Results 131 to 140 of about 444,257 (298)

Scale-Adaptive Continuous Wavelet Transform for Energy-Envelope Extraction and Instantaneous-Frequency Characterization in High-Resolution Sub-Bottom Profiling

Journal of Marine Science and Engineering
In marine seismic surveys, the indistinguishability of subsurface boundaries caused by the superimposition of the acoustic signals reflected from it, particularly at specific frequency ranges characterized by strong spectral interference, reduces the ...
Doo-Pyo Kim, Sang-Hee Lee, Sung-Bo Kim
doaj   +1 more source

Ultrasound‐Responsive Dual‐Prodrug Nanoassembly for “Fenestrae‐Restoration Strategy” in Liver Fibrosis Therapy

Advanced Materials, EarlyView.
ABSTRACT Liver fibrosis is a serious yet reversible intermediate stage in the progression of liver disease, which can ultimately advance to cirrhosis and hepatocellular carcinoma. Targeted and selective inhibition of activated hepatic stellate cells (aHSCs) has emerged as a promising therapeutic strategy for the treatment of liver fibrosis.
Shutong Liu, Mengyao Zhang, Zitong Qiu, Xinyi Liu, Yunsheng Dou, Sona Krizkova, Zheyi Li, Zbynek Heger, Nan Li   +8 more
wiley   +1 more source

An Energy Focusing Flexible and Lightweight Acoustic Metamaterial for Enhanced Ultrasound Power Transfer

Advanced Materials, EarlyView.
A flexible and lightweight acoustic metamaterial composed of air cavities encased in polydimethylsiloxane (PDMS) is introduced to enhance ultrasound power transfer. The metamaterial leverages the strong reflectivity of air cavity boundaries to concentrate incoming ultrasound, thereby improving the performance of piezoelectric energy harvesters ...
Hyung‐Suk Kwon, Ziqi Yu, Xiaopeng Li, Ercan M. Dede, Taehwa Lee   +4 more
wiley   +1 more source

Predicting Lightweight Powders with Useful Sound Absorption Characteristics from Their Specifications

Applied Sciences
Powders that absorb sound by longitudinal vibration have either a gentle or sharp sound absorption curve at the first absorption peak frequency. Experiments were performed to investigate the conditions under which longitudinal vibration occurs in powders
Shuichi Sakamoto, Keisuke Jindai, Koki Ikeda, Yuya Kawakami, Hiroaki Soeta   +4 more
doaj   +1 more source

Mechanical and Acoustic Properties of Alloys Used for Musical Instruments. [PDF]

Materials (Basel), 2022
Stanciu MD, Cosnita M, Cretu CN, Teodorescu HD, Trandafir M.   +4 more
europepmc   +1 more source

Photochemical Fuel Carrier Molecules for Robotic Embodied Energy

Advanced Materials, EarlyView.
We designed a novel fuel carrier photoresponsive molecule for on‐demand energy storage and release. Carrier molecules undergo bond scission under UV light to release chemical fuel and locally generate propulsive Marangoni flows. We demonstrate this photochemical embodied energy strategy in small‐scale robots and active matter systems, enabling ...
Chuqi Huang, Songah Jeong, Ji Woo Kim, Kanyarat Mantala, Zenghao Zhang, Hyungwoo Kim, Abdon Pena‐Francesch   +6 more
wiley   +1 more source

Cellulose Nanofiber and Nanoclay’s Effect on Acoustic Properties of Oak Wood (Quercus castaneifolia) Finger Joint

BioResources
Finger joints are one of the most important and widely used joints in the wood and wood products industry. The design, type of construction, and the type of glue used, etc., are the most important things in this joint that determine its final quality. In
Babak Ranjbar, Amir Lashgari, Ahmad Jahan-Latibari, Ajang Tajdini   +3 more
doaj  

Study on acoustic properties of hydrate-bearing sediments with reconstructed CO₂ hydrate in different layers during CH₄ hydrate mining. [PDF]

Ultrason Sonochem, 2023
Zhu YJ, Huang X, Li H, Zhu YJ, Wang XH, Sun YF, Xiao P, Sun CY, Chen GJ.   +8 more
europepmc   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

Advanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief, Swagato Sarkar, Anik Kumar Ghosh, Osvalds Verners, Kamal Kumar Meena, Su‐Hyeong Lee, Soosang Chae, Tobias A. F. König, Beate Krause, Andreas Fery, Mehmet Sait Özer, Anindya Nag, Amit Das   +12 more
wiley   +1 more source

Acoustic properties across the human skull. [PDF]

Ultrasonics, 2022
Riis TS, Webb TD, Kubanek J.
europepmc   +1 more source