Julio César Paulino de Melo

Interperception on Shared Virtual Environments

In this work we introduces the concept of interdimensional virtual environments and proposes to it creation an architecture based on the client-server model. Our architecture allows the users with different resources sharing the same environment in a transparent way, same that users are connected by a different graphical interfaces. This interdimensionality provides by the system is possible thanks to the use of a component in the serving side that if put in charge to carry through, when necessary, the transformation of the messages of a dimension for another one, removing or adding indispensable information to the different customers of the system

Context-Aware Adaptation of Component-Based Systems: An Active Repository Approach

Context-aware systems are able to monitor and automatically adapt their operation accordingly to the execution context in which they are introduced. Component-based software engineering (CBSE) focuses on the development and reuse of self-contained software assets in order to achieve better productivity and quality. In order to store and retrieve components, CBSE employs component repository systems to provide components to the system developers. This paper presents an active component repository that is able to receive the current configuration from the context-aware system and compute the components and the new architecture that better fit the given context. Since the repository has a wide knowledge of available components, it can better decide which configuration is more suitable to the running system. The repository applies Fuzzy logic algorithm to evaluate the adequacy level of the components and GRASP algorithm to mount the new system architecture. In order to verify the feasibility of our approach, we use a digital TV middleware case study to achieve experimental results.

A path editor for virtual museum guides

In this work we propose a tool for path generation of animated beings (devices as robots, and humans) in a virtual environment. The focus of this application is the creation and edition of this path for guided tour in virtual museum. To validate this approach we present a virtual exhibition were a virtual guide following the generated path and conduces the virtual visitors in the museum.

GTMV: Virtual museum authoring systems

In this work we propose a system that has joined the multi-user system paradigm and the easy-to-use authoring tools for the development of virtual museums through the Web. Our system provides an interface for authoring and another interface for navigation. The authoring interface is used by the curator and has tools for building and editing museums. The navigator interface is used by visitors to interact with the museum including its objects and other users.

Indirect group interaction in interpeceptives virtual environments

This paper proposes a component that can capture a variety of user movements and use that to create information and interaction with computational applications, like electronic games and Interactive Digital TV Programs in a pervasive approach. Some techniques and systems get information from the user, like thoughts and actions, to provide extra functionality but that is done for one user at each time. The component proposed here bases itself on observing the user, thus it is able to detect his thoughts and feelings based on his actions, providing ways for users to interact seamlessly and for the system to change its outputs and states based on whatever the users are doing. Besides that, systems might be created to support multiple inputs from groups of users providing a whole new range of outputs. The events generated through these users observation are referred here as Indirect Group Interaction.

TrendTV: An architecture for automatic change of TV channels based on social networks with multiple device support

In this work, we present the TrendTV architecture, a set of software layers that links various TV show viewers, producing a personalized recommendation system. In this architecture is possible to indicate the quality of a TV show in real time through the interaction between viewers using a social network that can be accessed through several different ways. Associated with a personalized Electronic Programming Guide, this social network allows the viewer to perform filtering on a particular subject from the indication made by other viewers through the interactivity over the Web, interactive TV or through a mobile device. The result is a dynamic database containing the classification of several TV programs built from that architecture, and an application that change automatically to the best channel at the moment.

An architecture that allows event based computing for environment sensing systems

This paper proposes a architecture to enable the implementation of event based environment systems. The proposed solution integrates hardware and software components in a platform with the Nios II processor in the order to process the data and generate events to used by other applications. Hardware speed and parallelism are added to the flexibility and simple structure of event based programs simplifying the system architecture, making the processing faster and easy to develop.

ITV-telearch an architecture for enabling device telecontrol and sensor data access over IDTV systems

Our work provides the specification and implementation of a communication mechanism between broadcast content viewers and interaction devices or sensors placed on the scenario of a live video show. This solution was designed using middleware based architecture and interconnects the devices and sensors of a broadcast program environment in a device network. By using the proposed architecture, the viewers will be able to see the real world interaction devices and control them through interactive applications using specific APIs to each broadcast system. So this approach is able to manage the devices in the network despite of the physical layer used to communicate, allowing them to communicate to each other and to be controlled by external applications. Afterwards, by using the architecture, we can allow viewers to control or access data from entities which compound the network through distributed communication processes and control applications. In order to validate our work we present a test scenario where a mobile robot with a set of sensors is added to our architecture and controlled by the viewers.

Virtual multiverse: Interperception in multiple virtual universes

In this paper we propose a design and implementation of a collaborative virtual environment that supports virtual multiverse. With this, we are creating an infra-structure that allows the insertion of all possible and imaginable virtual worlds, allowing the coexistence of these different virtual worlds in a same application. On this system, the users can visit many different words using a same avatar.

The H-N2N framework: towards providing interperception in massive applications

We propose a framework with a flexible architecture that have been designed and implemented for collaborative interaction of users, to be applied in massive applications through the Web. We introduce the concept of interperception and use technologies as massive virtual environments and teleoperation for the creation of environments (mixing virtual and real ones) in order to promote accessibility and transparency in the interaction between people, and between people and animate devices (such as robots) through the Web. Experiments with massive games, with interactive applications in digital television, with users and robots interacting in virtual and real versions of museums and cultural centers are presented to validate our proposal.