Technische Universität Darmstadt

Probabilistic robustness for compressor controls in transient pipeline networks

Abstract Uncertainty plays a crucial role in modeling and optimization of complex systems across various applications. In this paper, uncertain gas transport through pipeline networks is considered and a novel strategy to measure the robustness of deterministically computed compr...

Interaction ofWater with TiO2-SupportedSmall Platinum Nanoclusters: Geometric and Electronic Structure vsElectrocatalytic Activity

Abstract Ptn clusters with n = 1, 2, 6, 8, 9, 10, 13, 19, and 29 atoms supported on titania have been investigated with respect to their electrocatalytic performance of the hydrogen evolution reaction (HER) and compared to the catalytic activity of larger nanoparticles (d ≈ 230 n...

Pair distribution analysis of short- and medium-range order of metallic glasses: Direct imaging and diffraction-based approaches

Abstract Pair distribution function (PDF) analysis provides a quantitative framework for resolving short- and medium-range order in glasses. This article summarizes recent advances that extend PDF methods from bulk x-ray and neutron-diffraction methods to local electron microscop...

Symmetry-Broken Biphasic WS2 NanowhiskeredHeterostructures Enable Field-Induced NO2 Sensing

Abstract Van der Waals (vdW) materials have garnered ample interest as next-generation sensors and catalysts, owing to high surface-to-volume ratio, defect tunability, easy modulation of active sites, and convenience in device fabrication. However, one major drawback delimiting s...

Overview of W. K. Clifford's geometric algebras

Abstract This paper presents the very basics of W. K. Clifford's geometric algebras (GAs), which encompass Euclidean GA, as well as of the most important ones for engineering, graphics, virtual reality, signal processing, encryption, neural networks (deep learning), crystallograp...

Tracking the baryon number with nuclear collisions

Baryon quantum number is found to be conserved since baryogenesis in the early Universe. Conventionally, each fractionally charged valence quark is understood to carry one-third of a baryon number. An alternative hypothesis posits that baryon number is instead carried by a baryon...

INFLUENCE OF COMBUSTOR UNSTEADINESS ON THE AEROTHERMAL LOAD OF A HIGH-PRESSURE TURBINE STAGE USING SCALE-RESOLVING CFD SIMULATIONS

Abstract Aerothermal interaction between the combustor and the high-pressure turbine is critical for engine efficiency. Standard steady-state methods fail to capture the highly unsteady flow features at the combustor-turbine interface, leading to uncertainties in thermal load pre...

Generative geospatial modelling with geometric algebra

Abstract The integration of data-driven and knowledge-driven approaches in generative geospatial modelling (GGM) is often hindered by their mathematical incompatibilities. Here, we propose a geometric algebra (GA)-based framework that employs a unified multi-vector representation...

Geometric algebra: an overview about different implementation representations and memory requirements

Abstract Several implementations of geometric algebra are available, and many have been approved in the past and can be found in various software codes. For low-dimensional algebras, representations as a sum of basis blades are typically the most suitable. However, isomorphic or...

Mixed Multilayersof Protein Fibrils with Sodium orCalcium Alginates

Abstract A layer-by-layer approach is used for the preparation of multilayer films on the basis of biomacromolecules and their aggregates, protein fibrils. In this work, the fibrils were prepared from β-lactoglobulin and oat globulin, while sodium and calcium alginates were used...

Robust topology optimization of electric machines using topological derivatives

Abstract Designing high-performance electric machines that maintain their efficiency and reliability under uncertain material and operating conditions is crucial for industrial applications. In this paper, we present a novel framework for robust topology optimization with partial...

Review of Particle Physics *

The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,200 new measurements from 903 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and b...

Over-Allocation in the European Emissions Trading System

Abstract Properly measuring the extent of over-allocation requires constructing a meaningful counterfactual. We propose an approach that exploits a policy change in the allocation of certificates in 2013, when the third phase of the European Emissions Trading System (ETS) started...

Effect of Nickel Content and Cooling Rate on the Microstructure of As-Cast 316 Stainless Steels Part II: Ferrite and Precipitated Phases Under the Same Sampling Conditions

The presence of ferrite in 316 austenitic stainless steel affects its magnetic permeability, and the secondary precipitates formed by ferrite decomposition can further degrade the corrosion resistance, limiting its application in industries such as nuclear power and medical devic...