Technische Universität Berlin

Sea Level Rise Damages on Ecosystem Quality─A Life Cycle Impact Pathway

Abstract Climate change causes species extinction not only by the direct increase in surface temperatures but also by indirect mechanisms, like sea level rise (SLR). These indirect mechanisms are rarely integrated into environmental impact assessment methods, such as life cycle a...

Droplets sitting on thin elastic sheets: a study with the boundary element method

Abstract Elasto-capillarity of a droplet wetting an elastic sheet provides an interesting system, both for fundamental and applied research. The droplet sinks into the sheet and assumes the shape of a lens. To determine the equilibrium shape in simulations, we formulate a boundar...

Ctrl-F-Resist. Practices, Challenges, and Technical Needs of Civil Society Organizations Monitoring the Far-Right Online

As far-right actors increasingly exploit online platforms to disseminate ideology and mobilize supporters, civil society organizations (CSOs) play a vital yet under-recognized role in monitoring antidemocratic dynamics online. Unlike fact-checkers or content moderators, CSOs enga...

Waveguide-Integrated Photonic Platform for On-Chip Optical Quantum-Dot Excitation via Electrically Pumped WGM Microlasers

Abstract We report the fabrication and characterization of an integrated quantum photonic device consisting of an electrically driven whispering-gallery-mode micropillar laser evanescently coupled to a ridge waveguide, both incorporating InGaAs quantum dots (QDs). The lasing char...

Microstructure-resolved modeling and sensitivity analysis of zinc–air batteries

Zinc–air batteries offer high theoretical energy density and material sustainability but are constrained by microstructure-driven nonuniform zinc-anode reactions, transport limitations, and passivation. A multiscale modeling framework, calibrated and evaluated against commercial...

On the maximum likelihood degree of Gaussian graphical models

Abstract In this paper we revisit the likelihood geometry of Gaussian graphical models. We give a detailed proof that the ML‐degree behaves monotonically on induced subgraphs. Furthermore, we complete a missing argument that the ML‐degree of the cycle is larger than 1 for any , t...

Violoncello String Vibrations as an Example of Continuum Dynamics—Limits of Minimal Model Considerations

ABSTRACT Vibrations in string instruments and especially the excitation of their strings by bowing or plucking have been the subject of considerations and research for decades in textbooks and research papers. The current presentation collects some instructive measurement results...

Borosulfates Hosting Se 4 2+ Ions—Crystal Structures, Chemical Bonding, Optical Spectroscopy, and Magnetism

ABSTRACT Despite consistent growth in the number of compounds known to host homo‐ and hetero polycations of group 16 elements, only two, Se 4 [HS 2 O 7 ] 2 and Se 4 [S 4 O 13 ], provided an exclusively oxidic coordination environment, the former being the first structural charact...

Spontaneous visual perspective-taking in human–robot interaction as a methodological artifact of spatial stimulus arrangement

Abstract While prior research has demonstrated spontaneous visual perspective-taking (VPT) towards robots using static images or videos of existing robots, little is known about whether VPT occurs with robotic avatars or in immersive environments like virtual reality (VR). The pu...

On $$\vec {p}(\cdot )$$-Laplacian Equations with Generalized Anisotropic Neumann Boundary Condition

Abstract In this paper, we investigate the existence and multiplicity of solutions for an anisotropic variable exponent problem of the form $$\begin{aligned} -\sum _{i=1}^{N}\frac{\partial }{\partial x_{i}} \left( \left| \frac{\partial u}{\partial x_{i}}\right| ^{p_{i}(x)-2} \fra...

Fate and Transport of Polar Organic Micropollutants in Soil–Plant Systems Quantified by Mass Balance using Laboratory-Scale Lysimeters

Abstract Irrigation with reclaimed water can mitigate water scarcity but may also introduce polar organic micropollutants (OMPs) into agricultural systems. As these compounds are frequently detected in treated wastewater and aquatic environments, this study investigated their env...

Explainable AI in Corporate Finance: A SHAP-Based Approach to Enhancing Transparency

The increasing adoption of machine learning models in corporate valuation has substantially improved predictive accuracy but at the cost of interpretability, a critical limitation in regulated financial environments. This study investigates whether SHAP (Shapley Additive Explanat...

Adsorption and Mass Transport of Methane and Hydrogen in Nanoporous Carbon Membranes - Binary Mass Transport Experiments and Modeling

Abstract This study investigates binary mass transport of methane (CH4) and hydrogen (H2) through carbon-based nanoporous membranes at elevated temperatures. Building upon previous single-component adsorption and permeation measurements, we present new binary permeation experimen...

Optimal execution and speculation with trade signals

Abstract We propose a price impact model where changes in prices are purely driven by the order flow in the market. The stochastic price impact of market orders and the arrival rates of limit and market orders are functions of the market liquidity process which reflects the balan...

Motivations for smart cities differ between Africa, Europe, and Asia

Smart cities are understood in literature and among municipal actors as a way forward to better organize and manage cities. However, the underlying motivations behind smart city development diverge substantially across regions, and their implications for governance capacity and u...

Navigating context and complexity: pedagogical insights from environmental assessment teaching

Teaching Environmental Assessment (EA) in higher education is both challenging and essential, given its applied, interdisciplinary nature and close connection to evolving practice. While previous studies highlight recurring challenges in EA teaching, such as dispersed course stru...

Signals of Communicative Intent Enhance the Impact of Emotional Messages from Human Speakers, While Effects for Robots are Attenuated

Abstract The present work investigated humans’ responses to robots’ verbal emotional expressions. To this end, the interplay of agent characteristics and signals of communicative intent on emotional word processing was examined. In two behavioral studies (N1 = 36, N2 = 72), parti...

High-performance computing in the hydrosciences

This paper provides an overview of High Performance Computing (HPC) in the hydrosciences. It begins with the development of HPC architectures and performance as well as with the expansion of application fields over the last decades. Subsequently, four HPC application cases are pr...

A Frank-Wolfe-based primal heuristic for quadratic mixed-integer optimization

Abstract We propose a primal heuristic for quadratic mixed-integer problems. Our method extends the Boscia framework – originally a mixed-integer convex solver leveraging a Frank-Wolfe-based branch-and-bound approach – to address nonconvex quadratic objective functions and constr...

Space politics in citizens’ assemblies: how chairs, microphones, and badges arrange participation in the German parliament

Why does silence settle over a room once chairs face a stage? Which knowledge gets amplified through a microphone? What shifts when a badge marks a role? Drawing on ethnographic research within the first German parliamentary citizens' assembly, convened by the Bundestag in Berlin...