kelseymh/G4CMP
Oct 2024 – Jun 2026
17 Months active
Languages Used
TexttextC++MarkdownNoneShellMakeMakefile
Technical Skills
Documentationdocumentationrelease managementC++C++ DevelopmentConfiguration Management
Michael Kelsey
PROFILE
Michael Kelsey
Over 17 months, this developer advanced the kelseymh/G4CMP simulation framework, focusing on physics modeling, code reliability, and developer usability. They delivered features such as configurable crystal materials, robust multithreaded debugging, and enhanced phonon and charge transport algorithms using C++ and Geant4. Their technical approach emphasized modularity, defensive programming, and validation, with improvements to build systems via CMake and documentation generation through Doxygen. By refining algorithms, strengthening error handling, and modernizing build infrastructure, they improved simulation fidelity and release readiness. Their work enabled reproducible research, streamlined onboarding, and ensured the codebase remained maintainable and compatible with evolving Geant4 standards.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
146Total
Bugs
23
Commits
146
Features
38
Lines of code
2,696,703
Activity Months17
Your Network
76 peopleShared Repositories
31
Caitlyn Stone-WhiteheadMember
David SadekMember
David SadekMember
David SadekMember
David SadekMember
David SadekMember
David SadekMember
David SadekMember
David SadekMember
Work History
June 2026
18 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for kelseymh/G4CMP focusing on foundational bootstrap, configurability, safety, and release readiness. Highlights include the G4CMP project bootstrap with core infrastructure (build, docs, crystal material maps) and the introduction of QPDiffusion-based stability: per-volume parameter support for the QPDiffusion time stepper and a new QPDiffusion setting to avoid fatal exceptions by emitting warnings instead. Added a configurable primary phonon energy parameter and UI/config updates to override Debye energy for primary phonon partitioning, enabling more flexible energy distribution. Strengthened validation, safety checks, and diagnostics across energy transport and lattice quasiparticle logic to prevent invalid configurations and runtime errors. Delivered RISQ 2026 documentation, tutorials, and release notes to support a successful launch.
18 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for kelseymh/G4CMP focusing on foundational bootstrap, configurability, safety, and release readiness. Highlights include the G4CMP project bootstrap with core infrastructure (build, docs, crystal material maps) and the introduction of QPDiffusion-based stability: per-volume parameter support for the QPDiffusion time stepper and a new QPDiffusion setting to avoid fatal exceptions by emitting warnings instead. Added a configurable primary phonon energy parameter and UI/config updates to override Debye energy for primary phonon partitioning, enabling more flexible energy distribution. Strengthened validation, safety checks, and diagnostics across energy transport and lattice quasiparticle logic to prevent invalid configurations and runtime errors. Delivered RISQ 2026 documentation, tutorials, and release notes to support a successful launch.
June 2026
May 2026
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for kelseymh/G4CMP: focused on configurable crystal materials and stability improvements for core diffusion and partition modules. Delivered configurable crystal material files and edge-case handling that improved QPDiffusion and EnergyPartition stability and performance. Addressed multiple bug fixes in QPDiffusion and EnergyPartition (commit 744884ec46a7fcd2f84a9b33c34680b47fb88558). Overall impact includes enhanced configurability, reliability, and performance for material simulations.
May 2026
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for kelseymh/G4CMP: focused on configurable crystal materials and stability improvements for core diffusion and partition modules. Delivered configurable crystal material files and edge-case handling that improved QPDiffusion and EnergyPartition stability and performance. Addressed multiple bug fixes in QPDiffusion and EnergyPartition (commit 744884ec46a7fcd2f84a9b33c34680b47fb88558). Overall impact includes enhanced configurability, reliability, and performance for material simulations.
February 2026
7 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for kelseymh/G4CMP. Delivered focused feature enhancements and stability fixes that improve simulation accuracy, reliability, and developer productivity. Key outcomes include robust TrackLimiter improvements, safer lattice-not-found handling with a defined secondary creation path, improved crash resistance through null checks, and enhanced data integrity by surfacing secondary counts before generation. All changes align with business value of more reliable Geant4-based simulations and streamlined maintenance in preparation for the V10-01-01 release.
7 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for kelseymh/G4CMP. Delivered focused feature enhancements and stability fixes that improve simulation accuracy, reliability, and developer productivity. Key outcomes include robust TrackLimiter improvements, safer lattice-not-found handling with a defined secondary creation path, improved crash resistance through null checks, and enhanced data integrity by surfacing secondary counts before generation. All changes align with business value of more reliable Geant4-based simulations and streamlined maintenance in preparation for the V10-01-01 release.
February 2026
January 2026
28 Commits • 5 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for kelseymh/G4CMP. Delivered a major release prep (V10-00-00) with superconducting film tracking features, enhanced build/validation readiness, and strengthened alignment with G4 v11. Major improvements covered build system, validation install options, and QP example compatibility, enabling smoother releases and validated deployments. Implemented a broad set of bug fixes and maintenance tasks that improve reliability, maintainability, and cross-version compatibility. The work enhances business value through clearer release readiness, reduced integration risk, and faster onboarding for new G4 v11-era features.
January 2026
28 Commits • 5 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for kelseymh/G4CMP. Delivered a major release prep (V10-00-00) with superconducting film tracking features, enhanced build/validation readiness, and strengthened alignment with G4 v11. Major improvements covered build system, validation install options, and QP example compatibility, enabling smoother releases and validated deployments. Implemented a broad set of bug fixes and maintenance tasks that improve reliability, maintainability, and cross-version compatibility. The work enhances business value through clearer release readiness, reduced integration risk, and faster onboarding for new G4 v11-era features.
December 2025
5 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for kelseymh/G4CMP. Delivered key feature and code-quality improvements in Geant4 core and G4CMPPhysics that enhance simulation accuracy, reliability, and maintainability. All changes align with Geant4 v11 requirements and code standards, delivering business value through improved physics modeling, cross-platform stability, and reduced runtime overhead.
5 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for kelseymh/G4CMP. Delivered key feature and code-quality improvements in Geant4 core and G4CMPPhysics that enhance simulation accuracy, reliability, and maintainability. All changes align with Geant4 v11 requirements and code standards, delivering business value through improved physics modeling, cross-platform stability, and reduced runtime overhead.
December 2025
November 2025
18 Commits • 1 Features
Nov 1, 2025Month: 2025-11 – Delivered a focused Geant4 v11 migration for G4CMP with build-system and compatibility enhancements, accompanied by targeted stability hardening and documentation updates. The work lays a robust foundation for Geant4 v11 adoption, reduces upgrade risk, and improves long-term maintainability of the simulation stack.
November 2025
18 Commits • 1 Features
Nov 1, 2025Month: 2025-11 – Delivered a focused Geant4 v11 migration for G4CMP with build-system and compatibility enhancements, accompanied by targeted stability hardening and documentation updates. The work lays a robust foundation for Geant4 v11 adoption, reduces upgrade risk, and improves long-term maintainability of the simulation stack.
October 2025
4 Commits • 2 Features
Oct 1, 2025October 2025: Delivered reliability-focused improvements for the G4CMP project, including a robust bug fix for NaN values in phonon energy reporting, foundational groundwork for electron boundary scattering with a modularized approach to specular/diffuse handling, and a release update (V09-09-00) featuring charge tracking fixes and a new phonon density of states tutorial. These efforts enhance energy accounting accuracy, prepare for more advanced scattering models, and improve release quality and developer onboarding.
4 Commits • 2 Features
Oct 1, 2025October 2025: Delivered reliability-focused improvements for the G4CMP project, including a robust bug fix for NaN values in phonon energy reporting, foundational groundwork for electron boundary scattering with a modularized approach to specular/diffuse handling, and a release update (V09-09-00) featuring charge tracking fixes and a new phonon density of states tutorial. These efforts enhance energy accounting accuracy, prepare for more advanced scattering models, and improve release quality and developer onboarding.
October 2025
September 2025
4 Commits • 3 Features
Sep 1, 2025September 2025: Focused on documentation enhancements and physics fidelity improvements in G4CMP. Delivered Phonon DOS tutorial and README fix; refined surface charge reflection modeling to allow a configurable number of reflections and more accurate reflection probabilities; updated recombination energy accounting to include residual kinetic energy in energy deposition. Impact includes improved simulation accuracy, reproducibility, and user onboarding, enabling more reliable material and device analyses.
September 2025
4 Commits • 3 Features
Sep 1, 2025September 2025: Focused on documentation enhancements and physics fidelity improvements in G4CMP. Delivered Phonon DOS tutorial and README fix; refined surface charge reflection modeling to allow a configurable number of reflections and more accurate reflection probabilities; updated recombination energy accounting to include residual kinetic energy in energy deposition. Impact includes improved simulation accuracy, reproducibility, and user onboarding, enabling more reliable material and device analyses.
August 2025
3 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 (kelseymh/G4CMP). Focus this month was on improving simulation fidelity and ensuring release/documentation quality for smoother adoption by users and maintainers. Key physics enhancement introduced a thermalization cut in TrackLimiter to terminate thermal phonons when temperature > 0. The new PhononIsThermal logic determines thermalized phonons based on temperature and kinetic energy, improving physical accuracy and potentially reducing unnecessary phonon propagation. In parallel, I corrected release notes and ChangeHistory entries for the g4cmp release, ensuring accurate version tracking (updating to reflect g4cmp-V09-08-01 and fixing the ChangeHistory tag from V09-08-01 to V09-08-00).
3 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 (kelseymh/G4CMP). Focus this month was on improving simulation fidelity and ensuring release/documentation quality for smoother adoption by users and maintainers. Key physics enhancement introduced a thermalization cut in TrackLimiter to terminate thermal phonons when temperature > 0. The new PhononIsThermal logic determines thermalized phonons based on temperature and kinetic energy, improving physical accuracy and potentially reducing unnecessary phonon propagation. In parallel, I corrected release notes and ChangeHistory entries for the g4cmp release, ensuring accurate version tracking (updating to reflect g4cmp-V09-08-01 and fixing the ChangeHistory tag from V09-08-01 to V09-08-00).
August 2025
July 2025
3 Commits • 2 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on G4CMP (kelseymh/G4CMP). Main deliverables centered on code clarity improvements and documentation generation, aligned with maintainability and API discoverability goals.
July 2025
3 Commits • 2 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on G4CMP (kelseymh/G4CMP). Main deliverables centered on code clarity improvements and documentation generation, aligned with maintainability and API discoverability goals.
May 2025
11 Commits • 2 Features
May 1, 2025May 2025 performance summary for kelseymh/G4CMP: Delivered significant physics and robustness improvements focused on track integrity, scattering behavior, and observability, with an emphasis on configurable, testable changes that support experimental tuning and production reliability.
11 Commits • 2 Features
May 1, 2025May 2025 performance summary for kelseymh/G4CMP: Delivered significant physics and robustness improvements focused on track integrity, scattering behavior, and observability, with an emphasis on configurable, testable changes that support experimental tuning and production reliability.
May 2025
April 2025
9 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for kelseymh/G4CMP focused on delivering physics accuracy, build stability, and developer enablement for the V09-06-00 release. Key outcomes include integrating silica phonon properties into CrystalMaps with release notes, strengthening phonon boundary handling and internal correctness, and updating documentation to support future development and user understanding. The work emphasizes business value through improved simulation fidelity, reduced release risk, and clearer maintenance paths.
April 2025
9 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for kelseymh/G4CMP focused on delivering physics accuracy, build stability, and developer enablement for the V09-06-00 release. Key outcomes include integrating silica phonon properties into CrystalMaps with release notes, strengthening phonon boundary handling and internal correctness, and updating documentation to support future development and user understanding. The work emphasizes business value through improved simulation fidelity, reduced release risk, and clearer maintenance paths.
March 2025
6 Commits • 1 Features
Mar 1, 2025March 2025 highlights for kelseymh/G4CMP: focused on reliability, data integrity, and developer usability. Completed targeted fixes and documentation improvements that boost result accuracy, release readiness, and contributor experience.
6 Commits • 1 Features
Mar 1, 2025March 2025 highlights for kelseymh/G4CMP: focused on reliability, data integrity, and developer usability. Completed targeted fixes and documentation improvements that boost result accuracy, release readiness, and contributor experience.
March 2025
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 (kelseymh/G4CMP) focused on stabilizing concurrency in multi-threaded initialization and strengthening release discipline. Key work reduced data-race risk, improved observability of changes, and laid groundwork for production-grade releases. The month culminated with release-notes-driven documentation updates and a master-branch release setup for critical fixes.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 (kelseymh/G4CMP) focused on stabilizing concurrency in multi-threaded initialization and strengthening release discipline. Key work reduced data-race risk, improved observability of changes, and laid groundwork for production-grade releases. The month culminated with release-notes-driven documentation updates and a master-branch release setup for critical fixes.
January 2025
17 Commits • 3 Features
Jan 1, 2025January 2025 (2025-01) - G4CMP focused on increasing multithreaded robustness, improving traceability in debugging outputs, strengthening NIEL data validation, and modernizing the build/tooling workflow. All work targeted business value: more reliable MT runs, easier validation, faster onboarding for new contributors, and cleaner, more maintainable code paths that support release readiness.
17 Commits • 3 Features
Jan 1, 2025January 2025 (2025-01) - G4CMP focused on increasing multithreaded robustness, improving traceability in debugging outputs, strengthening NIEL data validation, and modernizing the build/tooling workflow. All work targeted business value: more reliable MT runs, easier validation, faster onboarding for new contributors, and cleaner, more maintainable code paths that support release readiness.
January 2025
December 2024
7 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for kelseymh/G4CMP highlighting key features, bugs fixed, impact, and skills demonstrated. The month focused on documentation quality, physics accuracy, and debugging infrastructure improvements across the repository, aligning with product reliability and development workflow goals.
December 2024
7 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for kelseymh/G4CMP highlighting key features, bugs fixed, impact, and skills demonstrated. The month focused on documentation quality, physics accuracy, and debugging infrastructure improvements across the repository, aligning with product reliability and development workflow goals.
October 2024
3 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for kelseymh/G4CMP focusing on release stabilization and materials expansion for phonon simulations. Key activities centered on maintaining release notes integrity, preparing history files for smooth merges, and enabling new phonon materials and a caustics example to accelerate validation and demonstrations.
3 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for kelseymh/G4CMP focusing on release stabilization and materials expansion for phonon simulations. Key activities centered on maintaining release notes integrity, preparing history files for smooth merges, and enabling new phonon materials and a caustics example to accelerate validation and demonstrations.
October 2024
Activity
Loading activity data...
Quality Metrics
Correctness94.0%
Maintainability92.4%
Architecture89.6%
Performance88.0%
AI Usage24.2%
Skills & Technologies
Programming Languages
C++CMakeDoxygenMakeMakefileMarkdownN/ANoneShellText
Technical Skills
3D visualizationAlgorithm RefinementBackend DevelopmentBuild ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentC++ developmentC++ programmingCMakeCMake configurationCode CleanupCode CommentingCode Refactoring
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline