A5100462804- Korean Urban and Social Studies
- Bone and Dental Protein Studies
- Gas Sensing Nanomaterials and Sensors
- Pharmaceutical and Antibiotic Environmental Impacts
- Modular Robots and Swarm Intelligence
- Marine Biology and Environmental Chemistry
- Urban and spatial planning
- Advanced Chemical Sensor Technologies
- Adhesion, Friction, and Surface Interactions
- Engineering Applied Research
- Radioactive contamination and transfer
- Advanced Sensor and Energy Harvesting Materials
- Additive Manufacturing and 3D Printing Technologies
- Pesticide Exposure and Toxicity
- Cancer Research and Treatments
- Optical Coatings and Gratings
- Bone Metabolism and Diseases
- Bone Tissue Engineering Materials
- Microplastics and Plastic Pollution
- Surface Modification and Superhydrophobicity
- Microfluidic and Capillary Electrophoresis Applications
- Recycling and Waste Management Techniques
- Antibiotic Resistance in Bacteria
- Near-Field Optical Microscopy
- Odor and Emission Control Technologies
Chung-Ang University
2024
Wonik IPS (South Korea)
2024
Korea Atomic Energy Research Institute
2023
University of Southern California
2018-2022
Inha University
2005-2022
Ulsan College
2020
Hannam University
2020
Korea University
2015
G nerve agents are colorless, odorless, and lethal chemical warfare (CWAs). The threat of CWAs, which cause critical damage to humans, continues exist, e.g., in or terrorist attacks. Therefore, it is important be able detect these rapidly with a high degree sensitivity. In this study, surface acoustic wave (SAW) array device three SAW sensors coated different sensing materials one uncoated sensor was tested determine the most suitable material for detection related simulants. used were...
Nanostructured materials synthesized by the hydrothermal and thermal reduction process were tested to detect dimethyl methylphosphonate (DMMP) as a simulant for chemical warfare agents. Manganese oxide nitrogen-doped graphene with polypyrrole (MnO2@NGO/PPy) exhibited sensitivity of 51 Hz 25 ppm DMMP showed selectivity 1.26 Hz/ppm. Nitrogen-doped multi-walled carbon nanotube (N-MWCNT) demonstrated good linearity correlation coefficient 0.997. A comparison between surface acoustic wave quartz...
Recently, efforts have been made to adapt surface acoustic waves (SAWs) for use in chemical sensors detection of warfare agents (CWAs). In this study, a four-channel real-time CWA system was constructed using four 250-MHz SAW sensors. Each consists three different and one reference sensor. The sensor compensates frequency variations according humidity temperature conditions. Signals from the can be checked on PC-based graphical user interface without additional measuring equipment. To...
Charging of the lunar surface induced by solar radiation can potentially threaten in situ resource utilization. Associated issues include dust adhesion and material degradation. Photoelectric currents are primary cause charging. This work reports on development a unit capable measuring photoelectric vacuum chamber, which simulate charging under conditions similar to those moon daytime. The main components mesh grid, photocathode specimen, ring collector. from an aluminum sample were measured...
Abstract A flexible and cost-effective electromechanical device for tactile sensing based on ZnO nanorods (ZnO NRs) grown fabrics is developed. Sensing performance the properties of ethylcellulose/polyurethane-coated NRs fabric substrates were tested by LCR meter, force transducer, vibrator, pulse analyzer. The peak-to-peak output voltage at an applied 21.5 N dropped considerably wool-, nylon-, PP reached to order 3.84 mV, 1.8 mV 4.1 respectively. Furthermore, frequency dependency...
Breaking the total internal reflection far above a critical angle (i.e., outcoupling deep-trap guided modes) can dramatically improve existing light-emitting devices. Here, we report modes outcoupler using densely arranged microstructured hollow cavities. Measurements of leaky mode dispersions hollow-cavity gratings accurately quantify wavelength-dependent strength angle, which is progressively improved over full visible spectrum by increasing packing density. Comparing hollow- and...
본 연구는 공공임대주택 커뮤니티시설 이용 빈도가 임대주택주거만족도에 미치는 영향을 분석하였다. 이를 위하여 2017년 서울시 입주자 패널조사 데이터를 이용하여 회귀분석과 경로분석을 시행하였으며 분석결과는 다음과 같다.<BR>첫째, 커뮤니티 시설의 올라가고 심리적 스트레스가 감소할수록 거주자의 주거만족도가 올라가는 것으로 나타났다. 둘째, 이웃 간의 상호작용과 스트레스는 빈도와 주거만족의 관계에서 매개효과를 보여주었다. 즉 높을수록 이웃과의 교류정도가 통계적으로 유의미하게 증가하고 이는 임대주택주거만족도를 높이는 결과가 관찰되었다. 나아가 개인의 감소하고, 효과를 주었다. 이용은 입주자들의 주거만족도 제고뿐만 아니라, 사회적 관계 형성 및 스트레스 완화에 도움을 준다는 것을 확인할 수 있는 결과였다.
Developing countries struggle with water quality management due to poor infrastructure, limited expertise, and financial constraints. The lack of consistent power further limits the adoption modern facilities. Traditional testing relies on periodic site visits manual sampling by experts. This method is not suitable for continuous, wide-area monitoring because it cannot detect sudden contamination from heavy metal spills, impractical experts visit multiple sites every day over a large area....
It is possible to detect various microplastics (MPs) floating on water or contained in ice due the unique optical characteristics of plastics chemical compositions and structures. When MPs are measured spectral region between 800 1000 nm, which has relatively little influence temperature change water, they frequently perceived as noise obscured by surrounding reflection spectra because small number low intensity representative peak wavelengths. In this study, we have applied several...
Chemical warfare agents (CWAs) are extremely lethal spices of mass destruction even at the low dosages which gives crucial importance to early detection and prevention. As a simulant nerve agent sarin, Dimethyl methylphosphonate (DMMP) can be used because it has non-toxic properties mimics structural composition sarin. In this paper, we summarize CAW by designing surface acoustic wave (SAW) fabrication polyhedral oligomeric silsesquioxane (POSS), thiourea (TU) other hybrid composite...
The development of electronic components is rapidly progressing due to the recent growth technology. As a representative example, wearable devices are being widely studied as next-generation devices. Next-generation require flexible and sophisticated components. Besides, it requires high adhesion between substrate electrical such multilayer printed circuit boards. Various processes have been improve adhesion. method for increasing adhesion, most important factor adhesive, but there...