The scope of this work is knowledge management in the Semantic Web. Its contribution is the design, development, and characterisation of an application node architecture for the Semantic Web, called Swan. The core of the Swan architecture consists of an OWL knowledge base which is supplemented by a hybrid reasoning mechanism. Hybrid reasoning in Swan combines F-Logic and Description Logic reaso...

In this paper, a new hybrid classifier is proposed by combining neural network and direct fractional-linear discriminant analysis (DF-LDA). The proposed hybrid classifier, neural tree with linear discriminant analysis called NTLD, adopts a tree structure containing either a simple perceptron or a linear discriminant at each node. The weakly performing perceptron nodes are replaced with DF-LDA i...

We apply auto-tuning to a hybrid MPI-pthreads lattice Boltzmann computation running on the Cray XT4 at National Energy Research Scientific Computing Center (NERSC). Previous work showed that multicorespecific auto-tuning can improve the performance of lattice Boltzmann magnetohydrodynamics (LBMHD) by a factor of 4× when running on dualand quad-core Opteron dual-socket SMPs. We extend these stud...

Sensor networks become increasingly a key technology for complex control applications. Their potential use in safety- and time-critical domains has raised the need for task scheduling mechanisms specially adapted to sensor node specific requirements, often materialized in predictable jitter-less execution of tasks characterized by different criticality levels. This paper offers an efficient sch...

Modern supercomputers have very powerful multi-core CPUs. The programming model on these supercomputer is switching from pure MPI to MPI for inter-node communication, and shared memory and threads for intra-node communication. Consequently the bottleneck in most systems is no longer computation but communication between nodes. In this paper, we present a new compositing algorithm for hybrid MPI...

MANET is wireless mobile ad hoc network, having different routing protocol reactive, proactive and hybrid protocol. Zone Routing Protocol (ZRP) is among one of them, it is hybrid protocol i.e. combination of reactive and proactive routing protocol to maintain valid routing without too much overhead. It use pro-active protocol within a node's local zone and use reactive protocol out of node‟s zo...

This paper describes the pilot implementation of a local network by using a hybrid MACsublayer protocol (GIT-CSMA/CD) developed for hard real-time industrial Local Area Networks. This protocol outperforms standard CSMA/CD and token passing protocols as well as other hybrid protocols, in terms of mean and maximum packet delays versus throughput. Also, GIT-CSMA/CD offers bounded packet delay and ...

Master/worker is a commonly used parallel/distributed programming paradigm. Many applications are developed following such paradigm. This paradigm can be easily implemented using message passing programming libraries (MPI), but moreover, the multicore features of current nodes can be exploited at the node level by applying thread parallelism (OpenMP). In this way Master/Worker applications are ...

We present an application focused on the design of resilient longreach passive optical networks. We specifically consider dual-parented networks whereby each customer must be connected to two metro sites via local exchange sites. An important property of such a placement is resilience to single metro node failure. The objective of the application is to determine the optimal position of a set of...

To participate in communication, a network node requires an address. In wired computer networks a node receives its address according to the hierarchical context. In contrast to wired networks, Wireless Mesh Networks have flat topology, since nodes are free to move and create highly changeable context. Besides, Wireless Mesh Networks should support mobility of nodes. By merging of hierarchical ...