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감자와 무를 재배하는 사질양토 고랭지 밭의 시비량에 따른 비점오염 발생량 비교
최용훈,원철희,박운지,신민환,신재영,이수인,양희정,최중대,Choi, Yong Hun,Won, Chul Hee,Park, Woon Ji,Shin, Min Hwan,Shin, Jae Young,Lee, Su In,Yang, Hee Jeong,Choi, Joong Dae 한국관개배수위원회 2012 한국관개배수논문집 Vol.19 No.1
This study was performed to monitor the runoff of sandy soils on alpine uplands between March 2008 and December 2009, and assess non-point source pollution load. The fields were used to cultivete poteto in 2008 and radish in 2009. The fertilizers used in 200S, compared to those used in 2009, contained 2.1 times of nitrogen, 1.9 times of phosphorous, and 2.3 times of potassium. In 2008, the annual pollution load indiceted SS 2,908.47kg/ha/yr, COD 67.95kg/ha/yr, BOD 50.72kg/ha/yr, TN l3.29kg/ha/yr, and TP 9.97kg/ha/yr. In 2009, the annual pollution load indiceted SS 3,908.34kg/ha/yr, COD 225.04kg/ha/yr, BOD 156.96kg/ha/yr, TN 18.88kg/ha/yr, and TP 36.41kg/ha/yr. The amount of fertilizers used was about twice greeter in 2008, but the amounts of TN in pollution load per unit of rainfall were similar by 0.031kg/ha/mm to 0.029kg/ha/mm, whereas the amounts of COD (0.16kg/ha/mm to 0.35kg/ha/mm), BOD (0.12kg/ha/mm to 0.24kg/ha/mm), and TP (0.023kg/ha/mm to 0.057kg/ha/mm) doubled in 2009. We can infer thet the surface covering by the growth of crop mainly affected the transport of T-N through the subsurface flow to reduce non-point source pollution.
비강우시 도시 합류식 하수도의 오염부하 산정을 위한 최적관측시간 산정연구
최용훈,원철희,박운지,서지연,신민환,이찬기,최중대,Choi, Yong-Hun,Won, Chul-Hee,Park, Woon-Ji,Seo, Ji-Yeon,Shin, Min-Hwan,Lee, Chan-Ki,Choi, Joong-Dae 한국농공학회 2009 한국농공학회논문집 Vol.51 No.3
Flow and pollution load were monitored at 2 combined sewer outlets (C-1 and C-2) of urban watersheds during dry weather from September, 2004 to April, 2006 for 20 months. The objectives were to investigate the diurnal variation of flow and pollutant load and to find the proper sampling time that could measure representative flow and pollutant load. Pollution load closed to the average daily load at C-1 could be measured at 00:00 hour and by the mean of 15:00 and 18:00 hour measures, and 15:00 and 21:00 hour measures, respectively. In addition at C-2, it was 21:00 hour and the mean of 15:00 and 18:00 hour measures. This study concluded that arbitrary sampling of flow and water quality could cause large errors in the estimation of urban pollution load and recommended that urban combined sewers should be monitored when flow and water quality showed daily average and concentration.
ICT 활용과 자기 주도적 학습력 신장을 위한 사회과 교수-학습 시스템 개발
최용훈,황선영,고병오,Choi, Yong-Hun,Hwang, Sun-Young,Goh, Byung-Oh 한국정보교육학회 2003 정보교육학회논문지 Vol.7 No.2
Individual studying that compose knowledge and improve efficiency of studying through collection of information by various class strategy which takes advantage of web, and Cooperative learning that can elevate sense of responsibility and solve the problem through communication with another person have been developed actively. But, individuation tutoring materials that is developed present doesn't fit of causing learner's interest, and stimulating curiosity about problem because mostly studying is gone in presentation form. Also, cooperative learning materials are lacking connection with actual course of education, application is difficult in real class spot. So, this research has applied self-directed learning, centered with interested operation activity, aimed at improvement in various thought. Also, we have developed social studies tuition-learning system, purpose to the management is possible with on-line project studying which could improve mind-decision ability and ICT application ability. This system is developed for flexible management could be possible in various class circumstance, and level learning could be done through accomplishment-test and the result could be applied by feedback process.
최용훈 ( Choi Yong Hun ),신민환 ( Shin Min Hwan ),김기철 ( Kim Ki Choel ),서지연 ( Seo Ji Yeon ),임경재 ( Lim Kyoung Jae ),최중대 ( Choi Jung Dae ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
Non-Point Source(NPS) type and quantity discharged are changed according to rainfall, rainfall intensity, duration, landuse, antecedent dry day. The research have made the flat plot and the sloping plot and executed a monitoring. The study have analyzed affect of the daily rainfall and rainfall intensity on runoff from sandy upland. The runoff did not occur from the rainfall of 30mm and above(March 22nd ~ 24th, May 18th, May 28th and June 28th ~ 29th). Because of weak rainfall intensity and long duration the runoff did not occur. The runoff occurred from 19mm rainfall of June 12th and 40mm rainfall of July 30th. Because of strong rainfall intensity and short duration the runoff did occur. Also accumulated rainfall is little, but runoff occurred because of concentration of rainfall. The result of research is the point that the different runoff occurs because of the rainfall intensity, when the same accumulated rainfall. Consequently, it was judged that rainfall intensity is the biggest effect to runoff of the sandy upland.
최용훈(Yong-Hun Choi),김연수(Yeon-soo Kim),송승규(Seung-Gyu Song) 한국해양관광학회 2023 해양관광학연구 Vol.16 No.2
Local festivals can enhance the image of the region, revitalise the local economy by selling local specialities, etc. local economy by selling local specialities, etc. . In order to achieve these effects, local governments are making great efforts to find their own identity by organising local festivals. In order to achieve these effects, local governments are making great efforts to find their own identity by organising local festivals. Many efforts are being made to ensure the sustainability of the region and to revitalise the local economy through the festival. Local festivals. This paper investigates and analyses the concepts of regional extinction and marine tourism based on theories to find out how to revitalise marine tourism resources and marine tourism to prevent regional extinction. In addition, to complete this study, the elements of marine festivals were presented based on the basic elements of festivals, and the direction of marine festivals to prevent regional extinction was suggested. In this study, we propose six main categories of maritime festivals. First, a proposal for content Secondly, we need a plan for the operation of the festival. Thirdly, we need a plan for the organisation that will run the festival. Fourthly, the main purpose of the festival is to support the livelihoods of fishing communities and to create sustainable fishing communities. and sustainable fishing communities and prevent the disappearance of fishing villages. Fifth, for a sustainable maritime festival, we need to ensure that the festival is run in a systematic way. systematic operation of the festival. Sixthly, the Ocean Festival is a celebration of the great outdoors and the human livelihoods that depend on it. content.
최용훈 ( Choi Yong-hun ),권승구 ( Kown Sung-ku ),지인배 ( Ji In-bae ) 韓國食品流通學會 2019 한국식품유통학회 학술대회 Vol.- No.하계
본 연구는 국내산 쌀의 안정적인 소비기반 구축을 위해 소비자가 쌀을 구매할 때 고려하는 속성 요인과 속성의 변화에 따른 쌀 시장점유율 변화에 대해 분석하였다. 소비자는 쌀 제품을 구매할 때 가격(40%)을 가장 중요한 속성으로 여기고 있으며, 다음으로 품종 21%, 원산지 18%, 품질(맛) 14%, 친환경품질인증 7%의 순으로 중요도가 나타났다. 군집분석 결과 국내산 쌀과 수입쌀의 구매 목적이 분명하게 다른 것으로 나타났다. 국내산 쌀은 상대적으로 높은 가격에도 불구하고 쌀에 대한 안전성과 신뢰도가 높기 때문에 구입하는 것을 알 수 있었다. 반면에 수입쌀은 저렴한 가격의 이점 때문에 소비자의 구매의욕이 높아지는 것으로 나타났다. 시나리오 분석 결과 513%의 관세가 부과된 수입쌀은 가격의 이점이 없기 때문에 국내산 쌀과의 경쟁에서 열위에 있는 것으로 나타났지만, 관세가 없이 수입되어 낮은 가격에 판매되는 수입쌀에 대해서는 소비자가 충분한 구매의사가 있는 것으로 나타났다.
저전력 소모를 위한 오토마타 기반의 실내/외 판단 컨텍스트 생성 모델
최용훈 ( Yong-hun Choi ),최기용 ( Ki-yong Choi ),이정원 ( Jung-won Lee ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.2
스마트폰에서 컨텍스트 생성에 관한 연구들과 저전력에 관한 연구들이 진행 중이지만 컨텍스트 생성시에 사용되는 전력 소비 때문에 어플리케이션 개발 시에 컨텍스트를 이용하기가 어렵다. 컨텍스트를 생성하는 연구에서는 컨텍스트 생성 시에 필요한 전력에 대한 연구와 필요 이상의 전력 소비 발생에 관해서는 언급한 바가 적고 진행되어온 저전력 연구는 대부분 디스플레이와 AP 프로세서에 치우쳐 있어 저전력 컨텍스트 생성에 적용하기 힘들다. 그렇기 때문에 컨텍스트 생성 시에 필요한 전력에 대한 측정과 컨텍스트 생성 시에 불필요한 전력 낭비가 일어나는지, 그리고 컨텍스트 생성 시 과다한 전력 소비가 일어났을 경우 효율성에 대해서 생각할 필요성이 있다. 따라서 본 논문에서는 컨텍스트 생성시에 전력 소비가 얼마나 일어나는지 측정하고, 컨텍스트 생성에 있어 불필요한 전력 소비가 일어나는지 측정한다. 이를 토대로 불필요한 전력 소비가 일어나는 부분에 적용할 저전력 기법을 제안한다.