Judul: Kecacingan pada Kukang Sumatera (Nycticebus coucang) di Pusat Rehabilitasi Satwa Primata Yayasan International Animal Rescue Indonesia (YIARI)
Abstrak: According to the International Union Conservation of Nature and natural Resources (IUCN), Sumateran slow loris (Nycticebus coucang) is protected primates which was vulnerable animal. Their population in wildlife decreased cause hunting for trade and destructive habitat. Helminthiasis can caused dead regularly and its so identification of this disease needed. The study was conducted to know prevalence of gastrointestinal helminth infection of slow loris (Nycticebus coucang) in The Center of Primate Rehabilitation of International Animal Rescue Indonesia (YIARI). Total of 13 fecal sampel from captive group of Nycticebus coucang were collected for 6 days and analysed from February-May 2014 by using McMaster, flotation and Baermann technique to identified morphology of the eggs. All fecal sampel was examined based on its fecal pool. Out of 13 fecal sampel examined, all of sampel (100%) was infected with five types of helminth Ascaris (84,61%), Hymenolepis (76,92%), Strongylid (61,54%), Oxyuris (15,38%) and Trichuris (7,69%). The average number of egg per gram (EPG) was 11-1555.
Keyword: Bogor Agricultural University (IPB), slow loris, prevalence, parasite, Nycticebus coucang, helminth, fecal

Judul: Cacing parasitik pada ungko (Hylobates agilis F.Cuvier 1821) dan siamang (Symphalangus syndactylus Raffles 1821) di Taman Rekreasi Margasatwa Serulingmas Banjarnegara
Abstrak: Agile gibbon (Hylobates agilis F. Cuvier 1821) and siamang (Symphalangus syndactylus Raffles 1821) are Indonesian endemic species. Aim of the study to determine the existence and the type of parasitic worms that infected agile gibbon and siamang at Serulingmas Zoological Garden, Banjarnegara. From Juli 2009 to February 2010, feces from three heads of agile gibbon and three heads of siamang was collected each week. All of samples were examined with quantitative and qualitative examination. Identification is achieved by the use of faecal cultures. The result showed that parasitic worms of agile gibbon were Trichostrongylus spp. and Strongyloides spp. and parasitic worms of siamang were Trichuris spp., Trichostrongylus spp., Strongyloides spp., and Cooperia spp. The result of quantitative examination showed that degree of infection by parasitic worms in agile gibbon and siamang belonging to low infection.
Keyword: Agile gibbon, Siamang, Feces, Parasitic worm, Trichuris spp., Trichostrongylus spp., Strongyloides spp., Cooperia spp., Bogor Agricultural University

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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