Dissertações em Engenharia Elétrica (Mestrado) - PPGEE/ITEC

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/2316

O Mestrado Acadêmico inicou-se em 1986 e pertence ao Programa de Pós-Graduação em Engenharia Elétrica (PPGEE) do Instituto de Tecnologia (ITEC) da Universidade Federal do Pará (UFPA).

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Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Ferramenta computacional para dimensionamento e avaliação de desempenho de sistemas fotovoltaicos conectados à rede elétrica
(Universidade Federal do Pará, 2012-10-11) PINTO FILHO, Gilberto Figueiredo; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
This dissertation presents the utilization of some mathematical models present on literature which represent the energy processing steps on Grid-Connected Photovoltaic Systems (GCPV). Besides, two models regarding the power limitation due to inverter’s temperature and the electric losses are proposed. All models are implemented at MATLAB GUIDE enviroment which allows the analysis, helps on the design and makes possible the operacionality simulation and and energy contribution of GCPV with diferent sizes. The work presents the program interface developed and its data validation by comparing it with experimental data. Some energy forecasting for five Brazilian cities are shown at the end of the work with examples on how analyze the data generated by the program.
Acesso aberto (Open Access)
IPSFlow: Um framework para Sistema de Prevenção de Intrusão baseado em Redes Definidas por Software
(Universidade Federal do Pará, 2013-10-09) NAGAHAMA, Fábio Yu; ABELÉM, Antonio Jorge Gomes; http://lattes.cnpq.br/5376253015721742; CERQUEIRA, Eduardo Coelho; http://lattes.cnpq.br/1028151705135221
Intrusion Detection and Prevention Systems (IDSs/IPSs) are well known tools and well enshrined in the world of information security. However, the lack of integration with network equipment, such as switches and routers, tends to limit the performance of these tools leads to require a proper dimensioning of hardware resources such as processor, memory and high-speed network interfaces used to implement them. Faced with several limitations encountered by researchers and network administrators, the concept of Software Defined Network (SDN), that separates the data and control planes, emerged allowing to adapt the operation of the network according to their needs. Thus, due to standardization and flexibility offered by SDNs, and the limitations presented by IDSs, this dissertation proposes IPSFlow, a framework that uses a network based on the SDN architecture, and the OpenFlow protocol, to create an IPS with wide coverage that blocks a malicious traffic in the equipment closer to the origin. To validate the framework, experiments in the virtual Mininet environment were conducted using Snort as IDS to analyze scanning traffic generated by Nmap from a host to another. The results show that the IPSFlow worked as planned by blocking almost 85% of scanning traffic.

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