탱크모형에 의한 농산물의 출하예측 -마늘을 중심으로-

서교,이정재,Suh, Kyo,Lee, Jeong-Jae 한국농공학회 2005 한국농공학회논문집 Vol.47 No.2

While the need for analyzing and interpreting agricultural logistics are becoming more and more prominent with the rapid changes within the agricultural environment, previously mathematical models have been proved to have its limitations due to the unpredictable traits of agriculture itself and finding the adequate simulation model is not easy. Therefore, in this research, the tank model that has been used to analyze the rainfall-runoff in watersheds, was used to develop a logistics model for estimating shipment by agricultural production. The model was certified by wholesale market data of garlic.

자원에 대한 새로운 인식에서 시작하는 농촌자원계획

서교,김솔희 한국농공학회 2016 韓國農工學會誌 : 전원과 자원 Vol.58 No.3

GASS를 이용한 농산물 유통 시스템 시뮬레이션

서교,이정재,김태곤,이호재,Suh Kyo,Lee Jeong-Jae,Kim Tae-Gon,Yi Ho-Jae 한국농공학회 2005 한국농공학회논문집 Vol.47 No.4

The object of this study is to develop simulation model using GASS for analyzing complex agricultural marketing. It's hard to analyze agricultural marketing system which consists of many marketing unit by economic mathematical model. This paper proposes simulation model based on GASS which can reduce complexity of system, and applies the national average wholesale cost and retail cost of alpine Chinese cabbage at 2001, 2002 to proposed simulation model.

팔레트 적재효율을 고려한 농산물 포장상자 통합규격에 관한 연구

서교,이정재,서병륜,Suh, Kyo,Lee, Jeong-Jae,Suh, Byong-Yoon 한국농공학회 2005 한국농공학회논문집 Vol.47 No.1

Despite the variety in sizes and shapes of agricultural products, the unified standardization of packing has been a long time necessity. In this study the stacking efficiency of packing standards for each box using packing Monte Carlo simulation based on the standard pallet is evaluated. As a result of simulation the unified packing standard for agricultural products is suggested by 550$\times$366 mm. With this study it is expected that the unification of the standards can help to increase the utilization of reusable packages and to improve efficiency of agricultural logistics.

국내 바이오매스 잠재 가용자원을 이용한 바이오 연료 생산량 및 온실가스 감축효과 분석

서교,김태곤,이정재,Suh, Kyo,Kim, Tae-Gon,Lee, Jeong-Jae 한국농공학회 2010 한국농공학회논문집 Vol.52 No.4

Biofuel based on available biomass in rural area could contribute to increase the vitality and income of rural residents. This study estimates the potential production and environmental benefits of biofuel production from surplus rice, rice straw, cow manure, and food waste in South Korea. We could produce about 2.4 billion liters of ethanol using surplus rice and rice straw and 841 million $m^3$ of methane from cow manure and food waste. 1.7 billion liters of gasoline and 800 million liters of diesel could be replaced with these potential biofuel productions, which can annually reduce 4.9 million ton $CO_2$ eq. GHGs.

신뢰성 해석기법을 이용한 배추 가격폭등 예측 모형의 개발

서교,이정재,김태곤 한국농공학회 2008 한국농공학회논문집 Vol.50 No.3

Generally the price of agricultural products has much different characteristics from that of manufacturing products. If products have the limitation of long-term storage and the short period of cultivation, the price of products can be more unstable. Moreover, the price forecasting is very difficult because it doesn't follow any cycle or trend. However price can be regarded as risk instead of uncertainty if we can calculate the probability of price. Reliability analysis techniques are used for forecasting the price change of chinese cabbage. This study aims to show the usability of reliability analysis for price forecasting. A price-forecasting model was developed based on weather data of 10 days before 70 days and the average price and standard deviation of wholesale market prices from 1996 to 2001 and applied to forecast the boom price of upland Chinese cabbage in 2002 and 2003. Applied results showed the possibility of boom price forecasting using reliability analysis techniques. Generally the price of agricultural products has much different characteristics from that of manufacturing products. If products have the limitation of long-term storage and the short period of cultivation, the price of products can be more unstable. Moreover, the price forecasting is very difficult because it doesn't follow any cycle or trend. However price can be regarded as risk instead of uncertainty if we can calculate the probability of price. Reliability analysis techniques are used for forecasting the price change of chinese cabbage. This study aims to show the usability of reliability analysis for price forecasting. A price-forecasting model was developed based on weather data of 10 days before 70 days and the average price and standard deviation of wholesale market prices from 1996 to 2001 and applied to forecast the boom price of upland Chinese cabbage in 2002 and 2003. Applied results showed the possibility of boom price forecasting using reliability analysis techniques.

고성능 시멘트 그라우트로 충진된 풍력타워 연결부의 정적 및 피로부착특성

서교,김상현,오홍섭 한국방재학회 2016 한국방재학회논문집 Vol.16 No.6

In this study, authors developed a high-performance fiber reinforced grout for applying the steel tube connections of offshore supporting structure and then conducted a bond tests for verifying the static and fatigue behavior of the grouted connection. The cement grout is composed with portland type 1 cement, alumina cement, silka fume, and added steel fiber to enhance the strength and toughness of grout and the compressive strength at 28day is at least 130MPa. Experimental variables for bond test are adopted aspect ratio (0.013 and 0.056) of shear key in steel connection, aspect ratio (30 to 67) and volume fraction (0.5, 0.9 and 2.3%) of steel fiber. The specimen with 2.3% fiber volume fraction and 0.056 aspect ratio of shear key has highest bond strength than other specimens and the fatigue life under cyclic loads up to 65% of ultimate strength is more than 1,600,00 cycles. 본 연구에서는 고성능시멘트 그라우트를 개발하여 해상 지지구조물 강재 튜브연결부에 적용하고자 하였으며, 그라우트에 의한 연결부의 정적 및 피로부착거동을 분석하기 위하여 부착실험을 수행하였다. 시멘트 그라우트는 인성과 강도를 높이기 위하여 1종 포틀란트 시멘트와 알루미나 시멘트 및 실리카 흄과 함께 강섬유를 사용하였으며, 130MPa이상의 28일 압축강도를 발현하였다. 부착강도 실험시 실험변수는 연결부 전단키의 형상비, 섬유혼입율과 섬유형상비를 적용하였다. 전단키의 형상은 0.013, 0.056이었으며, 섬유형상비(l/d)는 30~67, 섬유혼입율은 0.5%,0.9%,2.3%를 사용하였다. 실험결과 섬유혼입율 2.3%이상, 전단키 0.056인 경우의 부착강도가 가장 높게 나타났으며, 최대정적강도를 보인 실험변수의 피로수명 역시 응력수준 65%에서 1,600,000회 이상의 수명을 나타내었다.

Web 기반의 농산물 유통분석 통합 시스템 개발

서교,이정재,김태곤 한국농촌계획학회 2005 농촌계획 Vol.11 No.3

This study is to develop a web-based integrated system for flow of agricultural products based on recent researches with engineering approach. The system stands on the basis of web for accessibility and usability. Three parts of the system consist of analysis of regional shipping characteristics using tank model, estimation of pallet load efficiency with Monte Carlo Simulation, a long term prediction of market price with reliability analysis. Besides a decision support module for selecting optimal shipping market is added through synthesizing techniques and spatial analysis using GIS and applied to Chinese cabbage of Pyeongchang in 2004.

基于女性主义视野下的池莉小说日常生活叙事研究

徐巧 중국인문학회 2022 中國人文科學 Vol.- No.81

현대의 서사소설은 젠더적 시각과 일상의 시각이 잘 어우러져 현대 여성의 일상서사가 풍부하고 다양하다는 특징을 보인다. 池莉는 중국 신사실주의 창시자 중 한 명으로 여성의 시각으로 일상의 다양함을 잘 묘사해냈다. 페미니즘과 일상생활을 모두 중시하는 池莉의 소설을 분석하면서, 그녀가 서구 페미니즘 비판사상의 영향을 깊이 받았고, 또한 독특한 서사 풍격을 가지고 있어서 문학의 심미적인 세속화 전환이 비교적 뚜렷하게 나타나고 있음을 알 수 있었다. 여성주의 시각으로 보면, 池莉 신시대 소설의 일상생활에 대한 묘사는 여성의 일상생활 의식의 변천에 뿌리를 두고 있어서, 일상생활에서 소재를 찾고 湘방언을 사용하여 湖北省 사람들의 일상생활 진면목을 있는 그대로 드러내고 있다.독특한 시각과 내재적인 직관으로 여성의 심리와 생명성을 그려낸 池莉의 소설은 페미니즘 비판과 문학적인 실천의 전형으로 文學敍事에서 독특한 가치를 지닌다.

주성분 분석 및 군집분석을 이용한 지역정보 유형화 프레임워크의 설계와 구현

서교,김태곤,이지민,이정재,Suh, Kyo,Kim, Tae-Gon,Lee, Ji-Min,Lee, Jeong-Jae 한국농공학회 2012 한국농공학회논문집 Vol.54 No.1

For planning and developing rural regions, it is very important to understand and utilize regional characteristics including social, demographic, and economic aspects. The purpose of this study is to find effective analysis techniques and provide a procedure design for mining regional characteristics in South Korea through reviewing and analyzing 41 related studies. The engaged research methods can be classified into five categories (PCA+CA, PCA, CA, GIS, and PCA+GIS) with the combination of three methodologies: principal component analysis (PCA), cluster analysis (CA), and geographical information system (GIS). The combination of PCA and CA occupied about 40 % of research methods used in related studies. The analysis tool of Korean Rural Information Supporting System (KRISS) is designed based on the outcomes of this study and applied to classify the regional capacity of agriculture using agricultural census data (2000) for evaluating its applicability.