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    Home > Biochemistry News > Biotechnology News > Why are birds in the water at high speed and safe!

    Why are birds in the water at high speed and safe!

    • Last Update: 2020-09-14
    • Source: Internet
    • Author: User
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    Some seabirds can get into the water at super-high speeds without harming their necks.
    phenomenon has aroused great interest among scientists.
    , they used 3D-printed "pond goose skulls" and a rubber tube to create a simplified model to explore the secret of birds entering the water at high speed but unharmed.
    researchers simulated the goose rushing into the water, a process captured by high-speed cameras.
    as a prey, some seabirds can get into the water at speeds of up to 50 mph (about 80 km/h).
    if humans enter the water at such a high rate, they are likely to suffer severe trauma, but birds with thin necks, such as goose and ostrich, can safely complete the process.
    from Virginia Tech explains how birds complete a series of high-speed water-incoming movements.
    , an associate professor in the Department of Biomedical Engineering and Mechanics at the School of Engineering and an expert in bioflow mechanics, said: "The goose's movements are incredible! We are interested in examples like pond geese that rush into the water.
    " Jung and his collaborators studied the biometrics of the goose when it entered the water, a new study published in PNAS (see end of the paper).
    they found that the birds' slender necks were not bent by the force exerted by water due to factors such as head shape, neck length and muscle mass, and the speed at which they entered the water.
    previous studies of diving birds, which generally refer to those caught in the water for prey, have often focused on an ecological perspective, focusing on a hunt known as "diving diving."
    Jung's article is the first to explore the phenomenon of birds entering the water at high speed without injury from a physical and bioengineering mechanical point of view.
    To study the bird's body shape and neck muscles, the team used a rescued and surviving goose as the subject, and used 3D printing to replicate the Smithsonian Institution's collection of pond goose skulls to help them measure the force of the goose's skull when it entered the water.
    the head is mainly subjected to resistance when the goose is washed into the water, and the faster it enters the water, the greater the resistance.
    to analyze other factors affecting the force of birds, the researchers replaced the goose's "neck" with retractable rubber tubes and put 3D-printed cones on rubber tubes as a simplified model.
    and put the model into the pool to change the conical angle, neck length and impact speed during the experiment.
    see if the neck is bent through a high-speed camera.
    of the goose's skull allowed researchers to measure the force on the bird's head as it entered the water skillfully.
    using this simplified model, the researchers' analysis showed that the shift from straight to curved neck depended on the geometry of the head, the properties of the neck material, and the impact speed.
    at the standard impact speed, the narrow body, sharp gills and properly lengthd neck keep the resistance within safe limits.
    Jung explains: "The head shape of the goose is special, which makes it less water-in-the-water resistance than other birds in the same species.
    ", the goose extends the S-shaped neck through the contraction of the neck muscles before entering the water, further reducing the risk of neck bending.
    , the team has extended the work to other species.
    Jung said the study had some inspiration for safety practices for human divers.
    man has no advantage over the goose.
    the sharp gills and slender necks of birds, the plane formed by the human foot increases the impact force when in contact with the surface of the water.
    strength is strong enough to cause fractures and damage to tissue organs.
    , sports such as cliff diving and high-bridge diving are becoming increasingly popular, and bioflow mechanics can help divers determine maximum safety heights to minimize the risk of injury.
    Jung and Chang also applied their research to underwater propulsion automatic sensors based on goose, developed in cooperation with Virginia Tech's advanced design team.
    source: Scientific Circle.
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