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문은이(Eun Yi Moon),이진(Jin Lee),이원용(Won Yong Lee),최청하(Chung Ha Choi),이덕근(Dug Keun Lee),유제만(Jei Man Ryu),정용호(Yong Ho Chung),윤성준(Sung June Yoon),박경배(Kyung Bae Park) 한국응용약물학회 1997 Biomolecules & Therapeutics(구 응용약물학회지) Vol.5 No.3
DW-166HC (^(166)Holmium (^(166)Ho)-Chitosan complex) is a new radiopharmaceutic anticancer agent with a broad anti-tumorigenic spectrum, especially against human hepatic cancer. DW-166HC was evaluated for the appearance of micronucleus in polychromatic erythrocytes (PCEs) of mouse bone marrow cells after subcutaneous arid intravenous single administration. Bone marrow cells were prepared at 24 hr and 48 hr after DW-166HC-I (^(165)Ho-Chitosan complex : cold compound) administration and at 24 hr, 72 hr and 2 weeks after DW-166HC (^(166)Ho-Chitosan complex : hot compound) administration. The results showed there was no statistically significant increase of the numbers of PCEs with micronucleus in all DW-166HC-I administered groups compared with a negative control group but there was statistically significant increase of the numbers of PCEs with micronucleus at 24 hr arid 72 hr in all DW-166HC administered groups, which was recovered after 2 weeks from the drug administration. The results also showed the ratio of normochromatic erythrocytes (NCEs) to PCEs of all DW-166HC-I administered groups was not significantly different from that of a negative controi group but there was significant difference of this ratio at 24hr and 72 hr in all DW-166HC administered groups compared with that of negative group, which was also recovered after two weeks from the drug administration. These results suggested that DW-166HC-I may not cause any chromosomal damage but DW-166HC has in vivo mutagenic potential because of its radioactivity.
염색체 위치 특이적 삽입과 안정적인 유전자 발현을 유도하는 플라스미드 백터의 제작
문영준,강윤성,최지혜,손진숙,민나영,이광호 中央大學校 基礎科學硏究所 2002 基礎科學硏究所 論文集 Vol.16 No.-
Insertion of reporter constructs into the mammalian genome leads to variable gene expression due to position effects at the site of integration. This random integration has limited the gene therapy of human genetic disorders by its undesirable effects. We report here the newly constructed plasmid vector(pIRES-neo-YJ) based on the concepts of homologous recombination and position-independent promoter enhancing of beta-globin matrix attachment region(Glb-MAR). chromosome 7 centromere-specific alpha satellite(alphoid) DNA sequence was cloned into pIRES-neo-YJ for homologous recombination of the cloned gene with the centromeric region of chromosome 7, which is genetically silent. Beta Glb-MAR sequence that allows high levels of transcription independent of the chromosomal site of integration was also inserted into pIRES-neo-YJ to ensure the stable and higher expression of the cloned genes. We expect that pIRES-neo-YJ would provide a valuable tool to eliminate random integration of cloned genes into the undesirable chromosomal region and their short-lived expression which often encounters during the construction of transgenic animals and human gene therapy.
일반적 네트워크에서의 결함 허용 시스템 구성 및 사례연구
문윤호 기전여자대학 1993 論文集 Vol.13 No.-
System reliability has been a major concern since the beginning age of the electronic digital computers. One of the modest ways of increasing reliability is to design fault-tolerant system. This paper proposes a construction mechanism of fault-tolerant system for the general graph topology, this system has several spare nodes. Up to date, fault-tolerant system design is applied only to loop and tree networks. But they are very limited cases. Our new algorithm can be applied to any kinds of topologies without restriction. The algorithm consists of several steps : mimimal diameter spanning tree extraction step, optimal node decision step, original connectivity connection step, and finally redundancy graph construction step.
윤문길,백영호,김대근 한국경영과학회 1994 經營 科學 Vol.11 No.3
Due to the trend of evolution toward a broadband communication network with fiber-optics, the design and operation of fiber-optic network have been received a great deal of research attention recently. Furthermore, even a single fiber link failure in the network may result in severe service loss. Thus, the network survivability becomes an importantissue in planning and designing the network. This survey is on modelling of various fiber-optic subscriber loop network(FSLN) design problems, which are essential ones for providing broadband communication services and B-ISDN services, Models are classified and investigated as either conventional decomposition-iteration approach or integrated design method. To build survivable networks, SHR models are also suggested by ring control schemes. The result of this study will be effectively applied to build a design model for FSLN in the practical applications.
백영호,윤문길 한국항공대학교 경영연구소 1995 경영연구 Vol.2 No.1
Along with the technological advance of fiber optic communications and the demand growth of the multimedia services, the communication network is rapidly broadening its transportation capacity, the bandwidth. The political or socio-economical issues on the Information Infrastructure are also stimulating. The operation and management of the Broadband communication network based on ATM, the evolution of the packet switching, are much different from those of the conventional telephone network based on the circuit switching. This paper describes such differential characteristics of the Broadband communication networks. This paper also investigates classes of line multiplexing schemes and channel allocation methods, and deals with proposed models as possible bandwidth management methods in Broadband communication networks.
공통과학 중 생물 분야에 대한 일반계 고등학생들의 오개념 연구
김윤희,문두호 부산대학교 사범대학 과학교육연구소 2002 科學敎育硏究報 Vol.29 No.-
The major purpose of this research was to identify high school students' misconceptions on biology in high school Common Science Textbook. to find out high school students' misconceptions and cognitive structure in Common Science Textbook, the research was done as following. The research articles on misconceptions in 12 Common Science Textbooks published in Korean and the previous researches were collected and analyzed to find out the biological misconceptions, And in order to find out high school students' misconceptions on biology, a multiple choice test form of questionnaire was developed and composed of 38 items. Then, the final results of questionnaires sent to high schools in Busan were obtained by cluster sampling method and 1861 high school students from 5 high school participated in this study. And the collected data were analyzed to determine any significant differences by sex and the courses. Their responses were collected and the data were analyzed by χ^2-test and one-way ANOVA. The conclusion of the study is summarized as below. 1. From the analysis of the Common Science Textbooks, it was found that some concepts were not demonstrated correctly and the terminology used in the textbooks was different from book to book such as chlorophyll and chloroplast. 2. The difference from the previous researches lay in the fact that misconceptions arouse from biological terminology such as hypertension, respiration, nuclear phase, identical(one-egg) twins, law of independent. 3. There were not statistically significant differences in biological misconceptions between sexes and the courses. 4. Some misconceptions were found to be the same as one that teachers themselves have and the rate of misconceptions of metaconceptions was higher than that of subconceptions. It was because the contents of the current textbooks and conceptions dealt in college entrance exam mainly consisted of subconceptions and teachers also focused their instruction on them.
DC-DC 컨버어터의 스위칭 素子 스트레스 抵減에 관한 硏究
계문호,윤태성 國立 昌原大學校 産業技術硏究所 1993 産技硏論文集 Vol.7 No.-
It is important to reset a transformer in order to reduce the voltage stress over the MOSFET switching device in high frequence DC-DC converter. three different reset methods-R-C-D CLAMP, ACTIVE CLAMP, ZVT-ACTIVE CLAMP- were studied theoretically. It was shown by computer simulation that an ACTIVE CLAMP method was the best one in terms of the lowest voltage stress over MOSFET. So the ACTIVE CLAMP method was selected and implemented, and the operational characteristics were examined experimentally. The experimental results were as good, especially at the voltage stress reduction over the main MOSFET, as simulation`s. These results will be applied to the power supplies in the fields of requiring the small size power supplies.