Karlsruhe Institute of Technology

Photo‐Degradable Polyester Networks and Multi‐Photon Printed Objects Based on Cyclic Ketene Acetals

ABSTRACT Radical ring‐opening polymerization (RROP) of cyclic ketene acetals (CKAs) constitutes a powerful avenue to biodegradable polyesters via radical polymerization. CKA‐based degradable polymers have been established mainly as linear polymers, while networks from CKA‐based R...

Exceptional points, lasing, and coherent perfect absorption in Floquet scattering systems

Abstract Periodically time-varying media, known as photonic time crystals (PTCs), provide a promising platform for observing unconventional wave phenomena. We analyze the scattering of electromagnetic waves from spatially finite PTCs using the multispectral Floquet scattering mat...

Assessing running stability: a systematic review of methods

Abstract Background Running stability is increasingly investigated in biomechanics and motor control research. However, the term is operationalized using diverse methods that may reflect different theoretical constructs, which complicates cross-study comparison and interpretation...

Combining Small Aperture Approach and Toric Correction for Irregular Astigmatism Management

Purpose: Irregular astigmatism poses a challenge in cataract surgery due to its complex geometry and associated higher-order aberrations (HOAs), which limit the efficacy of conventional toric intraocular lenses (IOLs). IOLs featuring a small-aperture have shown promise in managin...

Fe24Ni15Cr3Al-Based AFA Steels in Oxygen-Controlled Liquid Pb at 500 °C, 600 °C, and 700 °C

Heavy liquid metals such as liquid lead (Pb) are attractive heat transfer media for advanced energy applications, despite their corrosive nature. In the search for heat-resistant austenitic materials that are corrosion resistant to liquid Pb at high temperature, three new Fe24Ni1...

Do emotions affect political trust judgments?

Abstract Our study explores the nature of political trust ratings in surveys. We provide novel empirical evidence that, in addition to informed and rational reasoning, emotional states play a role in trust evaluations. Leveraging a U.S. sample, we employ a novel smartphone survey...

Effects of an actuated ankle exoskeleton on walking stability in healthy adults: a controlled laboratory study

Abstract Background Ankle exoskeletons are widely used to reduce the metabolic cost of walking, yet their effects on walking stability during unperturbed gait remain insufficiently understood. Walking stability can be characterized using complementary measures that capture stride...

Modelling mineral dust emissions from proglacial valleys of the St. Elias Mountains, Canada

Abstract. Proglacial valleys of western Canada and Alaska demonstrate extensive historical and contemporary records of mineral dust emissions. These contributions remain unresolved by current dust emission modelling and unaccounted for in global emission estimates. We developed a...

Hail trajectories under climate change: disentangling the roles of moisture, melting level and updraft kinematics

Abstract Large hail is expected to become more frequent under climate change. However, uncertainties remain because storm dynamics and hail formation are imperfectly captured by environmental hail proxies and in convection-permitting models, which are the two most frequently used...

Invited perspectives: Towards usable compound event research

Abstract. Supporting stakeholders with science-based decision-making to mitigate and adapt to climate change impacts is a central mandate of the climate research community. In particular, mapping out scenario-dependent climate risk landscapes is one of the most pressing challenge...

Laser‐Induced Local De‐Doping in Organic Semiconductors

ABSTRACT This study explores control of the doping level in organic semiconductor films using scanning continuous wave laser radiation. The feasibility of this one‐step non‐contact post‐deposition approach is explored for a benchmark material system comprising the high‐mobility p...

Probing Strong Coupling in Core–Shell Nanoparticles With Fast Electron Beams

Collective optical excitations, such as localized surface plasmons in metallic nanoparticles and Mie resonances in high‐index dielectrics, play a central role in nanoscale light–matter interactions. When interacting with electronic transitions in matter, they can couple strongly,...

Solution-processed flexible neutron converter foils

Abstract The cost increase of helium-3 has sparked the development of alternative detection technologies, specifically the use of boron carbide converters is one of the pillars of next-generation neutron detectors. While producing high-quality films, sputter-coating is limited in...

Ecological momentary insights into cannabis use and its contexts: a pre-post legalization study in Germany

Abstract Globally, cannabis ranks third in psychoactive substance prevalence after nicotine and alcohol, with heavy use linked to psychosis, anxiety, and depression. However, real-time data on how legal reforms influence consumption remain scarce. This Ecological Momentary Assess...

Coastal upwelling and tropical warm water intrusions are key drivers of interannual fog variability along the southwestern African coast

Abstract. Fog and low clouds (FLCs) are a key source of moisture for ecosystems in the Namib Desert, yet their variability and underlying mechanisms remain poorly quantified. We investigate monthly FLC cover in two fog hotspots: the Angolan Namib (15–17° S) and the Central Namib...

Well-Posedness of the Linear Regularized 13-Moment Equations Using Tensor-Valued Korn Inequalities

Abstract. In this paper, we finally prove the well-posedness of the linearized R13 moment model, which describes, e.g., rarefied gas flows. As an extension of the classical fluid equations, moment models are robust and have been frequently used, yet they are challenging to analyz...

Elucidating the Effect of Ferroelectricity in Bismuth Ferrite Solar Cells

ABSTRACT To investigate the photoresponse of metal‐ferroelectric‐metal (MFM) devices, we sandwich polycrystalline bismuth ferrite between two electrodes of similar work function. We use calcium‐substitution on the A‐site to tailor the properties of bismuth ferrite Bi 1‐x Ca x FeO...

Defocus-Insensitive Microscopy via Spatial Phase Modulation Using End-to-End Learning

Abstract In optical microscopy, high spatial resolution comes at the cost of a short depth of field. This trade-off prevents the formation of sharp images of three-dimensional objects or objects moving in and out of focus. Moreover, it is often difficult to know the extent to whi...

Equivalent Roughness Height for Nondensely Distributed Submerged Obstacles in Open Channel Flows

Abstract The estimation of equivalent sand-grain roughness height ( k s ) for open channel flows is well-established for densely packed roughness but remains ambiguous for nondensely distributed submerged obstacles. This study presents a practical model to predict k s for such co...

Pole-Expansion of the T-Matrix Based on a Matrix-Valued AAA-Algorithm

Abstract The transition matrix (T-matrix) is a complete description of an object’s linear scattering response. As such, it has found wide adoption for the theoretical and computational description of multiple-scattering phenomena. In its original form, the T-matrix describes the...