Judul: Studi Pakan dan Perilaku Makan Babi Hutan Sulawesi (Sus celebensis Muller dan Schlegel, 1843) di Suaka Margasatwa Tanjung Peropa, Sulawesi Tenggara
Abstrak: Sus celebensis is endemic to Sulawesi, Indonesia. S. celebensis has unique form, size and color. This animal is not protected by the law, not listed in the Red List Data Book (1996) IUCN and CITES. This case is one of the reasons that the hunt of S. celebensis can be done easily without sanction to the hunter. The research was conducted in Tanjung Peropa Wildlife Reserve, South East Sulawesi from Agustus to November 2006. Based on observation, Tanjung Peropa Wildlife Reserve is divided in three types habitat, used by S. celebensis including bamboo forest, riparian forest and lowland forest. Based on vegetation analysis, riparian forest is dominated by jolea (Cleistanthus sumatranus) for seeding, mehere (Drypetes cf. gfobosa) in sapling level, kasumeeto (Diospyros malabarica) in pole level, weewu (Planchonia valida) in tree level, and hao ani (Spatolobus ferrugineus) in under plant. Plant which most dominate in lowland forest is holea (Cleistanthus sumatranus) in seedling, sapling and pole level kapu gone (ficus sp) in tree level and tokoalinda (Elastotema rostratum) in under plant.
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Judul: Karakteristik Habitat dan Jenis Pakan Kuskus Beruang (Ailurops ursinus) di Suaka Margasatwa Tanjung Peropa, Sulawesi Tenggara
Abstrak: Kuskus beruang (Ailurops ursinus) yang berstatus vulnerable dalam IUCN Redlist, merupakan salah satu satwa endemik dilindungi yang hidup di hutan dataran rendah Sulawesi. Penelitian bertujuan untuk mengidentifikasi karakteristik habitat, jenis pakan, dan aktivitas harian kuskus beruang di Suaka Margasatwa Tanjung Peropa, Sulawesi Tenggara. Penelitian dilaksanakan pada bulan Februari – Maret 2017. Karakteristik habitat diidentifikasi dengan menggunakan analisis vegetasi, jenis pakan diidentifikasi dengan menggunakan pengamatan langsung dan tidak langsung, serta aktivitas harian diidentifikasi dengan menggunakan adlibitum sampling. Indeks nilai penting tertinggi tingkat pohon pada jalur Mobula dan jalur Mata Air berturut-turut yaitu Pisonia umbellifera (28.33%) dan Chisocheton ceramicus (44.72%). Terdapat 80 jenis tumbuhan yang tercatat sebagai potensi pakan kuskus beruang. Persentase tertinggi bagian tumbuhan yang dimakan oleh kuskus beruang yaitu pucuk (36.19%) dan daun muda (36.19%). Aktivitas harian kuskus beruang yaitu beristirahat (89.05%), berpindah (5.83%), mencari makan (2,71%), dan makan (2,41%). Kuskus beruang lebih sering memanfaatkan vegetasi dengan strata C dalam melakukan aktivitas hariannya.
Keyword: aktivitas harian, karakteristik habitat, kuskus beruang, pakan, sulawesi

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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