Results 121 to 130 of about 1,999,725 (279)

Kaleidoscopic Electromagnetic Wave Manipulation via a Universal Reconfigurable Metasurface Platform

Electron, EarlyView.
A multidimensional reconfigurable metasurface enables independent control of the amplitude, phase, polarization, and spectral responses of reflected electromagnetic (EM) waves. Integrating spatial, polarization, and spectral manipulation within a single platform, it provides a versatile solution for intelligent EM systems, next‐generation wireless ...
Wanting Tong, Yi Wu, Ye Deng, Cheng Zhang, Chaoyun Song, Yizhou Shen, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng   +9 more
wiley   +1 more source

Char Layer Thickness Evolution During Structural Timber Fire Experiment and Final Density Profile

Fire and Materials, EarlyView.
ABSTRACT This paper evaluates several non‐destructive experimental methods for determining the char layer thickness and its density profile in structural timber samples exposed to standard ISO 834 fire curve experiments. Microwave echo pulse, ultrasonic echo pulse, X‐ray computed tomography, and resistance drilling were evaluated.
Fernando Pérez Pérez, Kiarash Tajbakhsh, Joachim Schmid, Robert Zboray, Andrea Frangi   +4 more
wiley   +1 more source

Inferring personal attributes with a millimeter wave radar

, 2023
reservedThis thesis employs a millimeter wave radar system for the analysis of gait patterns in various data subjects using point cloud data. This thesis aims to employ a deep learning model for extracting valuable insights from the point clouds and ...
TAMAYO GONZALEZ, CINTHYA CELINA
core  

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source

Urban traffic congestion alleviation system based on millimeter wave radar and improved probabilistic neural network

IET Radar, Sonar & Navigation
The millimeter‐wave radar sensor is widely used for urban traffic surveillance because of its weather resistance and high detection accuracy. Methods such as fuzzy theory, pattern recognition, and artificial neural networks have been integrated into the ...
Bo Yang, Hua Zhang, Mengxin Du, Anna Wang, Kai Xiong   +4 more
doaj   +1 more source

How Thunderstorms Are Changing in Mexico: Trends and Characteristics

International Journal of Climatology, EarlyView.
Thunderstorm days in Mexico have increased significantly since 1992, with pronounced regional and seasonal contrasts. Increasing moisture emerges as the most spatially coherent environmental signal. At the same time, enhanced instability characterizes northeastern and central Mexico, revealing distinct regional controls on thunderstorm activity and ...
José Francisco León‐Cruz, Alejandro Jaramillo‐Moreno, Karla Pereyra‐Castro, Christian Dominguez   +3 more
wiley   +1 more source

Assessing plant water status: Part 2 – Non‐destructive and remote sensing approaches

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Precise, real time and non‐destructive assessment of plant water status is important for advancing plant physiological understanding, optimizing water usage, improving crop resilience and supporting precision agriculture in the face of increasingly variable climatic conditions.
Naila Farooq, Bo Zhang, Bastian Leander Franzisky, Tasawer Abbas, Jochen Taiber, Martin Koch, Ian C Dodd, Christoph‐Martin Geilfus   +7 more
wiley   +1 more source

Ultra‐Fast and Energy‐Efficient PZT Optical Tunable Delay Lines for Programmable Photonic Systems

Laser &Photonics Reviews, EarlyView.
Thin‐film PZT enables optical tunable delay lines that simultaneously offer sub‐nanosecond switching, low propagation loss, and zero‐static‐power programmability. A five‐bit on‐chip delay line provides a maximum delay of 387.5 ps with a resolution of 12.5 ps, while reconfigurable MZI splitting ratios further enable non‐volatile optical arbitrary ...
Cunyu Shi, Chenlei Li, Wei Chen, Shengjie Tang, Tao Shu, Haojie Zhu, Haorui Liu, Yueyang Zhang, Long Zhang, William Shieh, Feng Qiu, Daoxin Dai   +11 more
wiley   +1 more source

High‐resolution three‐dimensional ground‐penetrating radar imaging of surface masonry arrangement in frescoed Roman walls at Pompeii

Near Surface Geophysics, EarlyView.
Abstract The widespread presence of frescoes in newly excavated domus at Pompeii conceals the wall masonry arrangement, preventing direct geometric survey while excluding invasive diagnostic approaches. Reliable knowledge of masonry geometry is nonetheless essential for structural assessment and conservation planning in a seismically active region ...
Sara Donzelli, Lorenza Petrini, Stefano Munda, Maurizio Lualdi   +3 more
wiley   +1 more source

Geophysical investigation at Sainte‐Marguerite‐sur‐Mer (Normandy, France): From a supposed landfill to a forgotten military network?

Near Surface Geophysics, EarlyView.
Abstract This study focuses on characterising a strong and unexpected anomaly observed during an electromagnetic induction (EMI) survey conducted on the chalk cliff plateau at Sainte‐Marguerite‐sur‐Mer, in the Normandy region, France. The site was selected for a long‐term study of chalk cliff coastal erosion that began in 2017 and has been studied for ...
Sarah Thuillier, Cécile Finco, Fayçal Rejiba, Cyrille Fauchard   +3 more
wiley   +1 more source