소각 Plant에서 무촉매 환원 장치의 최적반응조건에 관한 연구

최규관,이길영 大田大學校 環境問題硏究所 2002 환경문제연구소 논문집 Vol.6 No.-

A study was conducted for possibility of optimum application of SNCR to the municipal solid waste incinerator in Taejon city. The major test influencing factors are temperature, kinds of reducing agents, NSR(normalized stoichiometric ratio) and injection point of reducing agents. The result of this study was followed The maximum efficiency is 80% at the condition, urea injection, upper stage injection, NSR = 2, and at 950℃. but the operation condition is not stable, so we need another optimum operation condition. Optimum NSR for ammonia is 1.2 and for urea is 1.5. Optimum temperature for two reducing agents is 950℃. Upper stage is better then middle stage for injection point of reducing agents. The most optimum operation condition of SNCR for municipal solid waste incinerator was followed. Reducing efficiency can be reached to 65%, when we use ammonia as a reducing agent at upper stage injection, NSR is 1.2 and operating temperature is 950℃. But reducing efficiency can be upgraded to 75%, at the same condition, beside urea as a rediucing agent and NSR is 1.5. If we can control the operation condition of SNCR with urea as a reducing agent, we can control the emission concentration of nitrogen oxides belows 32ppm.

보은, 괴산지역 황색종 담배포장의 자갈함량과 전작물별 생육상황 조사

최상진,석영선,배길관 충북대학교 엽연초연구소 2001 煙草硏究 Vol.18 No.-

This studies were conducted to investigate the growth characteristics by gravel contents and pre-crops of Flue-cured tobacco cultivated fields at Boeun and Koesan county extension. The results were summarized as follows. pH, available phosphorous(P2O5), inorganic nitrogen(NH4-N + NO3-N), organic contents, cation exchanging capacity(C.E.C) were much more at Koesan than those of Boeun. The gravel content were approximately from 20% to 70% and its content was much more containable at Koesan than Boeun. Stalk length, stalk diameter, leaf numbers, dry weight, largest leaf, the length and the width were higher at Koesan than Boeun. The growth of tobacco by pre-crop was higher tobacco fields than pepper fields.

復合材料 連結 部位를 갖는 엔진 마운트 設計에 關한 硏究

최원종,김권진,오인택,임동준,홍영길,황명신 한국항공대학교 1993 論文集 Vol.31 No.-

본 논문에서는 초경량 항공기의 엔진 마운트 구조물에 대한 유한요소 해석을 수행하였으며, 구조의 안전성 확보에 중요한 영향을 주는 부분인 복합재료 동체와 엔진 마운트 간의 연결 부위에 대한 해석을 위해 유한요소 프로그램을 작성하였다. 본 연구에 의해 작성된 유한요소 프로그램의 신뢰성을 확인하기 위해 실제로 시편 제작 실험을 실시하여 실험치와 해석치를 비교 검토하였다. The finite element analysis was performed on the ULM's engine mount to verify the structural safety Result showed that proposed engine mount structure has a large margine of safety. Strains and stresses in the vicinity of the joint between a composite fuselage and a metallic engine mount were calculated by the finite element analysis program. Numerical results from the model were compared with the test results. Good agreement was found between experiment and model results.

Ras 단백질 Cysteine Carboxyl Methyltransferase의 특성에 관한 연구

崔暉英,朴光淑,朴吉洪,柳總根 고려대학교 의과대학 1993 고려대 의대 잡지 Vol.30 No.1

To understand the mechanism by which ras oncoprotein exhibits its physiological guanine nucleotide triphosphatase (GTPase) activity and pathological influence such as carcinogenesis, in depth knowledge on posttranslational processing is underscored. In the context, we focus on the biological role of enzymatic carboxyl methylation of C-terminal cysteine in ras family protein. Characterization of ras-protein cysteine carboxyl methyltransferase is the current objectives. Membrane extracts from bovine brain catalyze the transfer of methyl groups from S-adenosyl-L-methionine (AdoMet) to N-acetyl-S-farnesyl-L-cystein (AFC). It was determined by counting the radioactivity from[^(14)C] methyl AFC, the product of the methylation reaction as the α-carboxylmethyl ester derivative of AFC. According to subcellular cell fractionation, significant AFC is 11.1 μM, for AdoMet 3.8 μM and S-adenosyl-L-homocysteine (AdoHcy) was a competitive inhibitor with respect to AdoMet with an apparant Ki=1.8 μM. The change of methyl transferase activity following development of rat brain was analyzed and the highest specific activity was found 38 days after birth. respect to AdoMet with an apparant Ki=1:8 μM The change of methyl transferase activity following development of rat brain was analyzed and the highest specific activity was found 38 days after birth. Our results suggest that cystein carboxyl methyltransferase is distinct entity from protein methylase-Ⅱ (PM-Ⅱ) and associated with membrane in bovine brain conforming to previous reports.

초속경 라텍스개질 콘크리트의 초기수축 및 구속건조수축

최판길,김용곤,심도식,이봉학 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A

Recently, very-early strength latex-modified concrete(below ; VES-LMC) has been developed for repairing and overlaying the old concrete bridge deck. VES-LMC provides the advantage of very-early-strength, as well as high flexural strength, bond strength, durability, resistance to corrosion, reduced water permeability and resistance to damage from freeze-thaw cycles. The compressive and flexural strength of VES-LMC are 21 MPa and 4.5 MPa at 3 hours after concrete placing, respectively. However, VES-LMC would have a relatively large shrinkage at early-age because of reduced water-cement ratio, big water self-dissipation, and rapid hydration reaction. Therefore, the purpose of this study was to evaluate the early-age and restrained shrinkage of VES-LMC, having an experimental variables such as latex contents and cement types. The latex contents included 0%, 5%, 10%, 15% and 20%, and the cement types included ordinary portland cement and very-early strength cement.

조기위암의 형태학적인 분류에 따른 임파절 전이 양상

최은서,강길,박정희,장정환,김권천,김경종,민영돈 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Currently, in the limited cases of early gastric cancer (EGC), endoscopic mucosal resection (EMR) is used for curative treatment. However, its completeness is still controversial. The purpose of this study was to review the suggested indications of EMR. We retrospectively analyzed 234 patients with EGC who underwent curative (RO) gastrectomy. The enrolled cases were further classified into mucosal and submucosal types, and mucosal EGC were further classified according to the size, gross type and histologic pattern. 133 patients had mucosal cancers and 101 patients submucosal. The overall incidence of positive lymph node was 14.1% (33/234), the incidence of mucosal cancer was 8. 3% (11/133), which was significantly lower than that of submucosal, 22% (22/101). Of 133 patients with mucosal EGC, 90 were smaller than 2㎝ in size and the incidence of lymph node metastasis was 5.6% (5/90), compared to 43 of larger than 2㎝ with the incidence of 14% (6/43). According to the gross type classification of mucosal cancer, incidence of lymph node metastasis in protruded type (EGC type Ⅰ, Ⅱa, Ⅰ+Ⅱa) was 15.4% (4/26), nat type(EGC type Ⅱb) 2. 9% (1/35), depressed type (EGC type Ⅱc, Ⅲ) 8.3% (6/72). Lymph node metastasis in differentiated type of mucosal cancer was 6.9% (5/72) and undifferentiatcd type 9.8% (6/61). In this study, there was no single indication free from lymph node metastasis, It is thought that the selection of EMR for the curative treatment of EGC should be considered carefully and more clinical studies with long-term follow up are necessary for EMR to be generally acceptable.

대구시 建築審議制度 變遷에 관한 硏究

최판길,박영홍,하재명 대한건축학회 2004 대한건축학회논문집 Vol.20 No.5

This study focuses on the change of the architectural design-review system that is pointed of committee members, object and criteria of the review in Daegu. Members of the committee were seen to grow up each year. It related with the addition of review-objects and the separation of two committee that intended to proceed the review equitably. The review-objects were more and more easily adjusted in design review. Because it was an intention of the activating construction and administrational changes from city government to its sub-government. The review-criteria were also gradually simplified and changed to be based on the law and regulations. This paper draws four complements through the change of the review system : First, the major and vocation of the committee are needed to control. It is equally needed in each parts of committee members, and it is needed to participate experts in new parts. Second, the review-objects are needed to strengthen the city regulations that present object is over 21 stories and the area is 100,000 square meters. So the important commercial building of the roadside will be included in the review-object. Third, the more objective review-criteria is needed. Because most of the architects want to know the design criteria which the committee consider continuously. Fourth, an addition of the sustainable criteria is needed. These changes are more helpful set of a progressive review system and they will improve the architectural design and its environment.

在來山羊의 飼育能力 向上에 관한 硏究

崔暻文,金榮吉,房極勝 東亞大學校 大學院 1977 大學院論文集 Vol.1 No.-

Experiment were conducted on Korean Native Goat to ascertain the effect of ovine coccidiosis on feedlot Kids. The results obtained were summarized as follows: 1. Oocyst production in each groups of kids reached level of 3 and 4 million oocyst per gram feces 18 to 22 days after kids entered in feedlot. 2. The parasitic development of coccidia was suppressed by SDM significantly (P 0.01) within 1 weeks after drug administration. 3. Hemoglobin and hematocrit value were altered in affected kids but changes in group average were not statistically significant. Total serum protein concentraion were decreased steadly throughout experiment period though SDM suppressed oocyst development within 1 week. 4. Adequate immunity did not develop in any of kids under 6 months old when challange inoculated with 500 thousand oocyst.

태권도 선수의 기질(temperament) 특성에 관한 연구 : 고등학교, 대학교 남, 녀 태권도선수를 중심으로

최영렬,김용길 慶熙大學校 社會體育硏究所 1998 體育科學論叢 Vol.- No.11

The purposes of this study were to analyze the temperament characteristics of Taekwondo players and to give a good advise in relation to game performance and management of athleths and team administration for Taekwondo instructors. Subjects of this study were randomly selected. The sample consisted of 200 male and female high school and collegiate Taewkondo players. The temperament characteristics were assessed by means of a questionnair developed by Igen(1983). The questionnair which consisted of 59 questions include 3 sub-factors such as sincerity(24),introvert and extrovert(24), and neurosis(9). The results of this study showed that there was significant difference(p<0.01) for neurosis between male high school(14.48) and male collegiate(12.14) Taekwondo players. However, no significant difference could be oberved for all temperament characteristics between male and female high school Taekwondo players, between male and female collegiate Taekwondo players. This study suggests that male Taekwondo players were less for neurosis than female Taekwondo players

자연파열된 신혈관근지방종 2례

이길호,선판일,성영훈,최영석,조철희,김철성,장대수 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Renal angiomyolipoma is an uncommon benign tumor of the kidney that consists of smooth muscle, blood vessels and mature adipose tissues. The most common benign renal tumor associated with spontaneous non-traumatic perirenal hemorrhage is angiomyolipoma, because of high vascularity. The ultrasonographic and computed tomographic images are sufficiently characteristic to permit accurate preoperative diagnosis. We report 2 cases of renal angiomyolipoma with spontaneous perirenal hemorrhage which were managed with nephrectomy.