Judul: Pelaksanaan kemitraan dan pendapatan petani Tomat di PT Sayuran Siap Saji Desa Sukamanah Kecamatan Megamendung Kabupaten Bogor
Abstrak: Development of horticulture subsector is part of the development of the agricultural sector is being done to create a strong agribusiness in the future. West Java is a suitable area in the development of horticulture such as tomatoes. One of the tomato producing areas are in Bogor Regency is Sukamanah village Megamendung subsdistrict. Sukamanah village has many tomato farmers who run partnership with local agribusiness companies one of which is PT Sayuran Siap Saji. The problem that occurs if farmers do not have a difinate market so that farmers find it difficult to sell their product, and therefore hold that the partnership as a clear market certainty and price certainty. The purpose of this study to anlyze the level of income earned tomato farmer who partner dan non partner with PT Sayuran Siap Saji. The analysis used is analysis of revenue and R/C ratio. The result show the value of R/C ratio above cash cost for partner farmer 2,83 and 2,26 for non partner farmers. R/C based on the total cost of farmer partner 2,26 and 1,78 for non partner. The result of this analysis can explain that tomato farming activities are carried out through a partnership with PT Sayuran Siap Saji more efficient and more profitable for farmers.
Keyword: Bogor Agricultural University (IPB), revenue analysis, R/C analysis, tomato, partnership

Judul: Analisis Kemitraan Petani Tomat (Lycopersicum Esculentum) Pada Koperasi Mitra Tani Parahyangan (Studi Kasus : Anggota Kelompok Tani Mitra Tani Parahyangan, Cianjur Jawa Barat).
Abstrak: Farmers as entrepreneurs generally have a weakness in terms of technology, capital, market information and limited human resources. One effort that can be done to overcome these problems is through cooperation or partnership between the subsystems performed agribusiness. Mitra Tani Parahyangan is a cooperative engaged in horticulture who became a supplier to a modern market in the greater Jakarta area and traditional markets around Cianjur and members of the Mitra Tani Parahyangan Farmers Group is part of the partner farmers. The purpose of this study is to see how the partnership is held on the cooperative Generally partner farmers income is still greater than in non-partner farmers. Partnership benefits for farmers is higher income, higher selling prices, guaranteed markets, and as well as the coaching. Logistic regression analysis showed the age and price guarantees have a significant effect at α = 0.05 level against the decision of farmers to partnership.
Keyword: partnership, farmers, decision

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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