There has long been a recognition that syntactic structure alone does not provide enough information for machine understanding of human language. Various efforts under the auspices of MUC [8] have added limited-coverage semantic lexicons in order to improve the performance of the systems under

sustainability can emerge only after transition to the next, superior level of civilisation complexity, which implies qualitative and unified changes in all aspects of life, including knowledge, production, so-cial organisation, and infrastructure. These changes are specified by a rigorous analysis of underlying

Four candidate spectral plans are studied for applicability to residential broadband service deployment based on asymmetric VDSL.. Three of the spectral plans are new, and one has been previously proposed by others. The analysis results indicate that this previously-proposed plan is not suitable for residential broadband, as it gives too much bandwidth to the upstream channel and not enough to the downstream. This fourth plan also requires an extra band transition above 2 MHz, which is unnecessary from a differential capacity perspective and harmful in the realistic case of analog-assisted duplexing. Among the remaining plans, Plan #3 has the advantage of highest downstream capacity on the long loop, while Plan #1 has the highest downstream capacity for the short and medium loop. The lower frequency placement of the asymmetric upstream band imparts to Plan #1 a number of other practical advantages. It is proposed that Plans #1 and #3 be considered as the two candidates for an asymmet...

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is essential to high-performance parallel computing. Next, we argue that the lack of system integration exhibited by user-level threads is a consequence of the lack of kernel support for user-level threads provided by contemporary multiprocessor operating systems; we thus argue that kernel threads or processes

One of the key factors determining computer performance is the degree to which the implementation can take advantage of instruction-level paral-lelism. Perhaps the most critical limit to this parallelism is the presence of conditional branches that determine which instructions need to be executed

dedicated processors that perform a good portion, if not the bulk of the computations. The author gives some highlights of her experiences with various types of simulations and libraries, including PETSc, and provides some predictions on how Extreme Computing will take tomorrow’s simulations to the next

to the design of a data grid, namely, storage systems and metadata management. Next, we explain how these services can be used to develop higher-level services for replica management and replica selection. We conclude by describing our initial implementation of data grid functionality.

Enterprise search is vital for today’s enterprises. The ongoing growth of information in enterprises demands new solutions for finding relevant information in the information space. The personalization of search results is one promising approach in solving this challenge. Additionally, ontologies stoke expectations of easing the information integration process for federated search results by their formal and declarative nature. In this poster we present our novel approach of an ontology-based personalized enterprise search. We introduce an ontology-based federation layer for bridging the heterogeneity of the different knowledge sources in an enterprise. 1.

Energy efficiency as a design goal opens new market opportunities; the omnipresent microcontroller has evolved to hit the green button and system cost targets simultaneously. The time has come for environmental consciousness. Global warming, rising energy prices, and unacceptable thermal footprints have evolved from topics of conversation to causes for action. More than ever before, consumers are paying attention to energy ratings and showing a strong interest in alternative technologies such as hybrid vehicles, "green " white goods and LED lighting. In a "from the top down " approach, governments around the world are tightening electronic design criteria by enacting ever more stringent regulations-- turning what used to be "nice to have " features into design imperatives. In addition to the ultimate prize of a more inhabitable planet, the green movement is also creating a cornucopia of electronic design opportunities in nascent applications such as solar and wind power, hybrid vehicles, and LED lighting. But green also means radically improving the efficiency of familiar applications such as motors, white goods, and appliances. This paper focuses on energy efficiency advancements in three innovative areas: solar micro-inverters,