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Master's Dissertation
DOI
https://doi.org/10.11606/D.104.2023.tde-15092023-100657
Document
Author
Full name
Lissa Kido Higashizawa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2023
Supervisor
Committee
Gallo, Alexsandro Giacomo Grimbert (President)
Garcia, Nancy Lopes
Vargas Junior, Valdivino
Title in Portuguese
Propagação de rumor em uma população cética em N
Keywords in Portuguese
Cadeias semi-Markov
Probabilidade
Processo de renovação
Processo firework
Processo firework cético
Abstract in Portuguese
Consideramos dois modelos de propagação de rumor em N da literatura. Em ambos os modelos, os indivíduos (um por sítio de N) possuem raios aleatórios, independentes e igualmente distribuídos. No começo apenas o indivíduo da origem tem a informação. No primeiro modelo, firework model, cada indivíduo informado vai informar os indivíduos à sua direita que estiverem dentro do seu raio, no reverse firework model, cada indivíduo vai pegar a informação à sua esquerda, dos indivíduos informados que estiverem dentro do seu raio. Já são conhecidas na literatura as condições necessárias e suficientes sobre a distribuição dos raios para que tenha sobrevivência (probabilidade positiva de haver infinitos informados) em cada modelo. Nesta dissertação, vamos obter resultados para a extensão destes modelos quando os indivíduos acreditam na informação apenas se a receber (ou a pegar) de pelos menos 2 indivíduos informados.
Title in English
Rumor propagations in a skeptical population on N
Keywords in English
Firework process
Proability
Renewal process
Semi-markov chain
Skeptical firework process
Abstract in English
We consider two models for information propagation in N. In both models, the individuals (one per site of N) have random, independent, and equally distributed radius. At the beginning only the individual at 0 has the information. In the first model, the firework model, each informed individual will inform the individuals to its right that are within its radius, in the reverse firework model, each individual will get the information from the informed individuals on its left that are within its radius. The necessary and sufficient conditions are already known in the literature about the distribution of radius to have survival (positive probability of having infinitely many informed individuals) in each model. In this dissertation, we will obtain results for the extension of these models when individuals believe the information (get informed) only if they receive it (or take it) from at least 2 informed individuals.
 
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Publishing Date
2023-09-15
 
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