Judul: Study of small mammals wildlife trade in dki jakarta
Abstrak: Mamalia kecil adalah mamalia yang berat badan dewasa 2 g hingga 5 kg yang memiliki daya tarik tersendiri bagi peminatnya untuk dijadikan sebagai satwa peliharaan. Penelitian dilakukan pada bulan Mei-Juni 2014 di pasar dan petshop di DKI Jakarta menggunakan metode purposive sampling. Didapatkan empat lokasi pasar dan 12 petshop dengan jumlah 339 individu dari 11 jenis mamalia kecil yang ditemukan di pasar hewan dengan harga yang ditawarkan Rp 2.000–Rp 1.500.000, sedangkan dari petshop didapatkan 35 individu dari enam jenis mamalia kecil dengan harga yang ditawarkan Rp 20 000-Rp 500 000 tergantung jenis dan umur yang ditawarkan. Jenis mamalia kecil yang banyak diminati oleh pembeli adalah jenis hamster, sedangkan jenis mamalia kecil yang banyak dipelihara adalah jenis sugar glider., Small mammals are categorized by the weight of the mammal adult body between 2 grams to 5 kilograms, which made it attractive to be owned as pet. This research was conducted on May-June 2014 in animal market and petshop Jakarta using purposive sampling method. Obtained four markets and 12 petshops, there were recorded 339 individuals of 11 species of small mammals were found in the animal market with the price offered Rp 2 000 to Rp 1 500 000 while 35 individuals of six small mammals species obtained from the petshop at a price that is offered Rp 20 000-Rp 500 000 depending on the species and age of the offer The most wanted small mammals by the purchaser is hamster, whereas the most owned pet is sugar glider.
Keyword: DKI Jakarta, mamalia kecil, perdagangan

Judul: Perdagangan reptilia sebagai binatang peliharaan di DKI Jakarta
Abstrak: DKI Jakarta in the world of wildlife trade is often referred as yellow dots, a city vulnerable to illegal trade. Wildlife trade in DKI Jakarta consists not only on ornamental fish, mammals and birds, but even reptiles. This study aims to describe trade locations, identify species of trade and analyze preferences of pet reptiles. The study was conducted in five traditional markets and 35 pet shops in DKI Jakarta, using interviews and investigative methods. I also carried out survey on cyber-market trade and interviews to pet reptile owners. The study was carried out from August 20th to November 20th, 2010. A total of 52 species (26 species of turtles, 23 snakes and three lizards) were traded on traditional markets, and 46 species (21 species of turtles, 19 species of snakes and six species of lizards) at the pet store. In traditional markets the common species sold are local species, but not on pet stores where most are imported species. In total, survey found five species of protected reptiles according to PP No. 7 of 1999, four species of Appendix I CITES’s reptiles and six species listed as critically endangered by IUCN Red List. Three forums in internet carried out cyber markets of pet reptiles. The most favorite pet reptiles were snakes, especially the ball python (Python regius).
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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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