A5100763112- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Soil Mechanics
- Seismic Waves and Analysis
- Seismic Performance and Analysis
- Manufacturing Process and Optimization
- Additive Manufacturing and 3D Printing Technologies
- Geophysical Methods and Applications
- Ultrasonics and Acoustic Wave Propagation
- Advanced Numerical Analysis Techniques
- Engineering Applied Research
- Seismic Imaging and Inversion Techniques
- Fluid Dynamics Simulations and Interactions
- Nanomaterials and Printing Technologies
- Grouting, Rheology, and Soil Mechanics
- Neuroscience and Neural Engineering
- Analog and Mixed-Signal Circuit Design
- Stress Responses and Cortisol
- Vibration and Dynamic Analysis
- Structural Health Monitoring Techniques
- Ginseng Biological Effects and Applications
- Geotechnical Engineering and Analysis
- Occupational Health and Performance
- CCD and CMOS Imaging Sensors
- Industrial Vision Systems and Defect Detection
Hanbat National University
2021-2025
Yonsei University
1999-2024
Korea Forest Service
2023-2024
Korea Brain Research Institute
2021-2023
Korea Air Force Academy
2005-2023
Samsung (South Korea)
2022-2023
International St. Mary's Hospital
2023
Korea Advanced Institute of Science and Technology
2012-2022
Inje University Haeundae Paik Hospital
2014-2022
Pukyong National University
2012-2021
Background The efficacy of nitroglycerin (NTG) as a vasodilator is limited by tolerance, which develops shortly after treatment begins. In vascular smooth muscle cells (VSMCs), NTG denitrated to form nitric oxide (NO), activates guanylyl cyclase and generates cGMP. cGMP plays key role in nitrate-induced vasodilation reducing intracellular Ca 2+ concentration. Therefore, one possible mechanism for development nitrate tolerance would be increased activity the phosphodiesterase (PDE), decreases...
In this paper, we report on the noise analysis of low current measurement systems for biomedical applications and their fundamental limits. We analyzed resistive feedback, capacitive feedback amplifier circuits systems. Detailed different are presented matched with data using a 0.5-μm fabrication process. Based theoretical corresponding results, system provides better performance than others. The circuit is capable measuring 750 fA RMS at 10 kHz sampling rate, whereas 4 pA conveyor 600 same...
This paper performed centrifuge load tests of a tripod bucket foundation preliminarily designed as supporting system wind turbines and compared the results to those obtained from test monopod foundation. The prototype studied in this study has three caissons, each which is 6.5 m diameter 8.0 length. center-to-center distance between buckets was 26.9 m. site composed an 11-m thick layer dense silty sand overlying sandy silt layer. horizontal applied at height 33 seabed floor according design...
In this paper we present a fixed window level crossing sampling analog to digital convertor for bio-potential recording sensors. This is the first proposed and fully implemented ADC without local DACs clocks. The circuit designed reduce data size, power, silicon area in future wireless neurophysiological sensor systems. We built testing system measure signals used it evaluate performance of circuit. amplifier offers gain 53 dB within bandwidth 200 Hz-20 kHz. input-referred rms noise 2.8 µV....
The novel drop-on-demand (DOD) solder droplet jetting system, which can be characterized as the non-heat affection of piezoelectric actuator, control mechanism piston head-to-nozzle distance, and disposable nozzle parts, is devised. This system consists insulator, distance apparatus, pressure unit, furnace. For modulation size, from exit controlled by using apparatus. working temperature improved locating actuator outside furnace inserting insulation block between print head actuator. From a...
This paper presents the theoretical and practical details involved with small-signal analysis of switching power converters under a strong influence input filter interaction. A boost dc-to-dc converter controlled by voltage-mode control same current-mode are used as illustrative examples. The predictions this supported experimental results computer simulations
Modafinil is a waking drug prescribed to narcolepsy patients, but its usage among healthy individuals increasing enhance their alertness or mitigate fatigue. This study was conducted investigate practical use and toxic effects on neuro-immune interaction of modafinil.This reviewed the significance psychoactive drugs, discussed benefits risks application modafinil, which seems be ideal as an anti-psychotic anti-fatigue agent.Modafinil known have less no adverse than those found in traditional...
We present a micro-chip implementation of low current measurement system for biomedical applications using capacitive feedback that exhibits 190 fA RMS noise in 1 kHz bandwidth. The sampling rate is selectable up to 100 kHz. When measuring the amplifier with 10 GΩ resistor and 47 pF capacitor at input, typical cell membrane capacitance DNA patch clamp experiments, measured was 2.44 pA on 50 signal Two channels were implemented 630 × 440 μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This paper focuses on the reliability of gravure offset printing and presents a mechanism how width printed line increases repeated printings. Of various process parameters, such as resting times between doctoring, off, set, velocity, pressure, so forth, we investigated effects blanket’s thickness printing. As velocity increases, also increases. is because actual contact time ink blanket decreases, resulting in less solvent absorption into blanket. Printing pressure does not have much...
This paper asserts that shear force plays an important role in the printing mechanism of gravure offset line printing. To end, a theoretical model showing dependence on angle is proposed. The decrement internal between direction and pattern-line increases force, thereby enhancing amount transferred ink off stage. A experiment using widths 80 µm 20 shows width, thickness ink, reflecting effect force. cross-sectional differences lines with width variation greater than µm, which corresponds...
To evaluate the effect of soil-foundation interaction on earthquake response structures, centrifuge tests were performed using an in-flight simulator. The test specimen was composed a single-degree-of-freedom structure model, shallow foundation, and subsoil deposits in container. parameters dynamic period centrifugal acceleration level, type level input accelerations. results showed that lateral forces structures limited by soil-bearing strength (i.e., ultimate moment capacity foundation)...