Judul: Analisis produksi dan daya saing usaha penggemukan sapi potong di Kabupaten Agam Provinsi Sumatera Barat
Abstrak: The domestic beef cattle producers have supplied only 70 percent of the national need. Demand of the beef cattle has not been accompanied by an increased supply response. One of the major problems in beef cattle fattening is its low productivity that might be caused by its low efficiency of input use. On the other side low productivity also caused an increase in the number of imported beef cattle. Therefore, this study aims to analyze : (1) factors that influence the production of beef cattle fattening, (2) the level of technical efficiency of beef cattle fattening, (3) beef cattle fattening competitiveness, and (4) the impact of government’s input-output policy on the competitiveness of beef cattle fattening in Agam district. The stochastic production frontier is used to estimate production function, while Policy Analysis Matrix was employed in this study to measure level of competitive and comparative advantage and effect of government interventions on beef cattle fattening. The results showed that quantity of forage, concentrate, cattle’s age, and livestock ownership significantly influence production. The average value of the farm technical efficiency is 0.764 ranging from a minimum of 0.478 to a maximum of 0.996. Beef cattle fattening is profitable and has competitive and comparative advantage. Fattening produces profits that create positive incentives for producers and reflect an efficient use of domestic resources.
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Judul: Mode l of beef cattle production system based on local resources in Sumeda ng West Java
Abstrak: Kebijakan pemerintah Provinsi Jawa Barat yang juga dikaitkan dengan pelaksanaan otonomi daerah adalah mengembangkan daerah-daerah berpotensi sebagai sentra produksi sapi potong. Beberapa daerah yang berpotensi dengan prosentase populasi sapi potong dari urutan tertinggi adalah Kabupaten Ciamis (11.33%), Tasikmalaya (10.24%), Sumedang (9.06%), Cianjur (8.93%), Subang (6.46%), da n Purwakarta (6.38%) (Dinas Peternakan Jawa Barat 2010). Kabupaten Sumeda ng ada lah salah satu daerah yang sangat potensial untuk dijadikan sentra pengembangan sapi potong di Jawa Barat. Populasi sapi potong pada tahun 2010 sebesar 32 577 ekor yang terdiri dari 11 618 ekor jantan dan 20 959 ekor betina dan tersebar pada sekitar 14 125 rumah tangga peternak (RTP). Beberapa permasalahan mendasar yang menentukan perkembangan sapi potong di Kabupaten Sumedang, antara lain (a) program pengembangan sapi potong oleh pemerintah belum berhasil optimal, (b) peternak mengalami kesulitan dalam penyediaan pakan ternak sapi terutama pada saat musim kemarau, (c) manajemen budidaya ternak masih tradisional. Penelitian ini bertujuan (a) mengidentifikasi dan menganalisis potensi sumberdaya alam dan sumber daya manusia dalam pengembangan sapi potong, (b) mempe lajari sistem prod uks i berdasarkan pola pemeliharaan, (c) analisis strenght, weakness, opportunity, threats (SWOT) digunakan untuk merumuskan solusi alternatif pemecahan masalah, membuat proyeksi pengembangan, dan menganalisis efisiensi usaha sapi potong. Penelitian ini dilaksanaka n di Kabupaten Sumedang Jawa Barat selama 12 bulan dari bulan Mei 2008 sampai April 2009.
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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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