Results 101 to 110 of about 33,808 (304)

Atmospheric Sound Propagation over Rough Sea: Numerical Evaluation of Equivalent Acoustic Impedance of Varying Sea States

Acoustics
This work presents a numerical study on atmospheric sound propagation over rough water surfaces with the aim of improving predictions of sound propagation over long distances.
Andrea Vecchiotti, Teresa J. Ryan, Joseph F. Vignola, Diego Turo   +3 more
doaj   +1 more source

Characterization of Droplet Formation in Ultrasonic Spray Coating: Influence of Ink Formulation Using Phase Doppler Anemometry and Machine Learning

Advanced Materials Technologies, EarlyView.
This study explores how machine learning models, trained on small experimental datasets obtained via Phase Doppler Anemometry (PDA), can accurately predict droplet size (D32) in ultrasonic spray coating (USSC). By capturing the influence of ink complexity (solvent, polymer, nanoparticles), power, and flow rate, the model enables precise droplet control
Pieter Verding, Danny E. P. Vanpoucke, Yunus T. Aksoy, Tobias Corthouts, Maria R. Vetrano, Wim Deferme   +5 more
wiley   +1 more source

Acoustic spectra of a gas-filled rotating spheroid [PDF]

, 2019
The acoustic spectrum of a gas-filled resonating cavity can be used to indirectly probe its internal velocity field. This unconventional velocimetry method is particularly interesting for opaque fluid or rapidly rotating flows, which cannot be imaged ...
Do, Yann, Nataf, Henri-Claude, Cardin, Philippe, Cardin, P, Cébron, David, Vidal, Jérémie, Solazzo, Max, Solazzo, M, Do, Y, Su, Sylvie, Cébron, D, Nataf, H-C, Su, S, Vidal, J   +13 more
core   +1 more source

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Analytical Expression for Sound Transmission Loss Calculation: An Improvement to the Existing Method after Singh and Katra [PDF]

, 2009
An analytical expression for measuring of sound transmission loss (TL) has been developed by using two microphones, an impedance tube and an impulse sound source as a proposed improvement to the existing procedure after Singh and Katra (1978).
Yahya, Iwan
core  

Recent Advances of Slip Sensors for Smart Robotics

Advanced Materials Technologies, EarlyView.
This review summarizes recent progress in robotic slip sensors across mechanical, electrical, thermal, optical, magnetic, and acoustic mechanisms, offering a comprehensive reference for the selection of slip sensors in robotic applications. In addition, current challenges and emerging trends are identified to advance the development of robust, adaptive,
Xingyu Zhang, Liao Wu, Shuai He, Zhao Sha, Yuwan Huang, Shuying Wu, Dewei Chu, Chun H. Wang, Shuhua Peng   +8 more
wiley   +1 more source

Validation and Veri cation of the Acoustic Emission Technique for Structural Health Monitoring [PDF]

, 2013
The performance of the Acoustic Emission (AE) technique was investigated to establish its reliability in detecting and locating fatigue crack damage as well as distinguishing between di erent AE sources in potential SHM applications.
Gagar, Daniel Omatsola
core  

Electrically Tunable Multiwavelength Bragg Grating Filter Acoustically Induced in a Highly Birefringent Suspended Core Fiber

IEEE Photonics Journal, 2017
Multiwavelength reflection spectra induced by an acoustically modulated fiber Bragg grating (FBG) in a highly birefringent suspended core fiber are experimentally investigated. Longitudinal acoustic waves interacting with a grating generate side lobes in
Ricardo E. Silva, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Alexandre A. P. Pohl   +4 more
doaj   +1 more source

Rapid Room‐Temperature Ethanol Sensing in Bi2MoO6/rGO Heterostructures: Weak Adsorption‐Driven Charge Modulation

Advanced Materials Technologies, EarlyView.
This work establishes Bi2MoO6/rGO heterostructures as a mechanism‐guided platform for high‐performance room‐temperature ethanol gas detection by showing that modest adsorption, in conjunction with dynamic interfacial band modulation, enables rapid charge‐transfer.
Sagarika Panda, Savita Mehlawat, Kwanghyeon Jo, Neeraj Dhariwal, Chang Woo Myung, Mohd. Arif, Sung Bum Kang, Amit Sanger   +7 more
wiley   +1 more source

Bioinspired low-frequency material characterisation [PDF]

, 2012
New-coded signals, transmitted by high-sensitivity broadband transducers in the 40–200 kHz range, allow subwavelength material discrimination and thickness determination of polypropylene, polyvinylchloride, and brass samples.
Lovell, Mike, M. A. Lovell (7604717), Rees, J.G., Rees, John, Hopper, Clare, Lovell, M.A., C. Hopper (7604711), O'Leary, R.L., J. G. Rees (7604729), Wilkinson, P.B., P. B. Wilkinson (7604720), D. A. Gunn (7604723), Wilkinson, Paul, Gunn, D.A., Jackson, P.D., Gunn, David, S. Assous (7604714), Assous, S., Hopper, C., P. D. Jackson (7604726), R. L. O'Leary (7604732), O'Leary, Richard, Assous, Said, Jackson, Peter   +23 more
core   +1 more source