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Related Concept Videos

Standing Waves01:17

Standing Waves

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Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
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Modes of Standing Waves - I01:03

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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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Modes of Standing Waves: II01:04

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The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
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Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Standing Electromagnetic Waves01:15

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Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
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CRISPR01:59

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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Related Experiment Video

Updated: Feb 9, 2026

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands
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Stand and Move at Work.

Gabrielle Choonoo1, Mitzi Boardman1

  • 1Oregon Health and Science University, Portland, Oregon.

AMIA ... Annual Symposium Proceedings. AMIA Symposium
|June 2, 2018
PubMed
Summary
This summary is machine-generated.

Minimal physical activity, like standing and moving, can reduce cardiovascular disease and diabetes biomarkers. Researchers developed a data pipeline to identify effective prompts for encouraging standing and moving behaviors in sedentary individuals.

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Area of Science:

  • Public Health
  • Biomedical Engineering
  • Behavioral Science

Background:

  • Cardiovascular disease and diabetes are major public health issues in the US.
  • Inspiring lifestyle changes in sedentary individuals is a significant challenge for healthcare practitioners.
  • Emerging evidence suggests minimal physical activity can positively impact disease biomarkers.

Purpose of the Study:

  • To investigate methods for inspiring individuals and populations to increase standing and moving behaviors, particularly in the workplace.
  • To develop and utilize a data processing and analysis pipeline to identify effective prompts for eliciting standing and moving behavior.

Main Methods:

  • Leveraged subject-generated postural data collected by researchers.
  • Developed a computational pipeline to process and analyze movement patterns in relation to received prompts.
  • Focused on identifying the most effective prompts for encouraging standing and moving.

Main Results:

  • The pipeline provides researchers with interactive data visualization tools.
  • The pipeline aids in informing statistical analyses of movement and prompt data.
  • Identified specific prompts that are more effective in eliciting standing and moving behaviors.

Conclusions:

  • The developed pipeline supports research into behavioral interventions for sedentary populations.
  • Future applications include clinical decision support, patient monitoring, and treatment evaluation by integrating postural data with Electronic Health Records (EHR).
  • The focus is on enhancing clinical care through data integration within traditional healthcare settings.