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(a) Nondimensional Ohmic resisistance R/(aΣ) of a hole of radius a in a membrane of thickness h, as a function of h/a. Solid line, Rtot/(aΣ) computed numerically; dashed line, the approximation Rcomp/(aΣ) (14). (b) The difference (Rtot – Rcomp)/(aΣ).
