Search results for "LESS"

showing 10 items of 2452 documents

Remote Patient Monitoring Within a Future 5G Infrastructure

2010

Published version of an article from the journal: Wireless Personal Communications. The original publication is available at Spingerlink. http://dx.doi.org/10.1007/s11277-010-0078-5 Systems of wearable or implantable medical devices (IMD), sensor systems for monitoring and transmitting physiological recorded signals, will in future health care services be used for purposes of remote monitoring. Today, there exist several constraints, probably preventing the adoption of such services in clinical routine work. Within a future 5G infrastructure, new possibilities will be available due to improved addressing solutions and extended security services in addition to higher bandwidth in the wireles…

TelemedicineRemote patient monitoringbusiness.industryComputer scienceWearable computerVDP::Technology: 500::Information and communication technology: 550Computer Science ApplicationsHealth careBandwidth (computing)WirelessMobile telephonyElectrical and Electronic EngineeringbusinessTelecommunications
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SMART CULTURAL HERITAGE AND SUSTAINABLE URBAN DESIGN EXPERIMENTAL DISTRICTS IN SICILY AND IN GREECE

2014

The design is a creative process for the production of objects , projects and services that are used to meet any need. In architecture and city planning in the design process is designed especially to meet the needs of living. Sustainable urban design is in fact a creative process for the implementation of sustainable practices. Adding up the benefits for all sectors that deal with sustainability indices , it can be argued that the reduction of the environmental impact , better use of the cultural and environmental resources and an improved quality of life for the inhabitants are the main advantages to build sustainable urban development. There are various urban problems in certain cities o…

The XVIII International Interdisciplinary Conference The usefulness of the useless in the landscape-cultural mosaic: liveability typicality bio-diversitySettore ICAR/12 - Tecnologia Dell'Architettura
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Non-Linear Hysteretic Instability in Rotating Machinery

2013

The destabilizing influence of the shaft hysteresis on the supercritical whirl of rotating machines can be efficiently counterbalanced by proper external dissipative sources in the supports and/or anisotropic suspension systems. The hysteretic effect may be treated either by dry or viscous models obtaining different but somehow similar results in the hypothesis of small dissipation levels. Thus the linear viscous assumption is often accepted as a crude approximation for a straightforward analysis of the whirling instability. Nevertheless the internal friction should be regarded most likely as non-linear and could be approximated for example by Coulombian models taking thus into account also the releasing effect of some shrink-fit coupling present in the mechanical assembly.
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The laparoscopic approach to Acute Mesenteric Ischemia is today unclear and less debated (AMI). There are in fact no clinical evidences on this parti…

2016

The laparoscopic approach to Acute Mesenteric Ischemia is today unclear and less debated (AMI). There are in fact no clinical evidences on this particular focus and only few articles can be found in several databases (pubmed, cochrane library, etc.), and the problem concerns both diagnostic and therapeutic utilization of the procedure. These considerations were already taken into account in 2012 EAES guidelines where the Grade of Recommendation (GoR) of laparoscopy in AMI was low in both diagnostic and therapeutic aspects. According to the new Oxford Classification [1], the use of laparoscopy in patients with suspicious or diagnosed AMI presents a weak GoR.

The laparoscopic approach to Acute Mesenteric Ischemia is today unclear and less debated (AMI). There are in fact no clinical evidences on this particular focus and only few articles can be found in several databases (pubmed cochrane library etc.) and the problem concerns both diagnostic and therapeutic utilization of the procedure. These considerations were already taken into account in 2012 EAES guidelines where the Grade of Recommendation (GoR) of laparoscopy in AMI was low in both diagnostic and therapeutic aspects. According to the new Oxford Classification [1] the use of laparoscopy in patients with suspicious or diagnosed AMI presents a weak GoR.
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Canopy Architecture Appraisal by Fractal Dimension of 'Flordastar' Peach Trees Grafted onto Different Rootstocks

2007

The objective of this research was to evaluate the modification of canopy architecture of ''Flordastar'' peach (Prunus persica L. Batsch) grafted onto rootstocks with different vigour, by the use of fractal dimension (D). The hypothesis was that different vigour rootstocks are able to modify the complexity of the branching pattern and that this effect can be assessed by a geometric parameter such as the fractal dimension (D) of the 2D projection of tree branching structure. The observations were carried out in a four-year-old experimental orchard of cv. ''Flordastar'' peach trees grafted onto Ishtara, Barrier, GF677 and MrS 2/5 rootstocks. On digital pictures of leafless, dormant peach tree…

The objective of this research was to evaluate the modification of canopy architecture of ''Flordastar'' peach (Prunus persica L. Batsch) grafted onto rootstocks with different vigour by the use of fractal dimension (D). The hypothesis was that different vigour rootstocks are able to modify the complexity of the branching pattern and that this effect can be assessed by a geometric parameter such as the fractal dimension (D) of the 2D projection of tree branching structure. The observations were carried out in a four-year-old experimental orchard of cv. ''Flordastar'' peach trees grafted onto Ishtara Barrier GF677 and MrS 2/5 rootstocks. On digital pictures of leafless dormant peach trees the tree skeleton was manually depicted by an image analysis software to measure total length and angles of insertion of branches. Bitmaps of the skeleton were then subjected to a specific software (FDCALC) able to calculate D by the "box counting" method. To account for the error introduced by analyzing a three dimensional structure with its 2D projection measurements were done on two images per tree taken from two different viewing angles. Results are shown in relation to tree vigour of the scion/stock combination. Fractal dimension was related to the vigour ranking of the graft combinations tested. In particular vigorous scion/stock combinations showed the highest D.HorticultureCanopy architectureHorticultureRootstockFractal dimensionMathematics
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Distributed Data Clustering via Opinion Dynamics

2015

We provide a distributed method to partition a large set of data in clusters, characterized by small in-group and large out-group distances. We assume a wireless sensors network in which each sensor is given a large set of data and the objective is to provide a way to group the sensors in homogeneous clusters by information type. In previous literature, the desired number of clusters must be specified a priori by the user. In our approach, the clusters are constrained to have centroids with a distance at least ε between them and the number of desired clusters is not specified. Although traditional algorithms fail to solve the problem with this constraint, it can help obtain a better cluste…

Theoretical computer scienceArticle SubjectComputer Networks and Communicationsbusiness.industryComputer scienceGeneral EngineeringConstrained clusteringPartition (database)lcsh:QA75.5-76.95NETWORKSDetermining the number of clusters in a data setConsensusSettore ING-INF/04 - AutomaticaCONSENSUS PROBLEMSWirelesslcsh:Electronic computers. Computer sciencebusinessCluster analysis
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Challenging aspects in Consensus protocols for networks

2008

Results on consensus protocols for networks are presented. The basic tools and the main contribution available in the literature are considered, together with some of the related challenging aspects: estimation in networks and how to deal with disturbances is considered. Motivated by applications to sensor, peer-to- peer, and ad hoc networks, many papers have considered the problem of estimation in a consensus fashion. Here, the unknown but bounded (UBB) noise affecting the network is addressed in details. Because of the presence of UBB disturbances convergence to equilibria with all equal components is, in general, not possible. The solution of the epsiv-consensus problem, where the states…

Theoretical computer scienceAutomatic controlConsensus problemsWireless ad hoc networkStochastic processEstimation theoryComputer scienceDistributed computingMulti-agent systemConsensus problems; Consensus protocolsConsensus protocolsBounded functionConvergence (routing)Wireless sensor network
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On parsing optimality for dictionary-based text compression—the Zip case

2013

Dictionary-based compression schemes are the most commonly used data compression schemes since they appeared in the foundational paper of Ziv and Lempel in 1977, and generally referred to as LZ77. Their work is the base of Zip, gZip, 7-Zip and many other compression software utilities. Some of these compression schemes use variants of the greedy approach to parse the text into dictionary phrases; others have left the greedy approach to improve the compression ratio. Recently, two bit-optimal parsing algorithms have been presented filling the gap between theory and best practice. We present a survey on the parsing problem for dictionary-based text compression, identifying noticeable results …

Theoretical computer scienceComputer scienceData_CODINGANDINFORMATIONTHEORYTop-down parsingcomputer.software_genreTheoretical Computer ScienceParsing optimalityCompression (functional analysis)Discrete Mathematics and CombinatoricsLossless compressionParsingLZ77 algorithmSettore INF/01 - InformaticaDeflate algorithmbusiness.industryDictionary-based text compressionComputational Theory and MathematicsData compressionDEFLATECompression ratioArtificial intelligencebusinesscomputerNatural language processingBottom-up parsingData compressionJournal of Discrete Algorithms
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Dictionary-symbolwise flexible parsing

2012

AbstractLinear-time optimal parsing algorithms are rare in the dictionary-based branch of the data compression theory. A recent result is the Flexible Parsing algorithm of Matias and Sahinalp (1999) that works when the dictionary is prefix closed and the encoding of dictionary pointers has a constant cost. We present the Dictionary-Symbolwise Flexible Parsing algorithm that is optimal for prefix-closed dictionaries and any symbolwise compressor under some natural hypothesis. In the case of LZ78-like algorithms with variable costs and any, linear as usual, symbolwise compressor we show how to implement our parsing algorithm in linear time. In the case of LZ77-like dictionaries and any symbol…

Theoretical computer scienceComputer science[INFO.INFO-DS]Computer Science [cs]/Data Structures and Algorithms [cs.DS][INFO.INFO-DS] Computer Science [cs]/Data Structures and Algorithms [cs.DS]Data_CODINGANDINFORMATIONTHEORY0102 computer and information sciences02 engineering and technologycomputer.software_genre01 natural sciencesDirected acyclic graphTheoretical Computer ScienceConstant (computer programming)020204 information systemsEncoding (memory)Optimal parsing0202 electrical engineering electronic engineering information engineeringDiscrete Mathematics and CombinatoricsStringologySymbolwise text compressionTime complexityLossless compressionParsingSettore INF/01 - InformaticaDictionary-based compressionOptimal Parsing Lossless Data Compression DAGDirected acyclic graphPrefixComputational Theory and MathematicsText compression010201 computation theory & mathematicsAlgorithmcomputerBottom-up parsingData compressionJournal of Discrete Algorithms
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Statistical analysis of RaptorQ failure probability applied to a data recovery software

2014

In this work, we have implemented a data recovery software integrating the most recent rateless codes, i.e., RaptorQ codes. Thanks to the above-mentioned software, it is possible to recover data loss occurring on several kinds of network conditions. We have performed a statistical analysis of failure probabilities at several configurations of RaptorQ parameters. We have found a good agreement with the theoretical values of a random linear fountain code over Galois Field GF(256). Moreover, we have shown that the probability of having a certain number of failed decoded source blocks - when sending a fixed size file - follows a Poisson distribution.

Theoretical computer scienceRaptorQ codeComputer sciencebusiness.industrySettore ING-INF/03 - TelecomunicazioniFailure probabilitySettore ING-INF/01 - ElettronicaReliability engineeringData recoverySoftwarefailure probabilitystatistical analysiStatistical analysisrateless codebusiness
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