Jefferson O. Profile

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$40 USD / hodinu

petrópolis,

brazil

$40 USD / hodinu

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Připojil se ledna 10, 2017

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Jefferson O.

@osowsky

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(0 recenze)

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$40 USD / hodinu

petrópolis,

brazil

$40 USD / hodinu

Nedostupné

Úspěšně realizované projekty

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V rámci rozpočtu

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Včas

Nedostupné

Poměr opětovného zaměstnání

Electrical/Electronics Engineer

My professional experiences at private companies and/or federal universities include the following areas: - Underwater acoustic communication and acoustic signal processing. - Good skills in digital and analogical communication. - Digital image and discrete-time signal processing. - Filtering and estimation of signals and robust control of discrete-time one-dimensional systems. - Linear Kalman Filter applied to dinamics systems with uncertainties. - Linear Algebra and Matrix operations for solving linear and nonlinear problems. - Development of a new multilateration method (source/target localization) in Projective Space via algebraic geometry. - Development of Electronics Control Unit (ECU) applied to vehicle tracking systems. - Implementation of the communication protocols DNP3 and IEC 61850 as new features to the Copel Substation Automation System. Futhermore, my technical skills encompass the following areas of computing. - Advanced knowledges in several programming languages, including C/C++, Python, Matlab/Octave and Linux shell/bash. - Software design in Linux, QNX and Windows operating systems. - Development of real-time algorithms for embedded systems in single board computers. - Interprocess communication via BSD Socket (TCP and UDP). - Communication interfaces: RS-232, RS-485, SPI, USB, and so on.

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Zkušenosti

Instituto de Estudos do Mar Almirante Paulo Moreira/Marinha do Brasil

říj 2012 - čvn 2022 (9 roků, 8 měsíců)

Development of a software-defined underwater acoustic modem. C/C++ programming language. Windows OS

Vzdělání

Electrical and electronics engineering

Universidade Tecnológica Federal do Paraná,

Brazil

1990 - 1995

(5 roků)

Publikace

H∞ filtering for a class of 2-D discrete-time parameter-varying systems

7th International Workshop on Multidimensional

This paper deals with H∞ filtering for 2-D discrete-time LPV systems described by the FM second model with matrices that depend rationally on convex-bounded time-varying parameters. A method is proposed for the design of robust 2-D filters with a prescribed H∞ performance for all admissible parameters' trajectories. The filter design method builds on a DAR of the underlying system and is based on a parameter-dependent Lyapunov function with affine dependence on the system parameters.

Gain-scheduled control of two-dimensional discrete-time LPV systems in Roesser model

Automatica

This paper is concerned with gain-scheduled control of two-dimensional discrete-time linear parameter-varying systems described by a Roesser state-space model with matrices depending affinely on time-varying scheduling parameters. The parameter admissible values and variations are assumed to belong to given intervals. Linear matrix inequality based methods are devised for designing static state feedback gain-scheduled controllers with either an H∞H∞ or quadratic regulator-type performance.

Regional stability of two-dimensional nonlinear polynomial Fornasini-Marchesini systems

International Journal of Robust and Nonlinear Control

This paper addresses the problem of regional stability analysis of 2-dimensional nonlinear polynomial systems represented by the Fornasini-Marchesini second state-space model. A method based on a polynomial Lyapunov function is proposed to ensure local asymptotic stability and provide an estimate of the domain of attraction of the system zero equilibrium point.

The First Version of an Underwater Acoustic Software-Defined Modem for the Brazilian Navy

CSub - Underwater Acoustic Modem

This work presents the progress that has been achieved by the Department of Underwater Acoustics at the Almirante Paulo Moreira Sea Studies Institute in the development of a simplex underwater acoustic software-defined modem. This paper describes how the modem’s applications were implemented using C programming language, as well as its technical and functional features to date. Three scenarios for testing are introduced to assess the modem’s performances.

How to Find if a Single-Board Computer Loses Audio Samples in an Isochronous Data Transfer via USB

2018 IEEE XXV International Conference on Electronics, Electrical Engineering and Computing

This work deals with the issue of loss of samples in a data acquisition process using an audio capturer device connected to a low cost and consumption single-board computer via USB interface. A question that may arise in this kind of hardware is if it can acquire data from the device avoiding an overrunning buffer. A method for finding lost samples is presented that is based on the acquisition of a linear frequency modulation signal and the analisys of its discrete Fourier Transform.

Comm and Biological Monitoring Experiment in an Upwelling Environment at Cabo Frio Island Bay

OCEANS 2019

This work presents the results of an experiment aiming at acoustically characterizing, in a long term, the biological activity and its correlation with the upwelling regime in Cabo Frio Island Bay, and other biotic and abiotic factors. Moreover, to develop a signaling scheme using local bioacoustics characteristics for covert communications and to understand the impact of noise and ocean stratification on broadband communications.

Particle motion measurements near a rocky shore off Cabo Frio Island

The Journal of the Acoustical Society of America

This paper describes the lessons learned from the experiment BIOCOM'19 carried out in January 2019, in a shallow water bay off the island of Cabo Frio (RJ, Brazil). A dual accelerometer vector sensor hydrophone was deployed for two days, near a rocky shore covered with a significant benthic fauna.