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Conditioned Pain Modulation Decreases Over Time in Patients With Neuropathic Pain Following a Spinal Cord Injury
(2020)Neurorehabilitation and Neural RepairBackground Neuropathic pain is a major problem following spinal cord injury (SCI). Central mechanisms involved in the modulation of nociceptive signals have been shown to be altered at the chronic stage, and it has been hypothesized that they might play a role in the development of chronic pain. Objective This prospective longitudinal study aimed to describe the evolution of pain modulation mechanisms over time after SCI, and to ...Journal Article -
The Pitfalls in Nonaqueous Electrochemistry of Al-Ion and Al Dual-Ion Batteries
(2020)Advanced Energy MaterialsThe quest for cost-effective and TWh-scale stationary energy storage systems has caused a surge of research on novel post-Li-ion batteries that consist solely of abundant chemical elements. Nonaqueous Al batteries, inter alia, are appealing as an inexpensive electrochemical technology owing to the high natural abundance of aluminum. A critical assessment of the literature on Al batteries, however, points to numerous misconceptions in this ...Journal Article -
Monster mash: A single-view approach to casual 3D modeling and animation
(2020)ACM Transactions on GraphicsWe present a new framework for sketch-based modeling and animation of 3D organic shapes that can work entirely in an intuitive 2D domain, enabling a playful, casual experience. Unlike previous sketch-based tools, our approach does not require a tedious part-based multi-view workflow with the explicit specification of an animation rig. Instead, we combine 3D inflation with a novel rigidity-preserving, layered deformation model, ARAP-L, to ...Journal Article -
Shape approximation by developable wrapping
(2020)ACM Transactions on GraphicsWe present an automatic tool to approximate curved geometries with piece-wise developable surfaces. At the center of our work is an algorithm that wraps a given 3D input surface with multiple developable patches, each modeled as a discrete orthogonal geodesic net. Our algorithm features a global optimization routine for effectively finding the placement of the developable patches. After wrapping the mesh, we use these patches and a ...Journal Article -
Weyl fermions, Fermi arcs, and minority-spin carriers in ferromagnetic CoS2
(2020)Science AdvancesMagnetic Weyl semimetals are a newly discovered class of topological materials that may serve as a platform for exotic phenomena, such as axion insulators or the quantum anomalous Hall effect. Here, we use angle-resolved photoelectron spectroscopy and ab initio calculations to discover Weyl cones in CoS2, a ferromagnet with pyrite structure that has been long studied as a candidate for half-metallicity, which makes it an attractive material ...Journal Article -
Nitride-Derived Copper Modified with Indium as a Selective and Highly Stable Catalyst for the Electroreduction of Carbon Dioxide
(2019)ChemSusChemThe lack of efficient catalysts prevents the electrocatalytic reduction of carbon dioxide from contributing to the pressing target of a carbon‐neutral economy. Indium‐modified copper nitride was identified as a stable electrocatalyst selective toward CO. In2O3/Cu3N showed a Faradaic efficiency of 80 % at 0.5 V overpotential for at least 50 h, in stark contrast to the very limited stability of the benchmark In2O3/Cu2O. Microfabricated ...Journal Article -
The long-term impact of employment bans on the economic integration of refugees
(2018)Science AdvancesMany European countries impose employment bans that prevent asylum seekers from entering the local labor market for a certain waiting period upon arrival. We provide evidence on the long-term effects of these employment bans on the subsequent economic integration of refugees. We leverage a natural experiment in Germany, where a court ruling prompted a reduction in the length of the employment ban. We find that, 5 years after the waiting ...Journal Article -
Electronic and Geometric Structures of Paramagnetic Diazadiene Complexes of Lithium and Sodium
(2018)ChemistryOpenThe electronic and molecular structures of the lithium and sodium complexes of 1,4‐bis(2,6‐diisopropylphenyl)‐2,3‐dimethyl‐1,4‐diazabutadiene (Me2DADDipp) were fully characterized by using a multi‐frequency electron paramagnetic resonance (EPR) spectroscopy approach and crystallography, together with density functional theory (DFT) calculations. EPR measurements, using T1 relaxation‐time‐filtered pulse EPR spectroscopy, revealed the ...Journal Article -
Quantum interference of topological states of light
(2018)Science AdvancesTopological insulators are materials that have a gapped bulk energy spectrum but contain protected in-gap states appearing at their surface. These states exhibit remarkable properties such as unidirectional propagation and robustness to noise that offer an opportunity to improve the performance and scalability of quantum technologies. For quantum applications, it is essential that the topological states are indistinguishable. We report ...Journal Article -
On the relation between hybrid and pure spinor string theory
(2010)Journal of High Energy PhysicsIn this paper we revisit Berkovits’ pure spinor formalism in lower dimensions. We are particularly interested in relating a six-dimensional pure spinor action previously constructed in the literature to other superstring formalisms. In order to gain some insight into six-dimensional pure spinors, we first derive their action by gauge-fixing the classical six-dimensional Green-Schwarz action. We then consider a hybrid pure spinor construction ...Journal Article