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Femke Nijsse

PROFILE

Femke Nijsse

Over eight months, Floris Nijsse enhanced the cpmodel/FTT_StandAlone repository by developing new simulation features, optimizing performance, and improving documentation. He introduced country-specific datasets, expanded the FTT Hydrogen model, and implemented parallel processing using Python and Numba to accelerate financial calculations. Floris addressed reliability by safeguarding against division-by-zero errors and refining simulation timing logic, while also adopting the MIT License to broaden collaboration. His work included extensive code cleanup, vectorization, and technical writing, resulting in a more maintainable codebase. These contributions improved model accuracy, reduced runtime errors, and streamlined onboarding, reflecting a thorough and methodical engineering approach.

Overall Statistics

Feature vs Bugs

71%Features

Repository Contributions

42Total
Bugs
6
Commits
42
Features
15
Lines of code
105,970
Activity Months12

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for cpmodel/FTT_StandAlone focused on repo hygiene and maintainability. Delivered cleanup by removing unused CSV files from the Steel Model that were already present in Masterfile, improving clarity and reducing duplication. PR merged from cpmodel/remove_unused_steel_inputs (PR #294); commit d411ea648702bf35c317dd2ef9f51754f5ecec1e.

January 2026

1 Commits

Jan 1, 2026

January 2026 focused on stabilizing the data processing path in cpmodel/FTT_StandAlone. The month's primary contribution was a critical bug fix to correct MSSP assignment in the rldc data processing, ensuring MSSP maps to MSSR (not MLSR) and preventing downstream data inaccuracies. No new features were delivered this month; the emphasis was on reliability and correctness of the data pipeline. The fix reduces the risk of misprocessed MSSP data and improves overall data integrity in the FTT StandAlone workflow.

December 2025

10 Commits • 3 Features

Dec 1, 2025

Concise monthly summary focusing on documentation, onboarding, and tooling improvements across two repositories. December 2025 delivered focused documentation enhancements, environment setup simplifications, and dev tooling cleanups that accelerate onboarding, improve reproducibility, and increase contributor efficiency. While no critical defects were surfaced, quality improvements across docs and setups were prioritized to reduce support load and accelerate downstream work.

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025 performance summary for cpmodel/FTT_StandAlone focused on reliability and maintainability improvements in the simulation workflow. Delivered targeted timing accuracy fix for start times across all runs and eliminated dead code, with clear commit traces and minimal behavioral changes.

August 2025

7 Commits • 2 Features

Aug 1, 2025

August 2025 monthly summary for the cpmodel/FTT_StandAlone repository, highlighting delivered features, fixed issues, and overall impact aligned with business value.

July 2025

4 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary for cpmodel/FTT_StandAlone: Delivered a performance-oriented feature improvement and documentation clarity enhancements. The work focused on optimizing financial cost calculations in the power sector analysis and aligning documentation with actual parameters to reduce downstream confusion. These changes improve execution speed, code maintainability, and API understanding for stakeholders.

May 2025

4 Commits • 1 Features

May 1, 2025

May 2025 monthly summary: Delivered foundational enhancements to the FTT stand-alone workflow in cpmodel/FTT_StandAlone, introducing the FTT Hydrogen model and improving developer onboarding through updated README and installation/run instructions; completed targeted documentation improvements for FTT-Heat to ensure accuracy and clarity. These changes advance data availability, deployment ease, and overall model reliability, enabling faster iteration and informed decision-making for stakeholders.

March 2025

1 Commits • 1 Features

Mar 1, 2025

Summary for 2025-03: Expanded dataset capabilities in cpmodel/FTT_StandAlone by adding Pakistan MCSC input (MCSC_PK.csv) to Inputs/S0/General, enabling Pakistan-specific simulations. Commit: 06b7db917ee5a1105591d50aa085955187c82c0e ('Add Pakistan MCSC file'). No major bugs fixed this month. Overall impact: broader business coverage, faster scenario analyses for Pakistan, and maintained alignment with the existing MCSC ingestion workflow. Technologies/skills demonstrated: data onboarding, file-path conventions, version-controlled feature delivery, and maintaining data integrity across country datasets.

February 2025

3 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for cpmodel/FTT_StandAlone highlighting licensing, documentation improvements, and code quality efforts. Key outcomes include MIT License adoption to enable broader collaboration and commercial use with distributable software/docs, and targeted fixes to ensure documentation accuracy and learning-rate references.

December 2024

2 Commits

Dec 1, 2024

December 2024 (cpmodel/FTT_StandAlone): Delivered targeted documentation improvements for FTT-Heat and FTT-Power update manuals. Consolidated corrections and clarifications to enhance user guidance, consistency, and maintainability. Changes tracked in two commits across the two manuals, strengthening version control and traceability.

November 2024

1 Commits

Nov 1, 2024

November 2024: Focused on stability and reliability of storage pricing calculations within the FTT StandAlone module. Fixed division-by-zero risk in storage price calculations (ftt_p_rldc.py) by adding safe-guards for zero denominators, ensuring robust operation in regions with limited wind/solar generation. Change landed in commit d0e93019956ce0bad599daf92b7e1a9808e15097 titled 'Update ftt_p_rldc.py'. Result: reduced runtime errors, more trustworthy pricing, and stronger foundation for downstream economic modeling and decision making.

June 2024

6 Commits • 3 Features

Jun 1, 2024

June 2024 Monthly Summary for cpmodel/FTT_StandAlone: Delivered substantive FTT model enhancements and accuracy improvements, consolidated cost-curve logic, and updated MCFC alignment to reflect current BCET. Completed code cleanup to reduce duplication and stabilized data paths by reverting experimental changes. The work substantially improves energy model reliability for planning and decision-making, with clear documentation updates for maintainability.

Activity

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Quality Metrics

Correctness95.2%
Maintainability95.2%
Architecture94.4%
Performance94.8%
AI Usage30.4%

Skills & Technologies

Programming Languages

CSVMarkdownPythonYAMLreStructuredText

Technical Skills

API developmentCode CleanupCode RefactoringData AnalysisData EngineeringData ManipulationDocumentationDocumentation ImprovementEnvironment ConfigurationLicensingNumbaNumerical ComputingParallel ComputingPerformance OptimizationPython

Repositories Contributed To

2 repos

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

cpmodel/FTT_StandAlone

Jun 2024 Feb 2026
12 Months active

Languages Used

PythonMarkdownCSVYAML

Technical Skills

PythonPython programmingdata analysisenergy modelingmodelingnumerical methods

open-energy-transition/pypsa-earth

Dec 2025 Dec 2025
1 Month active

Languages Used

MarkdownreStructuredText

Technical Skills

climate modelingcopyeditingdata analysisdata managementdocumentationinstallation instructions