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Related Concept Videos

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The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
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Analyzing Mitochondrial Morphology Through Simulation Supervised Learning
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Analyzing and Biasing Simulations with PLUMED.

Giovanni Bussi1, Gareth A Tribello2

  • 1Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy. bussi@sissa.it.

Methods in Molecular Biology (Clifton, N.J.)
|August 10, 2019
PubMed
Summary
This summary is machine-generated.

The PLUMED plugin enhances molecular dynamics by analyzing trajectories and computing free energy using collective variables. It enables enhanced sampling simulations and extracts free-energy surfaces with error bars.

Keywords:
Collective variablesEnhanced samplingFree energyPLUMEDReplica exchangeWHAM

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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
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Area of Science:

  • Computational chemistry
  • Molecular dynamics simulations
  • Biophysics

Background:

  • Molecular dynamics (MD) simulations are crucial for understanding molecular behavior.
  • Analyzing MD trajectories often requires advanced techniques to extract meaningful information.
  • Free energy calculations provide insights into molecular processes and stability.

Purpose of the Study:

  • To detail the application of the PLUMED plugin for analyzing and biasing molecular dynamics trajectories.
  • To explain the computation of free energy as a function of collective variables.
  • To discuss practical considerations and advanced sampling techniques using PLUMED.

Main Methods:

  • Introduction to collective variables for MD analysis.
  • Free energy computation using collective variables.
  • Discussion of periodic boundary conditions in PLUMED calculations.
  • Enhanced sampling simulations: biasing, multiple replicas, and Monte Carlo exchanges.
  • Weighted histogram and block averaging techniques for data analysis.

Main Results:

  • PLUMED facilitates the analysis of molecular dynamics trajectories.
  • Free energy surfaces can be computed as a function of collective variables.
  • Enhanced sampling methods improve the efficiency of exploring molecular configurations.
  • Accurate extraction of free-energy surfaces and error bars is achievable.

Conclusions:

  • The PLUMED plugin is a versatile tool for advanced molecular dynamics analysis.
  • It enables efficient free energy calculations and enhanced sampling simulations.
  • PLUMED aids in extracting reliable thermodynamic information from complex simulations.