1,721,670 research outputs found
Riqualificazione e gestione paesaggistica e ambientale delle aree fluviali
No full textIl breve contributo tratta le possibili logiche di intervento del patrimonio dei paesaggi fluviali, nell'ottica di riqualificazione paesaggistica e ambientale e trattando possibili logiche di gestione
A class of code compression schemes for reducing power consumption in embedded microprocessor systems
No full textCompression of executable code in embedded microprocessor systems, used in the past mainly to reduce the memory footprint of embedded software, is gaining interest for the potential reduction in memory bus traffic and power consumption. We propose three new schemes for code compression, based on the concepts of static (using the static representation of the executable) and dynamic (using program execution traces) entropy and compare them with a state-of-the-art compression scheme, IBM's CodePack. The proposed schemes are competitive with CodePack for static footprint compression and achieve superior results for bus traffic and energy reduction. Another interesting outcome of our work is that static compression is not directly related to bus traffic reduction, yet there is a trade off between static compression and dynamic compression, i.e., traffic reduction
Application-driven method and apparatus for limiting power consumption in a processor-controlled hardware platform
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Piattaforme Hardware per Terminali Mobili di Terza Generazione
No full textIl capitolo illustra l'architettura di piattaforme hardware per terminali mobili di terza generazione. Si tratta di veri e propri sistemi integrati in rapida evoluzione. La potenza di calcolo aumenta in funzione delle richieste delle applicazioni, sempre più orientate verso la fornitura di servizi multimediali. Detta potenza di calcolo viene sempre più fornita attraverso la integrazione di un numero crescente di unità di elaborazione. Di conseguenza, crescono i requisiti di banda richiesti ai bus di comunicazione, che stanno evolvendo da bus condivisi, ad architetture multi-layer fino a soluzioni innovative di tipo network-on-chip
Protocol Stack and System Software Optimization for Energy Efficient Wireless Embedded Systems
No full textThe widespread use of battery-operated embedded systems with wireless communication capabilities (e.g., PDAs, palmtop computers, cell phones, networked sensors, etc.) has generated significant research interest in energy efficient design techniques. This paper provides an overview of techniques developed at University of Bologna, in cooperation with several industrial partners, for battery lifetime optimization by means of an energy aware usage of system communication and computation resources. We distinguish between techniques aiming at minimizing energy dissipation of the wireless network interface and those aiming at saving energy while targeting the whole system, for those cases where a decrease of network adapter energy might be erased by an increase of system energy. Measurements on real experimental settings provided energy savings ranging from 20 to 70% with respect to the use of stateof-the-art MAC layer power management techniques available inmost commercial wireless network adapters
Network-on-Chip Design for Gigascale Systems-on-Chip
No full textThe Industrial Information Technology Handbook focuses on existing and emerging industrial applications of IT, and on evolving trends that are driven by the needs of companies and by industry-led consortia and organizations. Emphasizing fast growing areas that have major impacts on industrial automation and enterprise integration, the Handbook covers topics such as industrial communication technology, sensors, and embedded systems. The book is organized into two parts. Part 1 presents material covering new and quickly evolving aspects of IT. Part 2 introduces cutting-edge areas of industrial IT. The Handbook presents material in the form of tutorials, surveys, and technology overviews, combining fundamentals and advanced issues, with articles grouped into sections for a cohesive and comprehensive presentation. The text contains 112 contributed reports by industry experts from government, companies at the forefront of development, and some of the most renowned academic and research institutions worldwide. Several of the reports on recent developments, actual deployments, and trends cover subject matter presented to the public for the first time. Chapter 95 covers the basic principles and guidelines for network-on-chip design. First, the motivation for the design paradigm shift toward NoCs is given. Second, architecture design principles are illustrated with reference to real prototypes. Finally, the challenging issue of heterogeneous NoC design is addressed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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