Made available in DSpace on 2014-06-11T19:35:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-12-19Bitstream added on 2014-06-13T20:25:52Z : No. of bitstreams: 1 mancuso_dn_dr_araca.pdf: 1122957 bytes, checksum: f6980a1d234a3c5f607d0c22249241c6 (MD5) / Este estudo teve como objetivo avaliar a absorção, solubilidade, dureza e alteração de cor de reembasadores resilientes após termociclagem. Foram utilizados 4 materiais reembasadores resilientes, sendo 1 à base de resina (Trusoft) e 3 à base de silicone (Dentusil, Ufi Gel P e Ufi Gel SC). Foram confeccionadas 80 amostras no total, sendo que metade delas foi submetida ao teste de absorção e solubilidade e a outra metade, aos testes de dureza Shore A e alteração de cor. Todas as amostras foram submetidas à 2000 ciclos de termociclagem. O Dentusil apresentou os seguintes valores: Shore A (40,50); ΔE (0,83); absorção (0,30); solubilidade (0,01). Já o Trusoft apresentou os seguintes valores: Shore A (18,50); ΔE (3,92); absorção (1,48); solubilidade (1,26). O UfiGel P e SC apresentaram resultados semelhantes e intermediarios para os 3 testes. Portanto conclui-se que todas as propriedades estão intimamente relacionadas e que quanto maior for a dureza inicial do material, menor será a absorção e solubilidade e consequentemente menor será a alteração de cor. / The purpose of this study was to investigate absorption, solubility, hardness and colour change of 4 soft liners after thermocycling. A resin base (Trusoft) and three silicone base (Dentusil, Ufi Gel P e Ufi Gel SC) were used on this research. A total of eighty samples were manufactured: forty for absorption and solubility test and forty for both hardness and colour change tests. All samples were subjected to 2000 hours of thermocycling. Dentusil showed the following values: Shore A hardness (40.50), colour change (ΔE=0.83), absorption (0.30) and solubility (0.01). Trusoft, on the other hand, showed the following values: Shore A hardness (18.50), colour change (ΔE=3.92), absorption (1.48) and solubility (1.26). Both UfiGel P and SC showed similar results for all three tests. All properties are linked and as big is the initial hardness, small will be both absorption and solubility and consequently small will be the colour change.

abstract: This quantitative, quasi-experimental study examined the effectiveness of three types of online guided-practice activities designed to increase learning of visual art concepts, the color concepts of hue, tint, shade, value, and neutral colors in particular, among fifth grade students in a large school district in the southwestern United States. The study's results indicated that, when students were given a limited amount of time to engage in practice activities, there was no statistically significant difference among the three types of guided practice and the control group. What was effective, however, was the instructional component of this study's instruments. / Dissertation/Thesis / Doctoral Dissertation Curriculum and Instruction 2014

abstract: Nanowires are one-dimensional (1D) structures with diameter on the nanometer scales with a high length-to-diameter aspect ratio. Nanowires of various materials including semiconductors, dielectrics and metals have been intensively researched in the past two decades for applications to electrical and optical devices. Typically, nanowires are synthesized using the vapor-liquid-solid (VLS) approach, which allows defect-free 1D growth despite the lattice mismatch between nanowires and substrates. Lattice mismatch issue is a serious problem in high-quality thin film growth of many semiconductors and non-semiconductors. Therefore, nanowires provide promising platforms for the applications requiring high crystal quality materials. With the 1D geometry, nanowires are natural optical waveguides for light guiding and propagation. By introducing feedback mechanisms to nanowire waveguides, such as the cleaved end facets, the nanowires can work as ultra-small size lasers. Since the first demonstration of the room-temperature ultraviolet nanowire lasers in 2001, the nanowire lasers covering from ultraviolet to mid infrared wavelength ranges have been intensively studied. This dissertation focuses on the optical characterization and laser fabrication of two nanowire materials: erbium chloride silicate nanowires and composition-graded CdSSe semiconductor alloy nanowires. Chapter 1 – 5 of this dissertation presents a comprehensive characterization of a newly developed erbium compound material, erbium chloride silicate (ECS) in a nanowire form. Extensive experiments demonstrated the high crystal quality and excellent optical properties of ECS nanowires. Optical gain higher than 30 dB/cm at 1.53 μm wavelength is demonstrated on single ECS nanowires, which is higher than the gain of any reported erbium materials. An ultra-high Q photonic crystal micro-cavity is designed on a single ECS nanowire towards the ultra-compact lasers at communication wavelengths. Such ECS nanowire lasers show the potential applications of on-chip photonics integration. Chapter 6 – 7 presents the design and demonstration of dynamical color-controllable lasers on a single CdSSe alloy nanowire. Through the defect-free VLS growth, engineering of the alloy composition in a single nanowire is achieved. The alloy composition of CdSxSe1-x uniformly varies along the nanowire axis from x=1 to x=0, giving the opportunity of multi-color lasing in a monolithic structure. By looping the wide-bandgap end of the alloy nanowire through nanoscale manipulation, the simultaneous two-color lasing at green and red colors are demonstrated. The 107 nm wavelength separation of the two lasing colors is much larger than the gain bandwidth of typical semiconductors. Since the two-color lasing shares the output port, the color of the total lasing output can be controlled dynamically between the two fundamental colors by changing the relative output power of two lasing colors. Such multi-color lasing and continuous color tuning in a wide spectral range would eventually enable color-by-design lasers to be used for lighting, display and many other applications. / Dissertation/Thesis / Doctoral Dissertation Electrical Engineering 2015

abstract: Sexual and social signals have long been thought to play an important role in speciation and diversity; hence, investigations of intraspecific communication may lead to important insights regarding key processes of evolution. Though we have learned much about the control, function, and evolution of animal communication by studying several very common signal types, investigating rare classes of signals may provide new information about how and why animals communicate. My dissertation research focused on rapid physiological color change, a rare signal-type used by relatively few taxa. To answer longstanding questions about this rare class of signals, I employed novel methods to measure rapid color change signals of male veiled chameleons Chamaeleo calyptratus in real-time as seen by the intended conspecific receivers, as well as the associated behaviors of signalers and receivers. In the context of agonistic male-male interactions, I found that the brightness achieved by individual males and the speed of color change were the best predictors of aggression and fighting ability. Conversely, I found that rapid skin darkening serves as a signal of submission for male chameleons, reducing aggression from winners when displayed by losers. Additionally, my research revealed that the timing of maximum skin brightness and speed of brightening were the best predictors of maximum bite force and circulating testosterone levels, respectively. Together, these results indicated that different aspects of color change can communicate information about contest strategy, physiology, and performance ability. Lastly, when I experimentally manipulated the external appearance of chameleons, I found that "dishonestly" signaling individuals (i.e. those whose behavior did not match their manipulated color) received higher aggression from unpainted opponents. The increased aggression received by dishonest signalers suggests that social costs play an important role in maintaining the honesty of rapid color change signals in veiled chameleons. Though the color change abilities of chameleons have interested humans since the time of Aristotle, little was previously known about the signal content of such changes. Documenting the behavioral contexts and information content of these signals has provided an important first step in understanding the current function, underlying control mechanisms, and evolutionary origins of this rare signal type. / Dissertation/Thesis / Doctoral Dissertation Biology 2015

abstract: Color as a communication medium plays an important role in conveying meaning. It has been identified as a major element in marketing and advertising, and has shown to influence consumer's emotions (Labrecque & Milne, 2012). Despite the large volume of color-centered research, the literature on the subject remains largely abstract and unreliable. Academic research on the impact of color on brand personality it is still in its early stages of investigation, and therefore fragmented and inadequate. The goal of this study is to identify and visually represent patterns of association between colors and specific brand personality traits. We hypothesized that such patterns exist, although the exact associations are difficult to predict. If such patterns are found, they can assist in creating a valuable design tool with wide range of applications in product design, manufacturing, and marketing. / Dissertation/Thesis / Masters Thesis Human Systems Engineering 2017

Orientador: Leonor de Castro Monteiro Loffredo / Banca: Maximiliano Piero Neisser / Banca: Camila Pinelli / Resumo: Por anos, os métodos de escolha de cor em odontologia têm sido realizados de forma subjetiva, baseados em experiências clínicasparticulares, sem nenhum embasamento científico. Com o aumento dos procedimentos estéticos restauradores, existe a preocupação na escolha da cor, cuja determinação envolve as técnicas visual e instrumental. A técnica visual é realizada com o auxílio de escalas de referências, e a técnica instrumental é realizada com o auxílio de espectrofotômetros, colorímetros e software de análise de imagens. Com o avanço tecnológico em equipamentos e com o auxílio de softwareque auxiliam na precisão da cor da imagem digital, este trabalho utilizou o softwareAdobe Photoshop 7.0, com o objetivo de avaliar a utilidade, na prática clínica, da máquina fotográfica digital para seleção de cor segundo a escala Vita LuminVaccum. Inicialmente, foi utilizada uma máquina amadora e dois examinadores fizeram a aferição, sendo realizado um estudo de correlação intra-classe para avaliação de concordância interexaminador. Concluiu-se que a análise computacional de imagens digitais pode ser usada para analisar guias de cores pelo sistema CIE LAB, assim como é confiável, sendo a diferença de cor entre os dois observadores clinicamente aceitável. Adicionalmente, por meio de uma máquina fotográfica profissional, foram comparados os modos manual e automático, para saber se a diferença de cor (ΔE) promovida por eles teve relevância clínica. Concluiu-se que, para as guias B1, B3 e C4 poderão ser usados quaisquer modos de câmera digital (manual ou automático), diferente do observado para a guia A3.5 / Abstract: For years, the methods of choice of color in dentistry, have been made subjectively, based on individual clinical experience, without any scientific basis. With the increase in esthetic restorations, the most sought in recent decades, for better color choice are the visualand instrumental techniques. The visual technique is performed with the aid of references, and the scales of instrumental technique are performed with the aid of spectrophotometers, colorimeters and image analysis software. Due to technological advances in equipment and due to the development ofsoftwares that improve precision in color of the captured digital image, the present study aimed to use the Adobe Photoshop 7.0 software, in order to evaluate the usefulness of the digital camerain clinical practice, when selecting color according to the Vita LuminVaccum scale.Interobserver agreement was verified when two examiners evaluated the coordinates L*, a* and b*, by using an unprofessional camera. Intraclass correlation coefficient was applied to verify interobserver agreement.It can be concluded that the computer analysis of photographic images can be used to analyze the color guides by means of the CIE L*a*b* system, as it was reliable and also because the color difference between the two observers was clinically acceptable. In relation of the use of a professional digital camera to verify the difference in color promoted by the manual and by the automatic mode, it can be concluded that for the guides B1, B3, and C4 any modes could be used, differently of the observed for the guide A3.5 / Mestre

Orientador: Mário Tanomaru Filho / Resumo: Materiais reparadores e cimentos endodônticos não devem promover alteração da coloração dental. Este estudo foi dividido em 3 publicações. Publicação 1 - avaliação da alteração cromática dentária promovida por cimentos de silicato tricálcico (TSC) associado com óxido de bismuto (TC-Bi), óxido de zircônio (TC-Zr), óxido de nióbio (TC-Nb) e Biodentine (BD). Publicação 2 - comparação dos efeitos cromáticos induzidos por cimentos TSC-Bi e silicato tricálcio com tungstato de cálcio (TSC-TC), MTA Angelus (MTA) e MTA HP Repair (MTAHP). Publicação 3 - avaliação das alterações cromáticas por cimentos endodônticos, AH Plus (AHP), MTA Fillapex (MTAF), Total Fill BC Sealer (TF) e NeoMTA Plus (NMTAP). Dentes bovinos (n=10) foram seccionados para obtenção de secções vestibulares e palatinos. Na face interna vestibular foram realizadas duas cavidades, uma na porção coronária e outra radicular, que foram preenchidas pelos materiais em estudo e com pasta triantibiótica como controle positivo (CP) e cavidades sem material como controle negativo (CN). A mensuração da alteração cromática (∆E) e luminosidade (L*) foram realizadas com espectrofotômetro, antes da inserção dos materiais (T0), imediatamente após a inserção (T1) e após 7 (T7), 15 (T15), 30 (T30), 60 (T60), 120 (T120) e 180 (T180) dias. Os dados foram avaliados por meio de teste de Análise de Variância de medidas repetidas a dois critérios e Post Hoc teste LSD-Fisher, ambos com nível de significância de 5%. Publicação 1 - na porção cor... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Repair materials and endodontic sealers should not promote tooth staining. This study was divided into 3 publications. Publication 1 - evaluation of dental discoloration of tricalcium silicate (TSC) cements associated with bismuth oxide (TC-Bi), zirconium oxide (TC-Zr), niobium oxide (TC-Nb) and Biodentine (BD). Publication 2 - comparison of the color effects induced by TSC-Bi cements and tricalcium silicate with calcium tungstate (TSC-TC), MTA Angelus (MTA) and MTA HP Repair (MTAHP). Publication 3 - evaluation of color changes by endodontic cements, AH Plus (AHP), MTA Fillapex (MTAF), Total Fill BC Sealer (TF) and NeoMTA Plus (NMTAP). Bovine teeth were sectioned to obtain vestibular and palatine sections. In the internal vestibular face, two cavities were performed, one in the coronary portion and the other one in the root, which were filled with the materials, and triantibiotic paste as the positive control (CP) and cavities with no filling as the negative control (CN). The measurement of the color change (ΔE) was performed with a spectrophotometer, before insertion of the materials (T0), immediately after insertion (T1) and after 7 (T7), 15 (T15), 30 (T30), 60 (T60), 120 (T120) and 180 (T180) days. The data were evaluated by Variance Analysis of repeated measurements at two criteria and Post Hoc LSD-Fisher test, both with a significance level of 5%. Publication 1 - in the coronary portion TSC and CP presented higher ΔE in T180 compared to T1 (p <0,05). Only TSC-Zr and TSC-... (Complete abstract click electronic access below) / Mestre

Made available in DSpace on 2014-06-11T19:22:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-06-17Bitstream added on 2014-06-13T19:48:49Z : No. of bitstreams: 1 broggiato_fc_me_ia.pdf: 1793369 bytes, checksum: d1db97efd02420fa1d1f2697e1e72126 (MD5) / Esta dissertação trata de como a pintura, no decorrer do século XX, deixou de ser vista como um espaço virtual, ilusionista, para ser concebida em sua literalidade, como uma superfície plana. Esta pesquisa tem dois resultados distintos: a produção, entre 2009 e 2011, de uma série de pinturas e o desenvolvimento de um texto. O texto, por sua vez, é dividido em duas partes: na primeira, apresento e procuro analisar minha obra pictórica recente, e na segunda, desenvolvo, em três capítulos, reflexões sobre a relação entre o espaço da pintura, o espaço do teatro e o espaço dos objetos comuns, destacando a influência que os readymades de Marcel Duchamp e o minimalismo norte-americano exercem sobre a pintura contemporânea. Nesse contexto, analiso visões dos críticos Michael Fried, Clement Greenberg, Ferreira Gullar, Leo Steinberg e Alberto Tassinari / This dissertation discusses how the art of painting, during the twentieth century, ceases to be seen as a virtual illusionist space, to be conceived in a literal way, as a flat surface. This research has two distinct outcomes: the production of a series of paintings (between 2009 and 2011) and also the development of a text. The text, in turn, is divided in two parts: in the first part I present and try to analyze my recent pictorial work; in the second part, which is divided in three chapters, I reflect upon the relationship between the space of painting, the theater space and the space of common objects, highlighting the influence of Marcel Duchamp’s readymades and North-American minimal art on contemporary painting. In this context, I analyze the views of the critics Michael Fried, Clement Greenberg, Gullar, Leo Steinberg and Alberto Tassinari

Made available in DSpace on 2014-06-11T19:24:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-15Bitstream added on 2014-06-13T18:51:41Z : No. of bitstreams: 1 takatsui_f_me_arafo.pdf: 767458 bytes, checksum: cdfc1503244cefbd6a145a45a2d6340a (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Por anos, os métodos de escolha de cor em odontologia têm sido realizados de forma subjetiva, baseados em experiências clínicasparticulares, sem nenhum embasamento científico. Com o aumento dos procedimentos estéticos restauradores, existe a preocupação na escolha da cor, cuja determinação envolve as técnicas visual e instrumental. A técnica visual é realizada com o auxílio de escalas de referências, e a técnica instrumental é realizada com o auxílio de espectrofotômetros, colorímetros e software de análise de imagens. Com o avanço tecnológico em equipamentos e com o auxílio de softwareque auxiliam na precisão da cor da imagem digital, este trabalho utilizou o softwareAdobe Photoshop 7.0, com o objetivo de avaliar a utilidade, na prática clínica, da máquina fotográfica digital para seleção de cor segundo a escala Vita LuminVaccum. Inicialmente, foi utilizada uma máquina amadora e dois examinadores fizeram a aferição, sendo realizado um estudo de correlação intra-classe para avaliação de concordância interexaminador. Concluiu-se que a análise computacional de imagens digitais pode ser usada para analisar guias de cores pelo sistema CIE LAB, assim como é confiável, sendo a diferença de cor entre os dois observadores clinicamente aceitável. Adicionalmente, por meio de uma máquina fotográfica profissional, foram comparados os modos manual e automático, para saber se a diferença de cor (ΔE) promovida por eles teve relevância clínica. Concluiu-se que, para as guias B1, B3 e C4 poderão ser usados quaisquer modos de câmera digital (manual ou automático), diferente do observado para a guia A3.5 / For years, the methods of choice of color in dentistry, have been made subjectively, based on individual clinical experience, without any scientific basis. With the increase in esthetic restorations, the most sought in recent decades, for better color choice are the visualand instrumental techniques. The visual technique is performed with the aid of references, and the scales of instrumental technique are performed with the aid of spectrophotometers, colorimeters and image analysis software. Due to technological advances in equipment and due to the development ofsoftwares that improve precision in color of the captured digital image, the present study aimed to use the Adobe Photoshop 7.0 software, in order to evaluate the usefulness of the digital camerain clinical practice, when selecting color according to the Vita LuminVaccum scale.Interobserver agreement was verified when two examiners evaluated the coordinates L*, a* and b*, by using an unprofessional camera. Intraclass correlation coefficient was applied to verify interobserver agreement.It can be concluded that the computer analysis of photographic images can be used to analyze the color guides by means of the CIE L*a*b* system, as it was reliable and also because the color difference between the two observers was clinically acceptable. In relation of the use of a professional digital camera to verify the difference in color promoted by the manual and by the automatic mode, it can be concluded that for the guides B1, B3, and C4 any modes could be used, differently of the observed for the guide A3.5

Made available in DSpace on 2014-06-11T19:24:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-12-20Bitstream added on 2014-06-13T19:10:20Z : No. of bitstreams: 1 rodriguesneto_e_me_arafo.pdf: 296469 bytes, checksum: 46a2478fea941cbd45701b60eb5dbff8 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O presente trabalho teve como objetivo avaliar o efeito do selante de superfície sobre a translucidez da resina composta, em função das soluções e do tempo de imersão. Para isso foram selecionados os seguintes materiais: resina composta Charisma; selante de superfície Fortify; e quatro soluções para imersão, café, Coca-Cola®, chá e Saliva Artificial. Foram confeccionados 8 corpos-de-prova para cada condição experimental, totalizando 64 corpos-de-prova. A partir disso, os mesmos permaneceram imersos em saliva artificial, mantidos em estufa a uma temperatura de 37ºCl 1, e foram retirados da estufa para imersão nas soluções testadas, três vezes ao dia por um período de cinco minutos, e após este período foram lavados em água corrente e novamente imersos em saliva artificial, até o momento determinado para a leitura da translucidez. As leituras foram realizadas em nove níveis: T1 - após a confecção dos corpos-de-prova, T2 - 24 horas após a imersão nas soluções, T3 - 48 horas após, T4 a T9, sendo respectivamente 7, 14, 21, 30, 60 e 90 dias após a imersão. Para a obtenção dos valores de translucidez (em porcentagem) foi utilizado o aparelho JOUAN. Os resultados obtidos foram submetidos à Análise de Variância e ao Teste de Tukey a 5%. Observou-se que as soluções influenciaram na translucidez dos materiais (p<0,001), sendo que o café apresentou maior ação pigmentante, seguido pelo chá, Coca-Cola® e saliva artificial. Com relação ao tempo notou-se que a partir de T5 houve uma significante alteração (p<0,001) na translucidez da resina até T8. E quanto ao selante o grupo selado apresentou maiores valores de translucidez (p<0,05) do que o grupo não selado. Mediante a metodologia aplicada pode-se concluir que o café foi a solução que promoveu maior alteração de translucidez, a resina composta sofreu alteração significativa... . / The aim of the current study was to evaluate the surface sealant effect upon the composite resin translucence, related to different solutions and immersion periods. The following materials were selected: Charisma composite resin; Fortify surface sealant; and four immersion solutions, which are coffee, Coca-Cola®, tea and Artificial Saliva. Eight test specimens were manufactured for each experimental condition, totaling 64 test specimens. All the specimens were immersed in artificial saliva and maintained in a kiln at 37ºCl 1, being then removed for a five-minute immersion period three times a day in the solutions tested, after which they were washed with tap water and immersed in artificial saliva once more until the translucence reading was performed. The readings were performed in nine levels: T1 - after test specimens manufacture, T2 - 24 hours after the immersion in the solutions, T3 - 48 hours after the immersion, T4 to T9, respectively 7, 14, 21, 30, 60 and 90 days after the immersion. In order to achieve translucence scores (in percentage), the appliance JOUAN was used. The results obtained were submitted to the Analysis of Variance and to Tukey's test at 5%. It was possible to observe that the solutions influenced on the materials translucence (p<0.001), and that coffee showed the most staining action, followed by tea, Coca-Cola® and artificial saliva. In regard to time, a significant alteration (p<0.001) was noticed in the composite resin from T5 up to T8. Considering the sealant, the sealed group showed higher scores of translucence (p<0.05) than the non-sealed group. According to the methodology applied, it is possible to conclude that coffee was the solution which provided the most intense translucence alteration, the composite resin underwent a significant alteration in translucence after 21 days of... (Complete abstract, click electronic address below).