A5101657504- Electrochemical Analysis and Applications
- Advanced MEMS and NEMS Technologies
- Fatigue and fracture mechanics
- High Temperature Alloys and Creep
- Carbon Nanotubes in Composites
- Mechanical stress and fatigue analysis
- Mechanical and Optical Resonators
- Conducting polymers and applications
- Bone Tissue Engineering Materials
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Fire effects on concrete materials
- Phytase and its Applications
- Electric Vehicles and Infrastructure
- Additive Manufacturing and 3D Printing Technologies
- Machine Fault Diagnosis Techniques
- Thermal properties of materials
- Structural Analysis of Composite Materials
- Histone Deacetylase Inhibitors Research
- Advanced Materials and Mechanics
- Transportation and Mobility Innovations
- Radar Systems and Signal Processing
- Periodontal Regeneration and Treatments
- Advanced Sensor Technologies Research
- Electrical and Thermal Properties of Materials
Jeonbuk National University
2021-2024
Sungkyunkwan University
2024
Inha University
2023-2024
Korea Institute of Industrial Technology
2024
Pusan National University
2020-2023
Gangneung–Wonju National University
2023
South China University of Technology
2008
This study explores the applicability of gas hydrate technology as an innovative approach to fire suppression, focusing on novel use HFC-125a a superior retardant for class B liquid fires. Two sequential steps were performed, involving formation and pelletization with emphasis significance subcooling kinetics. We achieved 15% conversion in 9 min 70% within 19 pelletization. Raman spectra revealed encapsulation large 51264 cages. Flame suppression tests, conducted small pool (lab-scale)...
With increasing concerns about urban pollution, electric vehicles (EVs) have offered an alternative mode of transportation that reduces pollution levels. Previous studies sought to identify the various factors influencing EV charging patterns deploy appropriate infrastructure. However, limited attention has been paid investigation different identified in regions at phases program. This study aims fill this research gap literature by developing binary logistic models account for demands...
Monolayer and multilayer molybdenum disulfide (MoS2) materials are semiconductors with direct/indirect bandgaps of 1.2–1.8 eV attractive due to their changes in response electrical, physicochemical, biological, mechanical factors. Since the desired electrical properties MoS2 known, research on its has increased, focus deposition growth large-area functionalization. While large-scale production is actively underway, there a lack studies functionalization approaches, which essential since...
Currently, silicon-strain-gauge-based diaphragm pressure sensors use four single-gauge chips for high-output sensitivity. However, the four-single-gauge configuration increases number of glass frit bonds and aluminum wire bonds, reducing long-term stability, reliability, yield sensor. In this study, a new design general-purpose silicon strain gauges was developed to improve sensor output voltage while bonds. The consist grid patterns with reciprocating arc piezoresistors on thin backing....
Electricity generation from renewable energy sources is emerging as a result of global carbon emission reduction policies. However, most are non-dispatchable and cannot be adjusted to meet the fluctuating electricity demands society. A flexible operation process has been proposed an effective solution compensate for unstable nature sources. Thermal load fluctuations during may cause creep-fatigue damage high-temperature components thermal power plants, they designed with focus on creep under...
In this study, we analyzed the morphological changes and molecular structure on surface of single-walled carbon nanotube (SWCNT) films during oxygen plasma (O2) etching SWCNT surfaces formed by spray method their potential use as electrochemical electrodes. For purpose, a film was glass substrate using self-made device powder prepared with DCB solvent, SEM, AFM, XPS analyses were performed O2 etched. SEM images AFM measurements showed that started after about 30 s under 50 W irradiation...
Abstract This study deals with the process of developing and optimizing spray coating method for large-area deposition carbon nanotubes. Carbon nanotubes have excellent electrical thermal properties strength, so they are used in various fields application. However, existing methods limitations. In this study, possibility is presented, additional conditions introduced. A solution was prepared using dichlorobenzene as a solvent 3 mg By controlling speed, were optimized by analyzing surface...
Most of the data obtained for motor fault diagnosis is normal motors. Therefore, model trained using collected in field and experiment. In addtion, transfer learning used fast convergence. Fault performance may be reduced by number unbalanced each state during learning. this study, a method mix-up proposed to solve imbalance. A technique adding insufficient with clear decision boundaries, can balance large small fault-state data. The compared GAN, another augmentation. As result experiment,...
Electricity generation from renewable energy sources is emerging as a result of global carbon emission reduction policies. However, most are non-dispatchable and cannot be adjusted to meet the fluctuating electricity demands society. A flexible operation process has been proposed an effective solution compensate for unstable nature sources. Thermal load fluctuations during may cause creep–fatigue damage high-temperature components thermal power plants, they designed with focus on creep under...
Although chemical vapor deposition (CVD) has emerged as an important method for producing large-scale and relatively high-quality graphene, CVD-grown graphene inherently contains grain boundaries (GBs), which degrade its mechanical properties. To compensate these characteristics, various studies have been conducted to maintain the mechanically superior properties by controlling density of defects GBs. In this study, triple junction (TJ)-free polycrystalline is expected exhibit excellent...
Half-bridge silicon strain gauges are widely used in the fabrication of diaphragm-type high-pressure sensors, but some applications, they suffer from low output sensitivity because mounting position constraints. Through a special design and approach, new half-bridge gauge comprising one arc responding to tangential another linear measuring radial was developed using Silicon-on-Glass (SiOG) substrate technology. The consists grid patterns, such as reciprocating piezoresistors on thin glass...
We developed a health-monitoring methodology for high-temperature steam pipes that estimated the life prediction of creep–fatigue interaction by directly measuring displacement hot parts. Three different methods (boiler code, design stress, and operating stress) were used to estimate stress pipe system. As theoretical approach, German boiler standard code calculates according shape, while which is also called allowable was determined function temperature. The immediately calculated using...
Polymer thin-film transistors (PTFTs) based on MEH-PPV semiconductor are fabricated by spin-coating process and characterized. Gate-bias drain-bias stress effects at room temperature observed in the devices. The saturation current decreases threshold voltage shifts toward negative direction upon gate-bias stress. However, increases positive For variable bias conditions, carrier mobility is almost unchanged. results suggest that origin of threshold-voltage shift predominantly associated with...
In this work, we have designed and manufactured radar target simulation equipment for the performance analysis of synthetic aperture radar(SAR) systems. First, explained function specification point scenario generation validation SAR system. addition, developed a simple accurate calibration method time delay system using equipment. We analyzed impulse response image acquired It was observed that measured peak to side lobe ratio(=−13.25 dB) resolution(=0.49 m) are in good agreement with...
온실가스 배출량을 줄이기 위해 공용버스와 트럭의 연료로 액화천연가스가 사용되고 있다. 연료 용기는 외부에 노출되어 있어 충돌에 대한 용기의 안전 여부 판단이 요구된다. 의한 재료의 파손은 자동차 산업뿐만 아니라 다양한 산업에서 중요하게 여겨진다. 본 연구에서는 충돌 실험과 Johnson-Cook 모델을 적용한 수치해석 통해 압력용기의 구조 안정성 평가를 수행하였다. 한국과 미국의 시험 준용 기준을 적용하여 실험을 수치모델의 검증을 정면충돌 조건에서의 실험 결과와 비교를 구축된 유한요소 임계 충돌에너지를 평가하고 이를 바탕으로 건전성을 평가하는 데 활용하였다.