Results 61 to 70 of about 4,238 (224)
The Journal of Physiology, EarlyView.Abstract figure legend Time‐resolved estimation of cardiac rhythmicity parameters. A pipeline is shown for the estimation of the fluctuating cardiac parameters, based on the Poincaré plot. The Poincaré plot illustrates the successive changes in interbeat intervals (IBI).
Diego Candia‐Rivera +3 more
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Wigner negativity, random matrices and gravity
Journal of High Energy PhysicsGiven a choice of an ordered, orthonormal basis for a D-dimensional Hilbert space, one can define a discrete version of the Wigner function — a quasi-probability distribution which represents any quantum state as a real, normalized function on a discrete
Ritam Basu +5 more
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Earthquake Spectra, Volume 42, Issue 2, May 2026.This study investigates the vertical dynamic response of a 52‐story high‐rise building in downtown Los Angeles using small‐magnitude earthquake data recorded by the Community Seismic Network. While seismic design traditionally emphasizes horizontal ground motion, vertical accelerations can have a significant impact on tall structures, leading to ...
Viviana Vela +4 more
wiley +1 more source
What If Each Voxel Were Measured With a Different Diffusion Protocol?
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2277-2290, April 2026.ABSTRACT Purpose Expansion of diffusion MRI (dMRI) both into the realm of strong gradients and into accessible imaging with portable low‐field devices brings about the challenge of gradient nonlinearities. Spatial variations of the diffusion gradients make diffusion weightings and directions non‐uniform across the field of view, and deform perfect ...
Santiago Coelho +7 more
wiley +1 more source
EncyclopediaWigner functions are a distribution function on phase space that allow to represent the state of a quantum-mechanical system. They are in many ways similar to classical phase space probability distributions, but can, in contrast to these, be negative.
Michael te Vrugt
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Moyal equation—Wigner distribution functions for anharmonic oscillators
Journal of Mathematical Physics, 2021 We investigate the structure of Wigner distribution functions of energy eigenstates of quartic and sextic anharmonic oscillators. The corresponding Moyal equations are shown to be solvable, revealing new properties of Schrödinger eigenfunctions of these oscillators.
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ASH: A Multi‐Scale, Multi‐Theory Modeling Program
Journal of Computational Chemistry, Volume 47, Issue 8, 30 March 2026.ASH is a Python‐based computational chemistry software for multi‐scale and multi‐theory computations (including QM/MM and ONIOM) and MD simulations. The program is designed for flexible workflows of molecular and biomolecular systems, allowing geometry optimizations, numerical frequencies, high‐level thermochemistry, MD and free‐energy simulations, NEB
Ragnar Bjornsson
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Properties and applications of the Kirkwood–Dirac distribution
New Journal of PhysicsThere are several mathematical formulations of quantum mechanics. The Schrödinger picture expresses quantum states in terms of wavefunctions over, e.g. position or momentum.
David R M Arvidsson-Shukur +8 more
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Wigner distribution function of superposed quantum states for a time-dependent oscillator-like Hamiltonian system [PDF]
, 2012 Jeong Hee Choi, Song Ji, Seong Hong
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Wigner Distributions Using Light-Front Wave Functions [PDF]
Proceedings of QCD Evolution 2017 — PoS(QCDEV2017), 2018 We report on some recent advances in calculating the Wigner distributions for quarks and gluons, using overlaps of light-front wave functions.
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