A5060312810- Welding Techniques and Residual Stresses
- Advanced ceramic materials synthesis
- Conducting polymers and applications
- Aluminum Alloys Composites Properties
- Metal and Thin Film Mechanics
- Advanced Sensor and Energy Harvesting Materials
- Additive Manufacturing Materials and Processes
- Phytochemicals and Antioxidant Activities
- Indoor Air Quality and Microbial Exposure
- Remote Sensing and LiDAR Applications
- Distributed and Parallel Computing Systems
- Advanced Battery Technologies Research
- Food Quality and Safety Studies
- Advancements in Battery Materials
- Ecology and Conservation Studies
- Advanced Battery Materials and Technologies
- Oil Palm Production and Sustainability
- Electrodeposition and Electroless Coatings
- Coastal and Marine Management
- Manufacturing Process and Optimization
- Green IT and Sustainability
- Laser and Thermal Forming Techniques
- Bioactive natural compounds
- Magnesium Oxide Properties and Applications
- Boron and Carbon Nanomaterials Research
Ulsan National Institute of Science and Technology
2023-2025
Anyang University
2022-2024
Hanyang University
2022-2024
Rural Development Administration
2024
National Institute of Animal Science
2024
Chungnam National University
2022-2023
Kumoh National Institute of Technology
2023
University of Suwon
2022
Korea Institute of Materials Science
2021
National Institute of Environmental Research
2020
Irreproducible wrinkling, characterized by randomly arranged ridges or creases on material surfaces, has significant potential for application in entity identification and anti-counterfeiting. However, active research this field is hindered because the existing wrinkling methods face challenges realizing discernible patterns applications of submillimeter-scale wavelength wrinkles are yet to be identified. Herein, we propose a strategy create unique irreproducible...
안전한 천연물을 이용한 천연항산화제 개발 연구에 대한 관심이 고조되는 가운데, 지유, 진피, 천련자, 천문동, 청피, 편축, 하고초 7종의 천연 약용식물 추출물을 통해 항산화 활성을 측정하였다. 추출물의 총 페놀 함량은 지유가 열수추출물과 40% ethanol 추출물에서 각각 31.5 mg/g, 32.7 mg/g으로 가장 높게 나타났다. 수용성 물질에 효과는 DPPH radical 소거능이 약용식물의 열수 추출물과 80% 이상의 높은 소거활성을 나타내었다. ABTS cation decolorization을 측정한 결과, 85% 저해율을 나타내어 매우 우수한 효과를 가지고 있음을 입증하였다. 지용성 측정하기 위해 Antioxidant Protection Factor(PF)를 천련자 1.65 PF로 대조구인 vitamin C 보다 수준을 활성이 높음을 확인하였다. TBARs 생성 결과 하고초의 99%에 가까운 C보다 것으로 확인되었다. In this study, the...
Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.
As a poly (3,4-ethylenedioxythiophene) doped with (styrene sulfonate), PEDOT:PSS is well known for its conductive polymer in field of organic electronics. can be widely operated as electronics under low temperature conditions; however, the layer easily damaged by high conditions, while fabrication or operation Therefore, enhancing thermal stability novel strategy both and operating varieties. Herein, surface-treated tannic acid to increase stability. A large number phenols not only provide...
Asbestos refer to a special form of certain minerals that consists long, thin, crystals (fibers) are particularly strong, flexible, and heat resistant. But, asbestos can cause mesothelioma lung cancer, the use is currently disabled. The objectives this study analyze ambient air soil concentrations at naturally occurring (NOA) areas. Soil quarry beside areas were higher than other Also, spring season 10 times summer season. correlation multiple regression analysis among airborne asbestos,...
A novel three-dimensional two-step numerical model was developed and analyzed for a tandem process with reverse-polarity hot wire. Magneto-hydrodynamic analysis conducted the free surface of molten pool tracked to investigate arc behaviors proposed process, respectively. The results indicated that change in electromagnetic force by wire reduced deflection, which increased velocity co-axial direction electrodes, thereby increasing pressure shear acting on pool. Consequently, wider deeper than...
Steady state visual evoked potential (SSVEP)는 뇌파의 종류 중 하나로서 다른 뇌파에 비해 훈련 시간이 짧고, 비교적 높은 신호대잡음비 (signal-to-noise ratio)와 정보전달량 (information transfer rate)을 가지고 있어서 최근에 뇌-컴퓨터 접속 장치 (brain-computer interface; BCI)에 많이 사용되고 있다. SSVEP 신호를 분석하는 기존 기법에는 전력 스펙트럼 밀도분석 (power spectral density analysis; PSDA)과 정준상관분석 (canonical correlation CCA)이 그러나 PSDA는 단일 전극만을 사용하기 때문에 잡음에 취약한 단점이 있고, CCA는 PSDA보다 정확도를 가지지만 사인-코사인을 기준신호로 가지므로 짧은 시간 윈도우 길이를 가질 경우 실시간 BCI 시스템에 적용되기 어렵다. 따라서 본 논문에서는 기존의 기법들의 한계점을 보완하기...
In the modern society, GIS-based decision support system has been used in evaluating environmental issues and changes due to spatial temporal analysis capabilities of GIS. However without proper manual these systems, its desired goals could not be achieved. this study, audio-visual SWAT tutorial was developed evaluate effectives learning model. Learning effects analyzed after in-class demonstration survey. The survey conducted for 3 rd grade students with/without materials using 30...
The strength evaluation of the most weakest junction part is required for safety design all structures. Most all, in order to enhance reliability and welding part, whose use highest, it very important establish efficient structure manufacturing technology by studying investigating fatigue various environments. This study analyzed relations da/dN, th according methods SMAW, FCAW, SAW. In stage Ⅱ, value stress intensity factor range was highest SMAW method ration R=0.1, appeared under sequence...
Environmental Relative Moldiness Index for Dwellings in
이 논문은 SIMD 구조를 갖는 프로세서에서 FFT 연산을 효과적으로 처리하는 방법에 대한 것이다. FFT는 디지털 신호처리 분야에서 널리 사용되는 범용 알고리즘으로 이의 효과적인 처리는 성능 향상에 있어서 매우 중요하다. Bruun 알고리즘은 반복적인 인수분해를 통해 구현되는 알고리즘으로, Cooley-Tukey 알고리즘에 비해 복소수 곱셈이 아닌 실수 곱셈으로 대부분의 동작을 수행하는 장점을 가지고 있으나, 구현하는 데는 벡터 데이터의 정렬 형태가 복잡하고 연산에 필요한 계수들을 저장할 메모리를 더 필요로 하는 단점이 있다. 실험 결과에 따르면 길이 1024인 수행하는데 비해서 약 1.2배의 높은 처리 성능을 보이지만, 4 배 큰 데이터 한다. 따라서 메모리에 제약이 경우가 아니라면 알고리즘이 적합하다.