Results 31 to 40 of about 20,529 (185)

Comparison of numerical integration methods for calculating diffraction of a plane electromagnetic wave by a rectangular aperture

Компьютерная оптика, 2021
We discuss features of the calculation of a Fraunhofer integral by traditional quadrature numerical integration methods and a special collocation Levin method when calculating the diffraction of a plane electromagnetic wave by a rectangular aperture. For
A.S. Mokeev, V.M. Yamshchikov
doaj   +1 more source

An improved video watermarking algorithm with extraction using a mobile device camera

Компьютерная оптика, 2023
The use of screen-capture-resistant digital watermarks is a promising way to store information invisibly in a video stream for later retrieval by the user using a smartphone camera.
O.O. Evsutin, A.S. Melman, D.I. Podbolotov, A.G. Stankevich   +3 more
doaj   +1 more source

Separated Liquid–Vapor Flow Analysis in a Mini-Channel with Mesh Walls in the Closed-Loop Two-Phase Wicked Thermosyphon (CLTPWT)

Energies, 2023
A metallic wire mesh screen, wire diameter of approximately 50 μm, is folded into ~80 “accordion-shaped” mini-channels and placed inside the evaporator package of a novel passive thermal management device for cooling overhead light-emitting diodes (LEDs)
Karthik S. Remella, Frank M. Gerner
doaj   +1 more source

DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets, N. P. Yeliseyeva, S. L. Berdnyk, O. M. Horobets   +3 more
doaj   +1 more source

Improved Wearable Devices for Dietary Assessment Using a New Camera System

Sensors, 2022
An unhealthy diet is strongly linked to obesity and numerous chronic diseases. Currently, over two-thirds of American adults are overweight or obese.
Mingui Sun, Wenyan Jia, Guangzong Chen, Mingke Hou, Jiacheng Chen, Zhi-Hong Mao   +5 more
doaj   +1 more source

Preparation and Performance Evaluation of Bamboo Lumber Prepared by Assembly and Glue-Curing of Naturally Arc-Shaped Segments with Finger Joints

BioResources, 2015
Using bamboo to replace wood has great significance for the protection of forests. This work presents the concept of the reorganization of arc bamboo sheet to produce recombined arc-segment bamboo lumber (RABL).
Jianbo Zhou, Lisheng Chen, Wansi Fu, Zhongjia Chen, Zhangrong Zhao, Wanli Cheng, Zhankuan Zhang   +6 more
doaj   +1 more source

Mechanical simulation for the bending process of the AMOLED panel pad

Journal of Information Display, 2023
Panel pad bending is a critical process to improve the screen-to-body ratio of an active-matrix organic light-emitting diode (AMOLED) panel. The failure analysis of the metal wirings is the key to ensure the reliability of signal transmission when the ...
Di Wu, Yongzhen Jia, Dunming Liao, Bo Zhang, Chen Liu, Ning Wang, Wenjing Peng, Liting Huang   +7 more
doaj   +1 more source

Virtual Lab to run experiments of oscillations of a stretched rectangular membrane

Industrial Data, 2017
A Virtual Lab to run educational computer simulations of a vibrating membrane has been created. This educational virtual lab may be used to support some courses in the vibration engineering career. The module solves the 2D wave equation for a rectangular
Javier Montenegro Joo
doaj   +1 more source

A FABRY-PEROT METARESONATOR SUPPORTING TRAPPED-MODE RESONANCES [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: Investigation of the electrodynamic properties of a Fabry-Perot metaresonator formed by two parallel perfectly conducting, two-dimensionally periodic, two-element screens of finite thickness with rectangular holes.
A. V. Gribovsky
doaj   +1 more source

Finite Element Analysis of Air Flow and Temperature Distribution on Surface of a Circular Obstacle with Resistance and Orientation of Screen

Journal of Mathematics, 2021
Nonisothermal flow through the rectangular channel on a circular surface under the influence of a screen embedded at the middle of a channel at angles θ is considered.
Abid A. Memon, M. Asif Memon, Aisha M. Alqahtani, Kaleemullah Bhatti, Kamsing Nonlaopon, Ilyas Khan, Mulugeta Andualem   +6 more
doaj   +1 more source