The talk focussed on ONETEP as a case study of a successful, well-written, scientific code used in materials modelling. As part of this talk, I described some general ideas related to scientific software development and proposed a few key principles which I think are vital in keeping scientific software usable and maintainable.
I have uploaded the slides for talks I presented at two recent events:
- DFT Developer Community Meeting (University College London, 9 July)
- CCP9 Young Researchers Event and Community Meeting (Park Inn Hotel, York, 18-19 July)
My talk at the DFT Developer Community Meeting focused on the DL_MG multigrid Poisson solver library, which I contribute to. The talk covered the design and implementation of the solver and its application in electronic structure calculations in vacuum and solution.
The talk at the CCP9 event was a section of a larger talk (with multiple presenters) giving a progress update on the ONETEP CCP9 flagship project. My section of the talk briefly outlined my contributions to the project so far, developing and extending hybrid and range-separated exchange-correlation functionality in ONETEP.
PDFs of the slides for both talks can be downloaded from the Work page.
On 4-5 June 2018, I attended a workshop on Debugging Numerical Software at University of Bath. The workshop featured a variety of debugging-themed talks from experienced developers of numerical software, as well as group discussion sessions and an innovative interactive “bug hunt” session.
I submitted a bug for discussion during the bug hunt session (slides and source code can be found at the public github repository created for the session). The bug was originally encountered as unexpected changes in the behaviour of Fortran code (ONETEP) when compiled with/without OpenMP support. See the slides I produced for the workshop for further information: slide 1, slide 2 (slide 2 contains some useful information about how compilers silently change how variables are allocated when OpenMP flags are used).
During the bug hunt session we were able to create a minimal working example (MWE) for my bug. This was a nice outcome, given that a MWE had proven elusive in my investigations prior to the workshop.
I have updated the brief CV and publications list in the Work page and added slides from a recent talk I gave at the “Modelling and Measuring Water in Complex Environments” symposium at the University of Southampton. The talk covered the implicit solvent model implemented in ONETEP and our recent work further extending and developing this model. It also included some examples of large-scale applications of the solvent model using ONETEP.
I have uploaded slides from a short talk I presented during the ONETEP masterclass 2017 at the University of Warwick on 01 September 2017. The talk described, in brief, the implementation of meta-GGA exchange-correlation functionals in ONETEP. Some practical information about the usage of meta-GGAs in ONETEP was also provided. The PDF can be downloaded from the Work page.
I have uploaded a poster and accompanying single slide from a “pico” talk describing my work on an ARCHER eCSE project implementing and extending an implicit solvent model in CASTEP and ONETEP. The poster and talk were presented at the CCP9 Young Researchers Meeting in Cambridge, UK. The PDFs can be downloaded from the Work page.
I have a new publication in The Journal of Chemical Physics:
J.C. Womack, N. Mardirossian, M. Head-Gordon, and C.-K. Skylaris, “Self-consistent implementation of meta-GGA functionals for the ONETEP linear-scaling electronic structure package”, J. Chem. Phys. 145, 204114 (2016).
I have just uploaded the slides from two recent talks I gave on my work implementing meta-GGAs in the ONETEP linear-scaling electronic structure code. The first talk was given at the RSC Theoretical Chemistry Group Conference in Nottingham, UK. The second was given at the 252nd ACS National Meeting & Exposition in Philadelphia, US. The PDFs can be downloaded from the Work page.