Results 101 to 110 of about 15,272 (279)

Underwater double vortex generation using 3D printed acoustic lens and field multiplexing

APL Materials
The generation of acoustic vortex beams has attracted an increasing amount of research attention in recent years, offering a range of functions, including acoustic communication, particle manipulation, and biomedical ultrasound.
Chadi Ellouzi, Ali Zabihi, Farhood Aghdasi, Aidan Kayes, Milton Rivera, Jiaxin Zhong, Amir Miri, Chen Shen   +7 more
doaj   +1 more source

Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency

Advances in Condensed Matter Physics, 2018
An acoustic metasurface made of a composite structure of cavity and membrane is proposed and numerically investigated. The target frequency is in the low frequency regime (570 Hz).
Huaijun Chen
doaj   +1 more source

Investigations into the use of quantified Bayesian Maximum Entropy methods to generate improved distribution maps and biomass estimates from fisheries acoustic survey data

, 2008
This thesis describes elements of the assessment and application of Bayesian Maximum Entropy (MaxEnt) image reconstruction techniques for the analysis of fisheries acoustic survey data.
Heywood, Ben G.
core  

Are there morpho‐acoustic patterns of adaptation in nonhuman primate ears? Testing the role of ecology and habitat in shaping ear morphology and function

The Anatomical Record, EarlyView.
Abstract Analysis of the variation in the bony structures of the inner and middle ear provides critical insights into functional morphology, as well as adaptive morphology across primates. In this study, we investigated whether ear morphology patterns are related to the ecological characteristics of species and their habitats to test two acoustic ...
Myriam Marsot, Rémi Laffont, Émilie Steimetz, Patricia Balaresque, Sébastien Couette   +4 more
wiley   +1 more source

Tunable Acoustic Tweezer System for Precise Three-Dimensional Particle Manipulation

Micromachines
This study introduces a tunable acoustic tweezer system designed for precise three-dimensional particle trapping and manipulation. The system utilizes a dual-liquid-layer acoustic lens, which enables the dynamic control of the focal length through the ...
Jiyun Nan, Hiep Xuan Cao, Jong-Oh Park, Eunpyo Choi, Byungjeon Kang   +4 more
doaj   +1 more source

Cataractogenesis after Repeat Laser in situ Keratomileusis

Case Reports in Ophthalmology, 2012
There has been the unsubstantiated clinical impression that laser refractive surgery accelerates cataract development along with solid experimental data about the cataractogenic effects of excimer laser treatment.
Ahmad M. Mansour, Marwan Ghabra
doaj   +1 more source

3D focusing acoustic lens optimization method using multi-factor and multi-level orthogonal test designing theory

, 2020
Focusing systems that consist of acoustic lenses exhibit higher controllability and focusing intensity when manipulating sound waves. Different parameters have different effects on the performance of the acoustic lens, so analyzing a variety of parameter
Zhao, Wei, Peng, Lisha, Wang, Shen, Zou, Juna, Sun, Hongyu, Huang, Songling, Wang, Qing   +6 more
core   +1 more source

Sleep‐trackers in the wild: A faceted taxonomy for information and interaction design

Journal of the Association for Information Science and Technology, EarlyView.
Abstract Consumer‐grade sleep‐tracking technologies (CSTs) have brought sleep into everyday data practices, reframing it from a clinical concern into a site of personal optimization and reflection. Yet existing taxonomies of sleep‐tracking often medicalize users and overlook the complexity of sleep‐tracking technologies. This paper presents SleepTax, a
Sanonda Datta Gupta, Jaime Snyder, John S. Seberger   +2 more
wiley   +1 more source

Opto-acoustic feasibility design of a conical acoustic lens [PDF]

IEEE Journal of Oceanic Engineering, 1978
The opto-acoustic design of a liquid-filled conical acoustic lens is discussed. An approximate model of stacked cylindrical elements is used to estimate the focal line. Final optimization is to be achieved experimentally. Diffraction enables point hydrophones to cover a vertical range of 60\deg .
openaire   +1 more source

Publicly funded private schools and academic achievement: A comparative analysis of PISA data in European countries

British Educational Research Journal, EarlyView.
Abstract This paper analyses differences in academic achievement associated with attendance at publicly funded private schools and public schools across 11 European countries. Using eight waves of PISA data (2000–2022), we apply OLS, IPW and IPWRA estimators to account for observed heterogeneity and mitigate selection bias.
Priya Maurya, Léonard Moulin, Denis Fougère   +2 more
wiley   +1 more source