About Me (original) (raw)

I am a Senior AI Accelerator Engineer at Openchipand first chair of suckless.org e.V.

Projects

• core lightweight Linux userspace foundation
• farbfeld simple lossless raster image format for image processing
• libgrapheme lightweight Unicode text processing library
• libposit Posit arithmetic C99 implementation
• libtakum Takum arithmetic C99 reference implementation
• Posits.jl libposit bindings for Julia
• Takums.jl libtakum bindings for Julia
• quark minimal static web server

Publications

• Numerical Performance of the Implicitly Restarted Arnoldi Method in OFP8, Bfloat16, Posit, and Takum Arithmetics, with James Quinlan and Stefan Wesner, accepted at The International Conference for High Performance, Computing, Networking, Storage, and Analysis 2025 (SC 2025), St. Louis, MO, USA. preprint.
• Spectral Methods via FFTs in Emerging Machine Number Formats: OFP8, Bfloat16, Posit, and Takum Arithmetics, with John Gustafson, preprint, 2025.
• Evaluation of Bfloat16, Posit, and Takum Arithmetics in Sparse Linear Solvers, with James Quinlan, 2025 IEEE 32nd Symposium on Computer Arithmetic (ARITH). open peer review
• Integer Representations in IEEE 754, Posit, and Takum Arithmetics, submitted preprint, 2024-12-28.
• Design and Implementation of a Takum Arithmetic Hardware Codec in VHDL, submitted preprint, 2024-12-28.
• An Exascale Slurm Testing and Evaluation Environment Utilising Generated DAG Workloads, with Stefan Wesner, 5th ISC HPC International Workshop on “Monitoring & Operational Data Analytics”, Hamburg, Germany, Lecture Notes in Computer Science (LNCS,volume 15058), 2024-12-14. talk 2024-05-16.
• Beating Posits at Their Own Game: Takum Arithmetic, Conference for Next Generation Arithmetic (CoNGA) 2024, Sydney, Australie, Lecture Notes in Computer Science (LNCS,volume 14666), 2024-10-17. preprint talk 2024-02-20.
• Job Level Communication-Avoiding Detection and Correction of Silent Data Corruption in HPC Applications, with Stefan Wesner, SC ‘23: International Conference for High Performance Computing, Networking, Storage and Analysis, Denver, Colorado, USA, 2023-11. poster summary.
• Intersectionless Envelope Estimation for EMD, in Workshop Report 55/2021 ‘Applied Harmonic Analysis and Data Science’, Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany, pages 40-43, 2021-12-04.
• Modern Methods for Signal Analysis: Empirical Mode Decomposition Theory and Hybrid Operator-Based Methods Using B-Splines. Master’s thesis, Mathematical Institute, University of Cologne, Cologne, Germany, 2019-05-27, revised 2020-03-11. talk 2018-10-29.
• Generating Simple Givens Rotation Examples with Odd Perfect Squares. Mathematical Institute, University of Cologne, Cologne, Germany, 2018-03-28.
• Anonymity Networks. Mathematical Institute, University of Cologne, Cologne, Germany, 2017-07-04.
• The Unum Number Format: Mathematical Foundations, Implementation and Comparison to IEEE 754 Floating-Point Numbers. Bachelor’s thesis, Mathematical Institute, University of Cologne, Cologne, Germany, 2016-11-08.
• Dualität bei konvexer Optimierung. Mathematical Institute, University of Cologne, Cologne, Germany, 2016-05-10.
• Verfahren zur synthetischen Darstellung von Nitriersäure aus Kupfersulfat-Pentahydrat und Natriumnitrat. Käthe-Kollwitz-Gymnasium, Wesseling, Germany, 2012-03-30.

Talks

• Takum: A New Tapered Precision Machine Number Format, NEC User Group (NUG) Meeting, Hamburg, Germany, 2024-07-25.
• Intersectionless Envelope Estimation for EMD, Oberwolfach Workshop 2148 ‘Applied Harmonic Analysis and Data Science’, Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany, 2021-12-02.
• Reflections on Unicode. slcon 2019, Bad Liebenzell, Germany, 2019-10-06.
• The Static Web. slcon 2019, Bad Liebenzell, Germany, 2019-10-05.
• OpenBSD supremacy. slcon 2019, Bad Liebenzell, Germany, 2019-10-05.
• Moderne Methoden der Signalanalyse. 29. Rhein-Ruhr-Workshop 2019, Bergkloster Bestwig, Bestwig, Germany, 2019-02-02.
• Approaching NSP-EMD with B-Splines. Mathematical Institute, University of Cologne, Cologne, Germany. slides, 2018-06-07.
• Trust-Region- und Quasi-Newton-Verfahren. Bayer AG, Leverkusen, Germany. slides. handout, 2018-01-08.
• Anonymity Networks. Institute for Theoretical Physics, University of Cologne, Cologne, Germany, 2017-07-27. slides
• Thetafunktionen positiv definiter quadratischer Formen III: Thetafunktionen mit Charakteristik. Mathematical Institute, University of Cologne, Cologne, Germany, 2017-07-24. slides.
• farbfeld and color spaces. slcon 2016, Hofheim am Taunus, Germany, 2016-09-24.
• Unum-Arithmetik. Mathematical Institute, University of Cologne, Cologne, Germany, 2016-07-27.
• Dualität bei konvexer Optimierung. Mathematical Institute, University of Cologne, Cologne, Germany, 2016-05-02.
• UTF-8 everywhere? Writing Unicode compliant software that sucks less. slcon 2015, Budapest, Hungary, 2015-10-31.
• farbfeld - Rethinking image-formats. slcon 2015, Budapest, Hungary, 2015-10-30.
• suckless core - A suckless userspace foundation. slcon 2015, Budapest, Hungary, 2015-10-30.
• Toxische Metalle und Chelattherapie. Deutsche Schülerakademie (Akademie Braunschweig 2012-01, Kurs 1.2: Komplexchemie), Braunschweig, Germany, 2012-07-26.