• Title/Summary/Keyword: Chu-Baek

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A Model to Explain Temperature Dependent Systemic Infection of Potato Plants by Potato virus Y

  • Choi, Kyung San;Toro, Francisco del;Tenllado, Francisco;Canto, Tomas;Chung, Bong Nam
    • The Plant Pathology Journal
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    • v.33 no.2
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    • pp.206-211
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    • 2017
  • The effect of temperature on the rate of systemic infection of potatoes (Solanum tuberosum L. cv. Chu-Baek) by Potato virus Y (PVY) was studied in growth chambers. Systemic infection of PVY was observed only within the temperature range of $16^{\circ}C$ to $32^{\circ}C$. Within this temperature range, the time required for a plant to become infected systemically decreased from 14 days at $20^{\circ}C$ to 5.7 days at $28^{\circ}C$. The estimated lower thermal threshold was $15.6^{\circ}C$ and the thermal constant was 65.6 degree days. A systemic infection model was constructed based on experimental data, using the infection rate (Lactin-2 model) and the infection distribution (three-parameter Weibull function) models, which accurately described the completion rate curves to systemic infection and the cumulative distributions obtained in the PVY-potato system, respectively. Therefore, this model was useful to predict the progress of systemic infections by PVY in potato plants, and to construct the epidemic models.

Optimal Power Flow with Linear Programming (선형계획법을 이용한 최적조류계산)

  • Jung, G.H.;Baek, Y.S.;Song, K.B.;Chu, J.B.;Won, J.R.
    • Proceedings of the KIEE Conference
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    • 2000.11a
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    • pp.145-148
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    • 2000
  • This paper presents new algorithm which is based on LP(Linear Programming) that guarantee convergence. It is considered to minimize generation cost and load shedding as object function subject to various constraints. The proposed algorithm use sensitivity matrix to re-dispatch generation power, so the total CPU time is saved.

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A study on the analysis of Taegeuk Acupuncture focused on "Young Chu.GuChimSibYiWon" ("영추(靈樞).구침십이원편(九鍼十二原篇)"을 중심으로 한 태극침법(太極鍼法) 분석)

  • Lim, Gyo-Min;Baek, Jin-Ung
    • Korean Journal of Oriental Medicine
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    • v.18 no.2
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    • pp.25-38
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    • 2012
  • Objective : This study was conducted to underpin the theory of Taegeuk Acupuncture systematically and increase the utility of clinical trial and a range of application. Method : This study analysed ByungHaeng Lee's theory, who is the originator of Taegeuk Acupuncture, by focusing on "Young Chu GuChimSibYiWon" Result & Conclusion : 1. ByungHaeng Lee's thought about Viscera and Bowels is following medicine of Internal Classic. Even though JeMa Lee's thought about Viscera and Bowels has same name with ByungHaeng Lee's, but the functional meaning and related part is totally different. So, four constitution types in Taegeuk Acupuncture are different from four constitution types in Four-Constitution Medicine. Therefore, Taegeuk Acupuncture isn't related with Four-Constitution Medicine 2. On the authority of "Young Chu GuChimSibYiWon", we can extend 4 therapeutic acupuncture point combinations of Taegeuk Acupuncture to ten therapeutic acupuncture point combinations which tentatively named 'Five Viscera Source Point Acupuncture'. 3. To consider an example of eight constitutional acupuncture, Taegeuk Acupuncture thoroughly says constitutional acupuncture. Especially, JaeGyuKim's Taegeuk Acupuncture has specific diagnosis standard that after treating a patient with acupuncture, he checks an oppressive pain at the precordial region and a voiced sound at liver and then he makes sure constitution of patient. So we can consider JaeGyuKim's Taegeuk Acupuncture as constitutional acupuncture. However, it has to change the name of four constitution types to taegeuk greater yang person, taegeuk lesser yang person, taegeuk greater yin person, taegeuk lesser yin person so as to avoid confusion. 4. Taegeuk Acupuncture is markedly simple in comparison with other acupuncture, so it needs to extend the utility of clinics by enlarging treatment acupuncture points.

An Basic Estimation for the Mutual action of Seismic load-Pore Pressure about Fill dam (필 댐에 관한 지진하중-간극수압의 상호작용 평가를 위한 기초연구)

  • Jeung, Eu-Jung;Baek, Sung-Chu;Nam, Yel-Woo;Lee, Seom-Beom;Park, Inn-Joon;Kim, Hong-Taek
    • 한국방재학회:학술대회논문집
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    • 2007.02a
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    • pp.275-278
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    • 2007
  • In case of having no consideration for pore pressure, we may underestimate earthquakes in seismic analysis of fill dam. because we can not consider hydrodynamic pressures induced by earthquakes. Nevertheless, there are few actual results on hydrodynamic pressures variation due to the principal variables of seismic analysis of fill dam. So, in this study we study earthquake-pore pressure interaction performing divers variable analysis, as considering Sesimic load-Pore Pressure.

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