منابع مشابه
The Development of the Locust Jumping Mechanism I. Allometric Growth and Its Effect on Jumping Performance
1. The jump range of locusts of all instars varies throughout an instar, reaching a peak at apolysis in hoppers, and about 3 weeks after the final moult in adults. 2. Mature adult locusts have an escape jump range three times that of young hoppers. 3. During a period of repeated jumping, mature adults have an average jump range three times that of the hoppers. 4. Allometric growth of the metath...
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The nervous systems of animals evolved to exert dynamic control of behavior in response to the needs of the animal and changing signals from the environment. To understand the mechanisms of dynamic control, we need a means of predicting how individual neural and body elements will interact to produce the performance of the entire system. We have developed a neuromechanical application named Ani...
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A crucial stage of the locust kick motor program is the trigger activity that inhibits the flexor motorneurons at the end of flexor-extensor coactivation and releases the tibia. One source of this inhibition is the M interneuron, which produces a spike burst at the time of the trigger activity. Previous work has suggested that sensory input resulting from extensor muscle tension may contribute ...
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We study a singular limit of tumbled granular flows in quasi-two-dimensional rotating drums, demonstrating that the limiting dynamical system, as the shear layer vanishes, belongs to a class of discrete discontinuous mappings called piecewise isometries. In doing so, we identify a mechanism of mixing, in the absence of the usual streamline crossing mediated by the flowing layer. By considering ...
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ژورنال
عنوان ژورنال: Nature
سال: 1967
ISSN: 0028-0836,1476-4687
DOI: 10.1038/214939a0