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Inaudible airborne ultrasound affects emotional states in the olfactory bulbectomized rat depression model.
Sci Rep
January 2025
Laboratory of Pharmacology, Department of Pharmacy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan.
Recently, exposure to sounds with ultrasound (US) components has been shown to modulate brain activity. However, the effects of US on emotional states remain poorly understood. We previously demonstrated that the olfactory bulbectomized (OBX) rat depression model is suitable for examining the effects of audible sounds on emotionality.
View Article and Find Full Text PDFTiny Machine Learning Implementation for Guided Wave-Based Damage Localization.
Sensors (Basel)
January 2025
Department of Mechanical Engineering, University of Siegen, Paul-Bonatz-Straße 9-11, 57076 Siegen, Germany.
This work leverages ultrasonic guided waves (UGWs) to detect and localize damage in structures using lightweight Artificial Intelligence (AI) models. It investigates the use of machine learning (ML) to train the effects of the damage on UGWs to the model. To reduce the number of trainable parameters, a physical signal processing approach is applied to the raw data before passing the data to the model.
View Article and Find Full Text PDFOptimal Design and Operation of an Ultrasonic Driving System for Algae Removal Considering Underwater Environment Load.
Sensors (Basel)
January 2025
Department of Electric Engineering, Changwon National University, Changwon 51140, Republic of Korea.
This study investigates the optimal design and operation of an underwater ultrasonic system for algae removal, focusing on the electromechanical load of Langevin-type piezoelectric transducers. These piezoelectric transducers, which operate in underwater environments, exhibit variations in electrical-mechanical impedance due to practical environmental factors, such as waterproof molding structures or variations in pressure and flow rates depending on the water depth. To address these challenges, we modeled the underwater load conditions using the finite element method and analyzed the impedance characteristics of the piezoelectric transducer under realistic environmental conditions.
View Article and Find Full Text PDFPartial Discharge Detection from Large Motor Stator Slots Using EFPI Sensors.
Sensors (Basel)
January 2025
School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China.
This study addresses the challenges of electromagnetic interference and unstable signal transmission encountered by traditional sensors in detecting partial discharge (PD) within stator slots of large motors. A novel Extrinsic Fabry-Perot Interferometer (EFPI) sensor with a vibration-coupling air gap was designed to enhance the narrowband resonant detection sensitivity for PD ultrasonic signals by optimizing the diaphragm structure and coupling interface. The sensor features a quartz diaphragm with a thickness of 20 μM, an effective constrained radius of 0.
View Article and Find Full Text PDFUltrasound-Assisted Enzymatic Extraction of the Active Components from Stem and Bioactivity Comparison with .
Molecules
January 2025
Key Laboratory of Forest Plant Ecology of Ministry of Education, Northeast Forestry University, Hexing Road 26, Harbin 150040, China.
(ASC) contains a variety of bioactive compounds and serves as an important traditional Chinese medicinal resource. However, its prolonged growth cycle and reliance on wild populations limit its practical use. To explore the potential of (ASF) as an alternative, this study focused on optimizing the extraction process and assessing the bioactivity of stem extracts.
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