Results 21 to 30 of about 31,839 (188)

Численное решение задачи фильтрации оценок информационного воздействия на электорат

open access: yesИнформатика и автоматизация, 2022
В статье предложены постановка и численная схема решения задачи фильтрации оценок информационного воздействия средств масс-медиа на электорат, позволяющие с высокой степенью точности на заданном интервале наблюдения определить число индивидов в обществе,
Kirill Loginov
doaj   +1 more source

Introduction of the Pelleted Smallpox Vaccine TEOVak into Serial Production to Provide Biosafety of the Population of the Russian Federation

open access: yesПроблемы особо опасных инфекций, 2010
The industrial basis was developed and licensed to produce effective pelleted oral smallpox vaccine TEOVak in the Virologic Centre. Several series of TEOVak preparation were produced in accordance with the industrial technology on a built-in processing ...
V. P. Bondarev   +3 more
doaj   +1 more source

Performance Analysis of UAV-Assisted Hybrid FSO/RF Communication Systems under Various Weather Conditions

open access: yesSensors, 2023
Nowadays, unmanned aerial vehicle (UAV) communication systems are commonly considered as one of the key enabling technologies for 6G. The hybrid free space optical (FSO)/radio frequency (RF) system has the advantages of both FSO and RF links to improve ...
Yan Wu, Dejin Kong, Qian Wang, Gang Li
doaj   +1 more source

Ergodic Capacity Analysis of Satellite Communication Systems With SAG-FSO/SH-FSO/RF Transmission

open access: yesIEEE Photonics Journal, 2022
Future non-terrestrial networks aim to achieve a throughput of Terabits/s. Therefore, free-space optical (FSO) communications have been adopted as a candidate solution due to their ability to achieve an extremely high data rate.
Ramy Samy   +3 more
doaj   +1 more source

Effects of Atmospheric Turbulence on Optical Wireless Communication in NEOM Smart City

open access: yesPhotonics, 2022
The foundation of any smart city requires an innovative and robust communication infrastructure. Many research communities envision free-space optical communication (FSO) as a promising backbone technology for the services and applications provided by ...
Ayshah S. Alatawi   +4 more
doaj   +1 more source

Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence [PDF]

open access: yes, 2010
This paper reports experimental results for the performance of an free space optical (FSO) communication link employing different modulation schemes under the influence of the atmospheric scintillation.
Adebanjo, Olusegun   +6 more
core   +1 more source

Availability analysis of terrestrial free space optical (FSO) link using visibility data measured in tropical region [PDF]

open access: yes, 2018
Haze and rain are the most impairments factors to free space optical (FSO) links. These weather conditions limit the visibility, and thereby causes high attenuation of the optical signal.
Abdullah, M. F. L.   +2 more
core   +1 more source

Performances Study of PSK and ASK Modulation Technique under Atmospheric Turbulence in FSO Communication System [PDF]

open access: yesEngineering and Technology Journal
The performance and reliability of a free-space optical (FSO) communication system can be greatly increased using various methods. The primary goal of each technique is to reduce the effect of disturbances that lead to intensity or phase fluctuations in ...
Esraa Al – Gazzi   +2 more
doaj   +1 more source

Quantize and Encode Relaying Through FSO and Hybrid FSO/RF Links

open access: yesIEEE Transactions on Vehicular Technology, 2015
A relaying scheme that uses both radio frequency (RF) and free space optical (FSO) links is investigated. In the proposed quantize and encode relaying (QER), a mobile source broadcasts the RF signal using quadrature amplitude modulation (QAM). The relay estimates and quantizes the log-likelihood ratio (LLR) of each received bit in the symbol and ...
Kuldeep Kumar, Deva K. Borah
openaire   +1 more source

Optimal Multiple FSO Transceiver Configuration for Using on High-Altitude Platforms

open access: yesIEEE Access, 2023
Free-space optical (FSO) communication requires light of sight (LoS) between the transmitter and the receiver. For long-distance communication, many research projects have been conducted towards using a network composed of high-altitude platforms (HAPs ...
Dieu Linh Truong, The Ngoc Dang
doaj   +1 more source

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