A5100675081- Advanced Sensor and Energy Harvesting Materials
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Marine and coastal plant biology
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Marine and Coastal Research
- Particle Accelerators and Free-Electron Lasers
- Ecology and Conservation Studies
- Fluid Dynamics and Turbulent Flows
- Plasma and Flow Control in Aerodynamics
- Sports injuries and prevention
- Advanced Chemical Sensor Technologies
- Lower Extremity Biomechanics and Pathologies
- Magnetic confinement fusion research
- ECG Monitoring and Analysis
- Liver Disease Diagnosis and Treatment
- Perovskite Materials and Applications
- Aerodynamics and Fluid Dynamics Research
- Acute Ischemic Stroke Management
- Cardiac Imaging and Diagnostics
- Agriculture, Soil, Plant Science
- Non-Invasive Vital Sign Monitoring
- Analytical Chemistry and Sensors
- Cardiac Structural Anomalies and Repair
University of Utah
2015-2025
Sejong General Hospital
2023
Sungkyunkwan University
2017-2021
Kangbuk Samsung Hospital
2018-2021
Samsung Medical Center
2017-2020
OriGene (United States)
2020
Kyung Hee University
2015-2017
Chungnam National University
2014-2016
Korea Institute of Science and Technology
2016
Samsung (South Korea)
2015
We report high-performance flexible nanogenerators (NGs) based on a composite thin film, composed of hemispherically aggregated BaTiO3 nanoparticles (NPs) and poly(vinylidene fluoride-co-hexafluoropropene) P(VDF-HFP). The hemispherical BTO–P(VDF-HFP) clusters were realized by solvent evaporation method, which greatly enhanced piezoelectric power generation. NGs exhibit high electrical output up to ∼75 V ∼15 μA at the applied force normal surface, indicating important role BTO clusters....
Two different materials, apart from each other in a triboelectric series, are required to fabricate high performance generators (TEGs). Thus, it often limits the choices of materials and causes related processing issues for TEGs. To address this issue, we report simple surface functionalization method that can effectively change charging sequence broadening material enhancing Specifically, functionalized surfaces polyethylene terephthalate (PET) films either with poly-l-lysine solution or...
We present a method to develop high performance flexible piezoelectric nanogenerators (NGs) by employing Li-doped ZnO nanowires (NWs). synthesized NWs and adopted them replace intrinsic with relatively low coefficient. When we exploited the ferroelectric phase transition induced in NWs, of NGs was significantly improved NG fabrication process greatly simplified. In addition, our approach can be easily expanded for large-scale fabrication. Consequently, fabricated simple exhibit excelling...
Palladium (Pd)-based hydrogen (H₂) gas sensors have been widely investigated thanks to its fast reaction and high sensitivity hydrogen. Various sensing mechanisms adopted for H₂ sensors; however, all the must be powered through an external battery. We report here sensor that can detect by measuring output voltages generated during contact electrification between two friction surfaces. When sensor, composed of Pd-coated ITO (indium tin oxide) PET (polyethylene Terephthalate) film, is exposed...
We report on an optimal BaTiO3-P(VDF-HFP) composite thin-film formation process for high performance piezoelectric nanogenerators (NGs). By examining different solvent ratios in a solvent-assisted thin film process, the BTO nanoparticle (NPs) clustering and related enhancements were carefully investigated. Using fabricated NGs exhibited excelling output power performance. Under compressive force of ∼0.23 MPa normal to surface, measured open-circuit voltage short-circuit current over 110 V 22...
Titanium dioxide (TiO 2 ) nanostructures exhibit diverse morphologies depending on synthesis conditions. This study investigates the effects of varying anodization parameters TiO nanotubes, nanograss, and nanolace formation. Field‐emission scanning electron microscopy is employed to analyze these nanostructures’ morphology growth rates. The structural characteristics resulting are precisely controlled by adjusting temperature, water content, duration, applied potential during process....
서 론 한국 동해안의 해조류에 대한 연구는 Okamura(1915a, b) 에 의해 동해안에 분포하는 해조류가 처음으로 보고된 이래, Kang(1966)은 한국산 해조류의 지리적 분포를 논하면서 동 해안 일대를 동해안 북부와 중남부로 나누고, 출현하는 해조류 196종(남조식물 3종, 녹조식물 25종, 갈 조식물 48종, 홍조식물 120종)의 목록을 정리한 바 있다.이 후 1980년대에 들어 생태적 특 성이 본격적으로 밝혀지기
[Purpose] The purpose of this study was to analyze the effects different shoe types on lower extremity muscle activity in healthy young women by using electromyography. [Subjects and Methods] Fifteen their 20s were included single-group repeated measures study. subjects divided into three groups: Converse sneakers, rain boots, combat boots. walked a treadmill at 4 km/h for 30 min, during which six muscles examined electromyography: rectus femoris, vastus medialis, semimembranosus, tibialis...
따라서 연안생태계에서 고착성 해조류가 차지하는 역할과 중요성을 이해하고 나아가서 지역별 분포 양상과 생산력을 비교 고찰 하기 위해서는 해조류의 생물량과 생물량을 구성하는 주요 종을 이해하는 것이 중요하다고 판단된다
In this work we present a miniaturized electronic nose (E-Nose) sensor platform made by integrating film bulk acoustic resonators (FBARs) with arrays of CMOS oscillators. Each the FBARs in array is chemically activated to differing vapors (odors) after depositing variety polymers on active areas resonators. To simulate detection primary indoor pollutants, experimental results polymer-gas interaction between 6 different coating and various solvents. Chemical selectivity proved highly...
This paper reports a massively integrated Δ-Σ ADC based mixed signal chipset for handheld Wireless Ultrasound imaging system. The IC has been fabricated in standard 0.13 μm 1.5V 7M2F CMOS process with 128 parallel channels containing Delta-Sigma (Δ-Σ) ADCs, Anti-aliasing filter, Decimation filters, Serializers and LVDS drivers. entire chip is SPI controlled allows group-level power control through an FPGA. measures 15 × mm dissipates around ~ 4.6 W of power, 12-bit resolution at 20 Msps...
Slag foaming directly affects the productivity and quality of steel during electric arc furnace (EAF) process. Therefore, slag height needs to be monitored in real-time. However, direct measurement is difficult achieve because inside EAF consists harsh environments, i.e., high temperature presence gas dust. A stepwise regression model was created using sensor data from EAF. total 272 operational sets process were used develop validate model. This came 140ton DC-EAF Dongkuk Steel Pohang,...
This study is intended to clarify the effects of heated effluents on intertidal benthic marine algal community in Korea. The species composition and biomass algae at discharge canal Gori nuclear power plant southeastern coast Korea were investigated seasonally from February 2001 October 2006. As a result, 54 (7 blue-green, 12 green, 9 brown 26 red algae) found during past six years. In general, number observed was abundant winter spring less autumn. Enteromorpha compressa, E. intestinalis,...
Extracorporeal life support (ECLS) is used as a bridge to revascularization in high-risk patients with ischemic heart disease. We reviewed our experiences of coronary artery bypass grafting (CABG) after ECLS cardiac arrest or refractory cardiogenic shock.We retrospectively 4,616 who underwent CABG at institution between May 2006 and February 2017. identified following for shock arrest. Twenty-three (0.5% all cases) were enrolled the analysis. Their median age was 65 years (Q1-Q3, 58-77...
A rectangular orifice synthetic jet may be an effective means of generating longitudinal embedded vortices within low Reynolds number boundary layers for flow control. There is relatively little data available relating to the characteristics as a function key geometric parameters. series experimental measurements using modular are reported in which length and resonance cavity depth varied single diaphragm system operating at optimum excitation frequency. The maximum time averaged velocity...
The application fields of intense gamma-rays or X-rays for industrial purposes are expanding. An electron beam accelerator which can generate whose dose rate is equivalent to the effect a several MCi gamma-ray source major candidate as an X-ray source. 10 MeV, 100 kW CW Fantron-I conceptually designed irradiate food, corn, forest products and so on. Electrons accelerated seventeen times through two coaxial cavities with TM010 mode by means bending magnet located outside cavity. resonant...
In order to clarify the structure and seasonal dynamics of warm tolerant benthic marine algal community in Korea, species composition biomass algae at discharge canal Uljin nuclear power plant on East Coast Korea were investigated seasonally from February 1992 October 2000. 107 found during past nine years. general, number observed was abundant spring or summer less autumn winter. 27 (4 blue-green, 5 green, 6 brown 12 red algae) occurred more than 1/ frequency thus can be categorized as...
High temperature solution phase decomposition of Fe(CO)5 and reduction Pt(acac)2 in the presence stabilizers oleic acid oleyl amine are employed to produce Fe(1-x)Pt(x) alloy nanoparticles. The Fe Pt composition nanosized materials can be tuned by adjusting molar ratio Pt(acac)2, compositions ranging from Fe40Pt60 Fe80Pt20 obtained. This study is investigate influence on Curie (Tc) nanoparticles monitored thermomagnetic analysis (TMA).