Search results for "Array data type"

showing 5 items of 5 documents

Spatiotemporal Neurodynamics Underlying Internally and Externally Driven Temporal Prediction: A High Spatial Resolution ERP Study

2015

Abstract Temporal prediction (TP) is a flexible and dynamic cognitive ability. Depending on the internal or external nature of information exploited to generate TP, distinct cognitive and brain mechanisms are engaged with the same final goal of reducing uncertainty about the future. In this study, we investigated the specific brain mechanisms involved in internally and externally driven TP. To this end, we employed an experimental paradigm purposely designed to elicit and compare externally and internally driven TP and a combined approach based on the application of a distributed source reconstruction modeling on a high spatial resolution electrophysiological data array. Specific spatiotemp…

AdultCognitive NeuroscienceArray data typeElectroencephalographyCue050105 experimental psychologyYoung Adult03 medical and health sciences0302 clinical medicinemedicineHumans0501 psychology and cognitive sciencesEvoked PotentialsImage resolutionCerebral CortexCommunicationSettore M-PSI/02 - Psicobiologia E Psicologia FisiologicaArtificial neural networkmedicine.diagnostic_testbusiness.industryFunctional Neuroimaging05 social sciencesElectroencephalographyCognitionAnticipation PsychologicalAnticipationCombined approachContingent negative variationTime PerceptionCuesEvoked PotentialPsychologybusinessNeurosciencePsychomotor Performance030217 neurology & neurosurgeryHumanJournal of Cognitive Neuroscience
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An optimized mass storage FFT for vector computers

1995

Abstract The performance of a segmented FFT algorithm which allows the out-of-core computation of the Fourier transform of a very large mass storage data array is presented. The code is particularly optimized for vector computers. Tests performed mainly on a CONVEX C210 vector computer showed that, for very long transforms, tuning of the main parameters involved leads to computation speed and global efficiency better than for FFTs performed in-core. The use of tunable parameters allows optimization of the algorithm on machines with different configurations.

Computer Networks and Communicationsbusiness.industryComputer scienceComputationFast Fourier transformPrime-factor FFT algorithmArray data typeComputer Graphics and Computer-Aided DesignTheoretical Computer ScienceVector processorsymbols.namesakeFourier transformSplit-radix FFT algorithmArtificial IntelligenceHardware and ArchitectureComputer data storagesymbolsbusinessAlgorithmSoftwareParallel Computing
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A MEMS array-type Mirau interferometer for swept-source OCT imaging with applications in dermatology

2017

In the frame the European project VIAMOS (www.viamos.eu) we developed a microsystem based on Mirau interferometry and applied for optical coherence tomography (OCT) imaging of living tissues. The objective is to benefit from advanced MOEMS technologies, enabling a new generation of miniature and low-cost instruments using the concept of the swept-source OCT (SS-OCT) microsystem based on spectrally tuned Mirau interferometry, into which a doublet of microlens matrices (4×4) and a wafer of movable reference mirrors are included, building the active Mirau interferometer.

Microelectromechanical systemsMicrolensMaterials sciencemedicine.diagnostic_testbusiness.industryMirau interferometerArray data type02 engineering and technology021001 nanoscience & nanotechnology01 natural sciences010309 opticsInterferometryOpticsOptical coherence tomographyMicrosystem0103 physical sciencesmedicineOptoelectronics0210 nano-technologybusiness2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)
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A Multisite-Multipollutant Air Quality Index

2013

Abstract In this paper, starting from a multivariate spatio-temporal array, containing air pollution data collected for the main pollutants at different monitoring sites over a 1-year period, a new approach is proposed to get a Multipollutant-Multisite Air Quality Index (AQI) time series. A two steps aggregation, related to space and to pollutants, is considered. For the first aggregation (spatial synthesis) a PCA is performed on data array opportunely rearranged, while the index I2, proposed in Ruggieri and Plaia (2011) , is used for the second aggregation (pollutant synthesis), obtaining the new index I 2 MS . Daily data of four air pollutants from the city of Palermo (Italy) are analyzed…

PollutantAtmospheric ScienceMultivariate statisticsIndex (economics)Environmental engineeringAir pollutionAir Quality Index Three-way arrayArray data typemedicine.disease_causeAir pollutantsStatisticsmedicineEnvironmental scienceSettore SECS-S/01 - StatisticaAir quality indexGeneral Environmental ScienceAtmospheric Environment
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Quasi-interpolating and Smoothing Local Splines

2015

In this chapter, local quasi-interpolating and smoothing splines are described. Although approximation properties of local spline are similar to properties of the global interpolating and smoothing splines, their design does not require the IIR filtering of the whole data array. The computation of a local spline value at some point utilizes only a few adjacent grid samples. Therefore, local splines can be used for real-time processing of signals and for the design of FIR filter banks generating wavelets and wavelet frames (Chaps. 12 and 14). In the chapter, local splines of different orders are designed and their approximation properties are established which are compared with the propertie…

Spline (mathematics)Smoothing splineComputer Science::GraphicsWaveletFinite impulse responseComputer scienceApproximation propertyComputationApplied mathematicsArray data typeSmoothingMathematics::Numerical Analysis
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