7 documents found, page 1 of 1
Information flow in brazilian food market: The influence of the 2008 financial ...
Passo, Thiago Matheus Paiva do; Silva, Joelma Mayara da; Araújo, Lidiane da Silva; Stosic, TatijanaBrazilian agribusiness is gaining more and more international prominence thanks to the relevant production and export of agricultural commodities, as well as the great potential for development that this economic sector has in the country. The subject has attracted the attention of several researchers because, as the export sector grows, prices of these commodities for domestic consumption tend to rise, affecti...
Analysis of the regularity of wind velocity in Northeast Brazil through Sample ...
Santana, Lêda Valéria Ramos; Stosic, Tatijana; Ferreira, Tiago Alessandro Espínola; Silva, Antonio Samuel Alves daThe use of renewable sources has grown worldwide and in Brazil the incentive to use wind energy has been significantly expanded. The country's largest wind potential is concentrated in the Northeast (NE). The objective of this work is to measure the degree of regularity or predictability of wind velocity over Brazilian NE through the Sample Entropy method. The analyzes were carried out from the historical serie...
Complexity analysis of monthly precipitation in the state of Pernambuco using S...
Silva, Cleo Clayton Santos; Menezes, Rômulo Simões Cezar; Stosic, Tatijana; Silva, Antonio Samuel Alves daRainfall is one of the phases of the hydrological cycle responsible for the return of the condensed water from the atmosphere to the Earth's surface. It is a natural process of utmost importance for ecosystem functioning because it regulates water availability for various uses and environmental services. The present work aims to assess the rainfall variability in Pernambuco, Brazil, using monthly precipitation ...
Recurrence quantification analysis of Brazilian prices of corn, soybean and chi...
Santana, Leika Irabele Tenório de; Silva, Joelma Mayara da; Araújo, Lidiane da Silva; Moreira, Guilherme Rocha; Stosic, TatijanaCorn and soybean meal are the most used inputs in poultry feed production in Brazil. Changes in the prices of these inputs influence the price and consumption of chicken meat. With this in mind, this work aims to analyse the dynamics of chicken, corn and soybean prices individually and jointly, using the Recurrence Plot method, its extension, the Cross Recurrence Plot and the Recurrence Quantification Analysis,...
Using Sample Entropy to assess complexity of wind speed dynamics
Silva, Gutenberg Ferreira da; Silva, Antonio Samuel Alves da; Stosic, TatijanaIn this paper we analyzed the complexity of the time series of wind speed in Petrolina, Brazil at heights of 25 and 50 m. We applied the sample entropy (SampEn) method on wind speed temporal series for each month of 2010, in order to analyze the intra-annual variability of complexity for wind dynamics and its relation with the wind potential. The results showed that wind speed fluctuations are more regular when...
A Brief multifractal analysis of rainfall dynamics in Piracicaba, São Paulo, Br...
Xavier Júnior, Sílvio Fernando Alves; Stosic, Tatijana; Stosic, Borko; Jale, Jader Da Silva; Xavier, Érika Fialho MoraisThe aim of this study was to evaluate the statistical properties of a daily rainfall time series recorded in Piracicaba river basin, state of Sao Paulo, Brazil in the period 1917-2016. We apply Multifractal Detrended Fluctuation Analysis (MF-DFA) on deseasonalized data and calculate generalized scaling exponents, h(q). We find that h(q) is a decreasing function of q, indicating multifractal behavior of precipit...
Lacunarity analysis of daily rainfall data in Pernambuco, Brazil
Lucena, Leandro Ricardo Rodrigues de; Xavier Junior, Silvio Fernandes; Stosic, Tatijana; Stosic, BorkoHere we report a study of the temporal variation in daily rainfall recorded at meteorological stations in the state of Pernambuco, Brazil using the method of lacunarity to evaluate dry spell distribution. Results indicate coastal region rainfall has lower lacunarity and shows a more homogeneous behaviour with respect to dry spell duration. In the semiarid and dry regions rainfall series demonstrate higher lacu...