BIRD MUSCLE POWER NOT LIMITED SOLELY BY WINGBEAT FREQUENCY
نویسندگان
چکیده
منابع مشابه
Formulae for Insect Wingbeat Frequency
A formula is developed connecting the wingbeat frequency of insects with their masses and wing areas. It is derived first theoretically, using dimensional analysis, and then it is compared with published measurements. The formula discovered involves two parameters which dimensional analysis alone cannot determine. One of these is evaluated using one among many proposed semi-empirical relationsh...
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Wingbeat frequency (f(w)) and amplitude (theta;(w)) were measured for 23 species of Australian bat, representing two sub-orders and six families. Maximum values were between 4 and 13 Hz for f(w), and between 90 and 150 degrees for theta;(w), depending on the species. Wingbeat frequency for each species was found to vary only slightly with flight speed over the lower half of the speed range. At ...
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The discovery of the ob-gene product leptin in 1994 (1 –2) and the subsequent identification of grossly obese children lacking leptin (3) or its receptor (4) considerably increased the expectation of finding an effective cure for grossly obese humans. Very soon after its discovery it became evident, however, that a deficiency of leptin did not account for obesity in the large majority of patien...
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The ability to fly opens up ecological opportunities but flight mechanics and muscle energetics impose constraints, one of which is that the maximum body size must be kept below a rather low limit. The muscle power available for flight increases in proportion to flight muscle mass and wingbeat frequency. The maximum wingbeat frequency attainable among increasingly large animals decreases faster...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2011
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.054932