University of Siegen

Gallium Chloride Oxide: Structure Validation of a Direct Wide Bandgap Semiconductor

Gallium chloride oxide (GaClO) was synthesised, and its crystal structure was validated using powder X‐ray diffraction, UV/VIS, NMR, and quantum chemical calculations at the level of density functional theory under periodic boundary conditions. Experimental data confirm a layer‐l...

Quantum metrology of spin sensing with free space electrons

Abstract Recent advances in transmission electron microscopy (TEM) have opened the path toward spin resonance spectroscopy with single-spin sensitivity. To assess this potential, we investigate the quantum precision limits for sensing magnetic moments with free-electron probes. U...

BloomSpan: Memory-Efficient Maximal Frequent Substring Mining for Large-Scale Text

BloomSpan is a memory-efficient algorithm for mining Maximal Contiguous Frequent Phrases (MCFPs) from large text corpora. MCFPs are strictly contiguous token sequences satisfying a minimum document-support threshold; unlike general Sequential Pattern Mining, no gaps are permitted...

Endogenous strategy spaces in sequential- and simultaneous-move duopoly games

Abstract Duopoly markets are widely discussed in industrial economics under the assumptions of quantity and price competition in sequential- and simultaneous-move duopoly games with differentiated goods. We compare Nash and Stackelberg equilibria in which the firms endogenously c...

Illuminating gendered pathways: Exploring energy service demands in rural and peri-urban Nigeria

Gender gaps in energy access are well documented, but evidence on who prioritises which electrical appliances and why remains limited. This paper investigates links between appliance needs, gender roles, and intra-household decision-making in rural and peri-urban Nigeria. Using a...

A Stable Formulation for Wave‐Induced Fracture in Peridynamics

ABSTRACT The bond‐associated quadrature point formulation is a very accurate peridynamic formulation for elasticity, but modeling fracture by the traditional deletion of bonds can trigger severe numerical instabilities. These instabilities are most pronounced for wave‐induced fra...

Total en Bloc Urethra Preservation at Robot-Assisted Prostatectomy (ToP-RAP): A Prospective IDEAL Stage 1–2a Study

Background/objective: Urinary continence recovery after robot-assisted radical prostatectomy remains variable despite technical refinements intended to preserve function. We describe Total en bloc Urethra Preservation at Robot-assisted Prostatectomy (ToP-RAP), a technique that pr...

State-of-the-art electroweak Higgs boson pair production in association with two jets at the LHC in the Standard Model and beyond

We present a systematic comparison of two state-of-the-art tools for the simulation of Higgs boson pair production via vector boson fusion (VBF) as implemented in the Monte- Carlo tools GoSam+Whizard and the POWHEG-BOX. The comparison is carried out at LO and NLO-QCD in the SM an...

AI in the Workplace: The Impact of AI on Perceived Job Decency and Meaningfulness

The proliferation of Artificial Intelligence (AI) in workplaces is transforming how we work. While existing research on human-AI collaboration at work often prioritizes performance, less is known about their experiential outcomes. Through interviews with 24 employees across Infor...

Psychotherapy remission prediction models show limited cross-clinic generalizability in routine outpatient care

Abstract Clinical prediction models for psychotherapy outcomes have the potential to assist therapists in planning a patient’s individual treatment, but their clinical utility depends on maintaining predictive performance across settings. We assessed prediction of post-treatment...

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...

Extending the kinetic mass to higher orders in 1/mQ

A bstract Currently, the kinetic mass is defined in terms of the pole mass and operators at order $$1/{m}_{Q}^{2}$$ , which are known to N 3 LO accuracy in α s . At the same time, the Heavy Quark Expansion (HQE) for inclusive semileptonic decays is known up to and including terms...

New insights into the $$b\rightarrow c \bar{u}q$$ puzzle through Top–Bottom synergies

Abstract Anomalies in the non-leptonic $$\bar{B}^0\rightarrow D^{(*)+}K^{(*)-}$$ B ¯ 0 → D ( ∗ ) + K ( ∗ ) - and $$\bar{B}^0_s\rightarrow D^{(*)+}_s\pi ^-$$ B ¯ s 0 → D s ( ∗ ) + π - decays may be an indication of physics beyond the Standard Model, but the large deviations requir...

Monolithic solution and null-space condensation of internal variables in finite viscoelasticity

Abstract Finite-strain viscoelasticity is commonly discussed from a constitutive perspective, whereas the nonlinear solution architecture induced by time and space discretization is studied less systematically. In this work, we consider a representative viscoelastic model with a...

Effects of Internal Migration on the Life Satisfaction of Apprentices

Abstract Migration can have far-reaching implications for individuals’ life satisfaction (LS). Previous research has mostly examined how migration influences LS using broad samples of the adult population. Moreover, it has not sufficiently considered the influence of other import...

Transient Laser‐Induced Periodic Surface Structures Revealed by Time‐Resolved EUV Diffuse Scattering

ABSTRACT The formation of permanent laser‐induced periodic surface structures (LIPSS) on solid surfaces under impulsive laser irradiation above the damage threshold has been the subject of extensive research. Here, we report the formation of transient quasi‐periodic surface modul...

A Class of Regularization Schemes for Linear Ill-Posed Problems in Banach Spaces Under Low Order Source Conditions

In this work we consider, in a Banach space framework, the regularization of linear ill-posed problems. Our focus is on the recovery of solutions that have a logarithmic source representation. Such cases typically occur in exponentially ill-posed problems like the backwards heat...

Hierarchical Scheduler with Adaptive Time-Budget Reallocation for Time-Triggered Edge-Fog-Cloud Architectures

The lack of determinism restricts the integration of safety-critical applications into Edge–Fog–Cloud (EFC) architectures. Existing EFC schedulers are typically designed for dynamic, best-effort operation based on unmanaged resource allocation and elastic virtualization. This par...

What makes an effective ideator? The distinct roles of cognition, personality, and experience in early-stage venture ideation

A microfoundational account of organizational innovation capability should explain which individual-level attributes distinguish ideators who are better able to generate, select, and elaborate ideas into investment-worthy business concepts. Yet research remains fragmented because...

Cybersecurity Strategies in European SMEs: Navigating Digital Risks and Enhancing Cyber Resilience

Abstract Cybercrime rates have increased rapidly during the last decades, resulting in cybercrimes becoming common crimes and leading to the importance of companies’ attention to cybercrime experience. Therefore, this study examines cybercrime experience and provides insights int...