Judul: Induksi Pembungaan Jeruk Siem Kintamani dengan Paclobutrazol dan Zat Pemecah Dormansi BAP
Abstrak: Siem Kintamani is one of superior citrus commodities in Bali. The problem that faced by Siem Kintamani farmer’s is production of fruit is not distributed throughout a year. The purposes of this research was to study the effectiveness of paclobutrazol and dormancy-breaking substance BAP to induce flowering of Siem Kintamani (Citrus reticulata Blanco). The research was conducted at Siem Kintamani farmer’s in Mangguh Village, Bangli Regency, Bali in October 2014 to March 2015. The research was arranged as factorial randomized block design with 2 factors and 4 replications. The first factor is paclobutrazol aplication consists of 4 levels; 0, 0.5, 1.0, and 1.5 g/plant. Second factor is BAP aplication consists of 3 levels; 0, 100, and 200 ppm/plant. The result showed that the paclobutrazol effected to decrease the total of the shoots produced, shoot length, and increase the total of flowers. Paclobutrazol 0.5 g/plant increase total flowers production from Siem Kintamani plant. BAP 200 ppm increase the total shoots and not influence the flowering of Siem Kintamani plant. Combination treatment of paclobutrazol 1.5 g/plant and BAP 200 ppm/plant can increase the total of shoots production.
Keyword: BAP, effectiveness, off-season flowering, paclobutrazol

Judul: Induksi Pembungaan Jeruk Siem Kintamani (Citrus reticulata B.) dengan Paclobutrazol dan Zat Pemecah Dormansi KNO3
Abstrak: Bali is one of the central citrus productions in Indonesia. One of the obstacles that occurs in the production of citrus is its seasonal characteristic, so when harvest time the citrus productions will be overflowed and it makes the citrus’ price fallen sharply. The aim of this research is to study the effectiveness of paclobutrazol and KNO3 for induction flowering in off-season on the Siem Kintamani citrus (Citrus reticulata B.). This research was conducted at Mangguh Village, sub-district Kintamani, Bangli Regency. The experimental design is two factors Randomized Complete Block Design (RKLT). The expirement used paclobutrazol as a flowering induction and KNO3 as a breaking-dormancy. The Paclobutrazol’s dose are 0.0 (control), 0.5, 1.0, and 1.5 g/plant and the dose of KNO3 are 0.0 (control), 20 and 40 g/plant. The result shows that paclobutrazol and KNO3 can not increase the flowering, fruitset, and fruits total than control. Paclobutrazol application was effectively reduced the number of buds and reduced the leaves total than control. The interaction between paclobutrazol and KNO3 decreased the production of the buds significanly
Keyword: flowering, KNO3, off-season, paclobutrazol, Siem Kintamani citrus

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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