Judul: Karakteristik morfometri ukuran dan bentuk tubuh kmabing peranakn etawah pada kelompok umur di koperas daya mitra primata
Abstrak: The present experiment was conducted to discrimnate the body size and body shape of the Etawah grade goats in different group of age at Daya Mitra Primata (DMP) Cooperative. Forty-seven of Etawah grade goats at DMP Cooperative were used. All Etawah grade goats was grouped according to sex and age. It were consisted of 32 female goats (five heads of I0, six head of I1, seven heads of I2, eleven heads of I3 and three heads of I4) adan 15 female goats (six head of I0, five heads of I1 adn four head of I4).
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Judul: Ukuran dan Bentuk Kepala Kambing Peranakan Etawah (PE) Betina Dewasa di Tiga Peternakan.
Abstrak: This study aims to determine the size, shape and characteristics of head on goats in the Cordero, Pelaihari and Doa Anak Yatim Farms. The size and shape of the head is used to distinguish between groups morphometric characteristics of Etawah Grade Does. The variables of head measure is not noticed by the breeder, so goats adapt and have a distinctive appearance. The results of this study can be used as basic morphometric data of Etawah Grade does in Indonesia, and for the conservation. The variables measured were akrokranion-prosthion, basion-prosthion, the length of the lower jaw, head height, tuber facial left-right, nasion-rhinion, entorbitale left-right, euryon left-right dan supraorbitale left-right. The study used 90 data. The data analysis using descriptive, T2-Hotelling statistics and Principal Component Analysis were used to create clusters diagram and dendogram. Akrokranion-prosthion and basion-prosthion became discriminators of Etawah grade does head size in all three farms. Discriminatots of Etawah Grade does head shape on Cordero farm was nasion-rhinion, Pelaihari was head hight and supraorbitale, DAY Farm was euryon left-right. The data of linear measurement classified separated each other. Morphometric data of Etawah Grade does head on Cordero and DAY Farm were different class with Pelaihari.
Keyword: cluster, dendogram, Etawah Grade does, head morphometri

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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