Judul: Proyeksi Anomali Perilaku Stereotipe Monyet Ekor Panjang (Macaca fascicularis) Sitaan sebagai Hewan Model Neuropsikopatologi.
Abstrak: This study was dedicated to the development of the use and conservation policy of confiscated long-tailed macaques (Macaca fascicularis, cynomulgus macaques) in Jakarta Province. The macaques that have proven healthy physically and mentally will be returned to their natural habitat. However there were no behavioral assessments data and alternatives to utilize these mentally unhealthy macaques. For this purpose, we constructed behavioral assessments and explored the alternatives of animal use in scientific purposes. Among the 47 macaques observed using instantaneous or scan sampling recording method, three macaques were noted having stereotypical anomalies behavior such as, weaving, rocking, and hand-biting. The monkeys were housed into two types of housing that we considered as stable and unstable social housing. Based on literature studies, the suppression of stereotypical anomalies behavior in monkeys are almost impossible in unstable social housing and stereotypical anomalies behavior are observed in some human conditions which considered as neuropsychopathology cases. Due to this similarity, we concluded that Macaca fascicularis could develop as animal model for neuropsychopathology.
Keyword: Macaca fascicularis, stereotypical anomalies behaviour, neuropsychopathology

Judul: Studi Penampilan Monyet Ekor Panjang (Macaca fascicularis) Dio Unit Penangkaran Pusat Studi Satwa Primata Institut Pertanian Bogor
Abstrak: Penelitian ini dilakukan di Unit Penangkaran Pusat Studi Satwa Primata, Institut Pertanian Bogor. Pelaksanaan penelitian dimulai bulan Desember 1991 sampai bulan Maret 1992. Penelitian ini bertujuan untuk mempelajari perilaku monyet Ekor Panjang yang dikandangkan secara kelompok dan individu, dengan perlakuan pemberian pakan yang sama. Selain itu dilakukan pula pengukuran pada bagian-bagian tubuh, untuk memperoleh data ukuran anatomi monyet tersebut. Monyet yang digunakan dalam uenelitian ini 10 ekor yang dikandangkan secara individu dan 43 ekor dikandangkan secara kelompok.
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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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