Results 21 to 30 of about 11,711 (254)

Air-Coupled Low Frequency Ultrasonic Transducers and Arrays with PMN-32%PT Piezoelectric Crystals

Sensors, 2017
Air-coupled ultrasonic techniques are being increasingly used for material characterization, non-destructive evaluation of composite materials using guided waves as well as for distance measurements.
Rymantas J. Kazys, Reimondas Sliteris, Justina Sestoke   +2 more
doaj   +1 more source

DESIGN OF INNOVATIVE MEASUREMENT SYSTEMS IN ULTRASONIC TOMOGRAPHY

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2022
The article describes the progress of construction and research works on ultrasound tomography. The devices allow for non-invasive measurements of various objects using ultrasonic low and high-frequency transducers.
Michał Gołąbek, Tomasz Rymarczyk
doaj   +1 more source

Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

AIP Advances, 2016
Ultrasonic thermometry is a kind of acoustic pyrometry and it has been evolving as a new temperature measurement technology for various environment. However, the accurate measurement of the ultrasonic time-of-flight is the key for ultrasonic thermometry.
Ruixi Jia, Qingyu Xiong, Lijie Wang, Kai Wang, Xuehua Shen, Shan Liang, Xin Shi   +6 more
doaj   +1 more source

Magnesium Alloy Matching Layer for High-Performance Transducer Applications

Sensors, 2018
In this paper, we report the use of magnesium alloy (AZ31B) as the matching material for PZT-5H ultrasonic transducers. The AZ31B has an acoustic impedance of 10.3 MRayl, which provides a good acoustic impedance match for PZT-5H ultrasonic transducers in
Yulei Wang, Jingya Tao, Feifei Guo, Shiyang Li, Xingyi Huang, Jie Dong, Wenwu Cao   +6 more
doaj   +1 more source

Study on the nonlinear characteristic of a longitudinal piezoelectric ultrasound transducer with stepped horn

Ultrasonics Sonochemistry
Longitudinal vibration sandwich piezoelectric transducers with a stepped horn are widely used in high-intensity ultrasonic applications such as ultrasonic welding, ultrasonic machining, and ultrasonic cleaning. In these applications, due to the increased
Zhongji Yang, Long Xu, Haidao Zhang, Tao Gong, Zhaofeng Liang, Lei Yao   +5 more
doaj   +1 more source

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source

Somatostatin receptor 4 (SSTR4) is a tumor suppressor in cutaneous and head & neck squamous cell carcinomas

Molecular Oncology, EarlyView.
This study identifies somatostatin receptor 4 (Sstr4) as a critical tumor suppressor against skin and head/neck cancers (HNSCC, cSCC, and BCC). The loss of Sstr4 removes a check on cell growth, causing hyperactivation of the MAPK‐ERK signaling pathway (↑).
Ali Taqvi, Tuan Khang Huynh, Adway Kadam, Zahra Kardan, Yue Yan, Amina Jamal Laham, Sampath Kumar Loganathan   +6 more
wiley   +1 more source

The Acoustic Field Distribution Inside the Ultrasonic Ring Array

Archives of Acoustics, 2018
This paper presents and analyses the results of a simulation of the acoustic field distribution in sectors of a 1024-element ring array, intended for the diagnosis of female breast tissue with the use of ultrasonic tomography.
Wiktor STASZEWSKI, Tadeusz GUDRA, Krzysztof J. OPIELINSKI   +2 more
doaj   +1 more source

Early‐life high‐fat diet exposure increases Achilles tendon stiffness and induces transcriptomic alterations

FEBS Open Bio, EarlyView.
Early‐life exposure to a high‐fat diet altered intact Achilles tendons in rat offspring, making them thinner, stiffer, and molecularly distinct even without injury. These findings suggest that developmental high‐fat diet exposure may impair tendon quality and increase susceptibility to mechanical overload or tendon injury later in life.
Heyong Yin, Ziyang Yuan, Wenli Jiang, Ai Guo   +3 more
wiley   +1 more source

The Effect of Dynamic Beam Deflection and Focus Shift on the Acoustic Field Distribution Inside the Ultrasonic Ring Array

Archives of Acoustics, 2019
This paper presents the results of acoustic field distribution simulations for the 1024-element ultrasonic ring array intended for the diagnosis of female breast tissue with the use of ultrasound tomography.
Wiktor STASZEWSKI, Tadeusz GUDRA, Krzysztof J. OPIELIŃSKI   +2 more
doaj   +1 more source