TU Wien

Multi-facility GNSS antenna calibration

Abstract Accurate antenna calibrations are a cornerstone of high-quality global navigation satellite systems (GNSS) positioning, time and frequency transfer, precise orbits, and troposphere estimates. The international GNSS service (IGS) antenna committee maintains antenna phase...

Demystifying Experimental Parameters in Optical Photothermal Imaging in Aqueous Media

Abstract Optical photothermal infrared (O-PTIR) spectroscopy is an indirect mid-infrared spectral imaging technique that enables label-free chemical analysis with submicrometer resolution. The technique is often used for analyzing cells and tissues and is discussed as capable of...

An information-theoretic proof of the Planckian bound for thermalization

Abstract It has been conjectured that the speed of thermalization is universally constrained by a Planckian timescale, τ Pl = ℏ /( k B T ), determined solely by the reduced Planck constant ℏ, Boltzmann’s constant ( k B ) and the temperature ( T ). However, a general and model-ind...

Empirical Evidence on Platform Passenger Distribution and Dwell-Time Impacts in Urban Rail Networks

This study empirically examines the spatial distribution of passengers on urban rail platforms and its impact on boarding and alighting. It combines two complementary datasets from Vienna: (i) automated passenger counts, which record approximately 4.4 million boarding and alighti...

Properties of stable massive quark stars in holography

Abstract We study a holographic D3/D7 system, whose dilaton profile has been phenomenologically adjusted in the infrared. The model is used to describe a deconfined yet massive quark phase of QCD at finite density, concluding that the equation of state of such a phase can be stif...

Exploring L-tyrosine and L-DOPA biosynthesis in faba bean ( Vicia faba L.)

BACKGROUND AND AIMS: L-DOPA is an important pharmaceutical that accumulates to high levels in the legume faba bean (Vicia faba). L-DOPA is likely derived from L-tyrosine but the responsible enzyme (L-tyrosine oxidase) remains unknown. Availability of L-tyrosine may be a key facto...

From the Shire to the Archive and back again: A journey to lasting data

Creating, processing and analysing research data marks the beginning of a journey, which results not only in new knowledge but should also produce lasting and sustainable data in accordance with the FAIR Guiding Principles. Yet for many researchers, navigating the vast landscape...

From the Shire to the Archive and back again: A journey to lasting data

Creating, processing and analysing research data marks the beginning of a journey, which results not only in new knowledge but should also produce lasting and sustainable data in accordance with the FAIR Guiding Principles. Yet for many researchers, navigating the vast landscape...

Stressability of semi-discrete frameworks

Abstract In this paper we study the stressability of semi-discrete frameworks in the plane which are generated by a discrete sequence of smooth curves. We characterize their stressability property by the existence of stresses fulfilling certain difference-differential equation. I...

Receding Horizon Trajectory Optimization Through Path Segments and Waypoints

Abstract Many robotic manipulation tasks require both unconstrained motion in free space and precise tracking of constrained paths. Seamlessly switching between these motion types while replanning trajectories online, for example, during human–robot interaction, is a challenging...

Aromatic Molecular Emitters in a Hexagonal Boron Nitride Stack

Abstract Single polycyclic aromatic hydrocarbon molecules embedded in organic matrices are excellent narrow line width quantum emitters. Extending this host–guest setting to van der Waals materials offers the opportunity to combine the preeminent properties of molecular emitters...

Evaluation of oxygen partial pressure, absolute pressure, and heating rate effects on the thermochemical conversion of a low volatile coal

Understanding the thermochemical conversion of pulverized coal (PC) in the blast furnace raceway zone is essential for improving coal utilization and process efficiency. However, determining kinetic parameters under raceway conditions remains challenging because direct measuremen...

Continuous-wave laser absorption spectroscopy of the thorium-229 nucleus

Abstract The low-energy nuclear transition in thorium-229 (Th-229) has been excited in thorium-doped crystals with laser light 1–3 , opening the path towards a highly stable and robust solid-state optical nuclear clock 4 . The required laser radiation at 148-nm wavelength has so...

Vacancy diffusion in transition metal diborides using diverse machine-learning potentials

Machine-learning interatomic potential (MLIP)-based molecular dynamics enables efficient exploration of mass-transport mechanisms in complex materials together with quantitative determination of diffusion coefficients at finite temperatures. Using an identical training dataset, w...

FEM-BEM coupling for the high-frequency Helmholtz problem

Abstract We present a wavenumber-explicit analysis of the FEM-BEM coupling methods for time-harmonic Helmholtz problems proposed in [1] for conforming discretizations and in [2] for discontinuous Galerkin (DG) volume discretizations. We show that the conditions that kh / p be suf...

Measuring and modelling the structural dynamics of poricidal anthers: a mechatronic approach

The mechanical dynamics of poricidal stamens play a crucial role in buzz pollination, but they have only been studied in a few species showing comparatively less curvature. This paper presents an integrated experimental-computational approach to characterize the dynamic behaviour...

Quantum Chemical Microsolvation via Free Energy–Based Solvation Site Identification

Abstract In quantum chemical descriptions of solutions, solvents are treated either implicitly, accounting only for bulk properties, or explicitly by including solvent molecules in the calculations. Although explicit treatments are more accurate, they are often computationally pr...

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...

A residual load-based methodology for assessing climate change impacts on electricity systems and identifying extreme events

The planning and operation of electricity systems with high shares of variable intermittent renewable energies (VRE) require a solid understanding of weather impacts, which are becoming increasingly influenced by climate change and associated extreme events. However, there is a l...

The impact of footwear on human talar trabecular architecture

The evolution of habitual bipedalism was a defining milestone in human history, yet fossil evidence indicates substantial variation in how bipedality was practiced. Trabecular bone, which responds throughout life to joint loading and orientation, offers a powerful way to investig...