복잡한 해안지역의 지역특성을 고려한 대기 유동장에 따른 SO₂의 확산장 수치모의

이화운,원혜영,최현정,이강열,김현구 한국환경과학회 2005 한국환경과학회지 Vol.14 No.3

Recently air quality modeling studies for industrial complex and large cities located in the coastal regions have been carried out. Especially, the representation of atmospheric flow fields within a model domain is very important, because an adequate air quality simulation requires an accurate portrayal of the realistic three-dimensional wind fields. Therefore this study investigated effect of using high resolution terrain height data and FDDA with observational data to reflect local characteristics in numerical simulation. So the experiments were designed according to FDDA and the detail terrain height with 3sec resolution or not. Case 30s was the experiment using the terrain height data of USGS without FDDA and Case 3s was the experiment using the detail terrain height data of Ministry of Environment without FDDA and Case 3sF was experiment using the detail terrain height data of Ministry of Environment with FDDA. The results of experiments were more remarkable. In Case 3s and Case 3sF, temperature indicated similar tendency comparing to observational data predicting maximum temperature during the daytime and wind speed made weakly for difference of terrain height. Also Case 3sF had more adequate tendency than Case 3s at dawn.

공격 기법 모델링을 통한 사이버 공격 시뮬레이터 설계 및 구현

강용구(Yong Goo Kang),유정도(Jeong Do Yoo),박은지(Eunji Park),김동화(Dong Hwa Kim),김휘강(Huy Kang Kim) 한국컴퓨터정보학회 2020 韓國컴퓨터情報學會論文誌 Vol.25 No.3

정보 기술의 발달과 시스템 및 네트워크의 규모가 증가함에 따라 사이버 위협 및 범죄가 꾸준히 증가하고 있다. 이러한 위협에 대응하기 위해서 실질적인 공격과 방어 기반의 사이버 보안 훈련이 필요하다. 그러나 사이버 보안 훈련은 전문가의 분석과 공격 수행능력을 요구하므로, 비용 및 시간적인 측면에서 비효율적이다. 본 논문에서는 공격 기법들을 자동으로 수행하는 사이버 공격 시뮬레이터를 제안한다. 이 시뮬레이터는 구현 가능하도록 모델링 된 공격 기법들을 조합하여 공격 시나리오를 도출하고, 도출된 시나리오들을 순차적으로 수행함으로써 공격을 수행한다. 제안하는 공격 시뮬레이터의 유효성을 검증하기 위해 실제 환경에서 예시 공격 목표와 시나리오를 설정하여 실험하였다. 이 공격 시뮬레이터는 5 가지 공격 기법을 자동으로 수행하여 관리자 권한을 획득하는 공격에 성공하였다. With the development of information technology and the growth of the scale of system and network, cyber threats and crimes continue to increase. To cope with these threats, cybersecurity training based on actual attacks and defenses is required. However, cybersecurity training requires expert analysis and attack performance, which is inefficient in terms of cost and time. In this paper, we propose a cyber attack simulator that automatically executes attack techniques. This simulator generates attack scenarios by combining attack techniques modeled to be implemented and executes the attack by sequentially executing the derived scenarios. In order to verify the effectiveness of the proposed attack simulator, we experimented by setting an example attack goal and scenarios in a real environment. The attack simulator successfully performed five attack techniques to gain administrator privileges.

Analysis of transcriptome change in high level of VitE accumulating rice mutant induced by in vitro mutagenesis

Jung Eun Hwang,Sun-Hee Kim,Kang-ie Lee,Sun-Goo Hwang,Jin-Baek Kim,Sang Hoon Kim,Bo-Keun Ha,Si-Yong Kang,Dong Sub Kim 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07

VitE (tocotrienols and tocopherols) are micronutrients with antioxidant properties synthesized by photosynthetic bacteria and plants that play important roles in animal and human nutrition. A new mutant line, T1001-1, was isolated from in vitro mutagenized population by ionizing radiation and shown to have increased VitE contents. The total VitE content was 26% increased in the T1001-1 mutant seeds compare with cv. Dongan (wild-type). In addition, we showed that the mutant confers retarded seedling growth during the early seedling growth stage in rice. To study the molecular mechanism of VitE biosynthesis, we used the rice microarray to identify genes that are upor down-regulated in T1001-1 mutant. In addition, we identified differentially regulated pathway using MapMan analysis, which provides deep insight into changes in transcript and metabolites. Our results enhanced the transcription of genes involved in starch and lipid metabolism in T1001-1 mutant. To identify the molecular mechanisms of the events involving transcription factors in tocopherol accumulation, we compared the expression patterns of transcription factors. The AP2-EREBP, WRKY, C2H2 transcription factor were up-regulated, whereas the MYB family was down-regulated in T1001-1 mutant. Our results demonstrate change of important transcript in high level of VitE accumulating rice mutant.

광주시민의 여름철 절화 구매성향에 관한 조사연구 : I.절화용 꽃다발 조합 및 장소에 따른 구매성향 I.Preference for the cut flowers by the combination of cut flowers and selling place.

강종구,박화성,손정금,정순주 全南大學校 農業科學技術硏究所 1995 農業科學技術硏究 Vol.30 No.-

Preference for cut flowers in relation to the combination of cut flowers and selling place was surveryed during summer in Kwang-ju district. The survey was made with seven combinations of cut flowers with statice, rose, gypsophila, carnation, mistyblue and gladiolus in the eleven selling places. Combination of rose+gypsophila was the most popular one followed by statice only, while combinations of carnation+gypsophila, rose+gypsophila+red of or pink carnation, and the gladiolus only were less popular. Prefercned for statice was high in all the selling places, except the central part of the city and Chonnam National University gate, where the combination of rose+gypsophila was recommended. The combination of carnation+gypsophila was popular in the apartment areas. Market areas were not recommended for selling place of the cut flowers, regardless of the kind cut flowers.`

Performance Analysis of Water-Water Heat Pump System of 100 kW Scale for Cooling Agricultural Facilities

Kang, Youn Ku,Ryou, Young Sun,Jang, Jae Kyung,Kim, Young Hwa,Kim, Jong Goo,Kang, Geum Chun Korean Society for Agricultural Machinery 2014 바이오시스템공학 Vol.39 No.1

Purpose: In this study, the performance of cooling system with the water-water heat pump system of 100kW scale made for cooling agricultural facilities, especially for horticultural facilities, was analyzed. It was intended to suggest performance criteria and performance improvement for the effective cooling system. Methods: The measuring instruments consisted of two flow meters, a power meter and thermocouples. An ultrasonic and a magnetic flow meter measured the flow rate of the water, which was equivalent to heat transfer fluid. The power meter measured electric power in kW consumed by the heat pump system. T-type thermocouples measured the temperature of each part of the heat pump system. All of measuring instruments were connected to the recorder to store all the data. Results: When the water temperature supplied into the evaporator of the heat pump system was over $20^{\circ}C$, the cooling Coefficient Of Performance(COP) of the system was higher than 3.0. As the water temperature supplied into the evaporator, gradually, lowered, the cooling COP, also, decreased, linearly. Especially, when the water temperature supplied into the evaporator was lower than $15^{\circ}C$, the cooling COP was lower below 2.5. Conclusions: In order to maintain the cooling COP higher than 3.0, we suggest that the water temperature supplied into evaporator from the thermal storage tank should be maintained above $20^{\circ}C$. Also, stratification in the thermal storage tank should be formed well and the circulating pumps and the pipe lines should be arranged in order for the relative low-temperature water to be stored in the lower part of the thermal storage tank.

분말상 탄닌수지를 이용한 파티클보드의 제조기술 및 물성개선

강석구,이화형 한국목재공학회 2004 목재공학 Vol.32 No.1

천연접착제인 분말상 탄닌수지를 사용한 파티클보드의 물리·기계적 성질의 개선을 위하여 분말상 탄닌수지와 액상 탄닌수지를 혼합하여 사용한 결과, 30:70 (분말 : 액상)의 혼합비가 최적조건이었으며 분말상 탄닌 수지의 비율이 높으면 물성이 저하되는 현상을 볼 수 있었으며 또한 포름알데히드 방산량이 E0 수준의 고내수성 제품을 제조할 수 있었다. 한편 요소수지 및 멜라민수지와 분말상 탄닌 수지와의 혼합방법은 물리·기계적 성질의 개선에 영향을 주지 못했으며, 유리포름알데히드 방산에 대한 scavenger의 역할만을 하였다. This study was carried out to improve the properties of powdered tannin adhesive(PT) by adding liquid tannin resin(LT) to PT in the manufacture of particleboard. Mixing the LT to PT from 50% to 100% by weight did not show any difference in particleboard properties, but the higher the powdered tannin resin ratio, the lower the properties of the board. The proper ratio of PT to LT was 30:70 for the improvement of PT-particleboard, unless LT lower than 70%. Internal bonding strength was in proportional to the amount of LT. Mixing amino adhesives and PT did not show any improvements in mechanical and physical properties of the board but they only acted as scavenger for the free formaldehyde. Manufacturing particle board with the adhesive of 30:70 (PT:LT) and by using double blender resulted in high-performance products of Eh level of formaldehyde emission with high water resistance (U type; below 12%, M type; below 25%), as well as saving chip drying energy.

Adsoprtion Characteristic of Fancy Veneer Overlain Charcoal Board Composite

Hwa Hyoung Lee,Seong Goo Kang 한국목재공학회 2010 목재공학 Vol.38 No.5

The flavonoid ellagic acid from a medicinal herb inhibits host immune tolerance induced by the hepatitis B virus-e antigen

Kang, Eun Hwa,Kown, Tae Young,Oh, Goo Taeg,Park, Weung Feel,Park, Sung-Il,Park, Sung Kyu,Lee, Young Ik Elsevier 2006 ANTIVIRAL RESEARCH Vol.72 No.2

<P><B>Abstract</B></P><P>The aim of this study is to characterize the role of ellagic acid, a flavonoid from a medicinal herb which blocks HBeAg secretion in a HBV infected cell line and in HBeAg transgenic mice, in immune tolerance in chronic HBV infection. Using the mouse strain C57ML/6, HBeAg-producing transgenic mice (HBeAg-Tg), under the control of metal ion-inducible promoter were generated. The effect on immune tolerance of HBeAg-Tg and the release of immune tolerance by the inhibitor of HBeAg secretion, ellagic acid, was tested using T/B cell proliferation, HBeAg/HBeAb production, cytotoxic T-lymphocyte (CTL) and cytokine assays.</P><P>C57ML/6 based HBeAg-producing HBeAg-Tg mice were tolerant to HBeAg at the T and B-cell level, did not produce antibodies to HBeAg in vivo and in vitro, produced minimal levels of cytokines (IL-4 and IFN-gamma) and decreased CTL responses, while feeding mice with ellagic acid (5mg/kg body weight) blocked the immune tolerance caused by HBeAg. Our results suggest that host immune tolerance induced by HBeAg during HBV infection, a viral strategy to guarantee HBV infection, can be overcome by ellagic acid, thus it can be used as a therapeutic for HBV-carriers.</P>

A New Waxy Wheat Cultivar "Shinmichall" with Stress Tolerance

Hwa Young Heo,Chul Soo Park,Moon Suk Kang,Hyung Ho Park,Chun Kee Lee,Hong Sik Kim,Bon Chul Goo,Jong Chul Park,Kwang Geun Park,Young Keun Cheong,Jung Gon Kim 한국육종학회 2007 한국육종학회지 Vol.39 No.3

“Shinmichal1”, a waxy red winter wheat (Triticum aestivum L.) cultivar was developed by the National Institute of Crop Science, RDA. It was derived from the cross “Alchan”/“Chal2”during 1997. “Alchan” is a soft red winter wheat with high yield and good noodle quality. “Chal2” is a waxy wheat line crossed by “Kanto107” (Wx-A1b and Wx-B1b) and “BaiHuo” (Wx-D1b). “Shinmichal1” was evaluated as “Suwon306” in Advanced Yield Trial Test in 2002. It was tested in the regional yield trial test between 2003 and 2006. “Shinmichal1” is an awned, semi dwarf and soft red winter wheat, similar to “Uri” (check cultivar). The Heading and maturing date of “Shinmichal1” were similar to “Uri”. Culm and spike length of “Shinmichal1“ were 79 cm and 7.8 cm. “Shinmichal1“ had greater test weight (802 g) and lower 1,000-grain weight (31.8 g) than “Uri” (782 g and 35.2 g, respectively). It has resistance to winter hardiness, wet-soil tolerance, lodging tolerance and moderate post-harvest sprouting damage. “Shinmichal1” had higher flour yield (66.2%), ash (0.73%), protein (10.9%) and SDS sedimentation volume (40.7 ml) than “Uri” (64.7%, 0.53%, 9.3%, and 32.5 ml, respectively) and similar flour color to “Uri”. “Shinmichal1” had higher dough extensibility and lower dough strength than “Uri”. It is 5.2% of amylose content and had typical waxy starch pasting properties. Average yield of “Shnmichal1” in the regional adaptation yield trial was 5.24 MT ha-1 in upland and 5.58 MT ha-1 in paddy field, which was 3% and 8% lower than those of “Uri” (5.39 MT ha-1 and 6.09 MT ha-1, respectively). “Shinmichal1” would be suitable for the area above the daily minimum temperature of -10℃ in January in Korean peninsula.

The expression of ketohexokinase is diminished in human clear cell type of renal cell carcinoma

Hwa, Jeong Seok,Kim, Hyun Joon,Goo, Bo Mee,Park, Hyo Jin,Kim, Choong Won,Chung, Ky Hyun,Park, Hyung Chul,Chang, Se-Ho,Kim, Yeon Woong,Kim, Deok Ryong,Cho, Gyeong Jae,Choi, Wan Sung,Kang, Kee Ryeon WILEY-VCH Verlag 2006 Proteomics Vol.6 No.3

<P>For identification and targeting of tumor-associated marker proteins, the proteome of clear cell type of renal cell carcinoma (RCC) and normal kidney tissues was analyzed by 2-DE. Ketohexokinase (also called fructokinase), which catalyzes the phosphorylation of fructose to fructose 1-phosphate, was identified by MALDI-TOF MS and found to be expressed at low rates in the renal tumor tissues. We found a decreased amount of ketohexokinase mRNA in RCC compared to that observed in the normal kidney tissues by Northern blot. The activity of ketohexokinase in 20 clear cell RCC specimens and the 20 corresponding normal kidneys was investigated, and its activity was shown to be approximately 1.4-fold lower in the RCC specimens than in the normal kidney. Ketohexokinase activity in tumor stage pT3 RCC was 1.5-fold lower than in pT1 RCC. The level of ketohexokinase activity in histological grade 3 RCC was 1.8-fold lower than that in grade 1 cancer. In addition, using in situ hybridization, it was revealed that ketohexokinase in the normal kidney tissue was confined to the proximal tubular epithelial cells, while the expression of ketohexokinase in RCC tissues was extremely low. Our research results show that the expression of human ketohexokinase was diminished in clear cell RCC.</P>