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UAV와 음향측심기를 활용한 저수지의 3차원 지형정보 분석
송봉근,오주연,김성삼,이태욱,박경훈 한국방재학회 2018 한국방재학회논문집 Vol.18 No.7
The purpose of this study is to analyze the 3D geoinformation of a reservoir using a UAV and an echo sounder for effectively monitoring drought conditions in the reservoir. Water surface boundaries were analyzed using RGB imagery obtained by the UAV. Depth information was collected with the echo sounder, which was adapted for unmanned boats in this study. The obtained 3D geoinformation was analyzed using spatial interpolation methods. The maximum depth of the reservoir was determined as 3.2 m. The reservoir bed information differed according to the precision of unmanned boat operation; therefore, improvement in unmanned boat operation is required to accurately analyze the 3D geoinformation of a reservoir. 본 연구는 저수지의 가뭄현상의 효율적인 모니터링을 위해 UAV 및 음향측심기를 활용하여 저수지의 3차원 지형정보를 분석하였다. UAV 영상정보 취득을 통해 저수지 수면 경계 분석하였고, 무인보트에 탑재된 음향측심기에서 취득된 수심정보를 획득하였다. 그리고 공간내삽기법을 통해 3차원 지형정보를 분석하였다. 분석결과, 저수지의 수심은 최고 3.2 m로 나타났다. 저수지의 하상은 무인보트 운용의 정밀성에 따라 결과값의 차이가 있는 것으로 나타났다. 따라서 보다 정밀한 저수지의 3차원 지형정보를 분석하기 위해서는 무인보트의 자동항법기능 추가 등 운용방법에서 개선이 필요할 것으로 보인다.
송봉근,이종덕,박용현,송운용,김중길,Song Bong-Keun,Lee Jong-Duk,Pak Yong-Hyun,Song Un-Yong,Kim Jung-Gyl 대한침구의학회 1998 대한침구의학회지 Vol.15 No.2
Infrared thermographic imaging visualizes noninvasively various abnormal condition by detecting the skin temperature. As the imaging represents the objective condition by the changes in blood flow under the control of autonomic nervous system, it is used to diagnosis and monitor the lumboscral radiculopathy. And asymmetry is important in the diagnosis of disc herniation. The most common type of disc herniation occurs psoterolaterally. This frequently causes nerve root compression leading to a radiculopathy in the distribution of the involved nerve root, most of which also provoke the asymmetric changes in thermography. Central disc herniation, which accounts for 5% to 35% of disc herniation, is typically associated with low back pain. But radiculopathy is usually abscent unless central disc heriniaton is large enough to cause compression of the cauda equina. To evalute the diagnostic value of the thermographic imaging in the diagnosis of central disc herniation, the imaging of 15 normal subjects and 48 patients with central disc herniation documented by CT scan were analyzed. The patients had either bilateral radiculophathy or no radiculopathy. The imaging of patient group with non rediculopathy did not show any significant thermal difference to control. While bilateral radiculopathy group reveled hypothermic pattern compared twith control. Thermal difference between left and right side did not present any significance in non radiculopathy group but hypothermia in bilateral radiculopathy group. Large herniation group demonstrated hyperthemic pattern while the others showed no significant change. Cranial caudal thermal difference did not show any difference between experiment groups. These results shows that infrared thermographic imaging can be used central disc herniation with bilateral radiculopathy, while it seems to little useful on the diagnosis of non radiculopathic disc herniation.
GIS 기법을 활용한 화학사고 대피시설의 적정성 분석 - 울산광역시를 대상으로 -
송봉근,이태욱,김현주,김태훈 한국지리정보학회 2018 한국지리정보학회지 Vol.21 No.1
The purpose of this study is to minimize damage of chemical accidents through the appropriation analysis of evacuation facility position focused on Ulsan metropolitan city. For analysis, informations such as pollutant release and transfer registers(PRTR), population census, and evacuation facilities were used. After then, damage assessment of chemical accidents, accessibility and appropriation of evacuation facilities were analyzed. Damage of chemical accidents is high in around 5km of industrial complex there is dense of chemical facility and population. Evacuation facilities were mainly situated in hazard area of chemical accidents, but accessibility of evacuation facilities was vulnerable in chemical plant neighborhood. Therefore, safety check of deteriorated plants is important for prevention of chemical accidents. Also, effective evacuation plan considering capacity and scale of evacuation facilities will be established. 본 연구는 울산광역시를 대상으로 화학사고에 대비한 대피시설 위치의 적정성을 분석하여 피해 최소화를 위한 방안을 연구하였다. 연구방법은 화학물질 배출 및 이용량 자료와 인구센서스 집계구 자료, 대피시설 위치정보 등을 활용하여 화학사고 위험성 평가와 대피시설의 접근성을 분석하였다. 이를 통해 대피시설 위치의 적정성을 도출하였다. 화학사고 위험성은 석유화학공장과 인구가 밀집된 석유화학공단지역 인근 5km 이내에서 높았다. 대피시설은 대부분 화학사고 위험지역에 분포하고 있으나, 석유화학공장 인근지역에서 대피시설의 접근성이 취약한 것으로 나타났다. 따라서 우선적으로 화학사고 예방을 위해 노후화된 공장시설의 안전점검도 필요하지만, 대피시설의 수용 인원, 규모 등을 고려하여 보다 효과적인 대피방안을 마련해야 될 것이다.
당귀 추출물 정맥 주사가 Middle Cerebral Artery Occlusion 모델 흰쥐에서 Gliosis 억제에 미치는 영향
송봉근,전용철,김선애,심안나,성기문,이언정,Song, Bong-Keun,Jeon, Yong-Cheol,Kim, Sun-Ae,Shim, An-Na,Seong, Kee-Moon,Lee, Eon-Jeon 대한약침학회 2011 Journal of pharmacopuncture Vol.14 No.3
Objectives : Gliosis becomes physical and mechanical barrier to axonal regeneration. Reactive gliosis induced by middle cerebral artery occlusion is involved with up-regulation of CD81 and GFAP (Glial fibrillary acidic protein). The current study is to examine the effect of the Angelica gigas Nakai(intravenous injection. 100 mg/kg twice in a day) on CD81 and GFAP of the rat in the brain after middle cerebral artery occlusion. Methods : Cerebral infarction was induced by middle cerebral artery occlusion. And after intravenous injection of water extract of Angelica gigas Nakai, the size of cerebral infarction was measured. Examination of optical microscope were also used to detect the expression of CD81 and GFAP in the brain of the rat. Results : The following results were obtained : We found that size of cerebral infarcion induced by MCAO (Middle Cerebral Artery Occlusion) in rats were decreased after intravenous injection of Angelica gigas Nakai. We injected the extract of Angelica gigas Nakai to the MCAO in rats, and the optical microscope study showed that Angelica gigas Nakai had effect on protecting the cells of hippocampus. We found that GFAP, CD81 and ERK of the brain in rats with cerebral infarction after MCAO were meaningfully decreased after intravenous injecting Angelica gigas Nakai. We found that c-Fos expression of the brain in rats with cerebral infarction after MCAO were significantly increased after intravenous injecting Angelica gigas Nakai. Conclusions : These results indicate that Angelica gigas Nakai could suppress the reactive gliosis, which disturbs the astrocyte regeneration in the brain of the rat with cerebral infarction after MCAO by controlling the expression of CD81 and GFAP. And the effect may be modulated by the up-regulation of c-Fos and ERK.