Results 111 to 120 of about 22,763 (260)

Electrically Responsive Structural‐Color Materials

open access: yesAggregate, Volume 7, Issue 7, July 2026.
This review highlights electrically responsive structural‐color materials as next‐generation electrochromic platforms, summarizing key structural designs, modulation mechanisms, and performance metrics to enable continuous, low‐voltage, and tailorable color tuning for advanced display, camouflage, and security applications.
Qiming Wang   +4 more
wiley   +1 more source

Spectral analysis of stratified sampling: a means to perform efficient multiband spectrum sensing

open access: yes, 2012
This paper introduces a multiband spectrum sensing technique that utilizes nonuniform stratified sampling. Capitalising on the ability of the sampling scheme to suppress aliasing, the proposed method accomplishes the sensing task using sampling rates ...
Tarczynski, A., Ahmad, B.I.
core   +1 more source

Improved Gain of a Compact Slot Antenna using an FSS Reflector for GNSS L1/E1/B1/G1 bands [PDF]

open access: yesRadioengineering
In this paper, a compact stepped slot antenna, for Global Navigation Satellite System (GNSS) applications, is proposed. The latter one, which operates in the frequency range from 1.49 GHz to 1.66 GHz, is designed to cover five GNSS bands namely GPS-L1 ...
A. Boularas   +3 more
doaj  

Motion‐Compensated Diffusion Imaging With Phase‐Contrast for Robust Quantification of Regional Cerebral Blood Flow

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 1, Page 238-246, July 2026.
ABSTRACT Purpose To develop and evaluate a motion‐compensated diffusion imaging with phase‐contrast (MC‐DIP) technique for mitigating errors in regional cerebral blood flow (rCBF) quantification caused by physiological brain motion. Methods Diffusion‐weighted images were acquired in 11 healthy volunteers on a 3.0 T MRI system using three gradient ...
Naoki Ohno   +6 more
wiley   +1 more source

Multiband Antennas Design Techniques for 5G Networks: Present and Future Research Directions

open access: yes, 2018
With the development of wireless communication system has demanded compact wireless devices that allow more space to integrate the other electronics components.
Vibha Rajnag
core  

Assessing Measurement Repeatability of a Novel Anisotropic Phantom for Advanced Diffusion MRI Models

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 1, Page 339-348, July 2026.
ABSTRACT Purpose Diffusion MRI is widely used to characterize tissue microstructure, but standardization remains challenging, particularly for advanced models or regions with crossing fibers. Phantoms provide controlled environments to assess measurement repeatability independent of biological variability.
Lauren Stephens   +3 more
wiley   +1 more source

A reconfigurable CPW antenna for GPS, GSM and WLAN applications

open access: yes, 2010
Copyright @ 2011 IEEEMultiband reconfigurable antennas are receiving increasing importance in modern wireless communication systems supporting multiservice applications.
AbuTarboush, HF   +4 more
core  

A Novel Reconfigurable Gate-Biasing Technique for Extending Dynamic Range in CMOS RF-DC Rectifiers Targeting RFEH Applications

open access: yesChips
This paper presents a novel fully integrated radio frequency (RF) rectifier tailored for a wide power dynamic range (PDR) with multiband adaptability to efficiently convert AC RF power into DC power.
Yi Joe Low   +3 more
doaj   +1 more source

Dipolar Order Mapping Based on Spin‐Lock Magnetic Resonance Imaging

open access: yesNMR in Biomedicine, Volume 39, Issue 7, July 2026.
To quantify the dipolar order relaxation time T1D$$ {T}_{1D} $$ using spin‐lock MRI technique, we introduce a T1D$$ {T}_{1D} $$‐specific ratio, denoted as RATIOdosl$$ {RATIO}_{dosl} $$. A novel rotary‐echo spin‐lock sequence was developed to enable dual‐frequency spin‐lock acquisition.
Zijian Gao   +4 more
wiley   +1 more source

Beyond 5G and Non‐terrestrial Network (NTN) Integrated Architecture: Access Challenges for Expanding Artificial Intelligence of Things (AIoT)

open access: yesInternational Journal of Satellite Communications and Networking, Volume 44, Issue 4, Page 378-393, July/August 2026.
ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley   +1 more source

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