University of Stuttgart

From Caesar to RSA: A CAMMP‐Based Encryption Workshop for High‐School Classes

ABSTRACT Encryption has been, and remains, a topic of enduring relevance, reflecting humanity's persistent desire for secure communication. This 3‐hour workshop, developed within the CAMMP framework, aims to introduce participants to the principles of secure communication while f...

A p-adaptive hybridizable discontinuous Galerkin spectral element method for electrostatic particle-in-cell simulations

This paper extends the high-order hybridizable discontinuous Galerkin spectral element method (HDG-SEM) for electrostatic particle-in-cell (PIC) simulations developed by Pfeiffer et al. (2019) to support p-adaptation. This approach enables element-local refinement of the polynomi...

On Hyperbolic Approximations for a Class of Dispersive and Diffusive-Dispersive Equations

Abstract We introduce novel approximate systems for dispersive and diffusive-dispersive equations with nonlinear fluxes. For purely dispersive equations, we construct a first-order, strictly hyperbolic approximation. Local well-posedness of smooth solutions is achieved by constru...

Chiral Rh Diene NHC Complexes and Their Application in Rh-Catalyzed Cycloisomerization of Enynes

Abstract Chiral dienes and N-heterocyclic carbenes (NHC) are important ligands for transition-metal catalysis. Surprisingly, both ligand classes are rarely employed together in Rh complexes. To get more detailed insight into the interaction between NHC and diene ligand simultaneo...

Determination of vehicle controllability and stability metrics in a target-oriented virtual chassis development process

Abstract Vehicle chassis development is increasingly performed virtually based on systems engineering approaches. A characteristics-based system engineering approach that is oriented towards the V-model enables the definition, development, monitoring and tracking of overall vehic...

Altermagnetic spin textures: Emergent electrodynamics, quantum geometry, and probes

Emergent electrodynamics arising from spatially and temporally varying magnetic textures provides a framework for spin control in quantum materials. While this principle is established for ferromagnetic and antiferromagnetic textures, its consequences for altermagnets—magnetic or...

Quadratic word equations with regular constraints and the exponent of periodicity

Abstract In this article, we study word equations in free semigroups and the conjecture that the existence of infinitely many solutions entails the existence of solutions with arbitrarily large exponent of periodicity. We examine this question in the broader framework of word equ...

The Road to Nowhere: Being Rooted in a Region Does Little to Predict Support for Populist Parties or Opposition to Migration and Social Change

ABSTRACT In his influential book The road to somewhere David Goodhart claims that a split between a majority of people who are rooted in particular places or groups (the “Somewheres”) and a minority of people who are or can be at home anywhere in the world (the “Anywheres”) is at...

Kinetic Modeling of Enzymatic Cephalexin Synthesis with Neural ODEs and Surrogate-Accelerated Bayesian Inference

Abstract α-Amino ester hydrolases offer a promising route to the stereoselective synthesis of β-lactams such as cephalexin. However, published kinetic studies have encountered difficulty when extended beyond fitting of the data, indicating practical nonidentifiability of the unde...

Crystallized: Towards Resinless Fabrication of Complex Nonlinear Spatial Forms Using Fiber-Reinforced Crystal Composites (FRCCs) and Coreless Filament Winding (CFW) Techniques

Petroleum-based resins used in fiber-reinforced composites (FRCs) offer high performance but carry a substantial environmental burden. This study investigates crystallized composites (CCs) as a resinless alternative capable of binding loose cotton reinforcement within a crystalli...

In situ learning-based spin engineering of pulsed dynamic nuclear polarization

Pulsed dynamic nuclear polarization (DNP) is currently receiving substantial interest as a means to enhance the sensitivity of nuclear magnetic resonance (NMR) and magnetic resonance imaging by orders of magnitude. It has also received much attention as a central ingredient in ma...

Exciting Objects for Historical Research—Mechanical Gyroscopes in Germany Between 1925 and 1975

ABSTRACT The contribution presents a dissertation project in the history of science and technology that uses gyro instruments as objects of historical research, offering exciting opportunities for investigation using a wide variety of methodological approaches. This paper present...

Vibration analysis for condition monitoring of synchronous belts during operation

Abstract In this study the vibration behavior of synchronous belts with representative damages is investigated using a test bench and a design of experiments approach. A laser triangulation sensor is used to record the vibrations of undamaged belts and belts with artificially int...

IMU-based identification of rowing conditions through supervised machine learning

Rowing combines on-water and ergometer-based training, while inertial measurement units (IMUs) offer a practical approach for field-based biomechanical monitoring. This study examined whether trunk-mounted IMU data can distinguish static Concept2 (C2), dynamic RP3, and on-water r...

Repeated stretch-shortening cycles enhance force and work despite brief deactivation between cycles

Stretch-shortening cycles (SSCs) enhance force and mechanical work compared with pure shortening contractions and are fundamental to locomotion. Although SSC mechanics are well studied, it remains unclear whether mechanical cycle-to-cycle carryover effects persist across repeated...

A Partitioned Coupling Approach for Electromechanics Simulations of Skeletal Muscles Using FEBio

ABSTRACT This work presents a partitioned coupling approach for electromechanical simulations of skeletal muscles. For the first time, we couple our highly specialized electrophysiology solver, which computes both force generation in muscle cells and action potential propagation...

Electric space propulsion at the Institute of Space Systems Stuttgart: from low-power to high-power for nuclear electric propulsion applications

Abstract Future deep-space exploration missions require propulsion systems that exceed the performance capabilities of conventional chemical propulsion technologies. In particular, missions demanding high total velocity increment together with acceptable propellant mass fractions...

Impact of bundling and sequencing of measures in retrofit roadmaps with hybrid heat pump systems – A case study for a municipal non-residential building in Germany

Achieving climate neutrality in the building sector necessitates a well-balanced mix, entailing measures that reduce the space heating demand and measures to decarbonize the heat supply system. In non-residential buildings, the space heating demand can be reduced through both ren...

Adenylation Domain Engineering Enables Biosynthesis of an Improved Polymyxin Antibiotic

ABSTRACT Polymyxins are potent nonribosomal peptide antibiotics, yet their clinical use is limited by a narrow therapeutic window and nephro‐/neurotoxicity. Conventional efforts to improve these agents rely on the incorporation of nonnatural building blocks that cannot be accesse...

Homological dimensions of Schur algebras $S(p,2p)$ and an Auslander-type correspondence

We study the homological properties of Schur algebras S(p, 2p) over a field k of positive characteristic p , focusing on their interplay with the representation theory of quotients of group algebras of symmetric groups via Schur–Weyl duality. Schur–Weyl duality establishes that t...