Judul: Aplikasi Pupuk Organik terhadap Pertumbuhan Jati Unggul Nusantara (JUN) UBH-KPWN di Kecamatan Rancabungur Kabupaten Bogor
Abstrak: Jati Unggul Nusantara (JUN) is the type of teak tree produced by biotechnology through vegetative propagation with cuttings and rooting system modifications done to produce good root compound. The type of this fast-growing teak, sturdy and can be harvested from the age of 5 years and has a good phenotype quality. The purpose of this research is to know the growth rate of JUN with different doses of organic fertilizer treatment. Variable measured of tree are diameter, total height, clear bole height and canopy projection, and made observations on the relative growth rate of them. Organic fertilizer gives a significant influence on the confidence interval of 95% for the diameter at doses of 150 grams and canopy projection JUN at doses of 200 grams. As well as fertilizers dose 150 grams provide a tangible influence on the growth rate of diameter, plant height and canopy projection.
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Judul: Evaluasi pertumbuhan tegakan Jati Unggul Nusantara (JUN) berdasarkan kondisi wilayah penanaman di Pulau Jawa
Abstrak: Jati Unggul Nusantara (JUN) is a genetically modified teak which has a faster harvest rotation than another variance of teak that in 5 years, stands can gets an average diameter of 20 cm. The purposes of this research are to evaluate the growth of JUN based on growing environmental conditions and to estimate JUN dimensions outlook based on rotation age. This research was conducted at three sites representing JUN stands on Java, which is Bogor regency representing West Java, Kulon Progo regency, Yogyakarta represent Central Java, and Ngawi regency represent East Java. The results showed that JUN stands in Ngawi, East Java has the fastest growth than all research sites however the average diameter of 5 years JUN stands on all sites are no one which up to 20 cm. The main issues of the final results that did not appropriate the target are poor seeds quality from seedbed and poorly field managements.
Keyword: Bogor Agricultural University (IPB), stands growth, Jati Unggul Nusantara (JUN), growth model

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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