Results 21 to 30 of about 389,631 (317)
Scattering of Elastic Waves by an Inhomogeneous Boundary in the Acoustic Testing of Permanent Joints
Приборы и методы измерений, 2019 Improving the reliability and testing performance of permanent joints оf different materials made by welding, spraying, gluing, soldering and other methods is an important production task, for which the ultrasonic method is the simplest and most ...
A. R. Baev +3 more
doaj +1 more source
Pattern of failure after high-dose thoracic radiation for non-small cell lung cancer: the University of Michigan experience [PDF]
, 2012 PurposeOur main purpose is to study the pattern of local failure for patients with non-small cell lung cancer treated with conformal therapy.MethodsThis study included patients who failed locally and a matched group without failures after 3D conformal ...
Cronin, Paul +7 more
core +1 more source
FORMATION OF THE DIRECTION DIAGRAM IN PHASED ANTENNA ARRAY
Российский технологический журнал, 2019 The article presents the results of the study of phase and temporal methods in the formation of the direction diagram of phased antenna array, and carries out a comparative analysis using an eight-element equidistant antenna array based on Vivaldi ...
N. M. Legkiy, I. V. Unchenko
doaj +1 more source
Autonomous Drone-Based Antenna Radiation Pattern Characterization [PDF]
, 2022 This paper presents an automated workflow for antenna radiation pattern characterization based on an autonomous Unmanned Aerial Vehicle (UAV) or drone. To this end, first a radio frequency payload is fitted in a gimbal and mounted on the UAV to simulate ...
Henrik Midtiby +7 more
core +1 more source
Field Tests for Generating Source System and Picking the Seismic Shear Waves to Meet the Engineering Purposes Requirements. [PDF]
Kirkuk Journal of Science, 2019 Many seismic field tests were carried for the designed and modified seismic apparatuses using to generate seismic shear waves. These apparatus includes: "wooden plank" horizontal traction shear wave source, and a modified geophone for picking the SH-Wave
Muhana Ahmed
doaj +1 more source
IEEE Access, 2023 This work is concerned with a detailed study of an active antenna, which can serve as a prototype of a phased array antenna element for a future lunar very-low-frequency (VLF) radio telescope operating in the frequency range of 1–30 MHz.
Peter L. Tokarsky +2 more
doaj +1 more source
The Radiation Pattern on an Ultrasonic Focusing Radiator [PDF]
The Journal of the Acoustical Society of America, 1947 A focusing quartz radiator made in the form of a concave-convex lens of constant thickness (and being X-cut on the axis) should radiate spherical sound waves which focus at the center of curvature of the radiator surfaces. Because of wave diffraction, the focus should deviate from infinitely sharp in the same manner as is well known in the optical ...
openaire +1 more source
Brain and SpineIntroduction: Cervical central spinal stenosis (CCSS) is a leading cause of adult spinal cord dysfunction. Magnetic resonance imaging (MRI) is the reference standard, but reporting is time-consuming and subject to inter-observer variability.
Vasileios Mougios +8 more
doaj +1 more source
Radiation pressure on a moving body: Beyond the Doppler effect
, 2012 Copyright © 2012 Optical Society of AmericaThis paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA.
Artoni, M. +7 more
core +1 more source
Plant Foliar Geometry as a Biomimetic Template for Antenna Design
Biomimetics, 2023 Plant diversity includes over 300,000 species, and leaf structure is one of the main targets of selection, being highly variable in shape and size. On the other hand, the optimization of antenna design has no unique solution to satisfy the current range ...
Jose Ignacio Lozano +5 more
doaj +1 more source