Judul: Tingkah Laku Harian dan Pola Makan pada Domba Garut dengan Pemberian Pellet yang Mengandung Limbah Tauge dan Legum Indigofera sp.
Abstrak: Changes in the feed management can contribute to the change of behaviour that will impact on the productivity of livestock. The aim of this research was to study sheep behaviour as a result of giving bean sprouts waste pellet and Indigofera sp. pellet in the ration. This research used 6 garut lambs of 3 month old. There were two types experimental rations: (1) 30% of Indigofera sp.+70% concentrate and (2) 30% of bean sprout waste+70% concentrate. Parameter measured were sheep daily behaviour and eating behaviour. The data were recorded by a one zero sampling method and analyzed by Chi-square test. Data temperature and humidity obtained during the research were analyzed by Analysis of Varian (ANOVA). The result of temperature in the noon was significant higher than in the morning and afternoon, humidity in the morning was significant higher than in the noon and afternoon. Results showed that the daily behaviour exhibited by sheep with two types of ration (bean sprout waste and Indigofera sp.) were not significant. The activity of feed checking behaviour was significant, where the provision of Indigofera sp. pellet had greater frequency than bean sprout waste pellet, but did not cause stress to livestock. It is concluded that the two type of rations can be recommended to use in local sheep farm
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Judul: Respon Fisiologis dan Tingkah Laku Domba Garut dengan Pakan Limbah Tauge atau Kangkung Kering sebagai Pengganti Rumput
Abstrak: Garut sheep is commonly reared in West Java and usually fed with grass as the main feed and energy source. However, this grass has low quality and seasonally available, therefore should be an alternative feed such as mung bean sprout waste and dried kangkung. This research aimed to study sheep physiology and behavior as a response to diet and environment. This research used nine garut sheep (I0) with three treatments and replicates. The treatments were P0 (50% grass+50% consentrate), P1 (50% mung bean sprout waste+50% concentrate) and P2 (50% dried kangkung+50% concentrate). Physiological response data were analyzed by analysis of variance (ANOVA) and tested by Tukey post test method, while behavior frequency data were analyzed by Kruskal-Wallis test. Result showed that diet treatment did not affect (P>0.05) the heart and respiration rate, but significantly affected (P<0.05) on rectal temperature. All behaviors parameters were not significantly different (P>0.05) except for resting, grooming, licking strange object, and locomotion were higher in P1 than P0 and P2.
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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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