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An automated optimization pipeline for clinical-grade computer-assisted planning of high tibial osteotomies under consideration of weight-bearing
(2023)Computer Assisted Surgery3D preoperative planning for high tibial osteotomies (HTO) has increasingly replaced 2D planning but is complex, time-consuming and therefore expensive. Several interdependent clinical objectives and constraints have to be considered, which often requires multiple rounds of revisions between surgeons and biomedical engineers. We therefore developed an automated preoperative planning pipeline, which takes imaging data as an input to generate ...Journal Article -
Exponential Convergence of \(hp\)-FEM for the Integral Fractional Laplacian in Polygons
(2023)SIAM Journal on Numerical AnalysisWe prove exponential convergence in the energy norm of \(hp\)-finite element discretizations for the integral fractional Laplacian of order \(2s\in (0,2)\) subject to homogeneous Dirichlet boundary conditions in bounded polygonal domains \(\Omega \subset{\mathbb R}^2\). Key ingredients in the analysis are the weighted analytic regularity from [M. Faustmann, C. Marcati, J. M. Melenk, and C. Schwab, SIAM J. Math. Anal., 54 (2022), pp. ...Journal Article -
Design of Defected Non-hermitian Chains of Resonator Dimers for Spatial and Spatio-temporal Localizations
(2023)SIAM Journal on Applied MathematicsThe aim of this article is to advance the field of metamaterials by proposing formulas for the design of high-contrast metamaterials with prescribed subwavelength defect mode eigenfrequencies. This is achieved in two settings: (i) design of non-Hermitian static materials and (ii) design of instantly changing non-Hermitian time-dependent materials. The design of static materials is achieved via characterizing equations for the defect mode ...Journal Article -
Lactobacillus plantarum modulate gut microbiota and intestinal immunity in cyclophosphamide-treated mice model
(2023)Biomedicine & PharmacotherapyGut microbiota (GM) contributes to the production of immune-regulatory molecules and cytokines. However, our understanding regarding intricate relationship between Lactobacillus plantarum and GM on regulation of immune function remained limited. To investigate the effect of Lactobacillus plantarum on an immunosuppressed mouse model, we employed cyclophosphamide treatment and conducted various analysis including H&E (hematoxylineosin ...Journal Article -
Probing small Bjorken-x nuclear gluonic structure via coherent J/ψ photoproduction in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
(2023)Physical Review LettersJournal Article -
Chemical Impact of Stratospheric Alumina Particle Injection for Solar Radiation Modification and Related Uncertainties
(2023)Geophysical Research LettersCompared to stratospheric SO2 injection for climate intervention, alumina particle injection could reduce stratospheric warming and associated adverse impacts. However, heterogeneous chemistry on alumina particles, especially chlorine activation via ${\text{ClONO}}_{2}+\text{HCl}\stackrel{\text{surf}}{\to }{\text{Cl}}_{2}+{\text{HNO}}_{3}$, is poorly constrained under stratospheric conditions, such as low temperature and humidity. This ...Journal Article -
Directly-trained Spiking Neural Networks for Deep Reinforcement Learning: Energy efficient implementation of event-based obstacle avoidance on a neuromorphic accelerator
(2023)NeurocomputingSpiking Neural Networks (SNN) promise extremely low-power and low-latency inference on neuromorphic hardware. Recent studies demonstrate the competitive performance of SNNs compared with Artificial Neural Networks (ANN) in conventional classification tasks. In this work, we present an energy-efficient implementation of a Reinforcement Learning (RL) algorithm using SNNs to solve an obstacle avoidance task performed by an Unmanned Aerial ...Journal Article -
⁷¹Ga NMR Signatures of Lewis and Brønsted Acid Sites in Gallium Silicates Evidenced and Deciphered upon Interaction with Probe Molecules
(2023)The Journal of Physical Chemistry CDetermining the structure of Ga surface sites in Ga-based materials used in catalysis is critical for understanding their reactivity. However, obtaining molecular-level insights into their structures remains challenging. Here, using solid-state nuclear magnetic resonance (NMR) spectroscopy (⁷¹Ga, ³¹P, and ¹⁵N), two different families of acid sites are identified in a gallosilicate material (Ga@SiO₂), prepared via surface organometallic ...Journal Article -
Gap-Filled Multivariate Observations of Global Land–Climate Interactions
(2023)Journal of Geophysical Research: AtmospheresThe volume of Earth system observations has grown massively in recent decades. However, multivariate or multisource analyses at the interface of atmosphere and land are still hampered by the sparsity of ground measurements and the abundance of missing values in satellite observations. This can hinder robust multivariate analysis and introduce biases in trends. Nevertheless, gap-filling is often done univariately, which can obscure physical ...Journal Article -
Lithospheric delamination as the driving mechanism of intermediate-depth seismicity in the Bucaramanga Nest, Colombia
(2023)Scientific ReportsThe Bucaramanga nest (BN) is an area of exceptionally strong intermediate-depth seismicity localized in a narrow zone at 150–170 km depth beneath the continental plate in Colombia. To explain the very unusual mantle seismicity cluster in this area, we built a seismic velocity model in the vicinity of BN with the use of local earthquake tomography and developed a numerical hydromechanical model. Our seismic model shows a strong high-velocity ...Journal Article