http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Double-Independent-Gate Ambipolar Silicon-Nanowire Field Effect Transistors
홍성현(Seong Hyeon Hong),유윤섭(Yun Seop Yu) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
In this paper, a newly proposed Double-Independent-Gate(DIG) Ambipolar Silicon -Nanowire(SiNW) Field Effect Transistor (DIG Ambi-SiNWFET) is introduced. The proposed transistor has two types of gate such as Polarity Gate(Pgate) and Control Gate(Cgate). We demonstrated a correlation between current level and work function of Pgate, Cgate, and Source/Drain(S/D) of the DIG Ambi-SiNWFET. As a result, the current level of DIG Ambi-SiNWFET has small dependence on the work function of Cgate, but it has much dependence on those of Pgate and S/D. When the work functions of Pgate and Cgate and S/D are 4.75eV and 4.5 eV and 4.8eV, respectively, the DIG Ambi-SiNWFET shows clear ambipolar |Ids|-Vds characteristics when Pgate voltage = 1V and Cgate voltage = 1V, and Pgate voltage = -1V and Cgate volatge = -1V.
Oral Sulfate Tablet을 이용한 대장정결 후 발생한 저나트륨혈증에 의한 뇌전증 1예
홍성현 ( Sung Hyun Hong ),이동석 ( Dong Seok Lee ),김지원 ( Ji Won Kim ),이국래 ( Kook Lae Lee ),강현우 ( Hyoun Woo Kang ),김수환 ( Su Hwan Kim ) 대한소화기학회 2022 대한소화기학회지 Vol.80 No.3
The oral sulfate tablet (OST), commercially available as Orafang<sup>®</sup> (Pharmbio Korea Co., Seoul, Korea) in Korea, is being used increasingly because of its bowel-cleansing efficacy, safety, and tolerability in adults undergoing colonoscopy. Other bowel cleansing agents, such as polyethylene glycol and sodium picosulfate/magnesium citrate, can cause plasma volume depletion and electrolyte disturbances, such as hyponatremia. On the other hand, the OST has never been reported to cause hyponatremia in Korea. To our knowledge, the authors experienced the first case of hyponatremic seizure in an 81-year-old woman to whom an OST was administered for bowel preparation before a colonoscopy. After ingesting the OST, she presented with seizure, confusion, and dyspnea. Upon arrival, her serum sodium level was 120 mEq/L, and the urine osmolality and sodium levels were 449 mOsm/kg and 253 mOsm/kg, respectively; chest imaging suggested pulmonary edema. The associated symptoms disappeared following treatment with an intravenous injection of normal saline and 3% NaCl to normalize the sodium level. This case shows that the OST can cause hyponatremia and other severe complications related to hyponatremia. (Korean J Gastroenterol 2022;80:154-157)
강수지표를 이용한 우리나라 강수량의 시간적인 특성 변화
홍성현,김영규,이원현,정은성,Hong, Seong-Hyun,Kim, Young-Gyu,Lee, Won-Hyun,Chung, Eun-Sung 한국수자원학회 2012 한국수자원학회논문집 Vol.45 No.4
본 연구에서는 과거에서부터 기록된 우리나라 65개의 관측소들을 대상으로 강수량 데이터를사용하여 강수빈도와 극한 지표들을 산출해 냄으로써, 지표에 따라 지역별 분포를 살펴보고 시공간적인 증 감율에 대한 결과를 제시하였다. 그 결과를 시계열로 도시함으로 쉽게 파악할 수 있지만경향이 뚜렷하게 나타나지 않는 경우에는 통계적 방법인 Mann-Kendall 경향성 분석을 실시하여 이에 대해 파악하였다. 더불어 FARD를 이용하여 100년과 200년의 빈도확률강수량을 산정하고 이를 비교하였다. 강우특성을 크게 Amount, Extreme, Frequency로 분류하고 각각의 지수를 강우량 지수(Rainfall Index for Amount), 강우극치 지수(Rainfall Index for Extremes), 강우빈도 지수(Rainfall Index for Frequency)로 정의하고 RIA, RIE, RIF를 산술평균하여 홍수에 대한 종합적인 강우 위험도를 나타내는 평균 강우지수(Average Rainfall Index, ARI)를 산정하였다. 그 결과 과거에 비해 최근 10년간 강우량의 정량적인 평가 특성은 양적으로 22.3%, 극치사상 발생측면은 26.2%, 빈도측면은 5.1% 증가하였음을 확인 할 수 있었다. 본연구의 결과는 최근 우리나라 기후변화 경향을 구체적으로 제시하고 있으므로 기후변화 대비 적응 연구의 기초 자료로 활용될 수 있다. This study suggests the results of temporal and spatial variations for rainfall data in the Korean Peninsula. We got the index of the rainfall amount, frequency and extreme indices from 65 weather stations. The results could be easily understood by drawing the graph, and the Mann-Kendall trend analysis was also used to determine the tendency (up & downward/no trend) of rainfall and temperature where the trend could not be clear. Moreover, by using the FARD, frequency probability rainfalls could be calculated for 100 and 200 years and then compared each other value through the moment method, maximum likelihood method and probability weighted moments. The Average Rainfall Index (ARI) which is meant comprehensive rainfalls risk for the flood could be obtained from calculating an arithmetic mean of the RI for Amount (RIA), RI for Extreme (RIE), and RI for Frequency (RIF) and as well as the characteristics of rainfalls have been mainly classified into Amount, Extremes, and Frequency. As a result, these each Average Rainfall Indices could be increased respectively into 22.3%, 26.2%, and 5.1% for a recent decade. Since this study showed the recent climate change trend in detail, it will be useful data for the research of climate change adaptation.
조혈전구세포의 시험관 증식 및 분화에 대한 HoxB4와 STAT3의 상호조절 연구
홍성현 ( Sung Hyun Hong ),양승집 ( Seung Jip Yang ),김진아 ( Jin A Kim ),오일환 ( Il Hoan Oh ) 한국조직공학·재생의학회 2007 조직공학과 재생의학 Vol.4 No.2
Self-renewal of hematopoietic stem cells(HSC) is a major mechanism for regeneration of blood tissues from HSCs. Previous studies have identified HoxB4 and STAT3 as an important molecular mechanisms regulating HSC self-renewal, but potential interaction of the two remains unknown. To address the issue, transgenic mice for constitutively activated STAT3(STAT3-C) was examined for HoxB4 expression, but no difference in the HoxB4 expression level was seen compared to the control mice. On the contrary, when HoxB4 was co-transduced with dominant negative(dnSTAT3), the enhancing effect of HoxB4 on the proliferation of 5-FU stimulated bone marrow cells were significantly decreased as compared to the HoxB4 alone group. Similarly, the effect of HoxB4 on the maintenance of undifferentiated state as determined by lineage marker was significantly deteriorated by co-expression of dnSTAT3. Taken together, these results suggest that STAT3 activity could be a down-stream of HoxB4, being required for HoxB4-mediated enhancing effects on in vitro cultured hematopoietic precursor cells.