Related Experiment Video
Updated: Aug 18, 2026

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
Published on: May 26, 2021
Criteria for evaluation of universal formulas for percolation thresholds
John C Wierman1, Dora Passen Naor
1Mathematical Sciences Department, 104 Whitehead Hall, Johns Hopkins University, Baltimore, MD 21218, USA.
Abstract:
Several universal formulas that predict approximate values for percolation thresholds of all periodic graphs have been proposed in the physics and engineering literature. The existing universal formulas have been found to have substantial errors in their predictions for some lattices. This paper proposes a set of desirable criteria for universal formulas to satisfy, and investigates which criteria are satisfied by two bond threshold formulas and two site threshold formulas most cited in the literature. The analysis is limited to lattices in two dimensions.
Related Concept Videos
Fundamental Theorem of Calculus I: Problem Solving
Area Problem
The Buckingham Pi Theorem
Uniform Depth Channel Flow: Problem Solving
Major Losses in Pipes
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
The Squeeze Theorem

