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: Analisis Kemitraan Agroforestri antara Kelompok Tani dengan PT BUMN Hijau Lestari I di Kabupaten Bandung Jawa Barat
Abstrak: PT BUMN Hijau Lestari I (PT BHL) is applying the concept of agroforestry partnership with the community to implement the mandate reforestation in watersheds. Partnership in Bandung regency has built over three years. This research aims to identify pattern of agroforestry partnership between KMK and PT BHL, analyze the performances of plants cooperation based aspect of percent growing plants and crops coffee and analyze the level of partnership. This research was done to 20 of 59 KMK who have been partnered since 2010. The result showed that, partnership built is cooperation patterns operational agribusiness (COA) that is both long term. Performance plant cooperation only reached 79% (woody plant), 37% (fruit trees) and 77% (coffee plant). The level of partnership scored 659.3 (Prima Intermediate Partnership) which means this partnership still needs to increase cooperation especially optimization aspect benefits.
Keyword: prima intermediate, performance, partnership, agroforestry

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: