1995-Mar-13
1-D version.

1995-Jun-21
2-D version.

1995-Jul-15
First 2-D runs.

1996-Jan-30
Implicit solver for diffusion/heat conduction equation.

Multidimensional problems are solved using weighted splitting (fractional steps) scheme by Yanenko (1971) which is accurate to second order in space and time. In 1-D the method reduces to Crank-Nicolson scheme. Optionally an explicit solver may be used.

1996-Feb-10
PROMETHEUS integrated with AMR (2-D).

1996-Mar-8
Parallel version for Cray PVP systems (usually it is >99% parallel but the lower limit that we can actually guarantee is 95% in 2-D; in short, there is no single number but performance is rather strongly problem dependent).

1996-Jul-20
Arbitrary Temporal Refinement (ATR).

1996-Jul-25
Consistent Multifluid Advection (CMA).

1996-Sep-25
Photoionization added.
1-D and 2-D Poisson solver.
Improved load balancing on CRAY.

1996-Nov-13
RJET integrated with AMR.

1997-Jun-20
Fixes for CMA and 1-D Poisson solver.

1997-Jul-17
2-D photoionization by central source.
Refinement criteria in case of strong composition variations.

1997-Sep-27
Fix for ATR.
Parallel version on SGI Onyx/Origin.

1997 Oct-Dec
Optimization of 1- and 2-D Poisson solvers on CRAY.
Implementation of nuclear burning.

1997-Dec-28
First draft of 3-D version.

1998-Mar-7
Fixed typo in parallel IRIX version. (kok)

1998-Mar-9
Revision of parallel version for CRAY PVP f90 compiler. (kok)

1998-Apr-09
Major revision of CMA.

1998-Apr-20
Bug fix in CMA for non-varying chemical composition.

1998-Apr-24
Clustering of patches now faster by a factor of up to 10.

1998-Apr-26
Spline option for OUT/MOV files.

1998-May-10
Time step incorrectly passed for coarsened patches when ATR is used.

1998-May-25
Back to interpolation in volume coordinate.

1998-Jun-5
Partial densities now consistently used throughout the code. (ewm/kok)

1998-Jun-19
CDM component (a la CPPA) added.

1998-Jun-21
Support for STARS (stars in fluid approximation) added.

2-D version: done.

1998-Jul-26
3-D version.

1998-Oct-10
Optimized version of interpolation procedures.

1998-Oct-27
HERAKLES joins family of solvers.

HERAKLES is our ultimate (say) hydro solver based on PROMETHEUS (a PPMDE code developed by Bruce Fryxell and Ewald Müller), and does not differ in functionality from its predecessor. HERAKLES is targeted at both superscalar (cache-oriented) and vector architectures. The code features a brand new memory management which allows to achieve optimal performance for a given (second level) cache size or number of vector registers (vector length) especially in multidimensional simulations.

1999-Jul-10
Signature-based clustering (after Berger and Rigoutsos).

1999-Sep-20
Angular momentum transport.

1999-Oct-10
Multidimensional artificial viscosity (a la sPPM).

1999-Oct-17
Thermal diffusion added.

1999-Nov-25
Isothermal version of HERAKLES.

1999-Dec-19
ATR fixes - code can now run at arbitrary fractions of nominal Courant time step on different levels.

2000-Jan-09
Level-dependent interpolation order. Second order interpolation with 4th order slopes (after Colella) added.

2000-Jan-29
Fixes for spherically symmetric Poisson solver (kok).

2000-Feb-08
Fixes near symmetry axis (cylindrical and spherical geometries).

2000-Apr
Ported to OpenMP.

2000-Oct
GENESIS special relativistic solver integrated with AMRA.

2000-Oct
AMRA paper submitted to CPC (available from astro-ph archives and AMRA paper document).