Judul: Sifat Karkas dan Non-Karkas Sapi Silangan Lokal pada Berbagai Kondisi Perlemakan Tubuh
Abstrak: The study was aimed to examining the effect of body condition score (BCS) of local crossbreed cattle on carcass and non-carcass characteristics. This study used 73 bulls of local crossbreed cattle slaughter on state abbatoar at West Java, Central Java, and East Java. The slaughter weight, carcass and non-carcass weights at different BCS were recorded. The collected data were analyzed by analysis of variance (ANOVA) using general linear model (GLM) procedure. The differences between BCS were tested using Duncan multiple range test. Result showed that increased of BCS from 2 to 4, slaughter weight and carcass weight were increased (P<0.05), except carcasses dressing percentage. The non-carcas weight obviously increased with increasing body condition score (BCS). However significant between BCS differences in non-carcas characteristics occurred only in percentages of offal and tail.
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Judul: Profil Body Condition Score (BCS) Sapi Perah di Wilayah Koperasi Peternakan Sapi Bandung Utara (KPSBU) Lembang (Studi Kasus)
Abstrak: Body Conditon Score (BCS) is a method to define or interpret the livestock’s weight and its physiological state. This case study was conducted in Sukajaya which belongs to the area of North Bandung Dairy Farmer Cooperation by observing the condition of dairy cattle types Friesian Holstein. A hundred lavtation of dairy cattle was used in this case study.The scoring was based on 1(emaciated) to 5(very fat) by the interval degree of 0.25. In Sukajaya farming society, the body condition score at the early fase of lactation was 3.106+0.354, then decrease at the peak milk fase 2.981+0.268. This score will increase gradually on the next months. The decreasing of BCS happened due to the high milk production which was not accompanied with enough feed, therefore the body fat reserves which were deposited on the observed parts decreased. This body fat was used for another energy sources except from feed. Generally The body condition score was 3.500+0.315 for dry off period in Sukajaya.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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