Results 61 to 70 of about 59,812 (299)
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 +6 more
wiley +1 more source
IEEE AccessWater-level radar systems often rely on horn or lens antennas to achieve narrow-beam coverage and high gain, but scaling these designs for bistatic setups significantly increases size and installation complexity.
Kuang-Hsuan Huang, Yen-Sheng Chen
doaj +1 more source
Research instrumentation for tornado electromagnetics emissions detection [PDF]
, 1977 Instrumentation for receiving, processing, and recording HF/VHF electromagnetic emissions from severe weather activity is described. Both airborne and ground-based instrumentation units are described on system and subsystem levels. Design considerations,
Jenkins, H. H., Wilson, C. S.
core +1 more source
A compact lightweight multipurpose ground-penetrating radar for glaciological applications
, 2011 We describe a compact lightweight impulse radar for radio-echo sounding of subsurface structures designed specifically for glaciological applications. The radar operates at frequencies between 10 and 75 MHz.
Frolovskiy, K. +4 more
core +2 more sources
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 +4 more
wiley +1 more source
Design and Evaluation of a Sector Beam Antenna for 79-GHz Short-Range Radar Sensors
IEEE AccessThis paper presents the design and implementation of sector beam transmit (Tx) antennas for achieving wide detection coverage in a 79-GHz short-range radar (SRR) sensor for automotive or construction heavy equipment applications. The Tx antennas generate
Jae-Ho Lee, Jong Min Lee, Dong-Wook Seo
doaj +1 more source
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
ICT Express, 2015 Integrated radar-communication system based on multiple input and multiple output (MIMO) shares the hardware resource and spectrum to fulfill radar and communication functions, simultaneously.
Renhui Xu +3 more
doaj +1 more source
Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays
, 2019 Increasing the number of transmit and receive elements in multiple-input-multiple-output (MIMO) antenna arrays imposes a substantial increase in hardware and computational costs.
Aboutanios, Elias +2 more
core +1 more source
Ground-penetrating radar antenna modeling [PDF]
IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium, 2002 Detecting subsurface objects by using ground-penetrating radar (GPR) has received considerable interest. In order to interpret radar signals from buried objects, one must have the ability to model a large range of objects, grounds and radar antennas, theoretically or numerically, so that a real GPR system can be simulated. Many investigations have been
Z. Huang, K. Demarest, R. Plumb
openaire +1 more source