measuring colors, improving its precision.

V diplomové práci je prezentovaná literární rešerše na téma termochromní pigmenty a jejich aplikace v polymerních matricích. Výzkum byl zaměřen na hlubší pochopení termochromního efektu v pigmentech na bázi molekulárních komplexů. Termochromní pigmenty byly aplikovány do polyuretanového textilního zátěru a bylo zjištěno optimální nastavení podmínek zátěru. Textilní zátěry byly podrobeny termickým zkouškám a zároveň byla pozorována jejich stálobarevnost.