Judul: Infeksi cacing gastrointestinal pada Macan Tutul Jawa (Panthera pardus melas) di Pusat Penyelamatan Satwa Cikananga dan Situgunung Park
Abstrak: Javan leopard (Panthera pardus melas Cuvier, 1809) is an endemic species of Indonesia that can only be found in Java island. This species is stated as critically endangered, so that the conservation act is needed to save Javan leopard. The objective of this research is to identify and determine the infection and the intensity of the gastrointestinal helminths in Javan leopard from Pusat Penyelamatan Satwa Cikananga (PPSC) and Situgunung Park, Taman Nasional Gunung Gede Pangrango (TNGGP). Four individual stool samples were collected from PPSC on Januari-Februari 2014 and 3 stool samples were collected from Situgunung Park, TNGGP on May 2013 and March-June 2014. All samples were examined using modified McMaster, flotation, and modified sedimentation techniques. The result showed that all samples were infected by gastro-intestine helminths. The identified helminths were strongylids (85,71%), trichurid and ascarids (57,14%) and Strongyloides (28,57%). The range of eggs per gram (EPG) varied from <50-8825 EPG. The highest count were found in strongylid (<50- 8825 EPG) in PPSC, followed by trichurid (<50-3750 EPG) in PPSC and Strongyloides (700-1100 EPG) in SGP. The lowest count was ascarid (<50 EPG) which was found in PPSC and SGP.
Keyword: Bogor Agricultural University, gastrointestinal helminths, Javan leopard, EPG

Judul: Infeksi Cacing Gastrointestinal pada Harimau Sumatera (Panthera tigris sumatrae) di Taman Margasatwa Ragunan
Abstrak: The aim of this research was conducted to investigate the prevalence values and the intensity of infection of gastrointestinal helminths from Sumatran Tigers (Panthera tigris sumatrae) in Ragunan Zoo. A total of 26 individual stool samples were collected from 26 tigers at 4 areas. These samples were examined using modified McMaster, simple floatation, and modified sedimentation techniques based on sex and age group. The result showed that the identified helminth eggs were Toxocara cati and Toxascaris leonina (Ascarid) and also Ancylostoma tubaeforme (Strongylid). There were 25 (96%) of the examined animals infected by Ascarid (96%) and Strongylid (68%). All male tigers (100%) were infected by Ascarid and 64% were infected by Strongylid. There were 83% female tigers infected by Ascarid and 67% infected by Strongylid. The prevalence of the age group of <5, 5-10, and >10 years old, consecutively indicated that 100%, 91%, and 83% were infected by Ascarid and 67%, 64%, and 67% were infected by Strongylid. The highest intensity of Ascarid infection (10625 EPG) was found in females while the highest intensity of Strongylid infection (3650 EPG) was found in males. Those intensity of infection were found in the age group of <5 years old.
Keyword: Bogor Agricultural University (IPB), Sumatran tiger, Ragunan zoo, gastrointestinal helminths

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: