#scicomp — Public Fediverse posts

Ever wondered whether fast direct solvers are compatible with Quadrature by Expansion, a method for the evaluation of singular layer potentials? Wonder no more 🙂 In https://arxiv.org/abs/2504.13809, we offer an algorithmic recipe, analysis, an end-to-end error model, and some weighting tricks, the latter two applicable beyond QBX, along with numerical experiments. #layerpot #fastalg #fastalgorithm #numpde #numerics #scicomp #paper 🎓 📖

I'm releasing lecture slides and related demos (Jupyter notebooks) for my classes in open-source form on Github:
https://andreask.cs.illinois.edu/lecture-slides-and-demos-released-as-open-source/ 🗨️ 🎓 📖 🧑‍🏫 #teaching #scicomp #opensource #lecturenotes

The #libwebp security vulnerability might affect #ComputationalScientist:s, especially those that make their own #conda environments and process image data (via code or apps). Our blog post discusses what a #SciComp person might need to know (and if you have corrections or more suggestions, please send them our way)
https://aaltoscicomp.github.io/blog/2023/webp-security-vulnerability/

#webp #RSEng #HPC #security

Course announcement:
Need to use more computer power, but this "#linux #shell" thing holding you back? Come learn the basics of being comfortable with a #LinuxShell for basic science and data management (#bash actually, but applies to other things like #OsX and #WSL. Course is hosted for #finland, but we welcome others, too.

Online, Next week, 29-31 August (T-Th), EU afternoons: https://scicomp.aalto.fi/training/scip/linux-shell-basics-2023/
#HPC #RSEng #SciComp #course

Ever been irritated that Fast Multipole Methods require lots of special, problem-specific code for efficiency (e.g. specific to the Coulomb potential?) My student Isuru Fernando has fixed that for you: https://arxiv.org/abs/2305.17867 #fmm #paper #fastmultipole #pde #numerics #scicomp

#introduction

I'm staff at #Aalto University (FI), somewhere between computing infra (#HPC), practical #teaching and mentoring, research software engineering #RSEng, and human centered #SciComp support. Our team used to be #HPC, but now we focus on helping people do #computing - this subtle difference represents my path, too. My past lives included chemistry, chem phys, #DataSci, #NetworkScience.

Expect tech topics from a human perspective.

I'm not a twitter refugee since I was never there.