منابع مشابه
Extended annular capillary surfaces
The height of the surface of a fluid in an annular tube is explored using a shooting method to solve a boundary value problem where the radii and the contact angles are given. The contact angles on the inner and outer tube surface need not be the same. These surfaces are then extended so that they are no longer graphs. The extended surfaces are shown to solve a boundary value problem over an an...
متن کاملImpedance of Small Obstacles and Rough Surfaces
We calculate the longitudinal impedance for small obstacles of arbitrary shape located on the surface of a round perfectly conducting pile. Calculations are carried out in a small{angle approximation that assumes a smallness of the angle between the surface of the obstacle and the unperturbed surface of the pipe. As an illustration of the accuracy of this approach, we compare the impedance of t...
متن کاملFf Ur Mathematik in Den Naturwissenschaften Leipzig Scherk-type Capillary Surfaces Scherk-type Capillary Surfaces
It is shown that with the exception of very particular cases any tubular liquid bridge con guration joining parallel plates in the absence of gravity must change dis continuously with tilting of the plates thereby proving a conjecture of Concus and Finn Phys Fluids Thus the stability criteria that have appeared previously in the literature which take no account of such tilting are to some exten...
متن کاملStepping over obstacles: attention demands and aging.
Older adults have been shown to trip on obstacles despite taking precautions to step carefully. It has been demonstrated in dual-task walking that age-related decline in cognitive and attentional mechanisms can compromise postural management. This is yet to be substantiated during obstacle negotiation when walking. Forty-six healthy volunteers (aged 20-79 years) stepped over obstacles in their ...
متن کاملCharacteristics of gait in stepping over obstacles
Human gait is precisely and continuously adapted in order to negotiate obstacles safely and without excessive modulations to lower limb trajectories. To investigate obstacle clearance, unimpaired healthy adult subjects (6 male and 6 female) were videotaped stepping over an obstacle adjusted to IO%, 25%. and 40% of leg length. Lead foot clearance was relatively uninfluenced by obstacle height wh...
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ژورنال
عنوان ژورنال: Pacific Journal of Mathematics
سال: 1985
ISSN: 0030-8730,0030-8730
DOI: 10.2140/pjm.1985.117.121