Judul: Production performance of prolific Javanese sheep
Abstrak: The production performance of 425 Javanese ewes based on 1143 records produced at the Cicadas sheep Research Station of the Research Institute of Animal Production, Bogor, Indonesia, was evaluated in this study. Although the focus was on the effect of prolificacy and some major environmental causes of variation on lamb survival and ewe output at weaning, the analysis included other traits such as litter size, age at first lambing and lambing interval. Results concerning variation of litter size were consistent with previous studies and with a major gene hypothesis proposed to explain the genetic variation of the trait. Three lines of prolificacy classified as noncarriers or low line (LL) and carriers of the gene: medium (ML) and high line (HL) averaged 1.24, 1.81 and 2.26 lambs, respectively. from Ewes different prolificacy lines performed distinctly in different years (P<0.01); with HL animals being more sensitive to environmental fluctuation. Primiparous ewes had 10 to 13% smaller litters (P<0.01) than ewes at later parities. The repeatability for litter size was 0.51 while the within line 0.33, 0.15 and 0.24 Heritability was 0.62. for LL, Changes ML, in and HL, respectively. survival were due to Prolificacy-Year and ewe weight gain during gestation (P<0.01). Survival in the HL was 44% lower than that of ML and LL in poor years. Lamb survival for quadruplets was 86, 67, 44, singles, and twins, triplets and 31% respectively. Lower survival of their lambs (64.9%) as compared to later parities (74.6%) (P<0.01), was recorded in primiparous ewes mainly due to low body weights. Two main causes associated with lamb mortality were studied: ewe weight gain during gestation and lamb birth weight, which have a relative contribution of in the determination of this trait…dst
Keyword: Sheep production, Lamb Size At Birth, Lamb Production At Weaning

Judul: Identifikasi Produktivitas Induk Domba yang Digembalakan sebagai Dasar Kriteria Seleksi di Unit Pendidikan Penelitian dan Peternakan Jonggol Institut Pertanian Bogor (UP3J-IPB).
Abstrak: Local sheep is one of the animal genetic resources which is potential to be developed in supporting national meat supply. Local sheep has some superiorities such as twinning birth, early mature age and non seasonally breeding. Nevertheless, instead of these superiority, some problem still occurred as lacking of lamb survivability rate, low carcass percentage and high variances both genotype and phenotype parameters. The objectives of this study were to find the relationship between ewe age and its productivity, and ewe body measurements and its milk yield on grazing system. This study was conducted in the Jonggol Animal Science Teaching and Research Unit (JASTRU), Singasari Village, Bogor District, from June up to November 2007. As many 100 lactating ewes, on 1 to 4 years of age, were used in this study. Sheep were reared on grazing system from 9 a.m. to 4 p.m. and housed at night. The results showed that ewe age highly significant affected the body weight after lambing (p<0,01), milk yield (p<0,01), total birth weight (p<0,01) and total weaning weight (P<0,01) but did not significant for litter size. Breast circle, udder base circle, and udder height showed strong relationship in predicting 3 to 5 year ewe milk yield (p<0,01). The most productive ewes was 3 to 4 year ewes group.
Keyword: Sheep, udder size, milk yield, Weaning weight

Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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