들잔디 성숙종자로부터 캘러스배양 및 식물체 재분화에 미치는 몇 가지 요인의 영향

이상훈,김범수,원성혜,조진기,김기용,박근제,성병렬,이효신,이병현 Plant molecular biology and biotechnology research 2004 Plant molecular biology and biotechnology research Vol.2004 No.-

In an effort to optimize tissue culture responses of zoysiagrass (Zoysia japonica Steud.) for genetic transformation, factors affecting callus induction and plant regeneration were investigated. MS medium containing 3 ㎎/L 2,4-D was optimal for embryogenic callus induction from mature seed. The plant regeneration frequency of 73.3% was observed when embryogenic calli induced in this medium were transferred to N6 medium supplemented with 0.1 ㎎/L 2,4-D and 5 ㎎/L BA. Among several basic media, MS and N6 medium were optimal for callus induction and plant regeneration, respectively. Regenerated plants were grown normally when shoots transplanted to the soil. A rapid and efficient plant regeneration system established in this study will be useful for molecular breeding of turfgrass through genetic transformation.

슬러지 재자원화에 관한 연구

이주성,공성호,서승원,배성렬,김영채,이기철 漢陽大學校 環境工學硏究所 1997 環境科學論文集 Vol.18 No.-

이 연구는 1993년도에 우리나라의 연간 슬러지발생량이 약 3500만m³에 이르고 있으며, 이들 대부분이 매립되고 있다. 그러나 매립부지의 확보가 점점 어려워 지고 있으며 아울러 매립처분비용도 상승하고 있기 때문에 oil화, 퇴비화등으로 재자원화 하는 방법과 소각후의 소각회를 유효이용하는 방법 등이 연구 개발되고 실용화되고 있다. 슬러지의 oil화는 현재 연구단계에 있으나 앞으로 슬러지의 유효이용기술로서, 가장 좋은 방법이 되리라 기대되고 있다. 그러나 소각후의 소각회의 이용방법은 현재 일본등에서는 실용화 되어 건설자재 등으로 다양하게 이용하고 있다. 우리나라에서도 서울시 등을 비롯한 대도시에서는 하수처리장에서 발생하는 슬러지를 소각한 후에 소각회를 건설 자제용으로서 지자체의 공사에는 반드시 사용하도록 하는 제도를 만든다면 유효이용방법으로 충분한 타당성이 있을 것이다. 이때 소각방법으로는 용융소각방법이 보다 효과적일 것이다. With increasing sewage and wastewater sludge, it has become difficult to dispose the sludge by landfilling and ocean dumping. To solve this problem, efforts have been made to delelop sewage and wastewater sludge utilization technologies in many advanced countries. Some technologies have already been developed; conversion of sludge to compost and fuel, producing artificial light-weight aggregate from ashes. This paper describes the technical status of sludge utilization technologies.

방향성 결합기를 이용한 단일모드 광섬유 무편광기

이동렬,전상민,김용평 경희대학교 산학협력기술연구원 2002 산학협력기술연구논문집 Vol.8 No.-

In this study, we demonstrated passive single-mode fiber depolarizer for WDM optical communications. We simulated that birefringence of fiber-ring is acted as a depolarizer and found the proper parameters. The minimum degree of polarization of -20dB was achieved. Application of this depolarizer includes not only fiber optic sensors but also WDM optical communications with very narrow spectral width.

한글ㆍ영문 겸용 Word Processor System 개발에 관한 연구

이상인,강석건,서창렬,신태민,박규태,여재준,장이한 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2

The design theory and implementation of a word processor system with more efficient processing of Korean and English text are studied. A screen editing method is implemented which is more flexible to handle the texts. Convinient control of the keyboards, cursors moving, texts editing, line marking and block operations are considered. The codes to avoid the complexity and inefficiency which are caused by difference of the code length between the Korean and English characters are reconstructed. File management systems and algorithms for executing the control commands are also studied. As a result, a successful word processor system is designed and implemental which performs a complete screen editing system. The performance of the system includes flexible cursor movement, margin setting, block operations of insertion, deletion and copying any sizes of the line and blocks; and also, the printout routines for size variation of the characters are worked out.

意思決定支援시스템과 專門家 시스템의 統合

李炳烈,李尙曄 又石大學校 1994 論文集 Vol.16 No.-

연폭로 근로자들에 있어서 신(腎)기능 장해 지표에 관한 연구

이상주,홍영습,김성률,김동일,김준연,정갑열 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

A range of indicators is available to assess renal dysfunction in lead exposure. This study was undertaken to find out which indicators were most valuable as markers of renal dysfunction. We selected 75 male workers from the secondary lead smelter, plastic stabilizer and radiator manufacturing industries (the "exposed" group) and 64 male office workers (the "control" group). Blood lead; blood zinc protoporphyrin; urine lead; urine coproporphyrin; δ-aminolevulinic acid dehydratase activity; and urine δ-aminolevulinic acid were chosen as indicators of lead exposure. Blood urea nitrogen; serum creatinine; serum uric acid; N-acetyl-β-D-glucosaminidase; urine albumin; urine α₁-microglobulin; and urine β₂-microglobulin were used as indicators of renal dysfunction. Urine α₁-microglobulin level was significantly associated with the lead exposre level. Blood urea nitrogen, urine N-acetyl-β-D-glucosaminidase and urine α₁-microglobulin levels were highly correlated with indicators of lead exposure. Urine α₁-microglobulin had the highest correlation with other indicators of renal function. In addition, the proportion of subjects with high urine α₁-microglobulin levels showed a gradient with lead exposure. Conclusively, blood urea nitrogen, urine N-acetyl-β-D-glucosaminidase and urine α₁-microglobulin are useful indicators, but urine α₁-microglobulin is the early and the most valuable indicator of renal dysfunction related to lead exposure.

3차원 지그 설계 시스템의 도면 작성 지원 기능의 개발

이상헌,김석렬 국민대학교 생산기술연구소 2004 공학기술논문집 Vol.27 No.-

Modeling and simulation are emerging as key technologies to support manufacturing, which offer great potential for improving products, perfecting processes, reducing design-to-manufacturing cycle time, and reducing product realization costs. Especially 3-D shape modeling and simulation is a very effective tool for the design and production of automotive body assembly lines. Therefore, 3-D CAD systems have been widely adopted in the design of welding jig systems that are the main components of body assembly lines. However, the production process of a jig system still requires 2-D drawings. Therefore, it is necessary to create drawings from 3-D jig models. However, commercial 3-D CAD systems do not provide as convenient tools as 2-D CAD systems, nor specialized functionalities for the jig drawings. To solve this problem, we customized Unigraphics, a commercial CAD system, for the specific jig drafting process. Several drafting utilities have been developed in this project, which are balloon creation, car-line creation, symbol creation, parts list generation, and check sheet generation utilities. By introducing these drafting utilities, a jig system can be drafted more efficiently and reduce the time and cost of the jig design and production.

RED 게이트웨이에서의 응답 메시지 처리 알고리즘

이상민,채현석,최명렬 漢陽大學校 工學技術硏究所 2001 工學技術論文集 Vol.10 No.-

본 논문에서는 RED 게이트웨이간의 전송률을 최대로 유지하며 종단에서 실제로 처리되어 전송되는 패킷의 양을 늘릴 수 있는 응답 메시지 처리 알고리즘을 제안한다. 본 논문에서 제안한 응답메시지 처리 알고리즘을 RED 게이트웨이에 적용하여 패킷의 손실을 줄이고 전송 효율을 높였으며, 모의 실험을 통해 성능의 향상을 확인하였다. 일련의 모의 실험에서는 응답메시지 처리 성능을 분석하고, 차후의 연구 방향을 제시한다. 본 논문은 네트워크 NS-2 시뮬레이터를 사용하여 다양한 TCP 버전의 조합과 RED 게이트간의 연결속도와 게이트의 개수에 변화를 주어 모의 실험 하였다. This paper proposes an act message processing algorithm to increase the throughput at the end of the telecommunication node, when it uses RED gateway to include various TCP versions with keeping the highest throughput between two RED gateways. This paper shows the results in Kbytes/s from a series of simulation experiments designed to analyze the performance of ark message processing algorithm. Using the ns-2 simulator, the simulation results have been conducted by changing the link speed between two RED gateways using the combination TCP Vegas and TCP NewReno.

미국과 싱가포르의 전자무역 지원정책에 관한 비교 연구 : 비정형 전자무역 분야의 사례분석을 중심으로

이성봉,심상렬 한국통상정보학회 2001 통상정보연구 Vol.3 No.1

미국과 싱가포르는 모두 세계에서 가장 우수한 기업 경영환경을 제공하는 국가이다. 그러나 미국이 자유방임형이라고 한다면 싱가포르는 철저하게 계획형이라는 점에서 다르다. 따라서 본 연구에서는 미국과 싱가포르의 전자무역 지원정책의 사례를 분석하고, 상호비교를 통해 우리 나라 전자무역 지원정책에 대한 시사점을 파악하였다. 본 연구의 가장 큰 시사점은 전자무역의 활성화가 기본적으로 민간의 적극적인 참여로 이루어져야 한다는 것이다. 정부의 역할은 주도적인 입장이 아닌 철저한 지원자의 입장에서 수행되어야 한다. 정부가 거래알선 및 e-마켓플레이스 등 전자무역의 핵심적인 활동에 직접적으로 관여하기보다는 관련된 민간기업을 육성하고, 기업들의 전자무역 수행능력을 제고시키며, 기업의 전자무역 활동이 원활하게 이루어질 수 있도록 전자무역 인프라의 확충에 정책의 초점을 맞추어야 한다는 점이다. 향후 전자무역 촉진을 위한 주요 정책의 방향으로 전자무역에 대한 기본적인 인식을 제고 할 수 있는 홍보활동 강화, 전자상거래 지원기관과 전통적인 무역지원기관들의 연계 및 산학연계 활동의 촉진을 통해서 중소 기업에 대한 실질적인 전자무역의 지원, 전자무역 관련 전문인력의 체계적인 양성, 무역 관련 공공정보시스템의 개선 등이 제시될 수 있다.

젖소 足皮膚炎에 대한 오존수의 治療 效果

이수진,조성환,전무형,김덕환,박창식,한홍율,김명철 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

This study was carried out to determine therapeutic the effect of ozonated water therapy on bovine pododermatitis. In addition, bactericidal effect of ozonated water on etiological agent of bovine pododermatitis was examined. The pathohistological examination for the pododermatitis, according to application with ozonated water and ozone ointment was investigated. Thirty healthy cattle were divided two groups(each of 15) : control group (povidone group), treatment group (ozone solution group). Various parameters were evaluated in terms of the lameness score, swelling score, lesion score, WBC count, neutrophil count, pathohistological finding, and antimicrobial action. The decrease of lameness and lesion score were shown in hoof lesions on 14 days after application of ozonated water. Significant decrease of swelling was shown in hoof lesions on 14 days 1 Corresponding author after application of ozonated water(p < 0.01). In hematological findings, WBC count revealed values within normal range. The number of neutrophils was slightly higher than that of normal, however, this was improved on 14 days after application of ozonated water. In pathohistological findings, recovery was rapid macroscopically and microscopically in the treatment with ozonated water on the hoof lesions and ozonated water was effective. In antimicobial action, bactericidal effect was observed in treatment with ozonated water on the hoof lesions and ozonated water was effective.