Release 0.1 beta (5962) 20 November 2008

• Bugfixes/Improvements
  • New feature: Can read finite element meshes produced with Gmsh using the new --gmsh switch for the nmeshimport tool. (5924)
  • Added more regression tests
  • Fixed bug that stopped simulations where two magnetic materials (each defined as a different region in the mesh) touch each other (5886)
  • Fixed bug that didn't allow to have different (potentially unrelated) simulation objects in the same nmag-program (5956)
  • Fixed bug that (sometimes) stopped the --restart mechanism to continue interrupted hysteresis loop calculations (5907)
  • Fixed bug that prevented sim.get_subfield_positions and sim.get_subfield_sites() from working. (5933)

Release 0.1 beta (5878) 13 October 2008

• Bugfixes/Improvements

  • bugfix: reinitialisation used to reset the stage_time and stage_step counters. This is now fixed and is done explicitly in the hysteresis method. This functionality is needed to study systems where the applied field changes in time (5848).
  • bugfix: allow from source compilation on (K)Ubuntu 8.04. The bug is with the Petsc library 2.3.2. We have upgraded the Petsc library to 2.3.3 in the compile from source installation, which resolves the problem (5851).
  • bugfix: reading Gambit meshes works without warnings (5852).
  • bugfix: A missing .petsc file in the user's home directory resulted in an error message when nsim was started. This did create the missing file, so all is fine the next time nsim is called. Revision (5853) fixes this.
  • Improvement: Split hysteresis example in tutorial into two examples. The first can be used to play around with thecommand andto quickly complete a simulation. The second allows to compare the resulting hysteresis loop with an analytical prediction (5876).
  • minor improvements in makefile for installation from source (5859).

• Interface changes

  None.

Release 0.1 beta (5834) 2 September 2008

• Bugfixes/Improvements/New Features

  • bugfix: disabled diagnostic debug code that caused segfault for large meshes (approximately over 130,000 volume elements)
  • bugfix: including documentation for Simulation.get_subfield_average() in manual
  • nmeshipmort has slightly improved error reporting when attempting to import an unknown mesh format

• Interface changes

  None.

Release 0.1 beta (5787) 8 August 2008

• Bugfixes/Improvements/New Features
  • We have a new distribution mode using VMWare's vmplayer. This is particularly attractive to MS Windows users. This is at a very early stage and and we invite feedback from early adaptors (see installation Method D).
  • Updated the Knoppix CD to the most recent version (installation Method C). Also included Netgen, a mesh generator, in the CD image.
  • ncol can now process OOMMF's odt files (use --odt switch)
  • Bugfix: the previous debian package could only execute on CPUs with sse2 extension.
  • Bugfix: fixed embarrassing bug that appeared with the last release (printing of applied field brakes when first component is zero).
• Interface change
  • removed support for thermal fluctuations. There appeared to be no up-take of this feature, and maintaining this (while developing the code further, parallelising it and making faster and leaner) was unnecessarily binding resources.

Release 0.1 beta (5734) 1 August 2008

• Bug fixes/Improvements/New Features

  • Reduced memory requirements by approximately 20% (due to better compression of sparse matrices)
  • Updated code working with hdf5 files to be compatible with pytables version 1 and 2 (no immediate effect on user if using compile from source, but allows to link to existing pytables2). By default we are still using pytables1 (but expect to switch at some point in the future, which should be transparent to users).
  • Change from numpy 1.0.1 to 1.1.0. in compile from source distribution.
  • More detailed progress reporting in nmagpp (useful if data files become large, i.e. a GB and more).
  • More detailed progress report in setup phase.
  • More detailed progress reporting in hysterises/relax commands.
  • Made compile from source work for Mac OS X 10.5 (Leopard)
  • Introduced unit and regression tests.

• Interface changes

  (None)

Release 0.1 beta (5531) 2 June 2008

• Bug fixes/Improvements/New Features

  • The current release, distribution mode, svn release number and location of the nmag-python libraries are provided (to stdout and logfile) when a simulation object is created.
  • Re-designed and implemented calculation of the Jacobi matrix: The new approach
    • slightly more computation time is spent during the main simulation whenever the Jacobian needs to be re-computed
    • the setup phase takes (notably) less time.
    • simulations with the new approach need about 30% less memory
  • Matrix setup is now parallised.
  • Documented the use of MPI in the manual to carry out parallel runs.
  • Bugfix: Code now working with MPICH2.
  • Bugfix: The compilation from source works (again) for Mac OS X.
  • Switched to pvode (the parallel solver for time integration) by default. Updated timestepper tolerances section accordingly.
  • Feature enhancement: can save spatially resolved fields using the save_data command in any order (previsouly, it was possible to stick to the same set of saved fields for every saved timestep).
  • Update of manual in several places (including recommendation how to cite nmag in FAQ).
  • A number of (smaller) bugfixes.

• Interface changes

  • The use of row for the analysis of nmag's _dat.h5 data files has been superseeded with the use of ids (see explanation in manual).

    This has the following side effect: the nmagpp command labels vtk file using the mask NAME-00XX.vtk where XX is an increasing number. This used to be the 'row' number for saved fields. Because it is now possible to save any fields in any order, the value of XX is now replaced with the unique id of a saved configuration. This also allows easier identification of a saved configuration with an entry in the ndt file (via the id).

  • nmagpp used to have a switch --field which allowed to choose one field that should be dumped (--dump) or converted to vtk files (--vtk). The functionality has now been extended so that a list of fields can be given, such as nmagpp --fields m,phi,H_demag --vtk myvtkfiles.vtk mysimulation_dat.h5. Consequently, the switch has been renamed from --field to --fields.

Release 0.1 beta (5282) 5 February 2008

• Interface changes
  • Have changed version of petsc in tarball distribution. Used to be 2.3.1 and is now 2.3.2. (to be consistent with debian packages). Users who have older tarballs, need to obtain a new tarball to update (updating the nsim-core is not sufficient).
• Bug fixes/Improvements
  • The change in the petsc version increases the setup phase significantly (for installations from source).

Release 0.1 beta (5274) 3 February 2008

• As 0.1 beta (5259) but with working debian package.

Release 0.1 beta (5259) 30 January 2008

• Bug fixes/Improvements

  • ticket 126: Calculation of exchange energy, demag energy, Zeeman energy and total energy had wrong sign; now working correctly.
  • increased speed of setup phase slightly.
  • decreased memory usage for runs with anisotropy.

• Interface changes

  • Have changed version of mpich in tarball distribution. Used to be mpich2.0 but is mpich1.0 from now on (to be consistent with debian packages). Users who have older tarballs and want to use MPI execution, need to obtain a new tarball to update (updating the nsim-core is not sufficient).

• New features

  None

Note: there is no debian package for this release.

Release 0.1 beta (4947) 20 December 2007

• Bug fixes/Improvements

  • resolved ticket 101: Setting anisotropy=nmag.uniaxial_anisotropy(K1=0) in MagMaterial produces an error message;
  • resolved ticket 103: When starting from a zero torque configuration the simulation proceeds up to the maximum time (which is 1 s) and here it stops: now an appropriate error message is displayed.
  • resolved ticket 97: Unrecognised architecture causes compilation failure in the bem3d module: now the architecture flag will be empty if the architecture detection fails.
  • reduced setup speed by approximately a factor 2
  • added new section on sundials tolerances in manual (guided tour)

• Interface changes

  None.

• New features

  • Writing sundials performance data in log file (_cvode.log)

Release 0.1 beta (5274) 3 February 2008

• As 0.1 beta (5259) but with working debian package.

Release 0.1 beta (5259) 30 January 2008

• Bug fixes/Improvements

  • ticket 126: Calculation of exchange energy, demag energy, Zeeman energy and total energy had wrong sign; now working correctly.
  • increased speed of setup phase slightly.
  • decreased memory usage for runs with anisotropy.

• Interface changes

  • Have changed version of mpich in tarball distribution. Used to be mpich2.0 but is mpich1.0 from now on (to be consistent with debian packages). Users who have older tarballs and want to use MPI execution, need to obtain a new tarball to update (updating the nsim-core is not sufficient).

• New features

  None

Note: there is no debian package for this release.

Release 0.1 beta (4947) 20 December 2007

• Bug fixes/Improvements

  • resolved ticket 101: Setting anisotropy=nmag.uniaxial_anisotropy(K1=0) in MagMaterial produces an error message;
  • resolved ticket 103: When starting from a zero torque configuration the simulation proceeds up to the maximum time (which is 1 s) and here it stops: now an appropriate error message is displayed.
  • resolved ticket 97: Unrecognised architecture causes compilation failure in the bem3d module: now the architecture flag will be empty if the architecture detection fails.
  • reduced setup speed by approximately a factor 2
  • added new section on sundials tolerances in manual (guided tour)

• Interface changes

  None.

• New features

  • Writing sundials performance data in log file (_cvode.log)

Release 0.1 beta (4785) 27 November 2007

• Bug fixes/Improvements

  • improved renderening of bitmaps (figures and equations) in html documentation
  • install from tar ball was broken (pkgs in wrong directory)

• Interface changes

  None.

• New features

  • added mini tutorial on micromagnetic simulations to manual
  • new tool nmeshsort

Release 0.1 beta (4625) 02 November 2007

First release.