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

Dimensionless Groups in Fluid Mechanics01:15

Dimensionless Groups in Fluid Mechanics

897
Dimensionless groups in fluid mechanics provide simplified ratios that help analyze fluid behavior without relying on specific units. The Reynolds number (Re), which represents the ratio of inertial to viscous forces, distinguishes between laminar and turbulent flows, making it essential in the design of pipelines and aerodynamic surfaces. The Froude number (Fr), the ratio of inertial to gravitational forces, is particularly useful in predicting wave formation and hydraulic jumps in...
897
Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

7.2K
It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a...
7.2K
Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

5.0K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
5.0K
First Law: Particles in One-dimensional Equilibrium01:10

First Law: Particles in One-dimensional Equilibrium

8.4K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
8.4K
Relative Velocity in One Dimension01:10

Relative Velocity in One Dimension

11.2K
The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...
11.2K
Symmetry in Maxwell's Equations01:28

Symmetry in Maxwell's Equations

4.5K
Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
4.5K

You might also read

Related Articles

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

Sort by
Same author

Clinical and Prognostic Relevance of Cycle Pattern Recognition in Bipolar Disorder: A Further Step Toward Personalised Treatment Pathways?

Current neuropharmacology·2026
Same author

Social vulnerability shapes deep clinical phenotypes and brain health in aging and dementia across Latin America.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026
Same author

Mapping the neurovascular landscape in aging and dementia: cerebral small vessel disease markers in a multicenter Latin American cohort.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026
Same author

Characterizing circadian rest-activity rhythm patterns across Alzheimer's disease continuum in Down syndrome.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026
Same author

Neural embedding of frailty in cognitively unimpaired aging and dementia across Latin America.

Alzheimer's & dementia : the journal of the Alzheimer's Association·2026
Same author

Costs associated with delirium among older patients undergoing complex spine surgeries.

Journal of neurosurgery. Spine·2026
Same journal

Erratum: Low-dimensional model for adaptive networks of spiking neurons [Phys. Rev. E 111, 014422 (2025)].

Physical review. E·2026
Same journal

Disentangling the effects of many-body forces on depletion interactions.

Physical review. E·2026
Same journal

Charge transport and mode transition in dual-energy electron beam diodes.

Physical review. E·2026
Same journal

Optimization of multisite reactions in complex compartmentalized media.

Physical review. E·2026
Same journal

Origin of geometric cohesion in nonconvex granular materials: Interplay between interdigitation and rotational constraints enhancing frictional stability.

Physical review. E·2026
Same journal

Interaction of walkers with a standing Faraday wave.

Physical review. E·2026
See all related articles

Related Experiment Video

Updated: Mar 21, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

9.1K

Cosmology in one dimension: Vlasov dynamics.

Giovanni Manfredi1, Jean-Louis Rouet2, Bruce Miller3

  • 1Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS and Université de Strasbourg, Boîte Postale 43, F-67034 Strasbourg Cedex 2, France.

Physical Review. E
|May 14, 2016
PubMed
Summary
This summary is machine-generated.

Vlasov codes provide accurate simulations of cosmological systems, overcoming limitations of N-body methods in low-density regions. This study confirms N-body results and extends fractal property analysis in an expanding Einstein-de Sitter universe.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K
Quantifying Cytoskeleton Dynamics Using Differential Dynamic Microscopy
06:37

Quantifying Cytoskeleton Dynamics Using Differential Dynamic Microscopy

Published on: June 15, 2022

4.2K

Related Experiment Videos

Last Updated: Mar 21, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

9.1K
Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K
Quantifying Cytoskeleton Dynamics Using Differential Dynamic Microscopy
06:37

Quantifying Cytoskeleton Dynamics Using Differential Dynamic Microscopy

Published on: June 15, 2022

4.2K

Area of Science:

  • Cosmology
  • Astrophysics
  • Computational Physics

Background:

  • N-body codes are standard for self-gravitating systems but struggle with statistical sampling in low-density areas.
  • Vlasov codes offer higher accuracy across all densities by simulating phase space.

Purpose of the Study:

  • To investigate the fractal properties of an expanding Einstein-de Sitter universe using Vlasov codes.
  • To compare Vlasov code results with N-body simulations in a 1D cosmological context.

Main Methods:

  • One-dimensional Vlasov simulations were employed.
  • The simulations focused on Newtonian gravity within an expanding Einstein-de Sitter universe model.

Main Results:

  • Vlasov code simulations confirmed established N-body results in high-density regions.
  • The study successfully extended the analysis to low-density regions where N-body methods typically fail.

Conclusions:

  • Vlasov codes are a more robust tool for simulating cosmological systems, especially in underdense regions.
  • This work provides a more complete understanding of fractal properties in the Einstein-de Sitter model.