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Related Concept Videos

Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

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Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
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Wind Turbine Machine Models01:24

Wind Turbine Machine Models

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In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
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Drag Force and Terminal Speed01:18

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An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
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Survival Tree01:19

Survival Tree

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Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
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Speed of Sound in Gases01:08

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The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly compressible. Hence, sound waves travel slowly through gases. Thermodynamics helps us understand the relationship between pressure, volume, and temperature of gases, thus, the speed of sound in an ideal gas can be determined using the laws of thermodynamics. At the same time, Newton's laws of motion and the continuity equation of fluid dynamics also come...
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Related Experiment Video

Updated: Mar 10, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems
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Publisher's Note: Critical wind speed at which trees break [Phys. Rev. E 93, 023001 (2016)].

E Virot, A Ponomarenko, É Dehandschoewercker

    Physical Review. E
    |December 15, 2016
    PubMed
    Summary

    This study corrects a previously published article DOI. The correction ensures accurate citation and retrieval of scientific research.

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    Area of Science:

    • Physics
    • Physical Review E

    Context:

    • Correction of a specific article DOI.
    • Ensuring accurate scientific record-keeping.

    Purpose:

    • To rectify an error in the Digital Object Identifier (DOI).
    • To facilitate correct referencing and access to the research.

    Summary:

    • The article DOI 10.1103/PhysRevE.93.023001 has been corrected.
    • This ensures the integrity of the scientific literature.

    Impact:

    • Improved discoverability of the corrected article.
    • Maintained accuracy in scientific databases and citation indexes.