Research Data Repository of Saxon Universities

OPARA is the Open Access Repository and Archive for Research Data of Saxon Universities.


Researchers of Saxon Universities can either publish their research data on OPARA, or archive it here to comply with requirements of funding acencies and good scientic practice, without public access.

You can find the documentation of this service at the ZIH Data Compendium websites. If you need suppourt using OPARA please contact the Servicedesk of TU Dresden.

Please note: The OPARA service was recently upgraded to a new technical platform (this site). Previously stored data will not be available here immediately. It can be found at the still active old version of OPARA. These stock data will be migrated in near future and then the old version of OPARA will finally be shut down. Existing DOIs for data publications remain valid.

Artwork based on 1, 2, 3, 4  @pixabay
 

Communities in OPARA

Select a community to browse its collections.

Recent Submissions

Item
Open Access
Data for "Ferrimagnetism from quantum fluctuations in Kitaev materials"
(Technische Universität Dresden, 2025-07-16) Francini, Niccolò; Cônsoli, Pedro M.; Janssen, Lukas
The archive contains the data used to construct Fig. 4, Fig. 5, Fig. 6, and Fig. 8 of the paper "Ferrimagnetism from quantum fluctuations in Kitaev materials" by N. Francini, Pedro M. Cônsoli, and L. Janssen [arXiv:2507.*****]. The work uses symmetry arguments and linear spin-wave theory to study the ferrimagnetic response of extended Kitaev-Heisenberg-Gamma models.
Item
Open Access
Original research data of “Systematic variation of the acceptor electrophilicity in donor-acceptor-donor emitters exhibiting efficient room temperature phosphorescence suited for digital luminescence"
(Technische Universität Dresden, 2025-07-16) Tsiko, Uliana; Fidelius, Jannis; Kaiser, Sebastian; Thomas, Heidi; Bui Thi, Yana; Weigand, Jan J.; Grazulevicius, Juozas V.; Schellhammer, Karl Sebastian; Reineke, Sebastian
Original research data to the following paper: Purely organic materials showing efficient and persistent emission via room temperature phosphorescence (RTP) allow the design of minimalistic yet powerful technological solutions for sensing, bioimaging, information storage, and safety applications using the photonic design principle of digital luminescence. Although several promising materials exist, a deep understanding of the underlying structure-property relationship and, thus, development of rational design strategies are widely missing. Some of the best purely organic emitters follow the donor-acceptor-donor design motif. In this study, the influence of the acceptor unit on the photophysical properties is systematically analyzed by synthesizing and characterizing variations of the RTP emitter 4,4′-dithianthrene-1-yl-benzophenone (BP-2TA). The most promising candidates are also tested in programmable luminescent tags as a potential application field for information storage. While no significant influence by the electrophilicity index of the acceptor moiety on the RTP emission is observed, the results support the design of molecules with pronounced hybridization as obtained for the newly synthesized emitter demonstrating superior RTP efficiency combined with improved stability.
Item
Open Access
Monitoring Data of the openLAB Research Bridge – Load Test on PE 2.1
(Technische Universität Dresden, 2025-07-14) Herbers, Max; Richter, Bertram; Walker, Maria; Marx, Steffen
Between May 5 and 7, 2025, extensive experiments were carried out on the openLAB research bridge. The test program was structured as follows: • Day 1: Static and dynamic measurements in the reference state • Day 2: Loading of the bridge using hydraulic jacks up to the ultimate limit state (yielding of prestressing steel) • Day 3: Local damage of prestressing tendons (cutting wires at several locations) The present dataset contains force and displacement measurements from the load test conducted on Day 2. The load was applied locally to precast element (PE) 2.1 (Field 2, PE axis 1) using two hydraulic jacks and increased up to 400 kN. Displacements were measured at five different positions along PE axis 1. Details on the measurement setup can be found in the attached file readme.txt. Additional information on the project, the bridge and reference-phase measurements is available under the following references: https://doi.org/10.1016/j.dib.2025.111624 https://onlinelibrary.wiley.com/doi/10.1002/best.202300094 Herbers, M., Richter, B., Jan-Hauke, B., Al-Zuriqat, T., Smarsly, K., & Marx, S. (2024, November). openLAB – A large-scale demonstrator for advancing digital twin developments of bridges. In 2024 fib Symposium (pp. 2057–2067). (see attachment) Value of the data: • Validation and calibration of finite element models (FEM) • Comparison with geodetic measurement methods (e.g., total station, drone survey) • Basis for interpreting data from additional monitoring systems (e.g., distributed fiber optic sensing, acceleration measurements, acoustic emission monitoring, etc.) The provided Python script enables data import, post-processing, and visualization of the measurement data (see example figures).
Item
Open Access
Crack monitoring with DFOS: Distributed strain measurements with various DFOS/adhesive combinations and model development for strain peak prediction
(Technische Universität Dresden, 2025-07-10) Herbers, Max; Richter, Bertram; Marx, Steffen
Coherent optical frequency domain reflectometry (c-OFDR) enables continuous and automated crack monitoring in concrete structures due to its high spatial resolution and long sensing range. However, the selection of a suitable DFOS/adhesive combination (DAC) remains a key challenge and is typically based on empirical knowledge. As a result, the monitoring quality is highly dependent on the user’s experience. Inappropriate choices can result in undetected cracks, degraded signal quality, miscalculated crack widths, or even fiber breakage. This study proposes a semi-analytical model for predicting strain curves for arbitrary crack patterns, based on experimentally derived parameters, such as sensitivity, strain lag parameter, and the extent of bond disturbance due to transverse cracking. The model was validated using strain measurements from tests on reinforced concrete specimens with multiple cracks. With only a few input parameters, it enables accurate representation of crack-induced strain peaks and allows for the consideration of measurement limitations typical for c-OFDR systems. Based on this, design charts and an open source software tool were developed to support practitioners in the systematic selection of DACs, tailored to the expected crack pattern.
Item
Open Access
FairBotBench
(Hochschule für Technik und Wirtschaft Dresden, 2025-07-03) Janusko, Tamás; Bochnia, Ricardo; Hempel, Gunnar; Tomschke, Steffen; Anke, Jürgen; Thiele, Maik
This paper presents a concept for building a benchmark dataset to systematically evaluate chatbot responses in e-commerce with respect to ethical quality dimensions such as bias, toxicity and personalization. The core approach involves generating neutral base dialogues of varying lengths, which are then expanded into more problematic variants and enriched with linguistic diversity. The data is annotated by humans through a multi-stage process. The resulting dataset is intended to support the development and calibration of ethical AI components. To increase utility an english translation of the dataset is provided.