Results 61 to 70 of about 96,151 (324)

The NOAA TOGA antenna array [PDF]

, 1986
The Aeronomy Laboratory recently installed a 100 x 100 meter array antenna with limited beam steering on Christmas Island as a part of the TOGA (Tropical Ocean and Global Atmosphere) program.
Balsley, B. B., Carter, D. A., Ecklund, W. L.   +2 more
core   +1 more source

Developing reference plans for evaluating global clinical trials credentialing and PSQA systems

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To develop a practical framework for creating a diverse set of validated reference plans (varying in complexity) and implement a workflow to introduce beam modeling, calibration, and delivery errors into the reference cohort to test and compare various dosimetry audit methodologies.
Fre'Etta M. D. Brooks, Mohammad Hussein, Jessica Lye, Christopher L. Nelson, Nakamura Mitsuhiro, Mallory C. Glenn, Patricia Diez, Rushil Patel, Maddison Shaw, Ileana Silvestre Patallo, Miriam Barry, Catharine H. Clark, Joerg Lehmann, Stephen F. Kry   +13 more
wiley   +1 more source

The edge visualization metric: Quantifying the improvement of lung SBRT target definition with 4D CBCT

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Four‐dimensional cone‐beam CT (4D CBCT) incorporates oversampling of 3D data to reconstruct multi‐phase CBCT data sets representing distinct phases of the breathing cycle based on a diaphragmatic correlate of respiratory motion. Motion artifacts and blurring can be reduced relative to three‐dimensional cone‐beam (3D CBCT), allowing ...
Colton Baley, Sam Andersen, Clark Anderson, Shraddha Dalwadi, Daniel L. Saenz   +4 more
wiley   +1 more source

Design of a beam-steering test bench based on OpenVPX architecture

The Journal of Engineering, 2019
Due to a large number of beam-steering units and complex interfaces of a spaceborne phased-array radar, the fault location in joint tests is difficult, the troubleshooting efficiency is low, and the progress of the project is difficult to guarantee.
Yanhua Li, Wenguang Xiao
doaj   +1 more source

2-Dimensional (2D) Beam Steering-Antenna Using Active PRS for 5G Applications

Micromachines, 2022
This paper presents a compact coaxial-fed square microstrip patch antenna integrated with a beam-steering Partially Reflective Surface (PRS). The proposed design has a two-dimensional (2-D) Fabry-Perot Cavity (FPC) antenna acting as a radiator and the ...
Misha Nadeem, Nosherwan Shoaib, Aimen Raza, Warda Saeed, Imran Shoaib, Sultan Shoaib   +5 more
doaj   +1 more source

Reconfigurable phased microstrip antenna array with defected ground structure and defected microstrip structure for beam steering application [PDF]

, 2018
Beam steering is defined as the ability to electronically steer the beam maximum of an antenna electric field pattern to some predefined point in space. The performance of a phased antenna array for beam steering without moving the antennas is important ...
Subhi Ahmad, Khalid
core  

Enhanced analysis of gating latency in 0.35T MR‐linac through innovative time synchronization of a motion phantom and plastic scintillation detector

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study aims to evaluate how different gantry angles, breathing rates (BPM), cine image speeds, and tracking algorithms affect beam on/off latency and the subsequent impact on target dose for a 0.35T MR‐Linac with a 6 MV FFF beam.
Mateb Al Khalifa, Tianjun Ma, Haya Aljuaid, Siyong Kim, William Y. Song   +4 more
wiley   +1 more source

Non-mechanical steering of the optical beam in spectral-domain optical coherence tomography

Scientific Reports
We demonstrate in a proof-of-concept experiment spectral-domain optical coherence tomography where steering of the optical beam that probes the sample in a transverse scan does not make use of any mechanical element.
Daniel F. Urrego, Gerard J. Machado, Juan P. Torres   +2 more
doaj   +1 more source

Grating Lobe-Free Beam Steering through Optical Phase Array Using Phase-Compensated Two Index-Mismatched Silicon Wires-Based Emitters

Applied Sciences, 2020
The beam formation can be treated as the diffraction pattern. A 1-D light detection and ranging beam steering could be derived through a phase shifter array using Rayleigh−Sommerfeld Diffraction, which is then utilized to demonstrate grating lobe ...
Rong-An Zhang, Ting-Sheng Lin, Wai-Ting Liu, Shih-Hsiang Hsu, Che-Chang Chang   +4 more
doaj   +1 more source

Smart License Plate in Combination with Fluorescent Concentrator for Vehicular Visible Light Communication System

Sensors, 2022
Vehicle-to-vehicle communication based on visible light communication has gained much attention. This work proposes a smart license plate receiver incorporated with a fluorescent concentrator, enabling a fast vehicle-to-vehicle communication with a large
Seoyeon Oh, Yejin Lee, Minseok Yu, Seonghyeon Cho, Sana Javed, Hyunchae Chun   +5 more
doaj   +1 more source