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A (ir)regularity-aware task scheduler for heterogeneous platforms

This paper addresses the design, implementation and validation of an e ective scheduling scheme for both regular and irregular applications on heterogeneous platforms. The scheduler uses an empirical performance model to dynamically schedule the workload, organized into a given number of chunks, and follows the Heterogeneous Earliest Finish Time (HEFT) scheduling algorithm, which ranks the tasks based on both t...

Preface and biographic notes for the special issue on graphics for serious games

The use of serious games and applications has emerged as a dominating force in training, education and simulation due to the focus on creating compelling interactive environments at reduced costs by adopting its capacity of engaging younger hi-tech generations in the highly motivated gaming environments and to the opportunities offered by the commodity technologies commonly associated with the entertainment ind...

Cross-Fire : a grid platform to integrate geo-referenced web services for real-...

Fire propagation simulation tools are useful at different levels of forest fire management. From prescribed fire planning to fuel hazard assessment or to the development of fire suppression strategies on wildfires or even training activities. Nevertheless, real time use of such tools is still very limited among the operational authorities for several reasons: lack of good real time data, lack of training or eve...

An OGC/SOS conformant client to manage geospatial data on the GRID

This paper describes a Sensor Observation Service (SOS) client developed to integrate dynamic geospatial data from meteorological sensors, on a grid-based risk management decision support system. The present work is part of the CROSS-Fire project, which uses forest fires as the main case study and the FireStation application to simulate fire spread. The meteorological data is accessed through the SOS standard f...

A platform to support civil protection applications on the GRID

The CROSS-Fire is a Portuguese NGI funded project focus-ing on the development of a grid-based risk management decision support system for the Civil Protection (CP), using forest fires as the main case study. The project defines a general approach for the development of a CP application by defining an architecture that integrates three main layers: the CROSS-Fire Platform and two external infrastructures: a Spa...

Bridging the gap between applications geospatial data and the Grid

CROSS-Fire : a risk management decision support system on the Grid

The CROSS-Fire project aims to develop a grid-based risk management decision support system for the Civil Protection (CP) authorities, using forest fires as the main case study and FireStation as a standalone CAD application to simulate the fire spread over complex topography. CROSS-Fire approach is based in an architecture that includes: information models, encodings, and metadata that represent the scientific...

FireStation on the grid : a step further on the adoption of OGC/SDI standards

The project CROSS-Fire aims to develop a grid-based risk management decision support system for civil protection (CP) using forest fires as the main case study and FireStation (FS) as the standalone CAD application that simulates the fire spread over complex topography. The previous work focused on (i) parallelisation of the fire propagation execution model and (ii) integration on the EGEE infrastructure to sup...

Refinement criteria for high fidelity interactive walkthroughs

Physically based global illumination rendering at interactive frame rates would enable users to navigate within complex virtual environments, such as archaeological models. These algorithms, however, are computationally too demanding to allow interactive navigation on current PCs. A technique based on image subsampling and spatiotemporal coherence among successive frames is exploited, while resorting to progres...

JaSkel: a java skeleton-based framework for structured cluster and grid computing

This paper presents JaSkel, a skeleton-based framework to develop parallel and grid applications. The framework provides a set of Java abstract classes as a skeleton catalogue, which implements recurring parallel interaction paradigms. This approach aims to improve code efficiency and portability. It also helps to structure scalable applications through the refinement and composition of skeletons. Evaluation re...