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RIS-Assisted Green Secure Communications: Active RIS or Passive RIS?

IEEE Wireless Communications Letters, 2023
Reconfigurable Intelligent Surface (RIS) is one of the promising techniques for 6G wireless communications, and recently has also been shown to be able to improve secure communications. However, there is a "double fading" effect in the reflection link between base station and user, thus passive RIS only achieves a negligible secrecy gain in typical ...
Weigang Lv, Jiale Bai, Qingli Yan
exaly   +3 more sources

Monitoring of environmental gases and calf health in Italian Mediterranean buffalo herd

Revista Científica, 2023
In buffalo breeding, calves require special attention and housing systems that provide thermal comfort, good air quality, brightness, and adequate space.
Simona Leonetti , Monica Ambrosio , Mirko Scamardella , Chiara Caso , Angelo Coletta   +4 more
doaj   +1 more source

Research on the Rate of Devices-to-Devices Communication System based on Reconfigurable Intelligent Surface

Guangtongxin yanjiu, 2022
There are problems of interference between Devices-to-Devices (D2D) communication users and cellular users, mutual interference between D2D communication users, and environmental interference caused by the existence of environmental obstacles in the D2D ...
Feng-ting FU, Li LI, Jing ZHANG
doaj   +1 more source

A silver bullet? The role of radiology information system data mining in defining gunshot injury trends at a South African tertiary-level hospital

South African Journal of Radiology, 2021
Background: South Africa (SA) has no national injury surveillance system, and hence, non-fatal gunshot injuries are not routinely recorded. Most firearm-related injuries require multi-detector computer tomography (MDCT) assessment at a tertiary-level ...
Dale K. Creamer, Asif Bagadia, Clive Daniels, Richard D. Pitcher   +3 more
doaj   +1 more source

Postintensjonal moralsk vilkårlighet

Norsk Filosofisk Tidsskrift, 2020
Sammendrag Jeg har kalt artikkelen «Postintensjonal moralsk vilkårlighet». Tematikken står sentralt i en rekke filosofiske artikler på engelsk, sentrert omkring begrepet «moral luck».
Erik Brown
doaj   +1 more source

Robertson Intelligent States [PDF]

, 1997
Diagonalization of uncertainty matrix and minimization of Robertson inequality for n observables are considered. It is proved that for even n this relation is minimized in states which are eigenstates of n/2 independent complex linear combinations of the
Abramowitz M, Agarwal G S, Aragone C, Barut A O, Barut A O, Biedenharn L C, Bogdanovic R, Brif C, Brif C, D A Trifonov, Dodonov V V, Dodonov V V, Gantmaher F R, Hach E E III, Hillery M, Holz A, Klauder J R, Klauder J R, Loudon R, Lu E Y C, Ma X, Macfarlane A J, Malkin I A, Malkin I A, Man'ko Olga, Man'ko V I, Naimark M A, Nikolov B A, Oh C H, Provost J, Schrödinger E, Simon R, Sudarshan E C G, Trifonov D A, Trifonov D A, Trifonov D A, Walls D F, Wünsche A   +37 more
core   +3 more sources

Space Shift Keying With Reconfigurable Intelligent Surfaces: Phase Configuration Designs and Performance Analysis

IEEE Open Journal of the Communications Society, 2021
Reconfigurable intelligent surface (RIS)-assisted transmission and space shift keying (SSK) appear as promising candidates for future energy-efficient wireless systems.
Qiang Li, Miaowen Wen, Shuai Wang, George C. Alexandropoulos, Yik-Chung Wu   +4 more
doaj   +1 more source

Reconfigurable Intelligent Surface Enabled Spatial Modulation for Visible Light Communications

IEEE Photonics Journal, 2023
An important issue in visible light communications (VLC) is how to boost up the system throughput even when the line-of-sight (LOS) link is blocked by obstacles. In this paper, we propose reconfigurable intelligent surface (RIS) based spatial modulation (
Pengfei Shen, Lu Lu
doaj   +1 more source

Frequency Stability of Power System with Large Share of Wind Power Under Storm Conditions

Journal of Modern Power Systems and Clean Energy, 2020
The operation of transmission systems with large share of wind power is specially challenging under storm conditions. Under the stormy wind speed conditions, wind turbine protection system is designed to shut down the turbine to avoid excessive ...
Kaushik Das, Feng Guo, Edgar Nuno, Nicolaos A. Cutululis   +3 more
doaj   +1 more source

STAR-RIS-UAV-Aided Coordinated Multipoint Cellular System for Multi-User Networks

Drones, 2023
Different from conventional reconfigurable intelligent surfaces (RIS), simultaneous transmitting and reflecting RIS (STAR-RIS) can reflect and transmit signals to the receiver. In this paper, to serve more ground users and increase deployment flexibility,
Baihua Shi, Yang Wang, Danqi Li, Wenlong Cai, Jinyong Lin, Shuo Zhang, Weiping Shi, Shihao Yan , Feng Shu   +8 more
doaj   +1 more source