Search results for "Response time"

showing 10 items of 37 documents

Nonlinear repolarization dynamics in optical fibers: transient polarization attraction

2011

International audience; In this work, we present a theoretical and experimental study of the response of a lossless polarizer to a signal beam with a time-varying state of polarization (SOP). By lossless polarizer, we mean a nonlinear conservative medium (e.g., an optical fiber) that is counterpumped by an intense and fully polarized pump beam. Such a medium transforms input uniform or random distributions of the SOP of an intense signal beam into output distributions that are tightly localized around a well-defined SOP. We introduce and characterize an important parameter of a lossless polarizer--its response time. Whenever the fluctuations of the SOP of the input signal beam are slower th…

Optical fiberfibersexperimental studies; input polarization; input signal01 natural scienceslaw.invention010309 opticsOpticslaw0103 physical sciences010306 general physicsLossless compressionPhysics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]polarization[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]business.industryFiber optics and optical communications : Nonlinear opticsResponse timeStatistical and Nonlinear PhysicsPolarizerPolarization (waves)Atomic and Molecular Physics and OpticsNonlinear systemOCISSignal beambusinessPhotonic-crystal fiber
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Percentile Study of chi Distribution. Application to Response Time Data.

2020

As a continuation of our previous work, where a Maxwell&ndash

PercentileChi distributionResponse timesGeneral MathematicsProbability density functionMaxwell-Boltzmann distributionsymbols.namesakeContinuationStatisticsComputer Science (miscellaneous)Maxwell–Boltzmann distributionEngineering (miscellaneous)lcsh:MathematicsVariance (accounting)Ideal gas modelPhysics::Classical Physicslcsh:QA1-939Maxwell–Boltzmann distributionIdeal gasChi distributionDistribution (mathematics)FISICA APLICADAsymbolsχ distributionTemps Aspectes psicològicsMATEMATICA APLICADAideal gas modelresponse times
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Suppression of noise in FitzHugh–Nagumo model driven by a strong periodic signal

2005

Abstract The response time of a neuron in the presence of a strong periodic driving in the stochastic FitzHugh–Nagumo model is investigated. We analyze two cases: (i) the variable that corresponds to membrane potential is subjected to fluctuations, and (ii) the recovery variable associated with the refractory properties of a neuron is noisy. The influence of noise sources on the delay of the response of a neuron is analyzed. In both cases we observe a resonant activation-like phenomenon and suppression of noise: the negative effect of fluctuations on the process of spike generation is minimal near the resonance region. The phenomenon of noise enhanced stability is also observed in both case…

PhysicsPeriodic functionQuantitative Biology::Neurons and CognitionInitial phaseGeneral Physics and AstronomyResponse timeFitzHugh–Nagumo modelStatistical physicsStability (probability)Resonance (particle physics)Noise (electronics)Physics Letters A
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Demonstration of a Plasmonic MMI Switch in 10-Gb/s True Data Traffic Conditions

2012

International audience; We report the first experimental performance evaluation of a 75-mu m-long plasmonic multimode interference switch that is hetero-integrated on a silicon-on-insulator platform, operating with 10-Gb/s data signals. The switch exhibits a 2.9-mu s response time and 44.5% modulation depth, while the extinction ratio between the ports alters from 5.4 to -1.5 dB for 35-mW electrical (switching) power. Error-free performance was achieved.

PhysicsSilicon photonicsExtinction ratiobusiness.industryTRANSMISSIONCHIPOptical cross-connectSilicon on insulatorResponse time02 engineering and technology01 natural sciencesOptical switchAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsPower (physics)010309 opticsAmplitude modulation020210 optoelectronics & photonics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringOptoelectronicsElectrical and Electronic Engineeringbusiness
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Exact Response Time Analysis of Hierarchical Fixed-Priority Scheduling

2009

Hierarchical scheduling has recently been used to provide temporal isolation to embedded virtualised systems. Response time analysis is a common way to derive a schedulability test for these systems. This paper points out that response time analysis for hierarchical fixed-priority scheduling found in the literature is only exact for tasks of the highest priority domain. For the rest of the tasks is an upper bound. In our work, we provide the exact analysis and we compare it with previously published works.

Rate-monotonic schedulingTheoretical computer scienceComputer scienceServerResponse timeDynamic priority schedulingParallel computingTemporal isolationUpper and lower boundsFair-share schedulingScheduling (computing)2009 15th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications
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STUDIO DI UNA FRIZIONE MAGNETOREOLOGICA PER AUTOVEICOLI

2013

Dopo un’accurata ricerca bibliografica sui fluidi magnetoreologici, il loro comportamento ed impiego, si è passati alla progettazione di una frizione magnetoreologica per autoveicoli. Considerando le caratteristiche di coppia trasmessa e potenza, il dispositivo è stato dimensionato tenendo presente i vincoli di ingombro del veicolo preso in esame. Sottoponendo il dispositivo ad analisi magnetostatica agli elementi finiti, si è determinato l’andamento delle linee di flusso del campo magnetico nel meato di fluido e nelle zone di maggior interesse, calcolando la coppia teoricamente trasmessa dall’innesto.È stato anche eseguito il confronto delle prestazionifra una frizione MR ed una frizione t…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineAfter a thorough literature search on magnetorheological fluids their behavior and use it has gone to the design of a magnetorheological clutch for motor vehicles. Considering the characteristics of transmitted torque and power the device is dimensioned taking into account the constraints of space of the examined vehicle. Subjecting the device to magnetostatic finite element analysis it was determined the trend of the flow lines of the magnetic field in the gap of fluid and in areas of greater interest calculating the torque transmitted theoretically by the clutch. The performance comparison between a traditional clutch and a MR clutch was also performed pointing out that the MR clutch presents shorter response times with high energy savings. The study carried out shows that the device is well suited to a vehicle with automatic or robotic or otherwise with very short response times but requires a control system for the starting the vehicle.
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Active Plasmonics in True Data Traffic Applications: Thermo-Optic On/Off Gating Using a Silicon-Plasmonic Asymmetric MachZehnder Interferometer

2012

We present the first system-level demonstration of an active plasmonic device in 10-Gb/s data traffic conditions. An asymmetric silicon-plasmonic Mach-Zehnder interferometer with dielectric-loaded plasmonic waveguides serving as the electrically controlled arms, operates as thermo-optic ON/OFF gating element with 2.8-mu s response time and 10.8-mW power consumption. We present the first system-level demonstration of an active plasmonic device in 10-Gb/s data traffic conditions. An asymmetric silicon-plasmonic Mach-Zehnder interferometer with dielectric-loaded plasmonic waveguides serving as the electrically controlled arms, operates as thermo-optic ON/OFF gating element with 2.8-mu s respon…

Siliconchemistry.chemical_elementPhysics::Optics02 engineering and technologyGatingMach–Zehnder interferometerON-INSULATOR01 natural sciencesOptical switch010309 optics020210 optoelectronics & photonicsOptics0103 physical sciences0202 electrical engineering electronic engineering information engineeringSWITCHElectrical and Electronic EngineeringPlasmonPhysicsbusiness.industryResponse timeAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsInterferometrychemistryOptoelectronicsPhotonicsbusiness
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Performance evaluation of fuzzy-neural HTTP request distribution for Web clusters

2006

In this paper we present the performance evaluation of our fuzzy-neural HTTP request distribution algorithm called FNRD, which assigns each incoming request to the server in the Web cluster with the quickest expected response time. The fuzzy mechanism is used to estimate the expected response times. A neural-based feedback loop is used for real-time tuning of response time estimates. To evaluate the system, we have developed a detailed simulation and workload model using CSIM19 package. Our simulations show that FNRD can be more effective than its competitors.

Soft computingArtificial neural networkComputer sciencebusiness.industryResponse timeWorkloadFeedback loopcomputer.software_genreFuzzy logicServerThe InternetArtificial intelligenceData miningbusinesscomputer
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A heuristic method for estimating attribute importance by measuring choice time in a ranking task

2012

The evaluation of a product or service in terms of its attributes has been broadly studied in marketing, management and decision sciences. However, methods for finding important attributes have theoretical and practical limitations. The former are related to the selection of the most appropriate model; the latter are due to large number of variables that affect the specific experimental context. This study aims to present a new methodology that captures attribute preferences from a respondent and in particular, by using the choice time in a ranking task, it allows to indirectly obtain the importance weights for several tested attributes through a simple, fast and inexpensive procedure. More…

Statistics and ProbabilityEconomics and EconometricsService (systems architecture)HeuristicComputer scienceSettore SECS-S/02 - Statistica Per La Ricerca Sperimentale E TecnologicaVariable and attributeContext (language use)computer.software_genreTask (project management)RankingRespondentData miningStatistics Probability and UncertaintySettore SECS-S/01 - StatisticacomputerFinanceSelection (genetic algorithm)CHOICE TIME response time response latency attribute rating choice models
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Response time of a thermometer based on normal metal–insulator–superconductor (NIS) tunnel junctions

2003

Abstract We have measured the thermal response of a superconductor–normal metal–superconductor (SINIS) tunnel junction structure at substrate temperature ∼60 mK by directly heating the electron system in the normal metal island. In our structure, we find the response time is determined by the electron–phonon coupling in the electron temperature range 300– 600 mK . By using AC heating, the cut-off frequency caused by this response time has been measured, showing that SINIS structures operate as a thermometer up to a few MHz in this temperature range.

SuperconductivityMaterials scienceCondensed matter physicsResponse timeSubstrate (electronics)Atmospheric temperature rangeCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsTunnel junctionCondensed Matter::SuperconductivityThermometerThermalElectron temperaturePhysica E: Low-dimensional Systems and Nanostructures
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