Zobrazeno 1 - 10
of 2 983
pro vyhledávání: '"Ravagnani, A."'
This paper studies two crucial problems in the context of coded distributed storage systems directly related to their performance: 1) for a fixed alphabet size, determine the minimum number of servers the system must have for its service rate region
Externí odkaz:
http://arxiv.org/abs/2407.01229
Autor:
Jany, Benjamin, Ravagnani, Alberto
We investigate the maximum cardinality and the mathematical structure of error-correcting codes endowed with the Kendall-$\tau$ metric. We establish an averaging bound for the cardinality of a code with prescribed minimum distance, discuss its sharpn
Externí odkaz:
http://arxiv.org/abs/2405.14228
In this note we apply a spectral method to the graph of alternating bilinear forms. In this way, we obtain upper bounds on the size of an alternating rank-metric code for given values of the minimum rank distance. We computationally compare our resul
Externí odkaz:
http://arxiv.org/abs/2405.09254
Autor:
Ravagnani, Adele, Lillo, Fabrizio, Deriu, Paola, Mazzarisi, Piero, Medda, Francesca, Russo, Antonio
Identification of market abuse is an extremely complicated activity that requires the analysis of large and complex datasets. We propose an unsupervised machine learning method for contextual anomaly detection, which allows to support market surveill
Externí odkaz:
http://arxiv.org/abs/2403.00707
Independent parallel q-ary symmetric channels are a suitable transmission model for several applications. The proposed weighted-Hamming metric is tailored to this setting and enables optimal decoding performance. We show that some weighted-Hamming-me
Externí odkaz:
http://arxiv.org/abs/2401.17801
We investigate the fundamental limits of the recently proposed random access coverage depth problem for DNA data storage. Under this paradigm, it is assumed that the user information consists of $k$ information strands, which are encoded into $n$ str
Externí odkaz:
http://arxiv.org/abs/2401.15722
Autor:
Adilson Domingos dos Reis Filho, Waléria Christiane Rezende Fett, Fabrício Azevedo Voltarelli, Jarbas Ferrari Junior, Fabrício Cesar de Paula Ravagnani, Christianne de Faria Coelho-Ravagnani, Carlos Alexandre Fett
Publikováno v:
Geriatrics, Gerontology and Aging, Vol 5, Pp 182-188 (2024)
Objetivo: Identificar a prevalência de somatótipos e analisar a associação com o perfil lipídico e glicêmico em idosas. Métodos: O estudo contou com 102 idosas de três centros de convivência do município de Cuiabá/MT, com idade entre 60 e
Externí odkaz:
https://doaj.org/article/2b000b8c01bf44bc8e31224f6fa8a660
We present the theory of linear rank-metric codes from the point of view of their fundamental parameters. These are: the minimum rank distance, the rank distribution, the maximum rank, the covering radius, and the field size. The focus of this chapte
Externí odkaz:
http://arxiv.org/abs/2312.06282
We propose and develop a theory of Ferrers diagrams and their $q$-rook polynomials solely based on their diagonals. We show that the cardinalities of the diagonals of a Ferrers diagram are equivalent information to their rook numbers, $q$-rook polyno
Externí odkaz:
http://arxiv.org/abs/2312.02508
Publikováno v:
Designs, Codes and Cryptography (2024)
We investigate CSS and CSS-T quantum error-correcting codes from the point of view of their existence, rarity, and performance. We give a lower bound on the number of pairs of linear codes that give rise to a CSS code with good correction capability,
Externí odkaz:
http://arxiv.org/abs/2310.16504