Search results for "Critical distance"

showing 3 items of 3 documents

Auditory distance perception in an acoustic pipe

2008

In a study of auditory distance perception, we investigated the effects of exaggeration the acoustic cue of reverberation where the intensity of sound did not vary noticeably. The set of stimuli was obtained by moving a sound source inside a 10.2-m long pipe having a 0.3-m diameter. Twelve subjects were asked to listen to a speech sound while keeping their head inside the pipe and then to estimate the egocentric distance from the sound source using a magnitude production procedure. The procedure was repeated eighteen times using six different positions of the sound source. Results show that the point at which perceived distance equals physical distance is located approximately 3.5 m away fr…

Auditory displayReverberationRange (music)Critical distanceSound and Music ComputingGeneral Computer SciencePerformanceSpeech recognitionmedia_common.quotation_subjectExperimental and Cognitive PsychologySound and Music Computing; Auditory display; Distance perceptionTheoretical Computer ScienceLoudnessPerceptionExperimentationSound (geography)media_commonMathematicsExperimentation; Measurement; Performance; Acoustic pipe; Auditory display; Distance perceptionMeasurementgeographygeography.geographical_feature_categorySettore INF/01 - InformaticaAuditory displaySound intensityAcoustic pipeAcoustic pipe; auditory display; distance perceptionDistance perceptionACM Transactions on Applied Perception
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The kinetics of defect accumulation under irradiation: many-particle effects

1993

The kinetics of Frenkel defect accumulation under permanent particle source (irradiation) is discussed with special emphasis on many-particle effects. Defect accumulation is restricted by their diffusion and annihilation, A + B → 0, if the relative distance is less than the critical distance r0. A novel formalism of many-point particle densities based on Kirkwood's superposition approximation is developed to take into account aggregation of similar defects (A−A, B−B). The dependence of the saturation concentration after a prolonged irradiation upon spatial dimension ( = 1, 2, 3), defect mobility and the initial correlation within geminate pairs is analyzed. It is shown that the defect conce…

Particle systemAnnihilationCritical distanceMaterials scienceCondensed matter physicsKröger–Vink notationMany-body theoryKineticsFrenkel defectIrradiationCondensed Matter PhysicsMathematical PhysicsAtomic and Molecular Physics and OpticsPhysica Scripta
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Dragging a Polymer Chain into a Nanotube and Subsequent Release

2008

We present a scaling theory and Monte Carlo (MC) simulation results for a flexible polymer chain slowly dragged by one end into a nanotube. We also describe the situation when the completely confined chain is released and gradually leaves the tube. MC simulations were performed for a self-avoiding lattice model with a biased chain growth algorithm, the pruned-enriched Rosenbluth method. The nanotube is a long channel opened at one end and its diameter $D$ is much smaller than the size of the polymer coil in solution. We analyze the following characteristics as functions of the chain end position $x$ inside the tube: the free energy of confinement, the average end-to-end distance, the averag…

chemistry.chemical_classificationLattice model (finance)NanotubeCritical distanceMaterials scienceStatistical Mechanics (cond-mat.stat-mech)Polymers and PlasticsOrganic ChemistryMonte Carlo methodFOS: Physical sciencesPolymerCondensed Matter - Soft Condensed MatterMolecular physicsInorganic ChemistrychemistryChain (algebraic topology)Phase (matter)Materials ChemistrySoft Condensed Matter (cond-mat.soft)Tube (fluid conveyance)Condensed Matter - Statistical MechanicsMacromolecules
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