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히스토아크릴을 이용한 십이지장 궤양 출혈의 지혈 후 발생한 급성췌장염
유재훈,문원,노지훈,구동영,조영화,김기수,윤준모 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.1
Upper gastrointestinal bleeding is common and potentially life threatening medical emergency. Emergency endoscopy is the first choice of diagnostic and treatment measure for patients with active upper gastrointestinal bleeding. Histoacryl should be considered a second-line treatment modality when conventional treatments were failed. However, it might cause several complications. Herein, we report a case of acute pancreatitis developed after histoacryl injection therapy for active duodenal ulcer bleeding. A 71-year-old man was admitted with melena and hematemesis. On emergency endoscopy, a 2 cm sized active ulcer with bleeding from an exposedvessel was seen at the duodenal bulb. Attempts to arrest the bleeding with hemoclipping and submucosal epinephrine injection were tried, but failed. We changed the method to endoscopic histoacryl injection, and obtained hemostasis immediately. A few hourslater, after successful hemostasis, patient complained diffuse abdominal pain. Ultrasonography revealed hyperechoic heterogenous diffuse pancreatic enlargement and right pararenal space fluid collection, this ultrasonographic findings and elevated serum pancreatic enzymes are compatible with acute pancreatitis.
알루미늄 합금과 고장력 강판 접합을 위한 헬리컬 SPR의 단조공정 설계
김원영, 김동범, 김기호, 김도훈, 이인환, 조해용 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2
A self-piercing rivet(SPR) is a mechanical component for joining dissimilar materials. It is used for joining dissimilar material sheets such as aluminum alloy and steel. The self-piercing rivet directly pierces into sheets without drilling sheets beforehand unlike conventional rivets. However, the self-piercing rivet occurs buckling when piercing high strength steel. Therefore, a helical SPR which can pierce high strength steel sheet was designed. In this study, forging process was designed for manufacturing the helical SPR and simulated by using commercial FEM code DEFORM-3D. In the simulation of forging process for manufacturing rivet, process sequence, formability, forging load were investigated. The suitable forging process could be designed by comparisons of simulated results. Experimental trials have been carried out for same conditions as simulated ones. The simulated results agreed with the experimental ones. So, the analytic approach in this thesis is useful to save cost and time in the forging industry
상수원수 수질변화에 따른 전오존 처리효과 및 경제성 평가
최동훈 ( Dong Hoon Choi ),박진식 ( Jin Sik Park ),문추연 ( Choo Yeun Moon ),이재용 ( Jae Yong Lee ),유동춘 ( Dong Choon Ryu ),장성호 ( Seong Ho Jang ),권기원 ( Ki Won Kwon ),이수애 ( Soo Ae Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.4
This study, changes in raw water quality is to indicate on the efficiency of ozone treatment of each pollutant as compared to derive the appropriate operating measures. The appropriate selection for injection rate of pre-ozone and did not inject pre-ozone assess changes in the water. When good water quality, you not injected of pre-ozone to evaluate the economic efficiency of electricity and put the most cost-effective ozone concentration were evaluated. Evaluation remove organic matter and chlorophyll-a concentration level in experiments with each factor of the water DOC> 2.5㎎ / L, THMFP> 70㎍ / L, Chl-a> 30㎎/㎥or less constant process, if you do not need to put pre-ozone showed little impact. It also does not put you in pre-ozone appropriate produce enough power rate savings was calculated as approximately 90 million won. Ability to remove organic materials and the ability to produce disinfection byproducts, and cost-effective decisions by considering the concentration of injection if pre-ozone 1 mg/L was investigated by the appropriate concentration of ozone injection.
정동원,한유리,고형훈 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.1
Today, product a model is diversified according to consumer various request, and product development period and beginning period and cost saving are urgently required. High speed modeling system can serve to reduce expense and time. That is required in product development that product arrived from design to prototype production to cope effectively with a market's request. In this paper, studied to supplement problems to use VLM-ST to solve problem of modeling time of long hours, high price's device induction and preservation etc. that is problem of that do existent rapid prototyping system.
정동원,이승훈 濟州大學校 海洋硏究所 2002 해양과환경연구소 연구논문집 Vol.26 No.-
Sheet metal forming process is a non-linearity problem which is affected by various process variables, such as geometric shape of punch and die. frictional characteristic, etc.. Therefore, the knowledge of the influence of the process variables is needed in the design of sheet metal forming processes. In this study, the simulation tests of deep drawing for friction coefficient between sheet material and tool were carried out to investigate the influence upon sheet formavility. Experimental results were discussed about the defects on the deformation behaviors during the forming process.
신규개발된 제초제 metamifop 현탁농축액제에 대한 급성독성평가
이동연,이상훈,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Metamifop, (R)-2-[4-[(6-chloro-2-benzoxazolyloxyphenoxy]-N-(2-fluorophenyl)-N-methyl propanamide, was newly developed by Dongbu Hannong Chemicals in Korea. In the present study we conducted acute oral toxicity and acute dermal toxicity test. The values of LD_(50) of metamifop was found to be over 5,000 mg/kg for ICR mice. On the other hand, metamifop showed no acute dermal toxicity to SD rats.
정동원,안현길,고형훈 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.1
The static implicit finite element method has been effectively applied to analyze total panel stamping processes, which include the forming stage. Complicated and abnormal large size panel was analyzed by using commercial program called AutoForm. Analysis results examining possibility and validity of the AutoForm software and the factor study are presented. Furthermore, the simulated results for the total panel stamping processes are shown and discussed. Its application is being increased especially in the automotive industry for the cost reduction, weight saving and improvement of strength.
이원옥,윤홍선,정훈,이현동,조광환,김만수 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3
농산물의 저온저장 및 고습조건에서 안전하게 유통할 수 있는 골판지 포장상자를 개발하기 위하여 원지의 구성, 라이너의 발수도, 골형태의 차이에 따라 수분흡습 특성과 압축강도와의 관계를 구명하기 위해 각각 원지특성을 달리하여 이중 양면 골판지를 재료로 사용하여 시험하였다. 온도변화에 따른 골판지 함수율 변화는 골판지 원지 종류, 발수도 차이등에 관계없이 거의 일정한 값을 나타냈다. 상대습도 변화에 따른 골판지의 함수율 변화는 상대습도에 크게 영향을 받는 것으로 나타났으며 골판지의 수분흡습은 발수도 보다는 원지에 구서에 따라 영향을 많이 받는 것으로 나타났다. 또한 수직압축강도는 상대습도가 증가함을 따라 크게 감소하여 상대습도가 수직압축강도에 미치는 영향이 매우 크며 상대습도가 증가함에 따른 수직압축강도의 저하비율은 골판지의 종류에 관계없이 거의 같은 것으로 나타났다. 따라서 저온고습 조건에서 안전하게 내용물을 보호할 수 있는 저온유통용 농산물 골판지 상자의 개선을 위해서는 고품질 원지의 생산기술 개발 및 골판지 상자의 구조개선 연구가 우선되어야 할 것으로 판단된다. The hardness of corrugated packaging box decreased during storage period because of high humidity. Therefore, the strength-decreasing factor of corrugated packaging box had to be investigated to determine the compression strength of the corrugated packaging box. This study was conducted to define the characteristics of moisture absorption as well as compression strength of corrugated fiberboard. (1) The moisture content of the corrugated fiberboard was rarely influenced by the kinds of raw materials and water repellent. However, the moisture adsorption of the corrugated fiberboard was shown to be clearly affected by air temperature changes. (2) The moisture content of the corrugated fiberboard was significantly affected by relative humidity. The moisture adsorption of corrugated fiberboard was also greatly influenced by composition of raw materials rather than water repellent. The results indicated that the improvement of raw materials was more effective than the increase of water repellent of corrugated fiberboard to reduce the moisture adsorption of the corrugated fiberboard. (3) The vertical compression strength was significantly decreased with increasing relative humidity. The reduction rate of vertical compression strength was not charged with the increase of relative humidity, which was regardless of kinds of corrugated fiberboard. (4) For improving the strength of the corrugated packaging box, new technique should be found to develop better quality of raw materials. Moreover, the physical construction of corrugated packaging box should be clearly understood because the corrugated packaging box for the agricultural products was usually used for the circumstances of high humidity and low air temperature.
박동원,이진우,서진기,김영일,정상훈 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2
The experimental binodal curves and tie-lines were determined for solvent-KF salt solution-2-propanol system at 25℃, and those tie-line were used to test thermodynamic consistency. The KF salt solutions were prepared with 5% aqueous solution. The experimental tie-line data were correlated with NRTL and UNIQUAC model, and the parameters and the calculated values of tie-line were predicted. The effect of salt addition on liquid-liquid equilibria was also studied along with increment of salt solution.