상온 유동층에서 층내 수평전열관의 마모특성

한근희,김용철,류정인,선도원,민병무 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.2

대부분의 유동층 연소장치에서 충물질과 비산된 입자에 의한 충내 전열관과 water wall의 전열관 표면의 마모는 계속적으로 골칫거리가 되고 있다. 본 연구는 단면적이 0.15m×0.30m인 상온유동층장치에서 마모하기 쉬운 아크릴 관을 사용하여 유동층에 파묻힌 전열관에 대하여 유동조건과 전열관의 배열효과에 대한 실험적인 연구를 나타냈다. 유동층의 단면적은 0.15m×0.30m이고 높이는 1.0m이다. 층물질은 강모래 평균입도 0.73, 1.24mm의 두 가지와, 평균입도 0.9mm의 무연탄 희재를 사용하였다. 유동층 높이는 0.45m이었다. 마모실험은 조건마다 100시간동안 유동화속도 1.2-1.8m/s 까지 변화시켜 수행하였다. 실험결과 마모율은 유동화속도가 증가할수록 증가하였고, 공기분배기로부터 떨어진 거리가 증가할수록 증가하였다. 그리고 공기분배기로부터 높이 0.6m의 비산영역에 위치한 전열관에 심한 마모를 나타냈다. 전열관의 원주방향에 대한 마모경향은 다른 부분과 비교하여 시계방향으로 4시 방향에서 8시 방향까지 심한 마모가 나타났고, 특히 5시 방향과 7시 방향은 심한 마모를 보였다. Erosion of in-bed tubes and water wall heat transfer surfaces by bed materials and elutriated particles have persistently plagued most fluidized bed combustion (FBC) systems. This papere presents a systematic experimental study of the effects of tube arrangement and flow condition on embedded tube erosion by using erosion-prone acrylic cylinders in a 0.15m×0.30m bench-scale cold fluidized bed. The bed material was two different sizes of river sand and anthracite ash with the average diameter of 0.73, 1.24, 0.90㎜, respectively. The static bed height was 0.45m. Erosion test was performed with the variation of fluidization velocity of 1.2 to 1.8m/s for 100 hours per set. The result shows that the erosion rate increased with fluidizing velocity, with distance from the distributor. The erosion was severe at the tube located in the splash zone of 60㎝ above the distributor. The trend with radial direction shows severe erosion at the 4-8 o'clock clockwise compare to other area, especially 5 and 7 o'clock clockwise.

韓國의 都市部門 最低生計費 推定

安秉根 경북대학교 경제경영연구소 1992 經商論集 Vol.20 No.1

뉴로-퍼지 논리를 이용한 12경락의 양도락진단 시스템의 구현

김병화,한권상,이우철,김성현,최해성,안현식,김도현 대한전자공학회 1997 秋季綜合學術大會 論文集 Vol.20 No.2

특수학교 시설의 설립과정 연구

강병근 建國大學校 附設 産業技術硏究所 1992 논문집 Vol.17 No.-

This is designed to classify, summarize and arrange various sample of the handicapped that are focused on some types of handicap, chronical development and regional characteristics from ancient to present days, This also hows architectural direction on the processing of special institutions and the international transition of its planning, making a comparative study on the establishing of special school in and out of the country. - Accordingly, following proposals should be at issue as a architectural integration. 1. Regional integration in selecting the site for institutions. 2. An attempt to connect the facilities for general education. 3. To make a plan to enable all the handicapped to participate in the special class with regular school curriculum. 4. The integration scheme of dormitory and treatment facility in planning the isolated one. 5. To lead integration of gradual social community and the handicapped.

메타크릴산 메틸과 디에탄올아민의 에스테르 교환반응에 대한 음이온 촉매의 영향

孫秉淸,朴根浩 弘益大學校 1987 弘大論叢 Vol.19 No.2

The transesterification between diethanolamine and methyl methacrylate was kinetically investigated in the presence of zinc compound catalysts at 120℃. The amount of reacted methyl methacrylate was measured by gas chromatography, and the reaction rate also measured from the amount of reactants under each catalyst. The transesterification was carried out in the first order with respect to the concentration of diethanolamine and methyl methacrylate, respectively. The over-all order was 2nd. The apparent rate constant(k') was found to obey first kinetics with respect to. the concentration of catalyst. It shows that according to an increase in basicity of anionic species the rate constant increase, and that a linear relationship exists between ln k and pKa.

建築物의 MC活性化方案

姜秉根 건국대학교 1989 學術誌 Vol.33 No.2

This study is concerned with the practical application of modular coordination (MC) for buildings in order to supply low-cost and high quality buildings on a massive scale by improving the quality of materials and reducing construction cost and to rationalize building industry by modernizing design, production, construction and management. Specifically, this study analyses the effect expected with the application of MC, suggests a5-stage project for the practical application of MC on the basis of the analysis of existing problems in the application of MC, and proposes the establishment of a new organization for research and coordination for MC.

구강악안면 외상환자의 조직손상의 양상 및 정도에 관한 임상적 연구

신효근,소병수,안태섭,진우성,윤철희 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.3

This is a clinical and retropective study on th patients with oral and maxillofacial trauma. This study was based on a series of 917 patients were treated as in-patients, at Chon-buk National University Hospital, during the period of Jan., 1989 through Dec., 1993. The results obtained were as follows : 1. The ratio of men to women were 3.59 : 1 in oral and maxillofacial injuries, 3.92 : 1 in facial bone fractures, and 3.18 : 1 in soft tissue injuries. 2. The oral and maxillofacial injuries occurred most frequently in the third decade(32.2%), and fourth, second, fifth decade in orders. 3. The major etiologic factors were traffic accident(57.4%) and fall-down(17.1%), interpersonal accident(16.6%), and industrial accident were next in order of frequency. 4. The incidence of facial bone fracture was 72.1%, soft tissue injury 58.8%, and dental injury 40.5%. 5. The most common site of fracture were mandible(62.9%) and maxilla(19.9%), zygoma and zygomatic arch(18.7%), and nasal bone(4.7%) were next in order of frequency. 6. The most common type of soft tissue injury was laceration(51.0%). The lesion of soft tissue injuries were mostly 1 or 2 lesions and deep.

고등학생의 여가활동 참가가 학교생활적응에 미치는 영향

신근춘,문병용 江原大學校附設體育科學硏究所 2004 江原大學校附設體育科學硏究所論文集 Vol.- No.27

The purpose of this study would likt to find out reached influence of school life adaptation for senior high school students'leisure activity participation. And I established to attain aim of research such like research subject. First, difference of type for leisure activity about area-sexual distinction·monthly income·pocket money, second, difference of school life adaptation about area·sexual sistinction·monthly income·pocket money, third, reached influence of school life adaptation for leisure activity participation extent, fourth, I established to attain the subject for research that would like to find out relation leisure activity type and school life adaptation. I set up seniou high school make and female students of Kangwon Do Yeongseo area with a population for this research Moreover, the selected group was drawn samples each 2 schools second grade 150 students of C·H area malefemale with stratified cluster random sampling . I used questionnaire totally 496 students for material analysis. I used questionnaire that was made recomposition with proper research. I also used measuring implement that used it - P.E. activity participation of Juvenile and questionnaire for adaptation of school life> (Park Jeong Hyeon 1999) <Survey of type for leisure activity> (Ministry of Culture P.E. 1995). Reliance data of questionnaire for school life adaptation used 'Cronbach'α, the coefficient for reliance data was mentioned 6812_6935. Statistics methods - which were used this research are χ^(2)-test, t-test, one-ANOVA, correlation analysis, multiple regression analysis, two-way ANOVA etc. First, when I analyzed difference of type for leisure activity by area·sexual distinction·monthly income·pocket money, I found that it doesn't have any gap by it besides sexual distinction made difference between sports activity for male students and viewing appreciation for female students. Second, differences of adaptation for school life by area·sexual distinction·monthly income·pocket money made several situations. For instance, areamonthly income made difference teacher's relation·friends relation·classes in school, sexual sistinction made it friends relation·school class, and pocket money made it school rules. Third, reached influence of school life adaptation for leisure activity participating extent showed that participating period affected friends relation, participating frequency did teacher's relation, and participating strength did school classes. Fourth, difference leisure activity type and school life adaptation showed that student who did activity for hobbygeneral education made significant difference.

노안수술후 각막형태검사 변화

박근성,고길환,김용선,이재림,민병무,최시환 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

We prospectively analyzed the corneal topography of 26 eyes in 26 patients who had undergone scleral expansion for correcting presbyopia. We examined 26 eyes of 26 patients which were devided into 2 groups (mean age: 51 years, range 40-60 years) according to type of scleral expansion band, with computerized corneal topographic analysis system. Preoperatively and 5 times postoperatively (1day, 1week, 2weeks, 1month, 2months), quantitative descriptors of corneal topograpgy such as Sim K (simulated keratometry value), SRI(surface regularity index), and SAI(surface asymmetry index) were measured at each visit. The mean follow-up period was 43 days. Sim K of the operative eyes ranged from 0 to 2.5 (mean, 0.93) before operation, and mean 2.24 at postoperative 1 day in group Ⅰ. In group Ⅱ, Sim K was mean 2.20 at postoperative 1 day and decreased thereafter. SRI was from 0.54 to 1.39 and SAI was from 0.09 to 0.45 before operation. After operation, mean SAI was maximum at postoperative 2 week and mean SRI was maximum at postoperative 1 day and decreased thereafter. After two months, it became minimum. This study demonstrates that quantitative topographic change after scleral expansion for correcting presbyopia were great during first 1 week after surgery but this change diminished thereafter. Further long studies are in progress to evaluate the long term effects of this procedure.

국내 패션브랜드의 V.M.D. 현황 고찰 : 주) 한섬의 패션브랜드 '시스템'을 중심으로 In case of the fashion brand 'System' of HanSum co., ltd.

강병석,류근종 홍익대학교 산업디자인 연구소 2003 미술디자인 논문집 Vol.- No.8

The old display has primarily been focused on the aspect of the formative arts rather than on the process of merchandising planning. In recent years, however, the role of professional displayer for visual expression has been getting more and more important by standing out the display itself into bold relief as a direct factor to have a great influence on the sale The effective display is to express the value of a commodity properly. to provide consumers with its information. to make a contribution to promoting its selling and to upgrade a degree of recognition of the brand as well as the shop image according to the main points of its planning. It can be safely said that the display is a strategy that expresses a commodity visually and arouses the willingness for customers to buy it. This study in the V.M.D. status of the domestic fashion brand is suggestive of distinctive features which are a little different from the precedent studies or theories. Compared with the old studies or theories, the most striking contrast lies in the process of obtaining information about fashion, which results from the rapid development and wide use of the Internet. This study also can identify different opinions both on the moving-line plan and on the use of stage properties for the display in the shop in contrast with the old theories It is needless to say that I am not sure that this study reflects the general opinion of all the domestic displayers of fashion brand, not only because its scope is very limited and its method much different from old studies but because the brand name of 'Hand some' corporation, SYSTEM, as a subject of this study has its own unique characteristic. As the brand name of SYSTEM, however, has already preoccupied the market and had an apparent concept, it would be desirable for enterprises or displayers who have similar concept or objectives to the SYSTEM to have an interest in the SYSTEM brand and its display. This study is proceeded with a new approach to delve into the current display, but it has also limitations and limits. The method of the study organizes the content from questions and interviews based on the precedent studies but neither suggests the answer nor develops the verifiable tools to the problems. In this respect, I expect the mature and advanced researches with the better and more qualitative method of the study afterwards.