Judul: Mange (kudis) pada kucing lokal di lingkungan kampus Institut Pertanian Bogor Dramaga
Abstrak: This study was conducted to identify the mite that cause mange to local stray cats found around Bogor Agricultural University, Dramaga. The skin scraping from seven cats with pruritus, alopecia, and hyperkeratosis were examined microscopically. Two of seven cats, two showed Otodectes sp. on their skin scraping examination. Otodectes were found on ear and head area. The mites can be found outside the ear, as the natural habitat for Otodectes, because cat use to shake and scratch on the exact area where the mites live which causes the mites being thrown away and stay on the other part of the body. Besides Otodectes, fungi and cat lice were also identified on the skin scraping examination. Fungi and lice infestation caused similar symptoms to mite infestation on cat skin. These two agents should be considered as the differential diagnoses to mange caused by mites on cat. Otodectes can be transmitted to human through direct contact so people awareness should be taken seriously about this zoonotic disease
Keyword: cat, mites, mange, Otodectes sp.

Judul: Parasit Saluran Pencernaan pada Kucing Liar di Lingkungan Kampus Institut Pertanian Bogor
Abstrak: The aim of this study was to identify gastrointestinal parasites of stray cat in Bogor Agricultural University. The total 30 fecal samples from stray cat were collected in various place in Bogor Agricultural University. Four samples were collected from stray cat in the male dormitory, 6 samples from lecturer residential, 4 samples from Blue Corner (BC) cafeteria, 6 samples from Yellow Corner (YC) cafeteria, 5 samples from Red Corner (RC) cafeteria and 5 samples from Veterinary Medicine Faculty. The presence of gastrointestinal parasite was observed using McMaster, sedimentation, and sporulation methods. The results showed that of the 30 samples, 25 samples were positive of gastrointestinal parasites with prevalence 83%. The identified parasites were Hookworm, Toxocara spp., Toxascaris leonina, and Isospora felis. Hookworm had the most prevalent (73%), followed by Toxocara spp. (53%), Toxascaris leonina (30%), and Isospora felis (23%). Toxocara spp. had the highest egg per gram feces (EPG) (3573±4497), followed by Hookworm (1417±1705), Toxascaris leoniina (989±623) and Isospora felis (471±339). The prevalence of Toxocara spp. was higher in juvenile stray cats than adult stray cats (P<0.05). The average of egg per gram feces of Toxocara spp. was also higher in juvenile stray cats than adult stray cats (P<0.05). Gastrointestinal parasites that were found in this study which potentially as zoonotic agent were Toxocara spp. and Hookworm.
Keyword: zoonoses., stray cat, prevalence, identification, gastrointestinal parasites

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.
Keyword: