Narrow Escape
The Narrow escape problem is a ubiquitous problem in biology, biophysics and cellular biology which has the following formulation: a Brownian particle (ion, molecule, or protein) is confined to a bounded domain (a compartment or a cell) by a reflecting boundary, except for a small window through which it can escape. The narrow escape problem is that of calculating the mean escape time. This time diverges as the window shrinks, thus rendering the calculation a singular perturbation problem.
Read more about this topic: Brownian Motion
Famous quotes containing the words narrow and/or escape:
“[W]e are all guilty in some Measure of the same narrow way of Thinking ... when we fancy the Customs, Dresses, and Manners of other Countries are ridiculous and extravagant, if they do not resemble those of our own.”
—Joseph Addison (1672–1719)
“Fine vapors escape from whatever is doing the living.
The night is cold and delicate and full of angels
Pounding down the living. The factories are all lit up,
The chime goes unheard.
We are together at last, though far apart.”
—John Ashbery (b. 1927)