Introdução: Ambliopia é uma alteração neurológica cortical causada por experiência visual anormal durante o período crítico do desenvolvimento visual. Trabalhos recentes vêm demonstrando que além das conhecidas alterações visuais classicamente descritas na ambliopia, como a acuidade visual, inúmeras funções perceptuais da visão (locais e globais) estão afetadas. Objetivo: Analisar e comparar o impacto de diferentes tipos de ambliopia no processamento visual de cor e sensibilidade ao contraste (SC). Material e métodos: Foram estudados 42 indivíduos amblíopes de 7-40 anos (estrabismo n=16, anisometropia n=18 e de causa mista n=8) e 33 controles pareados por idade. Testou-se a visão de cores pela medida de limiar de cromaticidade para os eixos protan, deutan e tritan com o Cambridge Color Test (CCT-v.02), a sensibilidade ao contraste (SC) espacial de luminância de primeira ordem para as frequências espaciais 0,4; 1,6; 3,2; 6,4; 12,8 cpg, segunda ordem para as frequências 0,4; 1,6; 3,2; 6,4 cpg e contraste radial para as frequências espaciais 0,4; 1,6; 3,2; 6,4; 12,8 cpg com o sistema Psyknematix (v.1.4.3. Kybervision Consulting R&D). Resultados: Não houve alteração na discriminação de cores em amblíopes; mas redução de sensibilidade ao contraste para estímulo linear de primeira ordem para a frequência espacial 0,4 cpg (F= 3,24, p= 0,027) nos olhos dominantes dos amblíopes estrábicos e 12,8 cpg (F= 6,71, p= 0,002) nos olhos não dominantes de indivíduos amblíopes por anisometropia e de causa mista; redução da SC de segunda ordem para a frequência espacial 6,4 cpg (F =5,30, p= 0,002) nos olhos não dominantes dos amblíopes anisométropes e mista e redução de SC radial para a frequência espacial 1,6cpg (F= 3,79; p= 0,014), 3,2cpg (F= 2,84; p= 0,044), 6,4cpg (F= 5,19; p= 0,003) e 12,8 cpg (F= 9,80; p< 0,001) nos olhos não dominantes do grupo de ambliopia mista e para a frequência espacial 12,8cpg para todos os grupos de ambliopia em relação aos controles. Conclusão: Não há impacto na discriminação de cores para nenhum tipo de ambliopia. Existem diferentes impactos para a sensibilidade ao contraste de distintos níveis de complexidade entre diferentes tipos de ambliopia, e o tipo mista apresenta pior desempenho para todas as funções, desde as mais elementares às mais complexas / Introduction: Amblyopia is a cortical neural disfunction caused by abnormal visual experience during critical period of visual development. Recent work has shown that beyond deficits on visual acuity many other perceptual visual functions (local and global) are affected. Purpose: To analyze and compare the impact of different types of amblyopia on visual processing of color vision and contrast sensitivity. Methods: We studied 42 amblyopes aged 7-40 years (strabismus n=16, anisometropia n=18 and mixed n=8 ) and 33 age-matched controls. We tested color vision by chromaticity threshold measurement for protan, deutan and tritan axes with Cambridge Color Test (CCT-v.2.0) and spatial contrast sensitivity of luminance (SC) of first order for spatial frequencies (sf) 0.4; 1.6; 3.2; 6.4; 12.8 cpd; second order for frequencies 0.4; 1.6; 3.2; 6.4 cpd and radial contrast for frequencies 0.4; 1.6; 3.2; 6.4; 12.8 cpd with Psyknematix System (v.1.4.3. Kybervision Consulting R&D). Results: Our results demonstrate no alterations on colour discrimination in amblyopes. Decrease of contrast sensitivity for first order stimuli for frequency 0.4 cpd (F = 3.24, p = 0.027) in dominant eyes of strabismic amblyopia and for 12.8 cpd (F = 6.71, p = 0.002) in nondominant eyes of amblyopic individuals with anisometropia and mixed cause; decrease of CS for second order stimuli for 12,8 cpd (F = 5.30, p = 0.002) in nondominant eyes of anisomotropic and mixed amblyopia and decrease of radial SC for frequency 1.6cpd (F = 3.79 , p = 0.014), 3.2cpd (F = 2.84, p = 0.044), 6.4cpd (F = 5.19, p = 0.003) and 12.8 cpd (F = 9.80, p <0.001 ) in non-dominant eyes of mixed amblyopia and for frequency 12.8 cpd for all amblyopia groups compared to control. Conclusion: There is no impact in color discrimination of any group of amblyopia. There are different impacts between types of amblyopia on contrast sensitivity of different levels of complexity. Mixed type presents the worst performance for all functions from the most elementary to the most complex stimuli

Orientador: José Roberto Cury Saad / Resumo: Com o avanço dos materiais cerâmicos e dos sistemas adesivos, aliados a alta exigência estética dos pacientes, restaurações cerâmicas têm sido cada vez mais utilizadas clinicamente. Restaurações cerâmicas realizadas pelo CAD/CAM aliam alta tecnologia com praticidade, especialmente os blocos que não requerem fase de cristalização em forno, obtendo resultados satisfatórios em curto tempo. Este estudo teve como objetivo avaliar a estabilidade de cor, rugosidade superficial e resistência de união de diferentes materiais restauradores do sistema CAD/CAM e uma resina composta. Foram utilizados os blocos cerâmicos na cor A2: Celtra Duo- ZL (Dentsply/Sirona), Enamic - HC (Vita), Lava Ultimate - NC (3M) e Resina Composta Filtek Z350XT- CR (3M). Para os estudos 1 e 2, foram realizados 2 tipos de procedimentos de polimento: borrachas Ceramisté - Standard, Ultra e Ultra II (Shofu); borrachas Ceramisté + pasta porcelize (Cosmedent) + discos de feltro Flexibuff (Cosmedent) e posteriormente realizadas imersões em saliva artificial(S1), café(2) e coca-cola(3). Espécimes para cada grupo (n=10), foram imersos em cada solução armazenada em estufa a 37ºC por 60 dias. As leituras de cor (E) foram realizadas nos tempos inicial, 30 dias, 60 dias e repolimento. As leituras de rugosidade superficial (Ra) foram realizadas inicialmente antes das imersões, após 30 dias e após 60 dias de imersão. Estudo 3 avaliou diferentes técnicas de adesão (acido fluorídrico+silano+adesivo; acido fluorídrico+adesivo u... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Considering the advancement of ceramic materials and adhesive systems, allied to the high esthetic requirement of patients, ceramic restorations have been increasingly used clinically. Ceramic restorations performed by CAD / CAM combine high technology with practicality, especially the blocks that do not require crystallization phase in the oven, obtaining satisfactory results in a short time. This study aimed to evaluate the color stability, surface roughness and bond strength of different CAD / CAM system restorative materials and a composite resin. The ceramic blocks in the A2 color were: Celtra Duo- ZL (Dentsply / Sirona), Enamic-HC (Vita), Lava Ultimate-NC (3M) and Filtek Z350XTCR (3M) Composite Resin. For studies 1 and 2, two types of polishing procedures were performed: Ceramisté - Standard, Ultra and Ultra II rubbers (Shofu); Ceramisté rubbers + paste porcelain (Cosmedent) + Flexibuff felt discs (Cosmedent) and subsequently immersed in artificial saliva (S1), coffee (2) and coke (3). Specimens for each group (n = 10) were immersed in each solution stored in an oven at 37ºC for 60 days. Color readings (E) were performed at the initial, 30 days, 60 days and repolder times. Surface roughness readings (Ra) were performed before immersion, after 30 days and after 60 days of immersion. Study 3 evaluated different adhesion techniques (hydrofluoric acid + silane + adhesive, hydrofluoric acid + universal adhesive, silica sandblasting + silane + adhesive, silica sandblasting + ... (Complete abstract click electronic access below) / Doutor

Racial profiling: Personal experiences that people of color face in Sweden  The purpose of this study is to explore the personal experiences of racial profiling that people of color face in Sweden. Racial profiling is a social issue in the world today and a much-disputed subject in the Swedish society. The study was conducted with qualitative interviews with four people of color in Sweden. The intersectionality perspective was used as an analytical tool to analyze the experiences people of color face with the help of social constructionism theory. The results showed that all four interviewees have experienced racial profiling in different settings in their lives. In addition, the study showed that the interviewees’ experiences of racial profiling differed depending on the interviewees’ identity attributes such as gender, race, and their religious affiliation affecting their vulnerability and experiences of racial profiling. The findings also show that the four informants have experienced and are vulnerable to everyday racism in Sweden due to the existing prejudices in the Swedish society.

Orientador: Sérgio Mauro Romagnolo / Banca: José Paiani Spaniol / Banca: Marco Garaúde Giannotti / Banca: José Leonardo Nascimento / Banca: Tiago Mesquita / Resumo: A tese discute as manifestações cromáticas elaboradas por alguns artistas contemporâneos, brasileiros e estrangeiros, que exploram as potencialidades da cor no seu caráter físico, concreto e material, evidenciando sua ambiguidade e propiciando inovações nos objetos pictóricos. O estudo também apresenta a produção pictórica pessoal, realizada no período de 2006 a 2019. / Abstract: The thesis discusses the chromatic manifestations elaborated by some contemporary artists, Brazilian and foreign, who explore the potential of color in its physical, concrete and material character, showing its ambiguity and providing innovations in pictorial objects. The study also presents personal pictorial production, carried out in the period from 2006 to 2019. / Doutor

Thesis advisor: Lauri Johnson / The purpose of this individual study was to address the gap in research and answer the following research question:  How do educators of color perceive the evaluation process and its impact on their professional growth and development?  It was part of a larger group case study that sought to capture the perceptions of educators of color related to racial disproportionality and its impact on the educator pipeline and schools.  As educators of color work to maintain a presence within the educational system, it is essential to study how perceived biases related to race may impact the evaluation process. This single case study attempted to capture how five administrators of color and five teachers of color employed by the Cityside Public School District perceived the evaluation process used within their district.  Additionally, a document review of union contracts was used to ascertain the evaluation process used by Cityside. The Critical Race Theory tenets of permanence of racism, counter storytelling and critique of liberalism provided a theoretical framework to analyze the responses given by each participant who participated in semi-structured interviews. Findings reveal that the majority of the participants do not believe the evaluation process has improved their growth and development.  Other findings revealed that the racial identity and the level of cultural competency of the evaluator impacted whether or not participants believed their race was a factor in how they were evaluated. / Thesis (EdD) — Boston College, 2018. / Submitted to: Boston College. Lynch School of Education. / Discipline: Educational Leadership and Higher Education.

Le centre coloré NV, constitué d’un atome d’azote et d’une lacune, est un défaut ponctuel du diamant qui se comporte comme un atome artificiel piégé dans cette matrice. Grâce aux propriétés de son spin électronique, qui peut être lu et manipulé comme un système quantique élémentaire, le centre NV as de nombreuses applications comme qubit pour l’information quantique ou comme sonde de champ magnétique. Cependant, ces applications nécessitent de contrôler les propriétés des centres NV ainsi que leur position dans le cristal. Cette thèse examine des méthodes pour atteindre ces objectifs en combinant des techniques d’implantation d’atomes et de croissance assistée par plasma (CVD) de diamant.Le mémoire est divisé en six chapitres. Le premier chapitre résume les propriétés des centres NV, ce qui permet de définir les objectifs principaux dans la fabrication des centres NV. Le chapitre deux montre qu’il est possible de créer un réseau de centres NV par implantation au moyen d’une colonne d’ions focalisés. Cette technique est adaptée à la création de centres NV dans des nanostructures comme des cristaux photoniques ou des pointes de type AFM. Cependant la faible énergie cinétique des ions, nécessaire pour atteindre une résolution meilleure que 10 nm en diamètre de spot, conduit à une implantation proche de la surface ce qui affecte fortement les propriétés des centres NV. Le troisième chapitre examine comment la recroissance d’une couche de diamant sur des centres NV implantés permet de réduire l’impact négatif de la surface. Les quatrième et cinquième chapitres décrivent des méthodes pour la fabrication des centres NV en contrôlant les paramètres de la croissance CVD. Des couches minces fortement dopées avec les centres NV peuvent être créées, et un contrôle quasi parfait de l’orientation de l’axe du centre NV peut être obtenu. Dans l’objectif d’optimiser les propriétés du temps de cohérence du spin, le sixième chapitre étudie comment le spin électronique du centre NV peut être protégé contre les effets de décohérence induits par les spins non-polarisés dans la matrice du diamant. / The Nitrogen-Vacancy (NV) color center is a defect of diamond which behaves as an artificial atom hosted in a solid-state matrix. Due to its electron spin properties which can be read-out and manipulated as an elementary quantum system, the NV center has found a wide panel of applications as a qubit for quantum information and as a magnetic field sensor. However these applications require to control the properties of the NV centers and their localization. This doctoral thesis investigates methods allowing us to tailor the properties of NV centers by combining techniques for the implantation of nitrogen atoms and the plasma-assisted (CVD) synthesis of diamond.The manuscript is divided into six chapters. The first chapter summarizes the properties of the NV center which will set our objectives for the NV engineering. The second chapter will describe how arrays of NV centers can be created using Focused Ion Beam implantation. The results open a wide range of applications for the targeted creation of NV centers in diamond structures such as photonic crystals and tips. However the low kinetic energy which is required for achieving implantation within a spot of 10-nm diameter leads to shallow defects which properties are strongly affected by the sample surface. The third chapter investigates how the overgrowth of a diamond layer over implanted NV centers can remove the detrimental influence of the surface. The fourth and fifth chapters describe effective methods for NV center fabrication through the control of the CVD growth conditions of the hosting crystal. Thin layers with high NV doping can be grown and almost perfect control of the orientation of the NV axis can be achieved. With the goal to optimize the spin coherence properties, the sixth chapter investigates how the electron spin of the NV center can be protected from decoherence effects induced by magnetic noise due to the unpolarized spins in the diamond lattice.

No description available.

The Stroop Color coding and word test (Stroop, 1935) is a well-known phenomenon investigating cognitive inhibition, cognitive speed, attention and cognitive flexibility. The Stroop effect refers when processing a stimulus while being exposed to another stimuli simultaneous interfering with the first (Scarpina &amp; Tagini, 2017). This study focuses on a performance part of the Stroop color coding and word test and its relation to personality traits in the HEAXCO-PR using the Mini-IPIP6 (Ashton &amp; Lee, 2007; Sibely, 2012). An experiment was conducted with the control group ( N = 30 ) solving a Stroop color coding and word test and the experiment group ( N = 30) being exposed to two stimuli (audio and visual) with purpose to induce stress. The result of an independent t-test indicated that you can manipulate the result of a Stroop test measuring two outcome variables (Time and Error). One-way MANCOVA was performed with the personality traits used as covariates. The analysis indicated that Extraversion had a significant small impact on Time (F (1,52) = 6.872, p = .011 η2 = .117) ) and Openness had an effect on Error (F (1,52) = 3.167, p = .008 η2 = .057). Openness showed a significant effect on error rate in the performance. Extraversion showed significant effect as a covariate on the completion time of the test. Time and Error showed a significant correlation. To establish the relationship between cognitive inhibition and personality more research is required. More research is also required for the result of this theoretical study to potentially become applicable.

O projeto narrativas da luz é uma reflexão a respeito do tempo. A pesquisa tem como escopo o campo da poética e seu olhar está voltado para a fotografia, ou seja, é uma investigação sobre o fenômeno da inscrição do tempo na imagem fotográfica. A proposta era produzir imagens onde, mesmo evidenciando a inscrição do tempo, a aparência de instantâneo fosse - na medida do possível - preservada. O expediente adotado foi utilizar a cor da luz e suas intensidades para da visibilidade à passagem do tempo e, fazer derramar lenta e continuamente essas luzes sobre o espaço. Para alcançar esse resultado foi necessário projetar e construir um dispositivo fotográfico singular que envolve recursos de mecânica, eletrônica, matemática e computação. O resultado é uma série fotográfica - que continua em processo - e alguns desdobramentos que surgiram a partir dessas fotografias. A série resultante é constituída de imagens com 10 metros ou mais de extensão que rompem, de várias maneiras com o paradigma da fotografia. / The project \"narratives of light\" is a reflection on time. The research is scoped to the field of poetry and the gaze is focused on photography, in other words, it is an investigation on the phenomenon of inscription of time in the photographic image. The proposal was to produce images where even showing the inscription of time the snapshot look - as far as possible - would still be there. The expedient adopted was to use the color of light and its intensity to give visibility to the passing time by pouring slowly and continuously these lights over the space. In order to achieve such an outcome it was necessary to design and build a unique photographic device that involves mechanical features, electronics, mathematics and computing. The outcome is a photographic series - which is still in process - and a few unfoldings that emerged from these photographs. The resulting series consists of images with 10 meters or more in length that break, in many different ways, the photography paradigm.

A utilização da quitosana como fixante de corantes tem se mostrado relevante, devido a sua estrutura química que é responsável pelas suas propriedades biodegradável e antibacteriana. O presente estudo teve como objetivo principal utilizar a quitosana para auxiliar na fixação de corantes pigmentados utilizados na estamparia digital. Também foi testada a carboximetilcelulose. A quitosana foi dissolvida em ácido acético 2% (v/v) nas concentrações de 5, 10, 15 e 22,2 g/L, enquanto a carboximetilcelulose foi dissolvida em água na concentração de 14,28 g/L Os polímeros foram aplicados como pré e pós tratamentos em malha de algodão por dois processos diferentes, via Foulard e por estamparia de quadros. A presença dos polímeros impregnados nas fibras de algodão foi avaliada por Microscopia Eletrônica de Varredura (MEV). As amostras de malha tratadas e não tratadas (controle) foram lavadas por 54 vezes simulando o uso de uma camiseta durante um ano e avaliadas em espectrofotômetro quanto à solidez da cor a lavagem utilizando os parâmetros escala cinza e sistema CIELAB E*. Os resultados obtidos mostraram que a utilização da quitosana e da carboximetilcelulose como pós-tratamento melhoraram o desempenho da solidez da cor a lavagem em 64% quando avaliada por CIELAB E* e 68% respectivamente quando avaliada por escala cinza. As amostras com aplicação de quitosana e carboximetilcelulose como pré-tratamentos apresentaram valores menores de solidez, quando comparadas às amostras pós-tratadas / The use of chitosan as binder has become relevant due to its chemical structure which is responsible for its biodegradable and antibacterial good. The present study is aimed to the use of chitosan to aid in the fixation of pigmented dyes used in digital printing. A carboxymethylcellulose was also tested. The chitosan was dissolved in 2% (v / v) acetic acid at the concentrations of 5, 10, 15 and 22.2 g / L, while a carboxymethylcellulose was dissolved in water at 14.28 g / L. applied as pre and post treatments in cotton mesh by two different processes, Foulard and silk-screen. The presence of polymers impregnated in the cotton fibers was evaluated by Scanning Electron Microscopy (SEM). The treated and untreated mesh samples were washed 54 times simulating the use of a T-shirt for one year and evaluated in spectrophotometer for color fastness to wash, using the CIELAB E * system. The results showed that the use of chitosan and carboxymethylcellulose as a post-treatment improved the color wash performance in 64% when evaluated by CIELAB E * and 68% when evaluated by gray scale. The samples with application of chitosan and carboxymethylcellulose as pre-treatments presented lower values of color fastness, when compared to the post-treated samples