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Fabrication of InSb TFT and Parameters EXtraction Using Optimization Technique
김홍배,손상희,곽계달,Kim, Hong Bae,Son, Sang Hee,Kwack, Kae Dal The Institute of Electronics and Information Engin 1987 전자공학회논문지 Vol.24 No.1
InSb TFT is fabricated by the vacuum evaporation method and I-V characteristics are measured. Employing Davidon Fletcher-Powell algorithm, the device parameters are extracted. The current-voltage relations calculated by extracdted parameters are in good agreement with experimental results. It is found that optimization technique may be more simple and accurate than curve fitting method in device parameters extration.
김홍배,강경화,황원덕,유선애,이승연,Kim, Hong-Bae,Kang, Kyung-Hwa,Hwang, Won-Deuk,Lyu, Sun-Ae,Lee, Seung-Yeon 대한한방소아과학회 2009 대한한방소아과학회지 Vol.23 No.3
Objectives To evaluate that Okwada affected which factors for treatment of lung fibrosis. Methods Bleomycin induced lung fibrosis model made in mice. After Okwada lyophilized, power sample obtained and melt in distilled water. Okwada solution administered mice through oral route on 21 days after bleomycin instillation and this procedure performed once a day for 7 days. We divided by three groups; normal (control), bleomycin induced lung fibrosis without treatment (experimental), bleomycin induced lung fibrosis with treatment (treatment). On six weeks after bleomycin instillation, mice sacrificed and removed lung. We performed Western blot analysis for TGF-beta, phosphodiesterase 5A, interleukin (4,5,13) and compared therapeutic effects of Okwada. Results On western blot analysis, all normal and experimental mice detected TGF-beta, phosphodiesterase 5A, interleukin 4,5,13. The amount of band of TGF-beta, phosphodiesterase 5A, interleukin 5 in experimental and treatment group was similar. However, interleukin 4,13 of treatment group decreased compared with experimental group. Conclusions Okwada would be effected the lung fibrosis through suppression of interleukin 4,13.
升麻葛根湯의 항히스타민 효과 및 IL-4와 GM-CSF 발현에 미치는 영향
김홍배,김원일,이승연,Kim, Hong-Bae,Kim, Own-Il,Lee, Seung-Yeon 대한한방소아과학회 2006 대한한방소아과학회지 Vol.20 No.1
We investigated the effect of Sungmagalkun-tang (SGT) on the allergy. We conformed compound 48/80-induced active systemic anaphylatic shock, anti-dinitrophenyl IgE-mediated passive cutaneous anaphylaxis and ovalbumin-induced anaphylatic shock. Also observed IL-4 and GM-CSF mRNA expression in ovalbumin-induced allergic lung tissue and RBL-2H3. Histamine release is measured in RBL-2H3. SGT inhibited active systemic anaphylatic shock, passive cutaneous anaphylaxis and ovalbumin-induced anaphylatic shock by oral administration. We observed that SGT was concentration-dependently reduced IL-4 and GM-CSF mRNA expression in ovalbumin-induced allergic lung tissue and RBL-2H3 by SGT. In addition, SGT reduced histamine release in RBL-2H3. These results indicate that SGT has anti-histamic effect and controls IL-4 and GM-CSF mRNA expression on allergy.
로버트 벤츄리의 건축에 표현된 양자공존적(兩者共存的) 대입(對立)에 관한 연구 - Mother's House을 중심으로 -
김홍배,이남규,Kim, Hong-Bae,Lee, Nam-Gyu 한국주거학회 2011 한국주거학회 논문집 Vol.22 No.4
This study was conducted to investigate the ambivalent characteristics of dichotomous contradictions expressed by Robert Venturi's architecture. It focused on his Mother's House, which applied his theoretical practices faithfully among many of his architectural works. First, he sought to change interior and exterior spaces by manipulating the architectural scales of "Mother's House". He achieved tension in space through structural complexities in combination with contradictions. Second, as for the characteristics of ambivalent contradictions, including linear and geometric forms, and plane, there were familarity which emphasizes tradition; external appearances of symmetry and asymmetry which give a comfort feeling; openness and closedness, which were expressed with the size of windows and objects such as molding. Third, the fireplace-chimney and the stair were forming appropriate harmony between contradiction and complexity as they competed for central position on the plane.
Toward Alternative Programs for Financial Stability : Digital Currency and Financial Network Model
Hong-Bae Kim(김홍배),Heejung Youn(윤희정),Berdiyor Orzikulov(오지쿠로브 베르디요르) 한국산업경제학회 2019 산업경제연구 Vol.32 No.4
금융위기는 실물경제에 대한 중대한 영향을 끼치므로 금융안정성을 유지하는 것이 국가경제의 훼손을 막고 경제성장을 지속적으로 추진할 수 있는 방법이다. 따라서 금융위기에 대한 원인을 선제적으로 파악하여 효율적인 정책이 마련되어야 한다. 최근까지 중앙은행과 규제기관의 금융안정성을 위한 건전성 정책은 거시건전성 및 미시건전성 정책을 통해 진행되어 왔지만 여전히 금융시장은 불안하고 안정화를 달성하기에는 부족하다. 본 연구는 최근의 신기술인 빅데이터와 가상통화를 이용하여 금융안정성을 달성하기 위한 두 가지 시험적인 대안을 제시하는 것을 목적으로 하였다. 첫째, 빅데이터를 통해 복합적인 금융기관과 금융시장망의 상호연계성에 의한 금융위기 전염을 분석하는 금융네트워크 모형(Financial Network Model)이다. 둘째, 4차 산업혁명의 블록체인 기반경제에서의 지불수단이 될 디지털 화폐를 이용한 금융안정성 정책 추진이다. 본 연구를 통해 전통적인 건전성 정책의 한계를 극복하여 금융네트워크 모형과 디지털 화폐를 통한 화폐의 본질적 기능으로 금융시장 안정화를 달성하는 대안으로 논의될 있기를 기대한다. As financial crises have serious impacts on real economy, it is believed to keep financial stability is critical to preventing damage and bring growth to the economy. Though central banks and regulation authorities have endeavored to eliminate the instability through the traditional macro and microprudential policies, financial markets have not reached stability as desired. We conduct a documentary research in order to offer some alternatives to the failing traditional policies in pursuit of financial stability. This paper especially tries to suggest alternative programs for obtaining financial stability along with the adoption of the network model as macroprudential and digital currency by central bankers as a lender of last resort. An interdependent network formed with financial institution network and financial market network gives a more accurate picture of a financial system. A multiplex network model informs that the financial stability depends on the interplay of the contagion processes. Digital currencies rooted in distributed ledger technology(blockchain) seem to be safer than central bank payment systems. Thus, this study notes that the introduced programs, such as network linkages to predict bank defaults and the adoption of digital currency, should be considered very effective. We expect our alternative approaches to financial stability will be seriously taken into consideration by authorities who are interested in boosting economic growth.
김홍배 ( Hong Bae Kim ),엄승섭 ( Sung Sub Eum ),장지경 ( Ji Kyung Jang ) 한국금융공학회 2012 금융공학연구 Vol.11 No.3
본 연구는 신용부도스왑(CDS)스프레드의 결정요인 대한 기존연구를 확장시킨 연구로서 CDS 스프레드와 주식 및 외환 옵션시장의 변동성간 의 유의미성을 검토하였다. 본 연구는 CDS 스프레드와 옵션시장 간 정보전달 내용에 촛점을 맞추어2006년 1월부터 2012년 3월 까지 1,570개의 일별자료를 대상으로 하였다. 분석결과 첫째, 차분을 하면 정보유실이 많은 기존 연구결과에 따라서 수준변수에 대한 회귀분석한 결과, 외환 옵션시장이 주식옵션 시장보다 CDS스프레드의 결정에 더 높은 설명력을 보였다. 이는 한국 소버린 CDS 가 주식시장보다 한국의 신용위험에 따른 외환시장에서의 펀딩에 더욱 민감하게 작용함을 의미하는 것으로 해석할 수 있다. 둘째, 역사적 변동성보다는 내재변동성 더 큰 영향을 미쳤다. 이는 기초자산의 과거 역사적 변동성 보다 현재 옵션가격에서 도출한 내재변동성이 소버린 CDS에 더유의미한 영향을 미치고 있음을 의미한다. 마지막으로 주식시장과 옵션시장의 변동성 왜도(volatility skew) 또한 CDS스프레드의 결정에 유의한 영향을 미치고 있었는데 이는 외환 및 주식 옵션시장에서의 극단적 충격이 발생할 경우 즉각 CDS 시장에 반영되고 있음을 의미한다. 본 연구결과는 아직 연구가 활발히 진행되지 않고 있는 국내 소버린 CDS 가치평가 모델을 구현할때 유용한 시장변수를 선택하는데 기여를 할 것으로 예상된다. The growing academic literature highlights the information content of equity and currency options, and credit default swaps. Our findings will focus on a special role of option market information in explaining CDS spreads. Thus, we perform time-series regressions of CDS spreads on either implied or historical volatility of equity and currency markets using a broad sample of 1,570 daily observations for the period January 2006 to March 2012. Using data on sovereign CDS spreads, stock, and currency options, this study examines the relation between CDS, currency, and equity option volatilities. It is necessary to investigate which market options enhance the explanation power for determinants of CDS spread, and whether implied volatilities dominate historical volatilities in the determinants of CDS spread. Using time-series regressions, we find that currency market options enhance the explanation power for determinants of sovereign CDS spread, and that implied volatility dominates historical volatility in explaining CDS spreads. We find also the volatility skew of stock and currency options to be a significant determinant of CDS spreads. With this list of additional volatility variables included in the regressions, the explanation power of the time-series regressions has increased.