Zobrazeno 1 - 10
of 363
pro vyhledávání: '"Helder R"'
Autor:
Renato E. N. de Moraes, Yngrith S. Silva, Felipe N. Martins, Jair A. L. Silva, Helder R. O. Rocha
Publikováno v:
IEEE Access, Vol 12, Pp 120198-120218 (2024)
Energy conservation is crucial in wireless ad hoc sensor network design to increase network lifetime. Since communication consumes a major part of the energy used by a sensor node, efficient communication is important. Topology control aims at achiev
Externí odkaz:
https://doaj.org/article/4e164a923a4c4bd1a9ff1d81db52a243
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 23, Iss 1 (2024)
Abstract This paper presents a numerical study and the optimization of very short discrete multi-pump Raman amplifiers using Tellurite-based optical fibers. While most studies about discrete Raman amplifiers usually focus on cases where hundreds of m
Externí odkaz:
https://doaj.org/article/1c41a86c2f0940968805e540371760e8
Autor:
Higor Camporez, Yasmin M. de Freitas, Jair A. L. Silva, Leandro L. Costalonga, Helder R. O. Rocha
Publikováno v:
Revista Vortex, Vol 11, Iss 1, Pp 1-25 (2023)
Assistive technology, especially gaze-controlled, can promote accessibility, health care, well-being and inclusion for impaired people, including musical activities that can be supported by interfaces controlled using eye tracking. Also, the Internet
Externí odkaz:
https://doaj.org/article/884805e51db84dbc95a2d61993d7068d
Autor:
Helder R. O. Rocha, Rodrigo Fiorotti, Jussara F. Fardin, Hilel Garcia-Pereira, Yann E. Bouvier, Alba Rodríguez-Lorente, Imene Yahyaoui
Publikováno v:
Sensors, Vol 24, Iss 1, p 85 (2023)
The efficient use of the photovoltaic power requires a good estimation of the PV generation. That is why the use of good techniques for forecast is necessary. In this research paper, Long Short-Term Memory, Bidirectional Long Short-Term Memory and th
Externí odkaz:
https://doaj.org/article/1b034f2755424237a67a182f02df29ec
Autor:
Klaas Minne Van Der Zwaag, Marianne Pontara Marinho, Wesley Da Silva Costa, Francisco De Assis Souza Dos Santos, Teodiano Freire Bastos-Filho, Helder R. O. Rocha, Marcelo E. V. Segatto, Jair A. L. Silva
Publikováno v:
IEEE Access, Vol 9, Pp 104217-104226 (2021)
Visible Light Communication (VLC) is an interesting solution in Intensive Care (IC) medical environments to, among others, prevent the spread of emerging diseases. This work presents the design of a low-cost and stable VLC transceiver system in addit
Externí odkaz:
https://doaj.org/article/a8be143bca764ef89d321fe5876ab392
Autor:
Arnaldo G. Leal-Junior, Helder R. O. Rocha, Antreas Theodosiou, Anselmo Frizera, Carlos Marques, Kyriacos Kalli, Moises R. N. Ribeiro
Publikováno v:
IEEE Access, Vol 8, Pp 31983-31991 (2020)
We report the development of an optimization approach for diaphragm-embedded optical fiber sensors, which was applied on the pressure, force and liquid level assessment using chirped fiber Bragg gratings (CFBGs) inscribed in cyclic transparent optica
Externí odkaz:
https://doaj.org/article/19ea1407d97b49f7aaf93c8db291c631
Autor:
Filipe Prudente da Silva, Kedson Alessandri Lobo Neves, Francisco R. A. Correa, Lílian K. X. Silva, Helder R. Batista, Welligton C. da Silva, Nohora Mercado Caruso, Antonio Humberto Hamad Minervino
Publikováno v:
Veterinary Sciences, Vol 9, Iss 8, p 377 (2022)
This study aimed to evaluate follicular dynamics and pregnancy rates in Nellore heifers submitted to fixed-time artificial insemination (FTAI) protocols associated with equine chorionic gonadotrophin (eCG) or follicle stimulating hormone (FSH). Nello
Externí odkaz:
https://doaj.org/article/59fca9ab170c46de84e7ef047fe36fe2
Autor:
Mariana L. Silveira, Helder R. O. Rocha, Paulo F. C. Antunes, Paulo S. B. André, Marcelo E. V. Segatto, Anselmo Frizera, Camilo A. R. Díaz
Publikováno v:
Sensors, Vol 21, Iss 17, p 5828 (2021)
Optical fiber sensors based on fiber Bragg gratings (FBGs) are prone to measurement errors if the cross-sensitivity between temperature and strain is not properly considered. This paper describes a self-compensated technique for canceling the undesir
Externí odkaz:
https://doaj.org/article/49fac8193fe0498d8b9c08dc18797734
Autor:
André M. L. Miranda, Fabio de O. Lima, Helder R. de O. Rocha, Nadamudi Vijaykumar, Carlos R. L. Francês, Marcelo E. V. Segatto, João C. W. A. Costa
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 13, Iss 1, Pp 1-15 (2014)
In this paper, we propose a hybrid methodology based on Graph-Coloring and Genetic Algorithm (GA) to solve the Wavelength Assignment (WA) problem in optical networks, impaired by physical layer effects. Our proposal was developed for a static scenari
Externí odkaz:
https://doaj.org/article/ec24ea1fb3e04fdb9a77b3abc2907def
Autor:
Oliveira Filho, Helder R., Santos, Érick A., Monteiro, Robson S., Zanin, Hudson, Teófilo, Reinaldo F.
Publikováno v:
In Electrochimica Acta 10 December 2024 507