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이동통신 기지국 기반 도시철도 지하 역사 및 구간 위치 측위 기술 연구
유봉석(Bong Seok Yoo),김규호(Gyu Ho Kim),진주현(Ju Hyun Jin),장기백(Ki Baek Jang) 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.5
Urban railway can be divided into ground and underground sections. In particular, the center of the metropolitan has been built mostly underground stations and tunnels. Underground section is difficult to measure the position because GPS signal is unavailable, so it is necessary to apply the indoor positioning technology. For this purpose, we analyzed the positioning technologies which are based on Wi-Fi and mobile base stations. The positing technology for smart phone which uses mobile base station’ information is developed in the underground area of urban railway where the core technique is to implement base station ID into the positing technology by considering hand-off point. 도시철도는 지상과 지하 구간으로 분류할 수 있으며, 특히 수도권 중심부는 대부분이 지하 역사 및 터널로 구축되어 있다. 지하 구간은 지상과 달리 GPS 수신이 불가능하여 위치 측정이 힘들기 때문에 실내 측위 기술적용이 필요하다. 이를 위하여 본 연구에서는 Wi-Fi 기반과 이동통신 기지국 기반의 측위 기술에 대하여 분석하였다. 특히 도시철도 지하구간에는 핸드폰 통신을 위한 이동통신 기지국 정보를 활용한 기술을 연구하였으며, 핵심적인 기술로 터널 구간에서의 Hand-off 지점 간 변화되는 기지국 ID정보를 측위 기술에 적용하는 방안을 연구하였다.
소아 아급성 괴사성 림프절염의 조기 진단을 위한 비특이적 경부 림프절 종대와의 감별
정은진 ( Eun Jin Chung ),권영희 ( Young Hee Kwon ),장여순 ( Yeo Sun Jang ),백혜성 ( Hey Sung Baek ),장기석 ( Ki Seok Jang ),박찬금 ( Chan Kum Park ),박정선 ( Jeong Seon Park ),오재원 ( Jae Won Oh ),이하백 ( Ha Baik Lee ) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 2011 소아알레르기 및 호흡기학회지 Vol.21 No.4
Purpose: We conducted this research to make an earlier diagnosis and identify better treatment for Kikuchi-Fujimoto disease (KFD) by comparing clinical findings with nonspecifically enlarged cervical lymph nodes in children. Methods: Nineteen patients were diagnosed with KFD by tissue pathology from a fine needle aspiration biopsy and/or excisional biopsy and were compared with the clinical, radiological, and pathological findings of reactive hyperplasia. Results: The average onset age of onset for patients with KFD was 11.8 ± 3.61 years, and the male to female ratio was 1:1.1, whereas patients with reactive hyperplasia were 11.8 ± 5.96 years, and the male to female ratio was 1.7:1. Patients with KFD suffered more from fever than patients with reactive hyperplasia (68% vs. 13%, P=0.002). Patients with KFD showed perinodal infiltration (P=0.001) and necrosis on computed tomography, whereas patients with reactive hyperplasia did not show any of these findings. Ultrasonographic findings were similar between the two study groups. In contrast, the histopathological examinations of biopsied cervical lymph nodes were enormously helpful for distinguishing the findings of KFD from those of patients with reactive hyperplasia. Conclusion: We recommend a histopathological examination to distinguish KFD from reactive hyperplasia in children with significantly enlarged cervical lymph nodes. (Pediatr Allergy Respir Dis(Korea) 2011;21:326-333)