Results 251 to 260 of about 13,209,149 (311)

Unified Far-Field and Near-Field in Holographic MIMO: A Wavenumber-Domain Perspective

IEEE Communications Magazine
This article conceives a unified representation for near-field and far-field holographic multiple-input multiple-output (HMIMO) channels, addressing a practical design dilemma: “Why does the angular-domain representation no longer function effectively ...
Yuanbin Chen, Xufeng Guo, Gui Zhou, Shi Jin, Derrick Wing Kwan Ng, Zhaocheng Wang   +5 more
semanticscholar   +1 more source

Far Field EM Side-Channel Attack on AES Using Deep Learning

IACR Cryptology ePrint Archive, 2020
We present the first deep learning-based side-channel attack on AES-128 using far field electromagnetic emissions as a side channel. Our neural networks are trained on traces captured from five different Bluetooth devices at five different distances to ...
Ruize Wang, Huanyu Wang, E. Dubrova
semanticscholar   +1 more source

Far-Field Optical Superlens

Nano Letters, 2007
Far-field optical lens resolution is fundamentally limited by diffraction, which typically is about half of the wavelength. This is due to the evanescent waves carrying small scale information from an object that fades away in the far field. A recently proposed superlens theory offers a new approach by surface excitation at the negative index medium ...
Zhaowei, Liu, Stéphane, Durant, Hyesog, Lee, Yuri, Pikus, Nicolas, Fang, Yi, Xiong, Cheng, Sun, Xiang, Zhang   +7 more
openaire   +2 more sources

Modeling of rheological fracture behavior of rock cracks subjected to hydraulic pressure and far field stresses

Theoretical and applied fracture mechanics (Print), 2019
Mathematical modelling of rheological fracture of rock cracks under the combined effect of hydraulic pressure and far field stresses has not been fully studied so far.
Yanlin Zhao, Yixian Wang, Weijun Wang, Liming Tang, Qiang Liu, G. Cheng   +5 more
semanticscholar   +1 more source

Far field of polarization gratings

Optics Letters, 1999
In a recent Letter [Opt. Lett. 24, 584 (1999)], Gori analyzed polarization gratings and proposed using them as a tool to measure Stokes parameters. Most of his analysis dealt with the near field, but practical exploitation of his approach relies on the far field.
openaire   +2 more sources

Seismic Fragility Analysis of Base-Isolated Building Frames Excited by Near- and Far-Field Earthquakes

Journal of performance of constructed facilities, 2019
The present study aims at the probabilistic seismic risk assessment of a base-isolated building frame under near- and far-field earthquakes by conducting a fragility analysis.
M. Bhandari, S. D. Bharti, M. Shrimali, T. K. Datta   +3 more
semanticscholar   +1 more source

Localization of Mixed Near-Field and Far-Field Sources Using Symmetric Double-Nested Arrays

IEEE Transactions on Antennas and Propagation, 2019
Nested arrays have recently attracted a growing concern owing to their ability of achieving extended aperture and enhanced degrees of freedom (DOFs) compared to conventional uniform linear arrays (ULAs).
Zhi Zheng, Mingcheng Fu, Wen-qin Wang, Shunsheng Zhang, Y. Liao   +4 more
semanticscholar   +1 more source

Into the Far Field

2007
In asking you, the reader, to metaphorically Step into “Heidegger’s Shoes” I am suggesting that the provisional “truth” of the equipmentality of this text be allowed to fall away to reveal an other-place. The interpretation of the text becomes yours. The collective action of both I, as author, and you, as reader, merely presents the start of a process ...
openaire   +1 more source

A Selective, Tracking, and Power Adaptive Far-Field Wireless Power Transfer System

IEEE transactions on microwave theory and techniques, 2019
This paper proposes a selective, tracking, and power adaptive far-field wireless power transfer (WPT) system that may be integrated into passive wireless sensor networks (PWSNs). Both transmitter and receiving nodes are developed with features that allow
D. Belo, D. Ribeiro, P. Pinho, N. Borges Carvalho   +3 more
semanticscholar   +1 more source

Tolerance on defocus precisely locates the far field (exactly where is that far field anyway?)

Applied Optics, 2002
The Fraunhofer criterion defines the location of the boundary between the Fresnel and the Fraunhofer diffraction regions and thus determines the location of that region commonly referred to as the far field. The Fraunhofer criterion is usually given as an axial distance much greater than some amount relative to the maximum dimension of the aperture. By
Harvey, James E., Krywonos, Andrey, Bogunovic, Dijana   +2 more
openaire   +5 more sources