Ricardo Emmanuel de Souza

Learn More
— Multispectral image analysis is a relatively promising field of research with applications in several areas, such as medical imaging and satellite monitoring. However, a considerable number of current methods of analysis are based on para-metric statistics. Alternatively, some methods in Computational Intelligence are inspired by biology and other(More)
Alzheimer's disease is the most common cause of dementia, yet hard to diagnose precisely without invasive techniques, particularly at the onset of the disease. This work approaches image analysis and classification of synthetic multispectral images composed by diffusion-weighted magnetic resonance (MR) cerebral images for the evaluation of cerebrospinal(More)
Automatic analysis of locomotion in studies of behavior and development is of great importance because it eliminates the subjective influence of evaluators on the study. This study aimed to develop and test the reproducibility of a system for automated analysis of locomotor activity in rats. For this study, 15 male Wistar were evaluated at P8, P14, P17,(More)
In order to perform a detailed study of the stellar kinematics in the vertical axis of bars, we obtained high signal–to–noise spectra along the major and minor axes of the bars in a sample of 14 face–on galaxies, and used them to determine the line of sight stellar velocity distribution, parameterized as Gauss–Hermite series. With these data, we developed a(More)
We have measured nuclear magnetic resonance (NMR) signals from several samples at room temperature in magnetic fields ranging from about 0.05 mT to 2 mT using a spectrometer based on a high-Tc dc SQUID (high transition temperature dc Superconducting QUantum Interference Device). We are able to observe proton signals from 1 mL of mineral oil in 2 mT in a(More)
— This paper presents the design and FPGA implementation of a WISHBONE Bus compatible arbitrary waveform generator (AWG) module. Developed for use in nuclear magnetic resonance (NMR) and other software-defined radio applications, the AWG core is capable of generating modulated signals as well as sine/cosine signals, using direct-digital synthesis (DDS).(More)