Results 11 to 20 of about 393,670 (279)

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

Sensors, 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, Evgeny V. Yakimov, Aleksandr E. Goldshtein, Dmitry A. Sednev   +3 more
doaj   +1 more source

Terahertz Time-Domain Polarimetry in Reflection for Film Characterization

Sensors, 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, Elisabeth Leiss-Holzinger, Michael Pfleger, Christian Rankl   +3 more
doaj   +1 more source

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

Sensors, 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, Moritz Kurkowski, Christian Jungmann, Ute Rabe, Yvonne Spoerer, Markus Stommel, Hans-Georg Herrmann   +6 more
doaj   +1 more source

Possibility of using non-metallic check samples to assess the performance of penetrant materials and the sensitivity of penetrant testing

Стандартные образцы, 2017
INTRODUCTION. Liquid penetrant testing (PT) is one of the most widely used non-destructive testing methods for detecting surface discontinuities in nonporous solid materials.
Irina S. Lobanova, Aleksey N. Kalinichenko, Nikolay P. Kalinichenko, Ekaterina N. Kamysheva   +3 more
doaj   +1 more source

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

International 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, Su-Dong Wang, Jia Liu, Hong Gao, Wei Zhou   +4 more
doaj   +1 more source

Non-destructive testing of composite plates by holographic vibrometry [PDF]

, 2014
We report on a wide-field optical monitoring method for revealing local delaminations in sandwich-type composite plates at video-rate by holographic vibrometry.
Atlan, Michael, Bruno, Francois, Lamboul, Benjamin, Laurent, Jérôme, Passilly, Bruno, Prada, Claire   +5 more
core   +4 more sources

Resolution Limits in Photoacoustic Imaging Caused by Acoustic Attenuation

Journal 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, Johannes Bauer-Marschallinger, Bernhard Reitinger, Thomas Berer   +3 more
doaj   +1 more source

Spectral-Coding-Based Compressive Single-Pixel NIR Spectroscopy in the Sub-Millisecond Regime

Sensors, 2021
In this contribution, we present a high-speed, multiplex, grating spectrometer based on a spectral coding approach that is founded on principles of compressive sensing.
Paul Gattinger, Ivan Zorin, Christian Rankl, Markus Brandstetter   +3 more
doaj   +1 more source

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

Journal 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, Vassilis M. Papadakis, Ping Liu, Aurèle J. L. Adam, Roger M. Groves   +4 more
doaj   +1 more source

Apprenticeship Standard : Non-Destructive Testing Engineer [PDF]

, 2016
High-efficiency video compression technology is of primary importance to the storage and transmission of digital medical video in modern medical communication systems.
Kebin Jia, Pengyu Liu, Yuan Gao, Yueying Wu   +3 more
core   +6 more sources