Judul: Impact of Breeder Groups Membership on Beef Cattle Fattening Livestock Business Income in East Java Province
Abstrak: Sebanyak 90% produksi daging sapi nasional berasal dari peternakan rakyat. Pendapatan dari usaha peternakan penggemukan sapi potong menjadi salah satu sumber pendapatan bagi peternak terutama yang masih berskala kecil dan memiliki luas lahan pertanian yang sempit. Kelompok peternak menjadi salah satu upaya untuk meningkatkan kompetensi peternak yang dapat berdampak pada peningkatan pendapatan yang diperoleh. Penelitian ini bertujuan untuk menganalisis dampak keanggotaan kelompok peternak terhadap pendapatan peternak penggemukan sapi potong. Data yang digunakan merupakan data sekunder Survei Rumah Tangga Usaha Peternakan Tahun 2014 yang bersumber dari Badan Pusat Statistik di Provinsi Jawa Timur. Pengolahan data dilakukan secara kuantitatif dengan analisis pendapatan dan propensity score matching (PSM). Hasil penelitian menunjukkan bahwa kelompok peternak tidak berpengaruh secara signifikan terhadap pendapatan usaha peternakan penggemukan sapi potong di Jawa Timur., As much as 90% of national beef production comes from smallholder farms. Income from fattening beef cattle is a source of income for breeders, especially those that are still on a small scale and have a narrow agricultural land area. Breeder groups are one of the attempts to increase the competence of breeders so that it can have an impact on increasing the income earned. This study aims to analyze the effect of breeder groups membership on the income of beef cattle fattening farmers. The data used is secondary data from the “Survei Rumah Tangga Usaha Peternakan Tahun 2014” sourced from the Badan Pusat Statistik of East Java Province. Data processing was carried out quantitatively with income analysis and Propensity Score Matching (PSM). The results showed that farmer groups had no significant effect on beef cattle fattening income in East Java.
Keyword: beef cattle, income, livestock group, propensity score matching

Judul: Evaluation of Beef Cattle Breeding Management from Livestock Aid Grants
Abstrak: Upaya pengembangan sapi potong dalam rangka peningkatan produksi hasil peternakan dilaksanakan oleh Dinas Peternakan dan Kesehatan Hewan Kabupaten Pesisir Selatan melalui program bantuan ternak sapi potong yang diberikan pada kelompok ternak dengan tujuan untuk meningkatkan hasil ternak sehingga dapat meningkatkan pendapatan peternak. Penelitian ini bertujuan mengevaluasi penerapan manajemen pemeliharaan yang baik sesuai dengan standar GFP pada kelompok ternak penerima bantuan. Metode yang digunakan adalah wawancara dan observasi. Kuesioner meliputi pengetahuan reproduksi, manajemen pakan, tatalaksana pemeliharaan, kesehatan dan penyakit serta perkandangan. Dampak penerapan manajemen pemeliharaan diamati berdasarkan BCS sapi potong. Responden penelitian adalah 10 orang anggota kelompok ternak Pincuran Boga Sakato dan 15 orang anggota kelompok ternak Padang Dama II. Data dianalisis menggunakan metode analisis deskriptif. Hasil penelitian penerapan manajemen pemeliharaan pada kedua kelompok ternak mendapatkan kategori kurang, dengan persentase Pincuran Boga Sakato sebesar (49,95%) dan Padang Dama II (54,86%) Penerapan aspek yang perlu mendapat perhatian adalah pengetahuan reproduksi, tatalaksana pemeliharaan serta kesehatan dan penyakit ternak. Secara keseluruhan performa sapi di kelompok Padang Dama II lebih baik dari pada di kelompok Pincuran Boga Sakato., The efforts to develop beef cattle in order to increase livestock production are carried out by the Department of Animal Husbandry and Animal Health of Pesisir Selatan Regency through a beef cattle grant program to farmers groups with the aim of increasing livestock yields so as to increase farmer income. This study aims to evaluate the implementation of beef cattle management in accordance with GFP standards in groups of farmers. The method used consists of interview and observation. The questionnaire includes knowledge of reproduction, feed management, maintenance management, health and disease and housing. The impact of the implementation beef cattle management was observed based on the BCS of beef cattle. Research respondents were 10 members of the Pincuran Boga Sakato farmers group and 15 members of the Padang Dama II farmers group. Data were analyzed using method. The result of the study on the application of beef cattle management to both group of farmers were categorised in the less category (<60%), the percentage of Pincuran Boga Sakato (49,95%) and Padang Dama II (54,86%) The application of aspects that need attention is the knowledge of reproduction, maintenance management and health and disease of livestock. Overall, the performance of the beef cattle management in Padang Dama II farmers group was better than in the Pincuran Boga Sakato farmers group.
Keyword: beef cattle, breeding management, grant program

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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