Página 1 dos resultados de 18 itens digitais encontrados em 0.028 segundos

## Violência na gestação e saúde mental de mulheres que são vítimas de seus parceiros; Violence during pregnancy and the mental health of women victims of their partners

Fonseca-Machado, Mariana de Oliveira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 15/05/2014 Português
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Este estudo teve como objetivo verificar as repercussões da violência por parceiro íntimo, ocorrida durante a atual gestação, na saúde mental de mulheres usuárias de um serviço de atendimento pré- natal. Trata-se de estudo observacional, com delineamento transversal, desenvolvido no Centro de Referência da Saúde da Mulher de Ribeirão Preto, São Paulo, Brasil, com 358 gestantes, em acompanhamento pré-natal no serviço, entre maio de 2012 e maio de 2013. A coleta dos dados aconteceu no dia da primeira consulta de pré-natal das gestantes no serviço, por meio de sete instrumentos: i. instrumento de caracterização sociodemográfica, econômica e comportamental; ii. instrumento de caracterização obstétrica; iii. Edinburgh Postnatal Depression Scale; iv. Post-Traumatic Stress Disorder Checklist - Civilian Version; v. Escala de Ideação Suicida de Beck; vi. Inventário de Ansiedade Traço-Estado; vii. Instrumento de identificação e caracterização da violência. Os dados foram analisados no software Statistical Package for Social Sciences, versão 21.0. Utilizamos as análises univariada, bivariada e multivariada dos dados, por meio da distribuição de frequências absolutas e relativas...

## Rapid assessment of fruit-color selection by birds using artificial fruits at local scale in Central Amazonia

Arruda,Rafael; Rodrigues,Domingos J.; Izzo,Thiago J.
Fonte: Instituto Nacional de Pesquisas da Amazônia Publicador: Instituto Nacional de Pesquisas da Amazônia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2008 Português
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Modeling clays have been used in several ecological experiments and have proved to be an important tool to variables control. The objective of our study was to determine if fruit color in isolated and grouped displays influences the fruit selection by birds in the field using artificial fruits. Data were collected in six plots distributed homogeneously in 3 km long trails with a minimum distance of 0.5 km. We used a paired experimental design to establish our experiments, so that all treatments were available to the local bird community in each plot. Overall, red was more pecked than brown and white. Isolated red and brown displays were significantly more pecked than others display. Even though our study was conducted in small spatial scales, artificial fruits appeared to be efficient in register fruit consumption attempts by bird. Although inconclusive about selective forces that sharp the dynamics of fruit color polymorphisms and choice by frugivorous birds, our findings corroborate recent studies wherein birds showed preferences by high- over low-contrast fruit signals.

## Mixing efficiency in side-vented coating equipment

Smith, George W.; Macleod, Graeme S.; Fell, John T.
Fonte: Springer-Verlag Publicador: Springer-Verlag
Tipo: Artigo de Revista Científica
Publicado em 02/07/2003 Português
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The purpose of this study was to evaluate tablet mixing within side-vented coating equipment by assessing the development of color uniformity during coating. A colorimetric method was used to evaluate the time for uniform coating for different mixing baffle systems at different scales of equipment. The influence of tablet size was also determined. The inclusion of rabbit ear baffles in the small-scale equipment reduced the time to achieve color uniformity by 20 minutes. The design of baffle influenced the time for uniform color with a mixing efficiency rank order of tubular > ploughshare > rabbit ear. Upon scale-up, the efficiency of mixing seen at development scale remained equivalent in terms of the influence of baffle design. The study into the influence of tablet size revealed the importance that the total batch surface area has on the time taken to achieve color uniformity, with 7-mm diameter tablets having a higher surface area for an equivalent volume of product and taking 15 to 20 minutes longer to achieve color uniformity than 16-mm diameter tablets.

## Quantum Dots for In Vivo Small-Animal Imaging

Bentolila, Laurent A.; Ebenstein, Yuval; Weiss, Shimon
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Português
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Nanotechnology is poised to transform research, prevention, and treatment of cancer through the development of novel diagnostic imaging methods and targeted therapies. In particular, the use of nanoparticles for imaging has gained considerable momentum in recent years. This review focuses on the growing contribution of quantum dots (QDs) for in vivo imaging in small-animal models. Fluorescent QDs, which are small nanocrystals (1–10 nm) made of inorganic semiconductor materials, possess several unique optical properties best suited for in vivo imaging. Because of quantum confinement effects, the emission color of QDs can be precisely tuned by size from the ultraviolet to the near-infrared. QDs are extremely bright and photostable. They are also characterized by a wide absorption band and a narrow emission band, which makes them ideal for multiplexing. Finally, the large surface area of QDs permits the assembly of various contrast agents to design multimodality imaging probes. To date, biocompatible QD conjugates have been used successfully for sentinel lymph node mapping, tumor targeting, tumor angiogenesis imaging, and metastatic cell tracking. Here we consider these novel breakthroughs in light of their potential clinical applications and discuss how QDs might offer a suitable platform to unite disparate imaging modalities and provide information along a continuum of length scales.

## Efficacy and Safety of Clindamycin Phosphate 1.2% and Tretinoin 0.025% Gel for the Treatment of Acne and Acne-induced Post-inflammatory Hyperpigmentation in Patients with Skin of Color

Callender, Valerie D.; Young, Cherie M.; Kindred, Chesahna; Taylor, Susan C.
Fonte: Matrix Medical Communications Publicador: Matrix Medical Communications
Tipo: Artigo de Revista Científica
Publicado em /07/2012 Português
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Objective: To assess the efficacy and safety of a topical gel containing clindamycin 1.2% and tretinoin 0.025% for the treatment of acne and acne-induced postinflammatory hyperpigmentation (PIH) in darker skinned patients. Design: Randomized, double-blind, placebo-controlled study. Setting: Two United States clinical sites. Participants: Thirty-three patients 12 years of age or older with skin types IV to VI, mild-to-moderate facial acne, and PIH were enrolled. Measurements: Patients applied clindamycin phosphate/tretinoin gel or a nonmedicated vehicle each evening and a sun protection factor 30 sunscreen daily. Changes in skin erythema and hyperpigmentation were measured using a chromameter and photographic images. Efficacy was assessed using the Evaluators Global Acne Severity Scale, lesion counts, Post-inflammatory Hyperpigmentation Severity Scales and Patient’s Global Assessment Scale. Safety and tolerability were assessed by adverse event reports and a Safety Assessment Scale. Results: The mean (SD) baseline inflammatory lesion count was 11.9 (11.1) in clindamycin/tretinoin-treated patients, decreasing by 5.5 (6.56) after 12 weeks while the mean baseline inflammatory lesion count was 13.6 (11.15) in placebo-treated patients...

## Absence of red structural color in photonic glasses, bird feathers, and certain beetles

Magkiriadou, Sofia; Park, Jin-Gyu; Kim, Young-Seok; Manoharan, Vinothan N.
Fonte: American Physical Society (APS) Publicador: American Physical Society (APS)
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
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Colloidal glasses, bird feathers, and beetle scales can all show structural colors arising from short-ranged spatial correlations between scattering centers. Unlike the structural colors arising from Bragg diffraction in ordered materials like opals, the colors of these photonic glasses are independent of orientation, owing to their disordered, isotropic microstructures. However, there are few examples of photonic glasses with angle-independent red colors in nature, and colloidal glasses with particle sizes chosen to yield structural colors in the red show weak color saturation. Using scattering theory, we show that the absence of angle-independent red color can be explained by the tendency of individual particles to backscatter light more strongly in the blue. We discuss how the backscattering resonances of individual particles arise from cavity-like modes and how they interact with the structural resonances to prevent red. Finally, we use the model to develop design rules for colloidal glasses with red, angle-independent structural colors.; Physics

## Alterações da função visual e da qualidade de vida relacionada com a saúde em indivíduos idosos

Marques, Gonçalo Bruno Fernandes
Fonte: Faculdade de Ciências Médicas. Universidade Nova de Lisboa Publicador: Faculdade de Ciências Médicas. Universidade Nova de Lisboa
Tipo: Dissertação de Mestrado
Publicado em //2012 Português
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RESUMO: Introdução: A visão é um sentido fundamental na relação do indivíduo com os mais variados ambientes, sendo elemento central na funcionalidade e independência do idoso, qualquer perturbação da função visual provoca limitações na qualidade de vida. As alterações demográficas em curso caracterizam-se pelo envelhecimento progressivo da população, paralelamente constata-se um aumento da prevalência de perturbações do sistema visual com alteração da função e do funcionamento visual. Considerando que os indivíduos idosos são mais dependentes da visão, e que não existem para esta área estudos desenvolvidos em Portugal, esta investigação tem como fundamento analisar a influência que a perturbação da função visual em indivíduos com 65 ou mais anos tem na qualidade de vida relacionada com a saúde. Estudaram-se também as características sócio-demográficas dos indivíduos participantes, da saúde visual e a percepção da saúde geral, bem como identificaram se junto dos idosos participantes e de Médicos especialistas em Medicina Geral e Familiar perspectivas sobre perturbações da função visual e envelhecimento. Desenho de estudo: Estudo transversal, caso-controlo e descritivo-exploratório. Materiais e Métodos: A partir de uma população de 112 indivíduos com 65 ou mais anos...

## Plasmonic interaction of light with negative index and gold nano-checkerboards

Chakrabarti, Sangeeta; Ramakrishna, S. Anantha; Shukla, Neeraj; Guenneau, Fanny; Kadic, Muamer; Guenneau, Sebastien; Enoch, Stefan
Tipo: Artigo de Revista Científica
Publicado em 18/02/2011 Português
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Negative refractive index materials (NRIM) make possible unique effects such as a convergent at lens due to the reversed Snell-Descartes laws of refraction. NRIM are also known to be able to support a host of surface plasmon states for both polarizations of light which are responsible for the sub-wavelength image resolution achieved by a slab of NRIM. A generalized lens theorem provides us with a class of spatially varying slab lenses satisfying the prerequisite symmetries to fold the optical space onto itself. This theorem can be derived using powerful tools of transformational optics. A paradigm of such complementary media are checkerboards consisting of alternating cells of positive and negative refractive index that represent a very singular situation in which the local density of modes at the corners are enormously enhanced. We have considered several theoretical and numerical aspects of such structured films including a finite slabs of multi-scale checkerboards of NRIM satisfying the generalized lens theorem which are host of strongly enhanced electromagnetic feld. Such checkerboards can be mapped using transformational optics onto three-dimensional corner lenses consisting of semi-infinite heterogeneous anisotropic regions of space satisfying the generalized lens theorem. It is also possible to design three-dimensional checkerboards of complementary media...

## Redshift and Shear Calibration: Impact on Cosmic Shear Studies and Survey Design

Van Waerbeke, Ludovic; White, Martin; Hoekstra, Henk; Heymans, Catherine
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
25.71%
The cosmological interpretation of weak lensing by large-scale structures requires knowledge of the redshift distribution of the source galaxies. Current lensing surveys are often calibrated using external redshift samples which span a significantly smaller sky area in comparison to the lensing survey, and are thus subject to sample variance. Some future lensing surveys are expected to be calibrated in the same way, in particular the fainter galaxy populations where the entire color coverage, and hence photometric redshift estimate, could be challenging to obtain. Using N-body simulations, we study the impact of this sample variance on cosmic shear analysis and show that, to first approximation, it behaves like a shear calibration error 1+/-epsilon. Using the Hubble Deep Field as a redshift calibration survey could therefore be a problem for current lensing surveys. We discuss the impact of the redshift distribution sampling error and a shear calibration error on the design of future lensing surveys, and find that a lensing survey of area Theta square degrees and limiting magnitude m_lim}, has a minimum shear and redshift calibration accuracy requirements given by epsilon = epsilon_0 10^{beta(m_lim-24.5)} / sqrt(Theta/ 200). Above that limit...

## Absence of Red Structural Color in Photonic Glasses, Bird Feathers and Certain Beetles

Magkiriadou, Sofia; Park, Jin-Gyu; Kim, Young-Seok; Manoharan, Vinothan N.
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
25.77%
Colloidal glasses, bird feathers, and beetle scales can all show structural colors arising from short-ranged spatial correlations between scattering centers. Unlike the structural colors arising from Bragg diffraction in ordered materials like opals, the colors of these photonic glasses are independent of orientation, owing to their disordered, isotropic microstructures. However, there are few examples of photonic glasses with angle-independent red colors in nature, and colloidal glasses with particle sizes chosen to yield structural colors in the red show weak color saturation. Using scattering theory, we show that the absence of angle-independent red color can be explained by the tendency of individual particles to backscatter light more strongly in the blue. We discuss how the backscattering resonances of individual particles arise from cavity-like modes, and how they interact with the structural resonances to prevent red. Finally, we use the model to develop design rules for colloidal glasses with red, angle-independent structural colors.; Comment: 8 pages, 9 figures

## Performance and on-sky optical characterization of the SPTpol instrument

George, E. M.; Ade, P.; Aird, K. A.; Austermann, J. E.; Beall, J. A.; Becker, D.; Bender, A.; Benson, B. A.; Bleem, L. E.; Britton, J.; Carlstrom, J. E.; Chang, C. L.; Chiang, H. C.; Cho, H-M.; Crawford, T. M.; Crites, A. T.; Datesman, A.; de Haan, T.; Do
Tipo: Artigo de Revista Científica
Publicado em 17/10/2012 Português
Relevância na Pesquisa
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In January 2012, the 10m South Pole Telescope (SPT) was equipped with a polarization-sensitive camera, SPTpol, in order to measure the polarization anisotropy of the cosmic microwave background (CMB). Measurements of the polarization of the CMB at small angular scales (~several arcminutes) can detect the gravitational lensing of the CMB by large scale structure and constrain the sum of the neutrino masses. At large angular scales (~few degrees) CMB measurements can constrain the energy scale of Inflation. SPTpol is a two-color mm-wave camera that consists of 180 polarimeters at 90 GHz and 588 polarimeters at 150 GHz, with each polarimeter consisting of a dual transition edge sensor (TES) bolometers. The full complement of 150 GHz detectors consists of 7 arrays of 84 ortho-mode transducers (OMTs) that are stripline coupled to two TES detectors per OMT, developed by the TRUCE collaboration and fabricated at NIST. Each 90 GHz pixel consists of two antenna-coupled absorbers coupled to two TES detectors, developed with Argonne National Labs. The 1536 total detectors are read out with digital frequency-domain multiplexing (DfMUX). The SPTpol deployment represents the first on-sky tests of both of these detector technologies, and is one of the first deployed instruments using DfMUX readout technology. We present the details of the design...

## The SED Machine: A Spectrograph to Efficiently Classify Transient Events Discovered by PTF

Ngeow, Chow-Choong; Konidaris, Nick; Quimby, Robert; Ritter, Andreas; Rudy, Alexander R.; Lin, Edward; Ben-Ami, Sagi
Tipo: Artigo de Revista Científica
Publicado em 21/09/2012 Português
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The Palomar Transient Factory (PTF) is a project aimed to discover transients in the Universe, including Type Ia supernovae, core-collapse supernovae, and other exotic and rare transient events. PTF utilizes the Palomar 48-inch Telescope (P48) for discovering the transients, and follow-up mainly by the Palomar 60-inch Telescope (P60, for photometric light and color curves), as well as other telescopes. The discovery rate of PTF is about 7000 candidate transients per year, but currently only about 10% of the candidates are being followed-up and classified. To overcome this shortcoming, a dedicated spectrograph, called the SED Machine, is being designed and built at the California Institute of Technology for the P60 Telescope, aiming to maximize the classification efficiency of transients discovered by PTF. The SED Machine is a low resolution (R ~ 100) IFU spectrograph. It consists of a rainbow camera for spectrophotometric calibration, and a lenslet array plus 3-prism optics system for integrated field spectra. An overview of the science and design of the SED Machine is presented here.; Comment: 2 pages, 1 figure, proceeding submitted for IAU 290 Symposium -- Feeding compact objects: Accretion on all scales (Beijing 2012)

## Probing for Ultraheavy Quanta at LHC

Chanowitz, Michael S.
Tipo: Artigo de Revista Científica
Publicado em 28/03/1995 Português
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Experiments at the LHC are sensitive to the presence or absence of matter quanta at mass scales far beyond the scales they can probe directly. The production of $Z$ boson pairs by gluon-gluon fusion is greatly enhanced if there are ultraheavy quanta that carry $SU(3)_{\rm Color}$ and get their mass from electroweak symmetry breaking. For example, a fourth generation quark doublet with an arbitrarily heavy mass would induce a large excess in the $ZZ$ yield that could be detected at the LHC with only $\simeq 10\%$ of the design luminosity.; Comment: 12 pages plain LATEX plus 2 postscript figures in separate uuencoded file or by request. Complete manuscript available as a postscript file at http://theor1.lbl.gov/www/theorygroup/papers/36949.ps

## Design of novel architectures and field programmable gate arrays implementation of two dimensional gaussian surround function

Hanumantharaju, M. C.; Gopalakrishna, M. T.
Tipo: Artigo de Revista Científica
Publicado em 13/01/2014 Português
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A new design and novel architecture suitable for FPGA/ASIC implementation of a 2D Gaussian surround function for image processing application is presented in this paper. The proposed scheme results in enormous savings of memory normally required for 2D Gaussian function implementation. In the present work, the Gaussian symmetric characteristics which quickly falls off toward plus/minus infinity has been used in order to save the memory. The 2D Gaussian function implementation is presented for use in applications such as image enhancement, smoothing, edge detection and filtering etc. The FPGA implementation of the proposed 2D Gaussian function is capable of processing (blurring, smoothing, and convolution) high resolution color pictures of size up to $1600\times1200$ pixels at the real time video rate of 30 frames/sec. The Gaussian design exploited here has been used in the core part of retinex based color image enhancement. Therefore, the design presented produces Gaussian output with three different scales, namely, 16, 64 and 128. The design was coded in Verilog, a popular hardware design language used in industries, conforming to RTL coding guidelines and fits onto a single chip with a gate count utilization of 89,213 gates. Experimental results presented confirms that the proposed method offers a new approach for development of large sized Gaussian pyramid while reducing the on-chip memory utilization.; Comment: 10 Pages...

## zCOSMOS: A large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field

Lilly, S. J.; Capak, P.; Scoville, N.; Shopbell, P.; Thompson, D.
Fonte: American Astronomical Society Publicador: American Astronomical Society
Tipo: Article; PeerReviewed Formato: application/pdf
Publicado em /09/2007 Português
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zCOSMOS is a large-redshift survey that is being undertaken in the COSMOS field using 600 hr of observation with the VIMOS spectrograph on the 8 m VLT. The survey is designed to characterize the environments of COSMOS galaxies from the 100 kpc scales of galaxy groups up to the 100 Mpc scale of the cosmic web and to produce diagnostic information on galaxies and active galactic nuclei. The zCOSMOS survey consists of two parts: (1) zCOSMOSbright, a magnitude-limited I-band I_(AB) < 22.5 sample of about 20,000 galaxies with 0.1 < z < 1.2 covering the whole 1.7 deg^2 COSMOS ACS field, for which the survey parameters at z ~ 0.7 are designed to be directly comparable to those of the 2dFGRS at z ~ 0.1; and (2) zCOSMOS-deep, a survey of approximately 10,000 galaxies selected through color-selection criteria to have 1.4 < z < 3.0, within the central 1 deg^2. This paper describes the survey design and the construction of the target catalogs and briefly outlines the observational program and the data pipeline. In the first observing season, spectra of 1303 zCOSMOS-bright targets and 977 zCOSMOS-deep targets have been obtained. These are briefly analyzed to demonstrate the characteristics that may be expected from zCOSMOS, and particularly zCOSMOS-bright...

## Measurement, modeling and perception of painted surfaces : A Multi-scale analysis of the touch-up problem

Kalghatgi, Suparna
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
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Real-world surfaces typically have geometric features at a range of spatial scales. At the microscale, opaque surfaces are often characterized by bidirectional reflectance distribution functions (BRDF), which describes how a surface scatters incident light. At the mesoscale, surfaces often exhibit visible texture - stochastic or patterned arrangements of geometric features that provide visual information about surface properties such as roughness, smoothness, softness, etc. These textures also affect how light is scattered by the surface, but the effects are at a different spatial scale than those captured by the BRDF. Through this research, we investigate how microscale and mesoscale surface properties interact to contribute to overall surface appearance. This behavior is also the cause of the well-known "touch-up problem" in the paint industry, where two regions coated with exactly the same paint, look different in color, gloss and/or texture because of differences in application methods. At first, samples were created by applying latex paint to standard wallboard surfaces. Two application methods- spraying and rolling were used. The BRDF and texture properties of the samples were measured, which revealed differences at both the microscale and mesoscale. This data was then used as input for a physically-based image synthesis algorithm...

## Color in scientific visualization: Perception and image-based data display

Zhang, Hongqin
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Dissertação
Português
Relevância na Pesquisa
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Visualization is the transformation of information into a visual display that enhances users understanding and interpretation of the data. This thesis project has investigated the use of color and human vision modeling for visualization of image-based scientific data. Two preliminary psychophysical experiments were first conducted on uniform color patches to analyze the perception and understanding of different color attributes, which provided psychophysical evidence and guidance for the choice of color space/attributes for color encoding. Perceptual color scales were then designed for univariate and bivariate image data display and their effectiveness was evaluated through three psychophysical experiments. Some general guidelines were derived for effective color scales design. Extending to high-dimensional data, two visualization techniques were developed for hyperspectral imagery. The first approach takes advantage of the underlying relationships between PCA/ICA of hyperspectral images and the human opponent color model, and maps the first three PCs or ICs to several opponent color spaces including CIELAB, HSV, YCbCr, and YUV. The gray world assumption was adopted to automatically set the mapping origins. The rendered images are well color balanced and can offer a first look capability or initial classification for a wide variety of spectral scenes. The second approach combines a true color image and a PCA image based on a biologically inspired visual attention model that simulates the center-surround structure of visual receptive fields as the difference between fine and coarse scales. The model was extended to take into account human contrast sensitivity and include high-level information such as the second order statistical structure in the form of local variance map...

## REPRESENTAÇÃO E UTILIZAÇÃO DE MAPAS TURÍSTICOS EM COMPUTADORES DE MÃO

Pires, Mônica Inês dos Santos
Fonte: Universidade Federal do Paraná-UFPR Publicador: Universidade Federal do Paraná-UFPR
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 16/11/2004 Português
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