5,694 results match your criteria: "Universitat Mainz[Affiliation]"
J Phys Chem A
October 2024
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany.
J Chem Phys
October 2024
Institute of Applied and Computational Mathematics, Foundation for Research and Technology-Hellas, Heraklion GR 71110, Greece.
We analyze the displacements of the particles of a glass-forming molecular liquid perpendicular to a confining solid surface using extensive molecular dynamics simulations with atomistic models. In the vicinity of an attractive surface, the liquid molecules are trapped. Transient localization of liquid molecules near the surface introduces a relaxation process related to the escape of molecules from the surface into the dynamics of the interfacial liquid layer.
View Article and Find Full Text PDFJ Chem Phys
October 2024
Institut für Physik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany.
Finite size scaling for a first order phase transition, where a continuous symmetry is broken, is tested using an approximation of Gaussian probability distributions with a phenomenological "degeneracy" factor. Predictions are compared to the data from Monte Carlo simulations of the Lebwohl-Lasher model on L × L × L simple cubic lattices. The data show that the intersection of the fourth-order cumulant of the order parameter for different lattice sizes can be expressed in terms of the relative degeneracy q = 4π of the ordered and disordered phases.
View Article and Find Full Text PDFFront Nucl Med
November 2023
Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of 1.4×10^{17} protons on dump collected in 2021. No evidence for a dark photon signal is observed.
View Article and Find Full Text PDFbioRxiv
September 2024
Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany.
Phys Rev Lett
September 2024
CERN, Geneva, Switzerland.
This Letter presents results from a combination of searches for Higgs boson pair production using 126-140 fb^{-1} of proton-proton collision data at sqrt[s]=13 TeV recorded with the ATLAS detector. At 95% confidence level (CL), the upper limit on the production rate is 2.9 times the standard model (SM) prediction, with an expected limit of 2.
View Article and Find Full Text PDFPhys Rev Lett
September 2024
Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarized ^{6}LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 GeV muon beam at CERN, statistically balancing the existing data on transversely polarized proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements.
View Article and Find Full Text PDFPhys Rev Lett
September 2024
CERN, Geneva, Switzerland.
This Letter presents the first study of the energy dependence of diboson polarization fractions in WZ→ℓνℓ^{'}ℓ^{'}(ℓ,ℓ^{'}=e,μ) production. The dataset used corresponds to an integrated luminosity of 140 fb^{-1} of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector. Two fiducial regions with an enhanced presence of events featuring two longitudinally polarized bosons are defined.
View Article and Find Full Text PDFJ Phys Chem Lett
October 2024
DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg. 206, 2800 Kgs. Lyngby, Denmark.
Local electronic-structure methods in quantum chemistry operate on the ability to compress electron correlations more efficiently in a basis of spatially localized molecular orbitals than in a parent set of canonical orbitals. However, many typical choices of localized orbitals tend to be related by selected, near-exact symmetry operations whenever a molecule belongs to a point group, a feature which remains largely unexploited in most local correlation methods. The present Letter demonstrates how to leverage a recent unitary protocol for enforcing symmetry properties among localized orbitals to yield a high-accuracy estimate of the exact ground-state correlation energy of benzene () in correlation-consistent polarized basis sets of both double- and triple-ζ quality.
View Article and Find Full Text PDFNat Commun
September 2024
Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, 55099, Germany.
Physical reservoir computing leverages the dynamical properties of complex physical systems to process information efficiently, significantly reducing training efforts and energy consumption. Magnetic skyrmions, topological spin textures, are promising candidates for reservoir computing systems due to their enhanced stability, non-linear interactions and low-power manipulation. Traditional spin-based reservoir computing has been limited to quasi-static detection or real-world data must be rescaled to the intrinsic timescale of the reservoir.
View Article and Find Full Text PDFJ Phys Chem A
September 2024
Department Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, Mainz D-55128, Germany.
We present an implementation for the use of Cholesky decomposition (CD) of two-electron integrals within the spin-free Dirac-Coulomb (SFDC) scheme that enables to perform high-accuracy coupled-cluster (CC) calculations at costs almost comparable to those of their nonrelativistic counterparts. While for nonrelativistic CC calculations, atomic-orbital (AO)-based algorithms, due to their significantly reduced disk-space requirements, are the key to efficient large-scale computations, such algorithms are less advantageous in the SFDC case due to their increased computational cost in that case. Here, molecular-orbital (MO)-based algorithms exploiting the CD of the two-electron integrals allow us to reduce disk-space requirements and lead to computational cost in the CC step that is more or less the same as in the nonrelativistic case.
View Article and Find Full Text PDFStress Health
October 2024
Johannes Gutenberg-Universität Mainz, Mainz, Germany.
Soft Matter
September 2024
Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA.
When drops are placed on a sufficiently soft surface, the drop surface tension drives an out of plane deformation around the contact line (, a wetting ridge). For soft elastomeric surfaces that are swollen with a liquid, capillarity from a drop can induce a phase separation in the wetting ridge. Using confocal microscopy, we study the dynamics of phase separation at the wetting ridge of glycerol drops on silicone elastomers, which are swollen with silicone oils of varying viscosity (, molecular weight).
View Article and Find Full Text PDFJ Pers
September 2024
Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA.
Objective: Research challenged the notion that neuroticism correlates with affective variability, suggesting that it may result from statistical artifacts due to the non-normal distribution of negative affect. We aim to advance this line of research by (a) introducing affect balance as a normally distributed measure of affective well-being and (b) examining current affect balance as a moderator of the relationship between neuroticism and affect balance variability.
Method: We meta-analyzed the results of 14 ambulatory assessment datasets (N = 2389 participants, N = 174,423 observations).
Nature
September 2024
JILA, University of Colorado Boulder, Boulder, CO, USA.
Optical atomic clocks use electronic energy levels to precisely keep track of time. A clock based on nuclear energy levels promises a next-generation platform for precision metrology and fundamental physics studies. Thorium-229 nuclei exhibit a uniquely low-energy nuclear transition within reach of state-of-the-art vacuum ultraviolet (VUV) laser light sources and have, therefore, been proposed for construction of a nuclear clock.
View Article and Find Full Text PDFPhys Rev Lett
August 2024
Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π^{-} beam impinging on a transversely polarized ammonia target. Combining the data of both years, we present final results on the amplitudes of five azimuthal modulations, which correspond to transverse-spin-dependent azimuthal asymmetries (TSAs) in the dimuon production cross section. Three of them probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs).
View Article and Find Full Text PDFPeerJ
August 2024
Department of Anaesthesiology, Johannes-Gutenberg Universität Mainz, Mainz, Rhineland-Palatinate, Germany.
Background: Performing an emergency cricothyroidotomy (EC) is extremely challenging, the devices used should be easy to handle and the selected technique reliable. However, there is still an ongoing debate concerning the most superior technique.
Methods: Three different techniques were compared using a standardized, simulated scenario regarding handling, performing, training and decision making: The scalpel-bougie technique (SBT), the surgical anatomical preparation technique (SAPT) and the Seldinger technique (ST).
Int J Surg
December 2024
Department of Pediatric Surgery, University Medical Center of the Johannes Gutenberg-Universität Mainz.
Fortschr Neurol Psychiatr
August 2024
Institut für Immunologie, Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Mainz, Germany.
Background: B-cell targeted therapies are highly effective in multiple sclerosis (MS). Most of these therapies are administered intravenously at long intervals. Ofatumumab, an anti-CD20 antibody that is administered subcutaneously at low doses on a monthly basis due to its high affinity to the target structure, became available for the treatment of MS in 2021.
View Article and Find Full Text PDFGenome Biol
August 2024
Faculty of Biology, Johannes Gutenberg-Universität Mainz, Biozentrum I, Hans-Dieter-Hüsch-Weg 15, Mainz, 55128, Germany.
Background: Reproducibility is a major concern in biomedical studies, and existing publication guidelines do not solve the problem. Batch effects and quality imbalances between groups of biological samples are major factors hampering reproducibility. Yet, the latter is rarely considered in the scientific literature.
View Article and Find Full Text PDFJ Chem Phys
August 2024
Fachrichtung Chemie, Universität des Saarlandes, Campus B2.2, D-66123 Saarbrücken, Germany.
Nat Commun
August 2024
QUANTUM, Institut für Physik, Universität Mainz, Staudingerweg 7, 55128, Mainz, Germany.
Sci Adv
August 2024
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, 22860 Ensenada, Baja California, Mexico.
The southwestern tropical Pacific is a key center for the Interdecadal Pacific Oscillation (IPO), which regulates global climate. This study introduces a groundbreaking 627-year coral Sr/Ca sea surface temperature reconstruction from Fiji, representing the IPO's southwestern pole. Merging this record with other Fiji and central tropical Pacific records, we reconstruct the SST gradient between the southwestern and central Pacific (SWCP), providing a reliable proxy for IPO variability from 1370 to 1997.
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