Results 271 to 280 of about 3,340,625 (336)
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AIAA Journal, 2008
Bats and other flying mammals are distinguished by thin, compliant membrane wings. In an effort to understand the dependence of aerodynamic performance on membrane compliancy, wind-tunnel tests of low-aspect-ratio, compliant wings were conducted for Reynolds numbers in the range of 0.7-2.0 x 10 5 . The lift and drag coefficients were measured for wings
K. Breuer
semanticscholar +2 more sources
Bats and other flying mammals are distinguished by thin, compliant membrane wings. In an effort to understand the dependence of aerodynamic performance on membrane compliancy, wind-tunnel tests of low-aspect-ratio, compliant wings were conducted for Reynolds numbers in the range of 0.7-2.0 x 10 5 . The lift and drag coefficients were measured for wings
K. Breuer
semanticscholar +2 more sources
Whiskers, Tails, & Wings: Animal Folktales from Mexico by Judy Goldman (review)
Bulletin of the Center for Children's Books, 2013J. Hulick
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Relatively large wings facilitate life at higher elevations among Nearctic dragonflies.
Journal of Animal Ecology, 2023Determining which traits allow species to live at higher elevations is essential to understanding the forces that shape montane biodiversity. For the many animals that rely on flight for locomotion, a long-standing hypothesis is that species with ...
M. P. Moore, F. Khan
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On dissecting the wakes of flapping wings
The Physics of Fluids, 2023Flapping is an energy-demanding mode of fast animal locomotion that requires physiology, wing kinematics, and unsteady mechanics to work in unison. The trailing flow or wake is a signature of flapping mechanics, which makes it a popular candidate for ...
Priyam Chakraborty +2 more
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The Aero-Mechanics of Low Aspect Ratio Compliant Membrane Wings, with Applications to Animal Flight
46th AIAA Aerospace Sciences Meeting and Exhibit, 2008A. Song +6 more
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Ancient Wings: animating the evolution of butterfly wing patterns
Biosystems, 2003Character optimization methods can be used to reconstruct ancestral states at the internal nodes of phylogenetic trees. However, seldom are these ancestral states visualized collectively. Ancient Wings is a computer program that provides a novel method of visualizing the evolution of several morphological traits simultaneously.
Samuel, Arbesman +2 more
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Animal aeroacoustics: Fluttering feathers and humming hummingbird wings
Journal of the Acoustical Society of America, 2016Hummingbirds are so-named for the humming sounds their wings produce in flight. We review prior research on aerodynamic mechanisms that produce hummingbird wing sounds, such as aeroelastic flutter. We then present a new aeroacoustic model of the humming of hummingbird wings.
Christopher J. Clark, Emily Mistick
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On the fracture resistance of dragonfly wings.
Journal of The Mechanical Behavior of Biomedical Materials, 2019The biological success of insects is attributed to evolution of their wings. Over 400 million years of evolution, insect wings have become one of the most complex and adaptive locomotor structures in the animal kingdom.
J. Rudolf +3 more
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Wings were not designed to let animals fly
1998“Functional change in structural continuity,” i.e., the opportunistic evolution of functions together with structures, is a major feature of biological evolution. However it has seldom struck a robotician's mind as very relevant for building robots, i.e., for design. This paper proposes starting points for investigating this unusual issue.
Eric Dedieu +2 more
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