Palaeobiology of the Cretaceous bird Confuciusornis : a comment on Peters & Peters (2009)
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چکیده
منابع مشابه
Cellular preservation of musculoskeletal specializations in the Cretaceous bird Confuciusornis
The hindlimb of theropod dinosaurs changed appreciably in the lineage leading to extant birds, becoming more 'crouched' in association with changes to body shape and gait dynamics. This postural evolution included anatomical changes of the foot and ankle, altering the moment arms and control of the muscles that manipulated the tarsometatarsus and digits, but the timing of these changes is unkno...
متن کاملPeters’ Anomaly
While conducting medical aid in Mozambique, a 41 year old African male presented to our eye clinic complaining of visual impairment. The male was found to have Peters' anomaly type 2, a rare congenital ocular malformation leading to sensory amblyopia and glaucoma.
متن کاملJan Peters and Jens
Reinforcement Learning is an essential ability for robots to learn new motor skills. Nevertheless, few methods scale into the domain of anthropomorphic robotics. In order to improve in terms of efficiency, the problem is reduced onto reward-weighted imitation. By doing so, we are able to generate a framework for policy learning which both unifies previous reinforcement learning approaches and a...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2010
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2009.1057