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Formulations and algorithms to design communication networks
(Universidade Federal de Minas GeraisUFMG, 2012-05-11)
The study of networks has roots in graph theory dating back to 1730s. From then on, networks have been used to model and simulate interactions among elements of intricate systems, such as transportation, communication and ...
Topological design of Wireless sensor network: Formulations and exact algorithms
(Universidade Federal de Minas GeraisUFMG, 2018-08-31)
The subject of this thesis is the design of Wireless Sensor Networks (WSN). Given a limited set of sensors and a single sinks, we are particularly interested in the topological WSN design problem. This problem consists in ...
Fundamentos pragmáticos da teoria ator-rede para análise de ações comunicacionais em redes sociais online
(Universidade Federal de Minas GeraisUFMG, 2018-04-25)
This thesis investigates how and to what extent the notion of mediation, delineated by the Actor- Network Theory (ANT), contributes to characterize communicational actions in online social networks by specifying the ...
Treinamento de redes neurais artificiais baseado em sistemas de estrutura variável com taxa de aprendizado adaptativa
(Universidade Federal de Minas GeraisUFMG, 2007-03-09)
This work presents new algorithms for training multilayer perceptron artificial neural networks based on stability properties of sliding mode variable structure systems. The main feature of the proposed algorithms is the ...
Tie strength in co-authorship social networks: analyses, metrics and a new computational model
(Universidade Federal de Minas GeraisUFMG, 2017-04-20)
In social networks, tie strength has been largely explored in different contexts, such as information diffusion and evaluation of scientific productivity. In this thesis, we measure the strength of co-authorship ties in ...
Governança em rede: estudo da estrutura relacional no projeto A Cor da Cultura
(Universidade Federal de Minas GeraisUFMG, 2014-05-30)
The overall objective of this thesis is to identify and analyze how the relational structure of the interorganizational network 'the Color of the Culture' influences its governance structure. The study refers to the third ...
Overlay construction strategies for peer-to-peer live streaming systems
(Universidade Federal de Minas GeraisUFMG, 2017-11-17)
Video streaming now amounts to the majority of traffic on the Internet. Media streaming relies on large-scale content distribution networks (CDNs), that incur significant costs to build or use. Peer-to-peer distribution ...
Da metáfora à substância: redes sociais, redes migratórias e migração nacional e internacional em Valadares e Ipatinga
(Universidade Federal de Minas GeraisUFMG, 2002-12-18)
This work aims at analyzing the connections among the international emigration, the international migratory network and the internal migratory networks, considering two complementary analytic perspectives of social network: ...
Data dissemination solutions for wireless ad hoc network
(Universidade Federal de Minas GeraisUFMG, 2013-12-09)
Wireless ad hoc networks have gained a lot of momentum in the last few years due to their ability to enable spontaneous networking. In those networks, nodes cooperate in a distributed fashion way to spontaneously establish ...
Uai sô, e agora?: as relações entre fatores sociodemográficos e incapacidades funcionais nas redes sociais de idosos em Belo Horizonte/MG
(Universidade Federal de Minas GeraisUFMG, 2012-04-26)
This thesis aims at analyzing the social networks of the elderly (60 years old and over) in view of demographic and epidemiological factors. To this end, we used data of PNAD's (1998, 2003 and 2008) about Minas Gerais, as ...