[CIG-SHORT] CIG-SHORT Digest, Vol 74, Issue 10
Romain Jolivet
rjolivet at caltech.edu
Thu Oct 25 13:11:33 PDT 2012
Hi Brad,
Thanks for the new release.
I am trying to compile it from source. There is a little bug in the configure file, I think: When spatialdata/configure checks the following command:
python sysconfig.py
it creates a sysconfig.pyc, that is not removed by the configure, so it crashes when python is called next.
There is a command `rm -rf sysconfig.py` and I added sysconfig.pyc to it. Is that correct?
Cheers,
Romain
Romain Jolivet
Postdoctoral Scholar
Geological and Planetary Sciences
California Institute of Technology, Pasadena, CA
rjolivet at caltech.edu
+1 (626) 560 6356
On Oct 25, 2012, at 12:00 PM, cig-short-request at geodynamics.org wrote:
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> Today's Topics:
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> 1. PyLith 1.8.0 released (Brad Aagaard)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 25 Oct 2012 10:26:26 -0700
> From: Brad Aagaard <baagaard at usgs.gov>
> Subject: [CIG-SHORT] PyLith 1.8.0 released
> To: cig-short at geodynamics.org, cig-all at geodynamics.org
> Message-ID: <50897642.8010906 at usgs.gov>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Greetings,
>
> I am pleased to announce the release of PyLith 1.8.0, a finite-element
> code designed to solve dynamic elastic problems and quasi-static
> viscoelastic problems in tectonic deformation.
>
> This release adds estimating the stable time step for explicit time
> stepping, adds a post-processing utility for computing the moment
> magnitude and average slip for any fault output snapshot, includes a
> couple of additional examples of CUBIT meshing techniques, fixes
> several bugs in PyLith v1.7.1 and corrects some typos in the
> manual. We strongly recommend all users of previous PyLith releases
> switch to this latest release.
>
> You can download the source code and binaries from
>
> http://geodynamics.org/cig/software/packages/short/pylith
>
> Detailed installation instructions for the binary packages are in the
> User Manual with detailed building instructions for a few platforms in
> the INSTALL file bundled with the PyLith Installer utility.
>
>
> RELEASE NOTES - PyLith v1.8.0
>
> ****************************************************************
> See the README file for changes required to switch to the v1.8.0 release
> series from previous versions.
> ****************************************************************
>
> * New features
>
> * Additional flexibility in PETSc nonlinear solver parameters
>
> The default line search type for the PETSc nonlinear (SNES) solver
> is a customized backtrace method included in PyLith. The user may
> now select alternative line search types (basic, bt, l2, cp)
> available in PETSc.
>
> * Post-processing utility pylith_eqinfo to compute slip information.
>
> This post-processing utility computes the moment magnitude,
> seismic moment, seismic potency, and average slip at
> user-specified snapshots in time from PyLith HDF5 output.
> Information is given for each fault and across all faults. See
> the Post-processing section of the manual in the Running PyLith
> chapter for more information.
>
> * Computation of the stable time step for explicit time-stepping.
>
> The stable time step for explicit time-stepping is computed based
> on the CFL condition and minimum edge lengths. For triangular and
> tetrahedral cells we also account for a reduction in the stable
> time step due to distorted cells (e.g., slivers and needles). See
> the Stable time step section in the Materials chapter of the
> manual for more information.
>
> * Output the stable time step for each cell in a material.
>
> Output cell_info_fields "stable_dt_implicit" and
> "stable_dt_explicit" can be included in material output.
>
> * Added netCDF Python module to binary distribution to provide
> Python interface to NetCDF files, including Exodus-II files. This
> is used in a new meshing example for setting the discretization
> size using an Exodus-II vertex field. Note that this required
> updating the NetCDF library.
>
> * New CUBIT meshing examples demonstrating how to merge surfaces and
> use and an Exodus-II vertex field to specify the discretization
> size.
> + examples/meshing/surface_nurbs/merge_surfs
> + examples/meshing/cubit_cellsize
>
>
> * Bug fixes
>
> - Fixed omission of synchronization of stable time step computation
> among processors. Minimum time step among all processors rather
> than local value should be used.
>
> - Fixed density scale not being set in NondimElasticQuasistatic.
> Density scale should be set based on shear modulus, length scale,
> and relaxation time.
>
> - Added warning when initial state for a fault constitutive model is
> not set. If an initial state value is not given, for rate-state
> friction using a default value of L / reference slip rate. Other
> fault constitutive models use a default value of 0.0 for initial
> state variables.
>
> - Separated tensor components in Xdmf files to avoid confusion. The
> corresponding HDF5 files remain unchanged.
>
> - Removed explicit time-stepping formulation with non-lumped
> Jacobian. This formulation was not setup properly for spontaneous
> rupture models and is too computationally expensive for practical
> problems. The ExplicitLumped* formulations are now simply Explicit*.
>
> - Fixed parallel bug that resulting in inconsistent orientation of
> fault slip directions. Flipping the fault orientation was not
> synchronized across processors. This bug would only appear when
> running in parallel with faults that change from dipping in one
> direction to dipping in the opposite direction.
>
> - Fixed bug in setting name of field in OutputSolnPoints when output
> multiple fields. This bug caused the name of the first output
> field to be used and output data to overwrite each other.
>
>
>
> ------------------------------
>
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> End of CIG-SHORT Digest, Vol 74, Issue 10
> *****************************************
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