Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 126-132). Available also in a digital version from Dissertation Abstracts.

Made available in DSpace on 2014-06-11T19:24:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-12Bitstream added on 2014-06-13T20:30:51Z : No. of bitstreams: 1 batista_ml_me_sjrp.pdf: 463940 bytes, checksum: 249902ec3d15fc568bd77e0e39843cbb (MD5) / Este trabalho apresenta um sistema de detecção de eventos em redes de computadores baseado em métodos não-supervisionados. O sistema possui como base a utilização do padrão IPFIX (IP Flow Information Export) para exportação de informações sumarizadas de redes de computadores. O projeto tem como princípio a utilização de métodos não-supervisionados para a detecção de novidades. Detecção de novidade, neste projeto, é definida como detecção de eventos de rede que não são conhecidos previamente. O projeto mostra-se pioneiro na utilização de detecção de novidades baseada em métodos não-supervisionados utilizando fluxos bidirecionais, empreendendo características importantes aos sistemas de segurança computacional, como escalabilidade no monitoramento de redes de alta velocidade, detecção rápida a tentativas ilícitas de acesso, intrusão e ataques de negativa de serviço (DoS), consideradas grandes ameaças atualmente na Internet / In this work is presented an event detection system in a computer network based on unsupervised methods. The system is based on the use of the IPFIX standard (IP Flow Information Export) to export the summarized information of a computer network. The project is based in the use of unsupervised methods for novelty detection. Novelty detection, in this project, is defined as detection of network events that are not previously known. The project is pioneer in the use of novelty detection based on unsupervised methods using bidirectional flows, containing important characteristics to computer security systems, such as scalability in high-speed networks monitoring, fast detection of illicit activities, intrusion and denial of services attacks, considered major threats on the Internet today

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains ix, 86 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 82-86).

Thesis (M.S.)--University of West Florida, 2009. / Submitted to the Dept. of Computer Science. Title from title page of source document. Document formatted into pages; contains 66 pages. Includes bibliographical references.

Thesis (M.E.)--University of Canterbury, 2006. / Typescript (photocopy). Includes bibliographical references (p. 77-78). Also available via the World Wide Web.

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains x, 89 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 81-89).

Orientador: Adriano Mauro Cansian / Banca: Alex Sandro Roschildt Pinto / Banca: Edson dos Santos Moreira / Resumo: Este trabalho apresenta um sistema de detecção de eventos em redes de computadores baseado em métodos não-supervisionados. O sistema possui como base a utilização do padrão IPFIX (IP Flow Information Export) para exportação de informações sumarizadas de redes de computadores. O projeto tem como princípio a utilização de métodos não-supervisionados para a detecção de novidades. Detecção de novidade, neste projeto, é definida como detecção de eventos de rede que não são conhecidos previamente. O projeto mostra-se pioneiro na utilização de detecção de novidades baseada em métodos não-supervisionados utilizando fluxos bidirecionais, empreendendo características importantes aos sistemas de segurança computacional, como escalabilidade no monitoramento de redes de alta velocidade, detecção rápida a tentativas ilícitas de acesso, intrusão e ataques de negativa de serviço (DoS), consideradas grandes ameaças atualmente na Internet / Abstract: In this work is presented an event detection system in a computer network based on unsupervised methods. The system is based on the use of the IPFIX standard (IP Flow Information Export) to export the summarized information of a computer network. The project is based in the use of unsupervised methods for novelty detection. Novelty detection, in this project, is defined as detection of network events that are not previously known. The project is pioneer in the use of novelty detection based on unsupervised methods using bidirectional flows, containing important characteristics to computer security systems, such as scalability in high-speed networks monitoring, fast detection of illicit activities, intrusion and denial of services attacks, considered major threats on the Internet today / Mestre

The objective of this thesis is creating a design of a redundant secure VPN WAN network for Medical Emergency Service of Pardubice region. The starting point of this thesis is the analysis of the current state of the corporate computer network, which was evaluated as not satisfying. The result is a design of WAN network, which satisfies the requirements of the investor. The solution also includes the project of implementation and financial calculation of the project.

Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006. / The distributed control system network involves analog data acquisition nodes interconnected through CAN and USB protocol interfaces to form a network. The network is designed to be generically applicable to various control problems. This network of controllers was specifically utilised on a scaled-down electrostatic roll separator plant used in the mineral processing industry. A SISO and a MIMO regulator was designed to demonstrate the regulation of plant parameters. The MIMO regulator was employed in a scheme that optimises the plant yield automatically. Analog data acquisition nodes were designed and built especially for the purposes of this project. These nodes were installed on the electrostatic roll separator plant. PC based application software was written so that plant ID experiments could be performed. SISO and MIMO regulators along with a yield optimising scheme was designed and implemented in the application software. Both SISO and MIMO regulators successfully regulated plant outputs. The nonconducting mineral product grade was regulated by the SISO regulator. The non-conducting mineral product grade and conductor mineral mass flow was regulated by the MIMO regulator. The yield optimiser successfully employed the MIMO regulator to optimise the plant yield automatically.

Thesis (M.S.)--Baylor University, 2005. / Includes bibliographical references (p. 120-121).