Results 91 to 100 of about 416,141 (287)

Electromagnetic radiation

, 2012
The aim of this tutorial is to convey the basic properties of electromagnetic radiation: these concepts are essential for understanding Sections 4, 5, 6, and 7 in this book. Electromagnetic waves James Clerk Maxwell (1831-1879) combined the laws of electricity and magnetism with those...
openaire   +2 more sources

Fano resonances in antennas: General control over radiation patterns

, 2013
The concepts of many optical devices are based on the fundamental physical phenomena such as resonances. One of the commonly used devices is an electromagnetic antenna that converts localized energy into freely propagating radiation and vise versa ...
Belov, Pavel A., Filonov, Dmitry S., Kapitanova, Polina V., Kivshar, Yuri S., Limonov, Mikhail F., Rybin, Mikhail V., Slobozhanyuk, Alexey P.   +6 more
core   +1 more source

Real‐Time 3D Ultrasound Imaging with an Ultra‐Sparse, Low Power Architecture

Advanced Healthcare Materials, EarlyView.
This article presents a novel, ultra‐sparse ultrasound architecture that paves the way for wearable real‐time 3D imaging. By integrating a unique convolutional array with chirped data acquisition, the system achieves high‐resolution volumetric scans at a fraction of the power and hardware complexity.
Colin Marcus, Md Osman Goni Nayeem, Aastha Shah, Jason Hou, Shrihari Viswanath, Maya Eusebio, David Sadat, Anantha P. Chandrakasan, Tolga Ozmen, Canan Dagdeviren   +9 more
wiley   +1 more source

Out-of-equilibrium electromagnetic radiation

, 2003
We derive general formulas for photon and dilepton production rates from an arbitrary non-equilibrated medium from first principles in quantum field theory.
A. Niegawa, B. Alessandro ., C. Gale, C. Greiner, C.T. Traxler, D. Bohm, D. Boyanovsky, D. Boyanovsky, D. Boyanovsky, D.W. McKay, E.L. Feinberg, F. Arleo ., G. Aarts, G. Aarts, J. Berges, J. Berges, J. Kapusta, J. Kapusta, J.M. Cornwall, J.S. Schwinger, Julien Serreau, K. Kajantie, K. Rajagopal, L.D. McLerran, L.V. Keldysh, M. Le Bellac, M.E. Carrington, M.E. Carrington, M.G. Mustafa, M.G. Mustafa, P. Arnold, P. Aurenche, P. Aurenche, P.F. Kolb, R. Baier, R. Baier, R. Baier, S.M.H. Wong, T.S. Biró   +38 more
core   +1 more source

Nanotherapies for Atherosclerosis: Targeting, Catalysis, and Energy Transduction

Advanced Healthcare Materials, EarlyView.
Atherosclerosis management is hindered by poor drug targeting and plaque heterogeneity. Nanotechnology overcomes these barriers via three core strategies: (1) target‐engineered nanocarriers that achieve lesion‐specific precision via ligand modification, biomimetic camouflage, stimuli‐responsive release, and self‐propelling nanomotors; (2) catalytic ...
Yuqi Yang, Jingguo Qu, Tonghuan Xiao, Xinyang Han, Michael Tin‐Cheung Ying   +4 more
wiley   +1 more source

Electromagnetic radiation produces frame dragging

, 2012
It is shown that for a generic electrovacuum spacetime, electromagnetic radiation produces vorticity of worldlines of observers in a Bondi--Sachs frame.
G. Ghisellini, K. S. Thorne, L. Bel, L. Bel, L. Herrera, R. P. Feynman, W. Barreto, W. B. Bonnor, W. B. Bonnor   +8 more
core   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

DEVELOPMENT OF EXTREMELY LOW FREQUENCY PASSIVE SHIELDING APPLICATION USING MAGNETIC AQUEOUS SUBSTRATE [PDF]

Journal of Engineering Science and Technology, 2016
Public concerns on Extremely Low Frequency (ELF) Electromagnetic Field (EMF) exposure have been elongated since the last few decades. Electrical substations and high tension rooms in commercial buildings were among the contributing factors emanating ELF ...
NOOR ASHIKIN MOHD RASHID, WAN NOR LIZA MAHADI, SHARIFAH NADHIRAH SYED ZIN   +2 more
doaj  

Novel Time-domain Ultra-wide Band TEM Horn Antenna for Highway GPR Applications

Leida xuebao, 2017
Based on transmission line theory and impedance transition, we design an ultra-wideband Transverse ElectroMagnetic (TEM) horn antenna that takes advantage of index gradient structure and loading techniques and is optimized for highway Ground Penetrating ...
Yin De, Ye Shengbo, Liu Jinwei, Ji Yicai, Liu Xiaojun, Fang Guangyou   +5 more
doaj   +1 more source

A statistical model for the excitation of cavities through apertures

, 2015
In this paper, a statistical model for the coupling of electromagnetic radiation into enclosures through apertures is presented. The model gives a unified picture bridging deterministic theories of aperture radiation, and statistical models necessary for
Anlage, Steven M., Antonsen, Thomas M., Gradoni, Gabriele, Ott, Edward   +3 more
core   +1 more source