Forecasting of the Traffic Situation in the Hannover Region

The main requirement of road traffic participants is to know the current traffic situation. Such data is typically obtained from routing services where the time of many different individual trips is taken into account.

In the context of Data4UrbanMobility tools were developed that allow to predict the traffic situation based on such time series data. The following figure presents an interface to visualize typical time series patterns as well as outliers present in the data:

The prediction of the traffic situation is made available in the form of a map based interface for the end user:

Data4UrbanMobility Data Protection Regulation

The work on the Data4UrbanMobility data protection regulation is completed. The document is publicly available and can be found here.

First Version of MiC-App Available

A first version of the novel MiC-App (Move in the City) App is now available for D4UM-associates as well as a protected group of public users. The mobile MiC-App is a tool to gather data.

MiC was developed by the Institute for Sustainable Urbanism at the University of Braunschweig and the Projektionisten GmbH. MiC links the growing  awareness of  digital citizen rights with the potential of evaluation big datasets. Therefore MiC gives the opportunity to citizen to actively participate in a citizen science project to take part in the development of the mobility of the feature.

MiC gathers data of the users movement, where the user has the about which data should be recorded. All data is pseudonymised such that the privacy of the contributing citizen is ensured.

Current Status:

In the first version of the app, the user can easily start and end the tracking of his/her movement. It is worth to point out, that the user decides when he is tracked and when not. A summary of his/her activity is available for the user as well as the opportunity to issue feedback or even delete all of his contributed data.

Updated System with Dashboard V2

With the new version of our system,  the dashboard will provide even more insights into the impact of public events on the traffic situation.

The coloring and labels let us easily distinguish between the different type of events. By clicking on the label we show the typically affected subgraph for that event type. This allows the user to check what specific routes are typically affected by an event at that location.

Examples: Visualisation of a concert and a football game.

In addition, the graph at the top right gives additional information on how big the impact around the events start time tends to be.

{API}
We enriched the api endpoints with additional information from the data models that were developed as part of the research efforts.

D4UM App Version 1.0

We just released the first Version of the D4UM App. Every project member now has access to the application and can try out its features. Let’s quickly go over some of its main features.
The EFA integration (EFA is a routing engine covering Lower Saxony and Bremen ) allows for quick access to tip information using all available public transport options. Our focus, when designing the application, was on quick and easy navigation to provide a simple and easy to use trip planning tool.

Departures and Connections

On the departure screen we show the user the closes stops for public transportation in his immediate vicinity. On the connection screen the user can fill in his desired starting location( either an address or an existing stop ) and destination and query for what connections are available to him. The provided information contains real time data , meaning we are able to visualized delays for any given connection.

Map

On the map screen you can see and or find all available stops of public transportation. This allows for providing the user with a great way to find out what stops are available in their city. By clicking on any of the shown stops will open the departure screen and provide you with the information mentioned above. To better visualize a selected connection, we show the route you plan to travel on the map.

Menu / Settings

Additional features can be found in the settings menu of the application. Here you can find settings that allow you to customize your routing results for both the departures and connection screen. The best way to let us know what you think about the application is to use the feedback module. This can be found here as well. First click on the emoji that best describe how you feel about the app. And then put in any additional information or ideas or thoughts you may have. Now what is left is just to press send and you will send us an email.

We look forward to hearing from you.

Quantification  and Prediction of Impact of Public Events

Current Data4UrbanMobility research results allow for measuring and prediction of spatial impact on road traffic of public events. Connected, affected street segments nearby public events are identified to measure the spatial impact. The approach is depicted in the following figure:

(Karte von https://www.openstreetmap.org)

An event is marked as yellow dot, affected streets in red and the measured impact in dark blue. Moreover, an approach making use of machine learning algorithms was developed to predict the impact determined in this way, resulting an error-reduction of up to 40% when compared to existing state-of-the-art approaches.

D4UM – Platform V1 Released

The first version of the Data4UrbanMobiltiy platform has been released. The platform was designed and implemented following a 3-tier-architecture. The platform provides RESTfull Web services for mobility applications like dashboards or mobile apps. As a demonstration, an interactive map application has been developed that visualizes the spatial impact of public events. The following figure shows a screenshot of the application.

The figure shows 4 public events in the city of Hannover. The colors represent different types of public events (e.g. concerts, fairs, sport events). The circles visualize the spatial impact on road traffic caused by the public events.

Comprehensive Set of Requirements

The Data4UrbanMobility analysis of requirements includes requirements of the application partners Region Hannover (RH) and Wolfsburg AG (WAG) as well as non functional requirements. The requirements were collected by MOMA. The L3S derived research question for data analysis which are based  on the requirements of RH and WAG. The research question address especially the information needs of end-users.

The current research questions particularly include

1. Automated verification of traffic warnings and prediction of their impact
2. Identification of events and prediction of their impact
3. Investigation of correlation of road traffic data, public transportation query logs, traffic warnings and twitterfeeds
4. Determination of optimal traveling timepoints

Growing Data Collection

ISU create a comprehensive data matrix containing potential source of mobility related data. The Data4UrbanMobility data model describes all project relevant data sets and sets them into context. This makes the data available in a unified manor for both analysis and applications. The selected data sources were transformed according to the Data4UrbanMobility data model by L3S. The data quality of selected data sources (i.e. public transportation query logs and road traffic data) was examined.

Tools for extracting the relevant information from the datasets were developed to enable the integration of the datasets.

• Street and graph extraction from OpenStreetMap
• Bulkloader for public transportation queries
• Integration of “Zentrales Haltestellen Verzeichniss” (central registry of public transportation stops)

The current collection (December 12th 2017) contians

EFA-Logs: 17 million public transportation queries
Road traffic data: 174 thousand street sements with a frequency of 15 minutes
GTFS-data: 90 thousand. public transportation stops, 2.6 thousand routes
Weather: Radolan “Regenraster” (rain grid)
Twitter: 2,5 Mio. Tweets starting at June 2017

OSM: 440 thousand streets 
Events: 21 thousand public events (August 14th 2016-July 17th 2018)

Traffic warnings: 13 thousand warning (since June 2017)

Visualization of Public Transportation Information

In order to allow intuitive analytics of public transportation information, the PROJEKTIONISTEN (PROJ) developed a dashboard web application. First prototypes visualize queries addressed to the regional timetable information system EFA (www.efa.de). The prototypes serve as foundations for exploration analyses as well as the implementation of future versions of the dashboard. The following figure shows an integrated visualization of the most frequent origins and destinations of the queries.

Analysen der EFA-Logs

Analysis of EFA Public Transportation Query Logs

Analyses regarding the impact of public events on public transportation are currently conducted to address early research questions. To this extend, explorative data analyses of the impact of major public events such as football games and medium sized events such as concerts were conducted. Visual analytics were used as a first step towards comprehensive analyses, which show start-like patterns for city center which identify mobility hubs of central importance.

The figure shows the direct connection between origin and destination of public transportation queries. Darker colors correspond to more frequent queried trips. Star-like pattern identify the central train station and the central metro station.

Analyses of single stations reveal weekday dependent patterns.

The figure depicts the average number of queries with the destination “Hannover Stadionbrücke”. Differences emerge between Weekends and workdays.

The impact of public events on the queries can be visualized  as well.

The figure shows the number of queries with the Destination “Hannover Stadionbrücke” for Wednesday, April 26th 2017 (orange) as well as the average number of queries on a Wednesday for the same destination. On this day a concert took place in venue nearby. The concert start at 8 pm. The significant deviations between 5 pm and 7 pm is highly likely to be caused by visitors of the concert. This shows that public transportation queries are a valuable information source to investigate the impact of public events on mobility infrastructure.

• The Study of Artificial Intelligent Building Automation Control System in Hong Kong Commercial Building. Tsang, Tony; Fai, Chang Kam (2025).
• Architecting Intelligent Decentralized Data Systems to Enable Analytics with Entropy-Aware Governance, Quantum Readiness and LLM-Driven Federation. Schnabel, Ralf (2025). 17(1/2) 17–23.

  Enterprises pursuing AI-driven transformation face a critical tradeoff: centralized consistency vs. decentralized scalability. The "Data Platform Unification Paradox" captures this dilemma. Building on our prior NLPI 2025 paper, this extended version integrates technical depth, mathematical models, and concrete architectures, especially for integrating Data Mesh with Quantum Databases and LLM Agents. A federated architecture is proposed using graph-theoretic models and entropy-based data valuation. We introduce a formal structure to evaluate platform complexity and propose intelligent agent-based governance models to operationalize data sharing across domains. This work aims to move beyond conceptual frameworks by proposing actionable blueprints for next-generation, intelligent data ecosystems.
• Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV\($_\mathbf3$\)Sb\($_\mathbf5$\). Kurtz, Felix; von Witte, Gevin; Jehn, Lukas; Akbiyik, Alp; Vinograd, Igor; Le Tacon, Matthieu; Haghighirad, Amir A.; Chen, Dong; Shekhar, Chandra; Felser, Claudia; Ropers, Claus (2025). 111(14) L140101.
• Tunable second harmonic in altermagnetic Josephson junctions. Sun, Hai-Peng; Zhang, Song-Bo; Li, Chang-An; Trauzettel, Björn (2025). 111(16) 165406.
• Correlated proton disorder in the crystal structure of the double hydroxide perovskite CuSn(OH)\($_\mathbf6$\). Kulbakov, Anton A.; Häußler, Ellen; Parui, Kaushick K.; Chakkingal, Aswathi Mannathanath; Pavlovskii, Nikolai S.; Pomjakushin, Vladimir Yu.; Cañadillas Delgado, Laura; Hansen, Thomas; Peets, Darren C.; Doert, Thomas; Inosov, Dmytro S. (2025). 9(3) 033603.
• Fermi surfaces of the nodal-line candidates CaCdGe and CaCdSn: Discrepancy between band structure calculations and quantum oscillation measurements. Schwarze, B. V.; Husstedt, F.; Chekhonin, P.; Galeski, S.; Helm, T.; Liu, J.; Prots, Yu.; Romanova, T.; Uhlarz, M.; Zimmermann, M. v.; Kaczorowski, D.; Wosnitza, J. (2025). 111(15) 155154.
• Coexistence of antiferromagnetism and ferrimagnetism in adjacent honeycomb layers. Szaller, D.; Prodan, L.; Geirhos, K.; Felea, V.; Skourski, Y.; Gorbunov, D.; Förster, T.; Helm, T.; Nomura, T.; Miyata, A.; Zherlitsyn, S.; Wosnitza, J.; Tsirlin, A. A.; Tsurkan, V.; Kézsmárki, I. (2025). 111(18) 184404.
• Reindex-Then-Adapt: Improving Large Language Models for Conversational Recommendation. He, Zhankui; Xie, Zhouhang; Steck, Harald; Liang, Dawen; Jha, Rahul; Kallus, Nathan; McAuley, Julian in WSDM ’25 (2025). 866–875.

  Large Language Models (LLMs) are revolutionizing conversational recommender systems (CRS) by effectively indexing item content, understanding complex conversational contexts, and generating relevant item titles. However, the autoregressive nature of LLMs, which outputs item titles as a long sequence of subtokens, hinders the ability to efficiently obtain and control recommendations across the entire item set. This challenge in calculating probabilities over all items limits LLMs' potential, such as (1) limiting control over recommendation popularities and (2) preventing the synergy of marrying LLMs and traditional recommender systems (RecSys).To address this challenge, we propose the Reindex-Then-Adapt (RTA) framework. It consists of two steps: (1) Reindex: a lightweight network learns to condense multi-token item titles into single tokens within the LLM and distills LLM-generated recommendations as ranked lists. This bypasses the autoregressive nature of LLMs while trying to preserve their CRS abilities; (2) Adapt: LLMs after reindexing enable efficient adjustment of probability distributions over single-token titles, further enhanced through RecSys integration. RTA bridges the strengths of LLMs and RecSys, enabling understanding of complex queries as LLMs do, while efficiently controlling recommended item distributions as in traditional RecSys. We show the effectiveness of our RTA over base LLMs across three CRS datasets with negligible additional parameters.
• Pace Layers and Research Products. Chatting, David; Claisse, Caroline; Wolf, Sara; Morris, Ben; Durrant, Abigail C (2025).
• Pace Layers and Research Products. Chatting, David; Claisse, Caroline; Wolf, Sara; Morris, Ben; Durrant, Abigail C (2025).
• Failing to See the Obvious? How Financial Crypto Literacy Shapes the Future of FinTech Platforms in the Disruptive Blockchain Era Zeiß, Christian (2025).
• Efficient Algorithms for Isogeny Computation on Hyperelliptic Curves: Their Applications in Post-Quantum Cryptography. Baraka, Mohammed El; Ezzouak, Siham in LNCS, N. Meghanathan (ed.) (2025). (Vol. 17) 93–112.

  We present efficient algorithms for computing isogenies between hyperelliptic curves, leveraging higher genus curves to enhance cryptographic protocols in the post-quantum context. Our algorithms reduce the computational complexity of isogeny computations from O(g4) to O(g3) operations for genus 2 curves, achieving significant efficiency gains over traditional elliptic curve methods. Detailed pseudocode and comprehensive complexity analyses demonstrate these improvements both theoretically and empirically. Additionally, we provide a thorough security analysis, including proofs of resistance to quantum attacks such as Shor's and Grover's algorithms. Our findings establish hyperelliptic isogeny-based cryptography as a promising candidate for secure and efficient post-quantum cryptographic systems.
• Warmer temperatures reinforce negative land-use impacts on bees, but not on higher insect trophic levels. Ganuza, Cristina; Redlich, Sarah; Rojas-Botero, Sandra; Tobisch, Cynthia; Zhang, Jie; Benjamin, Caryl; Englmeier, Jana; Ewald, Jörg; Fricke, Ute; Haensel, Maria; Kollmann, Johannes; Riebl, Rebekka; Schiele, Susanne; Uhler, Johannes; Uphus, Lars; Müller, Jörg; Steffan-Dewenter, Ingolf (2025). 292(2046)
• Large Language Models: The best linguistic theory, a wrong linguistic theory, or no theory at all?. Müller, Stefan (2025). 44(1)

  This paper discusses the claim that Large Language Models (LLMs) are the best linguistic theory we currently have. It discusses claims that LLMs are wrong linguistic theories and concludes that they are not linguistic theories at all. It is pointed out that Chomsky’s claims about innateness, about transformations as underlying mechanisms of the language faculty and about plausible representations of linguistic knowledge have been known to be flawed for quite some time by now and that we would not have needed LLMs for this. Chomsky’s theories are not refuted by LLMs in their current form since LLMs are different in many aspects from human brains. However, the tremendous success of LLMs in terms of applications makes it more plausible to linguists and laymen that the innateness claims are wrong. It is argued that the use of LLMs is probably limited when it comes to typological work and cross-linguistic generalizations. These require work in theoretical linguistics.
• Curvature-induced magnetization of altermagnetic films. Yershov, Kostiantyn V.; Gomonay, Olena; Sinova, Jairo; van den Brink, Jeroen; Kravchuk, Volodymyr P. (2025). 134(11) 116701.
• Chirality meets topology: building quantum bridges to catalysis. Wu, Xizheng; Wang, Xia; Felser, Claudia (2025).

  Topological materials, characterized by their symmetry-protected electronic properties, offer transformative opportunities to integrate solid-state topology and catalysis. When coupled with chirality, novel classes of chiral material systems emerge, including topological chiral materials and magnetic chiral materials, distinguished by their unique chiral-related phenomena. Investigating the role of structural and electronic chirality on chiral catalytic processes holds significant promise for designing advanced chiral catalysts. This review provides a comprehensive overview of intrinsic chiral materials with chiral space groups, accompanied by an in-depth analysis of their electronic chirality, including chiral spin angular momentum, chiral orbital angular momentum, chiral charge density waves, and chiral Weyl points. Moreover, we discuss various tuning knobs that induce chiral responses in topological materials. By offering fundamental insights into the interplay between chiral quantum phenomena and chiral catalytic efficiency, this review bridges chemistry and physics, offering strategies to optimize emerging chiral catalytic systems, such as spin-dependent catalysis and asymmetric synthesis.
• Observation of chiral surface state in superconducting NbGe\($_\mathbf2$\). Yao, Mengyu; Gutierrez-Amigo, Martin; Roychowdhury, Subhajit; Errea, Ion; Fedorov, Alexander; Strocov, Vladimir N.; Vergniory, Maia G.; Felser, Claudia (2025). 9(3) 034803.
• Topological phase diagram of mercury cadmium telluride quantum wells. Bovkun, L. S.; Fürst, L.; Fuchs, C.; Marković, V.; Hofer, M.; Siebert, M.; Berger, C.; Bayer, F.; Beugeling, W.; Schreyeck, S.; Buhmann, H.; Molenkamp, L. W.; Kießling, T. (2025). 9(5) 054602.
• Warmer temperatures reinforce negative land-use impacts on bees, but not on higher insect trophic levels. Ganuza, Cristina; Redlich, Sarah; Rojas-Botero, Sandra; Tobisch, Cynthia; Zhang, Jie; Benjamin, Caryl; Englmeier, Jana; Ewald, Jörg; Fricke, Ute; Haensel, Maria; Kollmann, Johannes; Riebl, Rebekka; Schiele, Susanne; Uhler, Johannes; Uphus, Lars; Müller, Jörg; Steffan-Dewenter, Ingolf (2025). 292(2046) 20243053.
• A shortcut to sample coverage standardization in metabarcoding data provides new insights into land-use effects on insect diversity. Kortmann, Mareike; Chao, Anne; Chiu, Chun-Huo; Heibl, Christoph; Mitesser, Oliver; Morinière, Jérôme; Bozicevic, Vedran; Hothorn, Torsten; Rothacher, Julia; Englmeier, Jana; Ewald, Jörg; Fricke, Ute; Ganuza, Cristina; Haensel, Maria; Moning, Christoph; Redlich, Sarah; Rojas-Botero, Sandra; Tobisch, Cynthia; Uhler, Johannes; Zhang, Jie; Steffan-Dewenter, Ingolf; Müller, Jörg (2025). 292(2046) 20242927.
• Fragile spin liquid in three dimensions. Fancelli, Anna; Flores-Calderón, R.; Benton, Owen; Lake, Bella; Moessner, Roderich; Reuther, Johannes (2025). 111(13) 134413.
• Selective directional enhancement in Gold/Perovskite quantum dot metasurfaces. Adnan, Mohammad; Sarkar, Swagato; Aftenieva, Olha; Brunner, Julius; Fery, Andreas; Vaynzof, Yana; König, Tobias A.F (2025). 13(13) 2403397-.

  Abstract Controlling directional radiation with minimal loss and fabrication effort through scalable methods is essential for integrating metasurfaces into photonic devices. Existing strategies enable tuning radiation properties by altering optical parameters of subwavelength dielectric gratings. Herein, a simple method is demonstrated to control the radiation direction of perovskite quantum dot (QD) metasurfaces through the addition of thin gold layers. This approach utilizes hybrid plasmonic modes and defect-free, template-assisted self-assembly techniques for low-loss, large-area production. This colloidal method allows precise control over nanostructure formation, ensuring reproducibility and enhanced optical properties. A 4.6-fold enhancement of the radiation toward the substrate and a 4.4-fold enhancement toward the cover region is achieved by evaporating a thin gold film with an optimal periodicity of 500 nm. Notably, the insertion of a metal layer allows the cover mode to exhibit enhancements that exceed typical expectations for plasmonic metasurfaces. This design is supported by plasmonic lattice theory and validated by electromagnetic modeling, allowing the gamma point to be customized to enhance emission in specific directions and media directly. This rational design strategy enhances the functionality of plasmonic perovskite-based metasurfaces for photonic on-chip applications, including nonlinear light-emitting devices and directional light sources.
• Contrastive Learning in Image Style Transfer: A Thorough Examination using CAST and UCAST Frameworks. Soniya, Raju; Babu, G (2025).
• Observation of the axion quasiparticle in 2D MnBi\($_\mathbf2$\)Te\($_\mathbf4$\). Qiu, Jian-Xiang; Ghosh, Barun; Schütte-Engel, Jan; Qian, Tiema; Smith, Michael; Yao, Yueh-Ting; Ahn, Junyeong; Liu, Yu-Fei; Gao, Anyuan; Tzschaschel, Christian; Li, Houchen; Petrides, Ioannis; Bérubé, Damien; Dinh, Thao; Huang, Tianye; Liebman, Olivia; Been, Emily M.; Blawat, Joanna M.; Watanabe, Kenji; Taniguchi, Takashi; Fong, Kin Chung; Lin, Hsin; Orth, Peter P.; Narang, Prineha; Felser, Claudia; Chang, Tay-Rong; McDonald, Ross; McQueeney, Robert J.; Bansil, Arun; Martin, Ivar; Ni, Ni; Ma, Qiong; Marsh, David J. E.; Vishwanath, Ashvin; Xu, Su-Yang (2025). 641(8061) 62–69.

  The axion is a hypothetical fundamental particle that is conjectured to correspond to the coherent oscillation of the \($\theta$\) field in quantum chromodynamics1,2. Its existence would solve multiple fundamental questions, including the strong CP problem of quantum chromodynamics and dark matter, but the axion has never been detected. Electrodynamics of condensed-matter systems can also give rise to a similar \($\theta$\), so far studied as a static, quantized value to characterize the topology of materials3--5. Coherent oscillation of \($\theta$\) in condensed matter has been proposed to lead to physics directly analogous to the high-energy axion particle---the dynamical axion quasiparticle (DAQ)6--23. Here we report the observation of the DAQ in MnBi2Te4. By combining a two-dimensional electronic device with ultrafast pump--probe optics, we observe a coherent oscillation of \($\theta$\) at about 44thinspacegigahertz, which is uniquely induced by its out-of-phase antiferromagnetic magnon. This represents direct evidence for the presence of the DAQ, which in two-dimensional MnBi2Te4 is found to arise from the magnon-induced coherent modulation of the Berry curvature. The DAQ also has implications in light--matter interaction and coherent antiferromagnetic spintronics24, as it might lead to axion polaritons and electric control of ultrafast spin polarization6,15--20. Finally, the DAQ could be used to detect axion particles21--23. We estimate the detection frequency range and sensitivity in the millielectronvolt regime, which has so far been poorly explored.
• Optical whispering-gallery mode as a fingerprint of magnetic ordering in van der Waals layered CrSBr. Pang, Chi; Li, Rang; Long, Fangchao; Li, Yi; Tang, Min; Soll, Aljoscha; Mosina, Kseniia; Sofer, Zdenek; Jamshidi, Kambiz; Chen, Feng; Vaynzof, Yana; Helm, Manfred; Zhou, Shengqiang; Ma, Libo (2025). n/a(n/a) 2505275-.

  Abstract An ultra-sensitive nanoscale magnetism sensing of van der Waals layered CrSBr is demonstrated by employing optical whispering-gallery-mode (WGM) resonances in a self-rolled-up microcavity. CrSBr nanoflakes with and without intercalation are probed by monitoring the WGM resonant modes shift as a function of magnetic field intensity and temperature, revealing the presence of ferromagnetic (FM) and antiferromagnetic (AFM) order. The minimum detectable amount of CrSBr nanoflakes reaches the femtogram scale, and the detection limit is as low as 1.25 ? 10?16 emu. This study demonstrates a promising application of WGM microcavities for highly sensitive magnetism detection with reduced system complexity, establishing a novel bridge between materials? optical and magnetic properties.
• Meissner effect in non-Hermitian superconductors. Tamura, Shun; Müller, Helene; Aliani, Linus; Kornich, Viktoriia (2025). 111(18) L180503.
• Machine Learning: a Lecture Note. Cho, Kyunghyun (2025).
• Size Doesn’t Matter? Down-Scaling a Data Physicalization Does Not Measurably Change Viewers’ Mediated Social Interactions. Friedenberger, Tamara; Hurtienne, Jörn in TEI ’25 (2025).

  Data physicalizations are physical artifacts that represent data across sensory modalities. They are frequently used in informal learning environments, such as museums, which are inherently social spaces. Research on the design choices for data physicalizations and their effects in social contexts is sparse. Previous work examining the size of data physicalizations shows a tendency to favor larger designs to increase artefact-mediated social interactions among viewers (social engagement), but the empirical evidence remains inconclusive. To address this, we empirically investigated the effect of data physicalization size on social engagement and user experience. In this laboratory study, the social engagement between two viewers freely interacting with a data physicalization is analyzed across two sizes. The results do not indicate a clear advantage of a larger design for increasing social engagement. Thus, investing additional effort and material resources in making a physicalization larger would compromise sustainability for no measurable change in social engagement.
• Wax Arts With Honeybees – Taking First Steps Toward Multispecies Co-Creation. Huber, Stephan; Friedenberger, Tamara; Borlinghaus, Parzival; Wolf, Sara in TEI ’25 (2025).

  Centuries of beekeeping restricted the honeybees’ role to a producer of raw material, such as honey or wax, which is then harvested and processed, resulting in all artistic value being added by humans. In this project, we regard honeybees (Apis mellifera) as co-creators and explore the joint creations of our two species. During our first season, we scoped the co-creative space over the course of four months. We present image material of sculptures that exceed bees’ natural building behavior and contribute preliminary insights on artifacts originating from human-bee co-creation. We reflect on how human-introduced wax shapes made the bees deviate from their regular comb forms and discuss future paths of multi-species co-creation, temporality, material as well as ethical aspects. Our preliminary insights raise questions to be developed in discussions with the TEI community and answered in future work during the upcoming bee seasons.
• Segen Interaktiv: die Interdisziplinäre Entwicklung Eines Außerschulischen Lernortes zu Interreligiösen Segensräumen. Nord, Ilona; Wolf, Sara; Luthe, Simon; Hurtienne, Jörn; Schleier, Leon A. Füting-Lippert, M. Eisenmann, S. Grafe, H.-S. Siller, T. Trefzger (eds.) (2025). 121–139.

  Religionskulturen nehmen zunehmend Designformate von Digital Religion an. Dabei zeigt sich als religionspädagogisch nahezu unerforscht die didaktisch reflektierte User Experience und das Design von digitalen Lehr- und Lernszenarien. AP6 geht aus der Perspektive der interdisziplinären Zusammenarbeit von Human--Computer Interaction und Ev. Religionspädagogik davon aus, dass Religionen und mit ihnen Glaubenspraxen am gesellschaftlichen Wandel zu einer Kultur der Digitalität teilhaben. Es wird auf vorangehende Studien aufgebaut, die zeigen, dass die Erwartung von Lehrpersonen, guten Unterricht mit digitalen Medien gestalten zu können, von positiven Vorerfahrungen mit diesen abhängt. Das Projekt greift hierfür exemplarisch die innerhalb von digitalen Kommunikationen verbreitete religiöse Urgeste des Segens und Segnens auf. In einem iterativen Prozess entstanden interaktive Exponate, sogenannte Blessing Machines. Sie wurden entlang psychologischer Bedürfnisse mit dem Ziel gestaltet, für Schüler:innen und ihre Lehrpersonen religionserschließende Erfahrungen mit digitalem Lernen zu ermöglichen. 200 Personen testeten die dreizehn Blessing Machines (Schulklasse, Konfirmandengruppen) in the wild. Religionslehrpersonen wurden hierbei von der „Logistik`` des Einsatzes digitaler Medien im Unterricht entlastet. Der außerschulische Lernort erfüllte die wichtige Funktion, Schüler:innen und Lehrpersonen gelingende Erfahrungen mit Digital Religion zu ermöglichen. Die Gestaltung der Blessing Machines hat sich als wirksam herausgestellt, besonders Aspekte von Autonomie, Stimulation, Verbundenheit, Gemeinschaft und Provokation wurden positiv hervorgehoben.
• aVeRsive tension: A new virtual reality paradigm to assess emotional arousal in adolescent and young adult patients with symptoms of borderline personality disorder. Mittermeier, Sabrina; Gregorova, Klara; Goettfert, Christopher; Merz, Christian; Weiß, Martin; Krauss, Jana; Franke, Sarah; Reiter, Andrea; Wienrich, Carolin; Buerger, Arne (2025). 25(2) 100583.

  Background High emotional arousal (EA) is a core feature of borderline personality disorder (BPD). While virtual reality (VR) has shown promise in treating emotion-based disorders, research on VR applications for BPD remains limited, especially in adolescence. This study aimed to validate a novel VR-based aVeRsive tension paradigm for assessing EA in adolescents and young adults with BPD symptoms. Methods In a multimodal study, we investigated the validity of aVeRsive tension: We surveyed 62 patients with BPD symptoms and 62 healthy controls (HC) aged 13–25 years who completed two VR sessions (stress/control condition). Each session included an adapted Trier Social Stress Test (TSST) followed by a cyberball paradigm. Subjective EA ratings and physiological measurements were taken during the sessions. Results The BPD group showed significantly higher EA levels compared to HC across both conditions. While both groups exhibited peak EA after TSST, HC demonstrated EA reduction during Cyberball in both conditions. The BPD group maintained elevated EA levels in the stress condition. Physiological data partially supported these findings, with the BPD group showing higher heart rates, particularly during Cyberball in the stress condition. Discussion The aVeRsive tension paradigm successfully discriminated between BPD and HC groups, capturing both subjective and physiological responses. The sustained EA in the BPD group during stress conditions aligns with characteristic emotion dysregulation patterns. While task-specific effects were observed, with TSST eliciting stronger responses than Cyberball, the paradigm effectively simulated real-life stressors in a controlled VR environment. Conclusion This study validates the aVeRsive tension protocol as a promising tool for assessing EA in adolescents and young adults with BPD symptoms. The VR-based approach offers advantages in experimental control and ecological validity, showing potential for both diagnostic assessment and therapeutic intervention in clinical settings.
• Resound: A Moment of Reflection in a Techno-Spiritual RtD Inquiry. Claisse, Caroline; Chatting, David; Wolf, Sara; Morris, Ben; Durrant, Abigail C in TEI ’25 (2025).

  We present 'Resound', a Research through Design inquiry into alternative techno-spiritual practices of a UK Buddhist community, informed by a first-person and participatory approach with the members. In this pictorial we portray a moment of reflection as we consolidate our design work towards deployment with the community. We introduce the Resound Sphere, a materialisation of our learning and speculations to date, designed as a research product to empirically explore alternatives for how tangible interaction could mediate religious/spiritual practices. We contribute with the framing of a design space, the presentation of our design approach and artefact response to this design space.
• Adjoint-based optimal control of jump-diffusion processes. Bartsch, Jan; Borzì, Alfio; Ciaramella, Gabriele; Reichle, Jan (2025).
• The 2016 CDC Opioid Guideline and Analgesic Prescribing Patterns in Older Adults With Cancer. Rodin, Rebecca; Li, Lihua; McKendrick, Karen; Harrison, Krista; Hunt, Lauren J.; Muench, Ulrike; Smith, Cardinale B.; Aldridge, Melissa D.; Morrison, R. Sean (2025). 8(5) e259043.
• Process Autonomization: Rethinking Business Process Management. Janiesch, Christian; Kowalkiewicz, Marek; Rosemann, Michael (2025).
• Making Alternatives Through Design for Mediated Spiritual Practice. Claisse, Caroline; Chatting, David; Wolf, Sara; Morris, Ben; Durrant, Abigail C in HttF ’24 (2024).

  The COVID-19 pandemic has intensified our dependence on screen-based devices, re-shaping how we connect with one another. Motivated by a yearning for alternative and post-pandemic religious and spiritual (R/S) practice, we pursue a Research-through-Design (RtD) project, Resound, exploring mediated technospiritual connections with a UK-based Buddhist community. This pictorial depicts the complexity of (i) designing with spiritual-corporeal selves engaged in community-centred and ritualistic practices; (ii) and tangible artefacts and sonic environments being made, configured and practiced with. We reflect on this ongoing material engagement as making tangible alternatives through techno-spiritual practice.
• Partizipative und Sozialverantwortliche Technikentwicklung. Maas, Franzisca; Volkman, Torben; Jarke, Julian; Berger, Arne; Bischof, Andreas; Buchmüller, Sandra; Draude, Claude; Gaertner, Wanda; Horn, Viktoria; Maaß, Susanne; Marsden, Nicola; Mucha, Henrik; Struzek, David; Stepczynski, Jan; Wolf, Sara (2024).
• (Un)designing AI for Mental and Spiritual Wellbeing. Smith, C. Estelle; Bezabih, Alemitu; Freed, Diana; Halperin, Brett A.; Wolf, Sara; Claisse, Caroline; Li, Jingjin; Hoefer, Michael; Rifat, Mohammad Rashidujjaman in CSCW Companion ’24 (2024). 117–120.

  With rapid advances in Artificial Intelligence (AI) impacting human health and wellbeing, scholarly discourse should focus equally on the prospective opportunities and harms of Human-AI Interaction (HAI) in Computer-Supported Collaborative Work and Social Computing (CSCW). This panel invites critical interdisciplinary discussion around the (un)designing of AI by asking: how, when, where, and why should AI (not) be involved in sociotechnical systems for mental and spiritual health and wellbeing? Motivated by functional, technical, and ethical concerns, the panel aims to ensure that: (1) progress in HAI for mental and spiritual health is informed by expertise from the respective clinical disciplines; (2) ethical and responsible design principles lie at the core of research motivations and methodologies; and (3) AI hype can be tempered by caution given its impacts on marginalized and stigmatized groups. A panel of respected experts in mental health, spiritual care, and AI will discuss CSCW topics regarding HAI in contexts of clinical practice (e.g., electronic health records, patient portals, decision-making and referral systems, technology-supported interactions during bedside care or clinical appointments) as well as social contexts beyond the clinic (e.g., social apps, online health communities and social media, and computer-mediated communication in spiritual/religious groups).
• Topological Heusler magnets-driven high-performance transverse Nernst thermoelectric generators. Chen, Mengzhao; Wang, Jialu; Liu, Kai; Fan, Wusheng; Sun, Yan; Felser, Claudia; Zhu, Tiejun; Fu, Chenguang (2024). 14(21) 2400411-.

  Abstract Topological magnets (TMs) with the coupled topology of electronic band structures and spin configuration have exhibited exotic transport properties that are overwhelmingly appealing for transverse thermoelectric applications. Despite the continuous discovery of TMs in recent years, the development of Nernst generators has much lagged. Here, high-performance Nernst generators are developed utilizing polycrystalline topological Heusler bulk magnets. Benefiting from the robustness of topological effect to grain boundary scattering, polycrystalline Co2MnGa is found to exhibit a large Nernst thermopower of ≈6.5 µV K?1 at 300 K, which is comparable to the previously reported record value in its single crystal. The developed Nernst generators thereby exhibit excellent performance with an output voltage of 5.4 mV and power of 14.3 µW, significantly higher than that of Nernst thermopiles assembled using conventional ferromagnets. These results pave the way to advancing TMs with intrinsically large Berry curvature for transverse thermoelectric applications.
• Navigating Intersections of Religion/Spirituality and Human-Computer Interaction. Markum, Robert B.; Maas, Franzisca; Wolf, Sara; Halperin, Brett A.; Claisse, Caroline; Buie, Elizabeth in NordiCHI ’24 Adjunct (2024).

  Religion and spirituality (R/S) are an important part of many people’s lives, and while HCI is increasingly engaged in research and design in specific R/S contexts, there are many cases where researchers or designers encounter R/S outside of such contexts. In this workshop, we seek to bring together HCI researchers and designers across all research areas and with varying levels of experience with R/S to discuss encounters with R/S in their work, either intentional or not, and to develop principles and strategies to guide HCI research and design that intersects with R/S. Through this workshop, we also seek to further establish a network of scholars who can provide each other support in navigating R/S-related challenges and opportunities in their work and can participate in publication-oriented collaborations that consider the intersection of R/S and HCI.
• Sensing Heritage: Exploring Creative Approaches for Capturing, Experiencing and Safeguarding the Sensorial Aspects of Cultural Heritage. Ppali, Sophia; Pasia, Marina; Wolf, Sara; Han, Jihae; Muntean, Reese; Yoo, Minyoung; Rodil, Kasper; Berger, Arne; Papallas, Andreas; Ciolfi, Luigina; Stevens, John; Covaci, Alexandra in DIS ’24 Companion (2024). 445–448.

  Whilst there is increasing work investigating the role of digital documentation, interpretation, and augmentation of cultural heritage, such interventions have largely focused on visual and sometimes auditory modalities, neglecting the full spectrum of human senses. With this workshop we seek to bring together an interdisciplinary group of researchers, designers, practitioners and community members to explore creative approaches for documenting and experiencing cultural heritage’s rich sensory dimensions extending beyond visual-based approaches to encompass sound, smell, taste, and touch. The workshop directly aligns with the conference’s exploration of "Why Design?" by utilising design as a powerful, empathetic, and participatory tool for safeguarding cultural heritage. Our goal is to extend our understanding of concepts, methods and technologies for capturing and experiencing sensory heritage, advocating for a holistic approach that celebrates and communicates the profound sensory diversity of human cultures, inspiring a shift in how we document, interpret and share cultural heritage.
• Still Not a Lot of Research? Re-Examining HCI Research on Religion and Spirituality. Wolf, Sara; Friedrich, Paula; Hurtienne, Jörn in CHI EA ’24 (2024).

  A decade after Buie and Blythe’s review "Spirituality: There’s an App for That! (But Not a Lot of Research)", this sequel assesses the evolving landscape of Human-Computer Interaction (HCI) research on religion and spirituality. While the enduring importance of religion and spirituality for humanity and its influence on technology use remains, the last decade has seen transformative shifts catalysed by technological advances and the global impact of the COVID-19 pandemic. This paper explores whether and how HCI research on religion and spirituality has also changed. Providing a snapshot of the current research, we document and reflect on changes in the lines of research with a shift towards community, an increased consideration of religion and spirituality in related areas such as health, education, and society, and the broadening of challenges for HCI research on religion and spirituality.
• Design and Implementation of a Decision Integration System for Monitoring and Optimizing Heating Systems: Results and Lessons Learned. Djebko, Kirill; Weidner, Daniel; Waleska, Marcel; Krey, Timo; Kamble, Bhaskar; Rausch, Sven; Seipel, Dietmar; Puppe, Frank (2024). 17(24) 6290.
• Exploring Virtual Reality for Religious Education in Real-World Settings. Wolf, Sara; Nord, Ilona; Hurtienne, Jörn (2024). 953–954.
• Mediating the Sacred: Configuring a Design Space for Religious and Spiritual Tangible Interactive Artifacts. Markum, Robert B.; Wolf, Sara; Claisse, Caroline; Hoefer, Michael in TEI ’24 (2024).

  Tangible artifacts and embodied experiences are central to religious and spiritual (R/S) practices, and many HCI researchers and interaction designers highlight the importance of materiality and physicality in design. In this review paper, we bring these perspectives together and examine 44 examples of R/S tangible interactive artifacts (TIAs) from academia, art, industry, and R/S communities to understand their specifics and guide future HCI research and design. We analyze these artifacts and map out a design space for R/S TIAs by matching identified characteristics of R/S TIAs with a framework from the study of material religion. The descriptive and generative R/S TIA Design Space covers insights into bodies, things, places, practices, and backgrounds. This paper offers a novel contribution to HCI research on the value and importance of tangibility and embodiment in technology-mediated practices in R/S contexts and serves as a source for future R/S TIA creation and research.
• Integrated Simulation and Calibration Framework for Heating System Optimization. Djebko, Kirill; Weidner, Daniel; Waleska, Marcel; Krey, Timo; Rausch, Sven; Seipel, Dietmar; Puppe, Frank (2024). 24(3) 886.
• Pour une écologie politique: au-delà du capitalocène Aglietta, Michel; Espagne, Étienne (2024). Odile Jacob, Paris.

  L'expansion du capitalisme est fondée sur l'exploitation de la nature comme un don gratuit. Le projet du Capitalocène est d'éclairer les soubassements physiques et naturels du capitalisme, de montrer ses limites institutionnelles et spatiales. Ce livre commence par montrer comment les procédés d'accumulation du capital ont bouleversé, au cours de l'histoire, les équilibres écologiques et les moyens de subsistance des sociétés. Analysant les régimes historiques de viabilité qui se sont succédé, il met au jour le rôle central de la monnaie et de la finance dans l'émergence, la perpétuation dans l'espace, puis la crise, des hiérarchies écologiques. Le livre examine ensuite ce que pourrait être une écologie politique au-delà du Capitalocène. Quels en seraient les principes de régulation ? Comment valoriser le climat et la biodiversité ? Comment restaurer les biens communs face à la logique d'appropriation gratuite de la nature ? La question de la valeur est ici décisive. Appelant à une transformation de la gouvernance des entreprises, à un retour assumé aux politiques industrielles pour les secteurs décarbonés et à la réforme d'une architecture financière internationale, Michel Aglietta et Étienne Espagne plaident pour une planification stratégique, seule à même de fonder une écologie politique compatible avec les limites planétaires. Un livre fondamental pour comprendre l'articulation du capitalisme et de l'écologie. Michel Aglietta est professeur émérite à l'université Paris-Nanterre et conseiller scientifique au CEPII. Il a été membre de l'Institut universitaire de France et membre du Haut Conseil des finances publiques.Étienne Espagne est économiste du climat à la Banque mondiale et chercheur associé au Centre d'études et de recherches sur le développement international (CERDI). Il enseigne régulièrement à l'université Paris-I, à l'EHESS et à l'École polytechnique. Il a précédemment travaillé à l'Agence française de développement, au CEPII, à France Stratégie et au CIRED.
• Benchmarking of Secure Group Communication schemes with Focus on IoT. Prantl, Thomas; Bauer, André; Engel, Simon; Horn, Lukas; Krupitzer, Christian; Iffl"ander, Lukas; Kounev, Samuel (2024). 2(1)
• Marino Becichemo i dubrovački kodeksi Heroida. Jovanović, Neven (2024). 33(33) 13–39.
• Security Analysis of a Decentralized, Revocable and Verifiable Attribute-Based Encryption Scheme. Prantl, Thomas; Lauer, Marco; Horn, Lukas; Engel, Simon; Dingel, David; Kounev, Samuel; Bauer, André; Krupitzer, Christian; Kounev, Samuel in ARES 2024 (2024). 1–11.
• Reconstructing the system coefficients for coupled harmonic oscillators. Bartsch, Jan; Barakat, Ahmed A.; Buchwald, Simon; Ciaramella, Gabriele; Volkwein, Stefan; Weig, Eva M. (2024).
• On the stabilization of a kinetic model by feedback-like control fields in a Monte Carlo framework. Bartsch, Jan; Borzì, Alfio (2024).
• Adjoint-based calibration of nonlinear stochastic differential equations. Bartsch, Jan; Denk, Robert; Volkwein, Stefan (2024). 90(3) Paper No. 50, 54.
• Reconstruction of unknown nonlinear operators in semilinear elliptic models using optimal inputs. Bartsch, Jan; Buchwald, Simon; Ciaramella, Gabriele; Volkwein, Stefan (2024).
• Controlling a Vlasov-Poisson Plasma by a Particle-in-Cell Method Based on a Monte Carlo Framework. Bartsch, Jan; Knopf, Patrik; Scheurer, Stefania; Weber, Jörg (2024). 62(4) 1977–2011.
• FUZZY PREPROCESSING OF VIOLA-JONES ALGORITHM FOR FACE RECOGNITION IN THERMAL IMAGES. Martínez, Edwyn E. Martínez (ed.) (2023). (Vol. 13) 1–8.

  This paper proposes to improve the Viola-Jones algorithm to identify facial features in thermal images using a fuzzy linguistic modifier. The purpose is to improve the image quality in the infrared plane and to facilitate the recognition stage, feature selection and emotion classification. The results obtained show that adding a preprocessing stage improves the capability of the Viola-Jones algorithm in identifying facial features in thermal images.
• Something is Missing: On the Value of Displaying Missing and Nuanced Data. Friedenberger, Tamara; Hurtienne, Jörn (2023).
• Designing XR Games that Bring us Closer: A Workshop to Combine Game Design and Psychological Determinants of Closeness. Licht, Eva; Baur, Cordula; Maas, Franzisca; Friedenberger, Tamara; Hemmert, Fabian; Hurtienne, Jörn in CEUR Workshop Proceedings, S. Kriglstein, P. Wintersberger (eds.) (2023). (Vol. 3712)
• Virtual Tourism, Real Experience: A Motive-Oriented Approach to Virtual Tourism. Wolf, Sara; Weber, Michael; Hurtienne, Jörn in CHI EA ’23 (2023).

  Virtual tourism products promise to combine the best of two worlds: Staying in the safety of one’s home while having engaging tourism experiences. Previous tourism research has emphasised that tourism experiences involve more than just seeing other places. They address cultural motives such as novelty and education and socio-psychological motives like relaxation, escape from a mundane environment or facilitation of social interaction. We suggest applying the motive-oriented perspective in HCI research on virtual tourism and report on a corresponding analysis of 21 virtual tourism products. Our findings show that current virtual tourism products neglect the breadth of tourist motives. They mainly focus on cultural motives while rarely addressing socio-psychological motives, especially kinship relationships and prestige. Our findings demonstrate the usefulness of the motive-oriented perspective for HCI and inspired conceptual ideas for addressing motives in virtual tourism products that may be useful for future research and design in this area.
• Designing for Uncontrollability: Drawing Inspiration from the Blessing Companion. Wolf, Sara; Luthe, Simon; Baumeister, Lennart; Moerike, Frauke; Janakiraman, Vyjayanthi; Hurtienne, Jörn in CHI ’23 (2023).

  This paper presents an inspirational concept for companion technology design, uncontrollability, and a corresponding artefact, the Blessing Companion. Both originated from a research through design project exploring companion technologies for blessing rituals. We established an exchange with Protestant theologians, explored believers’ experiences of blessings, co-speculated on potential technologies, and refined the resulting ideas through ideation, prototyping, and testing. Inspired by believers’ descriptions of blessing experiences as not plannable, predictable, controllable, or enforceable, we adopted the concept of uncontrollability, explored how it might be implemented in companion technologies, and designed the Blessing Companion. The Blessing Companion embodies uncontrollability through its ambiguous appearance and (partly) uncontrollable behaviour. It thus stands in contrast to the prevailing on-demand and user-driven interaction paradigms. We discuss how uncontrollability can be reflected in content, form, and interaction, highlight respective possibilities for companion technologies, and reflect on the Blessing Companion as an example of designing for religious rituals.
• Designing Tangible Interactive Artifacts for Religious and Spiritual Purposes. Markum, Robert B.; Wolf, Sara; Hoefer, Michael; Maas, Franzisca in DIS ’23 Companion (2023). 117–120.

  From candles to prayer beads to icons and more, tangible artifacts have long played a central role in religious and spiritual life. However, despite growing interest in HCI on design within religious and spiritual contexts, the intentional design of tangible interactive artifacts for religious or spiritual purposes is still relatively uncommon. This workshop aims at advancing our understanding of tangible interactive artifact design in religious and spiritual contexts and how religious and spiritual purposes may offer alternative approaches to design. We invite those interested from all professional and religious/spiritual backgrounds to imagine and design tangible interactive artifacts for religious or spiritual purposes such as beliefs, practices, or rituals. The workshop will include the demonstration of (imagined) artifacts, reflection on designing for religious/spiritual purposes, and hands-on design sessions.
• The God-I-Box: Iteratively Provotyping Technology-Mediated Worship Services. Wolf, Sara; Steinmüller, Benedikt; Mörike, Frauke; Luthe, Simon; Hurtienne, Jörn in DIS ’23 (2023). 1710–1723.

  The COVID-19 pandemic accelerated the development of alternative formats for religious rituals, such as Protestant online worship services. However, current design approaches focus on problem-solving, and the resulting online solutions merely imitate the offline status quo. To overcome these limitations, we suggest adopting a provotype approach that allows for a more holistic, open-ended dialogue with those affected. We iteratively developed a first provotype in response to tensions found in observation-based field research, aiming to test whether and how it can trigger productive impulses for exploring future technology-mediated worship services based on existing experiences and perspectives. The resulting God-I-Box exaggerates individuality and allows congregants to act almost like liturgists. An analysis of congregants’ and pastors’ (online) first encounters with the God-I-Box revealed three reaction modes: spontaneous emotions, reflective coping, and exploratory imagination. We conclude with reflections and recommendations for provocative research and design in this context and beyond.
• Learning attitude control. Djebko, Kirill; Puppe, Frank; Montenegro, Sergio; Baumann, Tom; Faisal, Muhammad (2023).
• It’s the data, stupid! Constructive and analytical quality-assurance for AI-based space systems. Gerlich, Ralf; Gerlich, Rainer; Montenegro, Sergio; Puppe, Frank; Djebko, Kirill; Plasberg, Carsten; Bädorf, Michael (2023).
• SustainTourism – Experiencing Tourism From Home. Bott, Myriam; Wolf, Sara (2023).
• Partizipative und Sozialverantwortliche Technikentwicklung. Berger, Arne; Mucha, Henrik; Horn, Viktoria; Bischof, Andreas; Volkmann, Torben; Draude, Claude; Becker, Alexa; Haupt, Benedikt; Jarke, Juliane; Maas, Franzisca; Wolf, Sara; Dhungel, Anna-Katharina; Buchmüller, Sandra; Marsden, Nicola 0 (2023).
• Towards a Cryptography Encyclopedia: A Survey on Attribute-Based Encryption. Prantl, Thomas; Zeck, Timo; Horn, Lukas; Iffländer, Lukas; Bauer, André; Dmitrienko, Alexandra; Krupitzer, Christian; Kounev, Samuel (2023).
• De Bello Homomorphico: Investigation of the extensibility of the OpenFHE library with basic mathematical functions by means of common approaches using the example of the CKKS cryptosystem. Prantl, Thomas; Horn, Lukas; Engel, Simon; Iffländer, Lukas; Beierlieb, Lukas; Krupitzer, Christian; Bauer, André; Sakarvadia, Mansi; Foster, Ian; Kounev, Samuel (2023).
• Performance Impact Analysis of Homomorphic Encryption: A Case Study Using Linear Regression as an Example. Prantl, Thomas; Engel, Simon; Horn, Lukas; Kaiser, Dennis; Iffländer, Lukas; Bauer, André; Krupitzer, Christian; Kounev, Samuel W. Meng, Z. Yan, V. Piuri (eds.) (2023). 284–298.

  In recent years, the trend has increasingly been to store and process data in the cloud. However, this is based on the premise that cloud providers treat the data in a trustworthy manner. One way of using the data in the cloud without the provider having access to it is homomorphic encryption. However, since this encryption has only recently become practicable, analysis of its for practical applications is still in its infancy. Therefore, we investigate the performance of homomorphic encryption using a real-world application, namely linear regression. Our main finding is that although the homomorphic computation of linear regression is in the range of minutes and thus slower than in the non-homomorphic case, linear regression can be computed homomorphic and is therefore suitable for use cases where data security is the top priority.
• ‘I Did Digital Tidying up for a More Adult Stage of Life’: Ritualistic Technology Appropriations During Life Transitions. Wolf, Sara; Mörike, Frauke; Löffler, Diana; Hurtienne, Jörn (2022). 34(5) 117–128.

  Life transitions, such as the transition from childhood to adulthood, are often accompanied by meaning-making actions such as rituals. Rituals increasingly involve the use of interactive technology. While previous research has focused on specific contexts or technologies, a bird’s eye view of the many appropriation styles during life transitions is missing. To identify the range of technology’s appropriations, we analysed stories from 84 participants and compared these across different life transitions and technologies. We identified three roles interactive technology can play during life transitions: the role of (i) a facilitator easing the accomplishment of tasks within life transitions, (ii) an enabler creating opportunities for new transition rituals and (iii) a social actor that itself is the trigger or the content of transition rituals. We propose the three roles as a classification scheme to structure existing and future research and reflect on the design challenges and evaluation approaches.
• Usporedba opkoračenja u Juditi i Davidijadi. Jovanović, Neven (2022). 31(31) 37–49.
• Unavailability: Food for Thought from Protestant Theology. Wolf, Sara; Luthe, Simon; Nord, Ilona; Hurtienne, Jörn (2022).
• Co-Imagining Participatory Design in Religious and Spiritual Contexts. Markum, Robert B.; Wolf, Sara; Luthe, Simon in NordiCHI ’22 Adjunct (2022).

  People with religious and/or spiritual interests have long been digitally connected and have engaged in joint prayer, worship, or meditation. However, the COVID pandemic has accelerated this trend as more religious and/or spiritual activities were technologically mediated. Many of these formats had to be implemented quickly, often with little participation from stakeholders. In this workshop, we aim to bring together scholars and practitioners from different backgrounds, such as religious studies, theology, HCI, and participatory design, to start a conversation about what collaborative technological design and research with religious and/or spiritual communities could look like in the future and what needs to be done to get to such futures. The outcomes of this workshop will be the formation of a transdisciplinary research and design community, the establishment of guiding principles and best practices that can inform research and design methodologies, and the dissemination of this knowledge in collaborative post-workshop publications.
• UNeedS: Development of Scales to Measure the Satisfaction and Frustration of 13 Fundamental Needs. Wolf, Sara; Maas, Franzisca; Künzl, Pauline; Hohm, Anna; Hurtienne, Jörn in MuC ’22 (2022). 539–544.

  Good user experience can be described as the result of satisfying fundamental human needs through interaction with technology. Therefore, HCI researchers and practitioners strive to promote need satisfaction and avoid need frustration through their technology and interaction designs. However, HCI lacks appropriate measurement instruments to examine and evaluate experiences with technology in terms of their satisfaction (or frustration) of needs. Instead, researchers and practitioners frequently use measurement instruments developed in (consumer) psychology that are not tailored to the needs of HCI. Here we report on the development of the User Needs Scales (UNeedS), a set of scales designed to measure the satisfaction and frustration of 13 fundamental needs identified for HCI, and report on our first experiences applying it. Preliminary data indicate good item qualities and internal consistencies, but further research must substantiate these claims. All scales and the full UNeedS are available in the supplemental materials.
• Spirituality at the Breakfast Table: Experiences of Christian Online Worship Services. Wolf, Sara; Moerike, Frauke; Luthe, Simon; Nord, Ilona; Hurtienne, Jörn in CHI EA ’22 (2022).

  Since the COVID-19 pandemics, we have witnessed an increase in online worship services. Nevertheless, HCI has little insight into how technological mediation influences religious experiences and how technology should be designed for use in religious contexts. Therefore, we see a unique opportunity to understand better real-world experiences of technology use in religious rituals and, more specifically, in online worship services. Inspired by contextual design, We virtually observed and interviewed eight persons during and after participation in online worship services. We identified a field of tension between faith, everyday life, individuality, and community. The data suggests that current online worship service systems do not account for believers’ needs for community, faith, or extraordinariness. We discuss opportunities for future research and design, and aim to contribute to the understanding of online worship service experiences and the design of technology-mediated religious experiences.
• Collaborative Speculations on Future Themes for Participatory Design in Germany. Mucha, Henrik; de Barros, Ana Correia; Benjamin, Jesse Josua; Benzmüller, Christoph; Bischof, Andreas; Buchmüller, Sandra; de Carvalho, Alexandra; Dhungel, Anna-Katharina; Draude, Claude; Fleck, Marc-Julian; Jarke, Juliane; Klein, Stefanie; Kortekaas, Caroline; Kurze, Albrecht; Linke, Diane; Maas, Franzisca; Marsden, Nicola; Melo, Ricardo; Michel, Susanne; Müller-Birn, Claudia; Pröbster, Monika; Rießenberger, Katja Antonia; Schäfer, Mirko Tobias; Sörries, Peter; Stilke, Julia; Volkmann, Torben; Weibert, Anne; Weinhold, Wilhelm; Wolf, Sara; Zorn, Isabel; Heidt, Michael; Berger, Arne (2022). 21(2) 283–298.
• Vida en el amor Cardenal, Ernesto (2021). Editorial San Pablo, Madrid.

  Sacerdote católico, poeta y escultor comprometido políticamente con los conflictos sociales de su país, Nicaragua, Ernesto Cardenal experimentó en 1956 una conversión espiritual que cambió su vida para siempre. Tras entrar en contacto con Thomas Merton y escribir uno de sus poemarios fundamentales, fundó la comunidad contemplativa de Solentiname, ubicada en el archipiélago del mismo nombre e inspirada en el proyecto evangelizador que le propone Merton durante su estancia en la Trapa. Esta obra, Vida en el amor, es considerada la cima de su obra mística. El mensaje que contiene se vuelve, tras su muerte y las circunstancias históricas que atraviesa la humanidad, especialmente necesario.
• Und dann kam Corona: Ein Technikentwicklungsprojekt zwischen Partizipation und Wirklichkeit. Maas, Franzisca; Wolf, Sara (2021).
• Partizipative & Sozialverantwortliche Technikentwicklung. Mucha, Henrik; Maas, Franzisca; Draude, Claude; Stilke, Julia; Jarke, Juliane; Bischof, Andreas; Marsden, Nicola; Berger, Arne; Wolf, Sara; Buchmüller, Sandra; Maaß, Susanne (2021).
• Optimal control of the Keilson-Storer master equation in a Monte Carlo framework. Bartsch, Jan; Nastasi, Giovanni; Borzì, Alfio (2021). 50(5) 454–482.
• A numerical investigation of Brockett’s ensemble optimal control problems. Bartsch, Jan; Borzì, Alfio; Fanelli, Francesco; Roy, Souvik (2021). 149(1) 1–42.
• Thinking Better. The art of the shortcut in math and life Du Sautoy, Marcus (2021). 4th Estate, London.
• Vladislav Gučetić, De casibus domus atque familię suę carmen allegoricum, edidit Darko Novaković [Biblioteka Marulianum, 10; Niz Kritička izdanja, 2]. Split: Književni krug, 2018. Jovanović, Neven (2020). (58) 354–357.
• Vladislav Gučetić, De casibus domus atque familię suę carmen allegoricum, ed. Darko Novaković [Biblioteka Marulianum, vol. 10; Kritička izdanja, vol. 2]. Split: Književni krug, 2018. Jovanović, Neven (2020). (24) 181–183.
• Rukopisi, kolacija svjedoka predaje i paratekstovi nadgrobnog govora Nikole Modruškog za kardinala Pietra Riarija (1474). Jovanović, Neven (2020). 1–16.
• Data visualization. Charts, maps, and interactive graphics Grant, Robert (2019). CRC Press, Boca Raton, FL:.
• Mogući pristup rimskoj književnosti. Jovanović, Neven (2019). 87–102.
• A theoretical investigation of Brockett’s ensemble optimal control problems. Bartsch, Jan; Borzì, Alfio; Fanelli, Francesco; Roy, Souvik (2019). 58(5) Paper No. 162, 34.
• ... so dass sich die Landpfleger sehr verwundern: Die politischen Texte Hüsch, Hanns Dieter in Hanns Dieter Hüsch: Das literarische Werk, (H. Lotz, ed.) (2015). Edition diá, Berlin.

  »Hüschs Zeitkritik war stets Ideologiekritik des skeptischen Individuums, des kleinen Mannes auf der Straße, der sich so seine Gedanken macht. Obwohl er während der Revoltejahre keineswegs abseits stand und sich wie viele damals wünschte ›Komm heißer Herbst und mache / Die Bäume alle rot‹, wurde ihm ein ›bourgeoiser Verniedlichungstrend‹ vorgeworfen ... Beim Folklore-Festival auf der Burg Waldeck 1968 buhte man ihn gar unter wüsten Beschimpfungen – ›Kitschgemüt mit Goldbrokat‹ – von der Bühne. Die Ironie der Geschichte will, dass er heute zu den Letzten – und zugleich Besten – der Branche gehört, die überhaupt noch in den Kategorien von Politik und Gesellschaft, Kritik und Solidarität denken, denken können - ja, die überhaupt noch aus eigenem Antrieb Ideen entwickeln und nicht von angestellten Gagschreibern getextete Texte auswendig vortragen müssen, bis die Quotenguillotine fällt.« (Quelle: Der Spiegel vom 1. Mai 2000)
• In Certain Circles Harrower, Elizabeth (2015). Text, Melbourne.
• Kako su Mažuranića čitali u Bosni i Hercegovini. Meić, Perina (2014). 108–136.
• Europe: sortir de la crise et inventer l’avenir Aglietta, Michel (2014). Michalon, Paris.

  L'Europe doit affronter les defits du XXIe siecle en retrouvant son autonomie ideologique dans l'esprit communautaire des origines. Ce livre montre le besoin d'une vue de long terme tournee vers deux finalites: reconstruire un contrat social fonde sur un partenariat entrepreneurial et investir resolument dans la transition ecologique.
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• Yugoslavia as history : twice there was a country Lampe, John R. (1996). Cambridge Univ. Press, Cambridge.
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• Thermal physics Kittel, Charles; Kroemer, Herbert (1980). (Second ) W.H. Freeman and Co., New York.
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• Introduction to solid state physics Kittel, Charles (1953). (First ) Chapman and Hall, London.
• Graf Julius Andrassy, sein Leben und seine Zeit : Nach ungedruckten Quellen Wertheimer, Eduard (1910). (Vol. 1) Deutsche Verlags-Anstalt, Stuttgart.