A5030316021- Underwater Acoustics Research
- Geophysical Methods and Applications
- Microwave Imaging and Scattering Analysis
- Acoustic Wave Phenomena Research
- Semiconductor materials and interfaces
- Silicon Nanostructures and Photoluminescence
- Nanoparticles: synthesis and applications
- Trace Elements in Health
- Hydrology and Sediment Transport Processes
- Ocean Waves and Remote Sensing
- Orthopedic Infections and Treatments
- IoT and Edge/Fog Computing
- Semiconductor materials and devices
- Blockchain Technology Applications and Security
- Lattice Boltzmann Simulation Studies
- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Mixing
- Currency Recognition and Detection
- Ultrasonics and Acoustic Wave Propagation
- Oil Spill Detection and Mitigation
National Cheng Kung University
2019-2024
National Pingtung University
2023
National Yang Ming Chiao Tung University
2020
National Taipei University
2017
Self-checkout systems enable retailers to reduce costs and customers process their purchases quickly without waiting in queues. However, existing self-checkout suffer from design problems as they require large hardware consisting of a camera, sensors, RFID other IoT technologies which increases the cost such systems. Therefore, we propose smart shopping cart with self-checkout, called iCart, improve customer's experience at retail stores by enabling just walk out checkout overcome...
In this study, we developed a fiber-optic sensing system with an eight-probe array for measuring the spatial distributions of air volume (void) fractions in bubbly flows. Initially, performed calibration experiments cylindrical tank by using single probe to determine relationship between time fraction ratio bubble signals and void fractions. A high correlation coefficient was obtained fraction, suggesting that proposed can measure local up 18%. Subsequently, used distribution flow caused...
Bubble entrainment caused by and underwater sound produced a single water drop falling on the surface of freshwater saltwater were experimentally investigated in this study. A charge-coupled device camera was employed to photograph drop's impact process bubble formation. Underwater received using hydrophone connected charge amplifier data-acquisition system. To capture temporal spectral characteristics sound, time series transformed into time–frequency domain Gabor transform. The diameter...
This study investigates the performance of a passive time-reversal mirror (TRM) combined with acoustic ray theory in localizing underwater sound sources high frequencies (3-7 kHz). The TRM was installed on floating buoy and comprised four hydrophones. ray-tracing code BELLHOP used to determine transfer function between source field point. frequency domain obtained from transformed into time domain. pressure then by taking convolution time-reversed signals that were received hydrophones TRM....
A high power oscillation occurring on a porous silicon diode with an obvious dc N-shaped negative differential resistance (NDR) at room temperature is presented for the first time. The voltage swing was up to 12.4 V and frequency 101.3 kHz, which belongs radio range. based superlattice structure, observed provide stable NDR peak-to-valley current ratio as 7.9 current-voltage characteristics temperature. structure formed by electrochemical etching method n-type (100) wafer alternating...
Staphylococcus aureus (S. aureus)forms biofilm that causes periprosthetic joint infections and osteomyelitis (OM) which are the intractable health problems in clinics. The silver-containing nanoparticles (AgNPs) antibacterial nanomaterials with less cytotoxicity than classic Ag compounds. Likewise, gold (AuNPs) have also been demonstrated as excellent for medical applications. Previous studies showed both AgNPs AuNPs anti-microbial or anti-inflammatory properties. We developed a novel green...
In this study, a pressurized, water-filled impedance tube (WFIT) was developed to measure the reflection coefficients of sound-absorbing materials under various hydrostatic pressures. The WFIT calibrated using two-microphone, three-parameter calibration method (3PCM). accuracy and repeatability measured for water-air interface in were determined by comparing these with corresponding theoretical coefficients. then used acoustic coefficient porous rubber specimen on three dates, measurement...
Taiwan is located in a crucial strategic area, surrounded by the quick-change ocean, and what remains elusive underwater acoustic environment. To discover moving targets, detection of sound very important as well location tracking targets. Although frequency characteristics specific target certain, affected diffraction reflection, signals could have possible aliasing. In order to restore signals, source needed. It's common place hydrophones wires at bottom sea detect but cost enormous...