We present an interactive virtual reality platform for studying the role of embodied social interaction in the context of language learning. The virtual environment consists of virtual objects, a virtual table, and most importantly, a set of virtual students with different social-cognitive skills. Real users are asked to serve as language teachers and teach virtual learners object names. They c...

Compilers for modern object-oriented programming languages generate code in a platform independent intermediate language [LY99, CLI06] preserving the concepts of the source language; for example, classes, fields, methods, and virtual or static dispatch can be directly identified within the intermediate code. To execute this intermediate code, state-of-the-art implementations of virtual machines...

Higher level programming languages provide problem solvers an access to computers without requiring them to become computer experts. In the traditional environment, compilers perform the relatively complex translation from the higher level language statements into the machine instructions. The differences between the complex data structures and operations of languages and typical simple structu...

Many researchers have underlined the benefits of student mobility in strengthening their communication skills. Studying a foreign language and fostering knowledge about behavioural attitudes are most common research cases. One major issues mobility, by its very nature, is that it implies significant travel accommodation costs. Virtual or Exchange (VE), can be introduced as proactive alternative...

With the convergence of computing and communication, and the expansion of cloud computing, new models and tools are needed to allow users to define, create, and exploit on-demand virtual infrastructures within wide area distributed environments. Optimally designing customized virtual execution-infrastructure and executing them on a physical substrate remains a complex problem. This paper presen...

Data grid applications require often an access to infrastructures with high performance data movement facilities coordinated with computational resources. Other applications need interconnections of large scale instruments with HPC platforms. In these context, dynamic provisioning of customized computing and networking infrastructure as well as resource virtualization are appealing technologies...

NestStep is a parallel programming language for the BSP (bulk–synchronous–parallel) model of parallel computation. Extending the classical BSP model, NestStep supports dynamically nested parallelism by nesting of supersteps and a hierarchical processor group concept. Furthermore, NestStep adds a virtual shared memory realization in software, where memory consistency is relaxed to superstep boun...