Judul: Pertumbuhan Jabon Merah, Jabon, dan Sengon Buto di Lahan Bekas Tambang Batubara PT. Tunas Inti Abadi, Kalimantan Selatan
Abstrak: Mined land reclamation are important in restoring environmental conditions such as baseline prior to mining activites. The purpose of this research is to look effect manure dose given to each planting hole on jabon merah (Anthocepalus macrophyllus), jabon (Anthocepalus cadamba) and sengon buto (Enterelobium cylocarpum) and to compare the best growth of all three species of plants. The research was conducted on mined lands of PT. Tunas Inti Abadi, South Kalimantan. Experimental design used in this research was completely randomized design (CRD) factorial, with factors are spesies and dose of manure. Parameters used to look the growth of plant is height and diameter. Result showed that the dose of manure significantly affected diameter growth, but did not significantly affect plant height growth. Highest diameter growth was made by sengon buto. Spesies did not significantly affect diameter, but they showed significant differences on height growth rate. Sengon buto is the fastest growing species in term of height. Interaction between the dose of manure to species of plant affect only on diameter. The best species among the three spesies itested was sengon buto.
Keyword: 

Judul: iRespon Pertumbuhan Tanaman Jabon (Anthocephalus cadamba (Roxb.) Miq.) Terhadap Pengapuran di Areal Bekas Tambang
Abstrak: The main problem of reclamation activities in the postmining land was marginal land that could not support the growth of plants, due to pH and the low level of nutrient. So that, the selection of local species which adaptable and the appropriate silviculture treatment was needed. Jabon (A. cadamba) is one of local tree species that had high prospect, because jabon classified into fast growing species, able to adapted various site conditions, and the silviculture treatment was relatively easy. Dolomit and gypsum were materials that contained of Ca (Calcium), which able being applied to increase the soil pH. This objectives research was to determine the effect of dolomit, crude gypsum and manure fertilizer on the growth of Jabon in postmining land at PT. Tunas Inti Abadi. The fertilizers treatment consisted of three treatments. There were 2 kg of manure fertilizer (N), 2 kg of manure fertilizer + 200 g of dolomit (KN), and 2 kg of manure fertilizer + gipsum 200 g (GN). The parameters that be measured were diameter, height, crown diameter, percentage of living. The combination of dolomit and manure fertilizear had significant effect on the 95% confidence interval the diameter of Jabon.
Keyword: reclamation, calcification, fertilizer, jabon

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: