• 제목/요약/키워드: Kim DooJong

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한방용약에 관한 생약학적 조사연구(I) -상용국산(常用國産) 한약(漢藥)의 규격화(規格化)- (Pharmacognostical Investigation on the Oriental Medicine I -Standardization of Domestic Oriental Drugs-)

  • 류경수;홍남두;김종우
    • 생약학회지
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    • 제6권4호
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    • pp.219-250
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    • 1975
  • The consumptions of oriental drugs are increasing year by year in Korea. However, there is no official standards or even proposal of the professional organizations. One hundred and twenty usual profitable items of oriental drugs are selected and attempted to standardize their origins, appearances, properties, purities and identification reactions in order to evaluate those qualities.

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막대형 밸브리스 압전펌프의 변위 분포 해석 (Vibration analysis of valveless Type Piezoelectric micro-pump)

  • 임종남;오진헌;임기조;김현후
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 Techno-Fair 및 추계학술대회 논문집 전기물성,응용부문
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    • pp.119-120
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    • 2008
  • Using the extensional vibration mode of PZT bar, a piezopump is successfully made. The traveling extensional wave along the circumference of the bar is obtained by dividing standing waves which are temporally and spatially phase shifted by 90 degrees from each other. The proposed piezopump is consisted of coaxial cylindrical shells that are bonded piezoelectric ceramic bar.

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특정지역 신뢰도평가 방안 (Reliability Evaluation for A Specific Area)

  • 문승필;백두현;장병훈;전동훈;윤종수;김수열;최재석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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    • pp.374-376
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    • 2005
  • Due to the pressure of opening electric power market, the transmission system reliability evaluation is being more important. This paper presents a reliability evaluation method for a specific area using the elastic power system frequency decline characteristic. The practicality and effectiveness of this methodology is illustrated by a case study.

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내부 삽입강관에 의한 콘크리트 구속효과 연구 (The Confining Effect of Concrete by Internal Steel Tube)

  • 김홍중;한택희;강영종;정두석
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2003년도 추계학술대회 논문집(II)
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    • pp.501-509
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    • 2003
  • The confining effect of concrete was studied when a steel tube is set at the inside face of a hollow reinforced concrete column. To investigate the confining effect by a steel tube, 36 specimens were tested and compared. Test results show that the inserted steel tube provide sufficient confinement to the confining effect depends on the thickness of the steel tube. And also, test results show that the provided confinement by a steel tube increase the strength of concrete.

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Synthesis of 2-(Allylthio)pyrazines As a Novel Cancer Chemopreventive Agent

  • Lee, Jong-Wook;Lee, Bong-yong;Kim, Nak-Doo
    • Archives of Pharmacal Research
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    • 제24권1호
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    • pp.16-20
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    • 2001
  • 2-(Allylthio)pyrazine derivatives were designed as a novel cancer chemopreventive agent that functions through selective inhibtion of cytochrome P-450 and induction of phase 11 enzymes involved in the detoxification of carcinogens. A practical preparation method of 2-(allylthio) pyrazine derivatives was established by the reaction of 2-mercaptopyrazine and allylbromides in the presence of a catalytic antioxidant, DABCO (1,4-diazabicyclo[2,2,2] octane), in dimethyl-formamide at below $50^{\circ}C$.

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블럭펄스 변환에 의한 비선형계의 준최적제어에 관한 연구 (Suboptimal Control of Nonlinear Systems via Block Pulse Transformation)

  • 안두수;김종부;이승
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1990년도 하계학술대회 논문집
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    • pp.81-84
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    • 1990
  • This paper presents a method of sub-optimal control for nonlinear systems via block pulse transformation. The adaptive optimal control scheme proposed by J.P. Matuszewski is introduced to minimize the performance index. The proposed method is simple and computationally advantageous. Viablity of the this method is established with simulation results for the van der Pole equation for comparision with other methods.

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A Replica Molding Technique for Fabricating Liquid Crystal Displays with Wide Viewing Characteristics

  • Kim, Yeun-Tae;Hong, Jong-Ho;Choi, Yoon-Seuk;Lee, Sin-Doo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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    • pp.371-373
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    • 2005
  • We demonstrated a replica molding technique for producing a self-formed multidomain structure displays (LCDs). The multidomain structure was naturally obtained on a replica mold film having periodic patterns which have two dimensional microgrooves. It was found that with the axially symmetric multidomain structure along the microgrooves exhibits excellent viewing characteristics.

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