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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
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.
송재훈,정기석,강문원,김도진,배현주,서지영,심태선,안중현,안철민,우준희,이남용,이동건,이미숙,이상무,이영선,이혁민,정두련,지역사회획득 폐렴 치료지침 제정위원회 대한감염학회 2009 감염과 화학요법 Vol.41 No.3
A successful therapy of community-acquired pneumonia requires appropriate empirical antimicrobial therapy. Etiology and antimicrobial susceptibility of major pathogens of pneumonia can differ by country. Therefore, an ideal treatment guideline of community-acquired pneumonia should be based on the studies performed in each country. We developed a treatment guideline for community-acquired pneumonia in immunocompetent adults in Korea. This guideline was developed by the joint committee of the Korean Society for Chemotherapy, the Korean Society of Infectious Diseases, and the Korean Academy of Tuberculosis and Respiratory diseases.
양극산화와 절연파괴로 형성한 인산칼슘 함유 티타늄 산화피막의 특성
최원호,이용승,김동환,권용훈,배태성 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.1
This study was performed to investigate the surface properties of electrochemically oxidized pure titanium by anodic spark deposition technique. Titanium plates of 10×10×1 ㎜ were polished sequentially from # 300 to # 1,000 emery paper. They were ultrasonically washed in ethyl alcohol and acetone for 5 min and dried in a desiccator. Titanium plates and titanium screw implants were anodized in an electrolytic solution that was dissolved calcium and phosphate in water. The electrolytic voltage was set in the range of 190-340 V and the current density was 30 ㎃/㎠. The surface oxide film was characterized by X-ray deffractometer(XRD), scanning electron microscope(SEM) and X-ray photoemission spectroscopy(XPS). The main crystal structure of the titanium oxide was anatase type as analyzed with thin-film X-ray diffractometery. The diameter of micropores increased with increasing the spark forming voltage. The porous coatings showed the growth of cell structure and more compact texture with increasing the spark forming voltage. Microcracks were examined in the coating formed at voltage of 340 V. Ca/P ratio in coatings was increased with increasing the voltage.
최종훈,이한영,이원태,이동주,김종열 大韓法醫學會 1999 대한법의학회지 Vol.23 No.2
It is noteworthy that most unidentified dead are unnatural and violent deaths. The accurate identification of a decedent permits certification of death and notification of next of kin. Only then may they proceed with the probate of wills, apply for disbursement of benefits and insurance, and begin to work through the grieving process. Law enforcement agencies need positive identification to pick up the leads of investigation to develop suspects, establish the corpus delicti of homicide and reconstruct the sequence of events of a crime. Agencies and a variety of consultants are involved in recognizing and developing the unique features of a decedent that lead to identification. Cooperative working relations with newspaper and other media will help in publicizing the need for persons with information to come forward diagrammatically. In this paper, 5 individual identification cases in unexpected or homicidal deaths are described. The comparison between the postmortem and antemortem records show that the victims are correctly identified.
양종훈,이동원,김양훈,현명택,김신 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.1
The natural convection driven by a thermal buoyancy force was investigated in a square cavity. The top and bottom walls are cold and hot. respectively. while the vertical boundaries are adiabatic. A control volume approach with a power-law scheme was used to formulate the finite difference equations. The results are presented isotherms. velocity vectors, Nusselt numbers and critical Rayleigh numbers for the ranges of Ra = 1750~20000 and Pr = 0.05~10.0. The critical Rayleigh number increases as Prandtl number decreases. There exists a clockwise unicell flow near critical Rayleigh number, while two cells appear for large Rayleigh number.