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Greedy 알고리즘을 이용한 라이브러리 맵핑에 관한 연구
조남경,김재진,음호식 공주영상정보대학 1999 논문집 Vol.6 No.-
본 논문은 원천 컴포넌트의 기능보다 목표 컴포넌트의 기능이 적을 경우 목표 컴포넌트로 동일한 기능을 수행하는 Greedy 알고리즘을 제안하였다. Greedy 알고리즘은 각 컴포넌트의 함수를 비교하여 목표 컴포넌트에 부족한 기능을 수행할 수 있는 잉여 로직을 추가하여 맵핑하는 알고리즘이다. 예제로 선정한 원천 ALU는 3개의 산술기능을 갖고있고 목표 ALU는 2개의 산술기능을 갖고 있는 컴포넌트이다. 본 논문의 Greedy 알고리즘을 이용하여 동일한 기능을 수행하기 위하여 맵핑된 결과 2×1 MUX 1개와 인버터 1개가 추가되어 동일한 기능을 수행하였다. 따라서 실제의 시스템을 구현할 때 CAD 물상에서 라이브러리가 제공되지 않을 경우, 본 논문에서 제안한 HLLM 기술을 이용하여 기본적으로 제공되는 라이브러리를 이용하여 동일한 기능을 수행할 수 있었다.
한국産 황어의 종묘생산에 관한 연구 1. 産卵習性 및 初期生活史
조재권,오성현,노병율,한경호,성기백,박준택 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-
강원도 양양군에 위치한 남대천과 전라남도 섬진강에 분포하고 있는 황어의 종료생산을 위한 기초자료로 産卵習性과 初期生活史에 관하여 관찰한 결과는 다음과 같다. 황어의 産卵期는 자연상태에서 3∼6月이고, 産卵은 흐르는 하천의 자갈 밑에 하였으며, 受精된 卵은 작은 자갈의 표면에 붙어있었다. 알의 크기는 2.70∼3.20㎜(평균 3.00㎜)로 油球는 없었다. 孵化는 평균 사육수온 10.60℃에서 受精 後 300시간부터 시작되었으며, 312시간만에 완료되었다. 孵化 直後의 仔魚는 전장 6.35∼6.87㎜(평균 10.67㎜)로 난황이 거의 흡수되어 後期仔魚期로 접어들며, 입과 항문이 열려있었다. 孵化 後 7∼9일째 後期仔魚는 전장 11.35∼12.30㎜(평균 11.65㎜)로 등지느러미가 생길 부분이 융기하기 시작하였다. 孵化 後 12∼13일째 개체는 전장 12.65∼13.15㎜(평균 12.80)로 이때부터 Daphnia sp.와 Brachionus plicatilis를 攝餌하였으며, 성장이 다소 빨라졌고, 脊索의 끝부분은 45°위로 굽어져 있었다. 孵化 後 43∼45일째의 개체는 전장이 19.55∼22.85㎜(평균 21.95㎜)로 모든 지느러미 줄기가 정수에 달하여 稚魚期로 이행하였다. 孵化 後 50∼52일째의 稚魚들은 전장이 21.54∼27.35㎜(평균 24.55㎜)로 몸의 형태, 체색 및 옆줄이 완전하게 형성되어 成魚에 닮아 있었다. The spawning behavior and early life history of sea rundace, Tribolodon hakonensis were studied. Spawning of T. hakonensis occurs enmasse on bottoms of stream with a spawning season of March to June. The eggs are attached to the under surface of the gravel. The eggs riped were demersal and adhesive, and their diameter were 2.70∼3.20㎜(mean 3.00㎜). Hatching was started at 300 hours after fertilization at mean water temperature 10.60℃. Newly-hatched larvae were 6.35∼6.87㎜ in total length(TL, Mean 6.65㎜), and mouth and anus were not yet opened. 4∼5 days old larvae transformed to postlarva stage and they were 10.25㎜∼11.15㎜ in TL (mean 10.67㎜). As yolk sac were nearly absorbed, mouth and anus were opened. In 7∼9 days after hatching, total length 11.35∼12.30㎜(mean 11.65㎜). The part of the fin-fold at dorsal fin became high. 12∼13 days old larvae were 12.65∼13.15㎜ in TL(mean 12.80㎜), and they fed Daphnia sp. and Brachionus plicatilis actively. In this time the growth rate slightly increased and tip of notocord was flesed on upward. Aggregate numbers of all fin rays were completed at over 19.55∼22.85㎜ in TL(43∼45 days after hatching), at which time the larvae reached the juvenile stage. 50∼52 days old larvae(21.54∼27.35㎜ in TL) were similar in body from, lateral line and color with adult.
Jae‐Il Bang,A‐Na Ha,A‐Ra Cho,Kyeong‐Lim Lee,MD. Fakruzzaman,Il‐Keun Kong 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1
The present research was carried out to evaluate the possibility of female offspring production using artificial insemination buffer (AIB) before artificial insemination (AI). To do it, we carried out the optimization of AIB, making of AIB gun and analysis of affecting AI rate after AIB treatment. AIB made with the base of Tris‐buffer supplemented with L‐arginine and several materials that could be reduced the motility of male sperm compared with female one. This mean that female sperm could be increased the possibility of fertilization with ovum compared with male one. AIB must be deposited into 2nd to 4th cervix by the guide of AIB gun. After 15 min of AIB insertion, frozen semen was deposited into same place after. Total 352 cattle were inseminated with AIB insemination and was not significant difference between AIB and traditional AI rate (56.8 vs. 55.7%). However, AIB AI rate was significantly differs among 12 different farms. The parturition number of cows did not effect on AIB AI rate among 1st to 7th parturition number of cows. The proportion of AIB AI success rates in hanwoo cows was significantly higher than in dairy cows (61.0% vs. 48.7%), but the average AI success rate was not different between AIB and conventional AI (56.8% vs. 55.7%). The female offspring production rate in 2nd to 4th cervix deposition place was significantly higher than in uterus body (77.7% vs. 59.6%, p<0.05). The injection volume of AIB in 5 and 10 ml was significantly higher than in 2 ml (77.7, 78.7 vs. 51.8%, p<0.05), but not different between 5 and 10 ml ABI volume. The best exposure time of AIB in the cervix was 10 and 15 min rather than that of 5 min (79.2%, 77.2% vs. 63.2%, p< 0.05), and so AIB have to expose at least 10 min to get higher female offspring. In conclusion, AIB could be used in AI industry to produce female offspring and also AIB AI can be increased the AI success rate compared with traditional AI rate.
效率的인 都市成長管理를 위한 開發制限區域 接境地域의 管理方案
金瑛,趙宰英,文美景 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-
For classification of the border areas, this study attempts a discriminant analysis using two kinds of main characteristics: land-use variables and land-price variables; consequen1ty the management strategy of the border areas is subdivided into 4 functional types according to hit ratio. The results of this study can be summarized as follows. (1) A-type area requires management strategy connected to town's function because it is similar to high-density-town. (2) B-type area resulted from not only a restrictive land-use control but also in need of environmental preservation under development pressure. Accordingly the management of this type of area requires especially residential participation. (3) Since C-type area is in close connection to the suburbs of towns, the management of this area demands both conservation and development through environmentally affection and sustainable management strategy. (4) The management of D-type area is closely related to that of Green Belt area because it is given more developmental pressure with town expanding in consideration of land-use and land-price. And since this area is used for woodland or farmland, it is necessary to prevent from sprawling development and conserve environment.
CRISPR/Cas9-coupled Recombineering for Efficient Metabolic Engineering of Corynebacterium glutamicum
Jae Sung CHO,Kyeong Rok CHOI,Cindy Pricilia Surya PRABOWO,Jae Ho SHIN,Dongsoo YANG,Jaedong JANG,Cheon Woo MOON,Sang Yup LEE 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
Genome engineering of Corynebacterium glutamicum, an important industrial microorganism for amino acids production, relies heavily on random mutagenesis and inefficient double crossover events. Here, we report a rapid genome engineering strategy to scarlessly knock out one or more genes in C. glutamicum in sequential and iterative manner. Recombinase RecT is used for incorporating synthetic single-stranded oligodeoxyribonucleo-tides into the genome and CRISPR/Cas9 to counter-select negative mutants. We completed the system by engineering the respective plasmids harboring CRISPR/Cas9 and RecT for efficient curing such that multiple gene targets can be done iteratively and final strains will be free of plasmids. To demonstrate the system, seven different mutants were constructed within two weeks to study the combinatorial deletion effects of three different genes on the production of γ-aminobutyric acid, a chemical of much interest in industry. This genome engineering strategy will expedite metabolic engineering of C. glutamicum.
Synthetic sRNA Tool for the Targeted and High-throughput Gene Knockdown in Diverse Bacteria
Jae Sung CHO,Dongsoo YANG,Cindy Pricilia Surya PRABOWO,Mohammad Rifqi GHIFFARY,Taehee HAN,Kyeong Rok CHOI,Cheon Woo MOON,Hengrui ZHOU,Jae Yong RYU,Hyun Uk KIM,Sang Yup LEE 한국생물공학회 2023 한국생물공학회 학술대회 Vol.2023 No.10