Judul: Gastrointestinal  helminths  infection  in  reticulated  python (python  reticulatus  schneider  1810)  kept  as  exotic  pets
Abstrak: Exotic pets adalah jenis satwa liar yang dijadikan hewan kesayangan karena memiliki ciri unik dan menarik untuk dipelihara, diantaranya yaitu ular sanca (Python reticulatus). Perlu mempelajari kemungkinan adanya cacing parasitik zoonotik pada hewan kesayangan tersebut. Penelitian ini bertujuan untuk mengetahui jenis, persentase, dan derajat infeksi cacing saluran pencernaan ular sanca yang dijadikan sebagai exotic pets. Sebanyak 5 sampel tinja dikumpulkan dari lima ekor ular dengan pengulangan sebanyak 3 kali pengambilan. Analisis sampel tinja menggunakan modifikasi metode McMaster, flotasi sederhana, saringan bertingkat dan Kato-Katz. Hasil penelitian menunjukkan bahwa semua ular menderita kecacingan (100%). Adapun jenis dan persentase kecacingan adalah Ascaris 60%, Trichuris 60%, Strongylid 20%, dan Oxyuris 20%. Rata-rata jumlah telur dalam tiap gram tinja (TTGT) adalah Ascaris 832 TTGT dan Trichuris 514 TTGT., Exotic pets are wild animals kept as pets for having unique characteristics and attractive, among them are the reticulated python (Python reticulatus). The zoonotic gastrointestinal helminths in exotic pets might been found. The objective of this research was to observe gastrointestinal helminths, percentage infection, and infection intensity of reticulated python kept as exotic pets. A total of 5 individual faecal samples were collected for 3 times. Samples were examined using the modified of McMaster, simple flotation, stratified filter, and Kato-Katz method. The research result shows that all animals (100%) were infected with gastrointestinal helminths included Ascaris 60%, Trichuris 60%, Strongylid 20%, and Oxyuris 20%. The average of the number of egg per gram (EPG) of Ascaris and Trichuris were 832 EPG and 514 EPG, respectifely.
Keyword: cacing parasit, exotic pets, saluran pencernaan, ular sanca

Judul: Gastrointestinal Parasite in Bearded Dragon (Pogona vitticeps) in Cijeruk, Bogor
Abstrak: Kadal naga berjanggut merupakan reptil yang cukup populer sebagai peliharaan. Ada banyak faktor kejadian penyakit yang dapat menyerang kadal naga bejanggut. Lingkungan dan pakan sangat mempengaruhi tingkat ancaman penyakit, seperti infeksi parasit pada saluran gastrointestinal. Informasi data terkait infeksi parasit gastrointestinal pada kadal naga berjanggut di Indonesia masih terbatas, sehingga perlu adanya pemeriksaan penunjang untuk membantu diagnosa. Sebanyak 38 sampel feses dikoleksi dari kadal naga berjanggut di Cijeruk, Bogor. Sampel diperiksa dengan metode pengapungan sederhana, pewarnaan Ziehl Neelsen, dan perhitungan jumlah ookista dan telur parasit. Dari seluruh hasil, didapatkan semua sampel positif terinfeksi parasit gastrointestinal seperti Choleoeimeria sp., Isospora amphiboluri, Cryptosporidium spp., telur ascarid, dan telur oxyurid. Jumlah rata-rata ookista Choleoeimeria sp. dan Isospora amphiboluri adalah 8730 dan 51.281 ookista per gram feses. Jumlah rata-rata telur cacing per gram feses dari telur ascarid adalah 290 TTGT sedangkan telur oxyurid adalah 2325 telur per gram feses. Sebagian besar kadal naga berjanggut yang terinfeksi tidak menunjukkan gejala secara signifikan. Jumlah ookista dan telur cacing tiap gram feses menunjukkan hasil ringan dan tinggi., Bearded dragons are reptiles that are quite popular as pets. There are many factors of disease that can infect bearded dragons. The environment and feed affect the level of disease threat, such as parasitic infection in the gastrointestinal tract. Data information related to parasitic gastrointestinal infections in bearded dragons in Indonesia is still limited, so supporting examinations are necessary to help diagnose. A total of 38 fecal samples were collected from the bearded dragon in Cijeruk Bogor. Samples were examined by simple flotation method, Ziehl Neelsen staining, and counting the number of parasitic eggs. All samples were positive for gastrointestinal parasite infections such as Choleoeimeria sp., Isospora amphiboluri, Cryptosporidium spp., ascarid egg, and oxyurid egg. The average number of Choleoeimeria sp. and Isospora amphiboluri oocysts were 8730 and 51.281 oocysts per gram of feces. The average number of helminth eggs per gram was 290 and 2325 for ascarid and oxyurid, respectively. Most of the infected bearded dragons do not show significant clinical symptoms. The number of oocysts and worm eggs per gram of feces showed mild and high results.
Keyword: kadal naga berjanggut, parasit gastrointestinal, Pogona vitticeps

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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