Judul: Analisis kinerja kelembagaan pangan local terhadap peningkatan ketahanan pangan rumahtangga miskin di Kasepuhan Sinar Resmi Kabupaten Sukabumi
Abstrak: Ketahanan pangan merupakan sektor yang rentan terhadap kemiskinan. Hal ini dapat dilihat dari tingkat kerawanan pangan dan status gizi buruk yang meningkat di daerah dengan tingkat kemiskinan yang tinggi. Namun, di Kasepuhan Sinar Resmi yang masyarakatnya tergolong miskin dengan sistem kelembagaan lokal yang baik tingkat kerawanan pangan dan status gizi buruk tidak terlalu signifikan. Oleh karena itu, diperlukan penelitian untuk mengetahui dampak adanya kelembagaan terhadap peningkatan ketahanan rumahtangga miskin di masyarakat Kasepuhan, Kabupaten Sukabumi yang dilaksanakan selama bulan April 2011 dengan menggunakan data primer dan sekunder. Analisis data yang digunakan dalam penelitian ini adalah deskriptif dan biaya transaksi.
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Judul: Peranan PUAP dan Raskin Dalam Perilaku Ekonomi dan Ketahanan Pangan Rumahtangga Petani (Kasus di Kecamatan Sadang, Kabupaten Kebumen)
Abstrak: The aim of this research is to descriptive performance of economic household and food security also analyze role of PUAP in paddy production and role of raskin in food consumption so that programs can improve agriculture household food security. This research used survey method to paddy peasant that received PUAP and raskin. To analyze performance of household food security used descriptive analysis by food availability, ratio food expenditure of total household revenue and number of energy sufficiency indicators. And to analyze role of PUAP and raskin in agriculture household food security used agriculture household model that consisted of 14 structural equations and 7 identities. The result indicated that paddy production used to household consumption so that for non food and human resources investment expenditure used income from non agriculture activity. Food security problem of 75% household sampel is food purchasing power that indicated by highly ratio food expenditure of total household revenue so that number of energy sufficiency have not been able to fulfill. PUAP not only has increased production so that increased food availability, but also increased non food expenditure. Raskin has reduced food expenditure but increased number of PUAP and raskin has decreased number of energy sufficiency. According to analysis result, production input subsidy will be effectice and efisien to increased paddy production so will improve household food availability and increase peasant revenue. Number of raskin need to increase adjusted to real rice need of household and also need high protein subsidy to increase number of energy sufficiency.
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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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