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An efficient two-dimensional FDTD method for bio-electromagnetic applications

Rui Qiang, Dagang Wu, Ji Chen, Shumin Wang, D. Wilton, W. Kainz
2006 IEEE transactions on magnetics  
Numerical examples are used to demonstrate the effectiveness of this technique. Index Terms-Algebraic multi-grid method, bio-electromagnetics, FDTD method, unconditionally stable algorithm.  ...  We propose an efficient algorithm for the simulation of densely sampled biological objects.  ...  ACKNOWLEDGMENT This work was supported in part by the National Science Foundation under Grant BES-0332957.  ... 
doi:10.1109/tmag.2006.871947 fatcat:m6pvzh42cncblgreswzodk4m4q

ANALYSIS OF THE TEMPERATURE INCREASE LINKED TO THE POWER INDUCED BY RF SOURCE

Ahmed Ibrahiem, Christian Dale, Walid Tabbara, Joe Wiart
2005 Electromagnetic Waves  
Four different numerical methods, in particular an implicit method based on the Alternating Direction Implicit technique (ADI), were applied to solve the Bio-Heat Equation (BHE), their advantages and limitations  ...  Temperature increase analysis has been performed with consideration to the anatomical model of the human head exposed to a cellular phone operating at 900 MHz.  ...  Furthermore, the stability analysis of this implicit method was studied in case of the BHE.  ... 
doi:10.2528/pier04062501 fatcat:3ofzg3aagbgnnh57cctbvykile

Influence of Heat Sources and Relaxation Time on Temperature Distribution in Tissues

S. Sharma, K. Sharma
2014 International Journal of Applied Mechanics and Engineering  
In the present study, the temperature fluctuations in tissues based on Penne's bio-heat transfer equation is investigated by applying the Laplace and Hankel transforms.  ...  To get the solution in a physical form, a numerical inversion technique has been applied.  ...  Different mathematical methods may be applied for the computational study of temperature distributions in the biomass irradiated by a source of electromagnetic radiation.  ... 
doi:10.2478/ijame-2014-0029 fatcat:hbhqcelo4vcjrflbnjr2vf6q3a

Numerical Method for Exposure Assessment of Wireless Power Transmission under Low-Frequency Band

Minhyuk Kim, SangWook Park, Hyun-Kyo Jung
2016 Journal of Magnetics  
In this paper, an effective numerical analysis method is proposed for calculating dosimetry of the wireless power transfer system operating low-frequency ranges.  ...  However, applying the standard method in the low-frequency band incurs an inordinate number of time steps.  ...  The standard FDTD method is selected for a comparison of the numerical technique, as it is widely used to solve bio-electromagnetic problems.  ... 
doi:10.4283/jmag.2016.21.3.442 fatcat:qot4yfb3rjht7p7qb3qhtd7lti

Adjusting Electrode Potentials to Compensate Thermal/Tissue Effects in Deep Brain Stimulation via Finite Element Electromagnetic Analysis

Wei-Yi Chuang, Paul C.-P. Chao, Kuu-Young Young
2010 IEEE transactions on magnetics  
These studies consider only one of the two complexity factors due to the intrusion of the DBS lead: 1) a layer of extracellular fluid and giant cell often formed around the DBS leads, called the peri-electrode  ...  Some previous studies have been devoted for numerical simulations to find suitable electrode voltage levels for pre-desired stimulated strength and region.  ...  These studies perform varied electromagnetic numerical analyses to find adjusted electrode voltage to compensate the effects of the growth of the peri-electrode space, often resulting in an increased voltage  ... 
doi:10.1109/tmag.2010.2046399 fatcat:pmnoz2nfzfbmth26pcddwmthfm

Foreword Special Section on Recent Progress in Electrical Modeling and Simulation of High-Speed ICs and Packages

Dan Jiao
2010 IEEE Transactions on Advanced Packaging  
circuits, applied electromagnetics, fast and high-capacity numerical methods, fast time domain analysis, scattering and antenna analysis, RF, microwave, and millimeter wave circuits, wireless communication  ...  , and bio-electromagnetics.  ...  The paper entitled "A Flexible Time-Stepping Scheme for Hybrid Field-Circuit Simulation Based on the Extended Time-Domain Finite Element Method" describes a flexible time-stepping scheme for a recently  ... 
doi:10.1109/tadvp.2010.2099155 fatcat:ycgxxqyjiffglo66ynfdigbwk4

Numerical analysis of plasmonic metasurfaces for fluorescence enhancement

Roxana Tomescu, Florin Nita, Stefan Caramizoiu, Veronica Anastasoaie, Dana Cristea, C. Sibilia, A. Belardini, G. Pauliat
2021 EPJ Web of Conferences  
The paper presents an extensive numerical analysis performed by three-dimensional (3D) simulations using the finite difference in time and space (FDTD) method to identify the optimal geometry, size and  ...  The aim was to achieve the highest resonance at various wavelengths (NIR-VIS), for local enhancement of the excitation field and collection efficiency of emitted photons.  ...  The geometrical parameters analysis and material studies of the nano-structures were performed applying 3D -FDTD method using the OptiFDTD commercial software developed by Opti Wave Canada.  ... 
doi:10.1051/epjconf/202125504004 fatcat:tmvma6nimve7tp657rbv2wjwve

Digital Signal Processing Techniques:Calculating Biological Functionalities

Norbert Nwankwo
2012 Journal of Proteomics & Bioinformatics  
The steps include: Step 1: Conversion of the Protein Residues into Numerical Values Electron-ion Interaction Pseudopotenatial (EIIP) Parameter: There are 20 essential amino acids constituents (protein  ...  Enfuvirtide is currently in use for the management of anti-HIV/AIDS while Sifuvirtide is still being studied.  ...  Step 4: Cross-spectral Analysis: In order to identify the common biological relationship amongst proteins, point-wise multiplication of the Spectral Characteristics of the protein residues are applied  ... 
doi:10.4172/jpb.1000199 fatcat:4reoftctsfddtiyfmcnhidnpni

Analysis and FDTD Modeling of the Influences of Microwave Electromagnetic Waves on Human Biological Systems

Anthony Bassesuka Sandoka Nzao
2022 Open Journal of Applied Sciences  
Mathematical analysis using Maxwell's equations as well as bio-heat equations is the basis of this study for a consistent result.  ...  For this purpose, the detailed on the mechanisms of interaction of microwave electromagnetic waves with the human body have been presented.  ...  As a result, we have therefore deemed it useful that modeling based on the electrical-thermal analogy of a human biological tissue analyzed from bio-heat equations is more suitable for the study of a system  ... 
doi:10.4236/ojapps.2022.126063 fatcat:7mdenzybajcglfo7u4yi6lpdvu

A wide-band bio-chip for real-time optical detection of bioelectromagnetic interactions with cells

Caterina Merla, Micaela Liberti, Paolo Marracino, Adeline Muscat, Antoine Azan, Francesca Apollonio, Lluis M. Mir
2018 Scientific Reports  
This original bio-chip based on the grounded closed coplanar waveguide concept opens new possibilities for the development of controlled experiments combining electromagnetic exposures and sophisticated  ...  The analytical and numerical design, implementation, and experimental validation of a new grounded closed coplanar waveguide for wide-band electromagnetic exposures of cells and their optical detection  ...  Materials and Methods Numerical simulations: GCCPW in air.  ... 
doi:10.1038/s41598-018-23301-w pmid:29568067 pmcid:PMC5864909 fatcat:mcpv4wd6ujgklj52myj62mozqe

Interstitial microwave hyperthermia treatment investigations

N Siauve, C Lormel
2012 Journal of Physics, Conference Series  
The aim of this study is to propose a design procedure and develop the associated tools, for determining the optimal shape, dimensions, type and operating frequency of antenna according to the target volume  ...  In this context, a 3D numerical predictive model of temperature elevation induced by the electric fields and two benches for thermal and electrical tissues properties characterization have been developed  ...  Then, 3D numerical model based on the Pennes bio-heat equation, resolved with Finite Element (FE) and used on realistic 3D model of the human body is presented.  ... 
doi:10.1088/1742-6596/395/1/012001 fatcat:jqje2bhzrrfpvmn2w4uoc567ga

GRATING EFFECTS ON SIDELOBE SUPPRESSION IN MIM PLASMONIC FILTERS

Ramin Djabery, Saeid Nikmehr, Shahram Hosseinzadeh
2013 Electromagnetic Waves  
The frequency response for the transmission coefficient of the MIM plasmonic filter is derived by TRC-LOD-FDTD method.  ...  The variation in the frequency response of the filter due to changes in the structural parameters is studied.  ...  Next, the TRC-LOD-FDTD method of analysis was applied to the MIM plasmonic filter and the transmission coefficient was derived.  ... 
doi:10.2528/pier12102809 fatcat:hmz263vhcncj3l4ckewjjwgfmq

Detection of Chlorpyrifos Using Bio-Inspired Silver Nanograss

Hyunjun Park, Joohyung Park, Gyudo Lee, Woong Kim, Jinsung Park
2022 Materials  
The efficiency of the SERS method was confirmed through experiments and finite element method (FEM)-based electromagnetic simulations.  ...  In this study, we utilized the intrinsic properties of natural lawns that grow randomly and intertwine with each other to have a large surface area to promote photosynthesis.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/ma15103454 pmid:35629481 pmcid:PMC9146306 fatcat:clcxqj2cjzdmjit6h24pt4onfm

Review on finite element method

I.D. Erhunmwun, U.B. Ikponmwosa
2017 Journal of Applied Sciences and Environmental Management  
The eventual intension of using FEM is to determine the nodal solution of a particular problem under study. The power of FEM is its ability to discretize complex problems and analyse it part by part.  ...  Irrespective of the geometry of the problem, with proper mesh refinement, FEM provides very accurate solution.  ...  In fact, the method has become one of the research areas for applied mathematicians (Rao, 1982) .  ... 
doi:10.4314/jasem.v21i5.30 fatcat:jqz4pxhauvb7zi4drasuqbvpkq

A mimetic discretization of the Reissner–Mindlin plate bending problem

L. Beirão da Veiga, D. Mora
2011 Numerische Mathematik  
The method applies to very general polygonal meshes, even with non matching or non convex elements. We prove linear convergence for the method uniformly in the plate thickness.  ...  We present a mimetic approximation of the Reissner-Mindlin plate bending problem which uses deflections and rotations as discrete variables.  ...  In the present paper, we propose a MD method which applies to general polygonal (even non-conforming or non-convex) meshes and which takes the steps from the MITC philosophy.  ... 
doi:10.1007/s00211-010-0358-8 fatcat:575laedn7zdwphadz4u4xpetsm
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