http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 안준천(J . C . An) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
이광전(K . J . Lee),박경도(K . D . Park),안준천(J . C . An),김계회(G . H . Kim),원진희(J . H . Won) 한국축산학회 1995 한국축산학회지 Vol.37 No.1
The objective of this study was to develop adjustment factors for racing distances, using a total of 53,097 racing records from 2,928 horses that had raced from January, 1990 to December, 1993. Results obtained were as follows. 1. Skewedness for racing time by each distance was near zero, and the data skewed a little to the right. 1Me entire data, however, was almost normally distributed. 2. Racing frequencies for progeny per sire decreased with increasing racing distance. In the case of the 2,200m race in which the largest number of exellent horses took part in competition, one record per sire was most widely distributed and the proportion was about 88% of all data Considering the unique distribution of Korean racing data, it was suggested that the entire data for various distances should be used for the genetic evaluation of racing horses. 3. Contemporary group effect for racing time made up about 40% of total variation, and this implied that contemporary effect was one of the important environmental factors for the genetic evaluation of racing horses. 4. Variances adjusted by additive factors showed homogeneous values for various distances, while those adjusted by multiplicative factors deviated greatly from unadjusted data, with increasing racing distances. 5. Correlations between PTA`s for additive adjusted and unadjusted records were shown to be about 0.99. This fact led to the suggestion that the additive adjustment factors would be more practical and reasonable for adjustments of racing distances.
-
이광전(K . J . Lee),박경도(K . D . Park),양영목(Y . M . Yang),최윤석(Y . S . Choi),안준천(J . C . An),신미영(M . Y . Sin) 한국축산학회 1992 한국축산학회지 Vol.34 No.4
A total of 6,338 racing times of 690 horses was used for this study. Data were repeated racing times of horses that raced at least three times at the 1000m race for a year, 1991 and collected from the Korean Racing Association (K.R.A.). Results obtained were as follows. 1. Investigated percentages of the total variance accounted for by contemporary group, month, day and race were 7.73%, 8.45% and 29.55%, respectively. Ratios ²σ_e/²σ_a and ²σ_e/²σ_p were 3.486 and 10.457, respectively. 2. Animal model used repeated racing times. Estimated breeding values of the horses ranged from -2.44 to +2.65. The regression coefficient and r² of the breeding value on birth-year were 0.04 and 0.001, respectively. Breeding value and permanent environmental effect did not have significant variation among the birth years. 3. The trait that has the highest correlation with estimated breeding values for repeated racing times was the average time. The correlation coefficient between the two traits and estimate of heritability for the average time were 0.86 and 0.41, respectively. 4. Performance index obtained by the multiple regression procedure of the estimated breeding values for the repeated racing times on the other traits was as follows. I = -47.6564 - 0.0193X₁ + 0.6405X₂ + 0.0972X₃ - 0.0047X₄ (r²=0.76) (X₁=best time, X₂=average time, X₃=poorest time, X₄=% races placed 1-2).
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
