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한반도 성층권 에어로졸 관측을 위한 성층권 라이다 개발
신동호 ( Dong Ho Shin ),노영민 ( Young Min Noh ),이권호 ( Kwon H Lee ),장은숙 ( Eun Suk Jang ),신성균 ( Sung Kyun Shin ),김영준 ( Young J Kim ) 대한원격탐사학회 2013 大韓遠隔探査學會誌 Vol.29 No.5
본 연구는 성층권 에어로졸의 분포와 광학적 특성을 분석하기 위하여 새로이 개발된 광주과학기술원의 라이다 시스템에 대하여 설명하고자 한다. 성층권 에어로졸의 후방산란비 산출을 위해 Nd:YAG 레이저를 광원으로 1064 nm와 532 nm 두 파장의 탄성산란 채널을 개발하였고, 편광소멸도 분석을 위해 532 nm파장에 두 개의 편광 채널을 설치하였다. 광자계수방식과 아날로그 디지털 변환 두가지 방식을 동시에 채택하여 후방산란신호 수신 효율과 최대 관측 고도를 향상시켰다. 개발된 라이다 시스템을 이용하여 2011년 9월 22일에 한반도 상공 성층권 에어로졸관측 분석하여 예시하였다. 라이다 관측 자료 분석을 통해 532 nm파장에서 성층권 에어로졸의 후방산란비를 산출을 통해 에어로졸의 시공간적 분포를 확인하고, 체적편광소멸도와 입자편광소멸도 산출을 통해 하고 입자의 비구형성을 판단하였다. We developed the three channel lidar system to measure stratospheric aerosols at the Gwangju Institute for Science and Technology (GIST), a suburban site in Republic of Korea. The system provides backscatter coefficient (β) at 532 and 1064 nm as well as depolarization ratios (δ) at 532 nm (2β + 1δ) using the doubled Nd:YAG laser wavelength at 532 and 1064 nm. The lidar system is optimized to measure stratospheric aerosols such as volcanic ashes. This paper describes the details of the optical setup, data acquisition system, and analysis method. This study shows an example of measuring stratospheric aerosols emitted by the volcanic eruption which occurred in Mt. Nabro (13.37° N, 41.70° E).
오광택(Kwang Taek Oh),김연수(Yeon Soo Kim),김병철(Byung Cheol Kim),문두섭(Doo Seop Moon),이동석(Dong Suck Lee),이경상(Kyung Sang Lee),양석철(Suck Chul Yang),윤호주(Ho Joo Yoon),신동호(Dong Ho Shin),박성수(Sung Soo Park),이정희(Jung H 대한내과학회 1996 대한내과학회지 Vol.51 No.5
N/A Objectives: Pulmonary sequestration is a relatively rare congenital anomaly. It is a cystic mass of nonfunctioning lung tissue which lacks an obvious communication with the tracheobronchial tree and which receives all or most of its arterial blood supply from anomalous systemic vessels. It has a wide spectrum of various clinical manifestations. But high index of suspicion of sequestration with the aid of characteristic recurrent and longstanding symptoms, its location and invasive or non-invasive diagnostic tools is the key to early diagnosis and successful treatment. So we performed this clinical study to evaluate clinical symptoms and diagnostic methods of pulmonary sequestration. Methods: We reviewed eight cases of pulmonary sequestration seen during the period from 1982 to 1995 retrospectively to define the anatomical, clinical and radiologic features. Results: 1) The eight cases ranged in age from 11 to 35 years and show an even distribution within age decades. Sex ratio of male to female was a 1:1.67. 2) The presenting complaints were symptoms of local recurrent pulmonary infection. And also revealed unique chest pain or no any symptoms. 3) Plain X-ray findings were solitary nodules in three cases, pneumonic infiltration in two cases and cystic mass with air-fluid level, multiloculated cystic mass and solitary large cystic mass in each of the remaining three cases. 4) Preoperative diagnoses were possible in 5 cases and the other diagnoses were lung cancer in two cases and lung abscess in one case. 5) The seven cases were intralobar type and one case was extralobar type. Their location was in the lower lobe of the lung in seven cases and right upper lobe in one case. Among eight cases, the sequestrated lobe was located bilaterally in one case and the others were located unilaterally with a 2.5:1 Rt/Lt ratio. 6) Associated anomalies were esophageal cyst and bronchogenic cyst in two cases. 7) All cases were treated with lobectomy and extirpation without complication. Conclusion: We reviewed eight cases of pulmonary sequestration and its literature. These data reveal that pulmonary sequestration shows variable but characteristic clinical and radiological features. Therefore, a high index of suspicion about its characteristic clinical and radiologic features can provide us a change of early diagnosis and proper treatment of pulmonary sequestration.