Computer Networks Performance
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. Breast tumor classification in ultrasound images using support vector machines and neural networks
Abstract Introduction The use of tools for computer-aided diagnosis (CAD) has been proposed for detection and classification of breast cancer. Concerning breast cancer image diagnosing with ultrasound, some results found in literature show that morphological features perform better than texture features for lesions differentiation, and indicate that a reduc
Res. Biomed. Eng.. Publicado em: 10/10/2016
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2. All-optical cryptography through spectral amplitude and delay encoding
All-optical data encryption is a promising technology that could lead communication systems to an unprecedented degree of security. In this paper we use computer simulations to systematically investigate a new all-optical cryptography technique that is bit-rate independent and transparent to modulation formats. Encryption encompasses signal spectral slicing
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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3. Architecture for generic detection of machine code injection in computer networks
Since the creation of public exploitation frameworks, advanced payloads are used in computer attacks. The attacks generally employ evasion techniques, have anti-forensics capabilities, and use target machines as pivots to reach other machines in the network. The attacks also use polymorphic malicious code that automatically transforms themselves in semantica
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/06/2012
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4. A proposal towards resilient complex networks through evaluation and adaptation mechanisms
Attacks and failures tolerance of complex networks is related to the concept of vulnerability in different contexts, from biology and sociology to computer science and physics. Studies have revealed that the topologies of these networks are inherently vulnerable to failures of central elements. Complex adaptive systems, emergent in nature, are considered mor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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5. Desenvolvimento de um controlador preditivo baseado em redes neurais para aplicação em uma planta de polimerização de estireno / Development of a predictive controller based on neural networks for use in a polymerization plant of styrene
Indústrias de polimerização, em geral, utilizam diferentes sistemas reacionais para obter polímeros com diferentes características. Os processos de polimerização de estireno em batelada podem a apresentar um perfil de temperatura transiente, por causa de efeitos de viscosidade no meio reacional, são chamados de efeitos difusionais. Com a finalidade d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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6. Uma proposta de Framework para simulação de redes OTN
New Technologies for optical networks present a significant challenge for researchers involved with the new generation of high-performance networking, especially when we are talking about optimizing the current infrastructure available in the optical fiber backbones. In this context the computer simulations present themselves as flexible alternatives for the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/10/2010
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7. ESTIMAÇÃO DE UMA FRONTEIRA EFICIENTE PARA AVALIAR O DESEMPENHO DE ISPs, ATRAVÉS DA ANÁLISE ENVOLTÓRIA DE DADOS (DEA) / ESTIMATION OF AN EFFICIENT FRONTIER FOR ASSESSING THE PERFORMANCE OF ISPs, THROUGH Data envelopment analysis (DEA)
A Análise Envoltória de Dados (DEA Data Envelopment Analysis) é um método de estimação de fronteira Pareto-Koopmans eficiente, não-paramétrica, que auxilia tomadores de decisão a avaliarem Unidades de Tomada de Decisão (DMUs Data Making Units) ou firmas sob uma ótica de estimação de pontos de referência, baseados na eficácia e produtividade. D
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2010
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8. Application of artificial neural networks commitee machine in the solution of an inverse radiative transfer problem / Aplicação de máquinas de comitê de redes neurais artificiais na solução de um problema inverso em transferência radiativa
This work is based on the concept of neural networks committee machine and has the objective to solve the inverse radiative transfer problem in one-dimensional, homogeneous, absorbing and isotropic scattering media. The artificial neural networks committee machine adds and combines the knowledge acquired by an exact number of specialists which are represente
Publicado em: 2010
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9. Proposta de interconexão do padrão ISO 11783 com redes de sensores sem fio padrão ZigBee. / A proposal for interconnection between ISO 11783 standard network and ZigBee wireless sensor networks.
Precision Agriculture is one of the technological advances used to recoup the treatment of spatial and temporal variability in agricultural crops. Besides other benefits, it tries to improve the exploitation of applied inputs, improve the productivity and reduce production cost as well as lessen the impact on environment caused by excess of input. To achieve
Publicado em: 2010
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10. GERAP : gerenciamento de redes de alta performance / GERAP - high performance netwoks management
Este trabalho apresenta um estudo dos mecanismos de policiamento de tráfego ATM (Asynchronous Transfer Mode) mais conhecidos e uma analise das condições de seu gerenciamento utilizando o protocolo SNMP (Simple Network Management Protocol). Para este fim foram considerados os objetos gerenciados integrantes de MIBs (Management Information Base) propostas p
Publicado em: 2010
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11. WAVELET-BASED ANOMALY DETECTION IN NETWORK TRAFFIC / UM DETECTOR DE ANOMALIAS DE TRÁFEGO DE REDE BASEADO EM WAVELETS
Attacks on computer networks compromises the security of the system and degrade the performance of the network causing problems to users and organizations. Networkbased Intrusion Detection Systems are used to detect attacks or malicious activity by analyzing the network traffic. The anomaly-based detection approach is used for intrusion detection. It is assu
Publicado em: 2010
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12. Auxílio à leitura de textos em português facilitado: questões de acessibilidade / Reading assistance for texts in facilitated portuguese: accessibility issues
The large capacity of Web for providing information leads to multiple possibilities and opportunities for users. The development of high performance networks and ubiquitous devices allow users to retrieve content from any location and in different scenarios or situations they might face in their lives. Unfortunately the possibilities offered by the Web are n
Publicado em: 2010