Search Results - "Ahn, Bongyoung"

Development of length standard phantom for length measurement correction in x-ray image by Cho, Hyo-Min, Lee, Changwoo, Kim, Hojae, Kim, Yong Tae, Shin, Teo Jeon, Ahn, Bongyoung

“…Specific tissue lengths or volumes in x-ray images are measured for diagnostic and therapeutic purposes. Measurements are used to make clinical decisions;…”
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LEGO-compatible modular mapping phantom for magnetic resonance imaging by Cho, Hyo-Min, Hong, Cheolpyo, Lee, Changwoo, Ding, Huanjun, Kim, Taeho, Ahn, Bongyoung

“…Physical phantoms have been widely used for performance evaluation of magnetic resonance imaging (MRI). Although there are many kinds of physical phantoms,…”
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Realization of an ultrathin acoustic lens for subwavelength focusing in the megasonic range by Hyun, Jaeyub, Kim, Yong Tae, Doh, Il, Ahn, Bongyoung, Baik, Kyungmin, Kim, Se-Hwa

“…In this study, we report the first experimental realization of an ultrathin (0.14λ, λ = 1.482 mm means wavelength at 1 MHz in the water medium) subwavelength…”
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A contact-force regulated photoplethysmography (PPG) platform by Sim, Jai Kyoung, Ahn, Bongyoung, Doh, Il

“…A photoplethysmography (PPG) platform integrated with a miniaturized force-regulator is proposed in this study. Because a thermo-pneumatic type regulator…”
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Fabrication and comparison of PMN-PT single crystal, PZT and PZT-based 1-3 composite ultrasonic transducers for NDE applications by Kim, Ki-Bok, Hsu, David K., Ahn, Bongyoung, Kim, Young-Gil, Barnard, Daniel J.

“…This paper describes fabrication and comparison of PMN-PT single crystal, PZT, and PZT-based 1-3 composite ultrasonic transducers for NDE applications. As a…”
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Detection of an axial surface microcrack in steel wire rods with noncontact ultrasonic reverberation spectroscopy by Heo, Taehoon, Cho, Seung Wan, Cho, Seung Hyun, Ahn, Bongyoung, Lim, Zhong Soo

“…In the manufacturing process of steel rod, a number of micro-scale defects occur along the axial direction on the surface of the rods. To prevent failures in…”
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APPARATUS FOR MEASURING PRESSURE USING ACOUSTIC IMPEDANCE VARIATION by Ahn, Bongyoung

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Effect of microstructure of low carbon steels on ultrasonic attenuation by Ahn, B, Lee, S S

“…The ultrasonic attenuation in low carbon steel with 0.04 wt% C to 0.80 wt% C was measured over a frequency range of 5 to 15 MHz, and the effects of the carbon…”
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Development of a simulator for the validation of noninvasive blood pressure-monitoring devices by Doh, Il, Lim, Hyun Kyoon, Ahn, Bongyoung

“…This research aimed to develop a simulator capable of oscillometric pressure pulses recorded from the participants for the validation of oscillometric…”
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Truncated Hollow Cone Probe for Assessing Transepidermal Water Loss and Skin Hardness by Sim, Jai Kyoung, Ahn, Bongyoung, Doh, Il

“…This study proposes a skin analysis device using a truncate hollow cone (THC) probe for measuring both transepidermal water loss (TEWL) and skin hardness…”
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KN.U-K2 International Laboratory Comparison of Ultrasound Power Measurements Emitted from an Ultrasonic Transducer by Kim, Yong Tae, Ahn, Bongyoung, Uchida, Takeyoshi, Elgazery, Mahmoud

“…An international comparison of ultrasound power measurements was conducted among the ultrasound laboratories of the Korea Research Institute of Standards and…”
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Application of the acoustic resonance method to evaluate the grain size of low carbon steels by Ahn, Bongyoung, Seok Lee, Seung, Taik Hong, Soon, Chul Kim, Ho, Kang, Suk-Joong L.

“…The velocities and attenuations of ultrasonic waves in low carbon steels were measured precisely and automatically by the acoustic resonance method using a…”
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Blood pressure differences between a mercury sphygmomanometer and two automatic devices by Lim, Hyun Kyoon, Doh, Il, Ahn, Bongyoung

“…Purpose Blood pressure (BP) is one of the most important pieces of information to diagnose cardiovascular diseases but the measurement readings could be easily…”
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Translocation of microparticles in a fluid-flow by adjusting the operating frequency of ultrasonic standing wave (USW) by Seung Hyun Cho, Ariful Haque Siddique, A. K. M., CheolGi Kim, Bongyoung Ahn

“…Recently, many studies have been reported on the non-contact manipulation of microparticles in a fluid-flow using ultrasound since ultrasonic standing wave…”
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Flow-through separation of microparticles of different sizes using ultrasound by Ariful Haque Siddique, A. K. M., Cho, Seung Hyun, CheolGi Kim, Bongyoung Ahn

“…Recently, many studies have been reported on the separation of microparticles in a fluid-flow using ultrasound since ultrasonic standing wave enables particles…”
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Ultrasonic manipulation of magnetic particles in a microfluidic channel by Siddique, Ariful Haque, Cho, Seung Hyun, Ahn, Bongyoung, Kim, CheolGi

“…In microfludic biosensor applications, many kinds of magnetic particles have been employed due to their bioaffinity property, so the appropriate manipulation…”
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Use of frequency swept ultrasound to manipulate Nb2-11 live cells in a microfluidic channel by Siddique, A. K. M. Ariful Haque, Kim, CheolGi, Cho, Seung Hyun, Ahn, Bongyoung, Yoon, Dong-Jin

“…Recently microfluidic manipulation of live cell has been attracting attention because it is necessary for fast and accurate bioassays of cells within…”
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Ultrasonic flow-through filtration of microparticles in a microfluidic channel using frequency sweep technique by Seo, Dae-Cheol, Ariful Haque Siddique, A. K. M., Ahn, Bongyoung, Kim, Cheol Gi, Cho, Seung Hyun

“…Many studies have been conducted on the filtration of microparticles using the acoustic radiation force of ultrasonic standing wave. The present work concerns…”
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PRACTICAL APPLICATION OF TIP DIFFRACTION TO CRACK SIZING by Young-Gil, Kim, Lee, Seung Seok, Ahn, Bongyoung, Kim, Ki-Bok, Ha, Jung Soo, Park, Sang Gi

“…Tip diffraction method is well known as a very exact sizing technique. Many researches for the technique have been done and several instruments have been…”
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Elastic constants determination of thin cold-rolled stainless steels by dynamic elastic modulus measurements by SEUNG SEOK LEE, MIN, U.-S, AHN, B, SEUNG HYUN YOO

“…Temperature dependence of elastic constants of thin cold-rolled stainless steel has been measured by using the acoustic resonance method. Identification of the…”
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