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서찬희,김영호 대한대장항문학회 2009 Annals of Coloproctolgy Vol.25 No.3
A coffee enema, which has been suggested as a part of cancer treatment, is a hazardous derivative of colon therapy and has been misused as a treatment for obesity and constipation among the general population. Its proponents claim that caffeine is absorbed in the colon and leads to vasodilatation in the liver, which in turn enhances the process of elimination of toxins. None of this is proven, nor is there any evidence for the clinical efficacy of coffee enemas. We experienced a patient who presented with abdominal pain and bloody stool after receiving a coffee enema to relieve constipation. We report this case of coffee-associated colitis with a review of the relevant literature. A coffee enema, which has been suggested as a part of cancer treatment, is a hazardous derivative of colon therapy and has been misused as a treatment for obesity and constipation among the general population. Its proponents claim that caffeine is absorbed in the colon and leads to vasodilatation in the liver, which in turn enhances the process of elimination of toxins. None of this is proven, nor is there any evidence for the clinical efficacy of coffee enemas. We experienced a patient who presented with abdominal pain and bloody stool after receiving a coffee enema to relieve constipation. We report this case of coffee-associated colitis with a review of the relevant literature.
Ship collision avoidance route planning using CRI-based A∗ algorithm
서찬희,노유정,Abebe Misganaw,Kang Young-Jin,박선영,권철현 대한조선학회 2023 International Journal of Naval Architecture and Oc Vol.15 No.-
This study presents a novel ship route planning algorithm that takes into account both operational economy and safety by integrating the A* algorithm with a collision avoidance algorithm that evaluates the Collision Risk Index (CRI) between the own ship and the target ship. The CRI-based A* algorithm defines a penalty zone, allowing the own ship to explore safe routes based on the International Regulations for Preventing Collisions at Sea 1972 (COLREGs) and performs an adaptive and effective node search on an extended local map grid according to various encounter situations. The proposed algorithm is validated through simulations of head-on, fine-broad crossing, converging crossing, and overtaking encounters, indicating an economical and safe optimum route compared to conventional ship domainbased route planning.
서찬희,장병일,이상재,성한동,전수진,김영묵,이준상 대한감염학회 2003 감염과 화학요법 Vol.35 No.4
저자들은 임상적으로 간낭종 감염이 의심이 가는 환자에서 경피적 배액술로 간낭종이 Salmonella paratyphi A에 의해 감염되었음을 증명하였고 항생제와 경피적 배액술로 성공적으로 치료한 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Salmonellae cause a number of characteristic clinical infections in humans, including gastroenteritis, enteric fever, bacteremia, focal metastatic infection and an asymptomatic chronic carrier state. We report a case of large hepatic cyst infected with Salmonella paratyphi A. A 47-year-old woman was admitted, because of abdominal complains (fullness and pain) and fever. On physical examination, a mass was palpated on right upper quadrant of the abdomen. The computerized tomography of the abdomen showed a large hepatic cyst, but not cystic infection. Aspiration and percutaneous drainage of the hepatic cyst were perfomed for the therapeutic decompression under fluoroscopic guidance. Cultures of the cyst fluid revealed growth of Salmonella paratyphi A. Radiologic contrast media after draining of the cyst fluid revealed no communication between the cyst and bile ducts. Infected hepatic cyst appeared to result from hematogenic seeding. One month later, the patient improved and was discharged without any complication.
지지구조와 헤드-서스펜션-액추에이터의 유연성을 고려한 HDD 유연 회전 디스크-스핀들 시스템의 유한 요소 고유 진동 해석
서찬희(Seo, Chan-Hee),이호성(Lee, Ho-Sung),장건희(Jang, Gun-Hee) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.1
This paper presents a finite element method to analyze the free vibration of a flexible HDD composed of the spinning disk-spindle system with fluid dynamic bearings(FDBs), the head-suspension-actuator with pivot bearings, and the base plate with complicated geometry. Experimental modal testing shows that the proposed method well predicts the vibration characteristics of a HDD. This research also shows that even the vibration motion of the spinning disk corresponding to half-speed whirl and the pure disk mode are transferred to a head-suspension-actuator and base plate through the air bearing and the pivot bearing consecutively. The proposed method can be effectively extended to investigate the forced vibration of a HDD and to design a robust HDD against shock.