@article{FitzScheeg2025, author = {Fitz, Lukas R. G. and Scheeg, Jochen}, title = {Alternative digital platforms: comparative analysis through the lens of Corporate Aikido}, series = {Information Systems and e-Business Management}, journal = {Information Systems and e-Business Management}, publisher = {Springer}, doi = {10.1007/s10257-025-00703-8}, pages = {1 -- 22}, year = {2025}, abstract = {Competing with dominant players in the digital platform (DP) economy is an increasingly complex and expensive endeavor for alternative digital platform (ADP) providers trying to disrupt established platform ecosystems. Nevertheless, ADPs position themselves deliberately in the competitive space of large competitors, targeting customer groups whose values and mindsets differ from mainstream DPs. Although there are many examples to find in practice, the variety of ADPs across different DP ecosystems and industries, especially in regards of strategic objectives, directions and characteristics, has not been researched in-depth yet. Based on a systematic, practice-based artifact review, this paper analyses and compares 105 ADPs in the competitive space of dominant DP ecosystem players. The study utilizes the theory of Corporate Aikido as an analytical framework, mapping the strategic elements of overthrowing established value propositions and turning a competitors' strengths into weaknesses. Our findings indicate that privacy- and security-awareness, empowerment and inclusivity, premium quality and curation, open source and free access, uncensored, transparent and decentralized platforms as well as ecological and climate-friendly offers shape the landscape of alternative approaches in today's DP economy. The results are subsequently discussed, yielding managerial implications and future opportunities for DP research.}, language = {en} } @article{FitzScheeg2025, author = {Fitz, Lukas R. G. and Scheeg, Jochen}, title = {Coping Practices of Small- and Medium-Sized Enterprises Facing Power Asymmetry in Digital Platform Business}, series = {Strategic Change}, journal = {Strategic Change}, publisher = {Wiley}, doi = {10.1002/jsc.2657}, pages = {1 -- 21}, year = {2025}, abstract = {Digital platform (DP) enterprises have risen to the top of the global economy by inverting traditional business models. They earn money through matchmaking, transaction facilitation, and efficient orchestration of other stakeholders' resources. Small- and medium-sized enterprises (SMEs) play a decisive role in this success story: they offer products and services on many leading DPs and thereby feed platform networks as sellers and suppliers. On the other hand, while DPs enable SMEs to reach new customers and outsource costly managerial tasks, many SMEs struggle with the negative consequences of asymmetric power dynamics and dependency risks in platform business. This paper analyzes 14 cases of SMEs that face power asymmetry as DP value providers, unraveling challenges encountered and coping practices employed in this situation. The findings reveal that power asymmetry between dominant DPs and SMEs creates significant challenges, including exploitative relationships, loss of autonomy, surveillance pressures, and devaluation of SME contributions, while SMEs cope through disintermediation, multi-homing, individual resistance tactics, and striving for more equitable DP models. Moreover, three relationality types are identified: DPs being SMEs' "partners," "tools," and "necessary evil." This article offers a new perspective on boundaries of SME strategies in the DP economy and contributes with empirical insights to the advancing field of entrepreneurial platform research.}, language = {en} } @article{FitzScheegScheeg2022, author = {Fitz, Lukas R. G. and Scheeg, Michaela and Scheeg, Jochen}, title = {Amplifying Human Factors in the Inquiry of SMEs' Needs in Digitalization Collaborations with External Service Providers}, series = {Procedia Computer Science}, volume = {200}, journal = {Procedia Computer Science}, publisher = {Elsevier}, issn = {1877-0509}, doi = {10.1016/j.procs.2022.01.257}, pages = {595 -- 601}, year = {2022}, language = {en} } @article{FonvielleBistarelliTaoetal.2025, author = {Fonvielle, Jeremy and Bistarelli, Lukas Thuile and Tao, Yile and Woodhouse, Jason N. and Shatwell, Tom and Villalba, Luis A. and Berger, Stella A. and Kyba, Christopher C. M. and Nejstgaard, Jens C. and Jechow, Andreas and Kupprat, Franziska and Stephan, Susanne and Walles, Tim J. W. and Wollrab, Sabine and Hoelker, Franz and Dittmar, Thorsten and Gessner, Mark O. and Singer, Gabriel A. and Grossart, Hans-Peter}, title = {Skyglow increases cyanobacteria abundance and organic matter cycling in lakes}, series = {Water Research}, journal = {Water Research}, publisher = {Elsevier}, doi = {10.1016/j.watres.2025.123315}, pages = {1 -- 11}, year = {2025}, abstract = {Artificial light propagating towards the night sky can be scattered back to Earth and reach ecosystems tens of kilometres away from the original light source. This phenomenon is known as artificial skyglow. Its consequences on freshwaters are largely unknown. In a large-scale lake enclosure experiment, we found that skyglow at levels of 0.06 and 6 lux increased the abundance of anoxygenic aerobic phototrophs and cyanobacteria by 32 (+/- 22) times. An ecosystem metabolome analysis revealed that skyglow increased the production of algal-derived metabolites, which appeared to stimulate heterotrophic activities as well. Furthermore, we found evidence that skyglow decreased the number of bacteria-bacteria interactions. Effects of skyglow were more pronounced at night, suggesting that responses to skyglow can occur on short time scales. Overall, our results call for considering skyglow as a reality of increasing importance for microbial communities and carbon cycling in lake ecosystems.}, language = {en} } @article{FroschLindauer2025, author = {Frosch, Katharina and Lindauer, Friederike}, title = {Learning With Short Bursts: How Effectively Can We Build Competencies in Climate Change-Related Areas Based on Microlearning?}, series = {European Journal of Education}, volume = {60}, journal = {European Journal of Education}, number = {2}, publisher = {Wiley}, doi = {10.1111/ejed.70088}, pages = {1 -- 17}, year = {2025}, abstract = {The study examines the effectiveness of microlearning in developing the capacity to address climate change and adapt to environmental challenges. Conducted as an online field experiment with 140 participants, the study focused on the impacts of smartphone use as an illustrative learning domain for education in climate change-related areas. Using a pre-post research design and simultaneous equation models, the study found improvements in knowledge retention, with a median increase of 38\%. The results indicated that the brief microlearning units also promoted sustainability action competencies, such as confidence in one's influence and willingness to act sustainably. This suggests that higher-order learning processes were also triggered, although to a much lesser extent. Furthermore, learner satisfaction was identified as a mediating variable for these positive outcomes. The study concludes that short bursts of knowledge delivered through microlearning activities can be used alongside traditional training methods to build the critical skills needed for initiatives such as the EU Green Deal.}, language = {en} } @article{GieslerPeschWeirauchetal.2020, author = {Giesler, Jasper and Pesch, Georg R. and Weirauch, Laura and Schmidt, Marc-Peter and Th{\"o}ming, Jorg and Baune, Michae}, title = {Polarizability-Dependent Sorting of Microparticles Using Continuous-Flow Dielectrophoretic Chromatography with a Frequency Modulation Method}, series = {Micromachines}, volume = {11}, journal = {Micromachines}, number = {1}, publisher = {MDPI}, doi = {10.3390/mi11010038}, pages = {38}, year = {2020}, language = {en} } @article{GoschinVogelFlassig2022, author = {Goschin, Tobias and Vogel, Mathias and Flassig, Robert}, title = {Energy Technologies For Decarbonizing The Steel Processing Industry - A Numerical Study}, series = {IFAC-PapersOnLine}, volume = {55}, journal = {IFAC-PapersOnLine}, number = {9}, publisher = {Elsevier}, doi = {https://doi.org/10.1016/j.ifacol.2022.07.001}, pages = {1 -- 5}, year = {2022}, abstract = {This study analyzes approaches to decarbonize the energy supply of the secondary steel processing industry. Therefore, real data from a secondary steel production company is used in combination with state-of-the art low carbon energy supply technologies. Also, the use of waste heat from a pusher furnace for process integration is considered. The developed temporal process model allows holistic optimizing and expanding the steel making process system regarding techno-economic criteria. As we show, implementing the annual heat demand of a municipality shows that a nearly 100 \% self-sufficient heat supply is possible.}, language = {en} } @article{HanXiangGuterding2025, author = {Han-Xiang, Xu and Guterding, Daniel}, title = {Incommensurate spin fluctuations and competing pairing symmetries in La3⁢Ni2⁢O7}, series = {Physical Review B}, volume = {112}, journal = {Physical Review B}, number = {17}, publisher = {American Physical Society}, doi = {10.1103/f6nj-34th}, pages = {8}, year = {2025}, abstract = {The recent discovery of superconductivity in the bilayer Ruddlesden-Popper nickelate La3⁢Ni2⁢O7 under high pressure has generated much interest in the superconducting pairing mechanism of nickelates. Despite extensive work, the superconducting pairing symmetry in La3⁢Ni2⁢O7 remains unresolved, with conflicting results even for identical methods. We argue that different superconducting states in La3⁢Ni2⁢O7 are in close competition and highly sensitive to the choice of interaction parameters as well as pressure-induced changes in the electronic structure. Our study uses a multiorbital Hubbard model, incorporating all Ni 3⁢𝑑 and O 2⁢𝑝 states. We analyze the superconducting pairing mechanism of La3⁢Ni2⁢O7 within the random phase approximation and find a transition between 𝑑-wave and sign-changing 𝑠-wave pairing states as a function of pressure and interaction parameters, which is driven by spin fluctuations with different wave vectors. These spin fluctuations with incommensurate wave vectors cooperatively stabilize a superconducting order parameter with 𝑑𝑥2-𝑦2 symmetry for realistic model parameters. Simultaneously, their competition may be responsible for the absence of magnetic order in La3⁢Ni2⁢O7, demonstrating that magnetic frustration and superconducting pairing can arise from the same set of incommensurate spin fluctuations.}, language = {en} } @article{HarthTrittelMohammadietal.2025, author = {Harth, Kirsten and Trittel, Torsten and Mohammadi, Mahdieh and Puzyrev, Dmitry and Enezz, Mohammad and Cruz Hidalgo, Raul and Stannarius, Ralf}, title = {Granular gases of rough spheres: Velocity, rotation and collision statistics from in-situ measurements, optical data and simulations}, series = {EPJ Web of Conferences}, volume = {340}, journal = {EPJ Web of Conferences}, editor = {Alam, M. and Das, S.L. and Bose, M. and Murthy, T.G. and Chikkadi, V. and Singh, A. and Luding, S.}, publisher = {EDP Sciences}, doi = {10.1051/epjconf/202534003012}, year = {2025}, abstract = {Granular gases are not only of interest in fundamental physics, but they can also serve as a test ensembles for the validity of collision models employed in (loose) granular matter. The theoretical literature mainly addresses spheres under ideal conditions and simulations allow full access to all particle parameters, but experiments cannot fulfill these idealizations. We investigate granular gases of soft, rough spheres by combining microgravity experiments and adjusted simulations. We introduce Smart Particles with embedded autarkic micro-sensors for in-situ measurements of rotation rates and accelerations. Additionally, we extract 3D positions, translations and orientations of the particles from stereoscopic video data using Machine-Learning based algorithms. We address the partition of kinetic energy between the degrees of freedom, the angular and translational velocity as well as collision statistics. A simulation is adjusted to experiment parameters, showing good agreement of translational motion, but qualitative differences in the decay of rotational kinetic energy.}, language = {en} } @article{HascheBenningCreutzburg2020, author = {Hasche, Eberhard and Benning, Dominik and Creutzburg, Reiner}, title = {Using ACES Look Modification Transforms (LMTs) in a Visual Effects Production Environment -Part 1: Rec.709 Inputsand Outputs}, series = {Electronic Imaging}, journal = {Electronic Imaging}, publisher = {Society for Imaging Science and Technology}, address = {Springfield, VA}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2020.3.MOBMU-205}, pages = {205-1 -- 205-14}, year = {2020}, language = {en} }