Judul: Pengamatan fenotip dan pendugaan genotip warna, pola warna dan tipe bulu pada Hamster Syria (Mesocricetus auratus
Abstrak: Hamster Syria (Mesocricetus auratus) merupakan salah satu ternak yang dikenal sebagai hewan percobaan. Seiring dengan perkembangan zaman, saat ini hamster juga dikenal sebagai hewan peliharaan (pet animal). Penelitian ini bertujuan untuk mengamati dan menduga genotip warna, pola warna dan tipe bulu pada hamster jenis Syria (Mesocricetus auratus) dan faktor-faktor genetik yang mempengaruhi ragam warna dan bulu pada hamster. Selain itu, penelitian ini juga bertujuan untuk memberikan informasi dasar mengenai warna, pola warna, tipe bulu dan faktor-faktor genetik yang mempengaruhinya kepada penggemar hamster. Penelitian ini dilaksanakan di kandang Laboratorium Lapang Pemuliaan dan Genetika (LPG), Departemen Ilmu Produksi dan Teknologi Peternakan dan kandang uji Laboratorium Ternak Daging dan Kerja (LTDK), Departemen Ilmu Nutrisi dan Teknologi Pakan, Fakultas Petemakan, lnstitut Pertanian Bogor, Bogor. Penelitian lapang dilaksanakan dari bulan September bingga bulan November 2006; pengolahan data dilaksanakan selama satu bulan yaitu pada bulan Desember 2006; dengan menggunakan 63 ekor hamster yang terdiri atas 40 ekor jantan dan 23 ekor betina.
Keyword: hamster Syria (Mesocricetus auratus), genotip, pola wama

Judul: Pengamatan fenotip dan pendugaan genotip warna, pola warna dan tipe bulu pada Hamster Syria (Mesocricetus auratus)
Abstrak: The aim of this experiment were to observe and estimate the genotype of colour, coat pattern and coat typeof Syrian hamster (Mesocricetus auratus). This experiment has conducted from September until November 2006 at Laboratorium Lapang dan Pemuliaan Genetika (LPG) and Laboratorium Ternak Daging dan Kerja (LTDK), Faculty of Animal Science, Bogor Agricultural University. Sixty three hamster were used in this experiment consisting of 40 males and 23 females. The phenotype of coat colour, coat pattern and coat type of each hamster were listed on identification able that will be used to determine its genotype based on National Hamster Council Standard (2005).
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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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