• The Korea Swine Journal
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• v.9 no.10 s.98
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• pp.82-89
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• 1987

• The Korea Swine Journal
• /
• v.9 no.10 s.98
• /
• pp.90-94
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• 1987

• The Korea Swine Journal
• /
• v.9 no.10 s.98
• /
• pp.95-103
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• 1987

• KOREAN POULTRY JOURNAL
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• v.33 no.7 s.381
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• pp.92-95
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• 2001

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.spc1
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• pp.185-192
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• 2006

This experiment was conducted to assess genetic diversity of waxy corn inbred lines and to identify SSR markers related to major characteristics affected kernel quality for improving waxy corn $F_1$ hybrid with good quality. Diversity of 64 waxy com inbred lines was evaluated using 30 microsatellite markers. The 30 microsatellite markers representing 30 loci in the maize genome detected polymorphisms among the 64 inbred lines and revealed 225 alleles with a mean of 7.5 alleles per primer. The polymorphism Information content (PIC) value ranged from 0.14 to 0.87, with an average of 0.69. Based on Nei's genetic distances, the 64 inbred lines were classified into 9 groups by the cluster analysis. The group I included 26 inbred lines (41%), other groups included 3 to 9 inbred lines. One-way analysis of variance was conducted to identify significant relationship between individual markers and major characteristics that affect kernel quality. The analysis showed that umc1019 was related to amylopectin and crude protein content, me 1020 to amylopectin content and peak viscosity, and bnlg1537 to 100-kernel weight, kernel length, and kernel width.

• Korean Journal of Poultry Science
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• v.20 no.1
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• pp.1-9
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• 1993

This study carried out to build up new synthetic egg production lines which had sex-linked gene for feather color sexing and also superior combining ability for producing the best commercial chicks. The closed flock breeding method was utilized to improve the general performances in the first experiment and combining ability for heterosis was tested for new synthetic line in the second experimental year. In order to test for the egg production ability in cross breeds synthetic lines, the crossing of B$\times$4 B$\times$C, two imported strains and two domestic strains as controls were compared for the general performances. There was on difference in mortality, body weight to 56 weeks of age. Sexual maturity was delayed about 10 days by comparing with other reports, except 153 days of the Manina White, but no difference among mating systems in this experiment. The hen housed egg production in B$\times$A, B$\times$C was 186.3, 191.3 respectively and it was better than the other controls, except ISA imported lines. The hen-day egg production of B$\times$A, B$\times$C was better than other controls, with 75.7%, 76.8% respectively. In the average egg weight, the B$\times$C cross breed was highest with 64.5g. As the sex of hatching chicks was identified by difference of feather color, the genetic composition of synthetic lines must be homogenized. The feather color of female chicks was brown and that of male was silver (99%), In conclusion, the egg production ability of B$\times$A, B$\times$C cross breeds was superior to the imported and domestic lines. Therefore, it suggest that the synthetic lines with sex-linked gene might be utilized for improving egg production performances.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.257-258
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• 2011

풍력 발전 시스템은 경제성이 비교적 높은 신재생 에너시 시스템으로 전세계적으로 대규모 단지를 조성하여 전력계통과 연계하여 운용되고 있다. 풍력 발전 단지의 계통에 대한 영향력이 커짐에 따라 독일, 덴마크, 캐나다 등 세계 각국의 계통 연계 기준이 강화되어, 기존과 달리 계통에 협조적인 풍력 발전 시스템이 요구되고 있다. 본 논문에서는 국가별 계통 연계 기준을 만족할 수 있는 간단한 LVRT 제어 전략을 제시하며, 10kW급 계통 연계 인버터와 계통 사고 모의 장치를 통하여 다양한 계통 사고 상황에 대한 제어 전략의 타당성을 검증하였다.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1999.10a
• /
• pp.200.1-200
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• 1999

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.2220-2221
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• 2008

전기계통설계 도면인 Single Line Diagram(단선도), Schematic Diagram(전개접속도), Cable Block Diagram/Cable Schedule, Cable Termination/Connection Diagram(단말결선)의 도면 상호간 데이터 연계에 의한 자동, 통합형태의 Intelligent 전기계통 도면 작성 프로그램 개발에 대한 기본적인 방향에 대하여 소개하고자 한다.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.699-700
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• 2007

변전소 보호, 제어, 감시와 자동화 능력을 선진화하면서 송변전설비 건설, 보수, 운영 및 관리비용을 확실하게 줄이기 위한 계획과 노력이 진행 중이다. 세계적인 전력설비의 IT화 추세와 변전자동화(Substation Automation)전용 국제통신규격(IEC-61850) 기반 조성으로 차세대 변전시스템 개발의 효율성 증대 되므로 한국전력 계통에 시범 사업에 적용하여 선진기술을 도입하여 계통 보호와 제어 감시의 사례를 검토한다.