AliceO2Group/O2Physics
Aug 2025 – May 2026
4 Months active
Languages Used
C++
Technical Skills
C++ DevelopmentFull Stack DevelopmentPhysics SimulationC++QA testingdata analysis
Kegang Xiong
PROFILE
Kegang Xiong
Contributed to the AliceO2Group/O2Physics repository by developing and enhancing features for particle identification and ZDC energy analysis workflows using C++. Delivered a configurable strict mode for particle identification, refactored event selection logic, and improved numerical stability in physics simulations. Enhanced data quality and maintainability by replacing magic numbers with named constants and introducing robust data structures for ZDC energy measurements. Focused on code quality, maintainability, and efficient data handling, leveraging skills in C++ development, data analysis, and scientific computing. Collaborated on workflow improvements and QA enhancements, supporting reliable downstream analysis and strengthening readiness for evolving physics data requirements.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
5Total
Bugs
0
Commits
5
Features
4
Lines of code
484
Activity Months4
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145 peopleShared Repositories
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Work History
May 2026
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for AliceO2Group/O2Physics: Delivered a focused enhancement to the ZDC tree storage by introducing a new data structure for energy measurements within the O2 framework. This change improves data handling, storage efficiency, and downstream analysis capabilities for ZDC energy data. The work was implemented as a single commit and integrated with the broader O2Physics codebase, with co-authorship credited. No major bugs were logged this month. The delivery strengthens measurement reliability, contributes to performance improvements in data processing, and supports ongoing physics analysis workflows.
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for AliceO2Group/O2Physics: Delivered a focused enhancement to the ZDC tree storage by introducing a new data structure for energy measurements within the O2 framework. This change improves data handling, storage efficiency, and downstream analysis capabilities for ZDC energy data. The work was implemented as a single commit and integrated with the broader O2Physics codebase, with co-authorship credited. No major bugs were logged this month. The delivery strengthens measurement reliability, contributes to performance improvements in data processing, and supports ongoing physics analysis workflows.
May 2026
April 2026
1 Commits • 1 Features
Apr 1, 2026Month: 2026-04 | AliceO2Group/O2Physics – concise monthly summary focusing on business value and technical achievements. Key features delivered: - FlowZdcEnergy Refactor and Event Selection Enhancement for Run 2/3: Replaced magic numbers with named constants in the flowZdcEnergy structure and improved event selection logic to enable more reliable data processing for Run 2 and Run 3. Major bugs fixed: - Fixed the magic number usage in FlowZdcEnergy (commit: 1baf73c2095db6fae64e07e2e19f36244bea32d5). This correction reduces miscount risks and improves maintainability. Overall impact and accomplishments: - Increased data processing reliability and correctness for Run 2/3, reducing downstream analysis errors. - Improved code health and maintainability by removing hard-coded constants and clarifying the flowZdcEnergy logic. - Strengthened readiness for Run 2/3 data workflows and simplified future enhancements. Technologies/skills demonstrated: - C++ refactoring and constants-based configuration - Event selection logic optimization - Version control discipline and collaboration (coordinated fixes with peers) - Focus on data quality, robustness, and maintainability.
April 2026
1 Commits • 1 Features
Apr 1, 2026Month: 2026-04 | AliceO2Group/O2Physics – concise monthly summary focusing on business value and technical achievements. Key features delivered: - FlowZdcEnergy Refactor and Event Selection Enhancement for Run 2/3: Replaced magic numbers with named constants in the flowZdcEnergy structure and improved event selection logic to enable more reliable data processing for Run 2 and Run 3. Major bugs fixed: - Fixed the magic number usage in FlowZdcEnergy (commit: 1baf73c2095db6fae64e07e2e19f36244bea32d5). This correction reduces miscount risks and improves maintainability. Overall impact and accomplishments: - Increased data processing reliability and correctness for Run 2/3, reducing downstream analysis errors. - Improved code health and maintainability by removing hard-coded constants and clarifying the flowZdcEnergy logic. - Strengthened readiness for Run 2/3 data workflows and simplified future enhancements. Technologies/skills demonstrated: - C++ refactoring and constants-based configuration - Event selection logic optimization - Version control discipline and collaboration (coordinated fixes with peers) - Focus on data quality, robustness, and maintainability.
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) — Delivered ZDC Energy Analysis Workflow with QA Enhancements in O2Physics, enabling detailed event selection, energy histogram generation, and integrated QA plots. Updated event selection configurations to improve event counting accuracy and data validation. This work improves data quality for ZDC analyses, accelerates QA feedback, and strengthens maintainability through clear commit traceability (PWGCF references).
2 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) — Delivered ZDC Energy Analysis Workflow with QA Enhancements in O2Physics, enabling detailed event selection, energy histogram generation, and integrated QA plots. Updated event selection configurations to improve event counting accuracy and data validation. This work improves data quality for ZDC analyses, accelerates QA feedback, and strengthens maintainability through clear commit traceability (PWGCF references).
March 2026
August 2025
1 Commits • 1 Features
Aug 1, 2025Summary for 2025-08: Implemented a configurable Strict Mode for Particle Identification (PID) in O2Physics, introducing the cfgUseStrictPID option to enable a more stringent PID strategy. The change refactors cross-track identification handling and adds a small non-zero epsilon to prevent numerical issues, with logic to either exit early when strict PID cannot uniquely identify a particle or proceed with the existing lowest-n-sigma selection when strict mode is disabled. No major defects fixed this month; effort focused on feature delivery, code quality, and maintainability.
August 2025
1 Commits • 1 Features
Aug 1, 2025Summary for 2025-08: Implemented a configurable Strict Mode for Particle Identification (PID) in O2Physics, introducing the cfgUseStrictPID option to enable a more stringent PID strategy. The change refactors cross-track identification handling and adds a small non-zero epsilon to prevent numerical issues, with logic to either exit early when strict PID cannot uniquely identify a particle or proceed with the existing lowest-n-sigma selection when strict mode is disabled. No major defects fixed this month; effort focused on feature delivery, code quality, and maintainability.
Activity
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Quality Metrics
Correctness84.0%
Maintainability80.0%
Architecture84.0%
Performance80.0%
AI Usage24.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++C++ DevelopmentC++ programmingFull Stack DevelopmentPhysics SimulationQA testingdata analysisdata structuresdata visualizationevent processingevent-driven programmingscientific computing
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