4C-multiphysics/4C
Oct 2024 – May 2026
20 Months active
Languages Used
CMakeMarkdownShellYAMLC++XMLDatFortran
Technical Skills
Build System ConfigurationBuild SystemsCI/CDCI/CD ConfigurationDependency ManagementDocumentation
Max Firmbach
PROFILE
Max Firmbach
Over 20 months, contributed to the 4C-multiphysics/4C repository by engineering robust simulation software for distributed multiphysics analysis. Developed and refactored core features in C++ and CMake, modernizing linear algebra backends, solver infrastructure, and finite element modeling. Enhanced build systems, automated CI/CD pipelines, and improved dependency management for maintainable releases. Introduced advanced material models, expanded geometry and meshing capabilities, and standardized configuration through YAML and XML. Focused on code clarity, performance optimization, and test coverage, delivering scalable solutions for high-performance computing. The work emphasized modularity, reliability, and cross-platform compatibility, enabling efficient scientific workflows and streamlined future development.
Overall Statistics
Feature vs Bugs
89%Features
Repository Contributions
254Total
Bugs
11
Commits
254
Features
93
Lines of code
11,301,402
Activity Months20
Your Network
61 peopleSame Organization
@unibw.de10
Shared Repositories
51
Dharini BalachandranMember
Abhiroop SatheeshMember
Alexander HermannMember
Amadeus GebauerMember
Barbara WirthlMember
Benedikt GoderbauerMember
Benno SchoensteinMember
Christoph SchmidtMember
Daniel WolffMember
Work History
May 2026
1 Commits • 1 Features
May 1, 2026Month: 2026-05 – Established a robust DevOps foundation for the 4C project, enabling reliable, scalable releases and faster onboarding. Key feature delivered: CI/CD infrastructure and development workflow templates. This includes configuration files for code style and testing, GitHub Actions for building, testing, and deploying, and standardized templates for issues and pull requests to streamline collaboration and code quality. The work lays the groundwork for repeatable releases, improved traceability, and reduced cycle times.
1 Commits • 1 Features
May 1, 2026Month: 2026-05 – Established a robust DevOps foundation for the 4C project, enabling reliable, scalable releases and faster onboarding. Key feature delivered: CI/CD infrastructure and development workflow templates. This includes configuration files for code style and testing, GitHub Actions for building, testing, and deploying, and standardized templates for issues and pull requests to streamline collaboration and code quality. The work lays the groundwork for repeatable releases, improved traceability, and reduced cycle times.
May 2026
April 2026
16 Commits • 5 Features
Apr 1, 2026April 2026 performance summary for 4C project. Delivered key enhancements in dependency management, solver configuration, and documentation, with a focus on business value, reliability, and maintainability. The month’s work reduced build friction, standardized numerical configurations, and improved user-facing documentation and CI support, while preserving or improving numerical performance.
April 2026
16 Commits • 5 Features
Apr 1, 2026April 2026 performance summary for 4C project. Delivered key enhancements in dependency management, solver configuration, and documentation, with a focus on business value, reliability, and maintainability. The month’s work reduced build friction, standardized numerical configurations, and improved user-facing documentation and CI support, while preserving or improving numerical performance.
March 2026
18 Commits • 4 Features
Mar 1, 2026March 2026 monthly summary for 4C (4C-multiphysics/4C). Focused on delivering robust solver enhancements, expanded NURBS-based geometry capabilities, and cleaner, more maintainable code. Achievements span solver engineering, geometry calculations, and test infrastructure, with a clear path to increased simulation fidelity and developer productivity.
18 Commits • 4 Features
Mar 1, 2026March 2026 monthly summary for 4C (4C-multiphysics/4C). Focused on delivering robust solver enhancements, expanded NURBS-based geometry capabilities, and cleaner, more maintainable code. Achievements span solver engineering, geometry calculations, and test infrastructure, with a clear path to increased simulation fidelity and developer productivity.
March 2026
February 2026
15 Commits • 10 Features
Feb 1, 2026February 2026 monthly summary for 4C project. Delivered significant refactors, feature enhancements, and test/infra improvements across material modeling, geometry handling, beam interaction, and distributed computing, with a strong emphasis on maintainability, performance, and test coverage.
February 2026
15 Commits • 10 Features
Feb 1, 2026February 2026 monthly summary for 4C project. Delivered significant refactors, feature enhancements, and test/infra improvements across material modeling, geometry handling, beam interaction, and distributed computing, with a strong emphasis on maintainability, performance, and test coverage.
January 2026
4 Commits • 3 Features
Jan 1, 2026January 2026: Key features and modernization delivered in 4C; FFTW integration now optional with updated configuration messaging and Docker presets; orthotropic material model added with its properties and unit tests; migration from Epetra to NOX::Nln types improving consistency and maintainability. These changes reduce build dependencies, extend material modeling capabilities, and align with modern solver interfaces. No explicit bug fixes captured in this period, but significant stability and maintainability improvements accompany feature work. Demonstrated skills in build systems, numerical methods, and API modernization.
4 Commits • 3 Features
Jan 1, 2026January 2026: Key features and modernization delivered in 4C; FFTW integration now optional with updated configuration messaging and Docker presets; orthotropic material model added with its properties and unit tests; migration from Epetra to NOX::Nln types improving consistency and maintainability. These changes reduce build dependencies, extend material modeling capabilities, and align with modern solver interfaces. No explicit bug fixes captured in this period, but significant stability and maintainability improvements accompany feature work. Demonstrated skills in build systems, numerical methods, and API modernization.
January 2026
December 2025
40 Commits • 9 Features
Dec 1, 2025December 2025 (4C-multiphysics/4C) delivered meaningful core improvements, dependency modernization, and strengthened testing practices that drive reliability, maintainability, and cross-compatibility for future development. Key outcomes include a more capable Matrix and Solver Core API, reduced maintenance burden through dependency cleanup, expanded test coverage and reliability, CG-enabled thermo tests, and targeted bug fixes that improve correctness and reproducibility across platforms.
December 2025
40 Commits • 9 Features
Dec 1, 2025December 2025 (4C-multiphysics/4C) delivered meaningful core improvements, dependency modernization, and strengthened testing practices that drive reliability, maintainability, and cross-compatibility for future development. Key outcomes include a more capable Matrix and Solver Core API, reduced maintenance burden through dependency cleanup, expanded test coverage and reliability, CG-enabled thermo tests, and targeted bug fixes that improve correctness and reproducibility across platforms.
November 2025
15 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary for 4C-multiphysics/4C. Focused on modernization of the linear algebra backend and FE discretization API to deliver a more robust, maintainable, and scalable foundation for distributed multiphysics simulations. Delivered substantial changes to dependency management, API clarity, and performance-oriented refactors that enable easier upgrades and more reliable solves. Key features delivered during the month: - Modernize linear algebra backend and dependencies: introduced LinAlg::CombineType to support distributed computations, migrated sparse matrix handling to Thyra-based conversions, reduced Epetra dependencies, and refreshed Trilinos integration for robustness. - Infrastructure and compatibility improvements: added Thyra converter functions, refactored sparse matrix internals, updated Trilinos hash and supported version, and refreshed documentation to reflect the new backend. - FE discretization API clarity and stability: improved ghost element handling API, added an optional displacement parameter to the monolithic node graph construction, and optimized memory initialization patterns to enhance FE performance and memory efficiency. - Documentation, presets and CI stability: updated the IMCS preset and the latest supported version references, and stabilized CI by disabling a flaky MIRCO test. Major bugs fixed and stability improvements: - Hardened Epetra error checks and assertions, reducing risk of silent failures in edge cases. - Cleaned up block sparse matrix paths and internal representations to improve correctness and maintainability. - Updated Trilinos hash and compatibility to prevent mismatch failures during builds. - CI stability: MIRCO test disabled to prevent flaky CI results while changes matured. Overall impact and business value: - Provides a robust, scalable foundation for distributed linear algebra and FE solves, enabling larger simulations with fewer maintenance burdens. - Improves reliability of solvers and reduces risk during Trilinos upgrades, yielding faster enablement of new features. - Enhanced code clarity and API stability reduces onboarding time and accelerates future development. Technologies and skills demonstrated: - C++ modernization and refactoring patterns; API design improvements for ghosting and node graphs. - Distributed computing concepts via CombineType and Thyra-based matrix handling. - Trilinos/Epetra/Thyra integration, memory management optimizations, and build/CI discipline. - Documentation updates and alignment with new backend capabilities.
15 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary for 4C-multiphysics/4C. Focused on modernization of the linear algebra backend and FE discretization API to deliver a more robust, maintainable, and scalable foundation for distributed multiphysics simulations. Delivered substantial changes to dependency management, API clarity, and performance-oriented refactors that enable easier upgrades and more reliable solves. Key features delivered during the month: - Modernize linear algebra backend and dependencies: introduced LinAlg::CombineType to support distributed computations, migrated sparse matrix handling to Thyra-based conversions, reduced Epetra dependencies, and refreshed Trilinos integration for robustness. - Infrastructure and compatibility improvements: added Thyra converter functions, refactored sparse matrix internals, updated Trilinos hash and supported version, and refreshed documentation to reflect the new backend. - FE discretization API clarity and stability: improved ghost element handling API, added an optional displacement parameter to the monolithic node graph construction, and optimized memory initialization patterns to enhance FE performance and memory efficiency. - Documentation, presets and CI stability: updated the IMCS preset and the latest supported version references, and stabilized CI by disabling a flaky MIRCO test. Major bugs fixed and stability improvements: - Hardened Epetra error checks and assertions, reducing risk of silent failures in edge cases. - Cleaned up block sparse matrix paths and internal representations to improve correctness and maintainability. - Updated Trilinos hash and compatibility to prevent mismatch failures during builds. - CI stability: MIRCO test disabled to prevent flaky CI results while changes matured. Overall impact and business value: - Provides a robust, scalable foundation for distributed linear algebra and FE solves, enabling larger simulations with fewer maintenance burdens. - Improves reliability of solvers and reduces risk during Trilinos upgrades, yielding faster enablement of new features. - Enhanced code clarity and API stability reduces onboarding time and accelerates future development. Technologies and skills demonstrated: - C++ modernization and refactoring patterns; API design improvements for ghosting and node graphs. - Distributed computing concepts via CombineType and Thyra-based matrix handling. - Trilinos/Epetra/Thyra integration, memory management optimizations, and build/CI discipline. - Documentation updates and alignment with new backend capabilities.
November 2025
October 2025
15 Commits • 7 Features
Oct 1, 2025October 2025 (4C-multiphysics/4C) focused on robustness, maintainability, and solver integration, delivering key features, stability improvements, and stronger testing. Notable work includes thermo output configuration enhancements; solver abstraction and configuration improvements; Trilinos dependency and CI/workflow updates; core data structures and linear algebra utilities improvements; and enhanced error handling for Epetra operations. These changes improve simulation reliability, reduce CI failures, and streamline future solver enhancements, delivering business value through more trustworthy physics runtimes and faster integration of optimized solvers.
October 2025
15 Commits • 7 Features
Oct 1, 2025October 2025 (4C-multiphysics/4C) focused on robustness, maintainability, and solver integration, delivering key features, stability improvements, and stronger testing. Notable work includes thermo output configuration enhancements; solver abstraction and configuration improvements; Trilinos dependency and CI/workflow updates; core data structures and linear algebra utilities improvements; and enhanced error handling for Epetra operations. These changes improve simulation reliability, reduce CI failures, and streamline future solver enhancements, delivering business value through more trustworthy physics runtimes and faster integration of optimized solvers.
September 2025
24 Commits • 11 Features
Sep 1, 2025Month: 2025-09. Delivered a focused set of features and refactors in 4C to improve stability, modularity, and numerical performance. Key outcomes include clearer error handling with rank-zero logging, Krylov projection support, and comprehensive constraint and nullspace infrastructure. The work improved maintainability through input unification, namespace alignment, and extensive cleanup, positioning the project for scalable features and easier collaboration.
24 Commits • 11 Features
Sep 1, 2025Month: 2025-09. Delivered a focused set of features and refactors in 4C to improve stability, modularity, and numerical performance. Key outcomes include clearer error handling with rank-zero logging, Krylov projection support, and comprehensive constraint and nullspace infrastructure. The work improved maintainability through input unification, namespace alignment, and extensive cleanup, positioning the project for scalable features and easier collaboration.
September 2025
August 2025
23 Commits • 9 Features
Aug 1, 2025August 2025 — 4C repository (4C-multiphysics/4C): Focused on solver backend stabilization, API modernization for Suitesparse, and expanded validation. Key backend refactors and cross-cutting improvements reduced technical debt, improved reliability, and enabled scalable graph-based partitioning. Expanded test coverage and documentation to support ongoing development and onboarding.
August 2025
23 Commits • 9 Features
Aug 1, 2025August 2025 — 4C repository (4C-multiphysics/4C): Focused on solver backend stabilization, API modernization for Suitesparse, and expanded validation. Key backend refactors and cross-cutting improvements reduced technical debt, improved reliability, and enabled scalable graph-based partitioning. Expanded test coverage and documentation to support ongoing development and onboarding.
July 2025
6 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary focused on stabilizing and modernizing the build/workspace, expanding thermo diagnostics and solver efficiency, and increasing VTK data handling coverage. The work reduces maintenance costs, improves runtime reliability, and accelerates scientific workflows across the 4C project.
6 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary focused on stabilizing and modernizing the build/workspace, expanding thermo diagnostics and solver efficiency, and increasing VTK data handling coverage. The work reduces maintenance costs, improves runtime reliability, and accelerates scientific workflows across the 4C project.
July 2025
June 2025
10 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for 4C project (4C-multiphysics/4C). Focused on features delivery, code quality improvements, and standardization to reduce maintenance costs, with clearer boundary handling, streamlined linear algebra operations, standardized material property pipelines, and improved logging readability. Business value delivered includes improved maintainability, consistency across distributed matrices, and clearer data flows for ThermoStVenant materials.
June 2025
10 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for 4C project (4C-multiphysics/4C). Focused on features delivery, code quality improvements, and standardization to reduce maintenance costs, with clearer boundary handling, streamlined linear algebra operations, standardized material property pipelines, and improved logging readability. Business value delivered includes improved maintainability, consistency across distributed matrices, and clearer data flows for ThermoStVenant materials.
May 2025
10 Commits • 5 Features
May 1, 2025May 2025 monthly summary for 4C-multiphysics/4C: Key features delivered: - Modernized core linear algebra interfaces by replacing Epetra-based implementations with Core::LinAlg equivalents (SparseMatrix, etc.), introduced FE Graph support via Core::LinAlg::Graph, and streamlined sparse matrix usage by removing SparseMatrixBase in favor of SparseOperator where appropriate. - Geometric search module refactor with build system updates: internal components renamed/relocated and CMake updated to reflect new directory/file naming, improving code organization and maintainability. - Preconditioner setup cleanup and refactor: removed the create boolean flag from setup methods, standardizing creation and update behavior. - Test configuration updates: switched tests from SuperLU to UMFPACK to improve reliability, with ASAN-related test fixes. - IMCS workstation configuration update: updated preset metadata/configuration to reflect new defaults. Major bugs fixed: - Reduced Epetra dependency exposure and eliminated remaining epetra_matrix calls; merged SparseMatrix with its base to simplify maintenance and reduce edge-case failures. - Stabilized test suite by adopting UMFPACK and applying ASAN fixes, reducing false positives and flaky test results. - Updated build/config references to new component naming to avoid breakages during integration. Overall impact and accomplishments: - Strengthened numerical kernel foundation with modernized interfaces and FE graph support, enabling easier optimization and cross-platform portability. - Improved maintainability and reliability across the codebase through refactors, build system modernization, and test infrastructure improvements. - Delivered tangible business value by reducing dependency debt, lowering risk of build/test regressions, and accelerating future feature work. Technologies/skills demonstrated: - Core::LinAlg, FE Graph integration, Graph operations, SparseOperator usage - C++ component design, deprecated API removal, code cleanup and refactoring - Build systems: CMake modernization, directory/file organization - Testing/infrastructure: test configuration, ASAN considerations, UMFPACK integration - DevOps readiness: workstation preset updates and configuration management
10 Commits • 5 Features
May 1, 2025May 2025 monthly summary for 4C-multiphysics/4C: Key features delivered: - Modernized core linear algebra interfaces by replacing Epetra-based implementations with Core::LinAlg equivalents (SparseMatrix, etc.), introduced FE Graph support via Core::LinAlg::Graph, and streamlined sparse matrix usage by removing SparseMatrixBase in favor of SparseOperator where appropriate. - Geometric search module refactor with build system updates: internal components renamed/relocated and CMake updated to reflect new directory/file naming, improving code organization and maintainability. - Preconditioner setup cleanup and refactor: removed the create boolean flag from setup methods, standardizing creation and update behavior. - Test configuration updates: switched tests from SuperLU to UMFPACK to improve reliability, with ASAN-related test fixes. - IMCS workstation configuration update: updated preset metadata/configuration to reflect new defaults. Major bugs fixed: - Reduced Epetra dependency exposure and eliminated remaining epetra_matrix calls; merged SparseMatrix with its base to simplify maintenance and reduce edge-case failures. - Stabilized test suite by adopting UMFPACK and applying ASAN fixes, reducing false positives and flaky test results. - Updated build/config references to new component naming to avoid breakages during integration. Overall impact and accomplishments: - Strengthened numerical kernel foundation with modernized interfaces and FE graph support, enabling easier optimization and cross-platform portability. - Improved maintainability and reliability across the codebase through refactors, build system modernization, and test infrastructure improvements. - Delivered tangible business value by reducing dependency debt, lowering risk of build/test regressions, and accelerating future feature work. Technologies/skills demonstrated: - Core::LinAlg, FE Graph integration, Graph operations, SparseOperator usage - C++ component design, deprecated API removal, code cleanup and refactoring - Build systems: CMake modernization, directory/file organization - Testing/infrastructure: test configuration, ASAN considerations, UMFPACK integration - DevOps readiness: workstation preset updates and configuration management
May 2025
April 2025
20 Commits • 6 Features
Apr 1, 2025April 2025: Focused on stabilizing the build/dependency surface, improving test reliability, and modularizing the codebase to deliver business value across installation, testing, and backend-agnostic changes. Deliveries include adjustments to ArborX install paths, Kokkos environment management, Trilinos/Intrepid2 upgrades, a Geometric Search refactor, and test suite modernization to UMFPACK with standardized single-processor runs.
April 2025
20 Commits • 6 Features
Apr 1, 2025April 2025: Focused on stabilizing the build/dependency surface, improving test reliability, and modularizing the codebase to deliver business value across installation, testing, and backend-agnostic changes. Deliveries include adjustments to ArborX install paths, Kokkos environment management, Trilinos/Intrepid2 upgrades, a Geometric Search refactor, and test suite modernization to UMFPACK with standardized single-processor runs.
March 2025
2 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary focusing on key features delivered, major bugs fixed, overall impact and accomplishments, and technologies demonstrated for the 4C project. Summary of work includes targeted feature enhancements and dependency updates to enable reliable deployment and maintain functional geometry search.
2 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary focusing on key features delivered, major bugs fixed, overall impact and accomplishments, and technologies demonstrated for the 4C project. Summary of work includes targeted feature enhancements and dependency updates to enable reliable deployment and maintain functional geometry search.
March 2025
February 2025
17 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for 4C: Major refactors delivered to improve maintainability, initialization reliability, and solver robustness. Key features: Thermo Module Cleanup and API Simplification; Solver Infrastructure Cleanup and Preconditioning Update. These changes streamline initialization, remove deprecated time integration options, relocate thermo inputs/outputs into the thermo module, and consolidate adapters and tests for better consistency. Overall impact includes a simpler configuration path, reduced risk of misconfiguration, and stronger solver robustness for larger simulations.
February 2025
17 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for 4C: Major refactors delivered to improve maintainability, initialization reliability, and solver robustness. Key features: Thermo Module Cleanup and API Simplification; Solver Infrastructure Cleanup and Preconditioning Update. These changes streamline initialization, remove deprecated time integration options, relocate thermo inputs/outputs into the thermo module, and consolidate adapters and tests for better consistency. Overall impact includes a simpler configuration path, reduced risk of misconfiguration, and stronger solver robustness for larger simulations.
January 2025
6 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for 4C-multiphysics/4C. Focused on strengthening the thermomechanical material modeling, improving module organization, and enabling runtime visibility of calculations. Delivered a unified and extensible heat-conduction material framework, enhanced runtime visibility, and restructured the thermo module to improve maintainability and build clarity. The work reduced technical debt, improved performance alignment with current requirements, and provided clearer signals for continued feature expansion.
6 Commits • 4 Features
Jan 1, 2025January 2025 monthly summary for 4C-multiphysics/4C. Focused on strengthening the thermomechanical material modeling, improving module organization, and enabling runtime visibility of calculations. Delivered a unified and extensible heat-conduction material framework, enhanced runtime visibility, and restructured the thermo module to improve maintainability and build clarity. The work reduced technical debt, improved performance alignment with current requirements, and provided clearer signals for continued feature expansion.
January 2025
December 2024
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly development summary for 4C (4C-multiphysics/4C). Focused on delivering performance, stability, and maintainability improvements through targeted features, solver backend updates, and a critical memory-management fix. These efforts enhanced load balancing, solver reliability, and overall simulation stability, with measurable business value in faster, more predictable runs and reduced maintenance costs.
December 2024
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly development summary for 4C (4C-multiphysics/4C). Focused on delivering performance, stability, and maintainability improvements through targeted features, solver backend updates, and a critical memory-management fix. These efforts enhanced load balancing, solver reliability, and overall simulation stability, with measurable business value in faster, more predictable runs and reduced maintenance costs.
November 2024
3 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for 4C-multiphysics/4C: Focused on stabilizing the codebase, expanding thermal solver capabilities, and extending material models to support anisotropic conduction. Delivered multigrid-enabled thermo solver with template and test integration to improve performance and accuracy in thermal simulations, introduced MAT_Fourier for anisotropic heat conduction, and removed an unused matrix split routine to simplify maintenance and reduce potential defects. These efforts deliver tangible business value by boosting solver throughput, accuracy, and maintainability.
3 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for 4C-multiphysics/4C: Focused on stabilizing the codebase, expanding thermal solver capabilities, and extending material models to support anisotropic conduction. Delivered multigrid-enabled thermo solver with template and test integration to improve performance and accuracy in thermal simulations, introduced MAT_Fourier for anisotropic heat conduction, and removed an unused matrix split routine to simplify maintenance and reduce potential defects. These efforts deliver tangible business value by boosting solver throughput, accuracy, and maintainability.
November 2024
October 2024
6 Commits • 2 Features
Oct 1, 2024October 2024: Build-system/CI modernization (CMake 3.30 upgrade, installer/CI alignment, better error reporting and installer integrity checks, Docker dependency hash updates, and docs) and ILU preconditioning for block solvers (COORD entries) to improve convergence and stability.
October 2024
6 Commits • 2 Features
Oct 1, 2024October 2024: Build-system/CI modernization (CMake 3.30 upgrade, installer/CI alignment, better error reporting and installer integrity checks, Docker dependency hash updates, and docs) and ILU preconditioning for block solvers (COORD entries) to improve convergence and stability.
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Quality Metrics
Correctness91.0%
Maintainability89.0%
Architecture87.4%
Performance82.2%
AI Usage21.2%
Skills & Technologies
Programming Languages
CC++CMakeDatDockerfileFortranJSONJinjaMarkdownPython
Technical Skills
API DesignAlgorithm DesignBug FixingBuild AutomationBuild ConfigurationBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentC++ developmentC++ programmingCI/CDCI/CD Configuration
Repositories Contributed To
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