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강봉수(Bong-Soo Kang),박문식(Moon-Sik Park) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
This paper presents the design concepts of a protector for a launch reconnaissance robot which is to be deployed on hazard regions for data-collection. The protector is capable of protecting a reconnaissance robot inside from shock and vibration induced during the whole process of launch, flight, and landing. Since the outer shells of the protector open wide automatically by an unlocking mechanism on the landing stage, the reconnaissance robot can get out of the protector easily and move around for its mission. Dynamic behaviors of the protector containing the robot under external shock are carefully investigated by the both of simulations by ABAQUS and experimental tests with a drop-table.
강봉수(Bong Soo Kang),박문식(Moon Sik Park) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.8
본 논문은 원거리에 떨어진 작전지역으로 정찰로봇을 발사하여 투하하기 위해서 필요한 보호체의 설계개념에 대해서 서술한다. 개발된 보호체는 발사, 비행, 착지과정에서 발생하는 외부의 충격으로부터 내부에 위치한 정찰로봇을 보호하며 목표지점에 도달하게 되면 해제기구에 의해 자동으로 보호체 외피가 분리·개방되어 내부의 정찰로봇이 용이하게 보호체를 이탈하여 정찰임무를 수행하도록 한다. 보호체와 정찰로봇의 유한요소 모델링을 통해서 지면과의 낙하충돌에 의한 충격해석을 수행하였으며 실제 실험결과와도 비교하여 모델링의 유효성을 분석하였다. 낙하테이블을 이용한 충격시험을 통해서 실리콘 재질로 충전된 보호체가 외부의 충격을 효과적으로 완화하여 내부의 정찰로봇을 보호하고 있음을 관찰하였다. This paper presents the design concepts of a protector for a launch-reconnaissance robot that is to be deployed for data-collection in hazardous regions. The protector protects the reconnaissance robot inside from shock induced during the process of launch, flight, and landing. Since the outer shells of the protector are automatically opened wide by the unlocking mechanism during the landing stage, the reconnaissance robot can easily exit the protector and move around to carry out its mission. We carefully simulated a finite-element model of the protector with the robot and compared the results with the actual dynamic behavior of the system. Shock- response tests using a drop-table showed that the proposed protector filled with silicon material successfully attenuated external shock.
2세대 약물 용출 관상동맥 스텐트 삽입 후 급성 심근 경색으로 병발한 관상동맥 연축 1예
김중근 ( Joong Keun Kim ),이신은 ( Shin Eun Lee ),박문식 ( Moon Sik Park ),윤소희 ( So Hee Yun ),이나은 ( Na Eun Lee ),이재운 ( Jae Un Lee ),이동엽 ( Dong Yub Lee ),박종필 ( Jong Pil Park ),전성희 ( Sung Hee John ),임지현 ( Ji Hyu 전북대학교 의과학연구소 2012 全北醫大論文集 Vol.36 No.1
Although several investigators have reported the coronary artery spasm after coronary artery stenting, all previous reports, coronary spasm after drug-eluting stent (DES) placement was occurred in first generation DES, such as sirolimus-eluting (Cypher®) and paclitaxel-eluting stents (Taxus®). Clinical relevance is unknown, the underlying mechanism may be delayed vascular healing due to toxic effects of the sirolimus and paclitaxel to endothelial cells (EC). The second-generation DES, such as everolimus-eluting (Xience V®) and zotarolimus-eluting stents (Endeavor®), are proving to be significantly more effective and safer than the first-generation DES.1)2) We report a patient with severe coronary artery spasm lead to myocardial infarction after second generation DES implantation at the site of detectable atherosclerotic lesion.
요석증이 초기 증상으로 발현된 제1형 다발성 내분비 선종이 동반된졸링거 엘리슨 증후군
이나은 ( Na Eun Lee ),이영재 ( Young Jae Lee ),윤소희 ( So Hee Yun ),이재운 ( Jae Un Lee ),박문식 ( Moon Sik Park ),김중근 ( Joong Keun Kim ),김지웅 ( Ji Woong Kim ),조진웅 ( Jin Woong Cho ) 대한소화기학회 2013 대한소화기학회지 Vol.61 No.6
Zollinger-Ellison syndrome (ZES) is characterized by gastrinoma and resultant hypergastrinemia, which leads to recurrent peptic ulcers. Because gastrinoma is the most common pancreatic endocrine tumor seen in multiple endocrine neoplasia type I (MEN 1), the possibility of gastrinoma should be investigated carefully when patients exhibit symptoms associated with hormonal changes. Ureteral stones associated with hyperparathyroidism in the early course of MEN 1 are known to be its most common clinical manifestation; appropriate evaluation and close follow-up of patients with hypercalcemic urolithiasis can lead to an early diagnosis of gastrinoma. We report a patient with ZES associated with MEN 1, and urolithiasis as the presenting entity. A 51-year-old man visited the emergency department with recurrent epigastric pain. He had a history of calcium urinary stone 3 years ago, and 2 years later he had 2 operations for multiple jejunal ulcer perforations; these surgeries were 9 months apart. He was taking intermittent courses of antiulcer medication. Multiple peripancreatic nodular masses, a hepatic metastasis, parathyroid hyperplasia, and a pituitary microadenoma were confirmed by multimodal imaging studies. We diagnosed ZES with MEN 1 and performed sequential surgical excision of the gastrinomas and the parathyroid adenoma. The patient received octreotide injection therapy and close follow-up.
김운학,유영화,박문식 안성산업대학교 2002 論文集 Vol.34 No.-
Several considerations on structural safety of connection part in Finger-Type expansion joint system were presented in this paper. Special considerations were focused on the compressive strength of sealant concrete, the stress of anchor bolt through introducing prestressing force and he reasonability on the magnitude of prestressing force. Tow-and three-dimensional finite element analyses using MIDAS have been performed to check the structural safety of the expansion joint system. The analysis results showed that the excessive compressive stress acting on concrete can be dispersed or reduced only when over 40% of maximum tensile stress acting on bolt obtained by hand calculation is added to the prestressing force. And the design compressive strength of sealant concrete over 400 kgf/㎠ is reasonable, but more attention should be paid to quality control and construction management even though he design value of 500 kgf/㎠ in original design can improve a structural safety.
중심성 신경세포종 : 증례보고 A Case report
김문철,박문식,이상평,김용진,최기환,여형태,이정길 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.5
Arare case of intraventricular central neurocytoma in 17-year-old male is reported. The patient had diffuse headache and diplopia. Radiologic findings displayed obstructive hydrocephalus and a large. well-demarcated intraventricular mass lesion obstructing the foramen of Monroe. The tumor arouse from the splenium of corpus callosum. It was removed successfully using two different approaches after extraventricular drainage of the cerebrospinal fluid(CSF). Histologically. the tumor showed pathological features as that of oligodengroglioma on the light microscope. In immunohistochemical examination. glial fibrillary acidic protein(GFAP) was negative and synaptophysin positive. Numerous neurosecretory granules were found and no typical synapsis was noticed on the electron microscope. No shunt operation was detected. Postoperative radiotherapy or chemotherapy was not performed and no tumor recurrence was detected during the one year follow-up period. We present the case together with a review of the literatures.