Results 91 to 100 of about 241,717 (322)

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Grounded L-Shaped Corner-Embraced Patch Array Polarization Conversion Metasurface Compatible with Multiband and Broadband Characteristics

Micromachines
We propose a linear polarization rotator metasurface composed of a grounded array of L-shaped corner-embraced patches. Both simulation and experimental results confirm that the metasurface achieves a polarization conversion ratio exceeding 90% across ...
Shi Kong, Yifei Zhang, Ziheng Fu, Rui Yang   +3 more
doaj   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

Forked-Crossing Metasurface for Multi-Band Polarization Conversion with Distinct Bandwidths

Micromachines
This study presents a reflective and highly efficient multi-band metasurface polarization converter based on a forked-crossing patch array. Both simulation and experimental results reveal that such a metasurface achieves polarization conversion ratio ...
Pengpeng Zhang, Yifei Zhang, Ziang Li, Rui Yang   +3 more
doaj   +1 more source

Fundamental Limits on Detection With a Dual-function Radar Communication System [PDF]

, 2022
Bo Tang, Zhongrui Huang, Lilong Qin, Hai Wang   +3 more
openalex   +1 more source

Breast cancer tumour detection using microwave radar techniques [PDF]

, 2004
A breast cancer detection technique using multi-static radar is proposed herein. Images of a breast tumour are produced using this technique, with backscatter data. A wideband antenna design suitable for a breast cancer detection system is also described.
Benjamin, R, Craddock, IJ, Leendertz, J, Nilavalan, R, Preece, A   +4 more
core  

Hydrogel Confinement Strategies for 3D Cell Culture in Microfluidic Systems

Advanced Materials Technologies, EarlyView.
Hydrogel confinement structures are key to organizing 3D cell cultures in microfluidic devices. This review classifies five structural strategies (micropillar, phaseguide, porous membrane, stepped‐height, and support‐free) and examines their trade‐offs alongside fabrication methods.
Soohyun Kim, Min Seok Lee, Sung Kyun Lee
wiley   +1 more source

An EMD Based Sense-Through-Foliage Target Detection UWB Radar Sensor Networks

IEEE Access, 2018
In this paper, we propose an empirical mode decomposition (EMD)-based approach to ultra wide band radar for sense-through-foliage target detection. When the radar signal quality is good, the EMD-based target detection approach performs well by comparing ...
Ganlin Zhao, Qilian Liang, Tariq S. Durrani   +2 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Active control of single-photon spontaneous emission out-coupling enhancement by rotation modulation of hyperbolic metamaterials

iScience
Summary: Controlling the rate and direction of spontaneous emission is critical for quantum technologies such as single-photon sources and secure communications. We propose a tunable nanophotonic device that modulates spontaneous emission by rotating the
Yubin Ma, Muhammad Imran, Muhideen Yahya Musa, Shafi Ullah Khan, Rujiang Li   +4 more
doaj   +1 more source