Luciano da Fontoura Costa

ORCID: 0000-0001-5203-4366
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About
Contact & Profiles
Research Areas
  • Complex Network Analysis Techniques
  • Opinion Dynamics and Social Influence
  • Neural Networks and Applications
  • Bioinformatics and Genomic Networks
  • Neural dynamics and brain function
  • Cell Image Analysis Techniques
  • Medical Image Segmentation Techniques
  • Gene Regulatory Network Analysis
  • Complex Systems and Time Series Analysis
  • Image Retrieval and Classification Techniques
  • Topological and Geometric Data Analysis
  • Data Visualization and Analytics
  • Advanced Text Analysis Techniques
  • Image and Object Detection Techniques
  • Visual perception and processing mechanisms
  • Functional Brain Connectivity Studies
  • Advanced Clustering Algorithms Research
  • Genetics, Bioinformatics, and Biomedical Research
  • Plant and animal studies
  • Urban Design and Spatial Analysis
  • Music and Audio Processing
  • Digital Imaging for Blood Diseases
  • Nonlinear Dynamics and Pattern Formation
  • Graph theory and applications
  • Advanced Vision and Imaging

Universidade de São Paulo
2015-2024

Universidade Federal de São Carlos
2013-2023

Universidad San Pedro
1993-2023

Czech Academy of Sciences, Institute of Physics
2016-2022

Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
2022

Institute of Physics
2022

Universidade Brasil
2019-2021

University of Rio Grande and Rio Grande Community College
2020

Universidade Federal do Rio Grande do Sul
2020

Indiana University Bloomington
2018

Abstract Each complex network (or class of networks) presents specific topological features which characterize its connectivity and highly influence the dynamics processes executed on network. The analysis, discrimination, synthesis networks therefore rely use measurements capable expressing most relevant features. This article a survey such measurements. It includes general considerations about characterization, brief review principal models, presentation main existing Important related...

10.1080/00018730601170527 article EN Advances In Physics 2007-01-01

The success of new scientific areas can be assessed by their potential in contributing to theoretical approaches and applications real-world problems. Complex networks have fared extremely well both these aspects, with sound basis being developed over the years a variety applications. In this survey, we analyze complex problems data, emphasis representation, analysis modeling. A diversity phenomena are surveyed, which may classified into no less than 11 areas, providing clear indication...

10.1080/00018732.2011.572452 article EN Advances In Physics 2011-05-14

Pattern recognition has been employed in a myriad of industrial, commercial and academic applications. Many techniques have devised to tackle such diversity Despite the long tradition pattern research, there is no technique that yields best classification all scenarios. Therefore, as many possible should be considered high accuracy Typical related works either focus on performance given algorithm or compare various methods. In occasions, however, researchers who are not experts field machine...

10.1371/journal.pone.0094137 article EN cc-by PLoS ONE 2014-04-24

Many putative genetic factors that confer risk to neurodevelopmental disorders such as autism spectrum (ASDs) and X-linked intellectual disability (XLID), neuropsychiatric including attention deficit hyperactivity disorder (ADHD) schizophrenia (SZ) have been identified in individuals from diverse human populations. Although there is significant aetiological heterogeneity within between these conditions, recent data show contribute their comorbidity. studies candidate gene associations for...

10.1038/mp.2013.16 article EN cc-by-nc-nd Molecular Psychiatry 2013-02-26

Bud, This Mitochondrion's for You How is organelle size adjusted to be appropriate cell size? Rafelski et al. (p. 822 ) used a quantitative method measuring mitochondria in living budding yeast cells and found that rather than using the apparently simplest mechanism of dividing organelles equally among mother daughter cells, mitochondrial level bud, independent mother's own content, size, or age.

10.1126/science.1225720 article EN Science 2012-11-08

When dealing with the dissemination of epidemics, one important question that can be asked is location where contamination began. In this paper, we analyze three spreading schemes and propose validate an effective methodology for identification source nodes. The method based on calculation centrality nodes sampled network, expressed here by degree, betweenness, closeness eigenvector centrality. We show node tends to have highest measurement values. potential illustrated respect theoretical...

10.1103/physreve.84.056105 article EN Physical Review E 2011-11-15

The “rich-club phenomenon” in complex networks is characterized when nodes of higher degree are more interconnected than with lower degree. presence this phenomenon may indicate several interesting high-level network properties, such as tolerance to hub failures. Here, the authors investigate existence across hierarchies real-world networks. Their simulations reveal that or absence a does not imply its network’s successive hierarchies, and behavior even nonmonotonic some cases.

10.1063/1.2773951 article EN Applied Physics Letters 2007-08-20

The identification of the most influential spreaders in networks is important to control and understand spreading capabilities system as well ensure an efficient information diffusion such rumorlike dynamics. Recent works have suggested that not independent dynamics being studied. For instance, key disease might necessarily be so when it comes analyzing social contagion or rumor propagation. Additionally, has been shown different metrics (degree, coreness, etc.) identify nodes even for same...

10.1103/physreve.90.032812 article EN Physical Review E 2014-09-22

A central issue in ecology is the definition and identification of keystone species, i.e. species that are relatively more important than others for maintaining community structure ecosystem functioning. Network theory has been pointed out as a robust theoretical framework to enhance operationality concept. We used concept centrality proxy species’ relative importance seed dispersal networks composed either frugivorous bats or birds their food‐plants. Centrality was expected be determined...

10.1111/oik.01613 article EN Oikos 2014-12-11

Cells are able to detect and respond mechanical cues from their environment. Previous studies have investigated this mechanosensitivity on various cell types, including neural cells such as astrocytes. In study, we carefully optimized polyacrylamide gels, commonly used compliant growth substrates, considering homogeneity in surface topography, properties, coating density, identified several potential pitfalls for the purpose of studies. The resulting astrocyte response substrates with shear...

10.1088/0953-8984/22/19/194114 article EN Journal of Physics Condensed Matter 2010-04-26

Abstract One of the most fascinating aspects plant morphology is regular geometric arrangement leaves and flowers, called phyllotaxy. The shoot apical meristem (SAM) determines these patterns, which vary depending on species developmental stage. Auxin acts as an instructive signal in leaf initiation, its transport has been implicated phyllotaxy regulation Arabidopsis (Arabidopsis thaliana). Altered phyllotactic patterns are observed a maize (Zea mays) mutant, aberrant phyllotaxy1 (abph1,...

10.1104/pp.109.137034 article EN cc-by PLANT PHYSIOLOGY 2009-03-25

Quantifying the similarity between two mathematical structures or datasets constitutes a particularly interesting and useful operation in several theoretical applied problems. Aimed at this specific objective, Jaccard index has been extensively used most diverse types of problems, also motivating some respective generalizations. The present work addresses further generalizations index, including its modification into coincidence capable accounting for level relative interiority compared...

10.48550/arxiv.2110.09619 preprint EN cc-by-nc-nd arXiv (Cornell University) 2021-01-01

The estimation of the number people in an area under surveillance is very important for problem crowd monitoring. When reaches occupation level greater than projected one, people's safety can be danger. This paper describes a new technique density based on Minkowski fractal dimension. dimension has been widely used to characterize data texture large physical and biological sciences. results our experiments show that also levels congestion images crowds. proposed compared with statistical...

10.1109/icassp.1999.757602 article EN 1999-01-01
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