Statistical and Nonlinear Physics, General Physics and Astronomy, General Materials Science, Renewable Energy, Sustainability and the Environment
67
Scopus Publications
Scopus Publications
On the fractal patterns of language structures Leonardo Costa Ribeiro, Américo Tristão Bernardes, Heliana Mello Plos One, 2023 Natural Language Processing (NLP) makes use of Artificial Intelligence algorithms to extract meaningful information from unstructured texts, i.e., content that lacks metadata and cannot easily be indexed or mapped onto standard database fields. It has several applications, from sentiment analysis and text summary to automatic language translation. In this work, we use NLP to figure out similar structural linguistic patterns among several different languages. We apply the word2vec algorithm that creates a vector representation for the words in a multidimensional space that maintains the meaning relationship between the words. From a large corpus we built this vectorial representation in a 100-dimensional space for English, Portuguese, German, Spanish, Russian, French, Chinese, Japanese, Korean, Italian, Arabic, Hebrew, Basque, Dutch, Swedish, Finnish, and Estonian. Then, we calculated the fractal dimensions of the structure that represents each language. The structures are multi-fractals with two different dimensions that we use, in addition to the token-dictionary size rate of the languages, to represent the languages in a three-dimensional space. Finally, analyzing the distance among languages in this space, we conclude that the closeness there is tendentially related to the distance in the Phylogenetic tree that depicts the lines of evolutionary descent of the languages from a common ancestor.
Successive Pandemic Waves with Different Virulent Strains and the Effects of Vaccination for SARS-CoV-2 Alcides Castro e Silva, Américo Tristão Bernardes, Eduardo Augusto Gonçalves Barbosa, Igor Aparecido Santana das Chagas, Wesley Dáttilo, et al. Vaccines, 2022 One hundred years after the flu pandemic of 1918, the world faces an outbreak of a new severe acute respiratory syndrome, caused by a novel coronavirus. With a high transmissibility, the pandemic has spread worldwide, creating a scenario of devastation in many countries. By the middle of 2021, about 3% of the world population had been infected and more than 4 million people had died. Different from the H1N1 pandemic, which had a deadly wave and ceased, the new disease is maintained by successive waves, mainly produced by new virus variants and the small number of vaccinated people. In the present work, we create a version of the SIR model using the spatial localization of persons, their movements, and considering social isolation probabilities. We discuss the effects of virus variants, and the role of vaccination rate in the pandemic dynamics. We show that, unless a global vaccination is implemented, we will have continuous waves of infections.
Information, opinion and pandemic Américo T. Bernardes, Leonardo Costa Ribeiro Physica A Statistical Mechanics and Its Applications, 2021
Mechanical property assessment of interlocking plastic pavers manufactured from electronic industry waste in Brazil Luiz Gabriel, Rodrigo Bianchi, Américo Bernardes Recycling, 2021 The estimated production of world electronic waste until 2017 is approximately 6 Gt. Despite this enormous problem, there are no clear regulations regarding the orientation for disposal or treatment of this type of residuals in many countries. There is a federal public policy in Brazil that supports a network of Computer Reconditioning Centers—CRCs. These CRCs train young people and recover or recycle electronic equipment. Through this work, CRCs produce interlocking plastic pavers for application on pavements from recycled electronic industry waste. This article presents the characterization of these interlocking paver’s mechanical properties when applied on the pavement. This characterization is a necessary step to show the effectiveness of this product. We show that the plastic pavers behave similarly to the artifacts manufactured in concrete, thus creating commercial opportunities for this initiative, and contributing to the Brazilian Solid Waste Policy.
The first 80 days of the covid-19 pandemic in the city of belo horizonte: From containment to reopening Mônica Viegas Andrade, Kenya Noronha, Cassio Maldonado Turra, Gilvan Guedes, Fernanda Cimini, et al. Nova Economia, 2020 Resumo Este artigo examina o contexto e as implicações da pandemia por Covid-19 na cidade de Belo Horizonte (BH) nos primeiros 80 dias da doença. Utilizamos um recorte analítico descritivo para mensurar a evolução dos casos, o excesso de óbitos, a taxa de transmissibilidade do vírus e a pressão da doença sobre o sistema de saúde de BH e região, através da taxa de ocupação hospitalar nos leitos públicos. Além disso, identificamos as principais políticas de contenção adotadas pelas autoridades locais, bem como as implicações da redução do distanciamento social. Nossos resultados demonstram que o Sistema Único de Saúde (SUS), bem gerido, é fundamental para o enfrentamento da pandemia e a mitigação de suas consequências para a população. O processo de flexibilização que se inicia tem imposto novos desafios que requererão monitoramento atento das autoridades e da sociedade.
Ripples and grains segregation on unpaved road Tiago Moy da Silva, Américo T. Bernardes International Journal of Modern Physics C, 2018 Ripples or corrugations are common phenomena observed in unpaved roads in less developed countries or regions. They cause several damages in vehicles leading to increased maintenance and product costs. In this paper, we present a computational study about the so-called washboard roads. Also, we study grain segregation on unpaved roads. Our simulations have been performed by the Discrete Element Method (DEM). In our model, the grains are regarded as soft disks. The grains are subjected to a gravitational field and both translational and rotational movements are allowed. The results show that wheels’ of different sizes, weights and moving with different velocities can change corrugations amplitude and wavelength. Our results also show that some wavelength values are related to specific wheels’ speed intervals. Segregation has been studied in roads formed by three distinct grain diameters distribution. We observed that the phenomenon is more evident for higher grain size dispersion.
Preface Journal of Physics Conference Series, 2018
VII Brazilian Congress on Metrology (Metrologia 2013) Rodrigo Costa-Félix, Americo Bernardes, José Carlos Valente de Oliveira, José Mauro Granjeiro, Ruth Epsztejn, et al. Journal of Physics Conference Series, 2013
Business networks and their effects on tourism Angela Cabral Flecha, Alcides Volpato Castro e Silva, José Paulo Alves Fusco, Américo Tristão Bernardes RAE Revista De Administracao De Empresas, 2012
Computer simulation of the direct iron reduction in MIDREX ovens 35th Apcom Symposium Application of Computers and Operations Research in the Minerals Industry Proceedings, 2011
A fractal approach for mineral breakage 35th Apcom Symposium Application of Computers and Operations Research in the Minerals Industry Proceedings, 2011
Global analysis of the immune response Leonardo C. Ribeiro, Ronald Dickman, Américo T. Bernardes Physica A Statistical Mechanics and Its Applications, 2008
Monte Carlo simulation of inherited longevity Paulo M.C de Oliveira, Suzana Moss de Oliveira, Americo T Bernardes, Dietrich Stauffer Physica A Statistical Mechanics and Its Applications, 1999
