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Related Concept Videos

Problem-Solving: Tuning of a Guitar String01:04

Problem-Solving: Tuning of a Guitar String

In the case of stringed instruments like the guitar, the elastic property that determines the speed of the sound produced is its linear mass density or the mass per unit length. This is simply called the linear density. If the string's linear density is constant along the string, then the linear density is simply the total mass divided by the total length.
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A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
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Simple Pendulum01:10

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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 phenomenon...
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The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
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Dendrochronological Dating and Provenancing of String Instruments
10:26

Dendrochronological Dating and Provenancing of String Instruments

Published on: October 6, 2022

Another string.... but no bow.

Connor Green1, Diarmuid Molony, James Cashman

  • 1Department of Trauma and Orthopaedics, Croom Orthopaedic Hospital, Co. Limerick, Ireland. connorjgreen@gmail.com

Acta Orthopaedica Belgica
|June 15, 2011
PubMed
Summary
This summary is machine-generated.

The Alexis system, a wound protector/retractor, can prevent bacterial contamination during total hip arthroplasty. This surgical device also protects skin and soft tissues from damage.

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Area of Science:

  • Surgical Innovation
  • Orthopedic Surgery
  • Infection Control

Background:

  • Intra-operative bacterial contamination poses a risk in total hip arthroplasty.
  • Protecting skin and soft tissues during surgery is crucial for patient outcomes.

Purpose of the Study:

  • To advocate for the use of the Alexis system during total hip arthroplasty.
  • To highlight the benefits of wound protector/retractors in preventing surgical site infections.

Main Methods:

  • The study is based on the authors' positive clinical experience.
  • The Alexis system was utilized during total hip arthroplasty procedures.

Main Results:

  • The Alexis system effectively prevented bacterial contamination from the skin.
  • The device successfully avoided damage to surrounding skin and soft tissues.

Conclusions:

  • The Alexis system is a valuable tool for enhancing safety in total hip arthroplasty.
  • Wound protector/retractors like the Alexis system should be considered for routine use to minimize contamination risks.