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박남숙,장기화,곽난희,이수현,우용태 國立 昌原大學校 精報通信硏究所 1998 精報通信論文集 Vol.2 No.-
The purpose of this paper is to develope a distance education that would be a courseware for a specific object, which can be available for student to learn the necessary knowledge or function, with no restriction of time or place, using WWW and Oracle DBMS. The distance education was designed in this paper consists of bulletin board, subject information, lecturing schedule, online instructions, questions and answers, submit and confirmation of reports, evaluation of lecturing, reference sites, chatting and discussion room, and data bank. The distance education coupled by WWW and database will change the educational form from one-direction to bi-direction between a teacher and the students. This can also provide a multimedia information to the students through WWW environment with convenient user interface. Those benefits made it possible to offer animated audio-visual materials and search for the information concerned through a hypertext technique. Besides, various kinds of informations were stored at database to increase an effectiveness in managing data. Since both teacher and students, are easy to add new information using the process of instruction to the database, the amount of the stored information in the distance education can be expanded effectively.
Kwak, Gi-Seop,Kong, Jong-Yun,Kim, Min-Woo,Hyun, Seok-Hee,Kim, Woo-Sik The Polymer Society of Korea 2009 Macromolecular Research Vol.17 No.4
This paper describes the out-of-plane order of a liquid crystalline(LC) methacrylate copolymer(3) comprised of a methacrylate(1) with a 4-styrylpyridine moiety as the photo-cyclodimerizable group and a benzoate moiety as the mesogenic group in the side chain, and another methacrylate(2) with a 4-(4-methoxyphenyl)benzoate moiety as the mesogenic group. The composition of 1 and 2 units in 3 was estimated to have a molar ratio of 54.2:45.8 by $^{1}H$ NMR spectroscopy. The X-ray diffraction study revealed that the copolymer forms a partial bilayer smectic structure. The copolymer gave rise to a high out-of-plane order parameter of about 0.74 in a wide LC temperature range of $110{\sim}160^{\circ}C$ after linearly polarized, UV light irradiation and subsequent annealing. Moreover, the external reflection IR analysis indicated that excess UV-light irradiation makes the out-of-plane LC structure of the copolymer appear in a higher and wider temperature range.
Effect of Various Essential Oils in Mono Gastric Animal
Kwak, Woo Gi. Yun, Won. Lee, Ji Hwan. Lee, Chang Hee. Oh, Seo Yong. Oh, Han Jin. Liu, Shudong. Cho, Jin Ho 忠北大學校 農業科學硏究所 2017 農業科學硏究 Vol.33 No.1
From last decades, essential oils have been widely utilized as additives for animal feed as well as humans. Essential oil as an additive has a good effect. In addition, it has attracted attention as an effective additive for antibiotic use and reduction odor emissions in the problems of animal industry. Essential oils are aromatic oils extracted by herbs and plant leaves, petals, stems, husks, roots and are secondary products of plants that display color and odor as hormone components of plants. Essential oils are 100% pure natural ingredients and do not have a harmful effect on body. Most of essential oils are Generally Recognized As Safe (GRAS) and are approved by the US Food and Drug Administration (FDA). In this study, we compared nutrient digestibility, growth rate, blood profiles and odor reduction effects among the essential oils. The purpose of this review is to validate and compare several previously proven effects. Furthermore, it is to summarize and define that the effects of essential oils as animal additives.
Causes and Prevention Method of Gastric Ulcer in Pigs
Lee, Ji-Hwan. Yun, Won. Kwak, Woo-Gi. Lee, Chang-Hee. Oh, Han-Jin. Liu, Shu-Dong. Kim, Doo-Wan. Cho, Jin-Ho 忠北大學校 農業科學硏究所 2017 農業科學硏究 Vol.33 No.1
It is important and is studying the occurrence date of gastric ulcers in pigs in several Western countries. Gastric ulcers were founded in almost all pigs with only a difference in progress, and usually were occurred on the par esophagea in pigs. Also, it is generally difficult to detect until biological signs and symptoms appear. Many studies have shown that gastric ulcers have a wide variety of causes. Gastric ulcers were influenced by particle size in diets. If the particle size in diets is less than 400 microns, gastric ulcers easily occur. In nutritional aspects, gastric ulcers were influenced by fiber, vitamin E, zinc and melatonin. Many studies showed that when the fiber, zinc, melatonin and vitamin E were added in diet, gastric ulcers in pigs decrease. In feeding management, the elements such as straw and feed restriction affected the gastric ulcers of pigs. All these factors connected with a stress in pigs, and stress results in productions of large amounts of excess acid. Because of excessively producing a gastric acid, gastric ulcers occur. However, many people in Korea are interested in the gastric ulcers of pigs. Therefore, further studies on gastric ulcers of pigs should be conducted and researcher in Korea should try to prevent them in livestock industry.
Feeding Value of Whole Crop Cereal Silage for Pigs
Chang-Hee Lee, Won Yun, Ji-Hwan Lee, Woo-Gi Kwak, Seo-Young Oh, Shu-Dong Liu,Seong-Jeong Park, and Jin-Ho Cho 忠北大學校 農業科學硏究所 2016 農業科學硏究 Vol.32 No.2
Feed cost is one of the most important parts of the pig production industry. Whole crop cereal is cheaper price than corn which is contained in a lot of formula feed. In order to increase the nutritional value, whole crop cereals are usually made into silage. The silage method can have an effect of lengthening the storage period, and reduce the difficult to digest dietary fiber through lactic acid fermentation. Fermented whole crop cereal could have an advantage of productivity and healthy in pigs. As results, fermented whole crop cereal could potentially replace as a part of concentrated feed for pigs.
Development of energy-saving elevator control panel for the city railway
Sung-Woo Han,Sung-Kyu Kim,Se-Hyeon Kim,Seon-Hak Kwak,Seon-jin Hwang,Jae-Gyu Shim,Gi-Sig Byun 한국도시철도학회 2015 IJAR Vol.3 No.4
When the voltage of the DC output terminals in the regenerative power generated at the time of rise and fall of the elevator exceeds a certain voltage, it converts the excess power into AC power, to conserve electrical energy by supplying the history of urban railways was demonstrated by developing a possible dual converter elevator control panel for city railway.