Judul: Vitamin E Supplementation in Diets on The Percentage of Carcasses and Non Carcasses, and Meat Bone Ratio in IPB-D3
Abstrak: Tujuan penelitian ini adalah untuk mengevaluasi suplementasi vitamin E dalam ransum terhadap persentase karkas, non karkas, serta rasio daging tulang ayam IPB-D3 dalam ransum yang berbeda. Penelitian ini menggunakan 160 ekor ayam IPB-D3 yang diberi ransum perlakuan dari umur 5 sampai 12 minggu. Penelitian ini menggunakan rancangan acak lengkap (RAL) pola faktorial dengan dua faktor yaitu jenis ransum (SNI dan SNI+10%) dan suplementasi vitamin E (0 ppm dan 200 ppm). Perlakuan ransum yang diberikan adalah sebanyak 4, yaitu (P1) ransum SNI, (P2) ransum SNI+10%, (P3) ransum SNI+vitamin E 200 ppm, dan (P4) ransum SNI+10%+vitamin E 200ppm. Hasil penelitian menunjukkan bahwa jenis ransum SNI+10% meningkatkan persentase bobot karkas, tetapi menurunkan panjang relatif bobot duodenum, persentase jejunum, panjang relatif jejunum, panjang relatif ileum, dan persentase sekum. Kesimpulan penelitian ini adalah jenis ransum dengan kandungan 10% lebih besar dari SNI ayam kampung mampu meningkatkan bobot karkas ayam IPB-D3., The purpose of this study was to evaluate vitamin E supplementation in the diet to the percentage of carcass, non carcass, and meat bone ratio of IPB-D3 chicken in different diets. This study used 160 IPB-D3 chickens that were given treatment diets from 5 to 12 weeks of age. This study used a factorial RAL pattern with two factors, namely the type of diet (SNI and SNI + 10%) and vitamin E supplementation (0 ppm and 200 ppm). The diets treatments given were 4, namely (P1) diet SNI, (P2) diet SNI+10%, (P3) diet SNI+vitamin E 200 ppm, and (P4) diet SNI+10%+vitamin E 200ppm. The results of the analysis showed that the type of diet SNI+10% increased the percentage of carcass weight, but decreased the relative length of the duodenum, the percentage of the jejunum, the relative length of the jejunum, the relative length of the ileum, and the percentage of the cecum. The type of SNI diet for native chickens with nutrients above 10% was able to increase the carcass weight of IPB-D3 chickens. The type of SNI diets for native chickens with nutrients above 10% was able to increase the carcass weight of IPB-D3 chickens.
Keyword: carcass percentage, IPB-D3 chicken, meat bone ratio, non carcass percentage, vitamin E.

Judul: Zn Supplementation in Diets on the Carcass and Non Carcass Percentage, and Meat-Bone Ratio in IPB-D3 Chicken
Abstrak: Percobaan ini dirancang untuk mengevaluasi suplementasi Zn terhadap persentase karkas, persentase non karkas, serta rasio daging-tulang ayam IPB-D3 dalam ransum yang berbeda. Analisis data menggunakan RAL pola faktorial dengan dua faktor yaitu jenis ransum (SNI dan SNI+10%) dan dosis Zn (0 ppm dan 60 ppm). Sebanyak 160 ayam IPB-D3 digunakan sebagai objek penelitian dan diberikan 4 perlakuan ransum, yaitu (P1) ransum SNI, (P2) ransum SNI+10%, (P3) ransum SNI+Zn 60 ppm, dan (P4) ransum SNI+10%+Zn 60 ppm. Peubah yang diamati pada penelitian ini adalah persentase karkas dan potongan karkas, persentase non karkas, serta rasio daging-tulang pada dada, paha atas, dan paha bawah. Interaksi pemberian jenis ransum yang mengandung nutrien diatas 10% SNI dan suplementasi Zn 60 ppm meningkatkan persentase sayap tetapi menurunkan persentase jejunum. Jenis ransum SNI+10% mampu meningkatkan persentase karkas, tetapi menurunkan persentase duodenum, sekum, kolon, serta panjang relatif pada duodenum, jejunum, ileum, sekum, dan kolon. Simpulan penelitian ini adalah perlakuan yang terbaik terdapat pada ransum yang mengandung nutrien diatas 10% SNI tanpa suplementasi Zn. Ransum yang mengandung nutrien lebih besar 10% dari SNI ayam kampung memberikan respon yang lebih baik terhadap persentase dan potongan karkas, serta persentase non karkas ayam IPB-D3., This experiment was designed to evaluate Zn supplementation on the carcass percentage, non-carcass percentage, and meat-bone ratio of IPB-D3 chicken in different diet. Data analysis used a factorial RAL pattern with two factors, namely diet type (SNI and SNI+10%) and Zn dose (0 ppm and 60 ppm). A total of 160 IPB-D3 chickens were used as research objects and were given 4 diet treatment, namely (P1) diet SNI+Zn 0 ppm, (P2) diet SNI+10%+Zn 0 ppm, (P3) diet SNI+Zn 60 ppm, and (P4) diet SNI+10%+Zn 60 ppm. The variables observed in this study were the carcass percentage and carcass pieces, non-carcass percentage, and meat-bone ratio in breast, upper thigh, and lower thigh. The interaction of giving the type of diet containing nutrients above 10% SNI and Zn supplementation 60 ppm increased wing percentage but decreased jejunum percentage. The type diet SNI+10% was able to increase the carcass percentage, but decrease the percentage of duodenum, cecum, colon, and the relative length of the duodenum, jejunum, ileum, cecum, and colon. The conclusion of this study is the best treatment with diet containing nutrients above 10% SNI without Zn supplementation. The diet containing 10% more nutrients than the SNI native chicken gave a better response to the carcass percentage and carcass pieces, as well as the non carcass percentage in IPB-D3 chicken.
Keyword: ayam IPB-D3, persentase karkas, persentase non karkas, rasio daging tulang, Zn, IPB-D3 chicken, carcass percentage, non carcass percentage, meat-bone ratio, zinc

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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