A computacao ubiqua define um novo modelo computacional de interacao homem-maquina cujo processam... more A computacao ubiqua define um novo modelo computacional de interacao homem-maquina cujo processamento de informacoes se integra a objetos do dia a dia e atividades do usuario. A utilizacao de um dispositivo movel neste paradigma permite que diversos elementos computacionais e sistemas auxiliem o usuario em suas tarefas e atividades. Em alguns casos, o usuario nao estara ciente da presenca e atividade destes elementos computacionais no ambiente em que se encontra. Em ambientes moveis e/ou ubiquos, informacoes de perfil e contexto do usuario/aplicacao mudam constantemente em um determinado periodo. Servicos presentes no dispositivo movel e em servidores remotos tambem necessitam utilizar de uma forma transparente as informacoes de contexto local e remoto, a fim de proverem a adaptacao em servicos e atividades do usuario movel. Estes dois fatores apresentam em sistemas ubiquos a necessidade de gerenciamento e compartilhamento destas mudancas com outros componentes e sistemas.Este traba...
ABSTRACT An important aspect in the design of pervasive/ubiquitous applications is to evaluate th... more ABSTRACT An important aspect in the design of pervasive/ubiquitous applications is to evaluate them before their deployment in real scenarios. A possible strategy to assess them is to perform simulations that provide useful insights and results to the application designer. However, the simulation of pervasive/ubiquitous applications and environments has proven to be a considerable challenge for several reasons. For instance, many of the technologies (e.g., hardware and software) required to assess them either do not yet exist or are not momentarily available or accessible in terms of cost and readiness, not to mention other important requirements such as monitoring, communication management and profile/context state tracking of entities in the system. In order to make this process simpler and feasible, we defined a Web assessment tool that provides a simulation approach for ubiquitous environments by using Web technologies such as Asynchronous JavaScript and XML, Web application frameworks and a mapping/location Web service. Using these technologies, we implemented a pervasive service: a tourist guide service. With this tool, we were able to evaluate the proposed service quantitatively by studying the interactions between the users/entities involved, monitor their profile/context states, and track their movements across a predefined map area.
disseminating this information in the network. We evaluate the detection rate and the efficiency ... more disseminating this information in the network. We evaluate the detection rate and the efficiency of our solution along a number of parameters.
Ubiquitous computing defines a new paradigm in which devices with processing and communication ca... more Ubiquitous computing defines a new paradigm in which devices with processing and communication capacity are embedded into everyday elements, providing services in a transparent way to users. It is possible to notice that this kind of computing has a strong connection with physical world features, as well as those presented by its users profiles. In this way, if ubiquitous systems are capable of using as input relevant information about entities (e.g., people, places or objects) related to the application, they can provide services that are more appropriate, dynamic and optimized, increasing the user satisfaction and minimizing resource consumption, such as energy, processing, communication, among others. Such information is called context and represents the basic input element for context-aware computing. The goal of this short course is to discuss research trends on the ubiquitous context-aware field, presenting and analyzing the research performed on specific challenges. Such proposal presents interesting solutions to problems ranging from physical aspects of wireless communication to the design of applications available to the users.
A computacao ubiqua define um novo modelo computacional de interacao homem-maquina cujo processam... more A computacao ubiqua define um novo modelo computacional de interacao homem-maquina cujo processamento de informacoes se integra a objetos do dia a dia e atividades do usuario. A utilizacao de um dispositivo movel neste paradigma permite que diversos elementos computacionais e sistemas auxiliem o usuario em suas tarefas e atividades. Em alguns casos, o usuario nao estara ciente da presenca e atividade destes elementos computacionais no ambiente em que se encontra. Em ambientes moveis e/ou ubiquos, informacoes de perfil e contexto do usuario/aplicacao mudam constantemente em um determinado periodo. Servicos presentes no dispositivo movel e em servidores remotos tambem necessitam utilizar de uma forma transparente as informacoes de contexto local e remoto, a fim de proverem a adaptacao em servicos e atividades do usuario movel. Estes dois fatores apresentam em sistemas ubiquos a necessidade de gerenciamento e compartilhamento destas mudancas com outros componentes e sistemas.Este traba...
ABSTRACT An important aspect in the design of pervasive/ubiquitous applications is to evaluate th... more ABSTRACT An important aspect in the design of pervasive/ubiquitous applications is to evaluate them before their deployment in real scenarios. A possible strategy to assess them is to perform simulations that provide useful insights and results to the application designer. However, the simulation of pervasive/ubiquitous applications and environments has proven to be a considerable challenge for several reasons. For instance, many of the technologies (e.g., hardware and software) required to assess them either do not yet exist or are not momentarily available or accessible in terms of cost and readiness, not to mention other important requirements such as monitoring, communication management and profile/context state tracking of entities in the system. In order to make this process simpler and feasible, we defined a Web assessment tool that provides a simulation approach for ubiquitous environments by using Web technologies such as Asynchronous JavaScript and XML, Web application frameworks and a mapping/location Web service. Using these technologies, we implemented a pervasive service: a tourist guide service. With this tool, we were able to evaluate the proposed service quantitatively by studying the interactions between the users/entities involved, monitor their profile/context states, and track their movements across a predefined map area.
disseminating this information in the network. We evaluate the detection rate and the efficiency ... more disseminating this information in the network. We evaluate the detection rate and the efficiency of our solution along a number of parameters.
Ubiquitous computing defines a new paradigm in which devices with processing and communication ca... more Ubiquitous computing defines a new paradigm in which devices with processing and communication capacity are embedded into everyday elements, providing services in a transparent way to users. It is possible to notice that this kind of computing has a strong connection with physical world features, as well as those presented by its users profiles. In this way, if ubiquitous systems are capable of using as input relevant information about entities (e.g., people, places or objects) related to the application, they can provide services that are more appropriate, dynamic and optimized, increasing the user satisfaction and minimizing resource consumption, such as energy, processing, communication, among others. Such information is called context and represents the basic input element for context-aware computing. The goal of this short course is to discuss research trends on the ubiquitous context-aware field, presenting and analyzing the research performed on specific challenges. Such proposal presents interesting solutions to problems ranging from physical aspects of wireless communication to the design of applications available to the users.
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Papers by Waldir Pires