Results 41 to 50 of about 7,483 (129)

Optical Coherence Tomography for High‐Precision Industrial Inspection in Industry 4.0: Advances, Challenges, and Future Trends

Laser &Photonics Reviews, Volume 20, Issue 8, 17 April 2026.
This review examines how optical coherence tomography transforms industrial inspection by delivering real‐time, micrometer‐resolution, depth‐resolved imaging. It surveys applications across display manufacturing, thin films, microelectronics, laser processing, and coatings, evaluates performance against conventional techniques, and highlights emerging ...
Nipun Shantha Kahatapitiya, Sm Abu Saleah, Daewoon Seong, Naresh Kumar Ravichandran, Sangyeob Han, Ruchire Eranga Wijesinghe, Mansik Jeon, Jeehyun Kim   +7 more
wiley   +1 more source

Resource Allocation for Symbiotic Radio System With Fading Channels

IEEE Access, 2019
In this paper, we investigate the resource allocation problem for the symbiotic radio system, in which the passive backscatter transmission is parasitic in the primary transmission, and the cooperative receiver simultaneously detects the signals ...
Huayan Guo, Ying-Chang Liang, Ruizhe Long, Sa Xiao, Qianqian Zhang   +4 more
doaj   +1 more source

Manipulating Terminal Bonds of Ti3C2Tx MXene for Highly Efficient Microwave Absorption and Photothermal Conversion

Rare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang, Yuqian Huang, Yibing Lin, Jing Ma, Kaihuan Yu, Bo Zhong, Yuanlie Yu, Ning Li, Li Qiang   +8 more
wiley   +1 more source

Thousand‐Kilometer‐Scale Wavelike Undulations in Ionospheric Plasma Bubble Lifetime and Development Over Wide Longitudes

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The irregularities of ionospheric plasma bubbles (EPBs) sequentially generated over wide longitudes are expected to share similar lifetime under normal conditions. In this study, we report a special case where the EPB irregularity lifetime over wide longitudes showed a quasi‐wavelike undulation pattern with wavelength of ∼3,000 km, that is ...
Wenjie Sun, Yuichi Otsuka, Guozhu Li, Prayitno Abadi, Zequan Wang, Guofeng Dai, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Haiyong Xie, Xiukuan Zhao, Yi Li, Baiqi Ning, Atsuki Shinbori, Michi Nishioka, Septi Perwitasari   +15 more
wiley   +1 more source

Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities

, 2020
Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.
ElMossallamy, Mohamed A., Han, Zhu, Li, Geoffrey Ye, Seddik, Karim G., Song, Lingyang, Zhang, Hongliang   +5 more
core  

First LiDAR Observation of Quasi‐Periodic Structures in Mid‐Latitude E‐Region Meteoric Ca+ Layers

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract We report the first LiDAR observations of continuous quasi‐periodic (QP) metal density structures in mid‐latitude E‐region meteoric Ca+ layers using an all‐solid‐state LiDAR system in Beijing (40.4°N, 116.0°E). These QP Ca+ structures, with periods of 2–30 min and vertical wavelengths of ∼2–15 km, were primarily observed above 100 km.
Jixin Guo, Tao Yu, Lifang Du, Jin Wang, Xiangxiang Yan, Yan Yu, Wenyu Hao, Yifan Qi, Haoran Zheng, Guotao Yang   +9 more
wiley   +1 more source

A Comprehensive Survey on Ambient Backscatter Communications Toward Zero-Energy Devices and Networks

IEEE Open Journal of the Communications Society
The future of wireless communications and the beyond fifth generation (B5G) and sixth generation (6G) standards are expected to constitute technologies that are self-sufficient in terms of energy requirements, without compromising on key performance ...
Ashwini H. Raghavendra, Sanjeev Gurugopinath, Sami Muhaidat   +2 more
doaj   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Engineered Optical Fibers for Deep‐Tissue Applications

Advanced Optical Materials, Volume 14, Issue 10, 13 March 2026.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li, Siyang Zheng, Wenzhao Li, Kai Chen, Tianting Zhong, Chi Man Woo, Weiran Pang, Chuqi Yuan, Xiaozhou Xiao, Xianguang Yang, Long Jin, Xiang Qian, Qiyao Tan, Changyuan Yu, Liwei Liu, Junle Qu, Puxiang Lai   +16 more
wiley   +1 more source

On the Performance of Secured Ambient Backscatter Communications to Protect Digital Content and Copyrights

IEEE Access
Ambient backscatter communications (AmBC) have emerged as a promising solution for sustainable and energy-efficient wireless networks. When integrated with physical layer security (PLS), AmBC systems offer intrinsic protection against unauthorized access,
Tan N. Nguyen, Hye-Young Kim, Phuong T. Tran, Bui Vu Minh, Byung-Seo Kim, Lam-Thanh Tu, Miroslav Voznak   +6 more
doaj   +1 more source