منابع مشابه
Evaluation of a Powered Ankle-Foot Prosthesis during Slope Ascent Gait
Passive prosthetic feet lack active plantarflexion and push-off power resulting in gait deviations and compensations by individuals with transtibial amputation (TTA) during slope ascent. We sought to determine the effect of active ankle plantarflexion and push-off power provided by a powered prosthetic ankle-foot (PWR) on lower extremity compensations in individuals with unilateral TTA as they ...
متن کاملTechnical Change and the Demand for Skills during the Second Industrial Revolution: Evidence from the Merchant Marine, 1891-1912*
Using a large, individual-level wage data set, we examine the impact of a major technological innovation—the steam engine—on the demand for skills in the merchant shipping industry. We find that the technical change created a new demand for engineers, a skilled occupation. It had a deskilling effect on production work— moderately skilled able-bodied seamen were replaced by unskilled engine room...
متن کاملCentral Limit Theorem in Multitype Branching Random Walk
A discrete time multitype (p-type) branching random walk on the real line R is considered. The positions of the j-type individuals in the n-th generation form a point process. The asymptotic behavior of these point processes, when the generation size tends to infinity, is studied. The central limit theorem is proved.
متن کاملLarger antelopes are sensitive to heat stress throughout all seasons but smaller antelopes only during summer in an African semi-arid environment.
Heat stress can limit the activity time budget of ungulates due to hyperthermia, which is relevant for African antelopes in ecosystems where temperature routinely increases above 40 °C. Body size influences this thermal sensitivity as large bodied ungulates have a lower surface area to volume ratio than smaller ungulates, and therefore a reduced heat dissipation capacity. We tested whether the ...
متن کاملInterpolating between random walk and rotor walk
We introduce a family of stochastic processes on the integers, depending on a parameter p ∈ [0, 1] and interpolating between the deterministic rotor walk (p = 0) and the simple random walk (p = 1/2). This p-rotor walk is not a Markov chain but it has a local Markov property: for each x ∈ Z the sequence of successive exits from x is a Markov chain. The main result of this paper identifies the sc...
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ژورنال
عنوان ژورنال: The Canadian Entomologist
سال: 1899
ISSN: 0008-347X,1918-3240
DOI: 10.4039/ent31268-9