Results 31 to 40 of about 91,388 (321)

Addition theorems for spin spherical harmonics. II Results

, 2011
Based on the results of part I, we obtain the general form of the addition theorem for spin spherical harmonics and give explicit results in the cases involving one spin-$s'$ and one spin-$s$ spherical harmonics with $s',s=1/2$, 1, 3/2, and $|s'-s|=0$, 1.
Antonio O Bouzas, Biendenharn L C, Biendenharn L C, Bouzas A O, Edmonds A R, Galindo A, Jackson J D, Judd B R, Nachtmann O, Varshalovich D A, Wigner E P   +10 more
core   +1 more source

Obtaining Potential Field Solution with Spherical Harmonics and Finite Differences [PDF]

, 2011
Potential magnetic field solutions can be obtained based on the synoptic magnetograms of the Sun. Traditionally, a spherical harmonics decomposition of the magnetogram is used to construct the current and divergence free magnetic field solution.
Bart van der Holst, Gábor Tóth, Tran, van der Holst, Zhenguang Huang   +4 more
core   +1 more source

Complete orthogonal Appell systems for spherical monogenics

, 2011
In this paper, we investigate properties of Gelfand-Tsetlin bases mainly for spherical monogenics, that is, for spinor valued or Clifford algebra valued homogeneous solutions of the Dirac equation in the Euclidean space.
Lavicka, R.
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

From Spherical Harmonics to Gaussian Beampatterns

Acoustics
The use of multipoles, otherwise called spherical wavefunctions, has been explored for acoustic fields that can be omnidirectional, for example, in scattering theory.
Kevin J. Parker, Miguel A. Alonso
doaj   +1 more source

High order vibration modes of glass embedded AgAu nanoparticles

, 2009
High resolution low frequency Raman scattering measurements from embedded AgAu nanoparticles unveil efficient scattering by harmonics of both the quadrupolar and the spherical modes.
Adichtchev, S., Bachelier, G., Duval, E., Etienne, S., Mermet, A., Saviot, L., Sirotkin, S., Stephanidis, B.   +7 more
core   +3 more sources

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Spherical Harmonics for Robust Next-Best-View Estimation

IEEE Access
As 3D depth cameras become more affordable, the additional depth information proves useful in industrial setups. However, with a multiview camera configuration, the complete coverage of a 3D model can only be accurately captured from several views.
Alexandru Pop, Levente Tamas
doaj   +1 more source

SHTools: Tools for Working with Spherical Harmonics

Geochemistry, Geophysics, Geosystems, 2018
Geophysical analyses are often performed in spherical geometry and require the use of spherical harmonic functions to express observables or physical quantities.
Mark A. Wieczorek, Matthias Meschede
doaj   +1 more source