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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

Modes of Standing Waves - I

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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

Modes of Standing Waves: II

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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

Standing Waves in a Cavity

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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

Standing Electromagnetic Waves

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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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Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

Matrix-Assisted Laser Desorption Ionization (MALDI)

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
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Related Experiment Video

Updated: Feb 8, 2026

Enucleation of the Prostate for the Treatment of Benign Prostatic Hyperplasia Using a 980 nm Diode Laser
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Enucleation of the Prostate for the Treatment of Benign Prostatic Hyperplasia Using a 980 nm Diode Laser

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[Where do we stand with benign prostatic hyperplasia day-case surgery: A laser effect?]

L Gury1, G Robert1, H Bensadoun1

  • 1Service d'urologie, CHU de Bordeaux, université de Bordeaux, 33000 Bordeaux, France.

Progres En Urologie : Journal De L'Association Francaise D'Urologie Et De La Societe Francaise D'Urologie
|June 17, 2018
PubMed
Summary

Day-case surgery for Benign Prostatic Hyperplasia (BPH) has significantly increased, driven by laser techniques. This trend is expected to continue as laser surgery becomes more widespread.

Keywords:
AmbulatoireAmbulatoryBenign prostatic hyperplasiaDay-caseHyperplasie bénigne de la prostateLaser

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Surgical Treatment for Benign Prostatic Hyperplasia: Holmium Laser Enucleation of the Prostate HoLEP.
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Surgical Treatment for Benign Prostatic Hyperplasia: Holmium Laser Enucleation of the Prostate HoLEP.

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Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia
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Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia

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Related Experiment Videos

Last Updated: Feb 8, 2026

Enucleation of the Prostate for the Treatment of Benign Prostatic Hyperplasia Using a 980 nm Diode Laser
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Surgical Treatment for Benign Prostatic Hyperplasia: Holmium Laser Enucleation of the Prostate HoLEP.
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Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia
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Area of Science:

  • Urology
  • Surgical Innovation
  • Health Services Research

Background:

  • Benign Prostatic Hyperplasia (BPH) day-case surgery feasibility is established but its adoption remains low.
  • Understanding the evolution of BPH day-case surgery is crucial for optimizing patient care and resource allocation.

Purpose of the Study:

  • To analyze the trends in Benign Prostatic Hyperplasia (BPH) day-case surgery in France.
  • To investigate the impact of surgical techniques, particularly laser surgery, on the adoption of BPH day-case procedures.

Main Methods:

  • Retrospective analysis of French national hospital discharge data (PMSI) from 2010 to 2016.
  • Inclusion of patients undergoing transurethral prostatectomy for BPH (ICD-10 codes N40, D291).
  • Analysis of day-case rates and length of stay, differentiating laser (JGFE365, JGNE171) from non-laser (JGFE023) procedures from March 2016.

Main Results:

  • BPH day-case surgeries represented 2.7% of 328,781 total procedures from 2010-2016.
  • Average length of stay decreased from 5.78 to 4.29 days during the study period.
  • Day-case procedures surged from 0.03% in 2010 to 5.63% in 2016, with 92.7% utilizing laser techniques in late 2016.

Conclusions:

  • The rise in BPH day-case surgery is strongly correlated with the introduction and adoption of laser surgical technologies.
  • Continued growth in BPH day-case procedures is anticipated due to the increasing prevalence of laser surgery.