Search Results - "Sarvas, J"

Bioelectromagnetic forward problem: isolated source approach revis(it)ed by Stenroos, M, Sarvas, J

“…Electro- and magnetoencephalography (EEG and MEG) are non-invasive modalities for studying the electrical activity of the brain by measuring voltages on the…”
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Basic mathematical and electromagnetic concepts of the biomagnetic inverse problem by Sarvas, J

“…In this paper basic mathematical and physical concepts of the biomagnetic inverse problem are reviewed with some new approaches. The forward problem is…”
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P 220. Why do we need methods for removing artifacts from TMS-evoked EEG data? by Hernandez-Pavon, J.C, Metsomaa, J, Stenroos, M, Sarvas, J, Ilmoniemi, R

“…Transcranial magnetic stimulation (TMS) combined with electroencephalography (EEG) is a powerful tool for studying cortical excitability and connectivity. In…”
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Broadband MLFMA With Plane Wave Expansions and Optimal Memory Demand by Dufva, T., Sarvas, J.

“…A broadband multilevel fast multipole algorithm (MLFMA) in 3D is presented based on plane wave expansions and diagonal translations on all division levels. The…”
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The Spatial and Temporal Distortion of Magnetic Fields Applied Inside a Magnetically Shielded Room by Vesanen, Panu T., Nieminen, Jaakko O., Zevenhoven, Koos C. J., Dabek, Juhani, Simola, Juha, Sarvas, Jukka, Ilmoniemi, Risto J.

“…In the context of biomagnetism, a magnetically shielded room (MSR) is designed for shielding against external magnetic fields. Recently, several applications,…”
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Scattering Model for a Pine Tree Employing VIE With a Broadband MLFMA and Comparison to ICA by Dufva, T., Praks, J., Jarvenpaa, S., Sarvas, J.

“…In this paper, we present accurate calculations of electromagnetic wave scattering from a high-detail pine tree model, which includes also the needles. We have…”
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Efficient Evaluation of the Rokhlin Translator in Multilevel Fast Multipole Algorithm by Hanninen, I., Sarvas, J.

“…In multilevel fast multipole algorithm (MLFMA) the direct evaluation of the Rokhlin translator is computationally expensive, and usually the cost is lowered by…”
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Broadband Müller-MLFMA for Electromagnetic Scattering by Dielectric Objects by Wallen, H., Jarvenpaa, S., Yla-Oijala, P., Sarvas, J.

“…The multilevel fast multipole algorithm (MLFMA) is very efficient for solving large-scale electromagnetic scattering problems. However, at low frequencies, or…”
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S48-4 TMS and EEG by Ilmoniemi, R.J, Mäki, H, Hernandez Pavon, J.C, Korhonen, R, Metsomaa, J, Sarvas, J

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Magnetic-Field-Induced ELF Currents in a Human Body by the Use of a GSM Phone by Ilvonen, S., Sarvas, J.

“…A finite element method (FEM) with nonuniform mesh is employed for the calculation of extremely low frequency (ELF) currents induced in a human body by a…”
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Realistic conductivity geometry model of the human head for interpretation of neuromagnetic data by Hamalainen, M.S., Sarvas, J.

“…The computational and practical aspects of a realistically shaped multilayer model for the conductivity geometry of the human head are discussed. A method to…”
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Method of moments analysis of the backscattering properties of a corrugated trihedral corner reflector by Hanninen, I., Pitkonen, M., Nikoskinen, K.I., Sarvas, J.

“…A method of moments (MoM) formulation is developed to analyze the backscattering properties of an anisotropic trihedral corner reflector, which is obtained by…”
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Using Multilook Averaging for Coherently Modeled Scattering From a Pine Tree at L-Band by Praks, J., Sarvas, J., Hallikainen, M., Pulliainen, J.

“…In this letter, we study scattering from a scots pine tree by using a realistic cylinder model of the tree and the coherent electric field scattering model. We…”
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P145 Automated search of TMS targets based on electromyography and electroencephalography signals by Tervo, A., Nieminen, J., Metsomaa, J., Lioumis, P., Sarvas, J., Ilmoniemi, R.

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Multilayered Media Green's Functions for Mpie With General Electric and Magnetic Sources By the Hertz Potential Approach - Abstract by Yla-Oijala, P., Taskinen, M., Sarvas, J.

“…A complete set of three dimensional multilayered media Green's functions is presented for general electric and magnetic sources. The Green's functions are…”
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Multilayered media green's functions for mpie with general electric and magnetic sources by the hertz potential approach by YLÄ-OIJALA, P, TASKINEN, M, SARVAS, J

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Performing Interpolation and Anterpolation Entirely by Fast Fourier Transform in the 3-D Multilevel Fast Multipole Algorithm by Sarvas, Jukka

“…The fast multipole methods are used for solving a scalar acoustic or vector electromagnetic wave equation by integral equation methods with a large number of…”
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Mixed and sensory nerve stimulations activate different cytoarchitectonic areas in the human primary somatosensory cortex SI: neuromagnetic recordings and statistical considerations by KAUKORANTA, E, HAMALAINEN, M, SARVAS, J, HARI, R

“…Magnetic responses evoked by stimulation of the mixed median nerve at the wrist and its cutaneous branches on the glabrous skin of the index and middle fingers…”
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A direct approach to solving the drift-diffusion model equations for use in certain MOSFET devices by Sarvas, J., Spanier, J.

“…The behavior of metal oxide semiconductor field effect transistors (MOSFETs) has frequently been modeled using the drift-diffusion partial differential…”
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Feasibility of the homogeneous head model in the interpretation of neuromagnetic fields by Hämäläinen, M S, Sarvas, J

“…During the past few years it has been demonstrated that active areas in the human brain can be located by measuring the magnetic fields arising from the…”
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