Judul: Perilaku Rusa Timor (Rusa timorensis de Blainville, 1822) Betina di Penangkaran Akibat Pemberian Tabat Barito (Ficus deltiodea Jack)
Abstrak: Timor deer is one of deer species which potential to be developed. Captivity is one of timor deer utilization which aim to maintain the population of timor deer as protected species. However, there are various issues related to its reproduction so that reproductive technology is required to improve female timor deer reproduction by stimulating sexual desire of female timor deer using natural materials that are aphrodisiac, one of them is tabat barito. The aim of this research is to determine the influence of giving tabat barito with various doses against daily activity and sexual behavior of female timor deer. There are 4 tabat barito doses which are given for 28 days. The doses are 0 mg, 4000 mg, 5000 mg and 6000 mg. The result of this research indicates that different dose which given not significantly influence the daily activity and sexual behavior. However, the 6000 mg dose can stimulate female deer estrus so copulation happened.
Keyword: tabat barito., sexual behavior, female timor deer, captivity

Judul: The Effect of the Sanrego Leaf Extract on Sexual and Ingestive Behavior of the Timor Deer in Captivity
Abstrak: Rusa timor merupakan salah satu jenis satwa liar yang banyak dimanfaatkan dan dikembangkan di penangkaran. Indikator kunci keberhasilan penangkaran adalah sukses reproduksi. Salah satu cara untuk menstimulasi aktivitas reproduksi, khususnya libido seksual pada rusa jantan adalah dengan pemberian bahan-bahan yang bersifat afrodisiaka seperti sanrego. Penelitian ini bertujuan untuk menguji efek pemberian ekstrak daun sanrego terhadap perilaku makan, istirahat, dan seksual, serta menganalisis efektivitas dosis pemberian ekstrak daun sanrego terhadap peningkatan libido seksual pada rusa timor jantan. Pembuatan ekstrak daun sanrego dilakukan dengan cara maserasi sedangkan pengamatan perilaku seksual dilakukan dengan metode focal animal sampling. Terdapat empat dosis ekstrak sanrego yang diberikan selama empat periode yaitu 0 mg (R0), 600 mg (R1), 800 mg (R2), dan 1000 mg (R3). Hasil penelitian menunjukkan bahwa pemberian ekstrak daun sanrego berpengaruh signifikan terhadap perilaku makan, perilaku istirahat, perilaku mendekati betina, perilaku menciumi alat kelamin betina, dan perilaku menaiki betina, tetapi tidak berpengaruh signifikan terhadap perilaku menggosok-gosokkan ranggah dan perilaku nyengir. Pemberian ekstrak daun sanrego pada dosis 1000 mg diketahui paling efektif dalam meningkatkan libido seksual rusa timor jantan di penangkaran., Timor deer is one type of wildlife that is widely used and developed, especially in captivity. The keys indicators of captive success is reproduction. A way to stimulate sexual activity, specifically for deer’s sexual libido is by giving substance that contains aphrodisiac like sanrego. This research is aiming to testing the effect of sanrego leaf extract towards eating, resting, and sexual behaviour, and to analyze the effectiveness of the doses of sanrego extract to increase sexual libido in male timor deer. The sanrego extract was made by maceration whilst observations of sexual behavior were using the focal animal sampling method. There are four doses of sanrego extract given over four periods, namely 0 mg (R0), 600 mg (R1), 800 mg (R2), and 1000 mg (R3). The result shows that by giving ekstrak daun sanrego take significant effect to eating behavior, resting behavior, approaching females, smelling vulva, and mounting female shoulders, yet taking no significant effect to scrub it's velvet and crying stage behavior. The most effective doses to increase sexual libido on male tmor deer in captivity is 1000 mg.
Keyword: Behaviour, Sanrego, Sexual Libido, Timor Deer

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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