RWTH Aachen University

SEQUENCES WITH INEQUALITIES

Abstract We consider infinite sequences of positive numbers. The connection between log-concavity and the Bessenrodt–Ono inequality has been the focus of several papers. It has applications in the white noise distribution theory and combinatorics. We improve a recent result by Be...

Delivering building demand flexibility for grid-interactive operation: from perception and cognition to decision, execution, and verification

As both buildings and power systems undergo rapid decarbonization, demand flexibility (DF) in buildings has emerged as a key enabler for renewable energy integration, grid reliability, energy resilience, and efficient and low carbon operation. By dynamically adjusting building en...

A coupled backward stochastic differential equation (BSDE) framework for metastable transition precursors in a stochastically forced Duffing oscillator

This work develops a coupled backward stochastic differential equation framework for metastable transition precursors in a stochastically forced Duffing oscillator. The nonlinear oscillator evolves forward under additive noise, while two coupled backward fields are introduced to...

Effect of intravenously administered norepinephrine on early postoperative tissue perfusion of radial free forearm flaps in the head and neck region – retrospective analysis in the context of continuous flap monitoring

Abstract Background Postoperative flap monitoring following microvascular head and neck reconstruction can be conducted by continuous flap tissue perfusion measurement with an attached surface probe using the Oxygen-to-see (O2C) analysis system. However, intravenously administere...

Comparing End-of-Life carbon accounting methodologies reveals the need for standardization

Abstract This study provides a comparative assessment of existing methodologies and allocation approaches for quantifying End-of-Life (EoL) Greenhouse Gas (GHG) emissions in product life cycles, emphasizing the importance of harmonization and standardization in carbon accounting....

Accelerated Interior Point Algorithms for Rate‐Independent Single Crystal Plasticity at Small Strains

ABSTRACT Rate‐independent single crystal plasticity requires robust solution methods due to the non‐uniqueness of slip system activity. The interior point method, which enforces the yield criterion via slack variables and a so‐called barrier term, has proven both robust and compu...

Continual learning for autoregressive PDE surrogates under evolving physical regimes

Abstract Deploying machine learning surrogates in scientific simulations faces multifaceted challenges, primary among which is the lack of Continual Learning (CL) capabilities—specifically, the inability to adapt to new physical regimes without significantly degrading performance...

Non-isothermal reduction of TeO2 by hydrogen: Integrated distributed-activation-energy-model (DAEM)-shrinking-core-model (SCM) kinetic modeling and enthalpy-entropy compensation analysis

The non-isothermal reduction of TeO 2 (tellurium dioxide) by hydrogen (H 2 ) was investigated using thermal analysis (TG/DTG) techniques at multiple heating rates (1.0, 4.8, 9.6, and 18.8 K/min). Reaction kinetics were evaluated through an integrated Distributed Activation Energy...

Modification of Surface and Subsurface Properties of Additively Manufactured Inconel 718 Components Through Post-Process and Interlayer Machine Hammer Peening

Additive manufacturing (AM) enables rapid, near-net-shape fabrication with high material efficiency, but the resulting components often exhibit surface roughness, microstructural heterogeneity, and tensile residual stresses that reduce their performance. Machine hammer peening (M...

In situ electron microscopy of LaNiO3 transformation during reduction and methane dry reforming

Abstract By in situ electron microscopy we show the intermediate phase formation during decomposition of LaNiO 3 , a model methane dry reforming (DRM) catalyst, under different gas atmospheres. By combining dark- and bright-field imaging with secondary-electron contrast and opera...

A quality measure for repeating multiple-unit spike patterns

We propose a quality measure for spatio-temporal spike patterns (STPs) in multiple-neuron recordings. In such recordings, repeating STPs or pattern repetitions (PRs) are often found, with many of these generated by chance. To rule those out, statistical tests have been developed...

A Multilaboratory Evaluation of Backwater Effects at Bridges Resulting from Diverse Floating Debris Compositions during the 2021 Flood Event in Europe

Abstract The flood event of July 2021 in Western Europe was characterized by water levels far above the 100-year design flood and by billions of euros in damages. During the flood, voluminous debris accumulations of up to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" a...

DECIDER-2: Prospective randomized multicenter phase III trial of decitabine and venetoclax administered in combination with all-trans retinoic acid or placebo in patients with acute myeloid leukemia who are ineligible for induction chemotherapy

Abstract Background Acute myeloid leukemia (AML) is predominantly a disease of older patients with a poor long-term survival. Approval of the combination of venetoclax (VEN) with azacitidine (AZA) or decitabine (DAC) in the European Union in 2021 for the treatment of patients wit...

Transient acute kidney injury following femoral fracture in mice

Aims Femoral shaft fractures are commonly associated with high-energy trauma, and affect individuals of all ages. Kidney dysfunction frequently complicates fracture healing, and trauma-related acute kidney injury (TRAKI) elevates the risk of adverse outcomes. The mechanisms of po...

Snapquery: FAIR Management of Query Sets to Mitigate Query Rot in Knowledge Graphs

Will the “cats” Wikidata SPARQL query example still work in the future? While link rot has been a known issue, the Query Rot problem has not been investigated much in the past. We introduce an approach for quality assessment and refactoring of query sets and evalu- ate its implem...

A Case Report on Cerebral Autoregulation in Posterior Reversible Encephalopathy Syndrome After Aneurysmal Subarachnoid Hemorrhage

BACKGROUND: Disturbed cerebral autoregulation remains a theoretical contributor to posterior reversible encephalopathy syndrome (PRES), but it has not been captured before. We report invasively measured autoregulation indices in a 50-year-old female with aneurysmal subarachnoid h...

How Identity-Specific Workplace Support and Authenticity Drive Individual Entrepreneurial Orientation: Evidence From Sexual and Gender Minoritized Employees

Research on individual entrepreneurial orientation (Ind.EO) has yet to reveal the psychological conditions under which employees demonstrate Ind.EO in the workplace. Addressing this gap, we theorize that authenticity is a crucial mechanism linking identity-specific support to Ind...

Feasibility of a German High-Frequency Neonatal and Pediatric Intensive Care Dataset (AIx-Neo-Guard Dataset): Secondary Data Cohort Study

BACKGROUND: Available information about existing neonatal and pediatric intensive care datasets is scarce. OBJECTIVE: The objective was to evaluate the feasibility of a monocentric high-frequency dataset of neonatal and pediatric intensive care patients in a cohort study. METHODS...

Blood-based versus crystalloid cardiopulmonary bypass priming in left ventricular assist device surgery: impact on end-organ function and survival

OBJECTIVES: Cardiopulmonary bypass (CPB) priming may influence hemodilution, bleeding and end-organ injury during HeartMate 3 (HM3) implantation, but evidence in contemporary left ventricular assist device (LVAD) surgery is limited. METHODS: We retrospectively analysed 92 HM3 imp...