• Title, Summary, Keyword: SIAS

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Studies on the use of computer aided semen analysis(CASA) technology for fertility prediction in Korean native cattle (한우에서 Computer aided semen analysis(CASA) 기법을 이용한 수태율 예측에 관한 연구)

  • Lee, Kang-nam;Lee, Byeong-chun;Hwang, Woo-suk
    • Korean Journal of Veterinary Research
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    • v.38 no.4
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    • pp.882-897
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    • 1998
  • This experiment was conducted to predict the effects of motional characteristics on the fertility of Korean native cattle(KNC) by using CASA technology and in vitro fertilization system. Twenty-six KNC frozen semen straws were obtained from Korean KNC improvement department, livestock improvement main division, national livestock cooperatives federation in Korea. Specimens were allowed to thaw at $37^{\circ}C$ for 30 sec in water bath. Semen analysis was performed on semen image analysis system(SIAS, Medical supply, Korea) adjusted to the gate settings and used the semen droplet ($5{\mu}l$) placed on Makler counting chamber(Sefi medical instrument, Israel) prewarmed at $37^{\circ}C$. The same person used the same micropipette to fill the Makler counting chamber. A total of 150 or more of sperms were analysed in each specimen by a single trained person by scanning at least 5 to 10 fields. The oocytes collection, in vitro maturation, IVF, in vitro culture and determination of the cleavage rate were performed by the technique, as described by Hwang et al (1997). Statistical analysis was done by linear regression with use of the Sigma plot program on a IBM personal computer. The cleavage rate in vitro fertilized oocyte was significantly correlated(P<0.05) with MOT, VCL, VSL, VAP, ALH, BCF and MAD, but not CON, LIN, STR, WOB, DNM, DNC and HYP in regressional analysis. The results show that some kinematic characteristics of frozen-thawed semen by CASA can be predict the fertility in in vitro model system.

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Development of Selection Model of Subway Station Influence Area (SIA) in New town using Categorical and Regression Tree (CART) (CART분석을 이용한 신도시지역의 지하철 역세권 설정에 관한 연구)

  • Kim, Tae-Ho;Lee, Yong- Taeck;Hwang, E-Pyo;Won, Jai-Mu
    • Journal of the Korean Society for Railway
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    • v.11 no.3
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    • pp.216-224
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    • 2008
  • In general, based on criteria of subway law, radius 500m from subway station is defined as SIA(Subway Station Influence Area). Therefore, in this paper, selection models of SIA are developed to identify appropriate SIA for recently developed 4 new towns based based on CART analysis. As a result, following outputs are obtained; (1) walking distance from subway station is the most influential factor to define SIA (2) SIAs vary with new towns (i.e., bundang city: 856m, ilsan sanbon city 508m, pyungchon city 495m), and (3) walking distance from subway station is influential to land price of SIA. In addition, bundang and pyungchon new town are more affected in land price and walking distance. Therefore, it is desirable for current definition of SIA (radius 500m from subway station) to reflect characteristics of land use and walking distance in the new towns.