Results 81 to 90 of about 1,543 (216)

Software Defined Radio Implementation of Carrier and Timing Synchronization for Distributed Arrays

open access: yes, 2018
The communication range of wireless networks can be greatly improved by using distributed beamforming from a set of independent radio nodes. One of the key challenges in establishing a beamformed communication link from separate radios is achieving ...
Balke, Kevin   +4 more
core   +1 more source

The continuing significance of chiral agrochemicals

open access: yesPest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Donor–Acceptor Pentacene Analogues With Near‐Infrared Emission and Tunable Aromaticity

open access: yesAngewandte Chemie, Volume 138, Issue 20, 11 May 2026.
Air‐ and photostable heterocyclic pentacene analogues with donor and acceptor groups flanking a para‐quinodimethane core exhibit large dipole moments, narrow bandgaps, reversible redox behavior, and NIR‐I to NIR‐II absorption and emission with pronounced solvatochromism.
Krzysztof Nowak   +6 more
wiley   +2 more sources

Modeling and Measurement of Image Sensor Characteristics [PDF]

open access: yes, 2004
The optical transfer function (OTF), as an objective measure of the quality of optical and electro-optical systems, is closely related to the point spread function (PSF) and other derived characteristics, such as the modulation transfer function (MTF ...
Fliegel, K.
core   +1 more source

Ionogel Actuators: A Review

open access: yesSmartBot, EarlyView.
Ionogels dynamically and functionally couple ionic liquids with polymer networks, enabling multiscale programmable deformation and motion under electrical, magnetic, optical, thermal, humidity, and chemical stimuli. This article systematically elucidates the constituent components, structural design, and multiscale actuation mechanisms of ionogel ...
Dezhou Cao   +5 more
wiley   +1 more source

Adaptive Optics for Astronomy

open access: yes, 2012
Adaptive Optics is a prime example of how progress in observational astronomy can be driven by technological developments. At many observatories it is now considered to be part of a standard instrumentation suite, enabling ground-based telescopes to ...
Arsenault R   +22 more
core   +1 more source

A New OTFS-Based Index Modulation System for 6G and Beyond: OTFS-Based Code Index Modulation

open access: yes2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
6 pages, 8 figures, 1 ...
Ozden, Burak Ahmet   +6 more
openaire   +3 more sources

Structural Ordering and Polarizable Al3+ Solvation Induced via Amphiphilic Zwitterion for Highly‐Reversible Zn–Al Alloy Anodes

open access: yesSmall, EarlyView.
An amphiphilic zwitterion of ZI‐10 is employed as an electrolyte additive to enhance the stability of Zn–Al alloy anodes, thereby constructing a dual‐layered electric double layer through the self‐assembly. The ZI‐10‐induced Al3+ solvation reduces charge transfer barriers, enabling over 2500 h of stable cycling and superior performance in full cells ...
Shengyang Huang   +11 more
wiley   +1 more source

Power allocation satisfying user fairness for integrated sensing and communication system based on orthogonal time frequency space modulation

open access: yesDianxin kexue, 2022
By sharing resources for radar sensing and communications, integrated sensing and communication (ISAC) has promising applications in diverse scenarios, such as human-machine interface, vehicle-to-everything (V2X), remote sensing, and environment ...
Ke XU, Luping XIANG, Jie HU, Kun YANG
doaj   +2 more sources

A Low-PAPR Pilot Design and Optimization for OTFS Modulation

open access: yesICC 2025 - IEEE International Conference on Communications
Orthogonal time frequency space (OTFS) modulation has been proposed recently as a new waveform in the context of doubly-selective multi-path channels. This article proposes a novel pilot design that improves OTFS spectral efficiency (SE) while reducing its peak-to-average power ratio (PAPR).
Bergamasco, Davide   +3 more
openaire   +4 more sources

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