TUHH Open Research

TORE is the repository for Open Access publications and for research data of the Hamburg University of Technology (TUHH). As a research information system, TORE makes the TUHH's research landscape visible to the outside world. Institutes and working groups, researchers, their publications, research data and projects are presented here.

Members of the TUHH can publish their scientific work such as dissertations, preprints or accepted manuscripts as well as research data here and make them available in the long term.

TUHH Institutions
Research Data
Recent Additions
  • Publication
    Sustainable product purchase : does information about product sustainability on social media affect purchase behavior?
    (Springer International Publishing, 2019-10-17) ; ; ;
    Nowadays, consumer-to-consumer communication and its impact on purchase decisions have gained substantial consideration owing to digitalization and the emergence of internet-based social media platforms. Social media allows consumers to communicate with thousands of people well beyond their network. Consequently, the demand for transparency from industrial corporations has increased. It even becomes more important to understand how sustainability-related information on social media holds organizations accountable for their wrongdoings and reward them for taking sustainability-related initiatives. In this research work, the authors investigate how information that is available on social media influences consumers’ purchase behavior with regard to sustainable products in the context of developing countries. Therefore, the authors surveyed social media users residing in Pakistan and used partial least squares structural equation modeling (PLS-SEM) to analyze the collected data. The results established that positive and negative sustainability-related information on social media significantly influences consumers’ intention to purchase sustainable products. Furthermore, this study explains that consumers’ willingness to seek sustainabilityrelated information makes them dependent on social media and this dependency on social media affects their intention to purchase.
  • Publication
    Flexibility - grand challenge for product design and production : review and status
    (Elsevier, 2023) ;
    Lee, Jongsuk
    As seen in recent years, the volatile, uncertain, complex, and ambiguous environment has made flexibility in product design and production planning more important than ever. Therefore, companies must be able to quickly respond to the dynamically changing environment. However, research on the flexibility of product design and manufacturing systems has been underway for a long time, only a few studies address their relationship. In this paper, we give an overview of literature related to flexibility and add transparency to the relationship between engineering changes, product development, and production. Based on that, we propose a conceptual framework for co-development to improve the flexibility of product development and production. As part of the framework, we introduce a visualization that reveals the propagation of changes in the product and into the production to create deeper insights for conjoint redesign. To exploit further synergies of product and production, we suggest modularization with focus on strategic module drivers enhancing flexibility. Further support for the comparison of alternative concepts can be provided through digital twin-based simulations of the production system.
  • Publication
    Catalytic reactor for operando spatially resolved structure–activity profiling using high‐energy X‐ray diffraction
    (International Union of Crystallography, 2023)
    Wollak, Birte 
    Espinoza , Diego
    ; ; ; ; ; ; ;
    In heterogeneous catalysis, operando measurements probe catalysts in their active state and are essential for revealing complex catalyst structure–activity relationships. The development of appropriate operando sample environments for spatially resolved studies has come strongly into focus in recent years, particularly when coupled to the powerful and multimodal characterization tools available at synchrotron light sources. However, most catalysis studies at synchrotron facilities only measure structural information about the catalyst in a spatially resolved manner, whereas gas analysis is restricted to the reactor outlet. Here, a fully automated and integrated catalytic profile reactor setup is shown for the combined measurement of temperature, gas composition and high-energy X-ray diffraction (XRD) profiles, using the oxidative de­hydrogenation of C2H6 to C2H4 over MoO3/γ-Al2O3 as a test system. The profile reactor methodology was previously developed for X-ray absorption spectroscopy and is here extended for operando XRD. The profile reactor is a versatile and accessible research tool for combined spatially resolved structure–activity profiling, enabling the use of multiple synchrotron-based characterization methods to promote a knowledge-based optimization of a wide range of catalytic systems in a time- and resource-efficient way.
  • Publication
    Impact of method users on the application of design methods : assessing the role of method-related background knowledge
    By conducting experiments in controlled environments, design researchers test the suitability of design methods for users in practice. However, users in practice bring a variety of background knowledge that is not reflected by the samples with homogeneous knowledge used in controlled environments, especially student samples. To investigate the influence of background knowledge, two method validation experiments with participants with different background knowledge were replicated and evaluated. The results show an influence of background knowledge regarding method use and outcome. Therefore, the background knowledge of the participants must be taken into account when planning method validation experiments in order to ensure that the results are valid for practice.
  • Publication
    Mullite photonic glasses with exceptional thermal stability for novel reflective thermal barrier coatings
    Thermal barrier coatings are essential materials systems for insulating and protecting substrates exposed to high temperatures. In such systems, the heat transfer has three possible paths: conduction, convection and irradiation. The higher the operating temperature, the more important it is to control or protect against the radiative component, since the radiative heat flux becomes non-negligible. The radiation can be controlled by the use of ceramic-based photonic nanostructures, namely photonic crystals and photonic glasses, creating so-called reflective thermal barrier coatings. In this work, mullite inverse photonic glasses (PhG) have been produced by thermally induced reaction on sol–gel-based silica structures coated with nanometric films of Al2O3 by atomic layer deposition. The conversion to mullite was carried out following a two-stage heat-treatment. The pre-annealing associated with the further mullite formation results in an excellent structural stability of these PhGs up to 1500 °C, being able to retain their high reflectivity in the near infrared range. Therefore, this structure can be considered for next-generation reflective thermal barrier coatings. Graphical abstract: [Figure not available: see fulltext.]
Recent Additions
  • Research Data
    Geotechnical Laboratory Investigation on the Baltic Sea Sand Sample Z_VC_011
    (2023-08-31) ;
    Banduch, Markus
    This dataset includes geotechnical laboratory tests conducted on a Baltic Sea sand sample (Core Z_VC_011) from the Falster-Rügen Plate, extracted using a vibracorer. The dataset comprises grain size distribution (sieve analysis), density determination at the loosest and densest packing, one oedometer test (CRS), and three CD triaxial tests (50, 100, and 200 kPa consolidation pressure) as well as three triaxial tests with deformation reversal (0, 90, and 180 °). All laboratory tests were carried out according to current standards. An accompanying explanatory document is included. These data form the basis for determining hypoplastic constitutive parameters for modeling the structure-soil interaction in the Baltic Sea region.
  • Research Data
    Sediment samples from the weser estuary - lab generated time dependend density profiles and lutocline evolution
    As part of the FAUST project, both field and laboratory investigations were conducted on the sediment exchange behavior of cohesive sediments in the Weser estuary. A particular focus of the work was the examination of vertical exchange processes at the interface between the water column and highly concentrated suspensions. Since the transitions between the sub-processes of sediment exchange are partially fluid or directly connected, investigations were carried out not only on the predominant aspects of settling and erosion behavior but also on consolidation behavior and rheology of cohesive sediments. The methodology to generate the density profiles is described in the corresponding publication, where the results were published and discussed first hand (https://doi.org/10.3389/feart.2022.916056). In general, an Anton Paar DMA Standard Densimeter has been used to measure the suspensions densities. For very high (approx. >1300 kg/m³) densities a suspension balance has been used as alternative. Lutocline evolution curves are generated by digitization of photographic observations of the lutoclines evolution over time. Information on the composition (approximate fractions of sand, silt and clay) of the sediments used is also given in https://doi.org/10.3389/feart.2022.916056. Data abbreviations are location based: BB - Blexer Bogen, NH - Nordenham, H - Harbour, S - Ship, L - Laboratory, MW - Measurementtrip Weser; Numbers are sample and field trip specific. Natural profiles: e.g. MW-II, NH-13H: Sample number 3 from the second field trip (first 0, second 1,...) on the Weser (MW-II) collected at Position Nordenham. Density profile generated immediately after returning in the harbour (H). Lab generated development of density-depth-profiles: e.g. BB-05 rho_0 = 1065 kg/m³: Sample number 5 from the first field trip on the Weser collected at Position Blexer Bogen having an initially homogeneous density profile of rho_0 = 1065 kg/m³
  • Research Data
    Supplementary material (Version 2) to publication with title: Development of a tree-support software module for PBF-LB/M
    The goal of this work was to develop a tool that allows users with little experience to manufacture components with efficient support structures using PBF-LB/M. Tree shaped structures were used and created via algorithmic, biological growth using botanical methods. TO was used to optimize the support structures. The generated trees were then compared to two commercially available supports using FEA to simulate the whole PBF-LB/M process including a stress relief heat treatment and the removal of the part from build plate and supports. The data is supplementary material to the publication with the title " Development of a tree-support software module for PBF-LB/M " of the conference Laser in Manufacturing (LiM) 2023, 26 - 29 July 2023, Munich/Germany.
  • Research Data
    Daten zur Umfrage: Vorbeugender Grundwasserschutz - Anpassung der Landbewirtschaftung zur Reduzierung der Nitratverunreinigung im Grundwasser
    This is data on an expert survey conducted in 2019 at the Institute of Wastewater Management and Water Protection in Hamburg Germany. The aim of this survey was to identify ways to adapt agriculture to reduce nitrate inputs to groundwater. Additionally, it was intended to investigate whether organic farming is the solution to the nitrate problem in groundwater, whether far more measures are needed, or even fewer regulations are enough. Furthermore, factors influencing a conversion to organic farming were considered. The survey included 14 questions and was distributed directly by email to individuals and through associations and other technical channels. A total of 30 individuals from water management (n = 8), agriculture (n = 15), water as well as agriculture (n = 3), and other disciplines (n = 4) responded to the survey. The survey results were processed in detail in a master's thesis. Part of the results were presented at the „32. Hamburger Kolloquium zur Abwasserwirtschaft“ at TUHH in the talk „Zukunftssicherung von Wasser und Nahrung: Förderung wassergerechter Landwirtschaft durch die Wasserwirtschaft“ and published in the conference proceedings: 32. Hamburger Kolloquium zur Abwasserwirtschaft, Band Nr. 107. Hamburg: GFEU (Hamburger Berichte zur Siedlungswasserwirtschaft) , S. 63–79, ISBN: 978-3-942768-32-0. This dataset contains the questionnaire "20230220_Umfrage.pdf," a complete listing of all answers "20230628_umfragedaten_full" (.ods and .xlsx), and a tidy-sheet excluding the direct text answers "20230628_umfragedaten_tidy.csv". Details on the data are described in the "20230630_Umfrage_Readme_v1.pdf" including a codebook for the csv file. All files are available in German only.
  • Research Data
    Role of slice thickness quantification in the 3D reconstruction of FIB tomography data of nanoporous materials
    This dataset contains synthetic structures of hierarchical nanoporous gold, which mimics real hierarchical nanoporous gold structures, segmentation results and repositioned interpolated structures of the real hierarchical nanoporous gold dataset and trained weights of machine learning model used for interpolation. For more information, please refer to the published research article: Role of slice thickness quantification in the 3D reconstruction of FIB tomography data of nanoporous materials.