http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
강남기,임욱,유찬세 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-
본 논문에서는 소결 후 20 ㎛정도의 두께를 갖는 ceramic green sheet를 이용하여 초소형(1005) 칩 인덕터를 제작하였다.인덕터의 패턴을 최적화함에 있어서 HP사의 HFSS(High Frequency Structure Simulator)를 이용하였고 이 과정에서 인덕터의 전기적 특성, 등가회로등을 추출하였다.칩 인덕터를 제작함에 있어서 모든 적층 공정을 최적화하였다.실제 제작한 인덕터와 simulation 결과의 관계성을 도출하고 이를 통해 목표 용량을 tuning하였다.이와 같은 과정을 통해 1∼39 nH의 인덕턴스를 갖는 1005 크기의 칩 인덕터를 개발하였고, 이를 선진사의 제품과 비교할 때 우수한 전기적 특성을 나타내었다.
강남기,김경환 慶尙大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.13 No.-
The permitted left-turn is one of major traffic management technique to improve traffic operation at signalized intersections. In order to operate the permitted left-turn effectively, the traffic characteristics of permitted left-turn should be analyzed accurately. In this study, the models to estimate ??(the potion of effective green until the arrival of the first left-turning vehicles). ??(the portion of effective green blocked by the clearance of an opposing queue of vehicles), ??(proportion of left turns in shared lane) were developed by field data. Also the equation to estimate the permitted left-turn capacity and the process to obtain the left-turn adjustment factors for the permitted left-turn were suggested. The conclusions of this study could be summarized. 1. A model to estimate ?? was developed by the field data in which the number of left turns per cycle(LTC) varied from a low of 1.0 veh/cycle to a high of 5.0 veh/cycle. 2. A model to estimate ?? was developed by using the opposing flow per lane per ?? and opposing queue ?? as independent variables. 3. A simplified model to estimate ?? was developed by using an independent variable, LTC. 4. An equation to estimate the permitted left-turn capacity was suggested by employing gu' the potion of the effective green during which left turns filter through the opposing flow.
수용액중에서 산소산화에 의한 Mn-zn 페라이트 합성 및 특성에 관하여
오재현,강남기,박래은,박병호 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.11
The conditions for the formation of Mn-Zn ferrite by oxygen oxidation in aqueous suspension were investigated with various pH, temperature, and Mn/Zn molar ratio and were compared with those of Mn ferrite and Zn ferrite. The oxidation products were then examined by XRD, chemical analysis, electron microscopic observation and magnetic property measurements. The most favorable pH at 70℃ to form the Zn and Mn ferrite and 9.0 and 12.0 respectively. In Mn-Zn ferrite formation, the reaction temperature affected the amount of Zn incoporated into ferrite than that of Mn. When changing the Mn/Zn molar ratio, it is possible to control the chemical composition of Mn-Zn ferrite. At temp. 70℃, M/Fe molar ratio 0.5, Mn/Zn molar ratio 1.5 and pH 11, Mn-Zn ferrite is obtained that has nearly stoichiometrical composition Mn_(0.45)Zn_(0.51)Fe_(2.04)O₄ and its saturation magnetization was 38 emu/g.
오재현,강남기,김만,김성완 대한금속재료학회(대한금속학회) 1994 대한금속·재료학회지 Vol.32 No.4
The water-based magnetic fluids were prepared with the synthesized ultrafine magnetite using sodium oleate and lauric acid as surfactants. The dispersion ratio of water-based magnetic fluids was maintained constantly when the added amounts of sodium oleate and lauric acid for magnetite(20g) were more them 1.6×10^(-2)㏖, 3.0×10^(-2)㏖ respectively. The stable pH region for the magnetic fluids prepared with sodium oleate and lauric acid was range of pH 8.0 to pH 10.0. As the solid content increased from 0.05 g/cc to 0.5g/cc, the viscosity of water-based magnetic fluids increased from 0.97 cp to 12.08 cp, and its saturation magnetization at 5kOe increased from 3.1 emu/g to 20.6 emu/g. Water-based magnetic fluids were able to redisperse to kerosene-based or water-based magnetic fluids by adding kerosene and NH₄OH solution to dried water-based magnetic fluids. However in the case of redispersed water-based magnetic fluids, the saturation magnetization decreased with increasing iteration.