A5100733418- Heat Transfer and Optimization
- Hydrogen Storage and Materials
- Heat Transfer and Boiling Studies
- Ammonia Synthesis and Nitrogen Reduction
- Surface Modification and Superhydrophobicity
- Consumer Perception and Purchasing Behavior
- Crystallization and Solubility Studies
- Advanced Sensor and Energy Harvesting Materials
- Hybrid Renewable Energy Systems
- Nanomaterials and Printing Technologies
- Fluid Dynamics and Heat Transfer
- Climate change and permafrost
- Electric and Hybrid Vehicle Technologies
- Carbon Nanotubes in Composites
- Structural Health Monitoring Techniques
- Korean Urban and Social Studies
- Structural Behavior of Reinforced Concrete
- Engine and Fuel Emissions
- Thermal Radiation and Cooling Technologies
- Advanced Combustion Engine Technologies
- Diverse Topics in Contemporary Research
- Masonry and Concrete Structural Analysis
- Cultural and Historical Studies
- Advanced machining processes and optimization
- Seismic Performance and Analysis
Inha University
2022-2024
Ewha Womans University
2022-2024
Korea Advanced Institute of Science and Technology
2020-2023
University of Alaska Fairbanks
2011-2023
Chungnam National University
2015-2020
Kwangwoon University
2020
University of Alaska System
2014
University of Nevada, Reno
2009-2011
Green Technology
2009
Duke University
2006-2008
A mathematical model is developed to represent and predict the dropwise condensation phenomenon on nonwetting surfaces having hydrophobic or superhydrophobic (contact angle greater than 150 deg) features. The established by synthesizing heat transfer through a single droplet with drop size distribution. analyzed as combination of vapor-liquid interfacial resistance, resistance due conduction itself, from coating layer, curvature drop. population balance adapted develop distribution function...
Polydopamine (PDA) is a promising melanin-like material with unique properties such as hybrid electronic–ionic conductivity, UV–vis light absorption, wet adhesion, biocompatibility, anti-inflammation, and metal ion chelation. Despite its versatility, PDA has limited utilization in bioelectronics due to low electrochemical conductivity. Here, we present an synthesis for highly conductive composites directly coated on Au electrodes. was deposited by the confined oxidizing effect of dissolved...
A brake disc decelerates the vehicle through friction with pads. When system is overheated, fade can occur, in which coefficient drops significantly. Additionally, an over-heated may cause vapor lock, hydraulic fluid vaporized. These phenomena lead to loss of braking power and a fatal accident. Therefore, systems must have stable heat dissipation performance. Having through-holes slits on surface rotor has been adopted improve performance, but holes become stress points potentially cracks....
In this paper, it will be examined whether there were differences in the lengths of long axis Neolithic and Bronze Age dwellings found Seoul, Incheon, Gyeonggi-province (the midwestern part Korean Peninsula), locations residential agricultural sites from each era their relationships with soils related to agriculture areas where site is located, thereby attempting infer background social characteristics emergence Thin-rectangular houses. As a result, average period (450.52 cm) (838.68 showed...
In this paper, we introduce a 2-D microelectromechanical systems scanner for 3.2-mm-diameter dual-axis confocal microendoscopes, fabricated exclusively by front-side processing. Compared to conventional bulk micromachining that incorporates back-side etching, the process is simple and thus enables high device yield. By eliminating etch window, yields compact robust structures facilitate handling packaging. An important component of our front- side fabrication low-power deep reactive ion...
Abstract Virgin injection‐molded tensile specimens without any inserted film and four kinds of insert molded (FIM) were prepared. They annealed at 80°C to investigate the effect residual stresses thermal shrinkage on deformation specimens. The FIM with unannealed bent after ejection in such a way that side was protruded warpage reversed gradually during annealing intruded. Warpage specimen for 20 days not annealing. Processing have been modeled numerically predict thermoviscoelastic part...
Metal hydride alloys are considered as a promising alternative to conventional hydrogen storage cylinders and mechanical compressors. Compared storing in classic gas tank, metal can store at nearly room pressure use less volume the same amount of hydrogen. However, this method necessitates an effective way reject heat released from exothermic hydriding reaction. In paper, finned conductive insert is adopted improve transfer cylindrical reactor. The fins collect that volumetrically generated...
Dual stage hydrogen compressor with high pressure compression ability can operate efficiently using geothermal, low temperature solar, waste energy as well combination of these sources. In this study, a dual thermal system for was investigated three different storage materials: LaNi5, Ca0.6Mm0.4Ni5 and Ca0.2Mm0.8Ni5. Compression ratio Ca0.2Mm0.8Ni5 found to be 56% 14.7% higher than those LaNi5 respectively, single inlet supply 600 psig. On the other hand, performance similar that at (e.g....
Research into the fire resistance of structural concrete in South Korea has been ongoing since 2000 and incorporates studies on materials, columns, construction methods finishing materials. Recently, experiments analytical have undertaken to include diverse materials structures for resistance. Based results these studies, Korean government recognised need performance criteria legal fire-resistant published Regulations Egress/Fire Protection Construction 2015. In light this previous work,...
As the world is keen on cleaner and sustainable energy, hydrogen energy has potential to be part of green transition replace fossil fuels mitigate climate change. However, storage a difficult task since physical in form compressed gas under high pressure associated with safety issues. Another material-based storage, which safest way store particulate matter, known as metal hydrides. Metal hydrides can at room temperature use less volume same amount compared classical tanks. The challenges...
There have been many attempts to enhance heat transfer during the condensation (vapor liquid) process since is a critical mechanism in industrial processes. One conventional method of enhancing specially treat condensing exchanger surface adequately promote so-called "dropwise" condensation. Biomimetically constructed coating with hydrophobic materials often employed for treatment. This on effectively shifts mode from filmwise (the mode) dropwise (similar lotus leaves?), resulting much...
Thermal conduction capability of metal hydrides can be enhanced by 400 ~ 500% through pelletizing the hydride powder after a well-controlled copper-coating treatment. In this paper, pelletized LaNi5 is studied to evaluate its heat transfer performance and hydrogen absorption rate. order analyze transient hydriding reaction, numerical simulations are carried out based on multiple-physics modeling. The reactor temperature variation dimensionless mass absorbed plotted for different gas supply...