Judul: Produktivitas Puyuh Petelur Coturnix coturnix japonica yang diberi Tepung Daun Jati (Tectona grandis linn. f.) dalam Ransum.
Abstrak: This experiment was held at Slamet Quail Farm in Sukabumi, and Poultry Nutrition Laboratory, Faculty of Animal Science, Bogor Agricultural University, Bogor, from June to September, 2013. This research aimed to evaluated the effects of tecton leaf as addition in diet of quail. Laying quails aged 6 weeks and 180 heads had body weight average about 165.11±10.53 g were allowed in completely randomized design, that divided into four treatments with three replications. The treatments were classified into : basal diet (P0), basal diet + 3% tecton leaf meal (P1), basal diet + 6% tecton leaf meal (P2), basal diet + 9% tecton leaf meal (P3). Variables were feed intake, egg production, egg weight, egg mass, feed conversion ration and mortatilty. The result of this research showed that tecton leaf meal did not significantly affect on egg production, egg weight, egg mass, and feed conversion, but significantly decreased on feed intake (P<0.05). There was no mortality during this experiment. The addition of tecton leaf meal in ration decreased value of income overfeed cost. Tecton leaf meal supplementation was increased feed cost.
Keyword: tecton leaf meal, quail, income overfeed cost, egg production

Judul: Penggunaan Tepung Daun Jati (Tectona grandiss. Linn. f.) dalam Ransum Terhadap Kualitas Telur Puyuh Coturnix coturnix japonica.
Abstrak: Quail eggs are poultry products that can be used as an alternative of protein source by animal. Therefore, it was necessary to find a methode to improve production and the quality of quail eggs. This research was aimed to evaluate levels of utilization Tectona grandiss Linn. f. (tecton) leaves meal in ration to the quality of quail eggs (Coturnix coturnix japonica). The experiment used 180 head of quails aged 40 days and the quails were grouped according to the feeding treatments into four treatments and three replicates. The treatments were R0 (control), R1 (control with 3% tecton leaves meal), R2 (control with 6% tecton leaves meal), and R3 (control with 9% tecton leaves meal). The experiment was conducted using Completely Randomized Design (CRD). The parameters observed were egg quality. The result of this research showed that egg weight, albumen weight, yolk weight, egg shell weight, and haugh unit were significant difference (P>0.05), but shell thickness, and yolk color were not significant. Utilization of Tectona grandis Linn. f. leaves meal up to 6% can increased the quality of quails egg.
Keyword: Tectona grandiss Linn. f. leaves meal., egg quality, egg quail

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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