Results 21 to 30 of about 14,078,465 (344)

Increase in Fast Response Time of the Resistance-to-Voltage Converter When Monitoring the Cable Products’ Insulation Resistance

open access: yesSensors, 2021
Theoretical and experimental studies were conducted to investigate the impact of the cable capacitance during measurements of insulation resistance on the fast response time of a resistance-to-voltage converter.
Nikolay I. Yermoshin   +3 more
doaj   +1 more source

Terahertz Time-Domain Polarimetry in Reflection for Film Characterization

open access: yesSensors, 2020
Terahertz time-domain spectroscopy is a useful technique to characterize layered samples and thin films. It gives access to their optical properties and thickness.
Sandrine van Frank   +3 more
doaj   +1 more source

High-Frequency Ultrasonic Spectroscopy of Structure Gradients in Injection-Molded PEEK Using a Focusing Transducer

open access: yesSensors, 2023
For high-performance thermoplastic materials, material behavior results from the degree of crystallization and the distribution of crystalline phases. Due to the less stiff amorphous and the stiffer and anisotropic crystalline phases, the microstructural
Jannik Summa   +6 more
doaj   +1 more source

Effects of Environmental and Operational Conditions on Structural Health Monitoring and Non-Destructive Testing: A Systematic Review

open access: yesBuildings, 2023
The development of Structural Health Monitoring (SHM) and Non-Destructive Testing (NDT) techniques has rapidly evolved and matured over the past few decades.
Ayoub Keshmiry   +3 more
semanticscholar   +1 more source

Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review [PDF]

open access: yesAdvances in Mechanical Engineering, 2020
Composite materials/structures are advancing in product efficiency, cost-effectiveness and the development of superior specific properties. There are increasing demands in their applications to load-carrying structures in aerospace, wind turbines ...
Bing Wang   +4 more
semanticscholar   +1 more source

Resolution Limits in Photoacoustic Imaging Caused by Acoustic Attenuation

open access: yesJournal of Imaging, 2019
In conventional photoacoustic tomography, several effects contribute to the loss of resolution, such as the limited bandwidth and the finite size of the transducer, or the space-dependent speed of sound.
Peter Burgholzer   +3 more
doaj   +1 more source

The design and investigation of hydrogel-based metamaterials with ultra large negative hygroscopic expansion ratio

open access: yesInternational Journal of Smart and Nano Materials, 2022
A design strategy for a mechanical metamaterial with large negative hygroscopic expansion (NHE) was proposed in this paper. Different from the reported structures, the present metamaterial is designed by constructing repeated lattice microstructure ...
Lian-Hua Ma   +4 more
doaj   +1 more source

Non-destructive testing of metal-based additively manufactured parts and processes: a review

open access: yesVirtual and Physical Prototyping, 2023
Additive manufacturing (AM) has revolutionised the manufacturing world due to its unique advantages, such as the ability to create complex geometries, work with dissimilar metallic materials, eliminate the need for molds or fixed tooling, and provide ...
Jing Rao   +4 more
semanticscholar   +1 more source

A modular FPGA-based ultrasonic array system for applications including non-destructive testing [PDF]

open access: yes, 2008
This paper reports work aimed at the development of an ultrasonic imaging system comprising modular, reprogrammable building blocks, or tiles, which can be customised for multiple applications, including and within non-destructive testing (NDT), by the ...
Afroukh, F.   +6 more
core   +1 more source

Quantitative coating thickness determination using a coefficient-independent hyperspectral scattering model

open access: yesJournal of the European Optical Society-Rapid Publications, 2017
Background Hyperspectral imaging is a technique that enables the mapping of spectral signatures across a surface. It is most commonly used for surface chemical mapping in fields as diverse as satellite remote sensing, biomedical imaging and heritage ...
Liesbeth M. Dingemans   +4 more
doaj   +1 more source

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