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Developing a decision support system for selecting new crops
Guhyun Jung,Myounghee Jeon,Jinhong Lee,Heundong Park,Seyong Lee,Joonyong Kim 한국농식품정보과학회 2018 Agribusiness and Information Management Vol.10 No.2
Due to changes in the agricultural market environment and both overseas and domestic farming conditions, uncertainties in agricultural production and management are becoming greater. Hence, there is a stronger need for farmers to choose crops in the optimal condition. This research aims to introduce the result and process of developing a decision support system for selecting crops, aimed to assist farmers in selecting the optimal crops most suitable in the given situation. There are basically three main factors to consider in the decision-making process for farmers when selecting a crop to introduce to their lands. First of all, one must consider how much profit crop A will produce when it is cultivated. Secondly, one must consider which crop to cultivate in order to earn a certain amount of profit. Thirdly, one must consider what is the best way to maximize Farm A’s business profit. For instance, a farm may have land as its resource, and one must research which location, type of crop, level of technology, and so forth, to maximize profit.This research creates a database of the profitability of a total of 180 crop types by analyzing Rural Development Administration’s survey of agricultural products income of 115 crop types, small land profitability index survey of 53 crop types, and Statistics Korea’s survey of production costs of 12 crop types. Furthermore, this research presents the result and developmental process of a web-based crop introduction decision support system that provides overseas cases of new crop introduction support programs, as well as databases of outstanding business success cases of each crop type researched by agricultural institutions.
Analysis of Management Performance of Bottle Cultivation in Mushroom Farm
Guhyun Jung,Myoung Hee Jeon,Jin Hong Lee,Yun-Hae Lee,Hae-Kil Lee 한국버섯학회 2017 버섯 Vol.21 No.2
In recent 10 years, mushroom cultivation area and number of cultivators have decreased, but mushroom production tends to increase. This shows that mushroom cultivation is being transformed from log and bed cultivation to bottle cultivation using automated facilities with high productivity per unit area. The bottle cultivation is possible to mechanized and automated, which can save manpower, less damage to pests, can be cultivated throughout the year, and is uniform in quality and advantageous for mass production. However, the investment in production facilities and farm materials is very large compared to the production of logs and bed cultivars, which can lead to large losses in the case of failure to grow. Therefore, it is necessary for the farmers who want to start the bottle cultivation to make careful management decisions by carefully examining the investment cost, the operating cost, and the expected income that are put into the bottle cultivation system. This study was conducted to analyze the management performance of bottle cultivation in mushroom farm and use it as farming decision making data. As a result of analysis of the management performance through farmers' survey, it was found that such as cost of spawn, substrate materials, other material, employment effort, and fuels & electricity power cost accounted for a large proportion of the cost of bottle cultivation.
Developing a decision support system for selecting new crops
Jung, Guhyun,Jeon, Myounghee,Lee, Jinhong,Park, Heundong,Lee, Seyong,Kim, Joonyong Korean Society of Food and Agricultural Informatio 2018 Agribusiness and Information Management Vol.10 No.2
Due to changes in the agricultural market environment and both overseas and domestic farming conditions, uncertainties in agricultural production and management are becoming greater. Hence, there is a stronger need for farmers to choose crops in the optimal condition. This research aims to introduce the result and process of developing a decision support system for selecting crops, aimed to assist farmers in selecting the optimal crops most suitable in the given situation. There are basically three main factors to consider in the decision-making process for farmers when selecting a crop to introduce to their lands. First of all, one must consider how much profit crop A will produce when it is cultivated. Secondly, one must consider which crop to cultivate in order to earn a certain amount of profit. Thirdly, one must consider what is the best way to maximize Farm A's business profit. For instance, a farm may have land as its resource, and one must research which location, type of crop, level of technology, and so forth, to maximize profit.This research creates a database of the profitability of a total of 180 crop types by analyzing Rural Development Administration's survey of agricultural products income of 115 crop types, small land profitability index survey of 53 crop types, and Statistics Korea's survey of production costs of 12 crop types. Furthermore, this research presents the result and developmental process of a web-based crop introduction decision support system that provides overseas cases of new crop introduction support programs, as well as databases of outstanding business success cases of each crop type researched by agricultural institutions.
브로멜라인이 캡슐화 된 W/O/W 이중 에멀젼을 적용한 삼치 연화 및 품질 평가
강구현 ( Guhyun Kang ),이상윤 ( Sangyoon Lee ),김효태 ( Hyo Tae Kim ),이지선 ( Jiseon Lee ),고은영 ( Eun Young Ko ),최미정 ( Mi-jung Choi ) 한국산업식품공학회 2021 산업 식품공학 Vol.25 No.1
In this study, spray-dried double emulsion loaded bromelain was applied to Japanese Spanish mackerel fillets to develop fish-type, elderly-friendly foods. Japanese Spanish mackerel, treated with spray-dried double emulsions, were stored at 4℃ for 24 h. For the characterization of emulsion particles, the particle size, ζ-potential, and morphology were determined. The color, TBARS, VBN, TMA, hardness, and adhesiveness of fish fillets treated by emulsion were measured for physicochemical properties. All the particle sizes of spray-dried emulsion were decreased while their double emulsion structure was maintained. Spray-dried emulsion reduced the color difference of fish fillets and did not catalyze lipid oxidation and protein decomposition. Values of TBA, VBN, and TMA of all fish did not exceed 0.5 mg MDA/kg, 30 mg/100 g, and 10 mg/100 g, respectively, which are considered edible limits regardless of bromelain or emulsion application. Bromelain modified fish fillets' hardness and adhesiveness to be suitable for elderly food, although it was encapsulated in the emulsion. Thus, spray-dried fish oil W/O/W double emulsion-loaded bromelain can be applied as a fish tenderizer, and this study’s results can be utilized to develop elderly-friendly food.
유한요소해석을 이용한 평면 응력을 받는 완전 고정된 판의 좌굴 판단 기준에 대한 연구
이오성(Ohseong Lee),이건민(Keonmin Lee),윤정노(Jeongroh Yoon),유구현(Guhyun Ryu) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Buckling is undesirable phenomenon in designing mechanical elements. In particular, thin plate has low resistance about buckling due to its geometrical shape. Therefore, engineers have to be carful during the design proccess. Many preceding research derived buckling theories for various boundary conditions, but the solution of buckling mode is not a finite sum and is complicate to applicate in practical cases. Also, since the mathmetical solution of fully clamped rectangular plate is much more complicate than simply supported plate, the need for intuitively usable criteria emerges. Therefore, this study aims to suggest a criterion for clamped plate buckling by using finite element analysis method. From the results of iterative simulations, a criterion with simple straight lines was derived. This criterion does not strictly follow the curve from iterations, but since the derived criterion is simple and easy to applicate, it is worth enough for designing a thin plate.
유한요소해석을 이용한 평면 응력을 받는 완전 고정된 판의 좌굴 판단 기준에 대한 연구
이오성(Ohseong Lee),이건민(Keonmin Lee),윤정노(Jeongroh Yoon),유구현(Guhyun Ryu) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
Buckling is undesirable phenomenon in designing mechanical elements. In particular, thin plate has low resistance about buckling due to its geometrical shape. Therefore, engineers have to be carful during the design proccess. Many preceding research derived buckling theories for various boundary conditions, but the solution of buckling mode is not a finite sum and is complicate to applicate in practical cases. Also, since the mathmetical solution of fully clamped rectangular plate is much more complicate than simply supported plate, the need for intuitively usable criteria emerges. Therefore, this study aims to suggest a criterion for clamped plate buckling by using finite element analysis method. From the results of iterative simulations, a criterion with simple straight lines was derived. This criterion does not strictly follow the curve from iterations, but since the derived criterion is simple and easy to applicate, it is worth enough for designing a thin plate.
유한요소법을 활용한 항공기 탑재장비의 음향 소음 내구성 검증
이유경(Yu-Kyoung, Lee),이종학(Jong-Hak Lee),유구현(Guhyun Ryu),강동석(Dong-Seok Kang) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
In this study, the stress and fatigue life of an external mounting pod under the sound pressure were performed through theoretical analysis method at design stage. In order to verify the fatigue life of the stores acoustic noise durability according to the Method 515.5 standard of MIL-STD-810F, FEM analysis was carried out through the Response spectrum analysis and Miners theory.