Guest editorial: Real-time database systems

Guest Editorial: Distributed Simulation, Virtual Environments and Real Time Applications

Welcome to this special issue of Simulation: Transactions of the Society for Modeling and Simulation International on ‘Distributed Simulation, Virtual Environments and Real Time Applications’. The papers included in this special issue are based mainly on selected extended versions of the best papers accepted in the 2006 International Symposium on Distributed Simulation and Real Time Application...

Real Time Database Systems

Guest Editorial Special Section on Real-Time and (Networked) Embedded Systems III

T HE design of embedded systems requires the development of efficient platforms supported by innovative technologies , methodologies, and algorithms. The interaction with the environment, the timing of the operations, the communication networks, and last but not least the market requirements, however , pose significant challenges to the designers. This is especially true for safety-critical app...

Hybrid Computer Systems [Guest editorial]

Today's increasing emphasis on simulation of continuous dynamic systems lends a special significance to this issue of Computer. Hybrid computers, with their tremendous computing speed resulting from the all-parallel configuration of their analog subsystem, are particularly suited for dynamic system simulation. Indeed, back in the 1950's analog computers were the only game in town when it came t...

Guest Editorial Semantic reference systems

Four centuries after René Descartes watched a fly walk across his ceiling and wondered how to capture its position (Gribbin 2002), we use Cartesian coordinates routinely to describe locations. We identify the positions of entities in the real world, transform their GIS representations from one coordinate system to another, and integrate spatially referenced data across multiple coordinate syste...