# ASPECT Newsletter #160

**URL:** <https://community.geodynamics.org/t/aspect-newsletter-160/2611>\
**Category:** ASPECT\
**Created:** [October 5, 2022, 4:00pm UTC](https://community.geodynamics.org/t/aspect-newsletter-160/2611 "2022-10-05T16:00:14Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![rgassmoeller](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/rgassmoeller/32/49_2.png) [@rgassmoeller](https://community.geodynamics.org/u/rgassmoeller)\
**Post date:** [October 5, 2022, 4:00pm UTC](https://community.geodynamics.org/t/aspect-newsletter-160/2611/1 "2022-10-05T16:00:14Z")

</div>

Hello everyone!

This is ASPECT newsletter #160.  
It automatically reports recently merged features and discussions about the ASPECT mantle convection code.

Below you find a list of recently proposed or merged features:

[#4974](https://github.com/geodynamics/aspect/pull/4974): Add rk2 particle integrator first order accuracy option (implemented by [gassmoeller](https://github.com/gassmoeller))  
[#4973](https://github.com/geodynamics/aspect/pull/4973): always initialize dst vector in preconditioner (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4972](https://github.com/geodynamics/aspect/pull/4972): update jsontomarkdown script for 9.4 (implemented by [tjhei](https://github.com/tjhei); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4970](https://github.com/geodynamics/aspect/pull/4970): Add a publication. (implemented by [bangerth](https://github.com/bangerth); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4968](https://github.com/geodynamics/aspect/pull/4968): Update the default value of the Newton maximum Stokes sovler tolerance to a more conservative value. (implemented by [MFraters](https://github.com/MFraters); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4967](https://github.com/geodynamics/aspect/pull/4967): Add test files (implemented by [laila-16](https://github.com/laila-16))  
[#4966](https://github.com/geodynamics/aspect/pull/4966): GMG:clear out mg constraints [WIP] (implemented by [zjiaqi2018](https://github.com/zjiaqi2018))  
[#4965](https://github.com/geodynamics/aspect/pull/4965): Add water fugacity to diffusion creep (implemented by [danieldouglas92](https://github.com/danieldouglas92))  
[#4964](https://github.com/geodynamics/aspect/pull/4964): Publications by Weerdesteijn et al. and Liu and Yang (implemented by [ljhwang](https://github.com/ljhwang); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4963](https://github.com/geodynamics/aspect/pull/4963): Add a publication citing ASPECT. (implemented by [bangerth](https://github.com/bangerth))  
[#4962](https://github.com/geodynamics/aspect/pull/4962): GMG: rm compute\_no\_normal\_flux\_constraints\_box/shell (implemented by [zjiaqi2018](https://github.com/zjiaqi2018); reviewed by [tjhei](https://github.com/tjhei))  
[#4954](https://github.com/geodynamics/aspect/pull/4954): Also output the yield stress (implemented by [anne-glerum](https://github.com/anne-glerum); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4944](https://github.com/geodynamics/aspect/pull/4944): Docs: Sphinx conversion of several more benchmarks (implemented by [cmills1095](https://github.com/cmills1095); reviewed by [tjhei](https://github.com/tjhei))  
[#4934](https://github.com/geodynamics/aspect/pull/4934): cookbooks/initial-condition-S20RTS (implemented by [zjiaqi2018](https://github.com/zjiaqi2018); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4932](https://github.com/geodynamics/aspect/pull/4932): move composition velocity statistics from cookbook to main branch (implemented by [elodie-kendall](https://github.com/elodie-kendall); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#4922](https://github.com/geodynamics/aspect/pull/4922): Reduce gcc memory usage on deal.II development tester (implemented by [gassmoeller](https://github.com/gassmoeller); reviewed by [gassmoeller](https://github.com/gassmoeller))  
[#3903](https://github.com/geodynamics/aspect/pull/3903): Add particle property plugin CPO core (implemented by [MFraters](https://github.com/MFraters); reviewed by [gassmoeller](https://github.com/gassmoeller))

And this is a list of recently opened or closed discussions:

[#4971](https://github.com/geodynamics/aspect/issues/4971) spiegelman\_et\_al\_2016 convergence issue (opened)  
[#4969](https://github.com/geodynamics/aspect/issues/4969) Github action to build docker container occasionally cancelled (opened)  
[#4960](https://github.com/geodynamics/aspect/issues/4960) deal.II master floating point exception (opened and closed)  
[#4952](https://github.com/geodynamics/aspect/issues/4952) json to markdown for parameters demangling in 9.4 (closed)

A list of all major changes since the last release can be found at [this website](https://aspect.geodynamics.org/doc/doxygen/changes_current.html).

Thanks for being part of the community!

Let us know about questions, problems, bugs or just share your experience by visting our [forum](https://community.geodynamics.org/c/aspect), or by opening issues or pull requests on [Github](https://www.github.com/geodynamics/aspect).  
Additional information can be found at our [official website](https://aspect.geodynamics.org/), and CIG’s [ASPECT website](https://geodynamics.org/cig/software/aspect/).