Results 131 to 140 of about 1,095,168 (305)

A diagnostic technique used to obtain cross range radiation centers from antenna patterns [PDF]

open access: yes
A diagnostic technique to obtain cross range radiation centers based on antenna radiation patterns is presented. This method is similar to the synthetic aperture processing of scattered fields in the radar application. Coherent processing of the radiated
Burnside, W. D., Lee, T. H.
core   +1 more source

[18F]Fluorodeprenyl‐D2 PET as a Tool to Monitor Disease Activity in GAD65‐Ab Autoimmune Encephalitis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate [18F]fluorodeprenyl‐D2 ([18F]F‐DED) positron‐emission tomography (PET) imaging as a biomarker of disease activity in autoimmune encephalitis (AIE) associated with glutamic acid decarboxylase 65 (GAD65) antibodies. Methods [18F]F‐DED PET was performed in 25 GAD65‐AIE patients and 8 controls using dynamic (0–60 min) and ...
Julia S. Dorneich   +19 more
wiley   +1 more source

High‐Resolution MRI Revealed Different Etiology‐Specific Associations With Cerebral Infarction in Adult Moyamoya Vasculopathy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐resolution MRI enables detailed assessment of intracranial vessel wall pathology in moyamoya vasculopathy. We aimed to classify adult moyamoya vasculopathy etiologies using high‐resolution MRI and to examine subtype‐specific associations between high‐resolution MRI features and ischemic infarction.
Guangsong Han   +8 more
wiley   +1 more source

The temporal structure of RF radiation from lightning [PDF]

open access: yes
Radiation from lightning in the RF band from 3-300 MHz has been examined. Simultaneous measurements were made of the RF radiation from lightning together with records of fast and slow field changes.
Levine, D. M.
core   +1 more source

ABOUT DETECTION AND RESOLUTION OF LOW-CONTRAST SEDENTARY RADAR TARGETS THAT ARE WITHIN A RESOLUTION ELEMENT

open access: yesНаучный вестник МГТУ ГА, 2016
It is proposed to use the full polarization mode scanning for the detection of weak-contrast targets against the background of the underlying sheets, as well as the construction of space-loop polarization targets for the case of incoherent reflections ...
I. V. Avtin, A. V. Trushin
doaj  

Algorithm for Assessing the Characteristics of a Waveguide Slot Antenna Array when Changing Antenna Element Phasing

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника
Introduction. When operating antennas in various radio-electronic systems, the influence of phase shifter (PS) failures on the characteristics of phased array antennas, waveguide-slot phased array antennas (WSPAA) in particular, should be taken into ...
A. F. Kryachko   +3 more
doaj   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Experimental Study of Coherent Collaborative Processing Method in Distributed Automotive Radar

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника
Introduction. Intelligent driver assistance systems are increasingly employing radar systems to detect, resolve, and track various classes of targets. The use of MIMO-based distributed systems allow the characteristics of object resolution by angle to be
A. A. Kuzin   +4 more
doaj   +1 more source

Radiation Patterns and Radiation Fields [PDF]

open access: yesIndiana University Mathematics Journal, 1955
openaire   +2 more sources

Adjustment of Coatings Morphology and Particle Distribution of Layered Silicates by Freeze‐Drying for Improved Gas Barriers

open access: yesAdvanced Engineering Materials, EarlyView.
Freeze‐drying of layered silicate is the key to get coatings with superior gas barrier. Freeze‐drying of layered silicates modified with dodecylamine (DDA) is a highly effective technique for the preparation of barrier pigments that significantly mitigate the permeation of oxygen, water vapor, and hydrogen through polymer films containing these ...
Joshua Lommes   +4 more
wiley   +1 more source

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