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크락사와 APG를 이용한 유류오염토양중의 유분제거에 관한 연구
권기생(K. S. Kwon),정헤종(H. J. Jeong),김용복(Y. B. Kim),유신주(Y. S. Ju),권강민(K. M. Kwon) 한국해양환경·에너지학회 2007 한국해양환경·에너지학회 학술대회논문집 Vol.2007 No.-
By the industrial work and military operation, some facilities discharged or spilled amount of waste oil or oil mixtures due to leakage of many kinds of oil. The soil in these facilities was seriously polluted by waste oil or oil mixtures and We, urgently need the research for the cleaning up and restoring from the polluted soil by the way of environment-friendly and economical methods In this study, from the test results by crasher and surfactant(APG) in the fields operation experiment, we got good results of the removal ratio of THP from polluted clay soil and sand, these methods will get better result as the economical and environment-friendly treatment methods. As results of this study, found out that amount of polluted oily soil and sand will be clean at once time in the limit of acts of environments.
CFD 해석을 통한 까치 둥지 형상의 환경적응성에 관한 연구
유승천(Seung Cheon Yu),권은비(Eun Bi Kwon),이상임(Sang Im Lee),최재천(Jae Chun Choe),최재붕(Jae Boong Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Surviving for 35 billion years in the earth, living things have developed their organisms to fit the wild nature. In the earlier study, Korean magpie's nests data are collected and clarified such as shape, size, length and etc. From the obtained data, the direction of axis in horizontal section of their nests is observed to match with that of the strongest wind at the nesting site. The computational fluid dynamics analysis is conducted to validate the assumption through 20 finite element model of horizontal ellipse section. Increasing the length of the longest horizontal axis of the nests by 10% reduced the flow velocity at the midpoint of nest cup by 50%. This would help magpies to preserve heat that is crucial for the growth and survival of their offspring in the nest due to optimize the wind blocking. The finite element method result explains the way of evolution for magpie's nest construction.
유원근(Won-Keun Yu),권일(Il Kwon),최호영(Ho-Yeong Choi) 한국산업경제학회 2014 산업경제연구 Vol.27 No.6
저성장지역의 특징은 제조업 비중이 상대적으로 낮고 농림어업 부문의 비중이 상대적으로 높다는 데에 있다. 강원지역의 경우 시장조건이 불리하여 타지역에 비해 불리한 성장 조건을 지니고 있다. 이러한 문제의식을 토대로 본 연구는 먼저 강원지역의 경제적 여건과 특성을 객관적으로 파악하고, 향후 지역의 안정적 성장을 이룰 수 있는 효율적인 발전 방안을 제시할 것이다. 이를 위해 본 연구는 강원지역 지역내총생산의 동향과 지역의 입지계수를 분석하고 지역의 지속가능한 성장을 견인할 수 있는 산업정책의 방향을 위한 분석적 근거를 제시한다. 지역의 발전전략을 수립하는 데 중요한 것은 지역의 안정적 성장을 위한 통합된 사회개발 방안의 가능성을 모색해야 한다는 것이다. The characteristics of underdeveloped region are discovered by the relative low portion of manufacture and relative high portion of the section of agriculture, forestry and fishing. The market conditions of Gangwon province are more unfavorable than any other areas in regional growth in general. Based on these understanding, this study will grasp the objective economic conditions and characteristics and pursue an efficient development strategy to accomplish a stable growth of Gangwon province hereafter. For this purpose this study is going to present the basic materials for selecting specific industry which will draw sustainable regional growth by analysing the trends of gross regional domestic products and the locational quotient of the region. In establishing a regional development strategy, it is very important to pursue the possible integrated social development plan for stable regional growth.
유태종,김성순,권봉기 대한상하수도학회 1989 상하수도학회지 Vol.3 No.1
The purpose of this study is to research the effect of anoxic retention time on nitrogen and phosphorus removal by Anaerobic-Anoxic-Oxic process. The anoxic retention times were 0.50hr, 0.75hr, 1.00hr, and 1.25hr, respectively. And the retention times of Anaerobic and Oxic basin were 1.5hr and 1.13hr. The substrate used in experiments was synthetic wastewater. COD concentration was 400㎎/ℓ and influent flow rate of substrate was 24.0ℓ/day. The following conclusions were obtained from the results of this study. 1. The rate of phosphorus removal was high when influent phosphorus concentration was 10㎎/ℓ, but the rate was declined when influent phosphorus was more than 15㎎/ℓ, But, when it was considered as the amount of phosphorus removal per hour(㎎/hr), the removal amount increased as influent phosphorus concentration increased. 2. As anoxic retention time increased, phosphorus removal increased a little, but anoxic retention time couldn't have a great effect on phosphorus removal. 3. The amount of phosphorus removal per MLVSS was almost constant when anoxic retention time was more than 0.75hr at influent phosphorus concentration 5, 15, 20㎎/ℓ, when anoxic retention time was more than 1.00hr at influent phosphorus concentration 10㎎/ℓ. Therefore it is suitable that anoxic retention time is 0.75∼1.00hr in process. 4. The amount of nitrogen removal per MLVSS in anoxic basin and the system increased as Anoxic retention time and influent nitrogen increased. 5. The amount of nitrogen removal per MLVSS in basin was almost constant when anoxic retention time was the same at influent nitrogen concentration 20 and 30㎎/ℓ. And the amount of nitrogen removal per MLVSS was almost constant when anoxic retention time was more than 0.75hr at each influent nitrogen concentration.
코스닥 상장 중소벤처기업의 특허취득 공시가 기업가치에 미치는 영향에 관한 연구
권육상,유왕진 한국경영교육학회 2011 경영교육연구 Vol.26 No.2
This study analyzes the influence on enterprise value of public announcement of obtaining a patent for 172 small venture business listed in KOSDAQ market during the period from January 1st 1999 to June 30th 2010. Summarizing the analysis results, first, public announcement of obtaining a patent leads a value of the company in a positive direction. Second, it is found that the variables such as venture company, IT company, R&D investment to total asset ratio, stake portion of major shareholder have a meaningful positive influence on cumulative average residual(CAR) during the period from 1 day prior to the patent announcement date to 1 day after the date. It can be judged that those variables influence on the decision of the enterprise value during the period. 본 연구는 1999년 1월 1일부터 2010년 6월 30일까지 11년 6월 사이 코스닥시장에 특허취득 공시한 172건의 중소벤처기업을 연구표본으로 R&D투자 활동의 성과인 특허취득 내용을 코스닥시장에 공시하면 해당기업의 주가가 어떠한 반응을 보여주는지 분석하였다. 분석한 결과를 정리하면 첫째, 특허취득 공시가 해당기업의 가치를 긍정적인 방향으로 유도하고 있다. 이는 투자자가 특허취득에 대해 경제적 효익을 누릴 수 있는 가치극대화 지지를 시사한다고 판단된다. 둘째, 특허취득 공시를 할 때 벤처기업, IT기업, 총자산에 대한 R&D투자 비율, 대주주 지분율 등의 변수가 특허공시 이전 1일부터 특허공시 이후 1일까지 구간의 누적초과수익률(CAR: Cumulative Average Residual)에 유의한 양(+)의 영향을 미치고 있음을 발견하였다. 이들 변수가 특허공시 이전 1일부터 특허공시 이후 1일까지 구간의 기업가치 결정에 영향을 미치는 주요 변수임을 설명한다고 판단할 수 있다.
고추 (Capsicum annuum L.) 생육에 미치는 금진광천수의 영향
유지혜 ( J. H. Yoo ),성은수 ( E. S. Seong ),김남준 ( N. J. Kim ),황인성 ( I. S. Hwang ),이재근 ( J. G. Lee ),권순성 ( S. S. Kwon ),김정득 ( J. D. Kim ),최선강 ( S. K. Choi ),심재만 ( J. M. Sim ),길현영 ( H. Y. Kil ),유창연 ( C. Y. Yu 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.3
Geumjin Thermal Water (GTW) from the Geumjin area (Gangneung-city, Korea) has abundance minerals such as selenium, vanadium, calcium and magnesium etc.. In this study, we treated various concentrations of GTW in hot pepper (Capsium annuum L.). GTW treatments of 1-10% showed different phenotypes in plant length, fresh weight, length and width of leaf, color of leaf and number of leaf. The height of plants treated by GTW was taller than control. However, it of them was reduced over 5% GTW treatment. The fresh weight of plant indicated highly as 30.0±0.1g in 5% treatment condition. There was no difference between control and treated plants with GTW in the width of leaf. But, the length of leaves showed highest in 5% (9.2±0.6cm) treatment condition. From these results, we consider that GTW showed the effect on initial biomass of plants.
RCS/ISAR를 이용한 레이다 표적분석 기법 및 소프트웨어 개발
권경일,유지희,정명수,윤태환,Kwon Kyoung-IL,Yoo Ji-Hee,Chung Myung-Soo,Yoon Taehwan 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.2
A development of a software on radar target signature analysis is presented in this paper The target signature includes Radar Cross Section(RCS) prediction, Range Profile(RP) processing and Inverse Synthetic Aperture Radar(ISAR) processing. Physical Optics(PO) is the basic calculation method for RCS prediction and Geometrical Optics(GO) is used for ray tracing in the field calculation of multiple reflection. For RP and ISAR, Fast Fourier Transform(FFT) and Matrix Pencil(MP) method were implemented for post-processing. Those results are integrated into two separate softwares named as Radar Target Signature Generator(RTSG) and Radar Target Signature Analyser(RTSA). Several test results show good performances in radar signature prediction and analysis.