Search results for "distributed source"

showing 2 items of 2 documents

Distributed analysis of simultaneous EEG-fMRI time-series: modeling and interpretation issues

2009

Functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) represent brain activity in terms of a reliable anatomical localization and a detailed temporal evolution of neural signals. Simultaneous EEG-fMRI recordings offer the possibility to greatly enrich the significance and the interpretation of the single modality results because the same neural processes are observed from the same brain at the same time. Nonetheless, the different physical nature of the measured signals by the two techniques renders the coupling not always straightforward, especially in cognitive experiments where spatially localized and distributed effects coexist and evolve temporally at different …

MaleDefault-modeBrain activity and meditationComputer scienceinstrumentation/methodsElectroencephalographycomputer.software_genreSynchronizationComputer-AssistedModelsEEGEvoked PotentialsDefault mode networkParametric statisticsVisual CortexBrain Mappingmedicine.diagnostic_testfMRISettore MED/37 - NeuroradiologiaElectroencephalographyMagnetic Resonance ImagingPattern Recognition VisualNeurologicalVisualAdultModels NeurologicalBiomedical EngineeringBiophysicsPattern RecognitionMachine learningEEG-fMRISensitivity and SpecificitymethodsImage Interpretation Computer-AssistedmedicineHumansRadiology Nuclear Medicine and imagingComputer SimulationImage Interpretationbusiness.industryWorking memoryWorking memoryReproducibility of ResultsPattern recognitionAdult Brain Mapping; methods Computer Simulation Electroencephalography; methods Evoked Potentials; Visual; physiology Humans Image Interpretation; Computer-Assisted; methods Magnetic Resonance Imaging; instrumentation/methods Male Models; Neurological Pattern Recognition; physiology Reproducibility of Results Sensitivity and Specificity Visual Cortex; physiologyDistributed source modelingphysiologyEvoked Potentials VisualArtificial intelligencebusinessFunctional magnetic resonance imagingcomputer
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A time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal plane

2019

Abstract Fast-timing measurements at the focal plane of a separator can suffer from poor timing resolution. This is due to the variations in time-of-flight (ToF) for photons travelling to a given detector, which arise from the changes in the implantation positions of the recoil nuclei emitting the γ rays of interest. In order to minimise these effects on timing measurements, a procedure is presented that improves fast-timing data by performing ToF corrections on an event-by-event basis. This method was used to correct data collected with an array of eight LaBr 3 detectors, which detected γ rays from spatially distributed 138Gd recoil-implants at the focal plane of the Recoil-Ion-Transport-U…

Nuclear and High Energy PhysicsPhotonGeneralised-centroid-difference methodtutkimuslaitteetspektrometritStandard deviation138GdRecoilgeneralised-centroid-difference methodDistributed sourceNuclear ExperimentNuclear-state lifetimesInstrumentationdetectorsPhysicsnuclear-state lifetimesta114Spectrometerfast-timingDetectorCentroidFast-timingLaBr3Computational physicsTime of flightCardinal pointdistributed sourceydinfysiikkaNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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