Judul: The Determination of Size and Seed Storage Techniques Kepok Banana (Musa sp. ABB Group) From The Hump
Abstrak: This study aims to find out size of the hump that is able to produce seedlings and to find out the best storage techniques to be able to maintain the viability and power shelf. The research was conducted at the Kebun Percobaan Pasirkuda, Ciomas, Bogor and Seed Science and Technology Laboratory, Departmen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. The study began in February to May 2011. The size of the best hump that have the highest potential growth maximum was 73.33% and the highest number of shoots of 3 shoots per hump is B5 (hump with an average weight of 7400 g and diameter 22.4 cm). The size of the best hump will be a reference for future experiments on storage techniques. The best storage method is without packing and without using fungicides. This method is able to make the hump can be stored for 6 weeks.
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Judul: Kriteria Kematangan Pascapanen Pisang Raja Bulu dan Pisang Kepok
Abstrak: Bananas are one of the leading fruit nation wide. Bananas are divided into 2 types based on the consumption. First, type the consumption of fresh bananas with banana varieties Raja Bulu samples and second type of processed plantain bananas with banana varieties Kepok samples. The purpose of this research is to study maturity indices studied post-harvest Raja Bulu banana and Kepok banana of some age picking fruit and determining the best harvesting time for postharvest handling. Observations that have been made show that the greater the picking age negatively correlated with the length of shelf life. At maturity level 5 color scale, picking bananas indicates different maturation process. At Raja Bulu Banana and Kepok Banana, apparent influence of shelf life observations, the percentage weight loss, percentage of edible parts, content of total tertitration acid, and content of vitamin C. Based on the results of the statistical analysis, the best harvest for post harvest handling in order to extend the shelf life on Raja Bulu Banana is 95 days, while for Kepok Banana is 110 days.
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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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