Judul: Postpartum estrus of Sumatra x St. Croix x Barbados Blackbelly and Sumatra x Barbados Blackbelly Cross Bred Sheep.
Abstrak: Sheep are mainly raised in rural society because of their biological characteristic which support optimum production such as ability to reproduce throughout the year, short pregnancy period (150 days) and high litters. Postpartum estrus period is one of factors influenzing lambing interval beside pregnancy and breeding management. This research was conducted from October 9, 1999 -March 7, 2000 at Research Institute for Animal Production Experiment Station, West Cilebut, kecamatan Sukaraja, Bogor. Twenty four cross bred of Sumatra x Barbados Blackbelly (BC) sheep and 42 cross bred of Sumatra x St. Croix x Barbados Blackbelly sheep (M) were used for the study. Observed Variables were the period of postpartum estrus and other information like ewes age, live weight of ewes at lambing and estrus, litter size, total birth weight, and total feed consumption of ewes. Data were analyzed by General Linear Model according to SAS 1986.
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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: Pengaruh Penambahan Gurney Flap pada Profil Aerodinamik NACA 2412
Abstrak: Airfoil NACA adalah bentuk dari airfoil pesawat yang dikembangkan oleh National Advisory Committee for Aeronautics (NACA). Tujuan dari penelitian ini adalah untuk mengetahui tekanan aliran fluida terhadap airfoil setelah penambahan gurney flap. Gurney flap dapat menurunkan tekanan fluida pada airfoil. Dalam penelitian ini digunakan tiga variasi sudut dari gurney flap terhadap airfoil. Variasi sudut gurney flap disimulasikan menggunakan perangkat lunak berupa Autodesk Inventor untuk mendesain airfoil dan Gurney flap, serta CFD (Computational Fluid Dynamics) untuk simulasi aliran fluida. Dari hasil simulasi diketahui bahwa penambahaan gurney flap menyebabkan penurunan tekanan aliran fluida pada bagian bawah airfoil. Penambahan Gurney flap memberikan gaya angkat yang besar pada airfoil dengan sudut gurney flap 45o dan aliran fluida pada sudut ini adalah turbulen. untuk gurney flap dengan sudut -45o adalah jenis aliran udara yang turbulensi juga, akan tetapi tidak memberikan gaya angkat yang maksimal. Gurney flap dengan sudut 90o memiliki jenis aliran fluida yang turbulen digunakan saat pesawat terbang rendah dan mendarat.
Keyword: Airfoil, NACA, gurney flap, Autodesk Inventor, CFD