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Angle of Twist: Problem Solving

Angle of Twist: Problem Solving

An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque...

Angle of Twist - Elastic Range

Angle of Twist - Elastic Range

Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...

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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

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Four-Step Spreader Flap: The Pull-Twist-Turn Technique.

Rod J Rohrich¹, Paul D Durand¹

¹From the Dallas Plastic Surgery Institute; and Careaga Plastic Surgery.

Plastic and Reconstructive Surgery

|February 23, 2021

Summary

This summary is machine-generated.

The spreader flap provides a new surgical method for nasal reconstruction after dorsal hump reduction. This technique helps maintain nasal structure and breathing function, preventing deformities like the inverted-V.

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Area of Science:

Rhinologic and reconstructive surgery
Plastic and reconstructive surgery

Background:

Aggressive dorsal hump reduction can lead to nasal deformities such as inverted-V deformity, dorsal narrowing, and saddle-nose.
Preserving internal valve function is crucial after dorsal midvault reconstruction.

Purpose of the Study:

To present a novel four-step spreader flap technique for nasal reconstruction.
To demonstrate the efficacy of the spreader flap in shaping the dorsal midvault and preserving internal valve function.

Main Methods:

Description of a four-step spreader flap surgical technique.
Application of the technique in cases requiring dorsal midvault reconstruction.

Main Results:

The spreader flap serves as an effective alternative to traditional spreader grafts.
The technique allows for reproducible shaping of the dorsal midvault.
Internal valve function is successfully preserved post-operatively.

Conclusions:

The four-step spreader flap technique is a simple and reproducible method for dorsal midvault reconstruction.
This technique effectively addresses potential deformities following dorsal hump reduction.
It offers a valuable option for preserving nasal function and aesthetics.