Results 121 to 130 of about 440,511 (349)
Applied SciencesThe seismic image produced by pre-stack depth migration is more accurate and has clearer geological significance than the time image. However, the waveform of the depth-domain seismic image is affected not only by depth-dependent velocity variation but ...
Chengyu Sun, Ruiqian Cai, Zhen’an Yao
doaj +1 more source
[Acoustic impedance tests in persons exposed to the harmful effect of noise].
Otolaryngologia polska = The Polish otolaryngology, 1981 Danuta Zbrowska-Bielska
openaire +2 more sources
Carbon Fiber Reinforced Thermoplastics: From Materials to Manufacturing and Applications
Advanced Materials, EarlyView.A contemporary and critical review on carbon fiber reinforced thermoplastics. The common thermoplastic and carbon fiber applied in the manufacture of carbon fiber reinforced thermoplastics are summarized, and the processing and postprocessing methods are reviewed, with emphasis on state‐of‐the‐art welding techniques.
Howard (Hao) Wang +6 more
wiley +1 more source
Estudo das medidas de imitância acústica com tom sonda de 226 e 1000 Hz em neonatos
Audiology: Communication ResearchOBJETIVO: Estudar as medidas de volume, pressão do pico e complacência obtidas nas curvas timpanométricas de neonatos, na comparação entre gêneros e orelhas, utilizando tom sonda de 226 e 1000 Hz, e analisar as respostas obtidas na pesquisa dos reflexos ...
Bruna Noronha Teixeira +3 more
doaj
, 2017 Three perforate-over-honeycomb liner configurations, one uniform and two with spanwise variable impedance, are evaluated based on tests conducted in the NASA Grazing Flow Impedance Tube (GFIT) with a plane-wave source.
Michael G. Jones +3 more
semanticscholar +1 more source
A PDMS-based broadband acoustic impedance matched material for underwater applications [PDF]
arXiv, 2018 Having a material that is matched in acoustic impedance with the surrounding medium is a considerable asset for many underwater acoustic applications. In this work, impedance matching is achieved by dispersing small, deeply subwavelength sized particles in a soft matrix, and the appropriate concentration is determined with the help of Coherent ...
arxiv
Electric Field Driven Soft Morphing Matter
Advanced Materials, EarlyView.This study presents soft morphing matter robots that exhibit extremely high morphological adaptability and complex multimodal electric field response. They can undergo large, controlled body deformation and show complex locomotion on different terrains under the manipulation of external electric fields, making a significant step beyond current ...
Ciqun Xu +3 more
wiley +1 more source
Gravitational Wave Detection with High Frequency Phonon Trapping Acoustic Cavities [PDF]
, 2014 There are a number of theoretical predictions for astrophysical and cosmological objects, which emit high frequency ($10^6-10^9$~Hz) Gravitation Waves (GW) or contribute somehow to the stochastic high frequency GW background.
Goryachev, Maxim, Tobar, Michael E.
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Advanced Materials, EarlyView.Biomechanical‐to‐electrical energy conversion devices are uniquely suited for self‐driven physiological information monitoring and powering human–computer interaction systems. These devices based on micro‐/nanoarchitectured inorganic dielectric materials (MNIDMs) have shown ultrahigh electromechanical performance and thus great potential for practical ...
Jia‐Han Zhang +12 more
wiley +1 more source
Jornal de Pediatria, 2005 OBJETIVO: O presente estudo objetivou avaliar a ocorrência e recorrência de secreção na orelha média e os possíveis fatores associados, em 190 recém-nascidos e lactentes observados nos 2 primeiros anos de vida, participantes de um programa de prevenção ...
Sandra de O. Saes +2 more
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