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Related Concept Videos

Introduction to Horizontal Curves01:19

Introduction to Horizontal Curves

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Horizontal curves are essential in highway and railroad design, ensuring smooth and safe transitions between straight path segments, or tangents. These curves allow vehicles to maintain speed without abrupt changes, minimizing accidents and improving travel efficiency.A horizontal curve is typically defined by its geometric relationship to two tangents that meet at an intersection point (P.I.), where a simple curve is introduced to connect them. The back tangent refers to the initial tangent...
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Horizontal Curve: Problem Solving01:03

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A horizontal curve is characterized by its radius, intersection angle, and stationing of key points. In this case, the radius is 400 meters, and the angle of intersection is 30 degrees, with the station of the point of curvature (P.C.) at 0 + 150 meters. The goal is to determine the station values at the point of intersection (P.I.), point of tangency (P.T.), and midpoint of the curve, as well as the length of the long chord.The process begins with calculating the tangent distance (T) and the...
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Horizontal Gene Transfer01:27

Horizontal Gene Transfer

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Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
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Shear on the Horizontal Face of a Beam Element01:16

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To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's...
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Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
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Unless individual gases chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each gas in a mixture exerts the same pressure that it would exert if it were present alone in the container. The pressure exerted by each individual gas in a mixture is called its partial pressure.
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Open partial horizontal laryngectomy using CO2 fiber laser.

Erika Crosetti1, Marco Fantini2, Elena Maldi3

  • 1Head Neck Oncology Unit, Candiolo Cancer Institute, FPO IRCCS, Candiolo, Italy.

Head & Neck
|May 9, 2019
PubMed
Summary
This summary is machine-generated.

Carbon dioxide (CO2) fiber laser technology enhances open partial horizontal laryngectomies (OPHLs) by improving resection accuracy and reducing tissue damage. This leads to faster recovery and better laryngeal function post-surgery.

Keywords:
CO2 fiber laserOPHLlaryngeal cancerlaryngectomyopen partial laryngectomy

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Area of Science:

  • Otolaryngology
  • Surgical Technology
  • Laser Medicine

Background:

  • The integration of CO2 fiber laser technology is creating new possibilities in Ear, Nose, and Throat (ENT) surgery.
  • Both endoscopic and open surgical techniques can benefit from this advanced laser application.

Purpose of the Study:

  • To demonstrate the utility of CO2 fiber laser in open partial horizontal laryngectomies (OPHLs).
  • To highlight the benefits of CO2 fiber laser for precise tissue resection and improved surgical outcomes.

Main Methods:

  • The study presents three case examples of OPHLs.
  • CO2 fiber laser was utilized for the resection phase in all procedures.

Main Results:

  • CO2 fiber laser application improved resection accuracy and surgical margin quality.
  • Minimal thermal damage to surrounding tissues resulted in reduced postoperative edema.
  • Patients experienced a rapid recovery of laryngeal function.

Conclusions:

  • CO2 fiber laser offers high cutting precision with minimal tissue damage for OPHLs.
  • Non-contact energy delivery and a modulable power setting enhance surgical control.
  • The maneuverability of the fiber holder allows for highly accurate, precise "drawn" resections.