Judul: Pola Kemitraan antara Petani dengan UBH-KPWN dalam Usaha Hutan Rakyat Jati Unggul Nusantara di Desa Ciaruteun Ilir, Kabupaten Bogor
Abstrak: Usaha Bagi Hasil Koperasi Perumahan Wanabakti Nusantara (UBH-KPWN) is a business unit developed by the Forestry Department engaged in the farming of National Superior Teak (JUN). UBH-KPWN applies the concept of profit sharing partnership in farming activities. This partnership system is specifically made by UBH-KPWN in order to maintain the farming continuity of national superior teak (JUN). The partners of UBH-KPWN include farmers, investors, landowners and the village government. To determine the forms of partnership between UBH-KPWN and its partners (farmers, investors, landowners and the village government), it is necessary to study the feasibility and the extent of partnership, whether it is beneficial to both parties. This research was conducted from April through June 2011 in the village of Ciaruteun Ilir, Cibungbulang District, Bogor Regency. The data in this study were collected using interviews and a survey. The respondents were selected by a stratified purposive sampling method based on the land area under cultivation. The number of respondents was 60 people. The analysis of the feasibility of community forests in terms of partnership was done in two phases: (1) analysis of cost sharing and (2) partnership-level analysis by a scoring method. The partnership pattern of the community forest in Ciaruteun Ilir village is feasible for the farmers, UBH-KPWN, investors, landowners and the village
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Judul: Pola Kemitraan dalam Pembangunan Hutan Rakyat Oleh PT Insan Prima Berdikari di Kabupaten Pandeglang Banten
Abstrak: Pengelolaan hutan rakyat yang terjadi sampai saat ini sebagian besar masih belum dapat meningkatkan kesejahteraan masyarakat dan petani. Hadirnya kemitraan dalam pengelolaan hutan rakyat dapat mendorong petani berperan lebih aktif dan mengubah pengelolaan hutan rakyat yang dulunya masih tradisional menjadi ke arah komersial. Tujuan pada penelitian ini untuk mengetahui sistem pengelolaan dan menganalisis pola hubungan kemitraan yang diselenggarakan oleh PT Insan Prima Berdikari (PT IPB) dengan para mitranya. Pengambilan data menggunakan metode survey dengan pemilihan responden secara purposive sebanyak 32 orang terdiri dari penggarap lahan, pemilik lahan, dan PT. IPB. Hasil penelitian menunjukan bahwa hutan rakyat dikembangkan dengan pola tanam agroforestri antara pohon sengon dengan tanaman pisang dan talas. Pola hubungan kemitraan antara PT IPB dengan para mitranya merupakan Kerjasama Operasional Agribisnis (KOA) dengan sistem bagi hasil penjualan sengon sebagai berikut: PT IPB mendapat 25%, penggarap lahan 10%, penyedia dana 35%, lembaga desa, dan pendamping desa yang masing-masing pihak tersebut 2,5%., Most of the community forest management that has occurred so far has not been able to improve the welfare of the community and farmers. The presence of partnerships in community forest management can encourage farmers to play a more active role and change community forest management from traditional to commercial ones. The purpose of this study is to determine the management system and analyze the pattern of partnership relationships held by PT Insan Prima Berdikari (PT IPB) with its partners. Data were collected using a survey method with a purposive selection of 32 respondents consisting of land cultivators, land owners, and PT. IPB. The results showed that community forests were developed with an agroforestry cropping pattern between sengon trees and banana and taro plants. The pattern of the partnership relationship between PT IPB and its partners is the Agribusiness Operational Cooperation (KOA) with a profit-sharing system from the sale of sengon as follows: PT IPB gets 25%, land cultivators 10%, fund providers 35%, village institutions, and village assistants each each party is 2.5%.
Keyword: community forest, partnership, profit sharing, agroforestry

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