Results 11 to 20 of about 337,169 (269)

The accelerated acceleration of the universe

Journal of Cosmology and Astroparticle Physics, 2006
We present a simple mechanism which can mimic dark energy with an equation of state w < -1 as deduced from the supernova data. We imagine that the universe is accelerating under the control of a quintessence field, which is moving up a very gently sloping potential.
Csaki, Csaba, Kaloper, Nemanja, Terning, John   +2 more
openaire   +2 more sources

FDTD ANALYSIS OF NONLINEAR MAGNETIZED FERRITES: APPLICATION TO MODELING OF OSCILLATION FORMING IN COAXIAL LINE WITH FERRITE [PDF]

Радиофизика и электроника, 2017
In recent years, the high-voltage pulse devices using nonlinear properties of ferrite have received more attention. For the analysis of this kind of objects, the 2D numerical modeling technology of nonlinear saturated ferrites by FDTD method has been ...
S. Yu. Karelin
doaj   +1 more source

Acceleration of Material Waves in Fermi Accelerator [PDF]

Mathematical Problems in Engineering, 2009
Cold Atoms bouncing on modulated atomic mirror exhibits acceleration and dynamical localization subject to modulated strength. We explain characteristics of acceleration and define control parameters in terms of effective Planck′s constant. We show that the effective Planck′s constant plays a vital role in limiting classical‐like overall linear growth
Akram, Javed, Naseer, Khalid, Rehman, Inam-Ur, Saif, Farhan   +3 more
openaire   +2 more sources

Measurements of plasma density profile evolutions with a channel-guided laser

High Power Laser Science and Engineering, 2023
The discharged capillary plasma channel has been extensively studied as a high-gradient particle acceleration and transmission medium. A novel measurement method of plasma channel density profiles has been employed, where the role of plasma channels ...
Tong Yang, Zhen Guo, Yang Yan, Minjian Wu, Yadong Xia, Qiangyou He, Hao Cheng, Yuze Li, Yanlv Fang, Yanying Zhao, Xueqing Yan, Chen Lin   +11 more
doaj   +1 more source

MAXIMAL ACCELERATION OR MAXIMAL ACCELERATIONS? [PDF]

International Journal of Modern Physics D, 2003
We review the arguments supporting the existence of a maximal acceleration for a massive particle and show that different values of this upper limit can be predicted in different physical situations.
openaire   +2 more sources

2.3 J, 25 Hz Nd:YAG/sapphire composite powerchip amplifier operating at room temperature [PDF]

EPJ Web of Conferences
We demonstrate a sub-nanosecond Joule-class room-temperature diode-pumped solid-state chip laser comprising of periodically bonded Nd:YAG and sapphire crystal plates and operating at 25 Hz, delivering the peak power over 3 GW.
Kausas Arvydas, Yahia Vincent, Odaka Hideho, Yoshida Mitsuhiro, Taira Takunori   +4 more
doaj   +1 more source

Discussion on Rayleigh equation obtained for a Hall thruster plasma with dust

Journal of Theoretical and Applied Physics, 2018
The present study focuses on the Rayleigh equation derived in the case of a Hall thruster plasma having dust contamination, produced near the exit of the channel due to the finite divergence of the accelerated ions and the sputtering of the walls. In the
Jasvendra Tyagi, Dimple Sharma, Hitendra K. Malik   +2 more
doaj   +1 more source

Identifying spin bias of nonsignificant findings in biomedical studies

BMC Research Notes, 2023
Objective The purpose of this research note is to share a technique for the identification of spin bias that we developed as part of a living systematic review on the cardiovascular testing of e-cigarette substitution for cigarette smoking.
Renée O’Leary, Giusy Rita Maria La Rosa, Robin Vernooij, Riccardo Polosa   +3 more
doaj   +1 more source

Resonant third harmonic generation of super-Gaussian laser beam in a rippled density plasma

Journal of Theoretical and Applied Physics, 2018
Resonant third harmonic generation of super-Gaussian laser beam in rippled density plasma is studied. Both the relativistic and ponderomotive nonlinearities are included in the analysis, and the study is done for self-guided laser beam.
Lalita Devi, Hitendra K. Malik
doaj   +1 more source

An Infrared Non-Invasive System for Measuring Blood Glucose: A Primary Study using Serum Samples [PDF]

Journal of Biomedical Physics and Engineering
Background: Diabetes is a global concern, with an estimated 2 million individuals expected to be affected by the condition by 2024. Non-invasive glucose monitoring devices can greatly enhance patient care and management.Objective: This study aimed to ...
Ramin Jokari, Zahra Mahyari, Mohammad Javad Moulodi, Seyyed Mohammad Fatemi Ghiri, Hadi Tajalizadeh, Ali Loloee Jahromi, Alireza Nakhostin, Gholamreza Abdollahifard, Hossein Parsaei   +8 more
doaj   +1 more source