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Yu-Hyeon Won(원유현),Jin-Sung Kim(김진성),Byuong-Chan Park(박병찬),Young-Mo Kim(김영모),Seok-Yoon Kim(김석윤) 한국컴퓨터정보학회 2019 韓國컴퓨터情報學會論文誌 Vol.24 No.1
In this paper, we propose a efficient feature point extraction method that can solve the problem of performance degradation by introducing a preprocessing process when extracting feature points by utilizing the characteristics of 360-degree realistic media. 360-degree realistic media is composed of images produced by two or more cameras and this image combining process is accomplished by extracting feature points at the edges of each image and combining them into one image if they cover the same area. In this production process, however, the stitching process where images are combined into one piece can lead to the distortion of non-seamlessness. Since the realistic media of 4K-class image has higher resolution than that of a general image, the feature point extraction and matching process takes much more time than general media cases.
블록체인을 활용한 특별관리임산물 품질관리 시스템의 설계
유성현 ( Sunghyun Yu ),이재호 ( Jaeho Lee ),정지원 ( Jiwon Jeong ),원유재 ( Yoojae Won ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
특별관리임산물의 관리ㆍ감독을 위하여 법률을 바탕으로 품질관리제도를 마련하고 있으며, 현재 문서를 통해 관리하고 제도적인 신뢰에 의존하는 방식에 머물러 있다. 이는 많은 비용을 발생시키며, 제도를 악용하는 사기 사례가 발생하고 있다. 본 연구에서는 문제점을 해결하기 위해 블록체인을 이용한 특별관리임산물 품질관리 시스템을 제안한다. 해당 시스템은 품질 관리를 위한 문서를 법률에 따른 양식에 따라 전자문서로 생성하고, 문서 정보를 분산장부에 저장하여 누구나 확인 할 수 있도록 한다. 전자 문서들은 기관의 데이터베이스에 보관하여 확인 할 수 있도록 하며, 분산장부의 문서 정보 등록 이력을 통해 품질관리 이력을 추적하고 검증할 수 있도록 한다.
배동현,김재민,원유덕,최규선,정진환,이형중,김충현 대한뇌혈관외과학회 2014 Journal of Cerebrovascular and Endovascular Neuros Vol.16 No.3
Objective : Because of the complex anatomical association among vascular,dural, and bony structures, paraclinoid internal carotid artery (ICA)aneurysms remain a major challenge for vascular neurosurgeons. Westudied the clinical outcomes of 61 paraclinoid ICA aneurysms after microsurgicalclipping in comparison with endovascular coiling. Materials and Methods : Between January 2008 and December 2012, wetreated 61 paraclinoid ICA aneurysms created by surgical clipping or endovascularcoiling. Preoperative neurologic status and postoperative outcomewere evaluated using the Glasgow coma scale (GCS) and themodified Rankin scale (mRS). Postoperative hydrocephalus and vasospasmwere reviewed using the patients' medical charts. Results : Most patients were in good clinical condition before the operationsand had good treatment outcomes. Clinical vasospasm was observedafter the operation in five patients, and hydrocephalus occurred insix patients. No statistically significant difference regarding aneurysm size,sex, GCS score, H-H grade, and mRS was observed between the surgicalclipping group and the endovascular coiling group. In addition, the treatmentresults and complications did not show statistically significant differencein either group. Conclusion : Surgical occlusion of paraclinoid ICA aneurysms is difficult;however, no significant differences were observed in the treatment resultsor complications when compared with coil embolization. In particular, useof an adequate surgical technique may lead to better outcomes thanthose for coil embolization in the treatment of large and/or wide-neckparaclinoid ICA aneurysms.