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.

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.

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.

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.

Thermal Decomposition and Stabilization of the Lagoon Sludge Solid Waste after Dissolution with Water

Jong Hyeok Oh,Doo Seong Hwang,Kue-Il Lee,Yun Dong Choi,Sung Tae Hwang,Jin Ho Park,So-Jin Park 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.3

우라늄 변환시설의 라군 슬러지에 함유된 질산염의 안정적 처리를 위해 물 첨가 용해를 실시한 뒤, 여과 케이크의 안정화 특성에 대하여 알아보았다. 물 용해에 의해 대부분의 질산염은 고농도 질산염 용액으로 제거되었으므로, 여과 케이크의 열분해는 에서 하나의 단계로 수행하였다. Muffle furnace를 이용하여 에서 5시간동안 여과 케이크의 열분해를 실시한 결과 라군 1 슬러지에 포함된 U은 의 열분해와 함께 의 형태로 안정화 되었다. 라군 2 열분해 잔류물의 경우에는 열분해 시 생성된 CaO가 냉각과정에서 수분과 반응하여 로 전환되는 것을 TG/DTA 분석과 XRD 분석을 통해 확인할 수 있었지만, 처분장에서 대기중 노출이나 지하수의 침출 등에는 안정한 화합물로 알려져 있으므로, 특별한 첨가제의 첨가 없이 단순 열분해 후 처분이 가능할 것으로 판단된다. Thermal decomposition and stabilization characteristics of the solid cake after the dissolution of nitrate of the lagoon sludge was investigated. Most of the nitrates were dissolved in the water and removed to the filtrate, but small amount of nitrates, calcium carbonate and uranium were remained in the solid cake. The solid cake was thermally decomposed in the muffle furnace at for 5 hours. Uranium, which is in the lagoon 1, was stabilized with decomposition to form. For the lagoon 2, it is confirmed that CaO, which was created by thermal decomposition of the and , was transferred to in the air with water. Because it is known that is stable material, further additives did not need to the stabilization of the thermal decomposition of the lagoons.

Macro-modeling of P-type Feedback Field-Effect Transistor

Jong Hyeok Oh,Faraz Najam,Yun Seop Yu 한국정보통신학회 2022 2016 INTERNATIONAL CONFERENCE Vol.13 No.1

Vitamin D Deficiency is Significantly Associated with Depression in Chronic Kidney Disease Patients

( Jong Hyun Jhee ),( Su-young Jung ),( Hyung Woo Kim ),( Geun Woo Ryu ),( Sul A Lee ),( Seohyun Park ),( Hyung Jung Oh ),( Jung Tak Park ),( Seung Hyeok Han ),( Shin-wook Kang ),( Tae-hyun Yoo ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1

Background: Recent studies have reported significant associations between vitamin D deficiency and depression in the generalpopulation. Even though both vitamin D deficiency and depression are common in patients with chronic kidney disease (CKD), the association between these two prevalent factors remains poorly elucidated. Therefore, we investigated the association between vitamin D deficiency and depression in CKD patients. Methods: The data from Korean National Health and Nutritional Examination Survey between 2010 and 2012 were used. Patients with estimated glomerular filtration rate ≤60 mL/min/1.73 m2 were enrolled. VitaminD deficiency was defined as 25-hydroxyvitamin D3 [25(OH)D3] levels ≤10 ng/mL. The patients were divided into groups with or without vitamin D deficiency. Depression was determined by the EuroQOL-5D (EQ5D) questionnaire.Associations between vitamin D deficiency and depression were evaluated by multiple logistic regression analysis. Results: The mean age was 71.2±9.3 years, and 257 patients (51.9%) were female. The mean 25(OH)D3 levels were 17.9 ng/mL in total, 8.7 ng/mL in vitamin D deficient group, and 18.9 ng/mL in non-vitamin D deficient group. The prevalence of depression in CKD patients was higher compared to the general population (14.3% versus 11.1%, p=0.031). Moreover, the prevalence of depression was significantly higher in patients with vitamin D deficiency than those without vitamin D deficiency (27% versus 13.3%, p=0.022). Multiple logistic regression analysis showed that vitamin D deficiency was a significantly independent predictor of depression after adjusting for age, sex, alcohol, body mass index, hypertension, diabetes mellitus, anemia, suicidal idea, EQ5D index and serum parathyroid hormone levels (odds ratio=6.27, 95% confidence interval=1.57 to 25.05, p=0.009). Conclusions: Depression was highly prevalent in CKD patients. The prevalence ofdepression was higher in CKD patients with vitamin D deficiency. In addition, vitamin D deficiency was a significantly independent predictor of depression in CKD patients. Therefore, determining vitamin D levels might be helpful in predicting depression in these patients.