Experiments with wireless sensor networks have shown that unidirectional communication links are quite common. What is even more, they have also shown that the range of a unidirectional link can exceed that of a bidirectional one by far. Still, most of todays routing protocols do not use them, they only eliminate their implications. Those protocols that do use unidirectional links introduce a l...

We present a parallel Preconditioned BiConjugate Gradient Stabilized(BICGstab) solver for the Poisson problem. Given a real, nosymmetric and positive definite coefficient matrix , the parallized Preconditioned BICGstab -solver is able to find a solution for that system by exploiting the massive compute power of todays GPUs.Comparing sequential CPU implementations and that algorithm.we achieve a...

In this paper an approach towards scalable group (many-tomany) communication across ATM networks is presented. Many network based applications rely on the concept of groups with dynamic membership. Todays ATM networks do not provide an adequate support for group communication as for example is available with IP multicast. In this document a hierarchical solution is described that adapts to the ...

Todays data stream management systems (DSMSs) lack security functionality. Based on adversary scenarios we show how a DSMS architecture can be protected. We sketch a general DSMS architecture and introduce security issues that need to be considered. To face the threats we develop an extended system architecture that provides the necessary security mechanisms. We descuss the chosen concepts and ...

The emerging area of Multimodality can be well demonstrated in the operation of a Telecom. Within France Telecom there are thriving fixline, Internet and mobile businesses that can benefit from the use of Multimodal interactions. In todays networks, Multimodal interactions are particularly relevant to the mobile space, where constraints of the network and handset have a driving influence on the...

The Lattice Boltzmann method (LBM) is a well established algorithm to simulate fluid flow. The complexity of todays 3D simulation problems resulting in long computation times together with the fact that a standard implementation of the LBM only achieves a small fraction of the potential of a modern CPU is the motivation for this performance analysis. We show in our paper, that it is crucial to ...

In todays bioinformatics, Mass spectrometry (MS) is the key technique for the identification of proteins. A prediction of spectrum peak intensities from pre computed molecular features would pave the way to better understanding of spectrometry data and improved spectrum evaluation. We propose a neural network architecture of Local Linear Map (LLM)-type for peptide prototyping and learning local...

Todays companies face increasing complexity and dynamics in their processes, which lead to problems for centralized decision making in logistic process control. Thus, autonomously controlled logistic processes are proposed to overcome the induced negative effects. Logistic objects employ additional infrastructure components providing decision making and execution abilities to solve process cont...