A5100655395- Surface Modification and Superhydrophobicity
- Engineering Applied Research
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Advanced Sensor and Energy Harvesting Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Copper Interconnects and Reliability
- Nanofabrication and Lithography Techniques
- Internet of Things and Social Network Interactions
- Synthesis and properties of polymers
- Semiconductor materials and devices
- Power Systems and Renewable Energy
- Laser and Thermal Forming Techniques
- Nanomaterials and Printing Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Asian Industrial and Economic Development
- Global trade and economics
- Adhesion, Friction, and Surface Interactions
- Advancements in Photolithography Techniques
- Icing and De-icing Technologies
- High voltage insulation and dielectric phenomena
- Railway Systems and Energy Efficiency
- Psychosocial Factors Impacting Youth
- Social Acceptance of Renewable Energy
Gachon University
2024
Pohang University of Science and Technology
2018-2023
Korea University
2023
Korea Energy Economics Institute
2017-2020
Kyung Hee University
2008
National Health Insurance Service
2004
Goldman Sachs (United States)
2004
Financial Research (Hungary)
2004
Korea Institute of Science and Technology
1995-2003
Korean Association Of Science and Technology Studies
1995-1996
With increasing amounts of oily water discharged from industrial and domestic sources, purifying emulsions using effective eco-friendly methods is great significance. Although functional membranes with selective wettabilities have been extensively explored for the efficient purification oil-in-water emulsions, development that use green inexpensive materials, are simple to fabricate, easy scale up remains very challenging. Herein, we report a approach uses biomass prepare membrane emulsions....
Water waves are a continuously generated renewable source of energy. However, their random motion and low frequency pose significant challenges for harvesting Herein, we propose spherical hybrid triboelectric nanogenerator (SH-TENG) that efficiently harvests the energy frequency, water waves. The SH-TENG converts kinetic wave into solid–solid solid–liquid simultaneously using single electrode. electrical output six degrees freedom in was investigated. Further, order to demonstrate from...
Abstract When processing an area over 500 µm in sample cross-section using ion beam, Ar broad beam (Ar BIB) is used. Place a mask the to be cross sectionized and irradiate BIB on specimen set higher than mask. As cut, section processed form that follows section. In case of commercially available equipment based Si wafer, height within 100 um above mask, milling rate defined as result for 1 h. It generally known during processing, half irradiated remaining processing. However. this study, it...
The use of high stiffness plastics to reduce the weight mechanical systems has been implemented in various industrial fields. As a result, several studies increase adhesion strength metal/polymer joints improve robustness system have reported. In particular, as an alternative existing adhesive bonding methods, research on direct molding method emerged. method, which derives from insert is based fabrication microstructures metal surface create interlocking. this paper new introduced that does...
This study examines the effects of renewable energy expansion policy on Korean economy and industries using computable general equilibrium model, which divides power generation sector into detailed technologies sources. The scenarios are set to observe cases where share solar photovoltaic wind reaches 7%. examined according differing circumstances, such as when greenhouse gas (GHG) emissions regulated, funding source for varies. results show that policies have negative GDP. However,...
Diamond-Like Carbon (DLC) coating is an effective surface treatment method for improving the tribological properties of machine elements and tool materials. Among them, tetrahedral amorphous carbon (ta-C) has recently received much attention due to its high hardness good heat resistance. When characterizing friction wear patterns related lifetime cost, thickness ta-C type substrates play important role. In this paper, coatings two thicknesses are deposited on 304 stainless steel (SS)...
본 연구에서는 유체-고체 연성 배관의 가상센서 시스템을 구성하는 방법을 제안하였으며, 그 신뢰성을 실제 구조물을 대상으로 검증하였다. 제안된 시스템은 계측되지 않은 변위, 압력, 작용하중 등의 응답을 간접적으로 추정할 수 있다. 대상 구조물의 물리적 특성을 모사하기 위해 음향-진동 유한요소 모델을 활용하였으며, 신뢰성 향상을 위하여 모델의 고려한 업데이팅 기법을 적용하였다. 또한 축소모델링 적용하여, 가상 센싱 기법의 실시간 적용이 가능하도록 디지털 트윈 구축하였다. 업데이트 및 축소된 기반으로 시간적분 구조물 전체의 있는 구성하였다. 개발된 기술은 L자형 배관 시험체에서 성능을
환율은 한 나라의 화폐 가격을 다른 단위로 나타낸 것을 말하며, 금리는 그것의 국내 가치를 의미한다. 환율과 수출입품의 가격과 결정해 주는 중요한 역할을 하므로 대외의존도가 높은 우리나라 경제에 있어 매우 하는 변수라 할 수 있다. 본 연구는 수출입과 원/달러 환율, 시중금리 등 경제변수들 간의 관계에 대해 계량적 실증분석을 통해 확인코자 한다. 이를 위해 2001년 1월부터 2023년 11월까지 23년 간, 276개 월별 시중금리를 연구표본과 기간으로 활용했다. 먼저 단위 근검정을 실시해 시계열의 정상성을 확인하고, 이들 인과관계를 확인하기 그랜저인 과관계검정 후 벡터자기회귀함수를 기반으로 충격반응함수를 변수들 동학적 관계를 추정했다. 그 결과 환율변화율의 상승 충격이 가해졌을 때 초기 수출과 수입이 모두 감소하는 모습을 보이는데, 3개월 후부터는 수출이 상대적으로 큰 폭의 증가를 보인 증가하는 순서로 충격의 효과가 일어나는 것으로 나타났다. 이는 환율상승 초기에 수출입...
By every measure, the Asia-Pacific region is extremely important not only for world economy, but Korea as well. Given this importance, paper identifies two major policy issues to be addressed by countries in region. In trade, recent proliferation of regional trading arrangements poses a serious threat continuation economic growth finance, lack capaciry financial system East Asia particular has given rise an unhealthy portfolio assets held Asian countries. The suggestions author include...
We studied the formation of a resist pattern by zero residual layer process with microimprint lithography (MIL) using soft mold. Polyethylene glycol-dimethacrylate as an UV hardening-type and polydimethylsiloxane mold were used for MIL process. The stripe square patterns achieved on Cr/glass. ozone was treated Cr to achieve hydrophilic surface process, which confirmed measurements cross-sectional scanning electron microscopy energy-dispersive X-ray microanalysis.