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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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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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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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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.
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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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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
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Related Experiment Video

Updated: Jan 23, 2026

Isolation, Culture, and Characterization of Primary Dermal Fibroblasts from Human Keloid Tissue
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[Keloid treatment : Where do we stand ?]

Ilias G Petrou1, Eva Meia Rüegg1, Ali Modarressi1

  • 1Service de chirurgie plastique, reconstructive et esthétique, HUG, 1211 Genève 14.

Revue Medicale Suisse
|June 14, 2019
PubMed
Summary
This summary is machine-generated.

Keloids are problematic skin lesions that grow beyond wounds, causing pain and itching. Current treatments lack consensus, and recurrence is common, necessitating combined therapeutic strategies.

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Area of Science:

  • Dermatology
  • Wound Healing Research

Background:

  • Keloids are abnormal scars extending beyond wound borders.
  • They cause significant discomfort, including pain and itching.
  • Pathophysiology is not fully understood, with multiple contributing factors.

Purpose of the Study:

  • To present a therapeutic strategy for managing keloids.
  • To address the challenges posed by keloid recurrence.
  • To offer insights into institutional approaches for problematic keloid lesions.

Main Methods:

  • Review of institutional therapeutic strategies for keloid management.
  • Discussion of invasive and non-invasive treatment options.
  • Emphasis on combination therapy due to high recurrence rates.

Main Results:

  • Keloid management remains challenging with no universally satisfactory method.
  • High risk of recurrence necessitates multimodal treatment approaches.
  • The presented strategy aims to optimize outcomes for difficult keloid cases.

Conclusions:

  • Keloid treatment requires a comprehensive approach.
  • Combination therapy is often necessary to mitigate recurrence.
  • The institutional strategy provides a framework for managing these debilitating lesions.