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지규인 한국통신학회 2015 정보와 통신 Vol.32 No.8
측위/항법/시각(Positioning, Navigation, and Timing: PNT) 정보는 교통, 측량, 통신, 국방 등 다양한 분야에서 사용되는 정보로 각국은 이를 주요한 국가 정보인프라로서 파악하여 체계적으로 구축하고 있다. 위성항법시스템으로 대표되는 PNT 체계의 국내외 현황에 대해 살펴보고 국내 PNT 체계 발전 방안을 검토해본다.
지규인 건국대학교 1995 學術誌 Vol.39 No.2
This paper considers the design of predictive control systems characterized by multiplexed measurement and multirate sampling mechanism. Plants outputs are measured In various sampling rates through a multiplexed measurement system where a single common instrument is shared by several controllers. For each controler the output measurements are only available at infrequent rate less than the rate adopted for input sampling. To resolve the problem of infrequent output measurements, intermediate control inputs between actual output samplings are calculated based on the output prediction. A dynamic polling method for multiplexing is proposed and shows an improved control performance.
발생중인 병아리의 배자에서 뇌와 간의 지방산 조성의 변화
지규만,김은미 한국축산학회 1997 한국축산학회지 Vol.39 No.6
This study was conducted to investigate the changes in fatty acid compositions of brain and liver of fertile chicken egg enriched with linoleic and linolenic acids. Sources of linoleic and linolenic acids were safflower(SO) and perilla oils(PO), respectively. Hens of each group were given diet with 1) safflower oil 8%, 2) safflower oil 6%+perilla oil 2%, 3) safflower oil 2%+perilla oil 6% or perilla oil 8%. After 14 days of feeding the diets, the layers were artificially inseminated to obtain fertile eggs. During the incubation, eggs were sampled on the 15th, 17th, 19th and 21st days for determination of fatty acid contents in brain and liver. Brain weights of chick embryos were not different among the dietary Treatments in all incubation days(p$gt;0.05) and its liver weight were similar except for the weight on the 17th incubation day(p$gt;0.05). The levels of linolenic and linoleic acid in liver tissues reflected the patterns of the acid composition in the egg yolk. Linolenic acid contents of SO8%, SO6%+PO2% SO2%+PO6% and PO8% was 174, 488, 1,275 and 1,893 ㎍/liver, respectively. Amount of eicosapentaenoic and docosahexaenoic acid were increased along with the amount of linolenic acid. In brain tissues, docosahexaenoic acid appeared to take the largest proportion of all the fatty acids for all dietary groups. The developing chick embryo had the ability to concentrate and maintain docosahexaenoic acid content in brain compered with a linolenic and eicosapentaenoic acid. Docosahexaenoic acid content of S08% group was lower, 918 ㎍/liver than those of other groups, 2,344∼2,624 ㎍/brain at 21st days(p$lt;0.05). The result indicated that the chick embryo had low ability to convert linolenic or linoleic acid to docosahexaenoic or arachidonic acid. Therefore it might absorb docosahexaenoic or arachidonic acid from egg yolk and concentrate these fatty acids in the tissues according to the specific property of each tissue.
지규만 ( K M Chee ),김춘수 ( C S Kim ) 한국축산학회 1971 한국축산학회지 Vol.13 No.2
This experiment was conducted to increase the nutritive value of perilla meal and to investigate the presence of the growth inhibiting factor in the meal. The first feeding test was carried out with F₁ chicks between W. Rock and W. Cornish which were fed the diets containing 0, 15, 20 and 25% of perilla meal from one day to 4 weeks of age. And two types of perilla meal treated by dry autoclaving at 15 p.s.i. for 30 min. were also fed at 20% level of diet, respectively. The second feeding test was carried out with S.C.W. Leghorn which were fed the diets containing 0, 15 and 25% of perilla meal for 3 weeks. Each perilla meal treated as follows was added into the diets at level of 25%. 1. autoclaved at 15 p.s.i. for 30 min. and washed with water. 2. autoclaved 15 p.s.i. for 30 min. and unwashed. 3. boiled for 30 min. and washed. 4. Soaked with tap water for 8 hrs. and washed. Each experimental diet was prepared to be isonitrogenous and isocaloric. The experimental results obtained were as follows: No significant difference was found in body weight gain between chicks fed no treated high level of perilla meal and fed control diet in both experiments. Although, no significant difference was observed in feed efficiency between chicks of each levels of perilla meal, feed efficiency was decreased as the level of perilla meal was increased. In test Ⅰ, dry autoclaving of perilla meal gave no effect on weight gain or feed efficiency of chicks. In test Ⅱ, the treatments of wet autoclaving, boiling and water soaking of periila meal following washing, respectively, decreased weight gain of chicks compared with that of control group. But chicks fed perilla meal treated by autoclaving-unwashed was increased weight gain more than that of control group with no significant. Decrease in nitrogen retention percent was observed among the groups fed perilla meal at levels of 15 and 25% of no treatment and treated by autoclaving-washing or water-soaking-washed, and these were significant at 5% level. It can be concluded that there is no growth inhibiting factor in perilla meal because chicks fed high levels of perilla meal showed normal growth and fed various physical treatments of perilla meal gave no increase in weight gain.