Judul: Performa ulat tepung (Tenebrio molitor L.) dengan berbagai rasio pemberian daun ginseng (Talinum paniculatum G.) dan daun singkong (Manihot esculenta C.)
Abstrak: yellow mealworms is the larva of Tenebrio molitor L beetle. Now a days, yellow mealworm are reared because of it economic value. Yellow mealworm can be used for diets of birds, fish, and reptiles. The research was done on July 18m up to August 2 9 2005 at Non Ruminants and Prosppective Animals Division,Department of Animal Production and Technology, Faculty of Animal Scien, Bogor Agricultural University.
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Judul: The Performances of the Meal Worms (Tenebrio molitor) Kept with a Different Density
Abstrak: Ulat hongkong (Tenebrio molitor) merupakan komoditas ternak yang termasuk ke dalam ternak prospektif. Pemeliharaan ulat hongkong harus dilakukan dengan tepat sehingga menghasilkan produksi yang optimal. Kepadatan kotak kandang pemeliharaan merupakan faktor yang berpengaruh pada saat pemeliharaan dalam meningkatkan produksi ulat hongkong. Penelitian ini bertujuan menganalisis performa ulat hongkong yang dipelihara dengan tingkat kepadatan berbeda. Penelitian ini menggunakan metode rancangan acak lengkap (RAL) dengan empat perlakuan dan tiga ulangan untuk setiap perlakuan. Peubah yang diamati adalah panjang badan, lebar badan, bobot kitin, bobot individu, bobot hidup total, dan mortalitas. Hasil penelitian menunjukkan tingkat kepadatan berbeda nyata (P<0,05) terhadap performa ulat hongkong. Tingkat kepadatan sebanyak 500 gram pada kotak kandang pemeliharaan memberikan hasil yang paling baik, yaitu pada rataan panjang badan, rataan bobot hidup total, rataan mortalitas, dan rataan bobot kitin., Meal worms (Tenebrio molitor) are chategorized as prospective animals. The farming of the meal worms must be done correctly to achieve their optimal production. The density of the during farming box is a factor that influences the maintenance process in increasing meal worm production. This study aims to analyze the performance of meal worms raised at different density levels. The study used a completely randomized design (RAL) with four treatments and three replications for each treatment. The observed variables were body length, body width, chitin weight, individual weight, total live weight, and mortality. The results of the study showed significantly different density levels (P<0.05) on the performance of meal worms. A density level of 500 grams in the farming box yielded the best results, particularly in average body length, average total live weight, average mortality, and average chitin weight.
Keyword: Density, Meal Worms, Performance

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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