Judul: Peran Pemberian Ekstrak Tempe terhadap Organ Ovarium dan Uterus Tikus Betina Prapubertas
Abstrak: This research was conducted to study the potential of tempe phytoestrogen to the reproduction performance in female rats (Rattus norvergicus). There were 18 of 21-days old of female rats were divided into two groups, which were control group without given tempe extract and treatment group that has been given the tempe extract with a concentration of 0.25 gr everyday at the the age of 21-days old until 48 days-old. The female rats were sacrificed at the age of 28th, 42nd and 56th days-old to collect the samples of blood, ovarium and uterus. Parameter measured were the rate of estrogen hormone, wet and dry weight, water content, total of DNA and total of RNA. Data were analysed using Independent Samples T-Test method with 95% confidence interval. Result showed the increasing of wet and dry weight of ovarium and uterus in treatment group at the age of 42 days but there was no influence on the total of DNA and RNA of organs.
Keyword: estrogen, ovarium, phytoestrogen, total of DNA and RNA, uterus

Judul: Kinerja Organ Ovarium dan Uterus Umur Dewasa Setelah Pemberian Ekstrak Tempe Saat Usia Lepas Sapih.
Abstrak: Tempe is soybean product that contains phytoestrogen. This research was aimed to know the influence of tempe extract on reproduction performance of female rats. Twelve 21-days old female rats were divided into three groups, which were control group and two treatment group, which were given tempe extract 0.005 g/g body weight and 0.01 g/g body everyday for 28 days. Parameters observed were wet and dry weight, total DNA and total RNA of ovaries and uterus which were taken on 224 days old. Data were analyzed using ANOVA method and Duncan test with 95% confidence interval (a=0.05). Result showed that treatment group given tempe extract 0.005 g/g body weight and 0.01 g/g body weightincrease wet weight and total RNA of ovarium and uterus.
Keyword: tempe etanol extract, phytoestrogen, ovarium, uterus, total of DNA and RNA

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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