Results 71 to 80 of about 960,683 (280)

Empirical Expression for AC Magnetization Harmonics of Magnetic Nanoparticles under High-Frequency Excitation Field for Thermometry

Nanomaterials, 2020
The Fokker–Planck equation accurately describes AC magnetization dynamics of magnetic nanoparticles (MNPs). However, the model for describing AC magnetization dynamics of MNPs based on Fokker-Planck equation is very complicated and the numerical ...
Zhongzhou Du, Dandan Wang, Yi Sun, Yuki Noguchi, Shi Bai, Takashi Yoshida   +5 more
doaj   +1 more source

Background independent quantization and wave propagation

, 2009
We apply a type of background independent "polymer" quantization to a free scalar field in a flat spacetime. Using semi-classical states, we find an effective wave equation that is both nonlinear and Lorentz invariance violating.
A. M. Kamchatnov, C. Rovelli, G. T. Zatsepin, Golam Mortuza Hossain, M. Bojowald, Sanjeev S. Seahra, Viqar Husain   +6 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Numerical experiments with single mode gyrotron equations

Mathematical Modelling and Analysis, 2012
Gyrotrons are microwave sources whose operation is based on the stimulated cyclotron radiation of electrons oscillating in a static magnetic field. This process is described by the system of two complex differential equations: nonlinear first order ...
Andrejs Reinfelds, Olgerts Dumbrajs, Harijs Kalis, Janis Cepitis, Dana Constantinescu   +4 more
doaj   +1 more source

Amplitude equations for electrostatic waves: Multiple species [PDF]

Journal of Mathematical Physics, 1998
The amplitude equation for an unstable electrostatic wave is analyzed using an expansion in the mode amplitude A(t). In the limit of weak instability, i.e., γ→0+ where γ is the linear growth rate, the nonlinear coefficients are singular and their singularities predict the dependence of A(t) on γ.
Crawford, John David, Jayaraman, Anandhan   +1 more
openaire   +2 more sources

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Post-Minkowskian scattering angle in Einstein gravity

Journal of High Energy Physics, 2020
Using the implicit function theorem we demonstrate that solutions to the classical part of the relativistic Lippmann-Schwinger equation are in one-to-one correspondence with those of the energy equation of a relativistic two-body system.
N.E.J. Bjerrum-Bohr, Andrea Cristofoli, Poul H. Damgaard   +2 more
doaj   +1 more source

Homogeneous Relaxation at Strong Coupling from Gravity

, 2011
Homogeneous relaxation is a ubiquitous phenomenon in semiclassical kinetic theories where the quasiparticles are distributed uniformly in space, and the equilibration involves only their velocity distribution.
Ayan Mukhopadhyay, C. Fefferman, D. Enskog, E. Witten, Ramakrishnan Iyer, S. Chapman, W. Florkowski   +6 more
core   +1 more source

Amplitude Equation of Higher-Dimensional Nikolaevskii Turbulence [PDF]

Progress of Theoretical Physics, 2003
Summary: The scaling structure of higher-dimensional Nikolaevskii turbulence described by \(\dot\phi(r, t) = -\nabla^2 [\{\varepsilon - (\nabla^2 + k_0^2)^2\}\phi] + (\nabla\phi)^2\) is investigated for small \(\varepsilon\) \((> 0)\). This is done by extending the Matthews-Cox scaling in a one-dimensional system to higher dimensions.
Fujisaka, Hirokazu, Honkawa, Tomoaki, Yamada, Tomoji   +2 more
openaire   +2 more sources

Rheocasting versus Die Casting: An Insight into the Low‐Cycle Fatigue Behavior of AlSi7Mg0.6

Advanced Engineering Materials, EarlyView.
The study compares rheocast lightweight components with high‐pressure die cast materials regarding microstructure and fatigue behavior. Rheocast process offers higher efficiency due to lower casting temperatures. Despite some microstructural differences, both processes show similar strengths (yield strength 125 MPa, tensile strength 240 MPa).
Julia Richter, Thomas Wegener, Andreas Schilling, Martin Fehlbier, Thomas Niendorf   +4 more
wiley   +1 more source