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농업용 저수지 퇴적물 준설과 처리 시범사업의 경제성 평가
유진채,여순식,공기서 忠北大學校 農業科學硏究所 2012 農業科學硏究 Vol.28 No.2
The objectives of this study were evaluating economic efficiency of pilot projects for dredging and treatment in agricultural reservoirs using methods of costs benefits analysis. The pilot projects areas included four locals: Giheung, Seolseong, Dogo and Habin. The projects period assumed 20 years. The net present value of whole pilot projects was estimated 9,143 million Won. The costs benefits ratio was estimated 3.08. The internal rate of returns was estimated 53.4%. The results of evaluating economic efficiency of pilot projects were feasible based on costs benefits analysis
IMT-2000 환경에서 Block Design을 응용한 회의용 인증메카니즘의 설계
이여진,김중태,조영주,유성진,배용근 조선대학교 전자정보통신연구소 2003 電子情報通信硏究所論文誌 Vol.6 No.1
In this paper, we present conference key authentication mechanism by employing an algebraic method on IMT-2000 environment To accomplish this, Symmetric Balanced Incomplete block design is applied for generating the communication key and then this key is distributed to participants Through this technique for creating a conference key and mutual authentications performed based on identification information, the communication protocol is designed The protocol presented minimizes the transmission complexity for generating a conference key On a special case the time complexity is O(v√v), where v is the number of participant. The security of the mechanism, which is a significant problem in the construction of Secure system, can be, proved as computationally difficult to calculate as factoring and discrete logarithms.
이여진,유성진,배용근 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2
Electronic check schemes are more efficient than electronic coin schemes with respect to computational costs and the amount of information exchanged, In spite of these, difficulties in making a refund reusable and in representing the face value of a check have discouraged its development. In this paper, a online electronic check system is presented, which solves the above problems. This system uses the partially blind signature to provide user anonymity and to represent the face value of a check. This partially blind signature is EC-KCDSA using ECC. Then this regards mobile terminals for using M-Commerce. The partially blind signature enables us to make the format of refunds and initially withdrawn checks identical and mobile. Thus, it allows refunds to be reused to buy goods without any limitations.
류광열,강원식,김영호,장해동,홍진태,유환수,윤여표 충남대학교 약학대학 의약품개발연구소 1998 藥學論文集 Vol.14 No.-
The purpose of this study was to determine the antioxidative effects of Rhodiola sachalinensis Rhodiola methanol extract was fractionated sequentially with dichloromethane and butanol. Each Rhodiola fraction (water, MeOH, BuOH and CH_2Cl_2 fractions) showed the potent superoxide dismutase (SOD) activity, and had inhibitory effets on peroxide value of linoleic acid (40~57%) and lipid peroxidation (47~70%) in FE^2+/ascorbate system-induced rat liver microsome. Rhodiola methanol extract also recovered carbon tetrachloride-induced decrease in SOD by 42% and catalase activities by 50%, and had inhibitory effects (54%) on carbon tetrachloride-induced lipid peroxidation in rat liver microsome. These results suggest that Rhodiola sachalinensis has the antioxidative effects.
Defect control for large-scale thin-film composite membrane and its bench-scale demonstration
Yoo, Myung Jin,Lee, Jun Hyeok,Yoo, Seung Yeon,Oh, Jee Yeon,Roh, Jong Min,Grasso, Giuseppe,Lee, Jung Hyun,Lee, Dahun,Oh, Woong Jin,Yeo, Jeong-gu,Cho, Young Hoon,Park, Ho Bum Elsevier 2018 Journal of membrane science Vol.566 No.-
<P><B>Abstract</B></P> <P>Since the inception of membrane-based CO<SUB>2</SUB> separation technology in the late 1970s, a large number of material studies have been performed to improve the material properties of membrane materials and tremendous progress has been made with regard to CO<SUB>2</SUB> separation to increase the trade-off between permeability and selectivity, known as the “Robeson upper bound.” In membrane science, material properties and membrane properties are related but completely different, especially in thin-film composite (TFC) membranes. Compared to the large number of material studies, few studies have been performed on membrane properties, and very few membranes have been successfully commercialized because an extremely thin selective layer is required in CO<SUB>2</SUB>/N<SUB>2</SUB> separation membranes for high CO<SUB>2</SUB> permeance; however, defects are easily generated, deteriorating gas transport properties on a large-scale. In this study, we theoretically analyzed the effect of defects on the gas transport properties of a TFC membrane and introduced a method to control defects during the preparation of large-scale membranes. This work will provide a facile and practical approach to preparing TFC membranes and will be helpful toward extending material studies to real membrane demonstrations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Requirements for a protective layer were proposed by theoretical calculations. </LI> <LI> Effectiveness of using a protective layer was proved by experiments. </LI> <LI> Protective layer coated membrane exhibited high CO<SUB>2</SUB> permeance & CO<SUB>2</SUB>/N<SUB>2</SUB> selectivity. </LI> <LI> Plate-and-frame membrane module was successfully prepared. </LI> <LI> Membrane-based CO<SUB>2</SUB>/N<SUB>2</SUB> separation system was demonstrated in bench-scale. </LI> </UL> </P>
Peritoneal dialysis-related peritonitis due to <i>Halomonas hamiltonii</i> : A first case report
Yeo, Se Hwan,Kwak, Jae Hoon,Kim, Yeo Un,Lee, Jin Suk,Kim, Hyo Jin,Park, Kyoung Hwa,Lee, Jung Sook,Ha, Gyoung Yim,Lee, Jeong Ho,Lee, Jun Yeop,Yoo, Kyung Don Williams & Wilkins Co 2016 Medicine Vol.95 No.47
<P><B>Abstract</B></P><P><B>Introduction:</B></P><P><I>Halomonas hamiltonii</I> is a Gram-negative, halophilic, motile, and nonspore-forming rod bacterium. Although most <I>Halomonas</I> sp. are commonly found in saline environments, it has rarely been implicated as a cause of human infection. Herein, the authors present a case report of continuous ambulatory peritoneal dialysis (CAPD)-related peritonitis attributed to <I>H hamiltonii</I>.</P><P><B>Case presentation:</B></P><P>An 82-year-old male patient who had been receiving CAPD therapy presented to an emergency department with complaints of abdominal pain and cloudy dialysate that had persisted for 2 days. The peritoneal dialysate was compatible with CAPD peritonitis, with white blood cell count of peritoneal effluent of 810/mm<SUP>3</SUP> and neutrophils predominated (60%). Two days after culture on blood agar medium, nonhemolytic pink mucoid colonies showed, with cells showing Gram-negative, nonspore-forming rods with a few longer and larger bacilli than usual were found. We also performed biochemical tests and found negative responses in K/K on the triple sugar iron test and H<SUB>2</SUB>S and equivocal (very weak) response in the motility test, but positive responses to catalase, oxidase, and urease tests. The partial sequence of the 16S rRNA gene of a bacterium detected by peritoneal fluid culture was utilized for a Basic Local Alignment Search Tool search, which revealed that the organism was <I>H hamiltonii</I>. Intraperitoneal antibiotics were administered for 21 days, and the patient was discharged without clinical problems.</P><P><B>Conclusion:</B></P><P>We present here the first case report of CAPD-related peritonitis caused by <I>H hamiltonii</I>, which was identified using molecular biological techniques. Although guidelines do not exist for the treatment of infections caused by this organism, conventional treatment for Gram-negative organisms could be effective.</P>