History for Bidomain

changed:
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**Purpose**:  This wiki is intended to be a collection site of changes that CMISS developers (mainly T. Austin) have made to routines employed by monodomain/bidomain problems (and coupled problems), in particular, when Grid-based FEM is employed as discretization.

* **General Parallelization** changes and New Features

  * On 22 June 05 Changed ASSEMBLE10_FE so that construction of matrix is performed in parallel.  Appears to be close to speedup of p for p processors.  Needs to be tested and then submitted.

  * Learned from above changes that ASSERT causes problems (if not carefully accounted for) for parallel runs in that it caused me grief by causing code to die.  


* **MARCH8** class of subroutine changes and new features 

  * FUTURE PLANS: Plan in the near future to add second-order time-stepping using Strang Splitting (reaction solve - diffusion solve - reaction solve).  This will require a better coding of the reaction solve in MARCH8.  


* **ASSEMBLE10** class of subroutine changes and new features

  * See OpenMP changes.

  * Also fixed change that Leo made which worked for non-lattice but not
for lattice-based.

  * FUTURE PLANS: Need to parallelize assembly routine for ASSEMBLE10_FV.

* **CALC_FE_GRID_COEF** and **CALC_FE_COEF** changes and new features.
  
  * For parallelization of assembly in ASSEMBLE10_FE I split up work 
done in CALC_FE_GRID_COEF and CALC_FE_COEF by creating CALC_FE_GRID_stncl and CALC_FE_STNCL.  These new routines are called first to set-up the stencil pattern.  Then once setup we call CALC_FE_GRID_COEF and CALC_FE_COEF to compute stencil entries.

**Note 1**: MARCH8 class of subroutines consists mainly of MARCH8, MARCH8_COUPLED, and newer subroutines, which perform time-stepping for monodomain/bidomain or m/b/torso problems.  Most routines written by M. Buist.

**Note 2**: ASSEMBLE10 class of subroutines consists of ASSEMBLE10_FE, ASSEMBLE10_FD, and ASSEMBLE10_FV.  These names were changes from ASSEMBLE10 and ASSEMBLE10_FE in order to better describe
the subroutines.