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LPS에 의한 급성 폐손상에서 게르마늄에 의한 폐포-모세혈관 장벽의 변화
이윤정,조현국,신건호,전경희,Lee, Yoon-Jeong,Cho, Hyun-Gug,Sin, Gun-Ho,Jeune, Kyung-Hee 한국현미경학회 2009 Applied microscopy Vol.39 No.1
급성호흡곤란증후군은 다양한 원인에 의해 발생하는 급성 염증성 폐질환으로써 폐포-모세혈관 장벽의 파괴로부터 기인하며 파괴 기전에 호중구가 중요한 역할을 담당한다. 이에 대한 게르마늄의 항염증 효과 즉, 호중구의 폐조직 내 유주 억제로 인한 폐포-모세혈관의 손상의 감소로 폐손상이 경감되는지를 확인하고자 하였다. 실험군은 생리식염수를 투여한 대조군(CON), 내독소 5시간 투여군(LPS), 그리고 게르마늄 1시간 전처리 후 내독소 5시간 투여군(Ge+LPS)으로 나누었으며, 내독소는 $100{\mu}g$을 0.5 mL 생리식염수에 녹여 기도내로 분무하고, 게르마늄은 체중 100 g당 26 mg을 복강으로 투여하였다. 내독소의 주입으로 급성 폐손상을 유도시킨 내독소 투여군에서는 대조군과 비교하여 폐부종(p<0.001), 기관지폐세척액 내 단백질 함량(p<0.05), 호중구의 침윤(p<0.001)이 현저히 증가하였으나 게르마늄을 전처리 한 군은 내독소 투여군과 비교하여 모든 항목에서 유의하게 감소하였다. 현미경을 통한 관찰 결과에서도 게르마늄 전처리군은 내독소 투여군에 비해 내피세포, 제I형 폐포세포, 기저판으로 구성된 폐포-혈관장벽의 구조가 비교적 잘 보존되었고, 제II형 폐포세포의 Lamellar body와 미세융모 그리고 기저판의 구조도 비교적 정상적으로 보존된 상태로 나타났다. 그러므로 게르마늄은 항염증물질로 작용, 즉 호중구의 폐조직 내로의 유주현상을 방해하여 활성화된 호중구의 독성물질로 인한 폐포-모세혈관의 손상을 감소시킬 수 있었으므로 결과적으로 내독소로 유도된 폐손상은 게르마늄의 전처리에 의해 억제되었다고 판단된다. Acute respiratory distress syndrome (ARDS), also known as an acute inflammatory lung disease is developed by various factors that is originated from the destruction of alveolar-capillary barrier, and neutrophils plays an important role in the destruction. The study intended to confirm, the anti-inflammatory effect of germanium, whether a lung injury has been mitigated with the reduction of injury in alveolar-capillary barrier resulting from inhibition of neutrophils migration in lung tissue. Test groups were divided in saline administered CON, 5 hours of endotoxin administered LPS and 5 hours of endotoxin administered Ge+LPS following 1 hours of pre-processed germanium. $100{\mu}g$ endotoxin was melted in 0.5 mL saline and sprayed into airway and 26 mg germanium per 100 g weight was administered into abdominal cavity. The endotoxin group which induced an acute lung injury with administered endotoxin showed dramatic increase of pulmonary edema (p<0.001), protein contents in bronchoalveolar lavage fluid, BALF (p<0.05) and neutrophils of infiltration in BALF (p<0.001) comparing with a control group, while a pre-treated germanium group showed significant decrease in all categories comparing to the endotoxin administerd group. In the result of a microscopic observation, the structure of alveolar-capillary barrier which is constructed with basal lamina, alveolar type I cells and endothelial cell were preserved of the pre-treated germanium group relatively well compare to the endotoxin administered group. And the construction of lamellar body, microvilli and basal lamina of alveolar type II cells were also preserved relatively well. Hence, germanium activates as an anti-Inflammatory mediator in other words, it interfered neutrophils migration into lung tissue, thereby reduced injury of alveolar-capillary barrier from toxic substances of activated neutrophils. Consequently, the study has determined that the acute lung injury induced by endotoxin has been decreased by the pre-treated germanium.
이윤정,문상원,조희윤,정진혁,Yoon Jung Lee,M,D,Sang-Won Moon,M,D,Hee Yoon Cho,M,D,Jin-Hyeok Jeong,M,D 대한안과학회 2008 대한안과학회지 Vol.49 No.5
Purpose: Septal deviation has few subjective symptoms. However, a difficulty remains in doing DCR (dacryocystorhinostomy) in these patients. We investigate the clinical course of DCR in patients with a septal deviation. Methods: Acquired nasolacrimal duct-obstructed patients who had undergone DCR with septal deviation from 2003 to 2006 in our hospital were retrospectively analyzed. We measured the septal distance using paranasal computed tomography taken preoperatively and compared the sex and age of patients, the kinds of operations, outcome of surgery, and ocular and nasal complications in our analysis. Results: Twenty-two eyes of 22 patients with a mean age of 55.3 years (range 29~74) were analyzed (4 males, 18 females). Mean septal distance was 4.84 mm (range 2.18~6.99 mm). Nineteen eyes had endonasal DCR, and three had external DCR. Two had DCR combined with septoplasty. Three had septoplasty as a secondary operation, Nasal complication was synechiae in 9 eyes. DCR success was seen in 15 eyes, and DCR failure in 7 eyes. Septal distance was not correlated with DCR success but was correlated with nasal complication (Mann-Whitney test, p=0.003) Conclusions: In the case of DCR with septal deviation, the surgical technique used will need to minimize the mucosal injury and ensure appropriate nasal correction to prevent future complications.
이윤정(Lee Yoon Jeong),김정태(Kim Jeong Tai) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.3
There is no comprehensive consensus of the control patterns people operate shadings or the motivating factors that influence their decisions. Patterns of shading devices use can affect the energy consumption of buildings. Therefore, this study aims to analyze shading device usage patterns based on the physical factors that can affect occupants behavior. First, control patterns of indoor shading devices in apartment buildings were monitored by taking pictures. Next, frequency of shading device use together with their shading portions was analyzed based on two physical factors such as window orientation and floor level. The results showed that about 35% of the monitored apartment buildings utilized indoor shading devices. Also, the south-facing apartments were more dynamically used than their east-facing counterparts. On the contrary, there was no general trend in regards to the shading operation patterns.
오디오 e-Book 스트리밍을 지원하는 스테가노그래피 모델
이윤정(Lee, Yoon-Jeong),이봉규(Lee, Bong-Gyu),김철수(Kim, Chul-Soo) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.12
본 논문은 오디오 e-Book 스트리밍 콘텐츠에 저작권과 인증과 관련되는 비밀 데이터를 인코딩하고 추출할 수 있도록, 스트리밍 서비스 특성에 적합한 스테가노그래피 서비스 모델과 알고리즘을 제안한다. 은닉 데이터는 송신 측과 수신측에서 공유하는 비밀키 k를 사용하여 생성한 의사난수로 암호화하여 안전도를 높였다. 또한 은닉데이터가 커버데이터의 초반 일정구간 안에 랜덤하게 고루 분포하도록 하였고, 스트리밍의 상황을 고려하여 기타의 연산을 단 순화하여 처리율을 높였다. We present steganographic service model and algorism that fit feature of streaming audio book service in order to hide information of copyright and certificate of it. Secret information is encrypted with random numger by secret key that client and server share, so that increase confidentiality. We made secret data distributed randomly and evenly, and improved throughput by simplifying additional computations considering streaming environment.
이윤정(Lee, Yoon-Jeong),김철수(Kim, Chul-Soo),이봉규(Lee, Bong-Gyu) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.4
본 IPSec은 인터넷의 네트워크 계층에서 IP 메시지에 대하여, 암호화 서비스와 인증 서비스를 제공하는 보 안 프로토콜이다. 본 논문은 모바일 환경에서 요구되어지는 IPSec 에서의 키 복구를 위하여 IKEv2에 적용할 수 있 는 키 복구 수행 메커니즘을 제시한다. 이는 IPSec과 IKEv2에서 호환성을 유지할 수 있으며, 기존의 메커니즘보다 안전하며, 네트워크 오버헤드를 줄일 수 있으며, 키 위탁기관이나 권위기관에 종속되지 않고 키 복구 결정을 할 수 있는 메커니즘이다. IPSec is the security protocol that do encryption and authentication service to IP messages on network layer of the internet. This paper presents the key recovery mechanism that is applied to IKEv2 of IPSec for mobile communication environments. It results to have compatibility with IPSec and IKEv2, reduce network overhead, and perform key recovery without depending on key escrew agencies or authorized party.