Judul: Infeksi Cacing pada Monyet Ekor Panjang (M. fascicularis) di Gunung Kapur Kecamatan Ciampea Kabupaten Bogor.
Abstrak: Konflik manusia-hewan yang terjadi antara masyarakat dan monyet ekor panjang di wilayah sekitar Gunung Kapur, Kecamatan Ciampea, Kabupaten Bogor berpotensi menyebarkan penyakit zoonosis termasuk kecacingan. Dengan demikian dilakukan Penelitian ini untuk mengetahui gambaran infeksi cacing pada monyet tersebut. Penelitian ini bersifat deskriptif dengan fokus pengamatan pada telur cacing yang terdapat pada sampel tinja monyet. Hasil pengamatan kualitatif menunjukkan terdapat tiga jenis telur cacing yang menginfeksi monyet yaitu telur cacing tipe Ascarid, Strongylid dan Schistosoma. Gambaran infeksi positif yang tinggi yaitu 76.67% terdiri atas infeksi tunggal (69.57%) dan infeksi campuran (30.43%). Derajat infeksi oleh cacing Ascarid dan Strongylid termasuk infeksi ringan. Ketiga cacing yang ditemukan dalam Penelitian ini diduga berpotensi zoonosis.
Keyword: Ascarid, cacing, monyet, schistosoma, strongylid

Judul: Infeksi Cacing Nematoda pada Saluran Pencernaan Monyet Ekor Panjang (Macaca fascicularis) di Matraman, Jakarta dan Taman Wisata Alam Telaga Warna, Bogor
Abstrak: Gastrointestinal nematode are common parasite found in warm-blooded animals, including Macaca fascicularis. Infection transmission of parasitic nematode in M. fascicularis can occur intraspesies and interspesies. The existence of macaque in homesite at Matraman, Jakarta allowing the parasite transmission from monkeys to humans, or vice versa. Free-living macaque’s in Nature Recreational Park of Telaga Warna are used as a benchmark to determine the prevalence of gastrointestinal nematode infection. Identification results of nematode eggs and larvae in monkeys on Matraman showed Strongyloides 66.67%, Trichostrongylus 58.33% Oesophagostomum 50% and hookworm 45.83%. Identification of nematode eggs and larvae in monkeys at Telaga Warna showed Strongyloides 14.29%, Oesophagostomum 19.05%, Trichostrongylus 19.05%, hookworm 14.29%, Trichuris 14.29% and Ascaris 9.52%. Total prevalence of monkeys in Matraman was at 80.95% and in Telaga Warna 52, 38%. Infection prevalence of parasitic nematode in M.fascicularis seattlement area are bigger than the natural habitat.
Keyword: Macaca fascicularis, nematode, gastrointestinal parasite

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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