非線形負荷를 갖는 系統의 過度安定度 解法

吳基鳳 서울産業大學校 1978 논문집 Vol.11 No.1

線形計劃法을 移用한 確率的 運轉模型

李鳳容,李基協,金正勳 弘益大學校 1983 弘大論叢 Vol.15 No.2

In applying linear programming to the production cost for generation planning, the probabilistic features of random loads and random generations cannnot normally be treated. So, in the conventional methods, some simplifications or ommittances are usually made. This paper proposes a new and effieient approach to the "probabilistic" production cost by the stadard linear programming package. The random loads and the random generations are discretized so that the production costs can be in linear form with linear constraints, and the convolution of load and generation is performed. The convolution itself is also a very time-consuming process, but an efficient method is suggeted in the paper. The proposal method is tested in a real scale power system and the various results are compared. From this demonstrations, it is concluded that the proposed method is a powerful tool for the probabilistic production costing and it is expected that the proposed method can further be extended for the generation planning.

마우스 장내에서의 유산균과 이질균의 소장에 관한 연구

李逢起,金周德,崔大卿,柳駿 최신의학사 1975 最新醫學 Vol.18 No.1

The present study has been designed in order to clarify the multiplication and the effect of lactobacilli (shirota strain) on the growth of Shigella dysenteriae (type 1) in vitro and in vivo mouse cecum. The experimental results are summerized as follows. 1. The growth and multiplication of Shigella dysenteriae were inhibited when those organisms were inoculated on the L-broth medium culturedwith lactobacilli for 16 hours (pH 5-0). However, when Shigella dysenteriae was inoculated on the BHI broth medium already cultured with lactobacilli, -the growth and multiplication of those organism were observed, and pH of the medium was changed from 6.3 to 6.1 2. Whe both lactobacilli and Shigella dysenteriae were simultaneously inoculated on the L-broth or BHl broth medium, there were observed decreasing trends of survival of shigella organism, while lactobacilli gradualy grew and multiplied, and pH of the L-broth and BHI broth were changed from 6.8 to 5. 6 an d from 7. 2 to 6.3 respectively. 3. There was no distinct growth and multiplication of lactobacilli in mouse cecum by oral administration, although there was a slight fluctuation in the number of lactobacilli organisms. 4. Shigella organisms was detected with gradual decreasing numbers untill the fourth day after inoculation by mouth. However the survial of Shigella organisms in mouse cecum was rapidly decreased and disappeared within one day by the oral administration of lactobacilli solution. Based on the above experimental results it is deduced that lactobacilli are generally unable to be multiplicated in mouse cecum and to affect pH change of mouse cecum, and that shigella dysenteriae survival in mouse cecum seems not to be affected by pH fluctuation.

대전광역시 양축농가의 축분뇨 관리 실태 및 VOCs 농도 조사

이봉덕,이수기,오홍록,허정민,정기철,김성복 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.1

This study was carried out to investigate the style of livestock house, concentration of malodorous substances of livestock feces and livestock houses in Daejeon area. Among the livestock houses investigated, as most of cow pens(94.5%) have sawdust or chaff on the bottom, there was no leakage of feces out of pen. Most pig pens adopted slury style, but some of them currently use buffering material on the bottom. It is thought that there will be no possible contamination leakage. When it comes to hen house, all the broiler house use litters on the bottom and all the layer house use scrapper. It is also thought that there will be no possible contamination leakage. 3 out of 12 deer pens used buffering material on the bottom, 10 places were maintained in a traditional method, and 7 places left possibility of contamination leakage considering whether the roof was installed or not. The contents of ammonia, amine and volatile fatty acid in fresh feces were lower compared to rotten feces, but the concentration of sulfur-containing matter - hydrogen sulfide, methylmercapthan and ethylmercapthan were higher compared to rotten feces. In the case of malodorous ingredient in livestock houses, only small amount of ammonia and hydrogen sulfide were detected in pig pen and hen house, and other ingredients were not detectable. And those who are engaged in animal husbandry reacted negatively to the use of feed additives for decreasing malodor. In conclusion, it is not worrisome that contamination can be leaked out of animal raising facilities. But if we take into consideration that the point of investigation time is wintry season, there should be more considerate attitude. And feed additives for decreasing malodor need establishing criteria in the manufacturing process.

TFSCAN 검색 프로그램 TFSCAN의 개발

이병욱,박기정,김기봉,박완,박용하 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3

TFD는 기능이 알려진 짧은 DNA sequence(signal)들과 그와 연관된 저널 자료로 구성된 데이타베이스이다. 임의의 DNA에서 이 데이타베이스의 sequence들을 검색하여 signal을 찾는 프로그램으로 Dan S. Prestridge가 개발한 SIGNAL SCAN이라는 프로그램이 사용되고 있는데, 이는 간단한 문자열 비교 알고리즘을 사용한다. 본 연구에서는 계산상 보다 효율적인 검색을 위해서, TFD의 sequence를 검색하기 위한 automata를 구성하는 프로그램과, 이 automata에 따라 signal을 검색하도록 하는 TFSCAN이라는 프로그램을 개발하였다. 검색된 signal에 대한 관련 문헌의 검색에서도 인덱싱 방법을 이용하여 계산 속도를 향상시켰다. 프로그램의 사용을 단순화시켰고, 결과 내용을 signal과 관련된 모든 정보를 일목요연하게 보여줄 수 있도록 구성하였다. 이 프로그램을 Web을 통해서도 사용할 수 있도록, GINet Web 서버에 TFSCAN 입력용 form과 CGI 프로그램을 개발·설치하였다. 본 연구의 특정 Motif 패턴으로 구성된 데이타베이스 검색에서, automata를 응용한 알고리즘을 이용하여 계산상 급격히 향상된 결과를 얻을 수 있음을 알 수 있었는데, 이는 생물학의 여러 패턴 검색에 응용될 수 있을 것이다. 더욱 민감한(sensitive) signal 검색을 위해서, 이와 같이 automata를 활용하고, 이 automata를 최적화하는 알고리즘 연구를 계속하고 있다. TFD is a transcription factor database which consists of short functional DNA sequences called as signals and their references. SIGNAL SCAN, developed by Dan S. Prestridge, is used to determine what signals of TFD may exist in a DNA sequence. This program searches TFD database by using a simple algorithm for character string comparison. We developed TFSCAN that aims at searching for signals in an input DNA sequence more efficently than SIGNAL SCAN. Our algorithms consist of two parts, one constructs an automata by scanning sequences of TFD, the other searches for signals through this automata. Searching for signal-related references is radically improved in time by using an indexing method. Usage of TFSCAN is very simple and its output is obvious. We developed and installed a TFSCAN input form and a CGI program in GINet Web server, to use TFSCAN. The algorithm applying automata showed drastical results in improvement of computing time. This approach may apply to recognizing several biological patterns. We have been developing our algorithm to optimize the automata and to search more sensitively for signals.

접지저항 저감을 위한 도전성 몰탈의 저감효과 특성 해석

오기봉(Oh Kie-Bong),심건보(Shim Keon-Bo),김민성(Kim Min-Sung) 대한전기학회 1999 대한전기학회 학술대회 논문집 Vol.1999 No.7

Monocular Vision-Based Guidance and Control for a Formation Flight

Bong-kyu Cheon,Jeong-ho Kim,Chan-oh Min,Dong-in Han,Kyeum-rae Cho,Dae-woo Lee,kie-jeong Seong 한국항공우주학회 2015 International Journal of Aeronautical and Space Sc Vol.16 No.4

This paper describes a monocular vision-based formation flight technology using two fixed wing unmanned aerial vehicles. To measuring relative position and attitude of a leader aircraft, a monocular camera installed in the front of the follower aircraft captures an image of the leader, and position and attitude are measured from the image using the KLT feature point tracker and POSIT algorithm. To verify the feasibility of this vision processing algorithm, a field test was performed using two light sports aircraft, and our experimental results show that the proposed monocular vision-based measurement algorithm is feasible. Performance verification for the proposed formation flight technology was carried out using the X-Plane flight simulator. The formation flight simulation system consists of two PCs playing the role of leader and follower. When the leader flies by the command of user, the follower aircraft tracks the leader by designed guidance and a PI control law, and all the information about leader was measured using monocular vision. This simulation shows that guidance using relative attitude information tracks the leader aircraft better than not using attitude information. This simulation shows absolute average errors for the relative position as follows: X-axis: 2.88 m, Y-axis: 2.09 m, and Z-axis: 0.44 m.

스파스 行列法에 依한 回路網 解析에 關한 硏究

吳基鳳 서울産業大學校 1974 논문집 Vol.7 No.1

定態安定度 解析에 關한 硏究

吳基鳳 서울産業大學校 1979 논문집 Vol.12 No.1

In accordance with the on-going transition of power supply system from the loop system to the radial system, and the development of major power plants at remoter locations, and the attendant necessity of saving time on the inevitable repair works throughout the ever-expanding distribution network, the analysis of static stability has become an increasingly important subject of electricial engineering technology. This paper examines the nature of static stability and endeavours to offer an effective method of its analysis by means of the πtype model.

A Method for Identifying Splice Sites and Translation Start Sites in Human Genomic Sequences

(Ki Bong Kim),(Eun Bae Kong),(Kie Jung Park) 생화학분자생물학회 2002 BMB Reports Vol.35 No.5

We describe a new method for identifying the sequences that signal the start of translation, and the boundaries between exons and introns (donor and acceptor sites) in human mRNA. According to the mandatory keyword, ORGANISM, and feature key, CDS, a large set of standard data for each signal site was extracted from the ASCII flat file, gbpri.seq, in the GenBank release 108.0. This was used to generate the scoring matrices, which summarize the sequence information for each signal site. The scoring matrices take into account the independent nucleotide frequencies between adjacent bases in each position within the signal site regions, and the relative weight on each nucleotide in proportion to their probabilities in the known signal sites. Using a scoring scheme that is based on the nucleotide scoring matrices, the method has great sensitivity and specificity when used to locate signals in uncharacterized human genomic DNA. These matrices are especially effective at distinguishing true and false sites.