Search results for "local [action]"

showing 10 items of 583 documents

An automatic cooperative retransmission MAC protocol in Wireless Local Area Networks

2009

Existing solutions for cooperation in wireless networks either require simultaneous transmission of source and relay nodes or impose major modifications to original MAC protocols. In this paper, a new efficient retransmission MAC protocol is proposed for IEEE 802.11 based cooperation communications, with minimum modifications to the DCF scheme. Throughput and access delay performance of the proposed protocols is analyzed in error-prone and highly temporally correlated channels. Numerical results show that significant benefits can be achieved with our cooperative protocol, compared with the legacy schemes.

Wireless networkComputer sciencebusiness.industryRetransmissionDistributed computingComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSLocal area networkThroughputlaw.inventionIEEE 802.11Transmission (telecommunications)RelaylawWirelessbusinessComputer network2009 European Wireless Conference
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Enabling Cognitive-Radio Paradigm on Commercial Off-The-Shelf 802.11 Hardware

2013

Cognitive Radio paradigm (CR) has been recognized as key enabler for next generation wireless networking: the pos- sibility to access the limited radio spectrum in an oppor- tunistic manner allows secondary users to boost their trans- mission performance without interfering with existing pri- mary networks. Full testing and experimenting with this paradigm, however, is still a tough task, given either the i) limited capabilities above the PHY layer of cheap SDR so- lutions, or the ii) heavy investment required for setting up multi-node testbeds powered by FPGAs. In this demo we show how we leveraged our Wireless MAC Processor archi- tecture to tackle the two issues at the same time, providi…

Wireless networkbusiness.industryComputer scienceSettore ING-INF/03 - TelecomunicazioniComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSPhysical layerLocal area networkMicroarchitectureCognitive radioEmbedded systemCognitive radio Wireless MAC Processor ControlWirelessbusinessCommercial off-the-shelfCommunication channelComputer network
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1<sup>st</sup> International Workshop on Sustainable Internet and Internet for Sustainability (SustaInet 2011

2011

We are pleased to present the proceedings of the First International Workshop on Sustainable Internet and Internet for Sustainability (SustaInet 2011), held in conjunction with WoWMoM 2011.

World Wide WebSmart gridbusiness.industryComputer scienceInternet privacySustainabilityLocal area networkThe InternetCloud computingInternet of ThingsbusinessConjunction (grammar)2011 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks
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On local optima in minimum time control of the restricted three-body problem

2016

International audience; The structure of local minima for time minimization in the controlled three-body problem is studied. Several homotopies are systematically used to unfold the structure of these local minimizers, and the resulting singularity of the path associated with the value function is analyzed numerically.

[ MATH.MATH-OC ] Mathematics [math]/Optimization and Control [math.OC]0209 industrial biotechnologyMathematical optimizationHomotopyCircular restricted three body problemShooting Homotopy02 engineering and technologyMSC : 70F07 (49K15 49N90 58K99)Optimal controlThree-body problem01 natural sciencesOptimal controlMaxima and minimaSwallowtail singularity020901 industrial engineering & automationSingularityLocal optimumBellman equation0103 physical sciencesPath (graph theory)Applied mathematics[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]010303 astronomy & astrophysicsMathematics
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Constrained differential inclusions with nonlocal initial conditions

2017

International audience; We show existence for the perturbed sweeping process with nonlocal initial conditions under very general hypotheses. Periodic, anti-periodic, mean value and multipoints conditions are included in this study. We give abstract results for differential inclusions with nonlocal initial conditions through bounding functions and tangential conditions. Some applications to differential complementarity systems and to vector hysteresis are given.

[ MATH.MATH-OC ] Mathematics [math]/Optimization and Control [math.OC]MSC: 34A60 49J52 34G25 49J53 34B10Periodic solutionsNonlocal Cauchy problemDifferential inclusions[MATH.MATH-OC] Mathematics [math]/Optimization and Control [math.OC][MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]Sweeping processesNormal coneBounding functions
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Administrative Capacity as a Constraint to Fiscal Decentralization. The Case of Romania and Poland

2020

This paper considers the problem of administrative capacity as one of the main requirements that the accession countries seeking EU membership had to meet, and as a prerequisite to the decentralization of their public sectors and public finances. The selected decentralization problems are analyzed using the cases of two countries: Romania and Poland. The results of a theoretical and practical evaluation of administrative capacity as a likely obstacle to fiscal decentralization are presented taking account of the different levels of decentralization in Poland and Romania. A comparative analysis of Romania and Poland shows that administrative capacity can be a constraint for fiscal decentrali…

administracja publiczna0211 other engineering and technologiesFinancial independencepodatki lokalne02 engineering and technologyDecentralizationAccessionSubsidiarityddc:330050602 political science & public administrationH77H70local selfgovernmentH71HB71-74Constraint (mathematics)021101 geological & geomatics engineeringfiscal decentralizationlocal taxesbusiness.industry05 social sciencesPublic sectorGeneral Medicinedecentralizacja fiskalnapublic administrationDevolution0506 political scienceEconomics as a scienceObstaclesamorząd terytorialnyEconomic systembusinessComparative Economic Research. Central and Eastern Europe
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A comparison of injection pain with articaine with adrenaline, prilocaine with phenylpressin and lidocaine with adrenaline

2008

Kutuk, Nukhet/0000-0001-6563-1899 WOS: 000259667200006 PubMed: 18587306 Objective: The objective of the present study was to investigate the pain on injection of articaine with adrenaline, prilocaine with phenylpressin, and lidocaine with adrenaline. Study Design: The study sample was comprised of 497 consecutively seen patients received 497 maxillary buccal infiltration injections or inferior alveolar block injections of 4% articaine with 1: 200.000 adrenaline, 3% prilocaine with 1.08mcg phenylpressin, or 2% lidocaine with 1: 100.000 adrenaline. Immediately after the injection, patients were asked to rate their injection pain on a six-point scale. Results: There were no significant differe…

articaineinferior alveolar block injectionlidocaineUNESCO::CIENCIAS MÉDICASSumer M. Misir F. Celebi N. Muglali M. -A comparison of injection pain with articaine with adrenaline prilocaine with phenylpressin and lidocaine with adrenaline- MEDICINA ORAL PATOLOGIA ORAL Y CIRUGIA BUCAL cilt.13 2008maxillary local anesthesiainjection painprilocaine:CIENCIAS MÉDICAS [UNESCO]
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Dynamic MAC Parameters Configuration for Performance Optimization in 802.11e Networks

2006

Quality of service support in wireless LAN is a theme of current interest. Several solutions have been proposed in literature in order to protect time-sensitive traffic from best-effort traffic. According to the EDCA proposal, which is a completely distributed solution, the service differentiation is provided by giving probabilistically higher number of channel accesses to stations involved in real-time applications. To this purpose, the MAC parameter settings of each contending stations can be tuned dynamically. In this paper, we face the problem of tuning the EDCA MAC parameters in common scenarios in which a given number of low-rate delay-sensitive traffic flows share the channel with so…

backoff algorithmWireless local area networks (WLAN)Throughput
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Remarks on IEEE 802.11 DCF Performance Evaluation, IEEE Communication Letters, Vol. 9, Issue 8, Aug 2005 pp:765 - 767

2005

This letter presents a new approach to evaluate the throughput/delay performance of the 802.11 Distributed Coordination Function (DCF). Our approach relies on elementary conditional probability arguments rather than bidimensional Markov chains (as proposed in previous models), and can be easily extended to account for backoff operation more general than DCF's one

backoff algorithmWireless local area networks (WLAN)Throughput
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On the accuracy of some common modeling assumptions for EDCA analysis

2005

Several models have been discussed in literature in order to evaluate the performance of the EDCA differentiation mechanisms. Despite of the exponential back off rules, usually the EDCA protocol has been modeled as a persistent slotted access protocol, and summarized into a set of access probabilities. These models often show a very different complexity and accuracy, according to the basis assumptions. In this paper, we propose a new modeling approach for EDCA, in which the medium access is described in terms of backoff counter comparisons, contention by contention, and no restrictive hypothesis is considered. Through our model, we verify the applicability of the most common protocol simpli…

backoff algorithmWireless local area networks (WLAN)Throughput
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