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Sjoerd Bouma

PROFILE

Sjoerd Bouma

Over 17 months, contributed to the NuRadioMC and RNO-G/mattak repositories by building robust scientific data processing pipelines and simulation tools for radio astronomy and particle physics. Leveraging Python, C++, and NumPy, developed features such as cross-version serialization, advanced antenna modeling, and high-fidelity waveform simulation. Improved CI/CD workflows, enhanced documentation, and maintained compatibility across Python versions to ensure reproducible research and streamlined onboarding. Addressed complex challenges in data handling, signal processing, and numerical methods, while implementing rigorous testing and release management. The work emphasized maintainability, performance optimization, and reliability, supporting both legacy data formats and evolving scientific requirements.

Overall Statistics

Feature vs Bugs

65%Features

Repository Contributions

240Total
Bugs
43
Commits
240
Features
80
Lines of code
12,094
Activity Months17

Work History

March 2026

2 Commits • 1 Features

Mar 1, 2026

In March 2026 (2026-03), NuRadioMC delivered a targeted test enhancement and a critical bug fix that strengthen data integrity, test reliability, and deployment readiness. The RNO-G detector tests were enhanced to load configurations from JSON and validate the detector signal chain, expanding test coverage and reliability. A bug fix was implemented for Calibration Delay Assignment in TBBData_Dal1 to correctly read calibration delays from file attributes, eliminating a reader error when handling single-element arrays. These changes reduce debugging time, improve data quality, and enable faster feedback in CI pipelines.

February 2026

9 Commits • 4 Features

Feb 1, 2026

February 2026 (nu-radio/NuRadioMC): Delivered user-facing enhancements to ARZ shower modeling with Xmax exposure and richer shower profile outputs; stabilized ARZ outputs with an empty-trace signature fix; upgraded ARZ numerical integration to trapezoid-based methods for performance and compatibility; added CSV-based custom amplifier support; and improved documentation for clarity and consistency. These changes improve data fidelity, runtime performance, user customization, and maintainability, aligning with business goals of reliability and user empowerment.

January 2026

13 Commits • 3 Features

Jan 1, 2026

Concise monthly summary for NuRadioMC (2026-01): Implemented significant physics and reliability improvements, delivering a more realistic simulator, more robust tests, and better developer workflow. Version bumped to 3.1.0 with physics-driven waveform and energy-dependent inelasticity; cross-section computations now default to power-law integration for improved accuracy. Strengthened test suite reliability through data format, reference file, and calibration updates; addressed NumPy/SciPy compatibility and I/O stability; added multiprocessing guard for standalone usage. Documented changes and release notes to prepare upcoming dev releases.

December 2025

6 Commits • 2 Features

Dec 1, 2025

December 2025 monthly summary for nu-radio/NuRadioMC development focusing on delivering extended cross-section capabilities, improving numerical robustness, and enriching detector site data for analytics and downstream simulations. The work enhances physics coverage, stability of calculations, and data-driven site context, enabling more accurate high-energy simulations and streamlined testing.

November 2025

2 Commits • 1 Features

Nov 1, 2025

November 2025 monthly summary for NuRadioMC: Implemented critical correctness improvements in CORSIKA-based shower generation and angular calculations, delivering business value through accurate simulations and reliable data products. Focused on aligning data flow with CORSIKA integration and stabilizing geometry handling to support downstream analyses.

October 2025

4 Commits • 2 Features

Oct 1, 2025

October 2025 monthly summary for nu-radio/NuRadioMC focusing on CI/CD optimization and dependency management. Delivered features that improve CI reliability, streamline workflows, and simplify packaging, enabling faster feedback and more robust builds.

September 2025

19 Commits • 5 Features

Sep 1, 2025

September 2025 delivered robustness, performance, and reliability improvements for NuRadioMC, with a focus on safer initialization semantics, faster processing, and improved developer experience. Key features include strengthened singleton semantics to prevent silent reinitialization with conflicting args, introduction of an SNR-only mode to speed up processing when full signal properties are unnecessary, and broad documentation/CI enhancements. Notable upgrades also extended memory-efficient design in the Cython wrapper, and improved cross-version dependency management. Major fixes addressed noise calculation accuracy when caching is disabled and routine maintenance to ensure repository integrity. These efforts collectively boost stability, processing speed, and CI reliability while improving cross-version compatibility and documentation continuity.

August 2025

5 Commits • 1 Features

Aug 1, 2025

Concise monthly summary for 2025-08 focusing on accessibility, compatibility, and reliability in NuRadioMC. Implemented quick-access workflow by adding a symlink from NuRadioReco to the NuRadioMC example notebook for reading NUR files, improved Python-version compatibility via dependency adjustments, and strengthened design correctness with Singleton reliability improvements and a bug fix in DetectorBase. These changes reduce onboarding friction, minimize cross-version issues, and boost stability of data processing pipelines.

July 2025

14 Commits • 4 Features

Jul 1, 2025

July 2025 monthly summary for NuRadioMC: - Delivered major enhancements to antenna modeling and data handling, documentation, notebook workflow, and CI/testing. Focused on increasing modeling accuracy, developer productivity, and CI reliability. - Demonstrated strong collaboration with precise versioning, robust documentation, and automated data workflows to reduce manual steps and improve reproducibility. - Business value delivered through improved simulation fidelity, faster validation cycles, and more reliable data processing pipelines.

June 2025

11 Commits • 2 Features

Jun 1, 2025

June 2025: Delivered self-contained LOFAR example with a downloadable sample data tarball and tuned logging verbosity for data reading, strengthening reproducibility and onboarding. Strengthened repository robustness with IO and logging improvements, including HDF5 output handling for non-triggered stations and standardized data structures. Cleaned documentation for accuracy, and elevated release quality with changelog integration and versioning updates to 3.0.3. These changes reduce user friction, improve stability across Python 3.7, and streamline release workflows.

May 2025

10 Commits • 3 Features

May 1, 2025

May 2025 monthly summary for nu-radio/NuRadioMC focusing on stability, maintainability, and data compatibility. Key outcomes include compatibility with older data formats, robust operational logging, and improved serialization, supported by targeted refactors and documentation updates. These changes reduce support overhead for legacy files, enhance data processing reliability, and position the codebase for future integrations and performance improvements.

April 2025

7 Commits • 3 Features

Apr 1, 2025

April 2025: NuRadioMC delivered major CI/CD and packaging workflow improvements, refined optional dependencies, and updated release notes/docs. The changes improved build reliability, simplified optional feature management, and aligned installation guidance with current requirements. Version bumped to 3.1.0-dev and deprecated installation options removed (including [RNO-G]), supporting a cleaner, more predictable release process.

March 2025

26 Commits • 10 Features

Mar 1, 2025

March 2025 monthly results for two repositories (RNO-G/mattak and nu-radio/NuRadioMC). Business value delivered this month centers on packaging correctness, CI reliability, code quality, and unit consistency to support safer releases, reproducible benchmarks, and easier maintenance. Key highlights include: - RNO-G/mattak: Packaging metadata modernization (move homepage to project.urls in pyproject.toml) to align with modern Python packaging standards; CI stability improvement by scheduling GitHub Actions weekly (Sunday at midnight) to prevent benchmark cache eviction; fix for test evaluation exit code to ensure sys.exit is only invoked on test failures. - nu-radio/NuRadioMC: Documentation and logging cleanup/improvements enhancing readability and contributor guidance; core functionality and unit handling updates to ensure LOFAR read path uses Nuradio units and to incorporate calibration delays in readLOFARData, along with related refactors to improve performance and maintainability (vectorization of time delay calculation, support for ndim > 2 position arrays, and version bump); addition of RNO-G antennas hashes to support new hardware; and targeted fixes to keep changes backward compatible (including LOFAR unit handling revert under specific conditions).

February 2025

41 Commits • 17 Features

Feb 1, 2025

February 2025 monthly summary for NuRadioMC: Delivered core reliability and developer-experience improvements across analytics, serialization, testing, and CI. Highlights include serialization refactor leveraging copyreg (moved to __init__.py; use copyreg.pickle), analytic path length/travel-time equations with documentation, and expanded test coverage with updated references and a trace_start_times equality test. CI and tooling enhancements added a new CI script, framework .show methods for class introspection, and interactive notebook support in CI, together with changelog and documentation updates. Key bug fixes addressed internal 2D coordinate handling in analytic raytracing/plotting and merge-conflict resolution; several internal correctness and docstring fixes were applied, and a timing delay was removed from the placeholder IGLU response. The month also laid groundwork for future versioning and deprecation of older Python support. Overall impact: higher modeling accuracy, more robust serialization and tests, and a streamlined deployment and onboarding process. Technologies demonstrated: Python (copyreg, pickle, __init__.py refactor), numpy array contiguity, logging, CI scripting, pre-commit tooling, and documentation/testing discipline.

January 2025

37 Commits • 11 Features

Jan 1, 2025

January 2025 monthly summary for nu-radio/NuRadioMC. Focused on stabilizing the developer experience while delivering key features and performance improvements. Implemented dependency management and CI enhancements (optional dependencies, install-all option, and Python 3.10 CI formatting), restored stability by reverting Python<3.10 compatibility changes, and advanced performance with fastnumpyio I/O and Philox RNG for galactic noise. Strengthened channelBlockOffsetFitter with auto-mode decision and run method, plus correct offset storage. Documentation and maintainability were improved through consolidated module docstrings, times/docs formatting, and a refreshed changelog plus removal of the radiocalibrationtoolkit for cleanup.

December 2024

10 Commits • 5 Features

Dec 1, 2024

December 2024 (2024-12) monthly summary for nu-radio/NuRadioMC. Focused on cross-version data portability, simulation fidelity, IO performance instrumentation, and CI readiness, with Python-version compatibility improvements and a release-stable bugfix. Delivered concrete features and stability improvements that reduce data portability risk, increase realism of noise simulations, and accelerate testing and release cycles.

November 2024

24 Commits • 6 Features

Nov 1, 2024

November 2024 highlights performance-driven feature delivery across two repositories (RNO-G/mattak and nu-radio/NuRadioMC), combined with reliability improvements in CI and robust test data handling. Delivered multi-repo capabilities for polarized signal analysis, channel management, and unfolding/storage workflows, while addressing critical site-specific physics considerations and documentation quality.

Activity

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Quality Metrics

Correctness90.6%
Maintainability91.8%
Architecture87.8%
Performance85.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

BashBinaryC++CSVCythonJupyter NotebookMATLABMarkdownPythonRST

Technical Skills

API DesignAPI DocumentationAntenna Simulation Data ProcessingAwkward ArrayBackend DevelopmentBranching StrategyBug FixBug FixingBuild ConfigurationC++CI/CDChangelog ManagementCode CleanupCode QualityCode Refactoring

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

nu-radio/NuRadioMC

Nov 2024 Mar 2026
17 Months active

Languages Used

PythonRSTShellTOMLYAMLtextMATLABText

Technical Skills

API DocumentationBug FixingCode CleanupCode RefactoringData AnalysisData Processing

RNO-G/mattak

Nov 2024 Mar 2025
2 Months active

Languages Used

PythonYAMLTOML

Technical Skills

Awkward ArrayCI/CDCode RefactoringData ProcessingNumPyPerformance Testing