Results 101 to 110 of about 4,697 (230)

Fiber Bragg Grating Force Sensors for Minimally Invasive Surgery: State of the Art, Challenges, and Opportunities

SmartBot, EarlyView.
This article reviews the application of fiber Bragg grating (FBG) technology for precise force sensing in minimally invasive surgery. It outlines the fundamental working principles and algorithms used to interpret sensor data. The text surveys clinical applications across various medical fields, such as ophthalmology and vascular intervention (Table of
Shiyuan Dong, Tianqi Huang, Lingyu Chen, Shucong Yin, Qing Chang, Dingpei Han, Yangxi Li, Boyu Zhang, Hongen Liao, Fang Chen   +9 more
wiley   +1 more source

Enhanced Actuation Stability of Liquid Crystal Elastomer Actuators With Diels–Alder Dynamic Bonds

Small, EarlyView.
By leveraging furan substitution, enhanced thermal stability during actuation of liquid crystal elastomers (LCEs) with Diels–Alder dynamic (DA) bonds was achieved. This work demonstrates that 3‐substituted furan broadens the actuation window of LCEs with DA bonds and enables superior thermomechanical stability and cycling performance at elevated ...
Konstantinos Stamatis, Yoo Jin Lee, Asaf Dana, Manivannan Sivaperuman Kalairaj, Caleb A. Crusco, Jared A. Gibson, Sasha M. George, Svetlana A. Sukhishvili, Taylor H. Ware   +8 more
wiley   +1 more source

Hydrothermal‐Assisted In Situ Intercalation Synthesis of Ti3C2Tx MXene in 6 Hours

Small Methods, EarlyView.
This work presents a rapid, scalable strategy for synthesizing Ti3C2Tx MXene through hydrothermal‐assisted etching with in situ intercalation, achieving complete synthesis and delamination within 6 h at 90°C. The process accelerates aluminum removal, promotes efficient delamination, and enables direct exfoliation under mild conditions, producing high ...
Muhammad Imran Rameel, Gediminas Monastyreckis, Filipa M. Oliveira, Bing Wu, Jiří Šturala, Vlastimil Mazánek, Zdeněk Sofer, Daiva Zeleniakiene   +7 more
wiley   +1 more source

Evaluation of prestress losses in concrete beams using destructive and non‐destructive methods

Structural Concrete, EarlyView.
Abstract Over the past few decades, prestressing techniques have become essential in the construction of key structures, infrastructure, and bridges. The serviceability and safety of prestressed concrete (PC) elements are closely tied to the effectiveness of the prestressing process.
A. N. Consiglio, G. Muciaccia, G. Rosati
wiley   +1 more source

Bandwidth-Variable and Wavelength-Tunable Waveguide Bragg Grating Filter

IEEE Photonics Journal
We propose and demonstrate a waveguide Bragg grating filter that is bandwidth-variable and wavelength-tunable. The filter is implemented using a pair of apodized waveguide Bragg gratings in silicon-on-insulator that are tuned thermally.
Luyao Xie, Lawrence R. Chen
doaj   +1 more source

The Crystal Structures of High‐ and Low‐Temperature Silver Pyrophosphate: Structural Instability and Its Consequences

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The crystal structures of the high‐temperature and low‐temperature phases of silver pyrophosphate are reported. The structural results are complemented by thermal analysis, vibrational and 31P‐MAS‐NMR spectroscopy studies, and density functional theory calculations.
Matthias Weil, Bertold Stöger, Enrique J. Baran, Ekkehard Füglein, Robert Glaum, Eva‐Maria Hammer, Branimir Raguž, Thomas Bredow, Eugen Libowitzky   +8 more
wiley   +1 more source

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

High Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang, Jihang Sun, Jialin Wang, Bin Wei, Guoming Ma   +4 more
wiley   +1 more source

VCSEL with intra-cavity circular Bragg gratings for single-mode operation

AIP Advances
In this paper, we present the design and fabrication of a single-mode Vertical-Cavity Surface-Emitting Laser (VCSEL) incorporating circular Bragg gratings (CBGs).
Shanting Hu, Xinchen Zhang, Chengyuan Lee, Bo Tian, Lei Zhu, Xiangjun Xin   +5 more
doaj   +1 more source

Wavefront sensing at a high‐repetition‐rate X‐ray free‐electron laser

Journal of Synchrotron Radiation, EarlyView.
We demonstrate a fast, robust and sensor‐free approach to X‐ray speckle tracking that enables shot‐to‐shot wavefront characterization at high‐repetition‐rate X‐ray free‐electron lasers. Our measurements reveal a hierarchy of wavefront fluctuations indicative of instabilities in the accelerator and beamline optics at the European XFEL.Wavefront ...
Trey Guest, Patrik Vagovič, Luigi Adriano, Johan Bielecki, Sarlota Birnsteinova, Rita Graceffa, Jayanath Koliyadu, Kaye Morgan, Hiiro Moriyama, Daniel Mosko, Grant van Riessen, Kristian Sabol, Tokushi Sato, Peter Szeles, Zane Taylor, Jozef Uličný, Richard Bean, Adrian P. Mancuso, Brian Abbey   +18 more
wiley   +1 more source

Bragg coaxial microwave structure in the sensor system

Физика волновых процессов и радиотехнические системы, 2014
The paper discusses the Bragg microwave structures on the coaxial cable that are based on optical technology transfer by analogy with fiber Bragg gratings.
G.A. Morozov, O.G. Morozov, A.R. Nasybullin, A.A. Sevastjanov, R.V. Farkhutdinov   +4 more
doaj