Judul: Penerapan Kesejahteraan Hewan Pada Peternakan Sapi Pedaging di Kecamatan Jonggol Kabupaten Bogor Jawa Barat
Abstrak: Peternakan sapi pedaging di Indonesia umumnya berskala kecil, dikelola secara tradisional, serta tidak diimbangi manajemen dan permodalan yang baik. Rendahnya pengetahuan dan pemahaman peternak mengakibatkan terabaikannya kesejahteraan hewan. Kesejahteraan hewan harus diperhatikan karena berpotensi meningkatkan produksi dan produktivitas sapi potong. Konsep lima kebebasan (five freedoms) digunakan sebagai acuan dalam mengevaluasi penerapan kesejahteraan hewan. Penelitian ini bertujuan menilai penerapan kesejahteraan hewan di peternakan sapi pedaging di Kecamatan Jonggol, Jawa Barat. Wawancara dan observasi menggunakan kuesioner dilakukan terhadap 32 peternakan rakyat. Data dianalisis menggunakan analisis deskriptif kuantitatif. Hasil penelitian menunjukkan upaya penerapan kesejahteraan hewan dikategorikan kurang dengan penerapan sebesar 51,56%. Aspek bebas, lapar, dan haus menjadi aspek yang terendah penerapannya (44,53%) sehingga diperlukan perhatian lebih. Aspek dengan penerapan dalam kategori cukup, dapat ditingkatkan melalui peningkatan pengetahuan dan kesadaran peternak untuk meningkatkan produktivitas ternak., Beef cattle farming in Indonesia is generally small-scale, managed traditionally, and lacks proper management and financing. The low knowledge and understanding of farmers have resulted in the neglect of animal welfare. Animal welfare must be considered as it has the potential to enhance beef cattle production and productivity. The concept of the five freedoms is used as a reference to evaluate the implementation of animal welfare. This research aims to assess the application of animal welfare in beef cattle farming in Jonggol District, West Java. Interviews and observations using a questionnaire were conducted with 32 small-scale farms. The data were analyzed using quantitative descriptive analysis. The results of the research indicate that the efforts to implement animal welfare are categorized as inadequate, with an implementation rate of 51,56%. The aspects of freedom from hunger and thirst were found to have the lowest implementation rate (44,53%), requiring more attention. Aspects categorized as sufficient can be improved through increasing farmers' knowledge and awareness to enhance livestock productivity.
Keyword: kesejahteraan hewan, lima kebebasan, peternakan sapi pedaging, animal welfare, beef cattle farm, five freedoms

Judul: Evaluasi Penerapan Good Farming Practice pada Peternakan  Rakyat Sapi Potong di Situ Bolang Indramayu
Abstrak: Produktivitas ternak sapi potong domestik belum cukup untuk memenuhi kebutuhan dalam negeri. Sebanyak 90% peternakan sapi di Indonesia dikelola secara tradisional. Penelitian bertujuan mengevaluasi pengelolaan peternakan sapi potong di Peternakan Situ Bolang sesuai Peraturan Menteri Pertanian Republik Indonesia Nomor 46/Permentan/PK.210/8/2015 tentang Good Farming Practice untuk Sapi Potong. Penelitian menggunakan analisis deskriptif kualitatif wawancara kepada 33 responden menggunakan kuesioner dan pengamatan secara langsung. Hasil penelitian dapat dilihat dari nilai aspek Good Farming Practice yaitu pembibitan dan reproduksi, manajemen pakan, tata laksana pemeliharaan, perkandangan, dan kesejahteraan ternak. Penerapan GFP oleh peternak rakyat di Situbolang Indramayu mendapatkan nilai 2,05 tergolong dalam kategori sangat kurang., Domestic beef cattle productivity is not sufficient to meet domestic demand. As many as 90% of cattle farms in Indonesia are managed traditionally. The study aimed to evaluate the management of beef cattle farming in Situ Bolang Farm according to the Regulation of the Minister of Agriculture of the Republic of Indonesia Number 46/Permentan/PK.210/8/2015 about Good Farming Practice for Beef Cattle. The study used descriptive qualitative analysis of interviews with 33 respondents using questionnaires and direct observation. The results of the study can be seen from the value of aspects of breeding and reproduction, feed management, rearing procedures, cowshed, and animal welfare. Implementation of GFP by smallholder farmers in Situbolang Indramayu received a score of 2.05, which is classified as very lacking.
Keyword: beef catle, community farm, 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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