Abstract: In this article, we describe a media monitoring system that we have developed and implemented for the Secretariat General of Communication and Secretariat General of Information in Greece (SGC-SGI). The system applies emerging technologies for audiovisual recording, speech recognition, language processing, multimedia indexing, and retrieval, all integrated into a large video and audio library that covers broadcast news and current affairs in Greek and English. It assists SGC-SGI in compiling information; annotating and analyzing news; and monitoring national, political, social, economic, cultural, and environmental issues concerning Greece in general
Abstract: Modelling and simulation have been assigned crucial roles in the design, development, analysis and evaluation of computer architectures. The design of parallel architectures in particular is a complex and difficult endeavour that makes modelling and simulation essential tools. In this case, high simulation performance is a prerequisite since, large workloads need to be simulated for a realistic analysis of the parallel system. This paper presents the approach that has been followed for the modelling and simulation of PiSMA, a virtual shared memory parallel architecture, scaleable up to 100 s of processors.
Abstract: Parallel processors reduce the communication overhead problem with the employment of some form of global communication network. This network however, imposes restrictions on the scalability and technological evolution of the parallel processor. In this paper a novel architecture called PiSMA (Parallel Virtual Shared Memory Architecture) is proposed, which consists of a basic substrate, without a network, providing neighborhood connectivity for local communication. The same architecture can be upgraded, by the addition of a global network. The simulated performance of such an upgradable parallel computer is measured with a wide range of parallel applications and fault tolerant issues are discussed. It is found that the substrate connectivity can provide an effective fault tolerant parallel computer for a large class of applications, while the incorporation of a global network broadens the spectrum of applications that can be executed efficiently by the PiSMA architecture
