Judul: Pengaruh Dosis Pupuk Akar dan Pupuk Daun terhadap Pertumbuhan Bibit Saninten (Castanopsis argentea Blume A.DC)
Abstrak: Saninten (Castanopsis argentea) is one species of the tree producing wood, fruit, and also dye from the skin of fruit and bark that has economic value. Good quality of seed is necessary to get an optimal production. So we need to stimulate the growth, one of them by root and leaves fertilizing. This research was conducted in SEAMEO BIOTROP greenhouses bye use a complete randomized factorial design (CRD factorial). Treatment that is given is root fertilizing with consentrate of fertilizer 0 g, 2.5 g, and 5 g, which combine with leaves fertilizing with consentrate of fertilizer 0 g/L, 1g/L, 2 g/L, and 3 g/L. Root fertilizer was given one time on each, and leaves fertilizer given per 2 weeks for during 8 weeks observation. The parameters measured in this research were height of seedlings, diameter of seedlings, dry weight of seedlings, top root ratio, and seedlings quality index. The results showed that height of seedlings, diameter of seedlings, dry weight of seedlings, and seedlings quality index was significantly affected bye the treatment. The best treatment is combination of root fertilizer 2.5 g and leaves fertilizer 3g/L. This treatment could increas heigth of seedlings up to 56.47% compared with control. The diameter seedlings up 88.68% towards control. The increas of root and shoot dry weight were 54.40% and 73.43%, respectively. Seedlings quality index increased by 64.65%.
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Judul: Respon Pertumbuhan Tunas Saninten (Castanopsis argentea (Blume) A.DC.) terhadap Pemberian Zat Pengatur Tumbuh BAP dan IAA secara In Vitro
Abstrak: Saninten (Castanopsis argentea (Blume) A.DC.) adalah salah satu anggota famili Fagaceae yang merupakan penghasil kayu dan non kayu. Perbanyakan saninten secara in vitro belum pernah dilaporkan. Penelitian ini bertujuan untuk mengidentifikasi respon pertumbuhan tunas saninten terhadap pemberian zat pengatur tumbuh (ZPT) 6- benzylaminopurine (BAP) dan indole-3-acetic-acid (IAA) dengan konsentrasi yang berbeda secara in vitro pada media woody plant medium (WPM). Penelitian dilakukan dengan rancangan acak lengkap faktorial, dengan 2 faktor yaitu macam ZPT dan konsentrasi ZPT. Macam ZPT terdiri atas 2 taraf yaitu BAP dan IAA. Konsentrasi ZPT terdiri atas 3 taraf yaitu BAP dan IAA 0 mg/L, BAP 0.5 mg/L atau IAA 0.1 mg/L, dan BAP 1.0 mg/L atau IAA 0.2 mg/L. Peubah yang diamati ialah jumlah tunas, tinggi tunas, dan pertumbuhan kalus. Kombinasi ZPT BAP (0, 0.5, 1 mg/L) dengan IAA (0, 0.1, 0.2 mg/L) belum menghasilkan pertumbuhan tunas yang optimal. Media WPM dengan BAP 0.5 mg/L mampu menghasilkan persentase eksplan bertunas, jumlah tunas, dan pertambahan tinggi tunas terbaik. Media WPM dengan IAA konsentrasi 0.1 dan 0.2 mg/L menghasilkan pertumbuhan eksplan ke arah pembentukan kalus.
Keyword: 6-benzylaminopurine (BAP), Castanopsis argentea, indole-3-acetic-acid (IAA), woody plant medium (WPM)

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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