Results 41 to 50 of about 25,641,075 (274)

Enhancement of Subcooled Flow Boiling Heat Transfer with High Porosity Sintered Fiber Metal

open access: yesApplied Sciences, 2021
We conducted experimental research using high-porosity sintered fiber attached on the surface, as a passive method to increase the heat flux for subcooled flow boiling.
Yusuke Otomo   +2 more
doaj   +1 more source

Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities [PDF]

open access: yesIEEE Transactions on Cognitive Communications and Networking, 2020
Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.
Mohamed A. Elmossallamy   +5 more
semanticscholar   +1 more source

Bayesian compressive sensing framework for spectrum reconstruction in Rayleigh fading channels [PDF]

open access: yes, 2016
Compressive sensing (CS) is a novel digital signal processing technique that has found great interest in many applications including communication theory and wireless communications.
Ghafoor, Abdul   +3 more
core   +1 more source

Fast Single-Mode Fiber Nonlinearity Monitoring: An Experimental Comparison Between Split-Step and Nonlinear Fourier Transform-Based Methods

open access: yesIEEE Photonics Journal, 2023
We experimentally investigate the problem of monitoring the Kerr-nonlinearity coefficient $\gamma$ from transmitted and received data for a single-mode fiber link of 1600 km length. We compare the accuracy and speed of three different approaches.
Pascal de Koster   +4 more
doaj   +1 more source

Design of Satellite Operations Subsystem Using Dynamic Fault Management Mechanism [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
Satellite Operations Subsystem in the Mission Control Element provides real-time monitoring of the satellite status and transmits telecommands to control the satellite during the contact time.
Jaehoon Kim, Heesook Mo, Woonchan Jung
doaj  

Analytical Study on Mission Control Element System Availability for Korea Multipurpose Satellite (KOMPSAT) I [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
To estimate the availability of the MCE for KOMPSAT I, mathematical models of H/W and S/W availability, the availability estimating methods for parallel and redundant system were presented. Furthermore, to improve and estimate the MCE system availability,
J. W. Eun, D. I. Chang, J. M. Kim
doaj  

DNN-Based Map Deviation Detection in LiDAR Point Clouds

open access: yesIEEE Open Journal of Intelligent Transportation Systems, 2023
In this work we present a novel deep learning-based approach to detect and specify map deviations in erroneous or outdated high-definition (HD) maps using both sensor and map data as input to a deep neural network (DNN).
Christopher Plachetka   +4 more
doaj   +1 more source

A Security Credential Management System for V2X Communications [PDF]

open access: yesIEEE transactions on intelligent transportation systems (Print), 2018
The U.S. Department of Transportation (USDOT) issued a proposed rule on January 12, 2017 to mandate vehicle-to-vehicle safety communications in light vehicles in the U.S. Cybersecurity and privacy are major challenges for such a deployment.
Benedikt Brecht   +6 more
semanticscholar   +1 more source

Smart hospital emergency system via mobile-based requesting services [PDF]

open access: yes, 2019
In recent years, the UK’s emergency call and response has shown elements of great strain as of today. The strain on emergency call systems estimated by a 9 million calls (including both landline and mobile) made in 2014 alone.
Al-Khafajiy, Mohammed   +4 more
core   +1 more source

Significantly High Modulation Efficiency of Compact Graphene Modulator Based on Silicon Waveguide

open access: yesScientific Reports, 2018
We theoretically and experimentally demonstrate a significantly large modulation efficiency of a compact graphene modulator based on a silicon waveguide using the electro refractive effect of graphene.
Haowen Shu   +6 more
doaj   +1 more source

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