Judul: Analisis Penerapan Sistem Produksi Terpadu Pada Pengolahan Karet SIR Unit Usaha Tebenan PT Perkebunan Nusantara VII, Palembang
Abstrak: PTPN VII is one of the State-Owned Enterprises (SOE) sector Indonesian plantation which carries on business in the field of agribusiness and agro-industries The purpose of this study identify the production system on rubber processing SIR Business Unit Tebenan PTPN VII and analyze the application of rubber processing capacity planning system SIR using CRP. Production system be applicable by PTPN VII has make to stock strategy. This strategy is used as raw material available for the manufacturing process can not be predicted. This makes the production system PTPN VII established the concept of a pull system. CRP obtained by the method that the system capacity in the processing of raw materials SIR rubber business unit Tebenan PTPN VII still be minimized because the ratio of raw material forecasting company produces 13 766 tonnes / year with winter forecasting method produces 13.600ton/tahun has a difference of 166 tons of raw materials. With a total capacity of 13,600 tons / year, load balancing and capacity of raw materials result in operating costs to reduce the burden.
Keyword: pull system, forecasting raw materials, capacity planning

Judul: Optimalisasi produksi karet olahan di PTPN VIII Kebun Jalupang Subang
Abstrak: Jalupang garden which is one of the business units of PTPN VIII. By using a linear program LINDO, this study was conducted to analyze the combination of processed rubber production in Gardens Jalupang that companies analyze the allocation of the use of inputs / resources on Jalupang Gardens in order to achieve optimal conditions. In the period of one year (May 2011-April 2012), Gardens Jalupang able to obtain optimum reception at the value of Rp 76,364,690,000.00. Meanwhile, the actual receipt is Rp 81,906,284,918.00 with dry rubber processed products as RSS as 2.17928 million Kilograms Dry Rubber (77.1%) and as many as 646 441 Kilograms Concentrated Latex Rubber Dry (22.9%). Then the results of the analysis indicate that the Resource Status of the limiting resource is Taksasi Latek Concentrated (LP). and Labor is not a limiting resource and reduction of as much as 20% of raw materials will greatly affect the amount of processed rubber production in Jalupang Gardens
Keyword: Bogor Agricultural University (IPB), Concentrated Latex, RSS, Rubber Processing, Optimization of Production

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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