• 제목/요약/키워드: Suk-Mun

검색결과 772건 처리시간 0.03초

SURFACE BRIGHTNESS DISTRIBUTION ON NGC 7755

  • Chun, Mun-Suk;Sohn, Seong-Min
    • Journal of Astronomy and Space Sciences
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    • 제9권1호
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    • pp.1-10
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    • 1992
  • Isophote map and luminosity profile of the barred spiral galaxy NGC 7755 are obtained from PDS scanning of PAL 0-471 plate. From the isophote map, NGC 7755 can be classified SBbc(r) with asymmetric bar ring. We get several physical parameters $({M_T}^\circ,U(R)_{CB},U(R)_{CD},D/B,C_{jj},M/L)$ of NGC 7755 from the analysis of the luminosity distribution.

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EXTREME LONG PERIOD ECLIPSING BINARY EPSILON AURIGAE -Spectroscopic Study-

  • Chun, Mun-Suk;Park, Jang-Hyeon;Jeong, Jang-Hae
    • Journal of Astronomy and Space Sciences
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    • 제7권1호
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    • pp.47-55
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    • 1990
  • From the study of a spectroscopic plate of $\varepsilon$ Auriage, we can measure the radial velocity and the relative abundance for this eclipsing binary. Calculated radial velocity is -37Km/s and the abundance of [Fe] is estimated as -1.5.

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High gain pentacene inverter using different pentacene-thickness in several dielectrics

  • Mun, Sung-Jin;Lee, Ki-Moon;Lee, Kwang-H.;Oh, Min-Suk;Im, Seong-Il
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.826-829
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    • 2009
  • The authors report on the fabrication of p-type depletion mode inverter that composed of two pentacene based thin-film transistors (TFTs) on several dielectric surfaces. We use shift of threshold voltage depends on pentacene-thickness.

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유전알고리즘을 이용한 BLDC전동기 영구자석의 코깅 토크 최소화 최적설계 (Optimum Design for Cogging Torque Minimization in BLDC Motor Magnet using Genetic Algorithm)

  • 전문호;김창업;이석원
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 B
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    • pp.860-862
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    • 2004
  • 본 논문에서는 유전알고리즘과 유한요소법을 이용하여 BLDC 전동기의 코깅 토크를 최소화하기 위한 최적화 설계 방법을 제안하였다. 먼저 유전알고리즘을 이용하여 BLDC 전동기의 설계 변수를 추론하고, 유한요소법으로 코깅 토크를 구하였다. 유전알고리즘과 유한요소법을 사용함으로써 BLDC 전동기의 코깅 토크가 최소화 되는 영구자석의 형상을 전 영역에서 빠른 시간내에 구할 수 있었다.

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Synthetic Color Magnitude Diagrams of Galactic Globular Clusters

  • Park, Jang-Hyein-;Lee, Young-Wook-;Chun, Mun-Suk
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 1993년도 한국우주과학회보 제2권2호
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    • pp.19-19
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    • 1993
  • We have developed a new method to simulate the observed color magnitudediagrams for Galactic globular clusters. The model calculations include all evolutionary phases- from zero age main sequence to asymptotic giant branch. Using these models, we can simulate directly the observational errors and sampling effect and also can examine the stellar evolution theory in more$.$ realistic way. Implications of these model calculations on the recent space observations of globular clusters and other systems will be discussed.

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