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Thompson-Lampard 정리를 적용한 마이크로미터 변위 측정을 위한 비접촉식 전기용량 센서 개발
金漢俊(Han Jun Kim),姜銓洪(Jeon Hong Kang),韓相玉(Sang Ok Han) 대한전기학회 2006 전기학회논문지 B Vol.55 No.9
Non-contacting capacitive sensor based on Thompson-Lampard theorem have been fabricated and characterized for measuring of ㎛ order displacements. To overcome disadvantages of the existed capacitive sensors of parallel plate type with 2-electrodes and 3-electrodes, the developed new sensor was designed to have 4-electrodes with a constant gap of 0.2 ㎜ between the electrodes. Two of the electrodes were used as a high potential electrode and a low one, the other two electrodes were used as guard electrodes. These electrodes were made from copper using RF sputtering system on a sapphire plate with diameter 17 ㎜ and thickness 0.7 ㎜. This sensor can be used for measuring the distance not only between the sensor and metallic target connected to ground potential but also non-metallic target without ground connection.
제주특별자치도 공공 청사 건립사업의 적정 사업비 산출 시스템 구축 방안 - 읍·면·동 청사, 경로당, 마을회관 등의 소규모 공공 청사 중심으로 -
김한준(Kim, Hanjoon),강상찬(Kang, Sang-Chan),장명훈(Jang, Myunghoun) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.1
Under the strengthening of local autonomy and decentralization, government offices are changing from the existing focus of administrative work and civil service to a hub of local communities that provides various complex functions and spaces such as local economy, society, culture and welfare. However, since there are no legal or institutional regulations for small public facilities, the plan is based on the will of the responsible departments or local residents, causing problems such as ostentatious buildings and budget waste. Therefore, this study investigates and analyzes standards and regulations for calculating appropriate areas and project budgets at domestic and abroad, and develops a Web-based appropriate project cost estimation system for establishing appropriate small-scale public office construction projects. It is expected that Web-based appropriate project cost calculation system for Jeju public government building will be utilized to prevent rational small-scale public facilities and budget abuse by providing basic guidelines necessary for the construction of public facilities during the planning phase of the small facility construction project, and to determine the appropriateness of the building.
저압직류 배전계통의 구성 형태를 고려한 공급신뢰도 분석에 관한 연구
김충모(Chung-Mo Kim),노철호(Chul-Ho No),한준(Joon Han),오윤식(Yun-Sik Oh),김현수(Hyun-Soo Kim),백인호(In-Ho Baek),김철환(Chul-Hwan Kim) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.2
At the end of the 19th century, Edison’s DC power system and Tesla’s AC power system was debated in power market. Finally, AC system became the primary system of the power market because both step-up and step-down of voltage by using transformer and long-distance power transmission are easily possible. However, nowadays the power market takes some action for introducing DC system. Both domestic and foreign researchers are conducting the study on the DC system as well. Some researchers have conducted the studies on power quality and economic evaluation of the DC distribution system but DC distribution system is still controversial in terms of the effectiveness and reliability. In this paper, we calculate the reliability indices of the Low Voltage Direct Current(LVDC) distribution system considering arrangement of power electronics, layout of the distribution system, and distance between load points.
김한준(Kim, Han-Joon) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.9
본 연구에서는 미국발 금융위기의 근본 원인과 국내,외 금융시장에서 관심의 대상이 되고 있는 장외파생상 품의 일종인 신용부도스왑(Credit Default Swap, CDS) 혹은 합성부채담보부채권에 대한 내용을 사전적으로 분석하였 다. 2007년부터 문제화가 되기 시작한 미국발 금융위기의 근본 배경으로서, 2000년부터 2008년 초까지 약 5배나 급 속히 상승한 국제유가 요인 등이 동 위기의 기조원인으로서 분석되었다. 기존의 국내기업 관련 CDS 스프레드 분석 연구결과 등과 비교하여(예: Park & Kim, 2011), 본 연구에서는 일반성(commonality)과 견고성(robustness)의 제고를 위하여, 해당 실증적 방법론과 변수들(즉, 산업별 더미변수들 포함한 총 18가지의 설명변수들과 종속변수들(3가지))의 활용에서도, 더욱 포괄적이고 심층적인 분석을 수행하고자 하였다. 결과와 관련하여, 종속변수인 CDS 스프레드의 재 무적 특성 혹은 결정요인으로서, 4가지 설명변수들 (무위험수익률, 이자율의 기간구조, 자산의 크기, 변동성)이 다중회 귀모형을 통하여 각각의 통계적인 유의성(5% 신뢰수준)을 나타낸 반면, 추가적인 설명변수의 발견을 위하여 주성분분 석을 사용한 결과, 5가지 변수들(체계적 위험(베타), 수익성, 매출액 성장성, 변동성, 장부상 부채비욜)이 CDS 스프레 드에 대한 유의성을 보였다. 상기 결과들의 robustness 제고를 위하여, 사용된 총 18가지의 설명변수를 종합적으로 활 용한 ‘단계적 회귀식(stepwise regression)'의 결과에서는 CDS스프레드의 대용치인 모든 종속변수에서, 다음의 4가지 설명변수들이 결정요인으로서 발견되었다: 무위험수익률, 이자율의 기간구조, 변동성, 체계적 위험(베타). 또한, 산업별 유의성 관련, 수출주도형 산업으로 분류되는 자동차산업과 철강산업은 종속변수와 음(-)의 상관관계를 나타낸 반면, 내수업종인 통신서비스업종은 양(+)의 유의성을 보였다. This study examined the background of the recent global financial crisis and the concept of one of the financial derivatives such as the credit default swap(CDS) or synthetic CDO(collateral debt obligations), given the rapid growing and changing the over-the-counter derivative markets in their volume and structures. In comparison with the previous literature such as the study of Park & Kim (2011), this research empirically performed more thorough and comprehensive investigations to find any financial characteristics or attributes to determine the CDS spreads. Regarding the results obtained from the multiple regression models, the explanatory variables such as STYIELD3, SLOPE, INASSETS, and VOLATILITY, showed their statistically significant effects on all the tested dependent variables(DVs). Another procedure such as the principle component analysis(PCA), was also performed to account for additional IDVs as possible determinants of the dependent variables. Subsequent to this analysis, larger coefficients of each corresponding eigenvector such as BETA, PFT2, GROWTH, STD, and BLEVERAGE were found to be possible financial determinants. For robustness, all the IDVs were employed to be tested in the 'full' regression model with stepwise procedure. As a result, STYIELD3, SLOPE, and VOLATILITY, and BETA showed their statistically significant relationship with all the dependent variables of the CDS spreads.
상보 동적 증폭기 기반 4배 시간 영역 인터폴레이팅 Flash ADC
김한준(Hanjun Kim),양웅기(Woongki Yang),김유승(Yuseung Kim),오동렬(Dongryeol Oh) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6
In this paper proposes a 4-times Time-Domain Interpolating Flash ADC Based on Complementary Dynamic Amplifier using the 500nm CMOS process. The design employs complementary dynamic amplifier (CDA) to reduce power consumption and is configured to reduce area and input capacitance through Time-Domain Interpolation (TDI). As a result, the final resolution of 3.93 bits is confirmed based on layout design and simulation results.