Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.43: Poster

Monday, March 9, 2026, 09:30–12:30, P2

Workflow for Robust Code and Data Management exemplified for the numerical calculation of the Hopf index — •Jonas Nothhelfer, Ross Knapman, and Karin Everschor-Sitte — Universität Duisburg-Essen

Structured workflows for code and data management are essential in scientific projects to ensure reproducibility, transparency, and high-quality results. In this work, we examine such workflows from the perspective of a system administrator, focusing on the infrastructure and tools required to support scientific computing. Using a recent project as a case study, we illustrate a workflow designed to make the projects numerical methods for calculating the three-dimensional topological Hopf index accessible to the research community [1]. The workflow not only provides Python scripts but also includes extensions for the established micromagnetic simulation software Mumax3 [2]. Code development and version control are managed via GitLab, ensuring that the most up-to-date source code is available [3], while Zenodo is employed to assign persistent identifiers to released versions, thereby facilitating long-term accessibility and citation [4].
[1] R. Knapman, et al., Phys. Rev. B 111, 134408 (2025).

[2] A. Vansteenkiste, et al., AIP Adv. 4, 107133 (2014).

[3] https://git.uni-due.de/twist-external/numericalhopfindexcalculation.

[4] https://zenodo.org/records/14007386, https://zenodo.org/records/14006428.

Keywords: code-management; gitlab; mumax3; Hopf index; Zenodo