Judul: Pengaruh Pemberian Tanaman Sorgum (Sorghum bicolor L) terhadap Pertumbuhan Rusa Timor (Rusa timorensis de Blainville 1822) di Hutan Penelitian Dramaga, Bogor
Abstrak: Timor deer (Rusa timorensis de Blainville 1822) is a tropical species that are protected by IUCN with categories vulnerable and in fear became extinct. Growth timor deer can be accelerated by additional feed sorgum (Sorghum bicolor L) with carbohydrate, protein and fat which good for the deer growth. This research aim are to examine the consumption and feed conversion timor deer by providing sorghum, assessing weight and size of the Timor deer morphometric growth by providing sorghum, reviewing timor deer feeding behavior and feed selection in captivity. The research conducted at the Research Forest Dramaga managed by Pusat Penelitian dan Pengembangan Konservasi dan Rehabilitasi, Badan Litbang Kehutanan, Kementerian Kehutanan, Bogor using Latin square design consisting of four formulations of treatment A (feed basic from of elephant grass 50 % + kaliandra 50 %), B (feed basic 85 % + sorghum 15 %), C (feed basic 70 % + sorghum 30 %), D (feed basic 55 % + sorghum 45 %). The riset used four timor deer with ages 12-16 months consisting of two males and two females. The riset have four treatment periods consisting of 4 days for preliminary and 12 day for collecting data. Weight and morphometric size was measured before and after treatment in each period. The results shows that not significant effect (P> 0.05) the treatment of the dry matter intake, feed conversion, weight and morphometric timor deer in captivity, but there is a significant effect on sex differences deer with T count 16,82 and T Table 3,18. Timor deer was consume the feed for 2-3 hours or 120-180 minutes for 9 hours in the morning, for 2-2.5 hours or 120-150 minutes for 9 hours in the day used for rest (rumination), the afternoon deer spent 3-3,5 hours or 180-210 minutes for 9 hours to consume feed. Preferensi and favored by the timor deer in captivity is elephant grass (Pennisetum purpureum) with an average frequency of 32,8 times per day and sorghum (Sorghum bicolor) with an average frequency of 25,2 times and kaliandra (Caliandra callotyrus) with an average frequency of 21,6 times.
Keyword: 

Judul: Perilaku dan Aspek Pakan Rusa Timor (Rusa timorensis Blainville 1822) Remaja Pada Kandang dan Jenis Pakan yang Berbeda
Abstrak: Efforts to improve the productivity of java deer (Rusa timorensis) can be done through improvements in the feed management and maintenance customized with deer behavior. This research aims to study the aspects of feed and daily behavior of java deer in adolescent age group (12-24 months) in captive breeding of Hutan Penelitian Dramaga, Bogor. In this study, deer were fed selective forage (Coix lacryma-jobi Lour, Pennisetum purpureum Schum, Hierochloe horsfieldii Maxim, and Commelina benghalensis L) and field grass. Result show on individual cages, the highest feed preference value was Pennisetum purpureum Schum and the highest feed palatability value was Hierochloe horsfieldii Maxim. The opposite result occured in the collective cage. On feeding selective forage, the average daily consumption of fresh and dry matter of feed, daily gain and feed efficiency deer were 4.87± 0.51 kg/head/day, 0.73±0.07 kg/head/day, 0.15±0.05 kg/head/day and 22.59%. Averaged digestibility coefficients of feed of java deer was 52.95±6.90% of dry matter, 30.87±26.00% of crude fat, 49.68±2.76%of crude protein, 56.49±6.48% of crude fiber, and 59.21±8.40% of N-free extractive. Daily behavior of java deer in individual cages were dominated by eating, rumination, movement and resting. In conclusion, to increase production that deers is better to be raised on individual cages.
Keyword: 

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: