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.
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Judul: Preferensi Pakan Tambahan Limbah Sayuran Pada Rusa Timor (Rusa Timorensis) di Penangkaran dan Pengaruhnya terhadap Perilaku Makan
Abstrak: Feed is the most important factors to determine the success of a captivity. Additional for age can be provided to deer to solve the limitation of grass availability as the primary feed for timor deer. Additional vegetables waste have advantage because the price is relatively cheap. Considering the problem, this research was conducted in the aim to identify kind of vegetable waste which is most preferred by the timor deer and any typical behavior which is possible showed by deer possibility as a negative impact of additional vegetables waste as feed. Research was held in captivity deer of Dramaga Research Forest in June until July 2012. Four individual timor deers (2 adult males and 2 adult females) were observed and four type of feed (mixed grass, corn skin, cabbage waste and chicory waste) were provided as additional for ages. There were two observation techniques used, they were supplementary feed preference and eating behavior. In feed preference, three types of vegetable waste and mixed grass as primary feed were given simultanously to deer . Two kilograms of each feed type were given daily to each. While in eat behavior, for age were given based on treatment. Every treatment consisting of 3 kg mixed grass and 3 kg vegetable for each pair deer. The data of feed preference were analysed by Index Nue. The result showed that skin of corn was preferred by both male and female deer with w value sequently 1,32 and 1,36. Afterward, vegetable waste feed affected eating behavior of the timor deer. The period of eating relatively shorter on the type of supplementary feed which was most preferred by both male and female timor deer, and longer on the type of supplementary feed which was not preferred. Chi-Square test showed that there was a significant difference, it showed the value of count χ² (161,387) was larger than the value of table χ² (7,378). Moreover, typical behavior as a negative affect from leftover cabbage as supplementary feed was found. It happened to male timor deer which fell asleep and drooling while sleeping. This was because cabbage contained a gas that could increase the gas in the stomach, so the timor deer's energy focused on the digestive system and caused male timor deer asleep.
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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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