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이차성 부갑상선 기능항진증과 연관되어 발생한 상완골의 갈색종 1예
서지원,고태경,홍종철,박헌수,Ji Won Seo,Tae Kyung Koh,Jong Chul Hong,Heon Soo Park 대한갑상선-내분비외과학회 2013 The Koreran journal of Endocrine Surgery Vol.13 No.2
Brown tumor is a bone disease that arises in the setting of increased osteoclastic activity and fibroblastic proliferation in the involved bone. It is well recognized as serious complication of hyperparathyroidism. Brown tumor is uncommon, and brown tumor with secondary hyperparathyroidism resulting from chronic renal failure has rarely been reported. We recently experienced a case of a 28-year-old Korean woman with chronic renal failure caused by chronic glomerulonephritis, on hemodialysis for nine years. She has been hospitalized with left shoulder pain for two years. Image studies showed multiple cystic masses, and both suspicious marked thinning and partial destruction of the cortex on the head of the left humerus. Histopathologic analysis of the mass lesion showed a fibrotic capsule, hemosiderin pigmentation, and giant cell, all characteristic of brown tumor. A subtotal parathyroidectomy was done without surgery of the bony lesion (brown tumor), with successful results. We report this case with a brief review of the literature.
4세 이상의 부분조절내사시에서 수술방법에 따른 결과 비교
서지원,이주연,백혜정,Ji Won Seo,Joo Yeon Lee,Hae Jung Paik 대한안과학회 2013 대한안과학회지 Vol.54 No.7
Purpose: To compare postoperative outcomes according to surgical method in partially accommodative esotropia in patients over 4 years of age. Methods: We compared motor and sensory outcomes between conventional and augmented surgery in 66 patients. The postoperative follow-up period was at least 24 months. The formula for the amount of the rectus muscle recession was based on the distant angle deviation after hyperopic correction in the conventional group and the average amounts of the distant angle deviation with and without full correction of hyperopia in the augmented group. In addition, the conventional group was divided into 2 sub-groups to compare surgical outcomes. The A group consisted of patients who underwent surgery with the amount of surgical correction based on distant angle deviation after full hyperopic correction. The B group consisted of patients under the same condition after reduced hyperopic correction to achieve best corrected visual acuity (BCVA). Results: Among the patients who had an ocular alignment less than 10 PD, orthophoria was significantly higher in the conventional group than in the augmented group on the last follow-up. When comparing the 2 conventional sub-groups, the postoperative stereoacuity was better in group B than in group A. Among patients with a postoperative overcorrected alignment of more than 10 PD who underwent augmented surgery, 75% showed decreased postoperative stereoacuity compared to preoperative stereoacuity. Conclusions: In partially accommodative esotropia in patients over 4 years of age, conventional surgery compared to augmented surgery after reduced hyperopic correction is better in order to achieve BCVA for postoperative stereoacuity as well as ocular alignment.
디스플레이형 자판기 사용자 분석을 위한 이중 단계 검출 및 분류 망
서지원,김미경,Seo, Ji-Won,Kim, Mi-Kyung 한국정보통신학회 2022 한국정보통신학회논문지 Vol.26 No.5
Machine learning techniques using visual data have high usability in fields of industry and service such as scene recognition, fault detection, security and user analysis. Among these, user analysis through the videos from CCTV is one of the practical way of using vision data. Also, many studies about lightweight artificial neural network have been published to increase high usability for mobile and embedded environment so far. In this study, we propose the network combining the object detection and classification for mobile graphic processing unit. This network detects pedestrian and face, classifies age and gender from detected face. Proposed network is constructed based on MobileNet, YOLOv2 and skip connection. Both detection and classification models are trained individually and combined as 2-stage structure. Also, attention mechanism is used to improve detection and classification ability. Nvidia Jetson Nano is used to run and evaluate the proposed system.
서지원 ( Ji Won Seo ),정진욱 ( Jin Ook Jeong ) 연세대학교 경제연구소 2014 延世經濟硏究 Vol.21 No.1
아시아 외환위기 이후 한국의 빈부 격차가 심해지면서, 최저임금제도의 효과와 관련한 연구가 많이 이루어졌다. 대부분의 연구는 최저임금제의 부정적 효과인 실업의 발생에 집중되었다. 이 연구는 최저임금제가 빈곤층을 줄이는 효과가 있는지를 분석한다. 2003-2008 기간의 한국노동연구원 패널자료(KLIPS)를 임의효과 패널 프로빗 모형으로 추정한 결과, 한국의 최저임금제는 빈곤층이 될 확률을 낮추는 효과가 있었던 것으로 실증되었다. The effects of the minimum wage policy have been controversial in Korea with an increasing gap between the rich and the poor since the Asian financial crisis. Most studies in Korea have focused on the disemployment effects of higher minimum wages and the negative effects of the policy in Korea. This study looks at the possible effects of the minimum wage policy on reducing poverty rates, as measured by the number of people who fall under the defined poverty threshold. We utilize a binary probit model to analyze the Korean Labor and Income Panel Study data and find that a higher hourly minimum wage can reduce the probability of an individual falling under the poverty line.