|
|
|
|
|
Rana Sadaf Anwar, Lingfeng Mao and Huansheng Ning
The intent of this paper is to provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs). FSS is a periodic surface with identical two-dimensional arrays of elem...
ver más
|
|
|
|
|
|
|
|
|
|
|
Redwan Ahmad, Mariia Zhuldybina, Xavier Ropagnol, Ngoc Duc Trinh, Chloé Bois, Juan Schneider and François Blanchard
We designed and fabricated a terahertz (THz) frequency selective surface (FSS) based on two distinct additive manufacturing technologies, namely, printable electronics (PE) and three-dimensional (3D) printing. Silver nanoparticle ink was printed on a pol...
ver más
|
|
|
|
|
|
|
|
|
|
|
Abhisit Sripradit and Thorin Theeradejvanichkul
A self-color-changing film aimed at enhanced security and anti-counterfeit packaging is presented. Its function is to change color automatically when flipped under visible light. It is low-cost, takes a few seconds to check by the naked eye, and does not...
ver más
|
|
|
|
|
|
|
|
|
|
|
Walter Fuscaldo, Dimitrios C. Zografopoulos, Francesca Imperato, Paolo Burghignoli, Romeo Beccherelli and Alessandro Galli
The tunable properties of nematic liquid crystals (NLC) are here exploited in a peculiar leaky waveguide with artificial magnetic conductors as the lateral walls, a bottom metal ground plane, and a homogenized metasurface on top to obtain dynamic beamste...
ver más
|
|
|
|
|
|
|
|
|
|
|
Syeda Fizzah Jilani, Oluyemi P. Falade, Tom Wildsmith, Paul Reip and Akram Alomainy
This paper demonstrates a design, fabrication and performance evaluation of a frequency selective 60-GHz flexible metasurface in order to facilitate an unobstructed, secure, and low-loss high-frequency signal propagation. The high-attenuation 60 GHz mill...
ver más
|
|
|
|
|
|
|
|
|
|
|
Syed S. Bukhari, J (Yiannis) Vardaxoglou and William Whittow
This paper is a critical review of metasurfaces, which are planar metamaterials. Metamaterials offer bespoke electromagnetic applications and novel properties which are not found in naturally occurring materials. However, owing to their 3D-nature and res...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shenren Xu, Jiazi Zhao, Hangkong Wu, Sen Zhang, Jens-Dominik Müller, Huang Huang, Mohammad Rahmati and Dingxi Wang
Nonlinear, time-linearized and adjoint Reynolds-averaged Navier-Stokes (RANS) computational fluid dynamics (CFD) solvers are widely used to assess and improve the aerodynamic and aeroelastic performance of aircrafts and turbomachines. While RANS CFD solv...
ver más
|
|
|
|
|
|
|
|
|
|
|
Nina N. Gakhova,Vladimir P. Pashintsev,Eugene K. Katkov,Tatyana V. Zaytseva,Tatyana N. Balabanova
The work deals with the issues of the determination of the probability of frequency-selective fading (FSF) of navigational radio signals in satellite radio navigation systems under artificial ionosphere disturbances. The connection between the coherence ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Geice Paula Villibor, Fábio Lúcio Santos, Daniel Marçal de Queiroz, Joseph Kalil Khoury Júnior, Francisco de Assis de Carvalho Pinto
Pág. 41 - 48
Detachment of coffee fruit is usually accomplished by means of mechanical impacts and vibrations applied to the plant. Modal properties of the coffee fruit-stem system represent important information for efficient and selective harvesting. This study aim...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yuzhi Zhang, Shumin Zhang, Bin Wang, Yang Liu, Weigang Bai and Xiaohong Shen
Orthogonal time frequency space (OTFS) is a novel two-dimensional (2D) modulation technique that provides reliable communications over time- and frequency-selective channels. In underwater acoustic (UWA) channel, the multi-path delay and Doppler shift ar...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yuriy Zaspa,Aleksandr Dykha,Dmytro Marchenko,Serhii Matiukh,Yuri Kukurudzyak
Pág. 25 - 34
The physical mechanisms have been investigated that form and transform the corpuscular-vortex-wave thermal complexes of disturbances in contact tribosystems based on the quantum-mechanical exchange interaction. The presence of a contact gap determines th...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yana Saprykina, Burak Aydogan and Berna Ayat
On the basis of field experiments and modeling, the dependence of the dissipation of the energy of waves breaking by plunging and spilling on the frequency of wave spectra was investigated. It was shown that the modeling of wave breaking should take into...
ver más
|
|
|
|
|
|
|
|
|
|
|
Sanjin Valcic, Antonio ?krobonja, Lovro Maglic and Boris Svilicic
Maritime non-commercial communications are performed using the equipment of Global Maritime Distress and Safety System (GMDSS), under the International Convention for the Safety of Life at Sea (SOLAS). This equipment includes numerous devices of differen...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rongguo Song, Xiaoxiao Chen, Shaoqiu Jiang, Zelong Hu, Tianye Liu, David G. Calatayud, Boyang Mao and Daping He
With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenn...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jiayi Zhao, Jingjing Hu, Pengcheng Deng, Runze Yu, Ruoxian Liu, Mingshan Zhao and Yiying Gu
In this paper, a novel approach to achieving a wideband tunable dual-passband microwave photonic filter (MPF) is proposed based on optical-injected distributed feedback (DFB) semiconductor lasers and a dual-output Mach?Zehnder modulator (DOMZM). The fund...
ver más
|
|
|
|
|
|
|
|
|
|
|
Mohammed Y. Bendimerad,Fatima Debbat,Fethi T. Bendimerad
Pág. 180 - 186
Non-contiguous orthogonal frequency division multiplexing (NC-OFDM) is a promising framework for wireless communication systems due to OFDM characteristics like the spectral bandwidth efficiency, robustness to frequency selective fading channels, etc. Ho...
ver más
|
|
|
|
|
|
|
|
|
|
|
Aldona Dobrzycka-Krahel, Michal E. Skóra and Agnieszka Pladzyk
The signal crayfish Pacifastacus leniusculus is one of the most widespread non-indigenous crayfish in Europe and is of interest to aquaculture in many countries. Once they escape into the wild, they disperse and become a potential source of food exploite...
ver más
|
|
|
|
|
|
|
|
|
|
|
Juliet Chebet Moso, Stéphane Cormier, Cyril de Runz, Hacène Fouchal and John Mwangi Wandeto
Intelligent transportation systems (ITS) enhance safety, comfort, transport efficiency, and environmental conservation by allowing vehicles to communicate wirelessly with other vehicles and road infrastructure. Cooperative awareness messages (CAMs) conta...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yun Ha Song, Hee Chul Woo and Jaekyoung Lee
Marine biomass has attracted attention as an environmentally sustainable energy source that can replace petroleum-based resources. Alginates, the main natural polysaccharides extracted from seaweeds, are used in various fields, such as food, pharmaceutic...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xiangjun Yun, Jinrui Wu, Bo Xu, Shijie Lv, Le Zhang, Wenguang Zhang, Shixian Sun, Guixiang Liu, Yazhou Zu and Bin Liu
Due to climate change and global warming, the frequency of sandstorms in northern China is increasing. Stipa breviflora, a dominant species in Eurasian grasslands, can help prevent desertification from becoming more serious. Studies on S. breviflora cove...
ver más
|
|
|
|
|
|