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Effects of Large Pressure Amplitude Low Frequency Noise in the Parotid Gland Pe...
Introduction: In tissues and organs exposed to large pressure amplitude low frequency noise fibrosis occurs in the absence of inflammatory signs, which is thought to be a protective response. In the parotid gland the perivasculo-ductal connective tissue surrounds arteries, veins and the ductal tree. Perivasculo-ductal connective tissue is believed to function as a mechanical stabilizer of the glandular tissue.M...
Behavior modeling in social networks
Brito, José Francisco Mendes deAs redes sociais têm tido um crescimento viral nos últimos anos. No início do século XXI já se discutia a indispensabilidade da Internet e no presente, as redes sociais reforçam ainda mais esta ideia. O ser humano, ao longo da sua história, foi mostrando a necessidade de exprimir as suas ideias, os seus pensamentos, as suas alegrias, as suas tristezas… As redes sociais são assim um espaço onde as pessoas, de di...
Radial Distortion Self-Calibration
Brito, José Henrique; Angst, Roland; Köser, Kevin; Pollefeys, MarcIn cameras with radial distortion, straight lines in space are in general mapped to curves in the image. Although epipolar geometry also gets distorted, there is a set of special epipolar lines that remain straight, namely those that go through the distortion center. By finding these straight epipolar lines in camera pairs we can obtain constraints on the distortion center(s) without any calibration object or p...
Unknown Radial Distortion Centers in Multiple View Geometry Problems
Brito, José Henrique; Angst, Roland; Köser, Kevin; Zach, Christopher; Branco, Pedro; Ferreira, Manuel João; Pollefeys, MarcThe radial undistortion model proposed by Fitzgibbon and the radial fundamental matrix were early steps to extend classical epipolar geometry to distorted cameras. Later minimal solvers have been proposed to find relative pose and radial distortion, given point correspondences between images. However, a big drawback of all these approaches is that they require the distortion center to be exactly known. In this ...
Effects of low-frequency noise on cardiac collagen and cardiomyocyte ultrastruc...
Antunes, Eduardo; Borrecho, Gonçalo; Oliveira, Pedro; Matos, António P. Alves de; Brito, José; Águas, Artur; Martins dos Santos, José"Introduction: Low-frequency noise (LFN) leads to the development of tissue fibrosis. We previously reported the development of myocardial and perivascular fibrosis and a reduction of cardiac connexin43 in rats, but data is lacking concerning the affected type of collagen as well as the ultrastructural myocardial modifications. Objectives: The aim of this study was to quantify cardiac collagens I and III and to...
Immunohistochemical evaluation of cardiac connexin43 in rats exposed to low-fre...
Antunes, Eduardo; Borrecho, Gonçalo; Oliveira, Pedro; Brito, José; Águas, Artur; Martins dos Santos, José"Introduction: Low-frequency noise (LFN) leads to an abnormal proliferation of collagen and development of tissue fibrosis. It has been shown that myocardial fibrosis in association with gap junction remodeling occurs in several cardiac diseases and can be implicated in the development of ventricular tachyarrhythmias. We previously reported a strong development of myocardial fibrosis induced by LFN in rats but ...
Effects of large pressure amplitude low frequency noise in the parotid gland pe...
Oliveira, Pedro; Brito, José; Mendes, João; Fonseca, Jorge da; Águas, Artur; Martins dos Santos, José"Introduction: In tissues and organs exposed to large pressure amplitude low frequency noise fibrosis occurs in the absence of inflammatory signs, which is thought to be a protective response. In the parotid gland the perivasculo-ductal connective tissue surrounds arteries, veins and the ductal tree. Perivasculo-ductal connective tissue is believed to function as a mechanical stabilizer of the glandular tissue....
The feasibility of wavelength dispersive X-ray fluorescence spectrometry for th...
Brito, José A. A. de; Cavaleiro, Inês I. B.; Fernandes, Tânia A. P.; Gonçalves, Luísa M. L."This work demonstrates the feasibility of wavelength dispersive X-ray fluorescence for the assessment of lead in animal bone powder."
One-sided Radial-Fundamental Matrix Estimation
Brito, José Henrique; Zach, Christopher; Köser, Kevin; Ferreira, Manuel; Pollefeys, MarcFor modern consumer cameras often approximate calibration data is available, making applications such as 3D reconstruction or photo registration easier as compared to the pure uncalibrated setting. In this paper we address the setting with calibrateduncalibrated image pairs: for one image intrinsic parameters are assumed to be known, whereas the second view has unknown distortion and calibration parameters. Thi...
Statistical and mathematical concepts and principles applicable to uncertainty ...
Brito, José A. A. de"This work discusses the statistical and mathematical concepts and principles applicable to in vivo 109Cd K X Ray Fluorescence measurements (109Cd KXRF) of lead in human bone. The primary aim of this paper is to examine divergent views about the quantitative methods applied to estimate in vivo bone lead concentrations and their uncertainty when using the 109Cd KXRF technique. The emphasis is on the potential ef...
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