AMReX-FHD/FHDeX
Jan 2025 – Apr 2026
4 Months active
Languages Used
C++FortranJSONPythonShellYAML
Technical Skills
C++ ProgrammingFortran ProgrammingHigh-Performance ComputingNumerical SimulationParallel ComputingAMReX Framework
jbb
PROFILE
Jbb
Worked on the AMReX-FHD/FHDeX repository, delivering core enhancements to particle-based scientific simulations over four months. Focused on improving simulation stability, accuracy, and scalability, this developer implemented features such as external potential integration and robust checkpointing, while resolving bugs related to particle movement, refluxing, and hybrid ensemble workflows. Leveraged C++, Fortran, and CUDA to update particle initialization, advection, and boundary handling, ensuring reliable long-running simulations and reproducible results. Applied advanced numerical methods and parallel computing techniques to support production-ready workflows, demonstrating strong Git practices and cross-team collaboration to address both technical challenges and business needs in high-performance scientific computing.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
6Total
Bugs
3
Commits
6
Features
3
Lines of code
6,439,599
Activity Months4
Your Network
72 peopleShared Repositories
11
Andy NonakaMember
Ann AlmgrenMember
Changho KimMember
isrivaMember
Ishan SrivastavaMember
Ishan SrivastavaMember
Jean M. SextonMember
Bhargav Sriram SiddaniMember
Weiqun ZhangMember
Work History
April 2026
2 Commits • 1 Features
Apr 1, 2026In April 2026, delivered core FHDeX enhancements focused on particle simulations and robust checkpointing, while addressing stability issues in hybrid ensemble workflows. The work emphasizes reliability, scalability, and business value for long-running simulations.
2 Commits • 1 Features
Apr 1, 2026In April 2026, delivered core FHDeX enhancements focused on particle simulations and robust checkpointing, while addressing stability issues in hybrid ensemble workflows. The work emphasizes reliability, scalability, and business value for long-running simulations.
April 2026
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 - FHDeX (AMReX-FHD/FHDeX) delivered external potential integration for the DK hybrid simulation, enabling external-field driven particle initialization, advection, and boundary-condition updates. This feature lays groundwork for more realistic physics modeling and enables researchers to explore external-field scenarios in the DK hybrid context. The change set includes updates to particle initialization, distribution, and movement calculations consistent with the new potential, providing a clear path for validation against external-field benchmarks in future work.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 - FHDeX (AMReX-FHD/FHDeX) delivered external potential integration for the DK hybrid simulation, enabling external-field driven particle initialization, advection, and boundary-condition updates. This feature lays groundwork for more realistic physics modeling and enables researchers to explore external-field scenarios in the DK hybrid context. The change set includes updates to particle initialization, distribution, and movement calculations consistent with the new potential, providing a clear path for validation against external-field benchmarks in future work.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for AMReX-FHD/FHDeX focusing on numerical stability, conservation, and production-readiness. Implemented stochastic flux average recalculation to improve stability/accuracy and fixed refluxing with periodic boundaries to preserve particle conservation. These changes enhance cross-boundary data movement correctness, traceability through commits, and overall simulation fidelity for production runs.
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for AMReX-FHD/FHDeX focusing on numerical stability, conservation, and production-readiness. Implemented stochastic flux average recalculation to improve stability/accuracy and fixed refluxing with periodic boundaries to preserve particle conservation. These changes enhance cross-boundary data movement correctness, traceability through commits, and overall simulation fidelity for production runs.
February 2025
January 2025
1 Commits
Jan 1, 2025January 2025: Stabilized the DK Hybrid Simulation in FHDeX through targeted bug fixes and data-consistency improvements, delivering more reliable and reproducible results for downstream analyses.
January 2025
1 Commits
Jan 1, 2025January 2025: Stabilized the DK Hybrid Simulation in FHDeX through targeted bug fixes and data-consistency improvements, delivering more reliable and reproducible results for downstream analyses.
Activity
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Quality Metrics
Correctness81.6%
Maintainability76.6%
Architecture76.6%
Performance66.6%
AI Usage23.4%
Skills & Technologies
Programming Languages
C++FortranJSONPythonShellYAML
Technical Skills
AMReX FrameworkC++C++ DevelopmentC++ ProgrammingCUDAFortran ProgrammingFortran programmingGitHigh-Performance ComputingNumerical MethodsNumerical SimulationParallel ComputingParticle MethodsParticle SimulationScientific Computing
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