Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
Gauss's Law in Dielectrics01:17

Gauss's Law in Dielectrics

Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation

This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
Electric Field of a Charged Disk01:23

Electric Field of a Charged Disk

The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
Region of Convergence of Laplace Tarnsform01:20

Region of Convergence of Laplace Tarnsform

The Region of Convergence (ROC) is a fundamental concept in signal processing and system analysis, particularly associated with the Laplace transform. The ROC represents an area in the complex plane where the Laplace transform of a given signal converges, determining the transform's applicability and utility.
Consider a decaying exponential signal that begins at a specific time. When deriving its Laplace transform, the time-domain variable is replaced with a complex variable. This substitution...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Quantitative Analysis of Organic Liquid Three-Component Systems: Near-Infrared Transmission versus Raman Spectroscopy, Partial Least Squares versus Classical Least Squares Regression Evaluation and Volume versus Weight Percent Concentration Units.

Molecules (Basel, Switzerland)·2019
Same author

microRNA-221 restricts human cytomegalovirus replication via promoting type I IFN production by targeting SOCS1/NF-κB pathway.

Cell cycle (Georgetown, Tex.)·2019
Same author

Hydrogen bonding derived self-healing polymer composites reinforced with amidation carbon fibers.

Nanotechnology·2019
Same author

Comparative analysis of the main active constituents from different parts of Leonurus japonicus Houtt. and from different regions in China by ultra-high performance liquid chromatography with triple quadrupole tandem mass spectrometry.

Journal of pharmaceutical and biomedical analysis·2019
Same author

The Comprehensive Evaluation of Safflowers in Different Producing Areas by Combined Analysis of Color, Chemical Compounds, and Biological Activity.

Molecules (Basel, Switzerland)·2019
Same author

The DNA-binding mechanism of the TCS response regulator ArlR from Staphylococcus aureus.

Journal of structural biology·2019

Related Experiment Video

Updated: Jul 10, 2026

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model
11:19

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Published on: February 10, 2011

Estimating regional conductivity in 2D disc head model by multidemensional support vector regression.

Xueqin Shen1, Hui Yan, Weili Yan

  • 1School of Electrical Engineering and Automation, Hebei University of Technology, 8 Guangrong Dao, Tianjin, Box 388, 300130 China. wlyan@hebut.edu.cn

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 16, 2007
PubMed
Summary

This study presents a new multidimensional support vector regression (MSVR) method for estimating regional conductivity in 2D models. The technique accurately locates conductivity disturbances and estimates tissue conductivities with minimal error.

More Related Videos

Cortical Source Analysis of High-Density EEG Recordings in Children
09:32

Cortical Source Analysis of High-Density EEG Recordings in Children

Published on: June 30, 2014

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms
08:51

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms

Published on: November 1, 2019

Related Experiment Videos

Last Updated: Jul 10, 2026

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model
11:19

Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model

Published on: February 10, 2011

Cortical Source Analysis of High-Density EEG Recordings in Children
09:32

Cortical Source Analysis of High-Density EEG Recordings in Children

Published on: June 30, 2014

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms
08:51

Statistical Modelling of Cortical Connectivity Using Non-invasive Electroencephalograms

Published on: November 1, 2019

Area of Science:

  • Electrical Engineering
  • Biomedical Engineering
  • Computational Modeling

Background:

  • Accurate estimation of regional conductivity is crucial for understanding complex biological tissues and developing diagnostic tools.
  • Existing methods for conductivity estimation in 2D models face challenges in precisely locating disturbed areas and handling multi-tissue environments.

Purpose of the Study:

  • To introduce and validate a novel Multidimensional Support Vector Regression (MSVR) method for regional conductivity estimation.
  • To assess the capability of the MSVR method in identifying the location of disturbed conductivity in a 2D disc head model.
  • To evaluate the accuracy of MSVR in estimating tissue conductivities within a complex 2D disc head model comprising four distinct tissue types.

Main Methods:

  • Development of a Multidimensional Support Vector Regression (MSVR) algorithm.
  • Integration of an Iterative Re-weight Least Square (IRWLS) procedure for parameter estimation.
  • Application of the MSVR-IRWLS method to a 2D disc head model for conductivity mapping.

Main Results:

  • The MSVR method successfully determined the regional location of disturbed conductivity in the 2D disc head model.
  • Accurate estimation of tissue conductivities was achieved for models with single and four-tissue types.
  • Estimation errors for conductivity values were consistently within a few percent, demonstrating high precision.

Conclusions:

  • The proposed MSVR with IRWLS is an effective and accurate technique for regional conductivity estimation in 2D models.
  • This method shows significant potential for applications requiring precise conductivity mapping in biological and engineered systems.
  • The high accuracy achieved suggests MSVR is a robust tool for analyzing conductivity variations in complex models.