Ismael Andrade - Academia.edu (original) (raw)

Papers by Ismael Andrade

Resumo A globalização transformou o design de engenharia num processo distribuído geograficamente... more Resumo A globalização transformou o design de engenharia num processo distribuído geograficamente. A adoção disseminada de Realidade Virtual para o design e a necessidade de agir e deixar notas directamente nos objectos em discussão, levou a projectos sobre anotações em Ambientes Virtuais Colaborativos (AVCs). No entanto, as abordagens convencionais ainda estão limitadasà metáfora do post-it amarelo com texto. Na verdade, multimédia, comoáudio, esboços, vídeo e animações permitem uma maior expressividade que poderia ser aproveitada nos AVCs. Além disso, anotações individuais não conseguem captar nem a lógica, nem o fluxo de discussão, que são fundamentais para compreender as decisões de design do projeto. Neste artigo, apresentamos uma abordagem com anotações multimédia estruturadas, que suportam a discussão e tomada de decisão em tarefas de revisão de design de projectos. Além disso, suportamos a argumentação baseada em Issues para revelar a proveniência de decisões de projetos de engenharia. Embora esta seja uma exploração inicial do espaço de soluções, exemplos mostram um maior apoioà revisão de projetos colaborativos, em relaçãoàs abordagens tradicionais.

International Journal of Virtual Reality, 2013

The emergence of cheaper technologies for immersive environments has considerably increased the i... more The emergence of cheaper technologies for immersive environments has considerably increased the interest in Virtual Reality applications. However, VR frameworks currently available force user applications to be developed specifically for them. This increases the cost of converting an existing application to another virtual reality environment. This paper proposes a new framework, the LVRL (Lightweight Virtual Reality Libraries), which allows the creation or conversion of existing applications to VR without changing the application's structure. The LVRL's main objective is to provide a nonintrusive and transparent programming interface that allows the development of VR applications by non-VR developers. This paper describes LVRL's architecture, features, usage, and benefits obtained by applications using it.

Anais Do Congresso Brasileiro De Custos Abc, 2014

Proceedings of the 2004 ACM SIGGRAPH international conference on Virtual Reality continuum and its applications in industry - VRCAI '04, 2004

In this paper we discuss the scenario of Petroleum Engineering projects of Petrobras, a large Bra... more In this paper we discuss the scenario of Petroleum Engineering projects of Petrobras, a large Brazilian governmental oil & gas company. Based on this scenario, we propose a set of application requirements and system architecture to guide the construction of a Collaborative Engineering Environment (CEE) for assisting the control and execution of large and complex industrial projects in oil and gas industry. The environment is composed by the integration of three different technologies of distributed group work: Workflow Management System (WfMS), Multimedia Collaborative System (MMCS) and Collaborative Virtual Environments (CVE).

The 7th International Conference on Computer Supported Cooperative Work in Design

Este artigo apresenta um modelo para a categorização de colaboração apoiada por computador em vár... more Este artigo apresenta um modelo para a categorização de colaboração apoiada por computador em vários níveis, de acordo com o suporte fornecido à comunicação, à coordenação, à cooperação e à interoperabilidade. O modelo apresentado é útil para a definição do nível de colaboração desejado em cenários industriais ou do nível que se pode atingir com a tecnologia e os recursos existentes. Essas idéias são ilustradas por meio de ferramentas colaborativas da área de Computação Gráfica sendo desenvolvidas para uma grande empresa da área de petróleo.

Proceedings of the 12th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and Its Applications in Industry - VRCAI '13, 2013

2008 12th International Conference on Computer Supported Cooperative Work in Design, 2008

Lecture Notes in Computer Science, 2008

We present an SOA for executing engineering simulations and visualizing results in a Virtual Envi... more We present an SOA for executing engineering simulations and visualizing results in a Virtual Environment. Different technologies of group work are used to compose a Collaborative Problem Solving Environment that enables engineers to setup computations in an integrated environment.

2012 14th Symposium on Virtual and Augmented Reality, 2012

The emergence of cheaper technologies for immersive environments has increased considerably the i... more The emergence of cheaper technologies for immersive environments has increased considerably the interest on applications of Virtual Reality (VR). However, currently available VR frameworks force user applications to be developed specifically for them. This increases the cost of converting an existing graphical application to virtual reality environments. This paper proposes a new framework, the LVRL (Lightweight Virtual Reality Libraries), which allows both creation and conversion of existing applications to VR without changing the structure of the application. The LVRL main objective is to provide a minimalist programming interface and non intrusive allowing the development of VR applications by non VR developers. This article describes the architecture of LVRL, its features, usage and the benefits obtained by the applications that use it.

2014 XVI Symposium on Virtual and Augmented Reality, 2014

Industrial environments require well trained professionals to handle equipments which are usually... more Industrial environments require well trained professionals to handle equipments which are usually complex or operate in risky situations. The training these professionals receive many times is only theoretical, excluding the practical part due to costs and possible risks that training may pose. To solve this, there has been an increasing interest in using serious games that mock real scenarios and allow professionals to perform operations that previously would only be possible in a real environment. In this work a model is proposed for the development of this kind of application, called SimTJS, which focuses on industrial plant environments. The components that compose the model are discussed, as well as examples that make use of it. Resumo-Ambientes industriais requerem profissionais bem treinados para lidar com equipamentos muitas vezes complexos ou até situações de risco. A capacitação desses profissionais muitas vezes se dá de forma apenas teórica, deixando a parte prática de fora devido aos custos e aos possíveis riscos que um treinamento prático pode oferecer. Por isso há um interesse crescente na utilização de jogos sérios que imitam cenários reais, permitindo que os profissionais realizem operações que antes só seriam possíveis em um ambiente real. Nesse trabalhó e proposta uma arquitetura para esse tipo de aplicação, o SimTJS, como foco em ambientes de plantas industriais. São discutidos os componentes que compõem a arquitetura, além de exemplos de utilização da mesma.

2014 12th IEEE International Conference on Industrial Informatics (INDIN), 2014

Remote locations such as ultra-deep water reservoirs (400 m or deeper) have been increasing the p... more Remote locations such as ultra-deep water reservoirs (400 m or deeper) have been increasing the production complexity and logistic costs for Oil & Gas industry. In such conditions, oil exploration feasibility depends on new technologies to optimize production efficiency. One possible solution to this challenge is to increase the degree of automation in production units. New design concepts consider the use of robotic devices in such scenarios. In this paper we present the use of virtual reality techniques in a robotics framework, SimUEP-Robotics (Robotics Simulator for Stationary Production Units), aimed to enable planning the offshore platform robotizing. SimUEP-Robotics has an integrated Virtual Reality Engine specially tailored to provide realistic visualization of large offshore scene models in an immersive environment. Through the use of those visualization tools it is possible, for example, to better understand the quality of the planned robot trajectory and propose new algorithms that can be further evaluated in the virtual environment. We argue that the validation process in an immersive virtual environment reduces risks and costs of real operation tests scenarios.

Lecture Notes in Computer Science, 2011

The main objective of this article is to find effective solutions for collaboration of team worke... more The main objective of this article is to find effective solutions for collaboration of team workers during the execution of Large Scale Engineering Projects (LSEP). The research is based on actual operational needs of Petrobras, a large Brazilian governmental oil & gas company. For this article we have focused on Offshore Engineering Projects as our case study. We have implemented a Service Oriented Architecture aimed to create a collaborative environment, called CEE (Collaborative Engineering Environment), for visualizing engineering simulations considering important requirements identified for LSEPs, such as collaboration, workflow coordination, and immersive visualization. CEE allows team workers to concentrate in the task of solving a problem using seamlessly the computational resources available, from the execution of engineering simulations on a Grid to the collaborative visualization of results in an immersive or desktop environment.

2011 XIII Symposium on Virtual Reality, 2011

Due to emerging new technologies in the development of interactive 3D applications (eg games and ... more Due to emerging new technologies in the development of interactive 3D applications (eg games and virtual reality), stereoscopic visualization is becoming a common feature. However, this fact does not solve some problems (nausea and headaches-cybersickness) related with the generation of this type of visualization. Some parameters have to be carefully chosen to create a comfortable stereo view, for example, eye distance, zero parallax plane distance, and the treatment of partially clipped objects in negative parallax. This paper presents a technique based on a CubeMap structure to dynamically adjust stereo parameters during the usage of two virtual reality tools in multi-scale 3D scenarios.

2008 32nd Annual IEEE Software Engineering Workshop, 2008

In this paper we present a Service Oriented Architecture for executing engineering simulations an... more In this paper we present a Service Oriented Architecture for executing engineering simulations and visualizing results in a Virtual Environment. The architecture composes a Collaborative Problem Solving Environment that enables engineers to setup computations in an integrated environment. The work is motivated by the necessity of finding effective solutions for collaboration of team workers during the execution of complex Petroleum Engineering projects.

2013 XV Symposium on Virtual and Augmented Reality, 2013

Interaction in engineering virtual environments differs by the necessity of the high precision le... more Interaction in engineering virtual environments differs by the necessity of the high precision level needed for the execution of specifics tasks for this kind of environment. Generally this kind of task uses specific interaction devices with 4 or more DOF. Current applications involving 3D interaction use interaction devices for object modelling or for the implementation of navigation, selection and manipulation tecniques in a virtual environment. A related problem is the necessity of controlling tasks that are naturally non-immersive, such as symbolic input (e.g., text, photos). Another problem is the large learning curve to handle such non-conventional devices. The addition of sensors and the popularization of smartphones and tablets, allowed the use of such devices in virtual engineering environments. Thes devices, besides their popularity and sensors, differs by the possibility of including additional information and performing naturally non-immersive tasks. This work presents a 3D interaction tablet-based tool, which allows the aggregation of all major 3D interaction topics, such as navigation, selection, manipulation, system control and symbolic input.

Proc. Symposium on …, 2009

This paper presents the implementation and evaluation of model based markerless 3d tracking techn... more This paper presents the implementation and evaluation of model based markerless 3d tracking techniques, aiming the development of augmented reality applications. Recursive and non-recursive methods based on edge and texture information were contemplated, enabling object tracking in a wide range of scenarios. Tracking performance and accuracy results obtained using different configurations of the implemented techniques were compared and evaluated.

High quality non-interactive 3D Videos are largely used to document projects, present innovative ... more High quality non-interactive 3D Videos are largely used to document projects, present innovative products and ideas, and to explain complex concepts. On the other hand, in spite of its highly interactive characteristic, virtual reality (VR) suffers due to the non-photorealistic image quality. This research presents an approach for combining 3D rendered videos with interactive scenes. The goal is to overcome the lack of realism in VR models and improve presence and expectation in simulations.

A Educacao Fiscal e um tema ainda incipiente para o grande publico, mas de relevante significado ... more A Educacao Fiscal e um tema ainda incipiente para o grande publico, mas de relevante significado social. Por meio dela, busca-se desenvolver uma relacao de parceria entre o Estado e a sociedade: de um lado, o Estado conscientiza-a sobre o papel dos tributos e repassa-lhe o conteudo necessario para que seja possivel a participacao popular no controle dos gastos publicos; de outro, estimula a sociedade a adimplir com regularidade suas obrigacoes tributarias. O corpus deste trabalho e o material pedagogico criado pela Escola de Administracao Fazendaria (ESAF) e utilizado no Programa Nacional de Educacao Fiscal (PNEF). Com base nos postulados da nova retorica de Perelman & Olbrechts-Tyteca (2005), e em Meyer (2007), serao vistos os modos pelos quais se da o percurso argumentativo dos acordos com o auditorio, seus argumentos e a retorica envolvida para a persuasao.

Griot : Revista de Filosofia, 2014

O foco deste artigo é realçar as contribuições de Deleuze e Guattari (1995) sobre a linguagem, e ... more O foco deste artigo é realçar as contribuições de Deleuze e Guattari (1995) sobre a linguagem, e como se articula com o legado de Canetti (2005) e as noções de palavras de ordem, discurso indireto – além dos conceitos mais conhecidos de agenciamento, imanência e a formação de saber. Além disso, explica-se a relação entre o discurso e o poder, tal como é compreendida por Fairclough (1989 e 2001) e a conexão que o poder tem com as estruturas sociais. A aproximação entre a linguagem e o poder foi contemplada por esses autores a partir de uma perspectiva diferente, enquanto Deleuze e Guattari (1995) voltavam-se para o poder imanente da linguagem, Fairclough (1989 e 2001) focou no poder existente a partir da relação entre o discurso e a estrutura social.