Search results for "Noise suppression"

showing 3 items of 3 documents

Hot-electron noise suppression in n-Si via the Hall effect

2008

We investigate how hot-electron fluctuations in n-type Si are affected by the presence of an intense (static) magnetic field in a Hall geometry. By using the Monte Carlo method, we find that the known Hall-effect-induced redistribution of electrons among valleys can suppress electron fluctuations with a simultaneous enhancement of the drift velocity. We investigate how hot-electron fluctuations in n-type Si are affected by the presence of an intense (static) magnetic field in a Hall geometry. By using the Monte Carlo method, we find that the known Hall-effect-induced redistribution of electrons among valleys can suppress electron fluctuations with a simultaneous enhancement of the drift vel…

Statistics and ProbabilityCondensed Matter - Materials ScienceQuantum PhysicsDrift velocityNoise suppressionMaterials scienceCondensed matter physicsMonte Carlo methodMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesStatistical and Nonlinear PhysicsElectronCondensed Matter::Mesoscopic Systems and Quantum Hall EffectMagnetic fieldhot electrons Si noise Hall effectHall effectRedistribution (chemistry)Statistics Probability and UncertaintyQuantum Physics (quant-ph)Hot electron
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Length of endodontic files measured in digital radiographs with and without noise-suppression filters: an ex-vivo study

2011

The aim of this study is to evaluate if theoretically possible edge shifts induced by noise-suppression filters potentially occur on objects found in digital radiographs. Most manufacturers carry out noise-suppression filtering of their images before they are displayed to the user. It is not usually possible for the user to disrupt the function of the filters. The use of these filters can lead to deletion of small image structures.K-files (ISO size 06, 08, 10 and 15) were placed in the root canals of 6 human teeth located in cadaver jaw segments. File tip positions were measured on original and filtered digital images by three observers. The file position was marked on each filtered image a…

Dental InstrumentsRadiographyDentistryMandibleStandard deviationDigital imageCadaverEndodontic filesCadaverHumansRadiology Nuclear Medicine and imagingComputer visionGeneral DentistryMathematicsNoise suppressionPixelbusiness.industryResearchGeneral MedicineEquipment DesignRadiography Dental DigitalImage enhancementOtorhinolaryngologySubtraction TechniqueArtificial intelligenceDental Pulp CavitybusinessArtifactsFiltrationRoot Canal Preparation
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Noncritical quadrature squeezing through spontaneous polarization symmetry breaking

2010

We discuss the possibility of generating noncritical quadrature squeezing by spontaneous polarization symmetry breaking. We first consider Type II frequency-degenerate optical parametric oscillators but discard them for a number of reasons. Then we propose a four-wave-mixing cavity, in which the polarization of the output mode is always linear but has an arbitrary orientation. We show that in such a cavity, complete noise suppression in a quadrature of the output field occurs, irrespective of the parameter values.

Spontaneous polarizationPhysicsQuantum PhysicsNoise suppressionQuantum mechanicsFOS: Physical sciencesPhysics::OpticsSymmetry breakingQuantum Physics (quant-ph)Polarization (waves)Atomic and Molecular Physics and OpticsParametric statistics
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