Results 111 to 120 of about 185,392 (314)

The decay of cyclonic eddies by Rossby wave radiation

, 1998
It is argued that because shallow water cyclones on a β-plane drift westward at a speed equal to an available Rossby wave phase speed, they must radiate energy and cannot, therefore, be steady. The form of the Rossby wave wake accompanying a quasi-steady
McDonald, NR
core  

SiGe process integrated on-chip dipole antenna on finite size ground plane [PDF]

, 2013
This letter investigates the effect of a finite-size ground plane on the radiation pattern and reflection coefficient of a SiGe process integrated on-chip antenna.
Seyyedesfahlan, Mirmehdi, Tekin, İbrahim, Goettel, Benjamin, Kaynak, Mehmet   +3 more
core   +1 more source

Frame rate improvement in coherent plane-wave compounding using null subtraction imaging

AIP Advances
Coherent plane-wave compounding (CPWC) has attracted significant attention in preclinical research and clinical diagnosis. However, a trade-off exists in CPWC between the image quality and frame rate.
Yijun Xu, Boyi Li, Jianwen Luo, Xin Liu, Dean Ta   +4 more
doaj   +1 more source

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

International Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir, Sarah Mechhoud, Taous‐Meriem Laleg‐Kirati   +2 more
wiley   +1 more source

The Wiener-Hopf-Hilbert technique applied to problems in diffraction

, 1999
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A number of diffraction problems which have practical applications are examined using the Wiener-Hopf-Hilbert technique.
Barton, P.G., Barton, Peter
core  

Stability of Plane Wave Solutions in Complex Ginzburg--Landau Equation with Delayed Feedback

, 2014
We perform bifurcation analysis of plane wave solutions in a one-dimensional complex cubic-quintic Ginzburg--Landau equation with delayed feedback.
Vladimirov, Andrei G., Puzyrev, Dmitry, Gurevich, Svetlana V., Yanchuk, Serhiy   +3 more
core   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Propagator and wave-equation inversion for near-receiver material properties [PDF]

, 2004
Near-receiver material properties are required for the separation of the recorded wavefield into upgoing and downgoing P and S waves, and are also important for static time-shift corrections.
Trampert, J., Curtis, A.; id_orcid, van Vossen, R.   +2 more
core   +1 more source

Spin Angular Momentum at the Focus of a Superposition of an Optical Vortex and a Plane Wave with Linear Polarizations

Photonics
In this paper, tight focusing of a superposition of a vortex laser beam with topological charge n with linear polarization and a plane wave with the same linear polarization directed along the horizontal axis is considered.
Victor V. Kotlyar, Sergey S. Stafeev, Alexey M. Telegin, Elena S. Kozlova   +3 more
doaj   +1 more source