Results 21 to 30 of about 9,736 (263)
IEEE Open Journal of Instrumentation and MeasurementThis study presents the results of using a millimeter-wave reflectometer system, operating at 150 GHz, for demonstrating the basic efficacy of measuring electromagnetic scattering of metal powder used in laser powder bed fusion (LPBF) additive ...
Farzaneh Ahmadi, Reza Zoughi
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AIP Advances, 2021 This paper proposes a novel design for a hermetically sealable device, consisting of charged linear and nonlinear membranes driven in the gigahertz range in vacuum setting, as a source of antibunched single phonons.
Jayant K. Nema +3 more
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Numerical study of beam shape adaptation by anisotropic disk covering transducer or metamaterial
Acta Acustica, 2023 Metamaterials are intensely explored for their capabilities to modify sound beams. In addition to frequency filtering, acoustic lenses offer intriguing possibilities for shaping sound beams.
Declercq Nico F.
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Vibration-Based Approach to Measure Rail Stress: Modeling and First Field Test
Sensors, 2022 This paper describes a non-invasive inspection technique for the estimation of longitudinal stress in continuous welded rails (CWR) to infer the rail neutral temperature (RNT), i.e., the temperature at which the net longitudinal force in the rail is zero.
Matthew Belding +2 more
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Nondestructive evaluation [PDF]
, 1997 Research reported in the thrust area of nondestructive evaluation includes: advanced 3-D imaging technologies; new techniques in laser ultrasonic testing; infrared computed tomography for thermal NDE of materials, structures, sources, and processes; automated defect detection for large laser optics; multistatic micropower impulse radar imaging for ...
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Lensing in the Ultrasonic Domain using Negative Refraction Induced by Material Contrast
Scientific Reports, 2019 The focusing of ultrasound using topographic lenses, typically made of plates with step changes that cause an interaction between forward- and backward-propagating guided waves, has been widely studied in recent years.
C. T. Manjunath, Prabhu Rajagopal
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Applied Sciences, 2022 Defects are a leading issue for the rejection of parts manufactured through the Directed Energy Deposition (DED) Additive Manufacturing (AM) process. In an attempt to illuminate and advance in situ quality monitoring and control of workpieces, we present
Steven Hespeler +4 more
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Nondestructive Evaluation of Special Defects Based on Ultrasound Metasurface
Frontiers in Materials, 2022 We demonstrate the nondestructive evaluation by means of directional ultrasound emitted from a planar metasurface. The ultrasound metasurface is designed to generate the collimated and directional ultrasound efficiently in a planar configuration, which ...
Hualiang Zhao +6 more
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Nondestructive evaluations [PDF]
, 1993 This report discusses Nondestructive Evaluation (NDE) thrust area which supports initiatives that advance inspection science and technology. The goal of the NDE thrust area is to provide cutting-edge technologies that have promise of inspection tools three to five years in the future.
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FEBS Open Bio, EarlyView.NMR metabolomics revealed concentration‐dependent metabolic perturbations in HepG2 cells exposed to H2O2. Rifampicin pretreatment enhanced metabolic competence, attenuated toxin‐induced alterations and produced metabolite profiles more consistent with human liver physiology, supporting the use of CYP450‐induced HepG2 models for improved in vitro ...
Maren Jinks +4 more
wiley +1 more source