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Related Concept Videos

Induced Electric Fields01:23

Induced Electric Fields

3.7K
The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...
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Electric Field01:16

Electric Field

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Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
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Electric Field Lines01:25

Electric Field Lines

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The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
The solution to this problem is to use electric field lines, which are not vectors but...
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Induced Electric Fields: Applications01:27

Induced Electric Fields: Applications

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An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
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Hybrid Zones02:29

Hybrid Zones

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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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Phase Changes01:19

Phase Changes

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Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
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Updated: Jun 30, 2025

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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PFHub: The Phase-Field Community Hub.

Daniel Wheeler1, Trevor Keller1, Stephen J DeWitt2

  • 1Materials Science and Engineering Division,Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA.

Journal of Open Research Software
|March 15, 2024
PubMed
Summary
This summary is machine-generated.

Scientific communities can now share content and data more effectively using a new online portal framework. This PFHub framework supports phase-field practitioners and code developers in improving code quality assurance.

Keywords:
jekyll-websitematerials-sciencephase-fieldreproducible-science

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Area of Science:

  • Computational materials science
  • Scientific data sharing

Background:

  • Scientific communities face challenges in efficient content and data sharing.
  • Existing online portals like microMAG, IPR, and GenBank demonstrate the value of centralized platforms.

Purpose of the Study:

  • To present a generic web portal framework (PFHub) for scientific communities.
  • To enable adoption by other small scientific communities for improved collaboration and data management.

Main Methods:

  • Leveraging existing online services to build a flexible framework.
  • Developing the first deployment, PFHub, tailored for phase-field practitioners.

Main Results:

  • A description of a generic, adaptable web portal framework is provided.
  • The PFHub framework is operational and supports a specific scientific community.

Conclusions:

  • The PFHub framework offers a scalable solution for scientific content and data sharing.
  • This framework can be adopted by other small scientific communities to enhance collaboration and quality assurance.