Results 41 to 50 of about 101,930 (233)

Stability of Synchronous Queued RFID Networks

IEEE Access, 2019
Queued Radio Frequency Identification (RFID) networks arise naturally in many applications, where tags are grouped into batches, and each batch must be processed before the next reading job starts.
Javier Vales-Alonso, Pablo Lopez-Matencio, Juan J. Alcaraz, Francisco Javier Gonzalez-Castano   +3 more
doaj   +1 more source

Investigation of Accuracy of TOA and SNR of Radio Pulsar Signals for Vehicles Navigation

Sensors, 2023
It is known that X-ray and gamma-ray pulsars can only be observed by spacecraft because signals from these pulsars are impossible to be detected on the Earth’s surface due to their strong absorption by the Earth’s atmosphere.
Hristo Kabakchiev, Vera Behar, Dorina Kabakchieva, Valentin Kisimov, Kamelia Stefanova   +4 more
doaj   +1 more source

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

Path Loss Characterization at the 1800 and 2100 MHz Frequency Bands in Citrus Plantations

IEEE Access
Agriculture 4.0 is revolutionizing crop production by leveraging advanced sensor networks and wireless technologies, with efficiently planned radio communication systems serving as a key component.
Ricardo Robles-Enciso, Leandro Juan-Llacer, Jose-Maria Molina-Garcia-Pardo, Jose-Victor Rodriguez   +3 more
doaj   +1 more source

Time-Periodic Metallic Metamaterials Defined by Floquet Circuits

IEEE Access, 2023
In this paper, we study the scattering and diffraction phenomena in time-modulated metamaterials of metallic nature by means of Floquet equivalent circuits. Concretely, we focus on a time-periodic screen that alternates between “metal” and &
Salvador Moreno-Rodriguez, Antonio Alex-Amor, Pablo Padilla, Juan F. Valenzuela-Valdes, Carlos Molero   +4 more
doaj   +1 more source

Meniscus Pixel Printing for Contact‐Lens Vision Sensing and Robotic Control

Advanced Functional Materials, EarlyView.
A visual‐sensing contact lens is enabled by meniscus pixel printing (MPP), which rapidly patterns a 200 µm perovskite photodetector pixel in 1 s without masks, vacuum processing, or bulky equipment. A deep‐learning‐based super‐resolution reconstructs sparse on‐lens signals into 80 × 80 high‐resolution visual information, while AI‐driven eye‐tracking ...
Byung‐Hoon Gong, Dohyean Kim, Jiyun Jeong, Taekyeong Kim, Soon‐sung Kwon, Junyoung Seo, Il Jeon, Im Doo Jung   +7 more
wiley   +1 more source

Time Aware F-Score for Cybersecurity Early Detection Evaluation

Applied Sciences
With the increase in the use of Internet interconnected systems, security has become of utmost importance. One key element to guarantee an adequate level of security is being able to detect the threat as soon as possible, decreasing the risk of ...
Manuel López-Vizcaíno, Francisco J. Nóvoa, Diego Fernández, Fidel Cacheda   +3 more
doaj   +1 more source

Multifunctional Material Structures Based on Laser-Etched Carbon Nanotube Arrays

Micromachines, 2014
High-power electronics in the transportation and aerospace sectors need size and weight reduction. Multifunctional and multistructured materials are currently being developed to couple electromagnetic (EM) and thermal properties, i.e., shielding against ...
Aline Emplit, Ester Tooten, Victor Xhurdebise, Isabelle Huynen   +3 more
doaj   +1 more source

Dispensing Volumetric Additive Manufacturing

Advanced Functional Materials, EarlyView.
Dispensing volumetric additive manufacturing (DVAM) prints 3D structures inside a photocurable resin droplet suspended from the tip of a glass pipette, enabling sequential printing without resin vats or manual part removal. Real‐time droplet profiling and ray‐tracing‐based correction compensate for optical distortion at the curved resin‐air interface ...
Hongryung Jeon, Yunsoo Lee, Seobin Park, Kyung‐Hwan Kim, Junyoung Seo, Im Doo Jung   +5 more
wiley   +1 more source

Skin‐Interfaced Therapeutic Patches for Wound Fluid Management and Transdermal Drug Delivery

Advanced Healthcare Materials, EarlyView.
This study presents an integrated skin‐interfaced device combining microfluidics, hydrogel film technology, flexible electronics, and iontophoresis‐based transdermal delivery of PDRN to enhance wound healing. The device effectively manages wound fluid, maintains optimal moisture, and non‐invasively delivers therapeutic drugs.
Dongjun Han, Donghyun Kim, Haram Lee, Dong‐Wook Park, Sung Soo Kwak, Joohee Kim   +5 more
wiley   +1 more source