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694 results on '"Andrade, António"'

1. New Three and Four-Dimensional Toric and Burst-Error-Correcting Quantum Codes

Author

Trinca, Cibele Cristina, Palazzo Jr., Reginaldo, Watanabe, Ricardo Augusto, de Albuquerque, Clarice Dias, Interlando, José Carmelo, and de Andrade, Antônio Aparecido

Subjects
Computer Science - Information Theory, Quantum Physics
Abstract

Ongoing research and experiments have enabled quantum memory to realize the storage of qubits. On the other hand, interleaving techniques are used to deal with burst of errors. Effective interleaving techniques for combating burst of errors by using classical error-correcting codes have been proposed in several articles found in the literature, however, to the best of our knowledge, little is known regarding interleaving techniques for combating clusters of errors in topological quantum error-correcting codes. Motivated by that, in this work, we present new three and four-dimensional toric quantum codes which are featured by lattice codes and apply a quantum interleaving method to such new three and four-dimensional toric quantum codes. By applying such a method to these new codes we provide new three and four-dimensional quantum burst-error-correcting codes. As a consequence, new three and four-dimensional toric and burst-error-correcting quantum codes are obtained which have better information rates than those three and four-dimensional toric quantum codes from the literature. In addition to these proposed three and four-dimensional quantum burst-error-correcting codes improve such information rates, they can be used for burst-error-correction in errors which are located, quantum data stored and quantum channels with memory., Comment: 16 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:2205.13582

Published
2023

2. Past Practices, Current Debates and Disputes: Future Engagements and Opportunities Regarding Digital Transformation for Sustainable Development : Working Group 9.4: Implications of Information and Digital Technologies for Development

Author

Davison, Robert M., Díaz Andrade, Antonio, Bailey, Arlene, Ruhode, Ephias, Walsham, Geoff, van Belle, Jean-Paul, van Biljon, Judy, Wakunuma, Kutoma, Park, Kyung Ryul, Joia, Luiz A., Thomas, Manoj, Frasheri, Neki, Wall, P. J., La Rovere, Renata Lèbre, Masiero, Silvia, Karanasios, Stan, Rannenberg, Kai, Editor-in-Chief, Soares Barbosa, Luís, Editorial Board Member, Carette, Jacques, Editorial Board Member, Tatnall, Arthur, Editorial Board Member, Neuhold, Erich J., Editorial Board Member, Stiller, Burkhard, Editorial Board Member, Stettner, Lukasz, Editorial Board Member, Pries-Heje, Jan, Editorial Board Member, Kreps, David, Editorial Board Member, Rettberg, Achim, Editorial Board Member, Furnell, Steven, Editorial Board Member, Mercier-Laurent, Eunika, Editorial Board Member, Winckler, Marco, Editorial Board Member, Malaka, Rainer, Editorial Board Member, and Leslie, Christopher, editor

Published
2024
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3. Predictive Maintenance and Operations in Railway Systems

Author

Andrade, Antonio R., Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Kumar, Uday, editor, Karim, Ramin, editor, Galar, Diego, editor, and Kour, Ravdeep, editor

Published
2024
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4. On the Construction of New Toric Quantum Codes and Quantum Burst-Error Correcting Codes

Author

Trinca, Cibele Cristina, Interlando, J. Carmelo, Palazzo Jr., Reginaldo, de Andrade, Antonio Aparecido, and Watanabe, Ricardo Augusto

Subjects
Computer Science - Information Theory, Mathematics - Combinatorics
Abstract

A toric quantum error-correcting code construction procedure is presented in this work. A new class of an infinite family of toric quantum codes is provided by constructing a classical cyclic code on the square lattice $\mathbb{Z}_{q}\times \mathbb{Z}_{q}$ for all odd integers $q\geq 5$ and, consequently, new toric quantum codes are constructed on such square lattices regardless of whether $q$ can be represented as a sum of two squares. Furthermore this work supplies for each $q$ the polyomino shapes that tessellate the corresponding square lattices and, consequently, tile the lattice $\mathbb{Z}^{2}$. The channel without memory to be considered for these constructed toric quantum codes is symmetric, since the $\mathbb{Z}^{2}$-lattice is autodual. Moreover, we propose a quantum interleaving technique by using the constructed toric quantum codes which shows that the code rate and the coding gain of the interleaved toric quantum codes are better than the code rate and the coding gain of Kitaev's toric quantum codes for $q=2n+1$, where $n\geq 2$, and of an infinite class of Bombin and Martin-Delgado's toric quantum codes. In addition to the proposed quantum interleaving technique improves such parameters, it can be used for burst-error correction in errors which are located, quantum data stored and quantum channels with memory., Comment: Submitted to "Journal of Algebra, Combinatorics, Discrete Structures and Applications"

Published
2022

14. Well-Rounded Lattices via Polynomials

Author

Alves, Carina, Pinto, William Lima da Silva, and de Andrade, Antonio Aparecido

Subjects
Computer Science - Information Theory, 15A03, 15A06, 15A15, 11C08, 11C20, 11H31
Abstract

Well-rounded lattices have been a topic of recent studies with applications in wiretap channels and in cryptography. A lattice of full rank in Euclidean space is called well-rounded if its set of minimal vectors spans the whole space. In this paper, we investigate when lattices coming from polynomials with integer coefficients are well-rounded.

Published
2019

15. Copper incorporation by low-energy ion implantation in PEO-coated additively manufactured Ti6Al4V ELI: Surface microstructure, cytotoxicity and antibacterial behavior

Author

Baldin, Estela Kerstner, de Castro, Victor Velho, Santos, Pedro Bell, Aguzzoli, Cesar, Bernardi, Fabiano, Medeiros, Thallyson, Maurmann, Natasha, Pranke, Patricia, Frassini, Rafaele, Roesh, Mariana Ely, Longhitano, Guilherme Arthur, Munhoz, André Luiz Jardini, de Andrade, Antonio Marcos Helgueira, and de Fraga Malfatti, Célia

Published
2023
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16. The System Robustness SOLL in Student Learning Process

Author

Magalhães, Andreia, Alves, José Matias, Andrade, António, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Rocha, Alvaro, editor, Adeli, Hojjat, editor, Dzemyda, Gintautas, editor, and Moreira, Fernando, editor

Published
2022
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17. An ILP Approach for the Maintenance Crew Scheduling Problem Considering Skillsets

Author

Alves, Tiago, Andrade, António R., Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, di Mare, Francesca, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Karim, Ramin, editor, Ahmadi, Alireza, editor, Soleimanmeigouni, Iman, editor, Kour, Ravdeep, editor, and Rao, Raj, editor

Published
2022
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18. Statistical Representation of Railway Track Irregularities Using Wavelets

Author

A. Costa, Mariana, R. Andrade, António, N. Costa, João, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, di Mare, Francesca, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Karim, Ramin, editor, Ahmadi, Alireza, editor, Soleimanmeigouni, Iman, editor, Kour, Ravdeep, editor, and Rao, Raj, editor

Published
2022
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23. Criteria for the Operating Room Confirmation of the Diagnosis of Hip Instability: The Results of an International Expert Consensus Conference

Author

Safran, Marc R., Murray, Iain R., Andrade, Antonio J., Aoki, Stephen K., Ayeni, Olufemi R., Balakumar, Jitendra, Bonin, Nicolas, Brick, Matthew J., Cakic, Josip N., Domb, Benjamin G., Field, Richard E., Laude, Frederic, Mei-Dan, Omer, Nho, Shane J., O’Donnell, John M., Philippon, Marc J., and Khanduja, Vikas

Published
2022
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27. SOLL Platform and the Adoption of Innovation by Teachers

Author

Magalhães, Andreia, Alves, José Matias, Andrade, António, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Rocha, Álvaro, editor, Adeli, Hojjat, editor, Dzemyda, Gintautas, editor, Moreira, Fernando, editor, and Ramalho Correia, Ana Maria, editor

Published
2021
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28. SOLL Platform and Its Perceived Usefulness and Ease

Author

Magalhães, Andreia, Andrade, António, Alves, José Matias, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Rocha, Álvaro, editor, Ferrás, Carlos, editor, López-López, Paulo Carlos, editor, and Guarda, Teresa, editor

Published
2021
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40. Digital Technology for Preserving Cultural Heritage in Tonga

Author

Mesui, ‘Anau, Andrade, Antonio Diaz, Waizenegger, Lena, Rannenberg, Kai, Editor-in-Chief, Sakarovitch, Jacques, Editorial Board Member, Goedicke, Michael, Editorial Board Member, Tatnall, Arthur, Editorial Board Member, Neuhold, Erich J., Editorial Board Member, Pras, Aiko, Editorial Board Member, Tröltzsch, Fredi, Editorial Board Member, Pries-Heje, Jan, Editorial Board Member, Kreps, David, Editorial Board Member, Reis, Ricardo, Editorial Board Member, Furnell, Steven, Editorial Board Member, Furbach, Ulrich, Editorial Board Member, Winckler, Marco, Editorial Board Member, Malaka, Rainer, Editorial Board Member, Nielsen, Petter, editor, and Kimaro, Honest Christopher, editor

Published
2019
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46. Fibrations structure and degree formulae for Milnor fibers

Author

Dutertre, Nicolas, Santos, Raimundo N. Araújo Dos, Chen, Ying, and Andrade, Antonio

Subjects
Mathematics - Algebraic Geometry, Mathematics - Geometric Topology
Abstract

In this survey, we remind some fibrations structure theorems (also called Milnor's fibrations) recently proved in the real and complex case, in the local and global settings. We give several Poincar\'e-Hopf type formulae which relates the Euler-Poincar\'e characteristic of these fibers (also called Milnor's fibers) and indices (topological degree) of appropriated vector fields defined on spheres of radii small or big enough.

Published
2014

47. Open book structures on semi-algebraic manifolds

Author

Dutertre, Nicolas, Santos, Raimundo N. Araújo Dos, Chen, Ying, and Andrade, Antonio

Subjects
Mathematics - Algebraic Geometry, Mathematics - General Topology
Abstract

Given a $C^2$ semi-algebraic mapping $F: \mathbb{R}^N \rightarrow \mathbb{R}^p,$ we consider its restriction to $W\hookrightarrow \mathbb{R^{N}}$ an embedded closed semi-algebraic manifold of dimension $n-1\geq p\geq 2$ and introduce sufficient conditions for the existence of a fibration structure (generalized open book structure) induced by the projection $\frac{F}{\Vert F \Vert}:W\setminus F^{-1}(0)\to S^{p-1}$. Moreover, we show that the well known local and global Milnor fibrations, in the real and complex settings, follow as a byproduct by considering $W$ as spheres of small and big radii, respectively. Furthermore, we consider the composition mapping of $F$ with the canonical projection $\pi: \mathbb{R}^{p} \to \mathbb{R}^{p-1}$ and prove that the fibers of $\frac{F}{\Vert F \Vert}$ and $\frac{\pi\circ F}{\Vert \pi\circ F \Vert}$ are homotopy equivalent. We also show several formulae relating the Euler characteristics of the fiber of the projection $\frac{F}{\Vert F \Vert}$ and $W\cap F^{-1}(0).$ Similar formulae are proved for mappings obtained after composition of $F$ with canonical projections.

Published
2014

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