Judul: Peranan Sanrego (Lunasia amara Blanco) dalam Memperpendek Siklus Ranggah dan Meningkatkan Libido Seksual Rusa Timor (Cervus timorrensis de Blainville) Jantan.
Abstrak: The aims of the research are :1) to explore the role of sanrego in decreasing antler cycle stags and increasing timor stags libido sexual, 2) to observe the appropriate doses of sanrego and 3) to know the sexual behaviour of timor stags. Three difference doses of sanrego ware tested to the timor stags, i.e.6.000 mg, 8.000 mg and 10.000 mg per individual respectively. The role of sanrego in increasing libido sexual was analyzed using completely randomizet design, which was carreid out by significan difference least test. The trials showed that there were significant different (a < 0,05) in increasing libido sexual of timor stags, which was shown by its sexual behavior, i.e. approaching of famale (14,7±9,4), smelling the vulva (31,8±30,1), crying stage (10,7±5,0), wallowing in a mudhole (6,7±2,8), scrubing its velvet (8,2±5,0), agonistic (12,6±9,4) and mounting female (11,6±13,8), and there was no significant different in copulation activity (0,1±0,3). The use of sanrego of 10.000 mg doses gave the highest sexual, which was shown by the appearance shedding (4 th day), activities highest sexual, the longest performance of sexual activities (10 days) and the respon to sexual appearance (4th day). The sexual behaviour of timor stags was defined by: 1) approaching and driving the estrus female, wallowing, scrubing its velvet, 2) kissing of estrus female, agonistic to other males, kissing urine of estrus female and crying stage 3) erection, 4) mounting 5) intromision, 6) ejaculation, 7) refraktorinese. The total sexual activities was appeared within nine days.
Keyword: 

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: 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: