Judul: Studi Kasus Penanganan Pascapanen Komoditas Tomat di Koperasi Mitra Tani Parahyangan Cianjur.
Abstrak: Koperasi Mitra Tani Parahyangan merupakan koperasi yang bergerak dibidang hortikultura. Komoditas unggulan koperasi ini adalah tomat merah. Tujuan dari penelitian ini adalah untuk mengetahui saluran pemasaran tomat serta menganalisis penanganan pascapanen tomat di koperasi Mitra Tani Parahyangan. Metode yang digunakan dalam penelitian ini adalah metode studi kasus dengan data kualitatif. Teknik pengumpulan data dengan purposive sampling. Hasil penelitian menunjukan bahwa koperasi Mitra Tani Parahyangan memasarkan tomat ke beberapa supermarket di wilayah jabodetabek, pasar tradisional, serta restaurant di wilayah cianjur. Penanganan pascapanen di koperasi Mitra Tani Parahyangan khususnya komoditi tomat adalah pemanenan, pencucian, sorting dan grading, pengemasan, dan distribusi. Kualitas komoditi di koperasi masih dapat ditingkatkan dengan meminimalisir sentuhan terhadap komoditas dan menerapkan penyimpanan dingin.
Keyword: Koperasi Mitra Tani Parahyangan, pascapanen, penyimpanan dingin, tomat

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: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model