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Ahn, Kyeong-Chan,Park, Jong-Hyun,Ahn, Jun-Ku,Yoon, Soon-Gil The Korean Institute of Electrical and Electronic 2007 Transactions on Electrical and Electronic Material Vol.8 No.2
[ $Bi_{1.5}Zn_{1.0}Nb_{1.5}O_7$ ] (BZN), $Bi_2Mg_{2/3}Nb_{4/3}O_7$ (BMN), and $Bi_2Cu_{2/3}Nb_{4/3}O_7$ (BCN) pyrochlore thin films were prepared on $Cu/Ti/SiO_2/Si$ substrates by pulsed laser deposition and the micro-structural and electrical properties were characterized for embedded capacitor applications. The BZN, BMN, and BCN films deposited at $25\;^{\circ}C$ and $150\;^{\circ}C$, respectively show smooth surface morphologies and dielectric constants of about $39\;{\sim}\;58$. The high dielectric loss of the films deposited at $150\;^{\circ}C$ compared with films deposited at $25\;^{\circ}C$ was attributed to the defects existing at interface between the films and copper electrode by an oxidation of copper bottom electrode. The leakage current densities and breakdown voltages in 200 nm thick-BMN and BZN films deposited at $150\;^{\circ}C$ are approximately $2.5\;{\times}\;10^{-8}\;A/cm^2$ at 3 V and above 10 V, respectively. Both BZN and BMN films are considered to be suitable materials for embedded capacitor applications.
Types of Home Meal Replacement and Determinants of Consumption in South Korea
Kyeong Ah Ahn,Young Chan Choe,Hye Bin Cho 한국농식품정보과학회 2014 Agribusiness and Information Management Vol.6 No.2
HMR is a home-style food product designed for convenience and cooked outside the home leaving out cumbersome cooking process and consumed at home. The present paper aims to find out factors that influence the consumption of HMR by analyzing data on food consumption during the 3 years between December 2010 and November 2013. Following the classification of Costa et al. (2001), this study categorized HMR products as 3 types as follows: C1 (ready to eat), C2 (ready to heat) and C3 (ready to cook), and examined factors affecting purchase rate and per capita purchase price for each type of HMR product. The results of our analysis show that only the purchase rate of C3 products was influenced by whether the purchaser was housewife with job or not. For those who do not live together with parents, per capita purchase price for HMR was high; and the more they ate out, the higher the purchase rate of HMR was.
Kyeong-Chan Ahn,Jong-Hyun Park,Jun-Ku Ahn,윤순길 한국전기전자재료학회 2007 Transactions on Electrical and Electronic Material Vol.8 No.2
Bi1.5Zn1.0Nb1.5O7 (BZN), Bi2Mg2/3Nb4/3O7 (BMN), and Bi2Cu2/3Nb4/3O7 (BCN) pyrochlore thin films were prepared on Cu/Ti/SiO2/Si substrates by pulsed laser deposition and the micro-structural and electrical properties were characterized for embedded capacitor applications. The BZN, BMN, and BCN films deposited at 25 oC and 150 oC, respectively show smooth surface morphologies and dielectric constants of about 39 ~ 58. The high dielectric loss of the films deposited at 150 oC compared with films deposited at 25 oC was attributed to the defects existing at interface between the films and copper electrode by an oxidation of copper bottom electrode. The leakage current densities and breakdown voltages in 200 nm thick-BMN and BZN films deposited at 150 oC are approximately 2.5 x 10-8 A/cm2 at 3 V and above 10 V, respectively. Both BZN and BMN films are considered to be suitable materials for embedded capacitor applications.
Analysis of Multi-climate Controller Data in Tomato Greenhouses
Kyeong Ah Ahn,Won Hyuk Jung,Jin Young Byeon,Young Chan Choe 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.7
Most farms in South Korea have not applied the best use of greenhouse controllers. The system is used at a basic level, which is only possible to turn on/off at the facility. Therefore, further data analysis is needed to improve greenhouse management and to develop the future value of the technology. This study tests a growth model of the greenhouse tomato by analyzing a set of data collected from a multi-climate control system. The growth model is used to examine the growth rate of tomatoes depending on the climate variables. The results show that the growth rate of the stem thickness and leaf area is affected by temperature, CO2 concentration and humidity. Since the variables fluctuate between control points, a nonlinear model would fit the data better than a linear one. The results could be posted up on a dash board or sent via a smartphone to the management decision maker.
Types of Home Meal Replacement and Determinants of Consumption in South Korea
Ahn, Kyeong Ah,Choe, Young Chan,Cho, Hye Bin Korean Society of Food and Agricultural Informatio 2014 Agribusiness and Information Management Vol.6 No.2
HMR is a home-style food product designed for convenience and cooked outside the home leaving out cumbersome cooking process and consumed at home. The present paper aims to find out factors that influence the consumption of HMR by analyzing data on food consumption during the 3 years between December 2010 and November 2013. Following the classification of Costa et al. (2001), this study categorized HMR products as 3 types as follows: C1 (ready to eat), C2 (ready to heat) and C3 (ready to cook), and examined factors affecting purchase rate and per capita purchase price for each type of HMR product. The results of our analysis show that only the purchase rate of C3 products was influenced by whether the purchaser was housewife with job or not. For those who do not live together with parents, per capita purchase price for HMR was high; and the more they ate out, the higher the purchase rate of HMR was.
작목전환의 단계별 성공요인 분석 -HERO 모델 적용-
안경아 ( Kyeong Ah Ahn ),박성희 ( Sung Hee Park ),조혜빈 ( Hea Bin Jo ),최영찬 ( Young Chan Choe ) 한국농촌지도학회 2012 농촌지도와 개발 Vol.19 No.3
Conditions of farm crop switching are affected by several important external factors such as agricultural products import opening, policy support, and climate change. Farming environment is always changing; barriers to imports are becoming lower and lower because of FTA and others, and climate change affects a boundary line of cultivation. Those situations give farmers motivation to change crops in order to cope with them. In addition, crop switching has been done in response to the local government measures about purchase of local agricultural products according to the local food and the expansion of organic agricultural products in school meal. Even though the favorable environment toward crop switching has been created, there are not many researches or outcomes regarding crop switching. Only few studies focus on the list of decision-making in crop switching, and locally suitable crop selection is not treated. In order to utilize crop switching as a farm management strategy, the proper frame should be studied and practical researches on application possibility also need. Therefore, study on crop switching is in a timely, proactive manner because farms catch the chance of expansion of school meal by changing crops. This paper applies HERO model used for venture foundation process to crop switching process. Success factors of HERO model are comprised of Habitate, Entrepreneurship, Resource, and Opportunity, and these phased application factors are applied to crop switching process. By doing so, each phase success factor of crop switching can be uncovered. Three farm organizations supplying organic agricultural products to schools are studied in Gyeonggi province. As a result, the stabilization stage cannot be achieved because of the habitate conditions and social conditions with low risk bearing of crop switching and current school meal systems are the main problems to block the diversification of risks. In order to succeed in crop switching, constructing the habitate in local districts or in systems of school meal is more effective than supporting each farm.
Rufinamide pretreatment attenuates ischemia-reperfusion injury in the gerbil hippocampus
Park, Chan Woo,Lee, Tae-Kyeong,Cho, Jeong Hwi,Kim, In Hye,Lee, Jae-Chul,Shin, Bich-Na,Ahn, Ji Hyeon,Kim, Sung Koo,Shin, Myoung Cheol,Ohk, Taek Geun,Cho, Jun Hwi,Won, Moo-Ho,Lee, Young Joo,Seo, Jeong Y Informa UK (Taylor Francis) 2017 Neurological research Vol.39 No.11