Judul: Keragaman tingkah laku beberapa bangsa domba yang dikandangkan dan pemanfaatannya untuk peningkatan produksi
Abstrak: Potential utilization behavior to improve of sheep productivity was studied in four parts of the study. Three topics of research conducted to study opportunity of behavior to differentiate and estimation of genetic distances between five sheep breeds, indirect selection on body weight gain and productivity of ewe and identification of SNP DNA markers for aggressiveness. Topic of recent research is to find a method in behavioral research which easier, more concise and accurate and can represent overall of sheep behavior. Five of sheep breeds, i.e. Barbados Black belly Cross sheep (BC), Garut Composite (KG), Garut Local (LG), Sumatra Composite (KS) and St. Cross Croix (SC) used in this study. A set of CCTV equipment used to observe a sheep behavior and recorded in a video file. Canonical discriminant analysis and hierarchical clustering according to the Average Linkage method and the dendogram performed in the study of genetic differentiation and distance estimation. Meanwhile, multiple correspondence analysis (MCA) is performed for qualitative variables. Arena tests performed to determine temperament of sheep and its relationship with growth rate and ewe productivity. Analysis of variance to behavioral variables and blood serotonin concentration and analysis of DNA polymorphism exon 8 of MAOA gene were performed between aggressive and not aggressive group ram. Paired t test and correlation analysis to estimate a correlation between partial data and the whole data were performed to fourth study. The results showed that body measurements of sheep can be utilized to differentiate and estimate a genetic distance between the sheep breeds accurately. Sound characteristics of sheep has a great opportunity to be utilized in the differentiation and estimation of genetic distance between the sheep breeds but need improvement in the sound data collection methods. Meanwhile, the utilization of behavior data to differentiate and estimate of genetic distance between the sheep breeds was less accurate. Differentiator variables for body sizes was tail width, horn base circumference, long horns, long tail, body length, and skull width, while differentiator variables for sound call characteristics was the third quartile frequencies, middle frequencies, maximum frequencies and time of the first quartile frequencies. Post weaning sheep which more docile to the observer has a daily gain higher. Ewe which have more bleats have total weaning weight and lamb survival higher than those of ewe which less bleats when separated from their lamb. Aggressive and nonaggressive sheep have the same behavior, though aggressive sheep had higher blood serotonin concentrations compared to the group of non aggressive sheep. In this study, aggressive behavior in sheep was not associated with a mutation in exon 8 of MAOA gene. The use of 6 hours partial data was the best partial data to predict all of sheep behavior accurately.
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Judul: Studi keragaman fenotipik dan pendugaan jarak genetik antar domba lokal di Indonesia
Abstrak: This research was to study the morphological characteristic and estimating the genetic distance between local sheep in Indonesia with discriminant and canonical analyses. Observed sheep breeds were thirrtailed sheep from Jonggol (Bogor), Gamt sheep h m Ma~gawati (West Java) and fat-tailed sheq, h m Madura Island, Lndramayu (Central Java), Sumbawa Island, Rote Island, Kisar Island (Maluku) and Donggala Island. The number of sheep were randomly collected h m local farmers for 533 heads and h m unit of ranch was 285 heads. Body dimension studied were body weight, body length, wither height, chest width, chest depth, chest circumference, skull length, skull width, skull height, tail lenght, tail width, ear length and ear width.
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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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