1,358,725 research outputs found
Adaptive Latency Insensitive Protocols
No full textLatency-insensitive design copes with excessive delays typical of global wires in current and future IC technologies. It achieves its goal via encapsulation of synchronous logic blocks in wrappers that communicate through a latency-insensitive protocol (LIP) and pipelined interconnects. Previously proposed solutions suffer from an excessive performance penalty in terms of throughput or from a lack of generality. This article presents an adaptive LIP that outperforms previous static implementations, as demonstrated by two relevant cases — a microprocessor and an MPEG encoder — whose components we made insensitive to the latencies of their interconnections through a newly developed wrapper. We also present an informal exposition of the theoretical basis of adaptive LIPs, as well as implementation detail
Endemic freshwater planarians of Sardinia: Redescription of Dugesia hepta (Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus
No full textStocchino, G. A., Corso, G., Manconi, R., Casu, S., Pala, M. (2005): Endemic freshwater planarians of Sardinia: Redescription of Dugesia hepta (Platyhelminthes, Tricladida) with a comparison of the Mediterranean species of the genus. Journal of Natural History 39 (22): 1947-1960, DOI: 10.1080/00222930500060025, URL: http://dx.doi.org/10.1080/0022293050006002
Issues in Implementing Latency Insensitive Protocols
No full textThe latency insensitive protocols (LIP), which are designed to improve the performance of systems-on-chip, were refined. The refined protocol was validated by using many proof-of-concept examples, that comprised of various combinations of feedforward and feedback topologies. All examples were successfully simulated using VHDL description of all blocks and an event-driven simulator. The results show that the protocol refinement allows precise calculations of important design parameters, like system throughput and transient length
Adaptive Latency Insensitive Protocols andElastic Circuits with Early Evaluation: A Comparative Analysis
No full textAbstractLatency Insensitive Protocols (LIP) and Elastic Circuits (EC) solve the same problem of rendering a design tolerant to additional latencies caused by wires or computational elements. They are performance-limited by a firing semantics that enforces coherency through a lazy evaluation rule: Computation is enabled if all inputs to a block are simultaneously available. Adaptive LIP's (ALIP) and EC with early evaluation (ECEE) increase the performance by relaxing the evaluation rule: Computation is enabled as soon as the subset of inputs needed at a given time is available. Their difference in terms of implementation and behavior in selected cases justifies the need for the comparative analysis reported in this paper. Results have been obtained through simple examples, a single representative case-study already used in the context of both LIP's and EC and through extensive simulations over a suite of benchmarks
FLOW: Implementation and Formal Analysis of a Framework for Parallel and Distributed Computing
No full textThis is a (not so short) summary of the MSc thesis defended by Alces
te Scalas and Giovanni Casu on April 2011. The complete work (which is written i
n Italian) can be downloaded as CRS4 Technical Report 11/14. The first part of t
he thesis (from page 3) describes our work during the RTSim project at CRS4, con
sisting in the development of an Erlang-based framework for parallel and distrib
uted computing (called FLOW) to be used for combined cycle power plant (CCPP) si
mulation. A relevant part of the contents appeared in the paper we presented at
the ACM ICFP 2008 Erlang Workshop. The second part (from page 10) presents a for
mal model for FLOW-based applications. The model is analysed and translated into
two different process algebras (one based on Pi-calculus, and another on the Li
nda coordination language); it is finally verified that these translations are `
`correct'', in the sense that they preserve the communication topology of proces
ses
Lavorare con le persone. Note a margine dell’esperienza: Forlì, Prato, Cagliari
No full textIl saggio indaga la relazione tra planner e contesto socio-territoriale, analizzando tre concrete esperienze di riqualificazione urbana in aree marginali e perifericheThe essay investigates the relationships between planner and social context, analysing three real experiences of urban rehabilitation in marginal area
"EKOROLEV" - DIMENSIONS IN URBAN AND COUNTRYSIDE PLANNING OF SUSTAINABLE DEVELOPMENT
No full textTo provide sustainable development (and not just growth) of urban areas, experts and regional authorities should jointly follow the principles of Sustainable Development (SD) that were originally proposed by the fundamental work Limits to Growth (Meadows et al., 1972) which described global, national and inter-regional strategies, plans and dynamics for urban development. As a result of SD, a new (more sustainable) type of urban strategy, ecopolis strategy, can be proposed.We will present an example of such an urban ecopolis strategy. It was elaborated for Moscow Region city Korolev, combining architecture, planning and design, ecosystem restoration, evaluation of risks and calculation of resources required for strategy implementation. The ecopolis strategy for Korolev city ("E Korolev project") was produced over several years by a special task force - a joint Italian and Russian team along with the city council of Korolev (Kavtaradze, Casu, 2011) - which concentrated the project around key elements of ecopolis strategy, as described in the article
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