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

Constraints and Statical Determinacy01:26

Constraints and Statical Determinacy

In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

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 motion,...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...

You might also read

Related Articles

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

Sort by
Same author

A Rash and Red Urine.

The New England journal of medicine·2026
Same author

Translation-dependent degradation of cas12 mRNA triggered by an anti-CRISPR.

Nature·2026
Same author

Unconventional Lysine-Type Lipid Assemblies Enable Efficient Antisense Oligonucleotide Delivery with Distinct Structural Features.

Pharmaceutics·2026
Same author

Pre-operative corticosteroid injections are associated with a dose-dependent risk for complications following anatomic and reverse total shoulderarthroplasty.

Journal of shoulder and elbow surgery·2026
Same author

Author Correction: Inhibiting membrane rupture with NINJ1 antibodies limits tissue injury.

Nature·2025
Same author

The Effect of Body Mass Index on the Efficacy of Semaglutide Use at the Time of Total Knee Arthroplasty.

The Journal of arthroplasty·2025

Related Experiment Video

Updated: May 18, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Robust constraint on cosmic textures from the cosmic microwave background.

Stephen M Feeney1, Matthew C Johnson, Daniel J Mortlock

  • 1Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom. stephen.feeney.09@ucl.ac.uk

Physical Review Letters
|September 26, 2012
PubMed
Summary

Cosmic microwave background (CMB) data analysis shows no evidence for cosmic textures, which are theorized early Universe defects. Current findings do not support adding textures to the standard cosmological model.

More Related Videos

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

Related Experiment Videos

Last Updated: May 18, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

Area of Science:

  • Cosmology
  • Astrophysics
  • Particle Physics

Background:

  • Cosmic Microwave Background (CMB) fluctuations are key to the standard cosmological model.
  • Topological defects like cosmic textures are potential additions to this model.
  • Textures are predicted to create specific hot and cold spots in the CMB.

Purpose of the Study:

  • To rigorously test the cosmic texture hypothesis using observational data.
  • To determine if cosmic textures should be included in the standard cosmological model.

Main Methods:

  • Bayesian statistical methods were employed for hypothesis testing.
  • Full-sky data from the Wilkinson Microwave Anisotropy Probe (WMAP) was analyzed.

Main Results:

  • The analysis found no compelling evidence to support the existence of cosmic textures.
  • Models predicting more than 6 detectable cosmic textures were ruled out at 95% confidence.

Conclusions:

  • Current CMB data do not necessitate augmenting the standard cosmological model with cosmic textures.
  • The texture hypothesis is not supported by the analyzed WMAP data.