가상 디자인 스튜디오에 의한 도시정보의 공유에 관한 연구

정재희,김능현 경주대학교 건설환경연구소 2000 建設環境論叢 Vol.- No.3

This paper presents a methodology for the development of VRML-based architectual or urban space and a series of projects that speculate on how virtual environments may replace or complement buildings. Virtual design studio allows users from all over the world to access information on any subject, at any time, about almost anyting. In virtual design studio system, we can interactively design and move basic types of three-dimensional objects in a virtual environment with VRML. Moreover, users can share the sample space even if they are geographically separated.

혈액투석 환자에게서 발생한 재생불량성 빈혈 1예

정지용,윤나라,강대웅,오종찬,장재현,선길홍,박경희,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

Aplastic anemia is a disease characterized by pancytopenia in the peripheral blood and hypocellular bone marrow with the fatty infiltration. The causes of the acquired aplastic anemia were usually related to drugs and immune-related diseases. A 34-years old man was admitted due to general weakness. He has been going hemodialysis for 2 years because of end stage renal disease (ESRD) due to chronic glomerulonephritis. At admission, laboratory tests showed hemoglobin 6.2 g/dL, hematocrit 18.0 %, WBC 5,710mm (neutrophil 71.8%, lymphocyte 19.1%, monocyte 5.9%), reticulocyte 1.9%, platelet 93,000/mm, Fe 12.8 ug/dL, TIBC 204 ug/dL, ferritin 941.47 ng /ml, haptoglobin 0.72 g/L, vitamin B12 508.17 pmol/L, folate 24 ng/mL, total protein 6.54 g/dL, albumin 3.76 g/dL, Alk. pohsphatase 79 IU/L, AST 30.0 IU/L, ALT 39.7 IU/L, total bilirubin 0.57 mg/dl, BUN 79.4 mg/dl and creatinine 10.18 mg/dl. Peripheral blood smear showed the normocytic normochromic anemia with anisocytosis. Anemia was diagnosed but it was irresponsive to the recombinant human erythropoietin (EPO) and blood transfusion. In the bone marrow aspiration smear were there the hypoplastic myeloid and erythroid precursors. The bone marrow biopsy section showed the hypoplasia of all components (10-20%) and the fatty infiltration. We have experienced one case of the idiopathic aplastic anemia in a patient going through hemodialysis and we just report it with documentary records. 저자들은 혈액 투석 중인 환자에서 약물, 면역계 이상등의 원인을 발견할 수 없었음에도 재생 불량성 빈혈이 발생한 1예를 경험하여 문헌 고찰과 함께 보고하는 바이다.

장방형내 저온 단일 수평 원관 주위의 동결현상에 관한 실험적 연구

정현철,윤재원,장원택,전승배,이동석,김병철 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1

An experimental study on water in a rectangular cavity with a horizontal cooling tube was carried out to investigate the flow character and thermal behavior in the system. Each experiment was performed with variation of initial temperature and cooling tube temperature. When the cooling tube temperature was -4℃, the supercooling phenomenon was observed regardless of the initial water temperature. And the case of cooling tube temperature was -6℃ with initial temperature was below 4℃, the supercooling phenomenon was also observedin the large region of the test section. When the cooling tube temperature was -10℃, the local region of supercooling phenomenon was observed during the freezing process. And the higher initial temperature was, the higher supercooling degree and the less difference of the ice thickness between upward and downward was observed. It is shown that by controllingthe supercooling phenomena and the cooling tube temperature, it would lead to an increase efficiency of ice making.

2단계 醱酵에 의한 人蔘食醋와 市販食醋의 品質比較

鄭宰顯,趙載敏,崔元碩,曺柱鉉 충주대 2003 産業科學論文集 Vol.11 No.-

본 연구는 인삼의 약리성분과 식초의 기능성을 갖는 인삼식초를 제조하기 위하여 시판 식초와 2단계 발효를 거친 인삼식초와의 품질 을 비교 평가하여 다음과 같은 결과를 얻었다. 가. 인삼식초의 산도는 시판식초보다 약간 낮았으며, pH는 3.7정도로 시판식초보다 약간 높았다. 나. 인삼식초 중에는 fructose, maltose, sucrose, glucose등의 유리당이 존재하였으며 시판중인 식초에는 fructose의 양이 많이 함유되어 있었으며 기타 maltose, sucrose 등도 일부 존재하였다. 다. 인삼식초에는 acetic acid, tartaric acid, propionic acid, lactic acid, malic acid, succinic acid 등의 유기산이 함유되어 있었고 일반 시판식초에는 oxalic acid, citric acid, malic acid, acetic acid등을 함유하고 있었다. We producted the ginseng vinegar through two stages fermentation(alcohol fermentation and acetic acid fermentation). At the first stage, ginseng wine contained 17% alcohol was producted at the 11th day. And through the second stage, acetic acid fermentation ginseng vinegar of which total acidity is 5.8% were produced. In comparison with commercial vinegars for physicochemical quality, acidity of ginseng vinegar was lower than those of commercial vinegars and ph was higher than those of commercial vinegars. The major free sugar compositions in ginseng vinegar were fructose, maltose, sucrose and glucose and in commercial vinegar were fructose, sucrose and maltose. The major organic acid compositions were acetic acid, tartaric acid, propionic acid, lactic acid, malic acid and succinic acid and in commercial vinegar were oxalic acid, citric acid, malic acid and acetic acid.

가토에서 경정맥 이식을 이용한 요도결손 재건술

정재호,이상원,설정현,김효헌 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.5

There are several methods for the reconstruction of partial urethral defect, including split-thickness skin graft, full-thickness skin graft, and preputial flap and free flap. Despite partial success using these methods, most results are unsatisfactory due to frequent complications such as postoperative infection, fistula formation, hair growth and stricture. There have been several pioneering experiments in this field using autogenous vein graft and the results have been controversial. However, the fact that the endothelial lining is replaced by natural urethral epithlium is generally accepted as a positive effect of this method. This experiment was designed to identify the possibility of using vein graft for the reconstruction of partial urethral defect. Two different types of vein graft method were performed in a total of 20 New Zealand White rabbits with partial urethral defect. Firth, for the patch-graft group, a 1×1 cm rectangular vein graft was sutured at a defective area of the same size. Second, for the tubed-graft group, a vein graft segment 1 cm long was replaced at a segmental urethral defect of the same length. Histologic study was performed at three and eight weeks postoperatively in each group. The process of transitional ell epithelial replacement within the grafted vein was uniformly observed in both experimental groups at three weeks postoperatively. At eight weeks postoperatively, the epithelial replacement was almost complete and histologically undistinguishable. In the retrograde urethrogram performed after 8 weeks, the urinary flow in the patch-graft group was normal and showed no stricture, and two of five rabbits in the tubed-graft group showed partial stricture at the graft site. In conclusion, natural urethral epithelium was restored in grafted venous segments irrespective of the type of graft. Partial stricture was observed in 40% of the tubed-graft group while complete reconstruction was possible in the patch-graft group.

반응표면 방법에 의한 느타리버섯 (Pleurotus ostreatus) 균사체 생산의 최적화

鄭宰顯 忠州大學校 1996 한국교통대학교 논문집 Vol.31 No.2

For the improvement of mycelial productivity from pleurotus ostreatus through the submerged cultivation, cultural conditions was optimized, using the central composite design with 5 variables and 5 levels, by the response surface methodology computer program. It was shown that the production of mycelia was highly influenced by the concentration of wheat flour, temperature and inoculum size. The interaction between concentration of wheat flour and temperature was higher than other imdependent variables. Stationary points for the production of mycelia was as follows : wheat flour 75.0g/l, nitrogen source(yeast extract : KNO₃(2 : 1))3.0g/l, temperature 30.0℃, pH 6.5, inoculum size 7.5%(v/v).

Pseudomonas sp.에 의한 말토올리고당의 최적생성 조건

鄭宰顯 忠州大學校 1995 한국교통대학교 논문집 Vol.30 No.2

The study was carried out to produce the Maltooligosaccharides (G2-G6) directly from the culture broth of Pseudomonas sp.. Optimal production conditions of the maltooligosaccharides were 3% inoculum ratio, pH 8.0, temperature 40℃, incubation time 30hrs, respectively. Optimal medium compositions were most effect at 8% amylose, 1.0% yeast extract, 0.25% KH₂PO₄.

유청배지에서 Propionibacterum Feudenreichii와 Lactobacillus Brebis와의 혼합배양에 의한 프로피온산의 생산

鄭宰顯 충주대학교 1997 한국교통대학교 논문집 Vol.32 No.2

Pure cultures of Propionibacterium freudenreichil did not grow in autoclave-sterilized cheese whey(121℃,15 psi, 20min)at whey concentrations greater than 2% (w/v) spray-dried sweet dairy whey. Propionic acid was produced from autoclave-sterilized whey by growing Propionibacterium freudenreichii in mixed culture with Lactovacillus breves. In medium containing 5-12% autoclaved whey solids and 1% yeast extract, the mixed culture pocuced 1.3-3.0% propoinic acid, 0.5-1.0% acetic acid, and 0.05-0.80% lactic acid.All the lactose was consumed. With pH-controlled fementors (pH=7.0),mixed cultures produced at least 30% more popionic acid than cultures in which pH was not controlled.

수직 냉각면이 있는 정방형내 성층유체의 열적거동에 관한 실험적 연구

정현철,윤재원,장원택,전승배,이동석,김병철 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1

This study was investigated by experimentals on the thermal behavior of stratified fluids in the square cavity with the vertical cooling surface by variation of initial temperature and cooling surface temperature and concluded as follows: 1. When the cooling surface temperature of the square cavity was -4℃. the supercooling phenomena was occurred every times regardless initial temperature of fluids and when -6℃ freezing was begun with out supercooling phenomena. 2. The higher the initial temperature was, the longer supercooling phenomena duration was, and the longer the supercooling phnomena was, the higher the temperature of the upper fluids was. 3. When the supercooling phenomena of water was occurred, the rate of temperature decrease of silicon oil was higher and when there was no supercooling phenomena, it was almost same the rate of temperature decrease.

Bovine botulism outbreak associated with incidental consumption of presumably contaminated leftover food

( Jae Won Byun ),( Kyung Hyun Lee ),( Ha Young Kim ),( Soon Seek Yoon ),( Ji Youl Jung1 ),( Woo Seog Jeong1 ),( Jae Ku Oem ),( Jong Soo Lim ),( Myoung Heon Lee ),( You Chan Bae ) 한국예방수의학회(구 한국수의공중보건학회) 2013 예방수의학회지 Vol.37 No.1

Nine cattle among 18 in a native Korean herd died or were euthanized within 3 days. The affected cattle showed cowshed. The pigs and dogs had been fed leftover food originating from nearby restaurants, and the cattle could presumably reach the contaminated food in the pig troughs. Necropsy revealed a few chicken bones and red pepper pieces as well as large amounts of grain and rice straw hay mixed in the rumen. Botulism type D was isolated in the ruminal contents of one of the cattle. We speculated that the outbreak was associated with the cattle incidentally eating presumably contaminated leftover food from the pig trough.