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: Evaluation of Good Farming Practice in Beef Cattle Breeding and Breedfat in Astomulyo Village, Central Lampung
Abstrak: Kelompok peternakan pembiakan dan penggemukan sapi yang memiliki kepemilikan ≥100 ekor diperlukan pengelolaan yang profesional berdasarkan pedoman good farming practice guna mencapai produktivitas yang optimal. Penelitian ini bertujuan untuk untuk mengevaluasi kesesuaian pemeliharaan peternakan sapi breeding serta breedfat dengan standar good farming practice pada usaha peternakan rakyat desa Astomulyo, Kecamatan Punggur, Lampung Tengah. Kuesioner disusun berdasarkan Permentan 46/2015 meliputi aspek pembibitan dan reproduksi, pakan, pengelolaan, kandang dan peralatan, serta kesejahteraan ternak. Penilaian secara kualitatif dilakukan melalui metode observasi dan wawancara kepada 50 peternak di desa Astomulyo menggunakan rubrik penilaian berdasarkan aspek GFP dan dianalisis deskriptif menggunakan metode rating scale. Penerapan GFP di kedua jenis usaha (breeding dan breedfat) mendapatkan kategori kurang (>55%-75%), dengan skor performa terendah pada aspek pengelolaan (0,33/0,8) serta pembibitan dan reproduksi (0,35-0,42/0,8). Nilai performa GFP pada peternakan gabungan/breedfat lebih baik dari peternakan breeding, dengan persentase skor performa GFP berturut-turut 59,20% dan 58,07%., Commercial beef cattle farms over 100 heads, require professional management following good farming practices to achieve optimum productivity. Require professional management based on good farming practice guidelines to achieve optimal productivity. This study aims to assess whether the Good Farming Practice standard is suitable for smallholder farming businesses in Astomulyo Village, Punggur District, Central Lampung Regency. The study used a questionnaire based on Minister of Agriculture Number 46 of 2015 to evaluate aspects of breeding and reproduction, feed, management, cages and equipment, and animal welfare. The assessment was carried out through observation and interviews with 50 farmers and analyzed descriptively. The application of Good Farming Practices in both types of business (breeding and breedfat) was poor category (> 55%-75%), with the lowest performance score in the aspect of management (0.33/0.8), breeding and reproduction (0.35-0.42/0.8). However, the performance scores on combined/breedfat (breeding and fattening) farms (59.20%) were better than on breeding farms (58.07%).
Keyword: Breeding, Fattening, Good Farming Practice

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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