Judul: Performa Domba Ekor Tipis dan Domba Garut dengan Pemberian Pakan Konsentrat dan Limbah Tauge
Abstrak: Generally performance of sheeps are influenced by genetic and environmen-tal factors. Feed is one of environmental factor, which can influence the growth. The aim of this study was to evaluate performance of thin tail sheep and garut sheep that gave field grass, concentrates and sprouts waste. This study used six thin tail sheep (16.27±0.86 kg, CV = 5.29%) and 6 garut sheeps (10.68±1.82 kg, CV = 17.04%) with two treatments of feed, there were field grass + concentrates (P0) and field grass + sprouts waste (P1). Weight gain, feed intake and feed efficiency were measured parameters. This study used CRD (completely randomized design) size 2x2 factorial with three replicates and the data were analyzed with analysis of variance (ANOVA). Daily weight gain and feed convertion was not affected to feed treatment and sheep breeds, but feed consumption was influenced by this factors. Dry mater intake of thin tail sheep (505.54±43.59 g/d) was higher than garut sheeps (316.45±45.37 g/d). Feed consumption of sheep to feed P1 (437.28±116.89 g/d) was higher than P0 (384.71±100.45 g/d). This was indicating that more sprouts waste palatabel ration and can be used as an alternative feed concentrates. Thin tail sheep has a better performance than garut sheeps, visible from ADG, feed intake and feed conversion.
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Judul: Performa Domba Garut dengan Pemberian Pakan Limbah Tauge dan Kangkung Kering Sebagai Hijauan Pengganti Rumput
Abstrak: The improvement of feed quality and raising management can increase the sheep performance. Nowadays, the availability of feed such as good quality grass is relatively expensive; therefore, there should be an alternative feed in place of grass. This research aimed to test the performance of male Garut sheep aged less than one year which was fed by bean sprout waste and dried kangkung as alternative feed. The raising time was two months. The feed treatment consisted of P0 (50% grass and 50% concentrate), (50% bean sprout waste and 50% concentrate), and (50% dried and 50% concentrate). The parameters observed were Daily Weight Gain, feed consumption, feed efficiency, and palatability. This study used complete by random design using feed factors. The data analysis used was ANOVA test, and if significantly influenced, Duncan test would be carried out. The research result showed that different kinds of feed did not have a significant effect on Daily Weight Gain and feed efficiency. However, it had a significant effect on feed consumption and palatability. Based on this research, it can be concluded that in general alternative feeds in form of bean sprout waste and dried kangkung can replace grass since the nutrition content is almost the same and generates similar Daily Weight Gain.
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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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