no code implementations • 19 Jul 2023 • Alexandre Benatti, Luciano da F. Costa
While the deep learning approach confirmed its potential for performing image segmentation, the alternative multiset methodology allowed for enhanced accuracy while requiring little computational resources.
no code implementations • 5 Oct 2022 • Giovana D. da Silva, Filipi N. Silva, Henrique F. de Arruda, Bárbara C. e Souza, Luciano da F. Costa, Diego R. Amancio
Such an outcome suggests that it is unfeasible to predict the success of books with high accuracy using only the full content of the texts.
no code implementations • 13 Jun 2022 • Alexandre Benatti, Henrique F. de Arruda, Luciano da F. Costa
Well-separated groups were obtained that provide a rich representation of the main similarity interrelationships between the 735 considered neuronal cells.
no code implementations • 10 May 2022 • Renan dos Reis, Luciano da F. Costa
In order to investigate the effect of the considered physicochemical features on the enzymes relationships, the coincidence-based method also is applied to create a meta-network, in which the enzymes similarity networks obtained by the combination of every possible feature becomes nodes of a feature combination network, and the coincidence similarity between those networks defines the respective links.
no code implementations • 17 Jan 2022 • Bárbara C. e Souza, Filipi N. Silva, Henrique F. de Arruda, Giovana D. da Silva, Luciano da F. Costa, Diego R. Amancio
In particular, texts are also characterized by a hierarchical structure that can be approached by using multi-scale concepts and methods.
no code implementations • 13 Nov 2021 • Luciano da F. Costa
Recent generalizations of multisets to real-valued functions, accounting for possibly negative values, have paved the way to a number of interesting implications and applications, including respective implementations as electronic systems.
no code implementations • 13 Nov 2021 • Luciano da F. Costa
After presenting the basic concepts related to real-valued multisets and the adopted similarity metrics, including the generalization of the real-valued Jaccard and coincidence indices to higher orders, we proceed to studying the response of a single neuron, not taking into account the output non-linearity (e. g.~sigmoid), respectively to the detection of gaussian two-dimensional stimulus in presence of displacement, magnification, intensity variation, noise and interference from additional patterns.
no code implementations • 8 Nov 2021 • Luciano da F. Costa
The multiset-based correlation methods, and especially the coincidence index, presented remarkable performance characterized by sharper and narrower peaks while secondary peaks were attenuated, which was maintained even in presence of intense levels of noise.
no code implementations • 2 Nov 2021 • Luciano da F. Costa
The objective quantification of similarity between two mathematical structures constitutes a recurrent issue in science and technology.
no code implementations • 18 Oct 2021 • Luciano da F. Costa
The present work addresses further generalizations of this index, including its modification into a coincidence index capable of accounting also for the level of relative interiority between the two compared entities, as well as respective extensions for sets in continuous vector spaces, the generalization to multiset addition, densities and generic scalar fields, as well as a means to quantify the joint interdependence between two random variables.
no code implementations • 5 Oct 2021 • Luciano da F. Costa
The situation in which the data needs to be represented in terms of respective probability densities is treated next, yielding the $M^{<\sigma>}$ meta model, which is then illustrated respectively to a real-world dataset (iris flowers data).
no code implementations • 18 Jul 2021 • Henrique F. de Arruda, Sandro M. Reia, Filipi N. Silva, Diego R. Amancio, Luciano da F. Costa
Interestingly, by using an approach based on complex networks to visualize the similarities between the different texts considered, we found that the patterns of poetry vary much more than prose.
no code implementations • 16 May 2020 • Eric K. Tokuda, Cesar H. Comin, Luciano da F. Costa
An important issue in clustering concerns the avoidance of false positives while searching for clusters.
no code implementations • 1 Jan 2020 • Luciano da F. Costa
After generalizing the concept of clusters to incorporate clusters that are linked to other clusters through some relatively narrow bridges, an approach for detecting patches of separation between these clusters is developed based on an agglomerative clustering, more specifically the single-linkage, applied to one-dimensional slices obtained from respective feature spaces.
no code implementations • 18 Oct 2019 • Caroline Ceribeli, Henrique F. de Arruda, Luciano da F. Costa
In order to better understand the organization of the citation network, we considered a multi-scale analysis, in which we used the information regarding sub-clusters.
1 code implementation • 22 Oct 2018 • Filipi N. Silva, Cesar H. Comin, Luciano da F. Costa
In this work, we suggest the concept of malleability of a network, which is defined as the exponential of the entropy of the probabilities of each possible unfolding with respect to a given configuration.
Physics and Society Social and Information Networks
no code implementations • 8 Aug 2018 • Thomas Peron, Francisco A. Rodrigues, Luciano da F. Costa
Since the landmarks established by the Cremonese school in the 16th century, the history of violin design has been marked by experimentation.
no code implementations • 22 Jun 2018 • Henrique F. de Arruda, Vanessa Q. Marinho, Luciano da F. Costa, Diego R. Amancio
With the increasing number of texts made available on the Internet, many applications have relied on text mining tools to tackle a diversity of problems.
no code implementations • 24 Aug 2017 • Henrique F. de Arruda, Vanessa Q. Marinho, Thales S. Lima, Diego R. Amancio, Luciano da F. Costa
Text network analysis has received increasing attention as a consequence of its wide range of applications.
no code implementations • 26 Dec 2016 • Mayra Z. Rodriguez, Cesar H. Comin, Dalcimar Casanova, Odemir M. Bruno, Diego R. Amancio, Francisco A. Rodrigues, Luciano da F. Costa
We also found that the default configuration of the adopted implementations was not accurate.
no code implementations • 30 Jun 2016 • Henrique F. de Arruda, Filipi N. Silva, Vanessa Q. Marinho, Diego R. Amancio, Luciano da F. Costa
In order to grasp the mesoscopic characteristics of semantical content in written texts, we devised a network model which is able to analyze documents in a multi-scale fashion.
no code implementations • 17 Jun 2016 • Cesar H. Comin, Thomas K. DM. Peron, Filipi N. Silva, Diego R. Amancio, Francisco A. Rodrigues, Luciano da F. Costa
More specifically, the identification of the main areas to which the concepts frequently used in complex networks can be applied paves the way to adopting and applying a larger set of concepts and methods deriving from those respective areas.
no code implementations • 4 Dec 2015 • Henrique F. de Arruda, Luciano da F. Costa, Diego R. Amancio
Many real systems have been modelled in terms of network concepts, and written texts are a particular example of information networks.
no code implementations • 28 Jul 2015 • Henrique F. de Arruda, Luciano da F. Costa, Diego R. Amancio
In the latter, many approaches have emphasized the semantical content of texts, as it is the case of bag-of-word language models.
no code implementations • 9 Apr 2015 • Diego R. Amancio, Filipi N. Silva, Luciano da F. Costa
A statistical analysis of the symmetry distribution performed in several novels showed that most of the words do not display symmetric patterns of connectivity.