Judul: Kondisi Anatomis Gigi dari Tulang Kepala Kuda di Laboratorium Anatomi Fakultas Kedokteran Hewan Institut Pertanian Bogor
Abstrak: Penelitian ini bertujuan mengetahui struktur dan susunan gigi normal dan abnormal pada preparat kepala kuda di Laboratorium Anatomi Fakultas Kedokteran Hewan Institut Pertanian Bogor. Penelitian dilakukan dengan mengamati struktur gigi rahang atas dan bawah dari 8 kepala kuda. Hasil pengamatan anatomis gigi kemudian dikategorikan berdasar berbagai literatur. Dari basil penelitian diketahui bahwa kisaran umur preparat kuda antara 1- 2 tahun dan 10 - 25 tahun. Kelainan bentuk gigi terlihat pada kuda umur tua. Kelainan bentuk gigi terdiri dari diagonal bite, ventral curvature, uneven teeth, diastema, stepped molar, wave, ramp, accentuated transverse ridges, enamel points, dan sheared molar table.
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Judul: Studi abnormalitas gigi pada kuda delman di Kota Bogor
Abstrak: Delman horse is one of the working animal that commonly used by the Bogor citizen as today tour transportation. Research on delman horse has not been done, including the dental health. The aim of this study is to identify and describe dental abnormalities on delman horses in Bogor city. This research was conducted in two stage, which are filled the questionnaires and interviewed with coachmen and also examined delman horse’s teeth. The results showed that horses have 100% bit sore, 80% sharp enamel points, and 30% mouth laceration. Incisors abnormalities were 20% overjet and 10% underjet. Canine abnormalities were 30% canines cutted and 10% canine periodontitis. Wolf teeth owned by 50% of examined horse. Cheek teeth abnormalities were 10% stepped mouth, 30% wave mouth, and 60% cupped out. Hooks formed 10% at the rostral cheek teeth, 30% caudal, and 30% rostrocaudal. Dental abnormalities in delman horses mostly considered as minor and closely related to the bit size, horse’s age, feed, others dental abnormalities, human manipulation, and genetic.
Keyword: delman horse, Bogor City, dental exam, dental abnormalities

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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