Hernane B. de B. Pereira

Centro Universitário Senai Cimatec · Modelagem Computacional

This paper uses time varying graphs to evaluate the Brazilian production structures, assessing the relationship across economic sectors overtime given important macroeconomic shocks in the country. We use the annual Brazilian input-output matrices from the World Input-Output Database for the period 1995-2011. Our results show possible positive impa...

Cohesion is one of the main defining characteristics of textuality. There is a lack of approaches to textual cohesion benefiting from both high computational implementability, and compatibility with established theories of text organization and comprehension. The main goal of this study was to define indices of textual cohesion based on lexical rep...

Este artigo é fruto de pesquisa de doutoramento que buscou investigar um modelo de avaliação de políticas públicas para tornar efetiva a implantação de políticas de segurança, sendo essas vistas como um sistema que pode ser submetido a avaliação por meio do Modelo Baseado em Agentes (MBA). O objetivo geral do trabalho consiste em analisar, por meio...

One of the first steps in protein sequence analysis is comparing sequences to look for similarities. We propose an information theoretical distance to compare cellular automata representing protein sequences, and determine similarities. Our approach relies in a stationary Hamming distance for the evolution of the automata according to a properly ch...

In this work, we model an individual social career by a finite-size trajectory along a hexagonal lattice moving only forward. At each bifurcation, the individual makes a free-will choice to follow one or the other branch within an uncertain outcome. Considering that those choices are determined by an individual self built from endogenous characteri...

This study proposes utilizing affinity networks to characterize writing profiles by examining pausing behavior during writing tasks. Data from 34 participants was collected using Inputlog. Pauses were used to create visibility graphs, and the resulting graph metrics were used to build an affinity network. The network was then analyzed to group writ...

One of the first steps in protein sequence analysis is comparing sequences to look for similarities. We propose an information theoretical distance to compare cellular automata representing protein sequences, and determine similarities. Our approach relies in a stationary Hamming distance for the evolution of the automata according to a properly ch...

Introduction The transformation of data into information is important to support decision making and, thus, to induce improvements in healthcare services. The regionalized organization of healthcare systems is necessary to ensure the integrity of citizen care. From this perspective, the creation of mechanisms to guide and assess the behavior of a h...

Protein sequences encode information on their function and, when compared to the same proteins of different species, on their evolutionary relationships. We show in the present work how to analyze protein sequence similarities between different animal species using cellular automata imaging, which can be used to classify them according to common an...

In this paper we analyze the descriptive statistics of the Google search volume for the terms related to the National Reserve of Copper and Associates (RENCA), a Brazilian mineral reserve in the Amazon of 4.6 million hectares, before and after the government signed the decree releasing it for exploration. First, we analyze the volume of searches fo...

A presente pesquisa traz resultados da atuação profissional de egressos do Ensino de Física no Brasil, no período de 1972-2006. O objetivo deste artigo é o de apresentarmos o método de construção de uma rede complexa de 2-modos/rede de afiliação tendo como base os autores de dissertações, teses de doutorado e de livre docência e os atuais locais de...

Knowledge can be represented through semantic networks, which have the advantages of being simple, clear, and easy to visualize. The literature points to the existence of a diversity of “semantic network” definitions, which can be conceived of as structures based on graphs with edges or arcs. According to this assumption, vertices can be assigned m...

In this article, we present the results of research using a network index, called the vertex reduction factor, to quantify and to sort the disciplinarity of journals. The index is based on the repeatability of article title words. Titles were obtained from 16 journals from different areas of knowledge. We took as a reference the Scopus database, wh...

As mídias sociais são importantes canais de difusão de informações em saúde. O objetivo deste artigo é apresentar um modelo de estudo métrico de informações para minerar temáticas relacionadas à covid-19 no Facebook, intitulado AC-Redes semânticas de hashtags. O modelo é composto pelos métodos de análise de redes semânticas e de análise de coocorrê...

Introduction: The transformation of data into information is important to support decision making and, thus, to induce improvements in healthcare services. The regionalized organization of healthcare systems is necessary to ensure the integrity of citizen care. From this perspective, the creation of mechanisms to guide and assess the behavior of a...

Introduction: The transformation of data into information is important to support decision making and, thus, to induce improvements in healthcare services. The regionalized organization of healthcare systems is necessary to ensure the integrity of citizen care. From this perspective, the creation of mechanisms to guide and assess the behavior of a...

This article reviews the literature regarding maritime networks, including identifying the essential articles and authors and suggesting a categorization of associated topics. Network theory in logistics demonstrates strategic information about and competitive advantages of maritime transport between regions. We analyzed 145 technical/scientific st...

This paper aims to deepen the discussion about the productive interdependence and regional resilience among the Brazilian states and regions through an input-output network analysis to identify emergent patterns or properties within the Brazilian states. We use an inter-regional IO matrix, the base year 2011, for the 27 Brazilian states and 68 sect...

Several vaccines against COVID-19 are now available, based on different techniques and made by different laboratories spread around the world. With the roll out of the vaccination process in an advanced stage in many countries, and the reduced hospitalization risk by the Omicron relative to Delta variant infection, despite the higher transmission r...

This paper proposes an analysis of the financial market of 14 countries of the European Union, under the vision of the dynamic networks using the motif-synchronization method. It is found that the countries of Central Europe (France, the Netherlands, Germany, and the UK) are the most influential in the remaining exchanges of the European Union coun...

This paper aims to analyse the connectivity of 13 stock markets , between 1998 and 2019, with a time-varying proposal, to evaluate evolution of the linkage between these markets over time. To do so, we propose to use a network built based on the correlation coefficients from the Detrended Cross-Correlation Analysis, using a sliding windows approach...

Para o estudo de padrões emergentes em redes semânticas, as métricas pertencentes às redes sociais e complexas podem ser utilizadas. Este artigo tem como objetivo apresentar o método de construção e as análises das redes semânticas complexas formadas pelos títulos pertencentes às dissertações e teses defendidas em Ensino de Física no Brasil, entre...

Abstract This work presents an approach to study the diffusion of knowledge in software development project teams based on the formation of complex social network structures in a public organization that offers information and communication technology services. We collected historical data on the allocation and records of hours worked by people in...

A gestão arquivística de documentos e a difusão do conhecimento em saúde constituem-se em um estudo pertinente e oportuno, tanto do ponto de vista acadêmico como do ponto de vista técnico-científico. Contribui de forma efetiva para uma prática arquivística transformadora na área de saúde. A relação entre a organização das informações em saúde e seu...

Soccer is a worldwide sport. Every 4 years since 1930, the sport stimulates a growing number of people, countries, and money during the Soccer World Cup. This scientific treatment of matches using complex networks and social networks focuses on the teams participating in the tournaments, as well as on the interaction between players. The present wo...

Most feature extraction algorithms for music audio signals use Fourier transforms to obtain coefficients that describe specific aspects of music information within the sound spectrum, such as the timbral texture, tonal texture and rhythmic activity. In this paper, we introduce a new method for extracting features related to the rhythmic activity of...

Most feature extraction algorithms for music audio signals use Fourier transforms to obtain coefficients that describe specific aspects of music information within the sound spectrum, such as the timbral texture, tonal texture and rhythmic activity. In this paper, we introduce a new method for extracting features related to the rhythmic activity of...

Este livro trata do resultado terapêutico em grupos de Narcóticos Anônimos (NA). Para compreender esse processo de recuperação, fomos buscar aportes teóricos e epistemológicos sobre adicção, dinâmica sociais em grupos, bem como as bases epistemológicas dessas relações grupais, além de métodos e técnicas adequados ao estudo. Fomos até antes das or...

Objective: to analyze the constitutive contents of the social representations of suicide by health professionals in the emergency department through an analysis of the cognitive network. Method: study based on the Theory of Social Representations carried out with 104 emergency room professionals from a hospital in Bahia, Brazil. A free word associa...

Recent work has employed information theory in social and complex networks. Studies often discuss entropy in the degree distributions of a network. However, no specific work on entropy exists in clique networks. This work is an extension of a previous study that discussed this topic. We propose a method for calculating the entropy of a clique netwo...

Resumo A pesquisa que originou este artigo teve por objetivo analisar representações sociais de profissionais emergencistas sobre a prevenção das reincidências por tentativa de suicídio. Tratou-se de uma pesquisa com base na teoria das representações sociais na abordagem processual, com trinta emergencistas de um hospital público na Bahia, realizad...

Big data has become a very frequent research topic, due to the increase in data availability. In this introductory paper, we make the linkage between the use of big data and Econophysics, a research field which uses a large amount of data and deals with complex systems. Different approaches such as power laws and complex networks are discussed, as...

This paper aims to analyze the effects of Covid-19 on financial markets from the perspective of Complexity. The Covid-19 pandemic has caused turmoil in financial markets and is already one of the most important financial crises in history, causing a fall in several stock markets as well as great volatility. Unlike past crises, which in most cases w...

O trabalho aborda redes dos títulos das dissertações de mestrados em matemática, no Brasil. A análise usa redes semânticas de títulos (RST) para caracterizar qualitativa e quantitativamente as redes. Foram selecionados 41 cursos de mestrado e construídas as RST usando-se a abordagem de redes por cliques, na qual as palavras dos títulos são mutuamen...

Oil is one of the most important products in the world, being used for fuel production but also as an input in several industries. After the oil shocks of the 1970s, which caused great turbulence, the interest in the analysis of this particular product grew. The analysis of the comovements between oil and other assets became a hot topic. In this st...

Este trabalho propõe investigar a rede semântica de cliques baseada em ementas de um programa de pós-graduação de doutorado. Foram coletadas 46 ementas de componentes curriculares. Usando alguns índices de redes sociais e complexas como ponto de partida, observou-se que as centralidades de grau, proximidade e intermediação são índices adequados par...

Recent works have used information theory in complex networks. Studies often discuss entropy in the degree distributions of a network. However, there is no specific work for entropy in clique networks. In this regard, this work proposes a method to calculate clique network entropy, as well as its theoretical maximum and minimum values. The entropie...

The newly published article by Arruda, Cândido & Fonseca (1) reports the possible negative impacts of the Amazon fires in August 2019 on the Brazilian agribusiness, mainly for the European market. However, it is important to address some additional issues before defining if agribusiness will be really harmed.

The newly published article by Arruda, Cândido & Fonseca (1) reports the possible negative impacts of the Amazon fires in August 2019 on the Brazilian agribusiness, mainly for the European market. However, it is important to address some additional issues before defining if agribusiness will be really harmed.

The newly published article by Arruda, Cândido & Fonseca (1) reports the possible negative impacts of the Amazon fires in August 2019 on the Brazilian agribusiness, mainly for the European market. However, it is important to address some additional issues before defining if agribusiness will be really harmed.

The global energy landscape is rapidly changing, including the transition to a low carbon economy and the use of liquid biofuel. The production of liquid biofuel has emerged as an alternative to the use of fossil fuels for purposes of energy conservation, carbon emission mitigation and agricultural development. In this article we study the co-movem...

Este artigo apresenta a aplicação de um modelo de análise de redes no estudo de rede formada no processo de interação ensino e serviço na saúde. O trabalho integrado da academia com os serviços de saúde é uma estratégia que permite problematizar as aprendizagens nas unidades de saúde em parceria com os serviços públicos de saúde. Com o objetivo de...

Atualmente, as mídias sociais têm sido muito utilizadas para buscar e compartilhar informações sobre alimentação saudável. O objetivo deste estudo foi analisar a representação do termo “alimentação saudável” no Instagram por meio de uma rede de hashtags de cliques. O estudo foi conduzido em sete etapas. As hashtags mais importantes em termos de gra...

Mudanças cognitivas na vida de um sujeito podem ser avaliadas através de manifestações indiretas, como o comportamento e a linguagem. Apresentamos um Metamodelo teórico para analisar as mudanças de valores, crenças e de conduta de indivíduos quando estão em grupos. A mudança que produz uma reeducação cultural pode ser compreendida a partir das teor...

Este artigo apresenta uma aplicação da teoria de redes sob o ponto de vista da logística brasileira, especificamente o modal aquaviário e sua tipologia cabotagem. Tal análise foi permitida, a partir da disponibilidade dos dados estatísticos sobre a movimentação de cargas no Brasil advindos do Sistema Aquaviário da Agência Nacional de Transportes Aq...

O artigo apresenta os resultados das contribuições do jogo Líder Sim para estimulação especialmente da função executiva de planejamento, promovendo o exercício da liderança e gestão de recursos. Com o objetivo de avaliar o protótipo foi realizada uma sessão de testes com o grupo de 10 estudantes de distintos cursos de graduação. Os estudantes inter...

Since his inauguration on January 1, 2019, Jair Bolsonaro, a declared right-wing candidate nicknamed “Tropical Trump,” has introduced measures to reduce environmental restrictions on livestock farming, the main greenhouse gas (GHG) producing sector in Brazil that is responsible for most of the deforestation in the country. This dangerous relationsh...

In this chapter, we present an analysis of the capacity of six topologies of neural networks—multilayer perceptron (MLP), complete (CP), random (RD), scale-free (SF), small world (SW), and hybrid (HY)—to perform next-step predictions of temperature and solar radiation. For this purpose, 100 networks of each complex topology, including an MLP networ...

RESUMO O trabalho apresenta um recorte analítico que utilizou os fundamentos da Teoria e Ciência das Redes para o campo de análise da saúde mental de escolares, tendo como objetivo conhecer e assim, traçar metas institucionais com programa de apoio. Os dados utilizados foram coletados de levantamento de dados preliminares, que organizados e analisa...

The relationship between oil prices and stock markets is commonly studied, in order to understand how financial markets are influenced by this important real asset. The evidence of any kind of interdependence is important, because investors could have additional information about the evolution of those kinds of assets. In this paper, we analyse the...

O trabalho apresenta um recorte analítico que utilizou os fundamentos da Teoria e Ciência das Redes para o campo de análise da saúde mental de escolares, tendo como objetivo conhecer e assim, traçar metas institucionais com programa de apoio. Os dados utilizados foram coletados de levantamento de dados preliminares, que organizados e analisados sub...

Para o estudo de padrões emergente em redes semânticas, podem ser utilizadas as métricas pertencentes às redes sociais e complexas. Este artigo tem como objetivo analisar uma rede semântica formada pelas palavras-chave, pertencentes às dissertações e teses apresentadas e defendidas em Ensino de Física no Brasil, entre os anos de 1972 a 2006. Descre...