0000000000952415

AUTHOR

Salvatore Ganci

showing 29 related works from this author

Physiological compatibility of wireless chargers for electric bicycles

2015

The Inductive Power Transfer represents a viable solution of wireless battery charging for all users of electric mobility. This method brings some benefits to the electric vehicles, being a convenient technique, compared to the conventional wire-based battery charging. Among the electric vehicles, the electric bicycles particularly fit with this innovative method of battery charging. Nevertheless, the physiological effects of the produced magnetic fields need to be taken into account. In this paper, the design of an Inductive Power Transfer system for E-bike wireless battery charging is presented and the measurements concerning the surrounding magnetic field are provided in order to validat…

Engineeringbusiness.industryElectrical engineeringwireless chargingelectric bicycleSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMagnetic fieldSettore ING-IND/31 - ElettrotecnicaHardware_GENERALCompatibility (mechanics)Maximum power transfer theoremWirelessphysiological compatibilityinductive power transferbusinesselectric mobility
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Unconditionally stable meshless integration of Maxwell's eqautions

2013

Settore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaMaxwell's equationsMeshless methodleapfrog ADI
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Un solutore meshfree per EEG e MEG

2014

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaMetodi meshfree MEG EEG
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Bio-electromagnetic Numerical Modeling for Health Diagnostics

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi Numericabioelectromagnetic fields bioelectromagnetism numerical methods medical imaging neuroimaging brain activity electroencephalography magnetoencephalography EEG MEG meshfree meshless method of fundamental solutionscampi bioelettromagnetici bioelettromagnetismo metodi numerici diagnostica per immagini attività cerebrale elettroencefalografia magnetoencefalografia metodo delle soluzioni fondamentali
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The Method of Fundamental Solutions in Solving Coupled Boundary Value Problems for M/EEG

2015

The estimation of neuronal activity in the human brain from electroencephalography (EEG) and magnetoencephalography (MEG) signals is a typical inverse problem whose solution pro- cess requires an accurate and fast forward solver. In this paper the method of fundamental solutions is, for the first time, proposed as a meshfree, boundary-type, and easy-to-implement alternative to the boundary element method (BEM) for solving the M/EEG forward problem. The solution of the forward problem is obtained by numerically solving a set of coupled boundary value problems for the three-dimensional Laplace equation. Numerical accuracy, convergence, and computational load are investigated. The proposed met…

Laplace's equationQuantitative Biology::Neurons and Cognitionmedicine.diagnostic_testApplied MathematicsPhysics::Medical PhysicsMathematical analysisMagnetoencephalographyInverse problemElectroencephalographySettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaComputational MathematicsConvergence (routing)medicineMethod of fundamental solutionsBoundary value problemkernel-based methods method of fundamental solutions EEG MEGBoundary element methodMathematicsSIAM Journal on Scientific Computing
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A numerical method for imaging of biological microstructures by VHF waves

2013

Imaging techniques give a fundamental support to medical diagnostics during the pathology discovery as well as for the characterization of biological structures. The imaging methods involve electromagnetic waves in a frequency range that spans from some Hz to GHz and over. Most of these methods involve scanning of wide human body areas even if only small areas need to be analyzed. In this paper, a numerical method to evaluate the shape of micro-structures for application in the medical field, with a very low invasiveness for the human body, is proposed. A flexible thin-wire antenna radiates the VHF waves and then, by measuring the spatial magnetic field distribution it is possible to recons…

FOS: Physical sciencesMedical Physics (physics.med-ph)Computational Physics (physics.comp-ph)Physics - Computational PhysicsPhysics - Medical Physics
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A novel numerical meshless approach for electric potential estimation in transcranial stimulation

2015

In this paper, a first application of the method of fundamental solutions in estimating the electric potential and the spatial current density distribution in the brain due to transcranial stimulation, is presented. The coupled boundary value p roblems for the electric potential are solved in a meshless way, so avoiding the use of grid based numerical methods. A multi-spherical geometry is considered and numerical results are discussed.

Regularized meshless methodMathematical optimizationmethod of fundamental solutionQuantitative Biology::Neurons and CognitionNumerical analysistranscranial electrical stimulationCurrent density distributionGrid basedBoundary valuesPhysics and Astronomy (all)Settore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaApplied mathematicsMethod of fundamental solutionsMeshfree methodsmeshless methodElectric potentialnumerical approximationMathematics
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Numerical solution of electric field integral equation for thin-wire piecewise antennas shape reconstruction

2012

Settore ING-INF/03 - TelecomunicazioniShape reconstructionThin-wire Antenna
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Numerical modelling for EM-Fields and biosystems interactions

2012

In this paper the electromagnetic fields related to the current sources in the human brain are investigated by means of the quasi-stationary approximation. The knowledge of these fields are of great interest to understand the human brain activity regions. By considering the current density produced by neural activity and because no current could ow out of the skull, the numerical model describing the problem can be fully defined. The current sources are simulated as current dipoles into an homogeneous sphere proceeding in the computation by solving the Poissons equation with Neumann boundary conditions. Numerical results relating to a spherical head representation are proposed by considerin…

Settore MAT/08 - Analisi NumericaMagnetoEncefaloGrafia Equazione di Poisson Modelli Numerici
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Numerical modelling of electromagnetic sources by integral formulation

2012

Analysis of electromagnetic (EM) transients can be carried out by employing a eld approach in frequency domain, based on an appropriate integral equation. This approach is a powerful method for the analysis of EM antennas and scatterers. Recent work by the authors in modeling electromagnetic scattering in frequency domain are summarized. Thin-wire electric eld integral equation has been handled and possible application in obtaining sources localization information are discussed. Moments method (MoM) is used and time domain analysis is also carried out by discrete Fourier transform. Di erent approaches have been considered by using direct MoM formulation. Simulation results obtained both via…

Inverse problemsSettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaIntegral EquationMethod of MomentIntegral Equations; Method of Moments; Inverse problems
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A Meshfree Solver for the MEG Forward Problem

2015

Noninvasive estimation of brain activity via magnetoencephalography (MEG) involves an inverse problem whose solution requires an accurate and fast forward solver. To this end, we propose the Method of Fundamental Solutions (MFS) as a meshfree alternative to the Boundary Element Method (BEM). The solution of the MEG forward problem is obtained, via the Method of Particular Solutions (MPS), by numerically solving a boundary value problem for the electric scalar potential, derived from the quasi-stationary approximation of Maxwell’s equations. The magnetic field is then computed by the Biot-Savart law. Numerical experiments have been carried out in a realistic single-shell head geometry. The p…

Computer scienceBiomagnetics magnetoencephalography (MEG) method of fundamental solutions (MFS) meshfree methodsScalar potentialInverse problemSolverBoundary knot methodElectronic Optical and Magnetic MaterialsSettore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaClassical mechanicsApplied mathematicsMethod of fundamental solutionsBoundary value problemElectrical and Electronic EngineeringBoundary element method
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Attenuation of low frequency magnetic fields produced by HV underground power cables

2015

High-voltage underground cable systems are becoming more common as the demand for electrical power within urban centers increase, also considering the difficulties in building new overhead power lines in the vicinity of city centers because of authorization issues. Therefore, interest towards the evaluation of magnetic fields produced by high-voltage power lines has been triggered during the last decade and concern about effects on human health of exposure to extra low frequency (ELF) magnetic fields due to power lines has been increasing as well. Hence, the evaluation of the magnetic field produced by underground power cables is important in order to develop methods for mitigating their in…

EngineeringMitigationbusiness.industryOverhead (engineering)Electrical engineeringLine (electrical engineering)Magnetic fieldPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaElectric power transmissionMagnetic FieldShieldingExtremely low frequencyElectric powerbusinessElectrical conductorUnderground Power Transmission Lines
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An augmented MFS approach for brain activity reconstruction

2017

Abstract Weak electrical currents in the brain flow as a consequence of acquisition, processing and transmission of information by neurons, giving rise to electric and magnetic fields, which can be modeled by the quasi-stationary approximation of Maxwell’s equations. Electroencephalography (EEG) and magnetoencephalography (MEG) techniques allow for reconstructing the cerebral electrical currents and thus investigating the neuronal activity in the human brain in a non-invasive way. This is a typical electromagnetic inverse problem which can be addressed in two stages. In the first one a physical and geometrical representation of the head is used to find the relation between a given source mo…

Electromagnetic fieldNumerical AnalysisGeneral Computer Sciencemedicine.diagnostic_testApplied MathematicsScalar (physics)010103 numerical & computational mathematicsMagnetoencephalographyInverse problem01 natural sciencesFinite element methodTheoretical Computer Science010101 applied mathematicsSettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaMethod of Fundamental Solutions Boundary value problems M/EEG LOOCV algorithmModeling and SimulationmedicineMethod of fundamental solutionsBoundary value problem0101 mathematicsBoundary element methodAlgorithmMathematics
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UN SOLUTORE MESHFREE PER M/EEG

2014

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaM/EEGmetodi numerici mesh-free
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Mitigation of 50 Hz magnetic field produced by an overhead transmission line

2015

Power transmission utilities are challenged by the need to expand transmission system capacity to meet growing energy demands. The impact of high voltage overhead transmission lines on the environment represents a hot topic in the context of transport and distribution of electrical energy. In particular, interest towards the effects of extra low frequency (ELF) magnetic fields generated by high-voltage power transmission lines has been increasing significantly during the last decade, giving rise to a number of policy initiatives and research activities. Therefore, the evaluation of the magnetic field generated by conductors of overhead lines is of primary importance in order to develop meth…

EngineeringPower transmissionMitigationbusiness.industryOverhead Transmission LinePassive loopOverhead (engineering)Electrical engineeringContext (language use)High voltageTransmission systemSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaElectric power transmissionTransmission lineMagnetic FieldElectronic engineeringPolyphase systembusiness
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STIMA DEL POTENZIALE ELETTRICO IN tDCS CON APPROCCIO MESHLESS INNOVATIVO

2015

Transcranial DC stimulation (transcranial Direct Current Stimulation, tDCS) is a non-invasive technique aimed at modifying neuronal activity for the purpose therapeutic and / or for the improvement of mental performance. A continuous current of entity modest (below the threshold of perception) is injected into the brain via electrodes placed on the scalp surface to produce changes in long-term cortical activity. Despite the increasing use of this and other similar techniques, and the relevant ones applications - for example in the field of neuropsychological rehabilitation - their impact on neuronal activity is not yet fully known, mainly due to the difficulty of predict the spatial distrib…

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaMehfree tDCS
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An Improved Solver for the M/EEG Forward Problem

2014

Noninvasive investigation of the brain activity via electroencephalography (EEG) and magnetoencephalography (MEG) involves a typical inverse problem whose solution process requires an accurate and fast forward solver. We propose the Method of Fundamental Solutions (MFS) as a truly meshfree alternative to the Boundary Element Method (BEM) for solving the M/EEG forward problem. The solution of the forward problem is obtained, via the Method of Particular Solutions (MPS), by numerically solving a set of coupled boundary value problems for the 3D Laplace equation. Numerical accuracy and computational load are investigated for spherical geometries and comparisons with a state-of-the-art BEM solv…

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaEEG MEG method of fundamental solutions meshfree methods
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A meshfree approach for brain activity source modeling

2015

Weak electrical currents in the brain flow as a consequence of acquisition, processing and transmission of information by neurons, giving raise to electric and magnetic fields, which are representable by means of quasi-stationary approximation of the Maxwell’s equations. Measurements of electric scalar potential differences at the scalp and magnetic fields near the head constitute the input data for, respectively, electroencephalography (EEG) and magnetoencepharography (MEG), which allow for reconstructing the cerebral electrical currents and thus investigating the neuronal activity in the human brain in a non-invasive way. This is a typical erectromagnetic inverse problem, since measuremen…

Settore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaMethod of fundamental solutions (MFS) source modeling inverse problems
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Review of acoustic methods for space charge measurement

2015

In the last decade, due to the increased use of direct current, the space charge accumulation phenomenon has reached more interest. In this regard, several non-destructive measurement systems were used. In particular, for solid dielectrics, the acoustic methods have had greater success. This review presents a brief historical evolution of the Pulse Electro- Acoustic (PEA) method, describing the working operation, the thicknesses analyzed and the spatial resolution for the different configurations of the PEA cell. The Pressure Wave Propagation (PWP) method in both configurations Piezo-PWP and Laser Induced Pressure Pulse (LIPP) is also described.

Materials sciencePressure Wave Propagation methodSystem of measurementAcousticsDirect currentDielectricLaser Induced Pressure Pulse methodSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSpace chargeTemperature measurementSpace chargePulse Electro- AcousticPulse (physics)PIPWPSettore ING-IND/31 - ElettrotecnicaElectronic engineeringacoustic methodPressure wave propagationPiezo-PWPImage resolution
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IMAGING DI CANALI SOTTILI PER APPLICAZIONI BIO-MEDICALI

2013

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi Numericaimagingapplicazioni bio-medicali
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Unconditionally stable meshless integration of time-domain Maxwell’s curl equations

2015

Grid based methods coupled with an explicit approach for the evolution in time are traditionally adopted in solving PDEs in computational electromagnetics. The discretization in space with a grid covering the problem domain and a stability step size restriction, must be accepted. Evidence is given that efforts need for overcoming these heavy constraints. The connectivity laws among the points scattered in the problem domain can be avoided by using meshless methods. Among these, the smoothed particle electromagnetics, gives an interesting answer to the problem, overcoming the limit of the grid generation. In the original formulation an explicit integration scheme is used providing, spatial a…

Regularized meshless methodElectromagneticsDiscretizationMeshless methodsApplied MathematicsMathematical analysisADI leapfrog methodSettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaComputational MathematicsAlternating direction implicit methodProblem domainSmoothed particle electromagneticsComputational electromagneticsMeshfree methodsApplied mathematicsTime domainMathematicsApplied Mathematics and Computation
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UN SOLUTORE MESHFREE PER EEG/MEG

2013

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaMEGMetodi senza griglia
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M/EEG Forward Model Computation Via Source-Adaptive Meshless Solving

2014

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaMeshless SolvingM/EEG Forward Model Computation
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IL METODO DELLE SOLUZIONI FONDAMENTALI PER LA SOLUZIONE DEL PROBLEMA DIRETTO M/EEG

2015

The research already started on the mesh-free solution of the M / EEG direct problem has led to the development of a solver based on the method of fundamental solutions (MFS, method of fundamental solutions) able to manage the physical-geometric complexity of realistic models of the head more efficiently than traditional.

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaMEGMetodi Meshfree; Metodo delle soluzioni fondamentali; EEG; MEGMetodo delle soluzioni fondamentaliMetodi MeshfreeEEG
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Beyond the BEM Solution of the M/EEG Forward Problem: a Meshfree Approach

2014

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi Numericameshfree solver EEG
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Studi numerici per la magnetoencefalografia

2012

Settore ING-IND/31 - ElettrotecnicaMagnetoencephalography numerical model
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Non-invasive imaging of biological microstructures by VHF waves

2014

Settore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaNon-invasive imagingInverse problemSettore MED/36 - Diagnostica Per Immagini E RadioterapiaMethod of Moments
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A Meshfree Boundary Method for M/EEG Forward Computations

2014

Meshfree methodSettore ING-IND/31 - ElettrotecnicaSettore MAT/08 - Analisi NumericaM/EEG Forward Computations
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A numerical method for imaging of biological microstructures by VHF waves

2014

Imaging techniques give a fundamental support to medical diagnostics during the pathology discovery as well as for the characterization of bio-medical structures. The imaging methods involve electromagnetic waves in a frequency range that spans from some Hz to GHz and over. Most of these methods involve ionizing waves and scanning of a large human body area even if only a focused inspection is needed. In this paper, a numerical method to evaluate the shape of microstructures for application in the medical field, with a very low invasiveness for the human body, is proposed. In particular, the tooth’s root canal is considered. In fact, this is one of the hot topics in the endodontic procedure…

Mathematical optimizationMedical diagnosticAcousticsRoot canalElectromagnetic radiationSettore MAT/08 - Analisi NumericaRobustness (computer science)medicineMethod of MomentLevenberg–Marquardt methodMethod of MomentsMathematicsNon-linear modelApplied MathematicsNumerical analysisBiological microstructureNon ionizing waveInverse problemMicrostructureMagnetic fieldSettore ING-IND/31 - ElettrotecnicaComputational Mathematicsmedicine.anatomical_structureLevenberg-Marquardt methodInverse problemSettore MED/36 - Diagnostica Per Immagini E RadioterapiaJournal of Computational and Applied Mathematics
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