Judul: Faktor-faktor yang Mempengaruhi Petani Kakao dalam Adopsi Inovasi Teknologi Sistem Usahatani Intensifikasi Diversifikasi (Kasus pada Program Prima Tani di Desa Lambandia Kecamatan Lambandia Kabupaten Kolaka Provinsi Sulawesi Tenggara)
Abstrak: This research focused on technology adopting of variety of adoption levels in the farming system intensification diversification (SUID) of cocoa. Research design was survey and the sample was 125 cooperator farmers of the Prima Tani program. The data analysis was descriptive and inferential analysis conductig multi linier regression statistics analysis. The results research showed that technology adoption levels of the farming system intensification diversification (SUID) of cocoa farmer in the medium category. Components of the technology which appled by farmers was medium category. The influecing factors availability, labor of family, cast about activity to the information technology source, risk taking and behavior of farmers toward technology.
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Judul: Motivasi Petani dalam Menerapkan Teknologi Produksi Kakao  (Kasus Kecamatan Sirenja Kabupaten Donggala, Sulawesi Tengah)
Abstrak: Pembangunan pertanian bertujuan mengembangkan sistem pertanian berkelanjutan dan meningkatkan kualitas sumberdaya manusia sebagai penunjang sistem tersebut. Peningkatan kualitas sumberdaya manusia tersebut dapat dilakukan melalui peningkatan kompetensinya dalam berusahatani seiring dengan perkembangan ilmu pengetahuan. Kakao merupakan salah satu komoditas usahatani yang berperan penting dalam penyediaan tenaga kerja dan sumber devisa. Potensi kakao di Indonesia seluas 1.191.000 hektar, 87,4% dikelola oleh rakyat, dan 184.552 hektar (15 persen) berada di Sulawesi Tengah. Namun produksi kakao kering/ha di Sulawesi Tengah masih tergolong rendah (300-600 kg/ha/tahun). Salah satu upaya peningkatan produksi dan mutu kakao adalah mengefektifkan penerapan teknologi produksi kakao di tingkat petani. Hasil pengkajian BPTP Sulawesi Tengah menunjukkan perbedaan tingkat penerapan teknologi tersebut. Perbedaan penerapan ini diduga berhubungan dengan faktor internal, maupun eksternal, termasuk motivasi petani dalam penerapan teknologi kakao.
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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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