인구추정을 위한 계량모형의 정립에 관한 연구

오재화,김우혁,김종완 朝鮮大學校 建設技術硏究所 2001 建設技術硏究 Vol.21 No.1

The problems of over population in large cities and over outflow population in small and medium sized cities, and the difference of growth and unbalanced development between them occurred as a big social issue. And since defined as urban plan, urban facilities are being placed on the status of non-execution caused by a number of factor. Accordingly, the purpose of this study is to find out appropriate solutions to various problems created by wrong applied assumption of population. And these solutions are to be applied to establishment of urban planning. Besides assuming the population of urban planning is the most important yardstick of deciding the size of future urban and physical environment. Therefore to development the plan more efficiently, the mathematical methods which is proper to the characteristics of urban must be implied and produced through the outlook based on multi-variate statistical analysis.

기관골 신생증 1예

오영상,이은우,정종혁,문승원,김수현,김동한,양혁승,박정환,박경옥,강성수,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Tracheobronchopathia osteoplastica is a rare disorder of unknown cause characterized by the projection of numerous bony or cartilaginous submucosal nodules into the tracheobronchial lumen with sparing of the posterior membranous portion of tracheobronchial tree. In the past, most of the cases were diagnosed as secondary finding at autopsy. Nowaday, the key component of the evaluation is flexible fiberoptic laryngoscopy and bronchoscopy, which typically demonstrates irregular spicules of subrnucosal bone and cartilage projecting into the tracheobronchial lumen and causing various degrees of airway obstruction. A 45 years old man was visited Sunchon St. Carollo hospital due to discomfort on throat. We saw several nodules just below vocal cord via laryngoscope. The computed tomography revealed multiple small calcified nqdules on trachea and both main bronchi. Pathologic finding of bronchoscopic biopsy showed abnormal proliferation of bony and cartilagious nodules in the tracheal submucosa. These fingdings were consistent with tracheobronchopathia osteoplastica. We report here on a case of tracheobronchopathia osteoplastica with review of literature.

해수중 우라늄 회수를 위한 Acrylamidoxime섬유의 합성과 특성

주혁종,주재오 忠南大學校 産業技術硏究所 1988 산업기술연구논문집 Vol.3 No.2

A fibrous adsorbent containing amidoxime groups for the recovery of uranium from seawater was synthesized through the amidoximation of polyacrylonitrile fiber with hydroxylamine. The infrared spectra of the fiber showed the characteristic absorption peaks of amidoxime, i.e. -OH stretching at 3200∼3400㎝-¹, =C=N- stretching of the hydroxylimino group at 1650㎝-¹and =N-O- stretching of hydroxyimino group at 930㎝-¹. Amidoxime groups containing in the fibrous adsorbent determined by elemental analysis were 2.8 meq/g-Ad. Uranyl ions were not adsorbed on the amidoxime fiber from acidic solution below pH 2. However, when PH of the solution increased to over 3, uranyl ions were adsorbed. The increased in temperature and flow rate of seawater in the adsorption process were effective in increasing the amount of adsorbed uranium. The minimum immersion time to obtain equilibrium desorption in 1N-H₂SO₄is estimated to be 30 min. The concentration factors for uranium and transition metal were in the order of 10, while those for alkali metals and akaline earth metals were in the order of 10∼10¹.

적외선을 이용한 비닐포장 하부 작물 위치예측

곽형석, 사재원, 오종우 忠北大學校 農業科學硏究所 2017 農業科學硏究 Vol.33 No.1

The image with non-contact and non-destructive measurement methods, might provide advantage to analyze and evaluate the condition of crops. It is necessary to develop a device for monitoring crops under the vinyl mulch which was protected from wild bird and weed control. Using digital image processing, the monitoring device for crops under the vinyl was developed. The monitoring system measured temperature distribution between soil and crops using an infrared temperature sensor. Based on the measured data analysis, the location of the crop under the vinyl mulch were estimated.

혐기성 변성 아크릴계 접착제의 제조 및 접착 특성

주혁종,오인석,권호길,최돈묵 忠南大學校 産業技術硏究所 1991 산업기술연구논문집 Vol.6 No.2

An experimental study was performed to prepare the anaerobic acrylic adhesives with TEGDMA(Trietylene Glycol Dimethacrylate), acrylic acid, p-benzoquinnone and CTBN(Carboxyl Terminated Butadiene Nitrile) To characterize the anaerobic modifided acrylic adhesives, tensile shear adhesion strength, DSC, FT-IR, water resistance, chemicals resistance and oil resistance of adhesives were tested. The results obtained in this study could be summerized as follows; 1. Tensile adhesion shear strength was increased with increasing the adding amounts of p-benzoquinone up to 75kgf/㎠ when 0.163wt% added. 2. After a water resistance test for 72hrs, tensile shear adhension strength maintenance was dominant(about 72%) in the C-3 as compared with the others and alkaline solution resistance of adhesives was excellent on the whole as compare to acid solution. 3. The gasoline, light oil resistance of adhesives were very good enough that could be used in the field of mechanical connecting parts.

工業敎育大學의 實驗實習施設 共同活用 및 運營에 關한 硏究

尹錫天,牟相榮,權五憲,千炳善,周赫鍾,李永臣,金健中,羅聲雄,洪錫雨,吳德成,盧泰天 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)

The College of Engineering was specialized to have a sole function for supplying technical high school teachers in 1977 and referred to as the College of Industrial Education according to the Government's policy. The economic impact mainly due to the oil-crises caused a severe problem to this college, namely discrepancy of supply to demand scale. Accordingly the number of student enrollment was to be fluctuated from 479 in 1979 through 800 in 1979 and 900 in 1980 to 430 in 1981. And the engineering departments have been attached to this Engineering Education College since 1981. These circumstanses met singnificant inefficiency in facility operation. This program aims at providing an overall relocation of the college facilities and preparing the practical system to make the joint-operation possible taking into account circulation, academic stream, budget, maintenance, etc. However this study could not get optimal spacing but some trade-off, considering the current situation.

Rifampicin에 의한 것으로 추정되는 위막성 대장염1예

김수현,이은우,정종혁,문승현,김동한,양혁승,오영상,김호동,김도현,박혁,박정환,박경옥,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Pseudomembranous colitis, caused by altering the normal colonic flora and allowing the multiplication of Clostridium difficile, is an deleterious adverse effect of antibiotics. But it is rarely reported by rifampicin. Rifampicin is one of the first line drug in the treatment of tuberculosis and many patients are exposed to its potential adverse effects. We experienced a patient that had abdominal discomfort and hematochezia due to pseudomembranous colitis after receiving antituberculous medication, and which was probably caused by rifampicin. A 82 years old man was admitted with abdominal discomfort and hematochezia for one week. On the past history he had been diagnosed as endobronchial tuberculosis about 4 months ago. Colonoscopy revealed multiple discrete whitish mucosal lesion on rectosigmoid colon, and histologic findings were consistent with pseudomembranous colitis. The antituberculous agents were discontinued and vancomycin was administered. The patient's symptoms were resolved within several days. There was no recurrence after reinstitution of the antituberculous agents excluding rifampicin. We report here on a case of pseudomembranous colitis probably due to rifampicin.

Stabilization of Uranium Sludge from a Conversion Plant Through Thermal Decomposition

Oh, Jong-Hyeok,Hwang, Doo-Seong,Lee, Kue-Il,Choi, Yun-Dong,Hwang, Sung-Tae,Park, Jin-Ho,Park, So-Jin 한국공업화학회 2006 Journal of Industrial and Engineering Chemistry Vol.12 No.5

Isothermal Vapor-Liquid Equilibria for Binary and Ternary Systems Containing Ethyl tert-Butyl Ether, Ethanol, Benzene, and Toluene at 313.15 K

Oh, Jong Hyeok,Park, So Jin 한국공업화학회 2005 Journal of Industrial and Engineering Chemistry Vol.11 No.3

Isothermal vapor-liquid equilibrium data are reported for the binary systems of ETBE + ethanol, ETBE + benzene, ETBE + toluene, ethanol + benzene. and ethanol + toluene using the HSGC static measuring method at 313.15 K. These data show positive deviations from Raoult's law. The binary systems of ETBE + benzene and ETBE + toluene possess no azeotropic points. while ethanol-containing binary mixtures have minimum boiling azeotropes at the measured temperature. All the binary systems can be correlated well with common g^E model equations within 1% of the deviation of the vapor mole concentration. The VLE data were also predicted by the modified UNIFAC (Dortmund) model for the same systems and temperature. The deviations of the vapor phase mole fractions between the predicted and measured values were less than 2% for almost all of the systems. In addition, ternary VLE data for the systems ETBE + ethanol + benzene and ETBE + ethanol + toluene were calculated using the fitted Wilson parameters of the measured constituent binary systems, and also they were predicted using the modified UNIFAC (Dortmund) model.

Isothermal Vapor-Liquid Equilibria for Binary and Ternary Systems Containing Ethyl tert-Butyl Ether, Ethanol, Benzene, and Toluene at 313.15 K

Jong Hyeok Oh,박소진 한국공업화학회 2005 Journal of Industrial and Engineering Chemistry Vol.11 No.3

Isothermal vapor-liquid equilibrium data are reported for the binary systems of ETBE + ethanol, ETBE + benzene, ETBE + toluene, ethanol + benzene. and ethanol + toluene using the HSGC static measuring method at 313.15 K. These data show positive deviations from Raoult`s law. The binary systems of ETBE + benzene and ETBE + toluene possess no azeotropic points. while ethanol-containing binary mixtures have minimum boiling azeotropes at the measured temperature. All the binary systems can be correlated well with common g^E model equations within 1% of the deviation of the vapor mole concentration. The VLE data were also predicted by the modified UNIFAC (Dortmund) model for the same systems and temperature. The deviations of the vapor phase mole fractions between the predicted and measured values were less than 2% for almost all of the systems. In addition, ternary VLE data for the systems ETBE + ethanol + benzene and ETBE + ethanol + toluene were calculated using the fitted Wilson parameters of the measured constituent binary systems, and also they were predicted using the modified UNIFAC (Dortmund) model.