Progress Report on Development of the MIRIS, the Main Payload of STSAT-3

박영식,한원용,이대희,정웅섭,문봉곤,박귀종,표정현,이덕행,남욱원,박장현,선광일,양선철,박종오,이승우,이형목,Park, Youngsik,Han, Wonyong,Lee, Dae-Hee,Jeong, Woong-Seob,Moon, Bongkon,Park, Kwijong,Pyo, Jeonghyun,Lee, Duk-Hang,Nam, Uk-Won,Park, Jang-H 한국천문학회 2012 天文學會報 Vol.37 No.2

MIRIS (Multipurpose Infra-Red Imaging System), the main payload of STSAT-3 (Science and Technology Satellite-3), is the first Korean Infrared Space Telescope developed by KASI (Korea Astronomy and Space Science Institute). The FM (fight model) of MIRIS has been recently completed, and various performance tests have been made to measure system parameters such as readout noise, system gain, linearity, and dark current. The MIRIS FM has been integrated to the satellite system for the environment tests scheduled in September 2012. The MIRIS is expected to be launched in November 2012.

산학서(算學書)에서의 분수셈에 대한 고찰

박영식,최길남,Park, Young-Sik,Choi, Kil-Nam 영남수학회 2008 East Asian mathematical journal Vol.24 No.5

In this paper, we investigate reduction and four rules of fractional calculation on GuJangSulHae and the other Sanhakseo, and elementary school mathematics education.

Vanadate가 심근막을 통한 $Ca^{++}$의 유입 및 유출에 미치는 영향

박영식,안덕선,강두희,Park, Young-Shick,Ahn, Duck-Sun,Kang, Doo-Hee 대한생리학회 1986 대한생리학회지 Vol.20 No.2

Since it was proposed that vanadate may be an ‘ideal endogenous regulator of the $Na^+,\;K^+-ATPase$ activity (Cantley et at, 1979), vanadate has been a subject of intensive research and a variety of its physiological effects have been described (Nechay, 1984). In isolated guinea pig heart muscle vanadate shows a positive inotropic effect on ventricular muscle, while it induces a negative inotropic effect on atrial muscle. But its underlying mechanism has not been elucidated so far. Therefore, in this study the flux rates of calcium ion into and from guinea pig heart muscle were measured to throw some light on the underlying mechanism, because those rates have been known to be closely related to the cardiac contractility and the results are summarized as follows: 1) Calcium efflux rates from the intracellular $Ca^{++}$ pool (compartment 4) of both guinea pig left atrium and right ventricle were significantly reduced by vanadate and their pool sizes were significantly increased by vanadate. 2) The magnitude of calcium influx into left atrium was reduced by vanadate, While the magnitude of calcium influx into right ventricle was not affected by vanadate. From these results, it may be concluded that the positive inotropic effect of vanadate on the ventricular muscle was due to a reduced efflux rate of calcium ion and its negative inotropic effect on atrial muscle was resulted from a reduced influx of calcium ion.

4배체 포도간 교배된 이상자엽실생으로부터 저·고4배체 식물의 선발

박영식,김인종,박성민,Park, Young-Sik,Kim, In-Jong,Park, Sung-Min Korean Society of Horticultural Science 2010 원예과학기술지 Vol.28 No.5

본 실험은 4배체 포도의 방임수분과 인공수분으로부터 획득된 실생으로부터 이상자엽의 형태적 특성을 조사하였고, 특히 이들 이상자엽 실생으로부터 저 고4배 식물을 선발하였다. 이상자엽은 크게 5 형태로 구분되었다. 4배체 4품종의 방임수분 실생에서 이상자엽의 발생빈도는 1.6%로 조사되었고, 이상자엽실생 중 이수체 발생율은 20.4%이었다. 4배체 품종의 방임수분에서 얻어진 이수체 식물은 3개체(4n = 4x-2 = 74), 4개체(4n = 4x-1 = 75), 3개체(4n = 4x+1 = 77)로 총 10개체이었다. 4배체 16품종간 교배실생에서 이상자엽의 발생빈도는 3.4%이었다. 이상자엽실생 중 이수체 발생율은 22.0%이었다. 4배체 품종간 교배에서 얻어진 이수체 식물은 2개체(2n = 4x-2 = 74), 9개체(2n = 4x-1 = 75), 1개체(2n = 4x+1 = 77), 1개(2n = 4x+3 =79)로 총 13개체이었다. 본 실험결과 4배체 포도품종간 인공교배를 통해서 얻어진 이상자엽실생들은 대부분 이수체식물로 육묘단계에서 효율적인 선발이 가능성한 것으로 나타냈다. We observed abnormal morphology of cotyledons occurring in seedlings derived from open-pollinated and cross-pollinated tetraploid grapes and selected aneuploids, especially hypo- and hyper-tetraploid in seedlings with abnormal morphology of cotyledons. Five types of morphologically abnormal cotyledons were observed. In open-pollination of four tetraploid grapes, the frequency of abnormal cotyledons was 1.6% (49 of 3029 seeds). Percentage of aneuploids in the seedlings of abnormal cotyledons was 20.4% (10 of 49 seedlings). Aneuploids in open-pollination consisted of three (4n = 4x-2), four (4n = 4x-1), and three (4n = 4x+1) seedlings. In cross-pollination of tetraploids, the frequency of abnormal cotyledons was 3.4% (59 of 1729 seeds). Percentage of aneuploids in the seedlings with abnormal cotyledons was 22.0% (13 of 59 seedlings). Aneuploids from cross-pollination of tetraploids consisted of two (4n = 4x-2), nine (4n = 4x-1), one (4n = 4x+1), and one (4n = 4x+3) seedlings. According to the results, although the abnormal cotyledon morphology of seedlings obtained from crossing between tetraploid grapes appeared at low rate (2.3%), aneuploid seedlings occurred at high rate (22.0%); therefore, it indicated that this selection strategy might be very efficient in the initial seedling stage.

Dunaliella salina 의 광 제한 현탁 연속배양에 의한 ${\beta}$-carotene 의 생산

박영식,유호금,오상집,이현용,Park, Young-Shik,You, Ho-Keum,Ohh, Shang-Jip,Lee, Hyeon-Yong 한국미생물 · 생명공학회 1993 한국미생물·생명공학회지 Vol.21 No.4

It was proved that the cell growth followed a photo-inhibition model in light-limited turbidostat cultivation, having 1.06 (1/h) of maximum specific growth rate and 0.00094(kcal/$cm^2$/h) and 0.063 (kcal/$cm^2$/h) as half saturation and light inhibition constants, repectively. ${\beta}$-carotene production showed a growth related porcess. And the activation energy of Dunaliella salina was roughly estimated as 12.36 (kcal/mole) in employing Arrhenius relationship. It should also point out that relatively much porduction of ${\beta}$-carotene was observed at hight light intensity with yieding 1.04 (mg-carotene/g-dry cell/day) of specific product production rate while the cell growth was decreased. The optimal conditions of producing ${\beta}$-carotene in turbiodostat cultivation were as follows: $7.5{\times}10^{-3}$(kcal/$cm^2$/h)of light intensity, 2 (mM) and 50(mM) of nitrate and sodium bicarbonate concentrations and 100(ml/h) of $CO_2$ flow rate.

Economic Production of $\gamma$-Interferon from Recombinant Human Cells in Serum Free Medium by a Moving Aeration Membrane Bioreactor

박영식,김현규,임서규,박경유,이현용,Park, Young-Shik,Kim, Hyun-Kyu,Lim, Seo-Kyu,Park, Kyung-You,Lee, Hyeon-Yong 한국미생물 · 생명공학회 1994 한국미생물·생명공학회지 Vol.22 No.4

8 X 10$^{6}$(viable cells/ml) of maximum cell density and 9000(IU/ml) of $\gamma$-IFN production were obtained at 55(ml/hr) of a perfusion rate by cultivating HSF cells using a moving membrane aeration bioreactor. This system proves to be an efficient culture process by maintaning 90% of viable cells during the whole cultivation periods. The metabolic molar quotient of glucose to lactate was 0.81 for overall ranges of glucose consumed while the evolution of ammonia was not linearly related to the consumption of glutamine. Low molar conversion ratio was observed in low consumptions of glutamine and high molar conversion ratio in high comsumptions. It also shows that the glutamolysis plays important role in the steady state conditions by evolving larger quantities of ammonia than lactate. At the above of 50 rpm, which is the optimum agitation speed for this bioreactor, the cell growth was severely affected while the IFN production was less decrea- sed, maintaing 1.5 X 10$^{-3}$(IU/cell/day) specific IFN production rate. The cumulatvie $\gamma$-IFN production was 7.2 X 10$^{8}$(IU) for 70 days of the cultivation, which yields 1 X 10$^{7}$ (IU/day) of IFN production rate. Therefore, a commercial production of $\gamma$-IFN by this culture process can be achievable by maintaining the above IFN productivity in a scaled-up culture system.

미디안 필터링을 이용한 혜성의 이미지 처리기법

박영식,이충옥,진호,박장현,한원용,Park, Y.S.,Lee, C.U.,Jin, H.,Park, J.H.,Han, W.Y. 한국천문학회 2007 天文學論叢 Vol.22 No.4

The detection and measurement of faint features in cometary image is generally troublesome due to the high value of the ratio of the brightness of the nucleus to the tail, the large size and low surface brightness of the coma and tail and the disturbing presence of field stars trails. The image processing is based on background removal by median filtering. Sample results are shown for the case study of comet 73P/Schwassmann-Wachmann 3.

소규모 오수처리를 위한 $A_{2}O$ SBR과 $A_{2}O$ SBBR에서 유입 유기물 농도변화에 따른 염양염류 제거 특성 비교

박영식,정노성,김동석,Park, Young-Seek,Jeong, No-Sung,Kim, Dong-Seog 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.5

Laboratory scale experiments were conducted to study the conversion of sludge from conventional activated sludge to nitrogen-phosphorus removal sludge using two types of sequencing batch reactor (SBR) systems, a conventional SBR and sequencing batch biofilm reactor (SBBR). The nitrogen and phosphorus removal characteristics were similar between SBR and SBBR and the removal efficiencies were very low when the influent TOC concentrations were low. The nitrogen and phosphorus removal efficiencies in SBR were 96% and 77.5%, respectively, which were higher than those in SBBR (88% and 42.5%) at the high influent TOC concentration. In SBBR, the simultaneous nitrification-denitrification was occurred because of the biofilm process. The variations of pH, DO concentration and ORP were changed as the variation of influent TOC concentration both in SBR and SBBR and their periodical characteristics were cleary shown at the high influent TOC concentration. Especially, the pH, DO concentration and ORP inflections, were cleary occurred in SBR compared with SBBR.

가시화 영상의 웨이브렛 해석

박영식,김옥규,Park, Young-Sik,Kim, Okug-Gyu 한국융합신호처리학회 2007 융합신호처리학회 논문지 (JISPS) Vol.8 No.3

영상처리에 있어서 갑작스러운 신호와 불확실한 시스템의 특징을 정확하게 표현하기 위하여 많은 연구가 수행되어 왔다. 많이 알려진 퓨리어 변환은 임의 신호의 주파수 해석에 폭넓게 사용되어 왔다. 그러나 이 방법은 시간 축에서 발생하는 갑작스러운 신호 변환과 비정상적인 신호를 주파수 변환 영역에서 나타낼 수 없으므로 유용하지 않다. 본 논문은 이산 웨이브렛을 이용한 영상해석을 하였다. 이는 웨이브렛 영역에서의 극대치는 Lipschitz 지수 표현이 가능하고, 또한 극대치만 사용하여 영상 데이터의 윤곽선 및 데이터 특성을 표현하는 유용함을 나타내었다. 더욱이 적은 극대치만을 사용하여 본래 영상을 재생하는 것도 가능하게 되었다. fractal 해석은 예로서 적용되었다. 그리고, 모형 배에서 기름 띠의 가시화 영상이 해석되었다. 극대치 해석으로 fractal 변수를 구하고, 가시화 영상 해석의 실험으로 양호한 결과를 얻었다. The many studies have been proceeding to express accurately the feature of a sudden signal and a uncertain system in the image processing field. It is well know that Fourier Transform is widely used for frequency analysis of any signal. However, The frequency transform domain is not used for expressing the sudden signal change and non-stationary signal at the time-axis by this method. This paper describes of image analysis by discrete wavelet transform. Wavelet modulus maxima on transformed plane gives the Lipschitz exponent expression, which is useful to examine the characteristics of signal or the edge of an image. It is possible to reconstruct the original image only using the few maxima points. The fractal analysis is applied as an examples. The visualized image of oil flow on a ship model is analyzed. The fractal variable is obtained by the maxima analysis and the good results on the exprement is obtained by the visualized image analysis.

학생처장의 빛과 그늘

박영식,Park, Yeong-Sik 한국대학교육협의회 1983 大學敎育 Vol.2 No.-