http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
와이어 직조 카고메 다공질 금속을 중간재로 갖는 샌드위치 판재의 최적 설계
이용현(Yong-Hyun Lee),강기주(Ki-Ju Kang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In this paper, first, the geometry and the effect of the geometry such as the curved shape of the struts, which compose the truss structure of WBK, are elaborated. Then, analytic solutions for the material properties of WBK and the maximum loads of a WBK-cored sandwich panel under bending are derived. A design optimization with the face sheet thickness and the core height selected as the design variables is presented for given slenderness ratios of the WBK core. Unless the face sheet thickness is limited, the optimal design to give the maximum load per weight is always found at a confluence of three failure modes, namely, face sheet yielding, indentation plastic, and core shear modeB plastic.
여정실(女貞實)이 LPS로 유발된 RAW 264.7 cell의 염증에 미치는 영향
이용현 ( Yong Hyun Lee ),임은미 ( Eun Mee Lim ) 대한한방부인과학회 2013 大韓韓方婦人科學會誌 Vol.26 No.4
This study was carried out to investigate the anti-inflammatory effects of Ligustri Lucidi Fructus water extract (LF) in the lipopolysaccharide (LPS)-induced mouse macrophages RAW 264.7 cell. Methods: Ligustri Lucidi Fructus was extracted with distilled water (2,000 ml) for 2 hours. In order to evaluate cytotoxicity of LF, 3-(4,5-dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide (MTT) assay was performed. To investigate anti-inflammatory effects of LF, the concentration of nitric oxide (NO) was measured with NO assay, cytokine was measured by Bio-Plex cytokine assay, and intracellular calcium (Ca) was measured with Fluo-4 Ca assay in RAW 264.7 cell. And when p-value is below 0.05, it is judged to have the significant difference statistically (P<0.05). Results:1. LF showed no cytotoxicity. 2. LF inhibited significantly the production of NO at the concentration of 25, 50 and 100 μg/ml. 3. LF inhibited significantly the production of interleukin (IL)-4, macrophage inflammatory protein (MIP)-1α, granulocyte colony stimulating factor (G-CSF) at the concentration of 25, 50, 100 and 200 μg/ml. 4. LF inhibited significantly the production of granulocyte macrophage-colony stimulating factor (GM-CSF), vascular endothelial growth factor (VEGF) at the concentration of 50, 100 and 200 μg/ml, the interferon (IFN)-γ at 25, 50 and 100 μg/ml respectively. 5. LF inhibited significantly the production of IL-1β at the concentration of 50 and 200 μg/ml, the IL-5 at 25 and 100 μg/ml, the IL-12p70, MIP-1β at 50 and 100 μg/ml, the regulated on activation, normal T cell expressed and secrete d (RANTES) at 100 and 200 μg/ml respectively. 6. LF inhibited significantly the production of IL-10, interferon gamma-induced protein (IP)-10 at the concentration of 200 μg/ml. 7. LF inhibited significantly the production of intracellular Ca at the concentration of 25, 50, 100 and 200 μg/ml.
이용현 ( Yong-hyun Lee ),이승용 ( Seong-yong Lee ),김동국 ( Dong-kook Kim ),노봉남 ( Bong-nam Noh ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.1
컴퓨터의 생활 전반에 걸친 영향으로, 컴퓨터는 우리 생활 속에서 빼놓을 수 없는 하나의 정보 매체로 자리 매김 되었다. 하지만 그 이면에는 컴퓨터를 이용한 전산망 침해 행위, 전자기록 위·변조, 각종 음란물 유통, 바이러스 제작 유포 등 많은 위험들이 우리를 위협하고 있다. 그래서 컴퓨터를 사용한 범죄 행위를 탐지하는 방법에 대한 관심이 높아지고 있다. 또한 각종 범죄 행위는 인터넷을 통한 범죄가 늘고 있어, 네트워크 정보를 통한 포렌식에 관한 연구가 활발하다. 하지만, 매일 많은 양의 패킷을 분석하는 것은 많은 전문 인력과 비용이 소요된다. 본 논문에서는 의사결정나무를 이용한 패킷분석을 통하여 네트워크 포렌식의 정보를 추출하는 방법을 제안한다.
췌장의 신경내분비종양의 임상양상 및 WHO 분류에 따른 예후
이용현(Yong Hyun Lee),손준호(Jun Ho Sohn),윤혁진(Hyuk Jin Yun),권형준(Hyung Jun kwon),천재민(Jae Min Chun),김상미(Sang Mi Kim),김상걸(Sang Geol Kim),황윤진(Yoon Jin Hwang),윤영국(Young Gook Yun) 한국간담췌외과학회 2010 한국간담췌외과학회지 Vol.14 No.3
Purpose: Clinical features of Pancreatic Neuroendocrine Tumors (PETs) vary according to the hormone secreted and to the heredity of the tumors. Malignant PETs are common among nonfunctioning PETs (NFTs) whereas the majority of functioning PETs (FTs) are benign. Our goal was to determine the clinical features and prognosis of PETs stratified by the WHO classification scheme and AJCC-UICC 7TH TNM staging. Methods: We selected for study 30 patients with PETs, including one case of nesidiolastosis, who presented at our clinic between April 1992 and June 2010. Clinicopathological features were studied retrospectively. PETs were classified as benign, uncertain malignant, well differentiated carcinoma, or poorly differentiated carcinomas by the WHO classification. For statistical analysis, Student"s t-test, the Chi-square test, and the Kaplan-Meier method were utilized. Results: Nine cases were FTs and twenty one cases were NFTs. The average size of the FTs was smaller than that of the NFTs (1.71 vs 4.33, p=0.04). The head of the pancreas was most commonly involved (33.3% of FTs; 47.6% of NFTs) but the locations of the tumors were not different. Insulinoma was the most common (66.7%, 6/9) among FTs. The incidence of malignant tumors was 33.3% and 55.0% among, respectively, FTs and NFTs. The 5-year disease-free survival rate of patients with benign PETs (FTs and NFTs), and of patients with functioning well-differentiated carcinomas was 100%. However, the 5-year disease-free survival rates of patients with nonfunctioning well- and poorly-differentiated carcinomas were 66.7% and 0%. Conclusion: Among patients with Pancreatic Neuroendocrine Tumors, malignant tumors are more common among NFTs than FTs. Poorly-differentiated carcinomas have a worse prognosis while all FTs regardless of their WHO classification fail to show any disease recurrence.