H. Kwon, R. Huancaya
Andrews University, Berrien Springs, MI, USA
Vein visualization systems such as the VeinViewer are vein-contrast enhancement devices that use an infrared camera to highlight blood or the underlying vasculature and project the image in real time onto the skin. Understanding the light propagation in a realistic skin model is critical, but only a few computational models have been developed to account for this particular system. We have ...
Y. Sheng, and L. Yu
Quebec City, QC
A biconcave-shaped Red Blood Cell was trapped and deformed in a dual-trap optical tweezers. The two highly focused trapping beams of Gaussian intensity distribution were modeled as background field in the COMSOL Radio Frequency Module. The 3D radiation stress distribution on the cell surface was computed via the Maxwell stress tensor. The 3D deformation of the cell was computed with the ...
Stochastic Diffusion of Calcium Ions Through a Nanopore in the Cell Membrane Created by Electroporation - new
O. Henao, V. Gómez, I. De La Pava, J. Sánchez 
Grupo Fisiología Celular y Aplicada, Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia
We simulated the diffusion of calcium ions through a nanopore created in the cell membrane by electroporation, in presence and absence of the external electric field responsible of the membrane permeabilization. First we solved the set of coupled differential equations that describe the process of ionic diffusion in a 2D nanopore model using the AC/DC Module and the Transport of Diluted Species ...
G. Zhang, Y. Zhao, J. Hodge, J. Brcka, J. Faguet, E. Lee
Clemson University, Clemson, SC, USA
TEL U.S. Holdings, Inc., U.S. Technology Development Center, Austin, TX, USA
In using DEP for particle manipulation, researchers often use a formula to calculate the DEP forces in which the forces are proportional to the particle radius to the third power. This formula assumes that the electrical field, E, will not be affected by the presence of a particle, no matter what the actual size and the dielectric property of the particle are. This work confirms that the ...
E. Lacatus, M. A. Sopronyi, G. C. Alecu, A. Tudor
Polytechnic University of Bucharest, Bucharest, Romania
INFLPR -National Institute for Laser Plasma and Radiation Physics, Bucharest, Romania
For biocompatible prosthetics, from dental implants up to bone parts, manufacturers have to find the best way to correlate process parameters and the material properties as to meet the unique needs of individuals. Additive manufacturing techniques aim at creating complex biocompatible structures able to overcome the present shortfalls of the metal and metal alloys implants related to ...
R. Appali, S. Petersen, J. Gimsa, and U. Rienen
 Institute of General Electrical Engineering, Chair of Electromagnetic Field Theory, University of Rostock, Germany
 Institute of Biology, Chair of Biophysics, University of Rostock, Germany
Study of neurons plays a key role in the fields of basic and medical research aiming at the development of electrically active implants. The Fitzhugh-Nagumo equations are used to model and simulate the spike generation and propagation in a squid giant axon using COMSOL Multiphysics® 3.5a Software. It is shown that the Fitzhugh-Nagumo equations allow for a geometrical explanation of ...
D. Mondal, C. RoyChaudhuri
Department of Electronics and Telecommunication Engineering, Bengal Engineering and Science University, Howrah, West Bengal, India
In this paper, the gross electrical characterization of biological cells on porous substrate is analyzed using COMSOL Multiphysics®. Dynamic electrical characterization during cell growth is used as a non-invasive and label-free technique to understand the growth kinetics of cells. It is observed from the COMSOL simulation that the percentage change in the current density is greater in porous ...
M.Vidya, M. SharatDivya, N.Priyadarshini, E.R Rajkumar
Division of Biomedical Engineering, Center for Biomedical Engineering Research, School Of Biosciences and Technology, VIT University Vellore, India.
Deep Brain Stimulation (DBS) is a surgical technique that involves surgically implanting Platinum electrode to create an electric field to activate the targeted nerve cells and fibers with minimized side effects. Important stimulation parameters to monitor include temperature, electric field intensity and the current density.This paper gives a Finite Element Model (FEM) for DBS electrode in ...
L. T. Izu, Z. Coulibaly, B. Peercy
University of California-Davis, Davis, CA, USA
University of Maryland, Catonsville, MD, USA
This paper utilizes the COMSOL Multiphysics® general form PDE interface and MATLAB® to model stochastic calcium waves in a sarcomere (basic unit of a heart cell). The model we present here shows the evolution of waves generated from calcium being released stochastically from sites modeled as point sources. The release sites are distributed on z-disc (planes) in a hexagonal pattern, and their ...
Acoustic Field Comparison of High Intensity Focused Ultrasound Using Experimental Characterization and Finite Element Simulation
J. L. Teja, A. Vera, L. Leija
Department of Electrical Engineering, Cinvestav-IPN, Mexico D.F., Mexico
High Intensity Focused Ultrasound (HIFU) is used as a noninvasive technique of tissue heating and ablation for different medical treatments. This paper presents a quantitative comparison of HIFU acoustic fields experimentally obtained versus simulated acoustic fields. Acoustic field characterization was realized in two HIFU transducers using water as a propagation medium. Also, simulations were ...