Results 251 to 260 of about 173,899 (302)

Animal aeroacoustics: Fluttering feathers and humming hummingbird wings

Journal of the Acoustical Society of America, 2016
Hummingbirds 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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Aeromechanics of Membrane Wings with Implications for Animal Flight

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
Arnold Song, Xiaodong Tian, Emily Israeli, Ricardo Galvao, Kristin Bishop, Sharon Swartz, Kenneth Breuer   +6 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, Olivier Lebeltel, Pierre Bessière   +2 more
openaire   +1 more source

Animal Farm of Indian Right Wing

2020
This article was written on the 75th anniversary of the classic work of George Orwell, Animal Farm. It was written amidst the first wave of Covid-19. There are many differences between a communist regime and a democratic system and both can't be compared directly.
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White Wings and Black Wings: Ambiguous Dichotomy in Manga and Anime

The International Journal of Diversity in Organizations, Communities, and Nations: Annual Review, 2008
The deeply intertwined dichotomy of black/evilness and white/goodness continues to have profound influences on people’s perspectives of others, often causing tangible and intangible pains to individuals and groups in many parts of the world. Because of the simplicity of the distinction such deeply metaphoric imagery can be ingeniously exploited as a ...
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Effects of aspect ratio on flapping wing aerodynamics in animal flight

Acta Mechanica Sinica, 2014
Morphology as well as kinematics is a critical determinant of performance in flapping flight. To understand the effects of the structural traits on aerodynamics of bio-flyers, three rectangular wings with aspect ratios (AR) of 1, 2, and 4 performing hovering-like sinusoidal kinematics at wingtip based Reynolds number of 5 300 are experimentally ...
Fu, Junjiang, Hefler, Csaba, Qiu, Huihe, Shyy, Wei   +3 more
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Animal-borne imaging takes wing, or the dawn of ‘wildlife video-tracking’

Trends in Ecology & Evolution, 2008
Moll and colleagues [1] presented a timely review of the use of animal-mounted video cameras for basic and applied ecological research. We welcome the authors’ attempt to unveil the scientific potential of this emerging technology, but wish to highlight new research opportunities arising from the latest work with bird-mounted cameras.
C RUTZ, L BLUFF
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“A Winged but Grounded Bird”: Morrison’s Mixed Treatment of Animality in The Bluest Eye

Society & Animals, 2021
Abstract This literary analysis of Toni Morrison’s first novel, The Bluest Eye (1970), answers the call issued by scholars in the growing interdisciplinary field of animal studies to privilege nonhuman animal others as its central analytical focus. It thus examines the productive and harmful overlaps between Black subjects and animality and determines ...
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Animal locomotion: Wing-like femoral lobes help orchid mantid nymphs glide

Current Biology
The femoral lobes of the orchid mantis give this fierce predator a flower-like appearance, but they also assist in gliding, showing that form can match function in more ways than one.
Socha, John J., Khandelwal, Pranav C.
openaire   +4 more sources

Simple equation predicts how quickly animals flap their wings

Physics World
Animals flap their wings and fins at a rate determined by the same simple mathematical expression that is valid regardless of the animal’s size or flying style.
openaire   +1 more source