Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

What is a Mode?

What is a Mode?

The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...

Lysogenic Cycle of Bacteriophages

Lysogenic Cycle of Bacteriophages

In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...

Lytic Cycle of Bacteriophages

Lytic Cycle of Bacteriophages

Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

The Water Cycle

The Water Cycle

The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.

Ventilatory Modes

Ventilatory Modes

Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...

You might also read

Related Articles

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

Sort by

Same journal

The Behaviour of the EUV Corona Before Flares in Regions with High Free Magnetic Energy.

Solar physics·2026

Same journal

SSTrack: An Automatic Sunspot Identification and Tracking Algorithm to Support the Measurement of Sunspot Rotation.

Solar physics·2026

Same journal

Solar Cycle Variation of Sustained Gamma Ray Emission from the Sun.

Solar physics·2026

Same journal

The EUV Late-Phase: Statistical Results from 15 Years of Solar Dynamics Observatory Observations.

Solar physics·2026

Same journal

Investigating the Relationship Between Physical Properties and Spatial Irregularities at Coronal Hole Boundaries.

Solar physics·2026

Same journal

A Geomagnetic Estimate of Heliospheric Modulation Potential over the Last 175 Years.

Solar physics·2026

Search research articles

Related Experiment Video

Updated: Jan 27, 2026

Flash Infrared Annealing for Perovskite Solar Cell Processing

Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

GONG p-Mode Parameters Through Two Solar Cycles.

René Kiefer^1,2,3, Rudi Komm³, Frank Hill³

¹1Centre for Fusion, Space, and Astrophysics, Department of Physics, University of Warwick, Coventry, CV4 7AL UK.

|March 19, 2019

Summary

This summary is machine-generated.

This study analyzes solar p-mode oscillations using Global Oscillation Network Group data from two solar cycles. Mean squared velocities and energies of p-modes are anticorrelated with solar activity, while energy supply rates show no significant correlation.

Keywords:

Helioseismology, observations Oscillations, solar Solar Cycle, observations

More Related Videos

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

Published on: October 3, 2018

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Related Experiment Videos

Last Updated: Jan 27, 2026

Flash Infrared Annealing for Perovskite Solar Cell Processing

Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

In Situ Monitoring of the Accelerated Performance Degradation of Solar Cells and Modules: A Case Study for CuIn,GaSe2 Solar Cells

Published on: October 3, 2018

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Area of Science:

Heliophysics
Solar Physics
Asteroseismology

Background:

Solar p-mode oscillations are acoustic waves that travel through the Sun.
Understanding their parameters, like amplitude and damping, is crucial for studying solar activity.
Previous studies have explored temporal variations, but a comprehensive analysis across two solar cycles is needed.

Purpose of the Study:

To investigate the parameters of global solar p-mode oscillations over two solar cycles (1996-2018).
To analyze the relationship between these parameters and solar activity, specifically solar radio flux.
To expand understanding of the excitation and damping mechanisms of solar p-modes.

Main Methods:

Utilized time series data from the Global Oscillation Network Group (GONG) for harmonic degrees.
Corrected mode amplitudes for fill factor, apparent solar radius, and spurious jumps.
Analyzed mode parameters (damping width, amplitude, mean squared velocity, energy, energy supply rate) as a function of frequency and harmonic degree.

Main Results:

Activity-related changes in amplitude and damping width depend on mode frequency and harmonic degree.
Mean squared velocities and energies of p-modes are anticorrelated with solar activity, varying by 10% and 5% respectively.
Mode energy supply rates showed no significant correlation with solar activity.

Conclusions:

Solar p-mode velocities and energies decrease during periods of high solar activity.
The interplay between convection, magnetic fields, and acoustic oscillations is complex and varies with mode properties.
This research provides a robust dataset for future studies on solar interior dynamics and activity cycles.