This package implements the pressure correction to the barostat as
outlined in:

N. J. H. Dunn and W. G. Noid, "Bottom-up coarse-grained models that
accurately describe the structure, pressure, and compressibility of
molecular liquids," J. Chem. Phys. 143, 243148 (2015).

doi: 10.1063/1.4937383

The BOCS package in LAMMPS is part of the BOCS software package:
https://github.com/noid-group/BOCS

See the following reference for information about the entire package:

Dunn, NJH; Lebold, KM; DeLyser, MR; Rudzinski, JF; Noid, WG.
"BOCS: Bottom-Up Open-Source Coarse-Graining Software."
J. Phys. Chem. B. 122, 13, 3363-3377 (2018).

The package also includes a pair_style that flexibly defines interactions
as a function of the local density and/or gradient of the local density
around a central particle.  Its per-atom local-density data can be written
out with "fix pair" in a form that is compatible with the Bottom-up
Open-source Coarse-graining Software (BOCS), an external coarse-graining
package that can be used to parameterize such potentials from atomistic
simulation data. Please see the following references for details:

Michael R. DeLyser and W. G. Noid (2019). "Analysis of local density potentials" The
Journal of Chemical Physics 151, : 224106 DOI: 10.1063/1.5128665

Michael R. DeLyser and W. G. Noid (2021) "Coarse-grained models for
local density gradients" The Journal of Chemical Physics, 156, 034106
DOI: 10.1063/5.0075291

Example inputs are in the examples/PACKAGES/bocs folder.
