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: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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