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김찬중(Chan-Jung Kim),김규식(Ku-Sik Kim),강호영(Ho-Young Kang),진여화(Yeo-Hwa Jin),이봉현(Bong-Hyun Lee) 한국소음진동공학회 2010 한국소음진동공학회 학술대회논문집 Vol.2010 No.10
The direct design modification of problematic component is disallowed in order to sacrifice other major factors such as a stability of system or a major performance. So, the best design policy is to revise the immature structural mechanism under the minimal design change as soon as possible. For this, the paper presents a new design sensitivity analysis based on transmissibility ratio (TR) of response acceleration to find a proper candidate for the minimal design modification. The new sensitivity analysis is based on the fact that the sensitivity of TR over a small design change is inversely proportional to the magnitude of TR. The theory of proposed design sensitivity analysis is simulated with a simple five-degree-of-freedom system and confirms that the sensitivity result is well matched with the variance of TR over a dynamic change. Then, new methodology is applied for a linear elastic specimen to detect the most sensitive node over a design change using measured acceleration data during uni-axial vibration test. The physical verification of the sensitivity method is conducted on the CAE model of a linear elastic specimen by adding concentration mass and the vibration fatigue of the simple specimen is analyzed to estimate the relationship between fatigue behaviors and sensitivity consequences.
Mallory-Weiss Syndrome 을 동반한 위 아니사키증 1예
김영호,김규식,김영관,조연희,곽재영,이영록,이명기,조성구,박상모,구소영 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.5
Anisakiasis is an infection in humans caused by larval nematodes of the family Anisakidae and is encountered in people who eat inadequately prepared raw, salt-water fish or $quot;sashimi$quot;. This clinical syndrome is characterized by severe cramping abdominal pain, nausea, and vomiting. Because Koreans like to eat raw fish, anisakiasis of the stomach has been reported occasionally, but the incidences of upper gastrointestinal bleeding caused by anisakiasis has been very rare. The present case is a 30 year-old male Admitted with an episode of hematemesis. A gastrofibroscopy revealed a mucosal laceration and the larva of Anisakis on the esophagogastric junction. We report one case of Mallory-Weiss Syndrome due to gastric Anisakis larva, confirmed by an endoscopy.
김영호,이연수,김규식,김영관,김재권,이영록,조성구,박상모,구소영 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.3
Gastric angiodysplasia may be responsible for up to 2% to 6% of upper gastrointestinal bleeding. Moreover, gastric angiodysplasia may be particularly difficult to treat and is usually associated with a high rebleeding rate. Bleeding due to gastric angiodypsplasia is usually treated by various endoscopic approaches, including argon and Nd:YAG laser photocoagulation, monopolar or biopolar electrocoagulation, heater probe, or injection. Associated complications of these methods, however, such as perforation, acute bleeding during the procedure, or delayed massive hemorrhage have been reported. Recently a few reports have been suggested that endoscopic ligation therapy is a safe, effective treatment for gastric angiodysplasia. A 70-year-old man, who had undergone subtotal gastrectomy for perforation of a duodenal ulcer for 20 years, was admitted due to melena and dizziness persisting for 1 week. A gastroscopy revealed a single angiodysplasia with active bleeding just above the anastomotic site of the remnant stoach. Endoscopic ligation therapy was performed successfully and the bleeding stopped immediately after endoscopic ligation. Since then, no recurrence of bleeding has been reported to date.
김영호,김규식,김영관,이용희,이명기,곽재영,조연희,이영록,조성구,박상모,구소영 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.5
Spindle cell carcinoma of the esophagus containing both carcinomatous and sarcomatous elements is rare, accounting for approximately 1- 2% of all esophageal neoplasms. Terms used to describe this lesion include carcinosarcoma, pseudosarcoma, polypoid carcinoma, pseudosarcomatous squamous cell carcinoma and spindle cell variant of squamous cell carcinoma. Spindle cell carcinomas were originally classified as carcinosarcomas or pseu- dosarcomas, depending on the morphology and bilologic behavior of the particular lesian. However, pseudosarcoma and carcinosarcoma appear to be the same pathologic entity with varying degrees of anaplastic spindle cell metaplasia of the carcinomatous portion of the tumor. Thus, these lesions have been clsssified together as spindle cell carcinomas. A 59 year-old man who experienced weight loss for 4 months was hospitalized as a result of suffering from dysphagia for 2 months. A diffuse bulky protruding mass with superficial ulceration and easy friability on 25 to 35 cm from the incisors, which invaded the right intermediate bronchus and involved the right paratracheal and subcarnial lymph nodes, were obsetved in esophagogram, endoscopy and chest CT. Pathologic finding, including immunoreactivity to cytokeratin and vimentin, was consistent with spindle cell carcinoma. We report a case of spindle cell carcinoma of the esophagus.