Judul: Protein Cacing Tanah Sebagai Sumber Protein Alternatif dari Pengolahan Limbah Ruminansia Besar.
Abstrak: Population growth in Indonesia is very rapidly led to increased demand for animal protein. Hence the need for alternative protein sources to meet the needs of the human protein. Earthworms contain high protein so it can be used as an alternative protein source. Livestock waste which if not handled properly can damage the environment. Therefore, the waste from livestock can be used as feed worms. The purpose of this study was to determine the potential of earthworms as a source of alternative porotein by utilizing the processing of livestock waste as feed worms. This study was done in Raya Dramaga street Km 7, Village Marga Jaya, District Dramaga, Bogor regency. The data used in this research is secondary data which include statistical data of the number of cattle in Indonesian, census, production and consumption of livestock products. Variables measured is the population of worms, the worms feed sufficiency, protein production livestock products, and protein consumption of livestock products. The results showed that the worms can be used as an alternative source of protein and livestock waste can meet the needs of feed worm.
Keyword: earthworm, ruminant waste, protein

Judul: Pertambahan bobot badan dan mortalitas cacing tanah Lumbricus rubellus yang mendapat pakan sisa makanan warung
Abstrak: Earthworm was detrivor animal could solve odor problem of organic waste, decreasing the organic waste and it's metabolic worth for fertilizer. The aims of this study were obtained earthworm's body weight gain and mortality in different level of treatment. The study was held from September 20th until 8th December 2005 at Non Ruminants and Prospective Animal Division, Department of Animal Production and Technology, Faculty of Animal Science, Bogor Agricultural University. The experiment used Complete Randomized Design in four feeding level treatments consists of 1; 1.25; 1.5; 1.75 body weight earthworms. Each treatment had five replications which contained 2.3 grams earthworm aged two weeks old, length 3.25 cm. Observed variables were body weight, body weight gain and mortality. Data were analyze using ANOVA and tested using Polynomial Orthogonal to examine the differences among treatments. The results showed that feed levels affected the body weight gain but not the earthworm's mortality. Elevation feed increased body weight gain of earthworm but the treatment could accumulation of oil on bedding. Oil accumulation in bedding appear as uncomforted environtment to earthworms, thus the body weight gain reduce until negative value. Food restaurant waste can be used as earthwarm's meal but the bedding must be in large supply. Keywords: Lurnbricus rubellus, food restaurant waste, body weight gain, mortality
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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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