Results 41 to 50 of about 7,833,698 (252)

ARCHITECTURE OF ELECTRONIC COMMUNICATIONS

open access: yesІнформаційні технології і засоби навчання, 2010
The research objective is to analyze the major principles of IT-systems design and development and operation within the structure of the integrated architecture of electronic communications within the government authorities of Ukraine and to introduce ...
Oleksandr M. Shevtsov
doaj  

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

open access: yesAdvanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son   +20 more
wiley   +1 more source

Pipeline analog-to-digital converters for wide-band wireless communications [PDF]

open access: yes, 2002
During the last decade, the development of the analog electronics has been dictated by the enormous growth of the wireless communications. Typical for the new communication standards has been an evolution towards higher data rates, which allows more ...
Sumanen, Lauri
core   +1 more source

DiffNet: A Learning to Compare Deep Network for Product Recognition

open access: yesIEEE Access, 2020
The paper focuses on the identification of different objects in a pair of images taken from the same environment, which is challenging and has wide application. We propose a single deep convolutional neural network termed as DiffNet to solve this problem.
Bin Hu   +4 more
doaj   +1 more source

Fiber Optic Gas Sensors Based on Lossy Mode Resonances and Sensing Materials Used Therefor: A Comprehensive Review

open access: yesSensors, 2021
Pollution in cities induces harmful effects on human health, which continuously increases the global demand of gas sensors for air quality control and monitoring.
Ignacio Vitoria   +3 more
doaj   +1 more source

n‐Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz

open access: yesAdvanced Materials, EarlyView.
Combining an n‐doped polymer semiconductor with wafer‐scale asymmetric planar electrodes featuring work function‐engineered contacts yields radio‐frequency diodes and rectifying circuits operating at up to 18.5 GHz. The devices combine scalable manufacturing with an operating frequency previously unattainable by large‐area organic electronics ...
Lazaros Panagiotidis   +19 more
wiley   +1 more source

Towards QoS-Aware Load Balancing for High Density Software Defined Wi-Fi Networks

open access: yesIEEE Access, 2020
High density Wi-Fi networks require load balancing in order to ensure quality of service (QoS). In the traditional Wi-Fi networks, the wireless stations learn the access points (APs) load and make the association decisions themselves leading to uneven ...
Sohaib Manzoor   +4 more
doaj   +1 more source

Ti3C2Tx MXene/Silver Composite Foams For Lightweight, High‐Performance Electromagnetic Interference Shielding and Joule Heating

open access: yesAdvanced Materials Interfaces, EarlyView.
Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood   +7 more
wiley   +1 more source

Constant-Current Gate Driver for GaN HEMTs Applied to Resonant Power Conversion

open access: yesEnergies, 2021
New semiconductor technology is enabling the design of more reliable and high-performance power converters. In particular, wide bandgap (WBG) silicon carbide (SiC) and gallium nitride (GaN) technologies provide faster switching times, higher operating ...
Héctor Sarnago   +3 more
doaj   +1 more source

Electronic Communications as a Distinct and Unique Object of Regulation [PDF]

open access: yes, 2009
The present paper is an abridged version of the first chapter to the book EC Electronic Communications and Competition Law (London: Cameron May, 2007). It is intended to pinpoint the contours of the communications sector as an object of regulation - an ...
Burri, Mira
core  

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