Multi User Systems
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Multi-Step-Ahead Spectrum Prediction for Cognitive Radio in Fading Scenarios
Abstract This paper analyzes multi-step-ahead spectrum prediction for Cognitive Radio (CR) systems using several future states. A slot-based scenario is used, and prediction is based on the Support Vector Machine (SVM) algorithm. The aim is to determine whether multi-step-ahead spectrum prediction has gains in terms of reduced channel-switching and increased
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-12
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2. A FRAMEWORK FOR DEVELOPING SELF-ADAPTIVE AGENTS IN MOBILE DEVICES / UM FRAMEWORK PARA DESENVOLVIMENTO DE AGENTES AUTOADAPTATIVOS EM DISPOSITIVOS MÓVEIS
Technological progress in mobile computing and the Internet promotes an achievement of the futuristic vision in which users have access to data and services anytime and anywhere. However, this vision realization brings important issues to application development, because more attention is required to the communication between mobile devices and web services,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/04/2012
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3. DESIGN, DEVELOPMENT AND INTEGRATION OF AN ENVIRONMENT SIGWEB WITH FREE SOFTWARE TOOLS / CONCEPÇÃO, DESENVOLVIMENTO E INTEGRAÇÃO DE UM AMBIENTE SIGWEB COM FERRAMENTAS DE SOFTWARE LIVRE
The dynamism and multi-tasking is now the web is necessary systems with the possibility of spatial information in a particular geographical environment with complete user interaction in building its senary information. Innovations are needed to design and develop a system for SIGWeb the spatial information, with support for various areas takes this possibili
Publicado em: 2010
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4. COMPORTAMENTO DAS COMPONENTES DE SISTEMAS MULTI-TOQUE BASEADOS EM REFLEXÃO INTERNA TOTAL CONFINADA / COMPONENTS OF A MULTITOUCH SYSTEM BASED ON FRUSTRATED TOTAL INTERNAL REFLECTION
Multitouch systems are becoming more popular replacing traditional WIMP user interfaces. A multitouch system can be based on frustrated total internal refraction of the light in an acrylic surface. With the use of commodity projectors and cameras these systems are now becoming widely affordable. Naturally the quality of these systems depends upon the right c
Publicado em: 2009
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5. Design multi-dispositivo em contextos de uso alternado e migração de tarefas / Multi-device design in contexts of interchange and task migration
With the miniaturization of digital components and the vast technological development of the past years, society has remarked the redefinition of "personal computers" by the advent of modern mobile devices. Besides the innovation, these handhelds also introduced the challenge to develop multi-device interfaces for today s desktop applications. While some cre
Publicado em: 2008
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6. UM FRAMEWORK PARA SIMULAÇÃO DA NEGOCIAÇÃO DE SERVIÇOS EM REDES SEM FIO DE NOVA GERAÇÃO / A SERVICE NEGOTIATION SIMULATION FRAMEWORK FOR NEXT GENERATION WIRELESS NETWORKS
The Wireless communication networks are increasingly present in people`s lives. Talking to friends, listening music, watching television, buying things, are examples of activities that nowadays can be accomplished by a great variety of wireless networks. Modern mobile devices have a diversity of network interfaces, for users to choose from. Due to mobility o
Publicado em: 2008
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7. SPECIFICATION OF A MULTI-AGENT SYSTEM RECOMMENDATION FOR ACTION IN CASE OF FAILURES OF SYSTEMS AUTOMATION IN CONTROL / ESPECIFICAÇÃO DE UM SISTEMA MULTIAGENTE DE RECOMENDAÇÃO DE AÇÕES EM CASO DE FALHAS DE SISTEMAS DE AUTOMAÇÃO E CONTROLE
When equipment failure occur in complex industrial plants, the automation and control system generates a great amount of alarms that can confuse the operators and lead them to take wrong decisions - the time for decision taking is very short and the amount of generated information is higher, being impossible for the operator read all of them before taking th
Publicado em: 2008
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8. Interpercepção: uma arquitetura de software para compartilhamento de ambientes virtuais com interfaces gráficas distintas
Neste trabalho, é apresentado o paradigma Interperceptivo, uma nova abordagem que inclui um conjunto de regras e uma arquitetura de software que une usuários de interfaces diferentes no mesmo ambiente virtual. O sistema detecta os recursos do usuário e realiza transformações nos dados para sua visualização nas interfaces 3D, 2D e textual (1D). Isto pe
Publicado em: 2008
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9. H-N2N : uma arquitetura hierárquica escalável para ambientes de realidade mista de grande porte
In this work, we propose a solution to solve the scalability problem found in collaborative, virtual and mixed reality environments of large scale, that use the hierarchical client-server model. Basically, we use a hierarchy of servers. When the capacity of a server is reached, a new server is created as a sun of the first one, and the system load is distrib
Publicado em: 2008
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10. Using agents and ontologies for application development on the semantic web
The Semantic Web provides access to heterogeneous, distributed information, enabling software products to mediate between user needs and the information sources available. Agents are one of the most promising technologies for the development of Semantic Web software products. However, agent-based technologies will not become widespread until there are adequa
Journal of the Brazilian Computer Society. Publicado em: 2007-12
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11. A service-based access selection algorithm for always best connected networks
It is expected that future wireless systems will consist of several distinct radio access technologies, such as WCDMA/HSDPA, GSM/EDGE/GPRS, WLAN and others, forming a mobile multi-access system offering advanced multimedia services. Together with the evermore availability of user terminals capable of operating with more than one communication technology, use
Publicado em: 2007
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12. Desenvolvimento de software para projeto e simulação da operação de uma unidade de remediação de águas subterrâneas contaminadas por BTEX.
Groundwater contamination has become a serious environmental problem nowadays. Among the different sources of contamination, leaking from tanks of fuel storage, mainly from fuel stations, is one of the most hazardous, due to the presence of toxic compounds as benzene, toluene, ethylbenzene and xylenes (BTEXs). Among the 35.585 fuel stations in Brazil, 51% ha
Publicado em: 2007