Judul: Pengaruh kemitraan terhadap pendapatan petani manggis di Desa Karacak Kecamatan Leuwiliang Kabupaten Bogor
Abstrak: Manggis merupakan tanaman buah berupa pohon yang berasal dari hutan tropis yang teduh di kawasan Asia Tenggara yaitu hutan belantara Malaysia dan Indonesia. Buah manggis adalah salah satu komoditi unggulan Indonesia yang memiliki potensi untuk di ekspor ke luar negeri. Namun, keterbatasan petani manggis terhadap informasi harga dan jaminan pasar menjadi kendala paling besar untuk mengembangkan potensi buah manggis. Salah satu upaya untuk mengatasinya, yaitu dengan kemitraan. Petani manggis Desa Karacak, Kecamatan Leuwiliang, Kabupaten Bogor telah melakukan kemitraan dengan PT.Agung Mustika Selaras. Tujuan penelitian ini adalah untuk mendeskripsikan mekanisme pelaksanaan kemitraan antara PT. Agung Mustika Selaras dengan petani manggis di Desa Karacak, Kecamatan Leuwiliang, Kabupaten Bogor dan menganalisis pengaruh kemitraan terhadap pendapatan petani manggis di Desa Karacak, Kecamatan Leuwiliang, Kabupaten Bogor. Pengambilan data pada penelitian ini dilaksanakan pada bulan Oktober-November 2012. Responden penelitian ini adalah seluruh petani mitra di Desa Karacak sebanyak 23 orang dan petani non mitra sebanyak 25 orang. Penelitian ini menggunakan analisis deskriptif, statistika deskriptif, analisis pendapatan usahatani, dan rasio (R/C).
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Mangosteen, Partnership, Analysis of farming income, The ratio(R/C)

Judul: Pengaruh Kemitraan Terhadap Pendapatan Petani Manggis Di Desa Karacak Kecamatan Leuwiliang Kabupaten Bogor
Abstrak: Mangosteen is a fruit tree crop that comes from a shady tropical forests in Southeast Asia. Mostly comes from Malaysian and Indonesian jungle. Mangosteen fruits one of Indonesia'sleading commodities for agribussiness. And therefore mangosteen have the potential to be exported to foreign countries. But the limitations of mangosteen farmers towards price information and market assurance are recognized as the greatest obstacle to developing the potential of the mangosteen fruit. One effort to resolve that problems is by using the partnership. Mangosteen farmers in Karacak Village, Leuwiliang, Bogor, has already made a partnership with PT. Agung Mustika Selaras. The aim of this research is to describes the implementation of partnership mechanism between PT. Agung Mustika Selaras with mangosteen farmers in Karacak Village, Leuwiliang, Bogor and also to analyzes the influence of partnership toward mangosteen farmer’s income in the Karacak village, Leuwiliang, Bogor. Data for this research was taken from October 2012 to November 2012. The respondent of this research is all partners farmer in Karacak village with the amount 23 farmers and non partner farmers with the amount 25 farmers This research is analyzed by using descriptive analysis, descriptive statistical , analysis of farming income, and the ratios (R/C).
Keyword: 

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.
Keyword: