Results 31 to 40 of about 1,830,826 (251)

Nonlinear properties of optically dense medium excited by multifrequency laser radiation

EPJ Web of Conferences, 2017
This work is devoted to nonlinear effects in the atomic medium excited by multifrequency laser radiation. We have considered collective light scattering in the optically dense medium in conditions of coherent population trapping. Propagation of intermode
Barantsev Konstantin, Litvinov Andrey, Popov Evgeniy   +2 more
doaj   +1 more source

Further Characterization of the Mitigation of Radiation Lethality by Protective Wounding

, 2017
There continues to be a major effort in the United States to develop mitigators for the treatment of mass casualties that received high-intensity acute ionizing radiation exposures from the detonation of an improvised nuclear device during a radiological
Joy Garrett, Katharina Lane, Marc S. Mendonca, Lane, Katharina, Garrett, Joy, Rebecca Joel, Joel, Rebecca, Orschell, Christie M., Christie M. Orschell, Mendonca, Marc S., Joseph R. Dynlacht, Dynlacht, Joseph R.   +11 more
core   +1 more source

Spatial and Volumetric Characteristics of Glioblastoma: Associations With Clinical Presentation and Survival

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective We aim to comprehensively analyze how regional tumor and edema characteristics are associated with clinical presentations and survival outcomes in a large cohort of glioblastoma patients. Methods Patients with IDH‐wildtype glioblastoma who received brain MRI from 2010 to 2023 were included.
Daniel J. Zhou, Marc Jaskir, Julian Gal, Yombe Fonkeu, Christos Davatzikos, MacLean P. Nasrallah, Jose Garcia, Rubo Xing, Stephen J. Bagley, Arati Desai, Richard E. Phillips, Steven Tobochnik, Colin A. Ellis, James J. Gugger, Nishant Sinha, Joel M. Stein, Kathryn A. Davis   +16 more
wiley   +1 more source

Application of FDTD Method in the Calculation of Lightning Propagation Effects on Mixed Terrain of Land and Sea

Information
Based on the finite-difference time-domain (FDTD) method, this study investigates the propagation effects of lightning electromagnetic fields over mixed sea–land paths.
Fang Xiao, Qiming Ma, Xiao Zhou, Jiajun Song, Jiaquan Wang, Linsen Jiang   +5 more
doaj   +1 more source

Predicting fan noise propagation in aeroengine bypass ducts

, 2009
This thesis explores the prediction of rearwards fan noise propagation within the bypass duct and its radiation into the far feld. Two recently developed models: B-induct and GXMunt, are exploited in application to real engine bypass ducts and their ...
McAleer, Claire Roisin
core   +2 more sources

Efficient computation of spinning modal radiation through an engine bypass duct

, 2008
The aim of this work is to accurately and efficiently predict sound radiation out of a duct with flow. The sound propagation inside a generic engine bypass duct, refractions by the shear layer of the exhaust flow, and propagation in the near field are ...
Zhang, Xin, Chen, Xiaoxian, Ma, Zhaokai, Huang, Xun   +3 more
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Nonparaxial propagation and the radiation forces of the chirped annular Bessel Gaussian beams

Results in Physics, 2020
We propose a new class of abruptly autofocusing beams, the chirped annular Bessel Gaussian beams (CABGBs), which are based on the radial Bessel profile.
Xiaolin Wu, Yuanqiang Peng, You Wu, Huixin Qiu, Kaihui Chen, Dongmei Deng, Xiangbo Yang   +6 more
doaj   +1 more source

Temporal prediction for spectrum environment maps with moving radiation sources

IET Communications, 2023
Spectrum resources are becoming harder to come by for wireless communications. The spectrum environment map (SEM), which depicts the electromagnetic environment's current state and future trend, is a valuable technique for managing and allocating ...
Yi Zhao, Qiuming Zhu, Zhipeng Lin, Lantu Guo, Qihui Wu, Jie Wang, Weizhi Zhong   +6 more
doaj   +1 more source

Controlled Excitation of Supermodes in a Multicore Fiber with a 5 × 5 Square Array of Strongly Coupled Cores

Photonics, 2021
Coherent propagation of supermodes in a multicore fiber is promising for power scaling of fiber laser systems, eliminating the need for the active feedback system to maintain the phases between the channels. We studied the propagation of broadband pulsed
Nikolay A. Kalinin, Elena A. Anashkina, Olga N. Egorova, Sergey G. Zhuravlev, Sergei L. Semjonov, Arkady V. Kim, Alexander G. Litvak, Alexey V. Andrianov   +7 more
doaj   +1 more source