@inproceedings{65178,
  abstract     = {{Large intermediate results can cause join queries to run unexpectedly long. This problem is particularly common for analytical queries, which aggregate data over many tables to produce a comparatively small final output, and queries on graph data, where intermediate results blow up quickly. Recent work inspired by Yannakakis’ algorithm approaches this by modifying the query engine to avoid materializing unnecessary tuples. However, this requires significant changes to the core of the system, which is not feasible in many situations such as cloud environments or proprietary systems.
In this work, we propose a flexible approach for optimizing long-running join queries from the outside of the DBMS. Rewriting-based realizations of Yannakakis’ algorithm suffer from inherent overhead due to the creation of intermediate tables. Thus, we present an approach for detecting and targeting queries which would benefit from a Yannakakis-style optimization. We introduce a new benchmark combining 5 standard benchmarks and augmenting them with additional instances, which provides a sufficient size and diversity for a machine learning based solution. On PostgreSQL, DuckDB and SparkSQL, slowdowns on queries where the rewriting is counterproductive are mostly avoided, as opposed to a naïve application of the rewriting, and we observe significant improvements in end-to-end runtimes over standard query execution and unconditional rewriting.}},
  author       = {{Böhm, Daniela and Gottlob, Georg and Lanzinger, Matthias and Longo, Davide Mario and Okulmus, Cem and Pichler, Reinhard and Selzer, Alexander}},
  booktitle    = {{Proceedings of the 28th International Workshop on Design, Optimization, Languages and Analytical Processing of Big Data (DOLAP 2026)}},
  keywords     = {{Join Queries, Acyclic Queries, Query Processing}},
  title        = {{{Selective Use of Yannakakis’ Algorithm for Consistent Performance Gains}}},
  year         = {{2026}},
}

@article{65179,
  author       = {{Fuchs, Christian}},
  journal      = {{tripleC: Communication, Capitalism & Critique}},
  number       = {{1}},
  pages        = {{54--72}},
  title        = {{{Reason and Communication: Jürgen Habermas’s Legacy for Media and Communication Studies}}},
  doi          = {{10.31269/7112an90}},
  volume       = {{24}},
  year         = {{2026}},
}

@techreport{65180,
  author       = {{Terfloth, Lutz and Buhl, Heike M. and Lohmer, Vivien and Schaffer, Michael and Kern, Frederike and Schulte, Carsten}},
  title        = {{{Bridging the Dual Nature: How Integrated Explanations Enhance Understanding of Technical Artifacts}}},
  year         = {{2026}},
}

@article{65120,
  abstract     = {{The governance of emerging technologies with increased autonomy in the military has become a topical issue in recent years, especially considering the rapid advances in artificial intelligence and related innovations in computer science. Despite this hype, the postcolonial subject’s position has been seen as secondary, often associated with victimhood or obscurity. By shifting the narrative to highlight the postcolonial subject’s agency—not only in providing real-world examples of artificial intelligence use in the military but also in knowledge creation and shaping the discourse on governance within the international, this paper contributes to an area of research that is often overlooked. The paper unpacks the norm-making efforts of postcolonial subjects regarding emerging military technologies. In doing this, the paper aims to advance postcolonial theory by showing how the dynamics of governing emerging military technologies intertwine with postcolonial subjectivity and to broaden the academic discussion on the governance of emerging military technologies and algorithmic violence, which has so far been dominated by Western or universalistic discourse.}},
  author       = {{Bhila, Ishmael}},
  issn         = {{2730-5953}},
  journal      = {{AI and Ethics}},
  number       = {{2}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Decentring the governance of AI in the military: a focus on the postcolonial subject}}},
  doi          = {{10.1007/s43681-026-01090-7}},
  volume       = {{6}},
  year         = {{2026}},
}

@article{57580,
  abstract     = {{We investigate dispersive and Strichartz estimates for the Schrödinger equation involving the fractional Laplacian in real hyperbolic spaces and their discrete analogues, homogeneous trees. Due to the Knapp phenomenon, the Strichartz estimates on Euclidean spaces for the fractional Laplacian exhibit loss of derivatives. A similar phenomenon appears on real hyperbolic spaces. However, such a loss disappears on homogeneous trees, due to the triviality of the estimates for small times.}},
  author       = {{Palmirotta, Guendalina and Sire, Yannick and Anker, Jean-Philippe}},
  journal      = {{Journal of Differential Equations}},
  keywords     = {{Schrödinger equation, Fractional Laplacian, Dispersive estimates, Strichartz estimates, Real hyperbolic spaces, Homogeneous trees}},
  publisher    = {{Elsevier}},
  title        = {{{The Schrödinger equation with fractional Laplacian on hyperbolic spaces and homogeneous trees}}},
  doi          = {{10.1016/j.jde.2025.114065}},
  year         = {{2026}},
}

@unpublished{65232,
  abstract     = {{On finite regular graphs, we construct Patterson-Sullivan distributions associated with eigenfunctions of the discrete Laplace operator via their boundary values on the phase space. These distributions are closely related to Wigner distributions defined via a pseudo-differential calculus on graphs, which appear naturally in the study of quantum chaos. Using a pairing formula, we prove that Patterson-Sullivan distributions are also related to invariant Ruelle distributions arising from the transfer operator of the geodesic flow on the shift space. Both relationships provide discrete analogues of results for compact hyperbolic surfaces obtained by Anantharaman-Zelditch and by Guillarmou-Hilgert-Weich.}},
  author       = {{Arends, Christian and Palmirotta, Guendalina}},
  booktitle    = {{arXiv:2603.09779}},
  pages        = {{38}},
  title        = {{{Patterson-Sullivan distributions of finite regular graphs}}},
  year         = {{2026}},
}

@article{65134,
  author       = {{Fuchs, Christian}},
  journal      = {{Philosophy & Social Criticism}},
  title        = {{{Digital Fascism and Digital Capitalism}}},
  doi          = {{10.1177/01914537261434922}},
  year         = {{2026}},
}

@article{65264,
  author       = {{Lin-Januszewski, Liang-Wen}},
  issn         = {{0142-5692}},
  journal      = {{British Journal of Sociology of Education}},
  pages        = {{1--20}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Symbolic haunting: first-generation university students’ limited sense of entitlement}}},
  doi          = {{10.1080/01425692.2026.2615957}},
  year         = {{2026}},
}

@article{65263,
  author       = {{Fuchs, Christian}},
  journal      = {{tripleC: Communication, Capitalism & Critique}},
  number       = {{1}},
  pages        = {{141--199}},
  title        = {{{Digitaler Faschismus und digitaler Kapitalismus}}},
  volume       = {{24}},
  year         = {{2026}},
}

@inbook{65168,
  author       = {{Keuchen, Marion and Lindemeyer, Sabine}},
  booktitle    = {{Seelsorge im Lebensraum Schule. Ökumenische Perspektiven}},
  editor       = {{Igrec, Marie-Theres and Lehner-Hartmann, Andrea and Paulovics, Clemens and Rothgangel, Martin and Wenk, Anne-Kathrin}},
  isbn         = {{978-3-451-02651-5}},
  pages        = {{151--171}},
  publisher    = {{Herder}},
  title        = {{{Keuchen, Marion/ Lindemeyer, Sabine: Demokratiebildung anhand eines (schul-)seelsorglichen Rituals im Rahmen der Lehramtsausbildung}}},
  year         = {{2026}},
}

@article{65316,
  abstract     = {{Metasurfaces are powerful tools for manipulating light using small structures on the nanoscale. In most metasurfaces, near-field couplings are treated as being unfavorable perturbations. Here, we experimentally investigate a structure consisting of sinusoidally modulated silicon waveguides where near-field coupling of local resonances leads to negative coupling, i.e., a negative coupling constant. This gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular polarizations. In particular, fully circular polarization states are not only present at a single point in momentum space (k-space) but also along a line. This circular polarization line, as well as a linear polarization line, emanates from a polarization degeneracy at the Dirac point. We experimentally validate the existence of these eigenstates and demonstrate the energy-, polarization-, and wave vector dependence of this metasurface as well as its sensitivity to fabrication tolerances. By tuning the incident k-vector, certain polarization-energy eigenstates are strongly reflected, allowing for uses in angle-tunable polarization filters and light sources.}},
  author       = {{Wetter, Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher, Stefan and Zentgraf, Thomas}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}}},
  doi          = {{10.1021/acsphotonics.5c02865}},
  year         = {{2026}},
}

@inproceedings{61444,
  abstract     = {{Backchannels and fillers are important linguistic expressions in dialogue, but often treated as ‘noise’ to be bypassed in modern transformer-based language models. Our work studies the representation of them in language models using three fine-tuning strategies. The models are trained on three dialogue corpora in English and Japanese, where backchannels and fillers are preserved and annotated, to investigate how fine-tuning can help LMs learn their representations. We first apply clustering analysis to the learnt representation of backchannels and fillers, and have found increased silhouette scores in representations from fine-tuned models, which suggests that fine-tuning enables LMs to distinguish the nuanced semantic variation in different backchannel and filler use. We also use natural language generation (NLG) metrics and qualitative analysis to confirm that the utterances generated by fine-tuned language models resemble human-produced utterances more closely. Our findings suggest the potentials of transforming general LMs into conversational LMs that are more capable of producing human-like languages adequately.}},
  author       = {{Wang, Yu and Lao, Leyi and Huang, Langchu and Skantze, Gabriel and Xu, Yang and Buschmeier, Hendrik}},
  location     = {{San Diego, CA, USA}},
  title        = {{{Investigating the representation of backchannels and fillers in fine-tuned language models}}},
  year         = {{2026}},
}

@article{65270,
  abstract     = {{In perovskite solar cells (PSCs), electron transport layers (ETLs) play an important role in the selection and transport of electrons. Understanding the properties of these layers in relation to device performance is essential for optimizing solar cell efficiency and enabling their integration into emerging architectures, such as flexible solar cells. Here, we deposited TiO2 at different thicknesses using atomic layer deposition (ALD), a technique well-suited for producing uniform and pinhole-free films. The crystal structure of the layers was controlled by depositing the films at three different temperatures: 150 °C, 250 °C, and 350 °C. The layers were characterized in detail to determine the morphology (by atomic force microscopy), surface composition (by X-ray photoelectron spectroscopy) and the crystal structure (by X-ray diffraction). The TiO2 layers were then incorporated as ETLs in planar perovskite solar cells to evaluate their influence on device performance. Higher deposition temperatures led to improvements in device fill factor and open-circuit voltage, leading to more efficient solar cells. Notably, the best device performance for the ALD-TiO2 layers was achieved with films deposited at 250 °C.}},
  author       = {{Qudsia, Syeda and Weiss, Alexander and Sirkiä, Saara and Wang, Fuzeng and Rosqvist, Emil and Los Arcos, Teresa De and Weinberger, Christian and Halme, Janne and Kemell, Marianna and Smått, Jan-Henrik}},
  issn         = {{0169-4332}},
  journal      = {{Applied Surface Science}},
  keywords     = {{Titanium dioxide, Atomic layer deposition, Electron transport layer, Perovskite solar cells}},
  pages        = {{166755}},
  title        = {{{Influence of deposition temperature and thickness of ALD-TiO2 on planar perovskite solar cell performance}}},
  doi          = {{https://doi.org/10.1016/j.apsusc.2026.166755}},
  year         = {{2026}},
}

@inbook{44862,
  author       = {{Peckhaus, Volker}},
  booktitle    = {{New Perspectives on Neo-Kantianism and the Sciences}},
  editor       = {{Pulte, Helmut  and Baedke, Jan and Koenig, Daniel and Nickel, Gregor}},
  pages        = {{17--37}},
  publisher    = {{Routledge}},
  title        = {{{(Neo-)Kantian Foundation of Foundations: The Göttingen Case}}},
  year         = {{2025}},
}

@article{32099,
  author       = {{Weich, Tobias and Budde, Julia}},
  journal      = {{Journal of Functional Analysis}},
  number       = {{1}},
  title        = {{{Wave Front Sets of Nilpotent Lie Group Representations}}},
  doi          = {{ https://doi.org/10.1016/j.jfa.2024.110684}},
  volume       = {{288}},
  year         = {{2025}},
}

@article{56265,
  abstract     = {{The metal-organic framework CPO-27 exhibits free coordination sites (open metal sites) and can be prepared with a wide range of metals that influence its properties. It is therefore an intriguing structure to study sorption phenomena. We analyze the water resistance and sorption behavior of these frameworks, with particular attention to the sorption mechanism in detail and the structure of the confined water molecules. For this purpose, we use manometric water vapor sorption analysis and FTIR spectroscopy. The respective metal center orchestrates both the adsorption behavior and the arrangement of the water molecules in the micropores of the framework. The extent to which water molecules form hydrogen bonds (with each other and with framework oxygen atoms) plays a crucial role in the stability of the framework towards water. Water adsorption is governed by the coordination of water molecules to the open metal sites (except for CPO-27-Cu) and subsequent H-bonding. A stepwise adsorption of water is observed, with significant differences depending on the choice of metal.}},
  author       = {{Kloß, Marvin and Weinberger, Christian and Tiemann, Michael}},
  issn         = {{1387-1811}},
  journal      = {{Microporous and Mesoporous Materials}},
  pages        = {{113352}},
  publisher    = {{Elsevier BV}},
  title        = {{{Water in the Micropores of CPO-27 Metal-Organic Frameworks: A Comprehensive Study}}},
  doi          = {{10.1016/j.micromeso.2024.113352}},
  volume       = {{381}},
  year         = {{2025}},
}

@article{58351,
  author       = {{Godau, Marc and Maxelon, Dominik and Neuhausen, Timo}},
  journal      = {{Auditive Medienkulturen. ‘The Evolution of Sound’? Soundkulturelle Praktiken in Social Media-Mikroformaten}},
  keywords     = {{Algorithmen, Musikpraxis, Postdigitalität, Songwriting, TikTok}},
  title        = {{{Algorithmische Hyperawareness im Songwriting von Plattform-Musiker:innen. Postdigitale Subjektivität und die Transformation musikkultureller Praktiken auf TikTok und Co.}}},
  year         = {{2025}},
}

@article{58353,
  abstract     = {{<jats:title>Abstract</jats:title>
          <jats:p>Statistics and machine learning are critical because they play an essential role in our everyday lives and the careers we may pursue in the future. It may be beneficial to introduce machine learning, such as decision trees (DTs), at an early stage of education. The data-based construction of DTs is an example of a machine learning process, which can be addressed in mathematics or statistics teaching because of relatively low prior knowledge requirements. This paper focuses on investigating how sixth-grade students create and evaluate data-based DTs. The basis is a teaching unit that aims to lay the foundation for machine learning and enhance students’ understanding of the process. We investigate students’ processes in detail while they build DTs with data cards about food items to predict whether a new item is recommendable. After the teaching unit, an interview study examines students’ strategies for creating decision trees. The findings contribute to understanding students’ learning processes and the challenges when working with decision trees.</jats:p>}},
  author       = {{Podworny, Susanne and Biehler, Rolf and Fleischer, Yannik}},
  issn         = {{1863-9690}},
  journal      = {{ZDM – Mathematics Education}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Young students’ engagement with data to create decision trees}}},
  doi          = {{10.1007/s11858-024-01649-w}},
  year         = {{2025}},
}

@article{58347,
  author       = {{Godau, Marc and Gosmann, Phillip}},
  journal      = {{Auditive Medienkulturen. ‘The Evolution of Sound’? Soundkulturelle Praktiken in Social Media-Mikroformaten}},
  keywords     = {{Edugram, Instagram, Musiktheorie, Postdigitalität, Social Media}},
  publisher    = {{Auditive Medienkulturen}},
  title        = {{{Social Media Music Theory. Musiktheorie auf Instagram als Teil einer Musikpädagogik im Zeitalter der Postdigitalität}}},
  year         = {{2025}},
}

@article{54450,
  abstract     = {{In the last decade, there has been increasing interest in allowing users to understand how the predictions of machine-learned models come about, thus increasing transparency and empowering users to understand and potentially contest those decisions.Dialogue-based approaches, in contrast to traditional one-shot eXplainable Artificial Intelligence (XAI) methods, facilitate interactive, in-depth exploration through multi-turn dialogues, simulating expert conversations. This paper reviews the current state of dialogue-based XAI, presenting a systematic review of 1,339 publications, narrowed down to 14 based on inclusion criteria. We explore theoretical foundations of the systems, propose key dimensions along which different solutions to dialogue-based XAI differ, and identify key use cases, target audiences, system components, and the types of supported queries and responses. Furthermore, we investigate the current paradigms by which systems are evaluated and highlight their key limitations. Key findings include identifying the main use cases, objectives, and audiences targeted by dialogue-based XAI methods, and summarize the main types of questions and information needs. Beyond discussing avenues for future work, we present a meta-architecture for these systems from existing literature and outlined prevalent theoretical frameworks.}},
  author       = {{Mindlin, Dimitry and Beer, Fabian and Sieger, Leonie Nora and Heindorf, Stefan and Cimiano, Philipp and Esposito, Elena and Ngonga Ngomo, Axel-Cyrille}},
  journal      = {{Artificial Intelligence Review}},
  number       = {{3}},
  publisher    = {{Springer}},
  title        = {{{Beyond One-Shot Explanations: A Systematic Literature Review of Dialogue-Based XAI Approaches}}},
  doi          = {{10.1007/s10462-024-11007-7}},
  volume       = {{58}},
  year         = {{2025}},
}