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FDM에서 경사면의 표면과 면적오차법의 관계에 대한 연구
전재억,정진서,황영모,김수광,김준안,계중읍,하만경 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.
서수원,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2006 動物醫科學硏究誌 Vol.14 No.-
For retrospective study of canine pyoderma in 45 cases diagnosed at Chungnam National University Veterinary Medical Teaching Hospital between January 2004 and October 2006, incidences of cause, sex, breed, age, season, food, lesional skin and environment was compared. Forty-five dogs were included in this retrospective study. The incidence of canine pyoderma in dermatology cases was 56%(45/80). The mean age of the 45 dogs was 4.89 years. There were 20 males and 25 female. Shunauzer and American Cocker spaniel appeared to be at higher risk of developing canine pyoderma than were other breeds. Distribution of lesions were highly variable. Some dogs in this study(21/45) had underlying diseases, including acute trauma(n=6), allergy dermatitis(5), seborrheic dermatitis(n=4). Recurrence of canine pyoderma was high.
서수원,손정민,윤기영,최호정,박성준,이영원,정성목,신상태,조종기 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2006 動物醫科學硏究誌 Vol.14 No.-
A 12-year-old, female miniature pinscher dog with history of fever and vaginal discharge 3 days ago was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. A diagnosis of pyometra was made by survey of abdominal radiographs and ultrasonography. The uterus appeared as convoluted and tubular appearance filled with anechoic to hypoechoic fluid. Ovariohysterectomy was the choice of cervical patency. Medical therapy for pyometra may be appropriate in bitches that were of breeding age and that were not systemically ill. The surgery was fine. After 1 week, the dog was getting better.
이수훈,김봉석,강태한,송준엽,강재훈,서천석 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
This paper deals with a prediction method of tool life in view of the reliability assessment. In this study, the flank wear was studied among multi-factors deciding the tool wear state. Firstly, tool life was predicted by correlation between flank wear and cutting time, based on the extended Taylor tool life equation of turning data, including parameters of cutting speed, feed rate, and cutting depth. Secondly, each of cutting conditions of endmilling was equivalently converted to apply ball endmill data to the extended Taylor equation. The web-based reliability prediction program for tool life is being developed as one of reliability assessment programs to for the machine tools.
김종수,서준원 선문대학교 첨단과학기술연구소 1999 첨단과학기술연구소 논문집 Vol.4 No.-
정수와 폐수의 고도처리 시스템 설계와 운전에 있어서 용존 유기믈 분자량 분포에 관한 정보는 매우 중요 하다 UF박의 분획분자량과 분자량 분포 결정을 위한 UF시스템을 검증한 결과 시판되는 UP막의 분확 분자량은 실험상의 분획분자량과 유사한 값을 보여 주었다
유산양 유방염에 대한 Chitosan 약침의 치료 효과
황수현,서진석,김덕환,김명철,신상태,전무형,南三郞,김영찬,이우근,표수일 충남대학교 수의과대학 동물의과학연구소 1999 動物醫科學硏究誌 Vol.7 No.-
To improve the therapeutic method for mastitis, treatment effect of chitosan pharmacopuncture was examined in three milking goats(A,B and C). Mastitis was artificially induced in two milking goats(A and B) and one goat(C) was naturally infected case with mastitis. The acupoint used was Yang-Ming and chitosan suspensions(provided from Tottory University, Japan: 30㎎ of chitosan/㎖)were injected to the acupoint with 5㎖/time for 3 days, respectively. As for the change of somatic cells in milk along with chitosan pharmacopuncture, they showed a decreasing tendency after increase on the 3rd day in all udders of B. In addition, as for the change of total leukocyte counts of peripheral blood with chitosan pharmacopuncture, they showed a decreasing tendency after increase on the 3rd day in B and C except A which showed a increasing tendency until on the 7th day. In the change of neutrophil/lymphocyte(N/L) ratio, increasing tendency was seen in A and C but increasing tendency after slight decrease was observed in B. Further, in the change of serum total protein and A/G ratio, serum total protein content was decreased after slightly increase on the 3rd day in A, and they were decreased after increase until on the 7th day in B and C, respectively. As for the change of A/G ratio, different pattern increasing tendency was shown in A, B and C.
김종수,이국희,서준원 선문대학교 ·중소기업기술지원연구소 1999 선문공대 연구/기술 논문집 Vol.4 No.1
천안 제3산업단지 폐수종말처리장의 초기 시운전 3개월 동안 각 처리공정의 처리효율을 분석하고 조속한 정상운전을 위한 연구가 수행되었다 실제기준보다 낮은 유입수의 유량과 수질로 인하여 폐수종말처리장 각 처리공정의 효율은 낮은 것으로 나타났으나 설계기준에 부합되는 유입수가 유입되는 경우 총괄직 처리효율은 방류수 수질기준을 만족할 수 있는 것으로 판단된다 폐수종말처리장이 정상적으로 가동되기 위하여 유입수의 유량과 수질이 만족되어야 하며 매립지 침출수의 투입에 의한 빈부하의 방지는 질소와 인의 부하량을 높여주기 때문에 공정의 변형이 요구된다 폐수종발처리장에 적용되는 환경영향평가상의 방류수 수질기준을 만족하기 위하여 추가의 제거공정이 필요하며 산업 단지 입주업체의 증가는 유기물 부하를 높일 수 있으나 정상가동을 위하여 적절한 수질분석이 이루어져야 한다 The start-up operation of wastewater treatment plant at Chunan 3rd industrial complex was carried out to accelerate steady-state operation by evaluating each treatment process for three months The significantly lower values of flow rate and biodegradable organic matter in influent than those of design criteria significantly affected the performance of the treatment plant, however, the treatment plant would be able to satisfy the effluent discharge limits if the characteristics of influent met design criteria The combined treatment of leachate from municipal solid waste landfills to prevent low organic loadings required the variation of plant processes for additional removal of N and P due to eutrophication of receiving waterbody. Additional process would be required to meet the stringent effluent discharge limits by environmental impact statement. Since the number of dischargers at the industrial complex is expected to grow, regular analysis of water quality is required for effective treatment of wastewater
마이크로파 용융삽입법을 이용한 생분해성 나노복합체의 제조
하원조,신준식,송승욱,김준호,손세모,박성수 한국환경과학회 2004 한국환경과학회지 Vol.13 No.4
The purpose of this study was to investigate the possibility of application of microwave energy for the fabrication of polymer/clay nanocomposite. APES/Clay nanocomposites were prepared at 130℃ for 30min with various content of clay by melt-intercalation method under classical and microwave heating source. APES/Clay samples were characterized by the means of X-ray diffractometry(XRD), thermal gravimetric analysis(TGA), and rheometric dynamic analysis(RDA). It was found that intercalated or exfoliated state was obtained in the samples according to the condition of organic modification, clay content, and heating source.