For POTEntial=BIHArmonic, a two-sided harmonic function is used:

where
**S** is the scale factor specified by the SCALe statement, is the
Boltzmann constant, **T** is the temperature specified by the
TEMPerature
statement,
**ceil** is specified by the CEILing statement,
**d**, , and are specified by the
ASSIgn
statement:

The distance **R** is defined in Section 18.2.
The deviation is
defined as **|R-d|**.

Sat Mar 11 09:37:37 PST 1995