Zobrazeno 1 - 10
of 280
pro vyhledávání: '"T. A. Melo"'
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 23, Iss 4 (2024)
Abstract This paper describes the development of a double-sided band-pass frequency selective surface based on Matryoshka geometry, preserving features such as miniaturization, multiband operation and stability of polarization and angle of incidence.
Externí odkaz:
https://doaj.org/article/d87ce1df3aa64ab1b98513b4bffd2a39
Autor:
Filho, F. J. S. Lima, Ferreira, V. M. B., Filho, P. C. F. da Silva, Gomes, F. O. da Silva, Alves, B. W. de Freitas, Barbosa, S. G. A., Santiago, T. de Melo, de Freitas, D. B.
Astrophysical data, in the domains of time, involve a wide range of stellar variability phenomena, among them the magnetic activity of the order of a few hours until the signature of an extra-solar planet which can cover a scale of time of a few days
Externí odkaz:
http://arxiv.org/abs/2209.04408
Autor:
C. Alves-Junior, T. F. Melo, L. F. A. Almada, K. E. S. Fontes, J. O. Vitoriano, R. S. Pessoa, N. A. Debacher
Publikováno v:
Materials Research, Vol 27 (2024)
In the present study, non-thermal plasma (NTP) of dielectric barrier discharge (DBD) was used to investigate the precipitation of salt from hypersaline waters obtained by evaporating seawater. A dripper was used to release drops of water over the NTP
Externí odkaz:
https://doaj.org/article/4c0216bb82a241e7b6c4e5aa92e5551a
Autor:
H. V. H. Silva Filho, R.G. M. dos Santos, Douglas C. P. Barbosa, M. T. de Melo, Lauro R. G. S. Lourenço Novo
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 22, Iss 3, Pp 379-395 (2023)
Abstract This paper presents an eyebolt structural fault detection system, based on the analysis of multiple electromagnetic parameters through a random forest classifier trained by both measurements and high-fidelity simulated signals. The proposed
Externí odkaz:
https://doaj.org/article/e9c2b61d07dc4449a70fc5331838371c
Autor:
L. P. Pontes, E. M. F. de Oliveira, C. P. N. Silva, A. G. Barboza, M. T. de Melo, Ignacio Llamas-Garro
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 21, Iss 4, Pp 598-604 (2022)
Abstract This paper presents the implementation of a 3-bit microstrip fractal-based phase shifter operating in the 430 MHz to 470 MHz frequency range. The fractal structure is used to confine different delay line lengths in the same area due to the s
Externí odkaz:
https://doaj.org/article/594ce12ed8eb4793850372e3d2b93498
Autor:
J. A. I. Araujo, M. R. T. Oliveira, P. H. B. Cavalcanti Filho, C. P. N. Silva, M. S. Coutinho, M. T. de Melo, Ignacio Llamas-Garro, A. G. Barboza
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 20, Iss 4, Pp 834-854 (2021)
Abstract This paper presents a compact and planar reconfigurable filtenna for application in Wireless systems. The filtenna is composed of a UWB circular antenna and a filter with two trapezoidal resonators. The filter is integrated on the antenna fe
Externí odkaz:
https://doaj.org/article/e2f9365e9e8d4402970bf3703b76ebdc
Autor:
DAMIC Collaboration, Aguilar-Arevalo, A., Amidei, D., Bertou, X., Boule, D., Butner, M., Cancelo, G., Vázquez, A. Castañeda, Chavarría, A. E., Neto, J. R. T. de Melo, Dixon, S., D'Olivo, J. C., Estrada, J., Moroni, G. Fernandez, Torres, K. P. Hernández, Izraelevitch, F., Kavner, A., Kilminster, B., Lawson, I., Liao, J., López, M., Molina, J., Moreno-Granados, G., Pena, J., Privitera, P., Sarkis, Y., Scarpine, V., Schwartz, T., Haro, M. Sofo, Tiffenberg, J., Machado, D. Torres, Trillaud, F., You, X., Zhou, J.
The DAMIC experiment uses fully depleted, high resistivity CCDs to search for dark matter particles. With an energy threshold $\sim$50 eV$_{ee}$, and excellent energy and spatial resolutions, the DAMIC CCDs are well-suited to identify and suppress ra
Externí odkaz:
http://arxiv.org/abs/1510.00044
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 19, Iss 3, Pp 396-406 (2020)
Abstract In this paper a 2-4 GHz microstrip IFM (Instantaneous Frequency Measurement) subsystem that uses Wilkinson power dividers, frequency discriminators based on band-stop filters and a DC arduino section is reported. The device uses band-stop fi
Externí odkaz:
https://doaj.org/article/e01aaa38376549eea149066642e889df
Autor:
Iago Hale, Xiao Ma, Arthur T. O. Melo, Francis Kwame Padi, Prasad S. Hendre, Sarah B. Kingan, Shawn T. Sullivan, Shiyu Chen, Jean-Marc Boffa, Alice Muchugi, Agyemang Danquah, Michael Teye Barnor, Ramni Jamnadass, Yves Van de Peer, Allen Van Deynze
Publikováno v:
Frontiers in Plant Science, Vol 12 (2021)
A defining component of agroforestry parklands across Sahelo-Sudanian Africa (SSA), the shea tree (Vitellaria paradoxa) is central to sustaining local livelihoods and the farming environments of rural communities. Despite its economic and cultural va
Externí odkaz:
https://doaj.org/article/53fece4eae7b40ec8f2288d78f2f5b8d
Publikováno v:
Scientific Electronic Archives, Vol 12, Iss 5, Pp 51-56 (2019)
Studies of fruit and seed biometrics are an important tool for the characterization of seed vigor and viability. In addition, it also contributes to the knowledge of the reproductive process, provides subsidy for seedling production and helps in unde
Externí odkaz:
https://doaj.org/article/56aa3c70a72c4bd18fce8a6e6cdbeeaa