Yoon-Hee Kang

Surface modification of and selective protein attachment to a flexible microarray pattern using atmospheric plasma with a reactive gas.

The hydrophobic and hydrophilic properties of the surface of poly-ether sulfone (PES) films were controlled by an atmospheric pressure plasma (AP) treatment using reactive gases (Ar/H(2) and Ar/O(2)). The surface properties of the Ar/H(2) and Ar/O(2) in series AP-treated PES films showed higher surface roughness (approximately 120%), surface energy (approximately 30%) and hydrophilic properties (oxygen content approximately 10%) than the Ar/O(2) AP-treated PES film. The protein staining results confirmed that an activated region on the patterned PES film with high selectivity and sensitivity was well-defined and formed. This method is suitable for fabricating flexible protein adhesive chips with uniform biomolecular adhesive properties.

High-resolution Simulation of Meteorological Fields over the Coastal Area with Urban Buildings

A meso-urban meteorological model (Urbanized MM5; uMM5) with urban canopy parameterization (UCP) was applied to the high-resolution simulation of meteorological fields in a complex coastal urban area and the assessment of urban impacts. Multi-scale simulations with the uMM5 in the innermost domain (1-km resolution) covering the Busan metropolitan region were performed during a typical sea breeze episode (4~8 August 2006) with detailed fine-resolution inputs (urban morphology, land-use/land-cover sub-grid distribution, and high-quality digital elevation model data sets). An additional simulation using the standard MM5 was also conducted to identify the effects of urban surface properties under urban meteorological conditions. Results showed that the uMM5 reproduced well the urban thermal and dynamic environment and captured well the observed feature of sea breeze. When comparison with simulations of the standard MM5, it was found that the uMM5 better reproduced urban impacts on temperature (especially at nighttime) and urban wind flows: roughness-induced deceleration and UHI (Urban Heat Island)-induced convergence.

Modeling of the Air Pollutant Recirculation using the MM5-CAMx on Ozone Episode in Greater Seoul Area during June, 2004

Recent evidence has demonstrated that the pollutant recirculation can play an important role in leading to high ozone concentrations. In this study, the MM5-CAMx air quality modeling system was applied to simulate the pollutant recirculation and identify the transport of pollution during the high event (the maximum of 195 ppb) observed in the Greater Seoul Area (GSA) on June in 2004. The results showed a weak northeasterly synoptic wind during the night and early morning moved the air parcels containing the locally emitted urban pollution to the coast, which contributed to enhance formation in the southwest part of the GSA. As the sea breeze developed and started to penetrate inland in the late afternoon, the rapid build-up of concentration was found in the southwest coastal area due to the recirculation of the polluted air loaded with high level . The simulated backward trajectories and observations at coastal sites confirmed the recirculation of pollutant with the late sea breeze is the dominant factor affecting the occurrence of high concentrations in the southwestern GSA.

Atmospheric Dispersion of Radioactive Material according to the Local Wind Patterns around the Kori Nuclear Power Plant using WRF/HYSPLIT Model

【The characteristics of atmospheric dispersion of radioactive material (i.e.

Modeling the Impacts of Increased Urbanization on Local Meteorology in the Greater Seoul Area

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Seasonal Characteristics of Sea Surface Winds and Significant Wave Heights Observed Marine Meterological Buoys and Lighthouse AWSs near the Korean Peninsula

) related to local wind patterns around the Kori nuclear power plant (KNPP) were studied using WRF/HYSPLIT model. The cluster analysis using observed winds from 28 weather stations during a year (2012) was performed in order to obtain representative local wind patterns. The cluster analysis identified eight local wind patterns (P1, P2, P3, P4-1, P4-2, P4-3, P4-4, P4-5) over the KNPP region. P1, P2 and P3 accounted for 14.5%, 27.0% and 14.5%, respectively. Both P1 and P2 are related to westerly/northwesterly synoptic flows in winter and P3 includes the Changma or typhoons days. The simulations of P1, P2 and P3 with high wind velocities and constant wind directions show that

Influence of Isoprene Emissions on Ozone Concentrations in the Greater Busan Area during a High Ozone Episode in 2006

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WRF Modeling Approach for Improvement of Air Quality Modeling in the Seoul Metropolitan Region: Seasonal Sensitivity Analysis of the WRF Physics Options

emitted from the KNPP during 0900~1400 LST (Local Standard Time) are dispersed to the east sea, southeast sea and southwestern inland, respectively. On the other hands, 5 sub-category of P4 have various local wind distributions under weak synoptic forcing and accounted for less than 10% of all. While the simulated

Study on the Effects of Future Urban Growth on Surface Ozone Concentrations in the Seoul Metropolitan Region

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Estimation of Air Pollutant Emissions for the Conversion of Diesel to CNG in the Busan Metropolitan Area

for P4-2 is dispersed to southwest inland due to northeasterly flows,