Judul: Kelembagaan penyuluhan partisipatif dalam pengelolaan hutan rakyat: studi kasus komunitas petani sertifikasi percabaan Dusun Pagersengon Kelurahan Selopuro Kecamatan Batuwarno Kabupaten Wonogiri Provinsi Jawa Tengah
Abstrak: The success of private forest can’t be separated from the contribution of various parties. The research objectives were to analyze the institution of private forest, to analyze stakeholder’s involvement, to analyze the processes and outcomes of participatory extension, and to formulate institution development strategy of participatory extension. The method used is a case study by which data collection was conducted by interview, observation, FGD, and documentation study. Poverty caused by land aridity awakened local leaders to realize the need for change. Observation of teak and mahagony plants that were able to survive in Selopuro made them to invite the neighbors to planting timber in their land. The invitation was rejected by the people so the leaders built a demplot with timber plants to show the public that timber plants were suited to the condition of Selopuro. Finally, people realized that their leaders were correct and people began to plant timber plants. Government, NGOs, foundations, and donor agencies also facilitated the community to achieve the expected change. The role of the parties run was different but with the same goal of helping people to help themselves. One of the impacts of participatory forestry extension is the improvement of community welfare.
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Judul: Pengkajian Motivasi Petani, Keberhasilan Tanaman dan Peranan Lembaga Terkait pada Kegiatan Penglolaan Hutan Rakyat Swadaya (Studi Kasus di Dusun Pagersengon, Desa Selopuro, Kecamatan Batuwarno, Kabupaten Wonogiri, Jawa Tengah)
Abstrak: Hutan rakyat di Dusun Pagersengon dibangun masyarakat secara swadaya mulai tahun 1968, dan berkembang hingga saat ini telah mencapai luas seluruhnya 49,9795 ha. Pada mulanya kegiatan ini diarahkan pada upaya rehabilitasi lahan kritis. Namun setelah berkembang, para petani memperoleh menfaat sebagai sumber pendapatan keluarga yang baru. Disamping manfaat-manfaat yang diperoleh petani dan keberhasilan merehabilitasi lahan kritis, keberhasilan kegiatan pengelolaan hutan rakyat di Dusun Pagersengon juga ditandai dengan diperolehnya predikat juara dalam berbagai lomba penghijauan.
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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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