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The Biomechanics of Insect Flight: Form, Function, Evolution
- R. Dudley
- Biology, Engineering
- 21 December 1999
The biomechanics of insect flight: form, function, evolution , The biomechanics of insect flight: form, function, evolution , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
Molecular Phylogenetics and the Diversification of Hummingbirds
PHANEROZOIC ATMOSPHERIC OXYGEN
- R. Berner, D. Beerling, R. Dudley, Jennifer M. Robinson, R. Wildman
- Environmental Science, Geography
- 28 November 2003
▪ Abstract Theoretical calculations, based on both the chemical and isotopic composition of sedimentary rocks, indicate that atmospheric O2 has varied appreciably over Phanerozoic time, with a…
Mechanics of Forward Flight in Bumblebees: II. QUASI-STEADY LIFT AND POWER REQUIREMENTS
Calculations of the mechanical power requirements of forward flight in bumblebees show that the power required to fly is independent of airspeed over a range from hovering flight to an airspeed of 4.5 ms −1.
Mechanics of Forward Flight in Bumblebees: I. Kinematics and Morphology
Using high-speed cinematography, bumblebees in free flight were filmed over a range of forward airspeeds and a technique for determining quantitatively the angle of attack of the wing was developed.
Implications of the late Palaeozoic oxygen pulse for physiology and evolution
The late Palaeozoic was marked by significant changes in atmospheric chemistry and biotic composition. Geochemical models suggest a marked increase and then decline of atmospheric oxygen and…
Limits to vertebrate locomotor energetics suggested by hummingbirds hovering in heliox
It is shown that limits to the locomotor capacity of hovering ruby-throated hummingbirds are unequivocally indicated by aerodynamic failure at low densities less than half that of sea-level air.
On the biogeography of salt limitation: A study of ant communities
- M. Kaspari, S. Yanoviak, R. Dudley
- Environmental ScienceProceedings of the National Academy of Sciences
- 18 November 2008
It is suggested that the geography of ant activity is shaped by sodium toxicity near the shore and by sodium deficit farther inland, and changing patterns of rainfall with global change may ramify through inland food webs.
An integrative approach to understanding bird origins
Recent discoveries of spectacular dinosaur fossils overwhelmingly support the hypothesis that birds are descended from maniraptoran theropod dinosaurs, and furthermore, demonstrate that distinctive bird characteristics such as feathers, flight, endothermic physiology, unique strategies for reproduction and growth, and a novel pulmonary system originated among Mesozoic terrestrial dinosaurs.
Biomechanics of Flight in Neotropical Butterflies: Morphometrics and Kinematics
- R. Dudley
- 1 May 1990
Flight speed scales with morphological parameters in general accordance with predictions based on isometric design, however, maximum positional angle and stroke amplitude tend to increase while body angle decreases with increased relative flight speed.