Judul: Karakteristik Produksi Sapi Lokal di RPH Ciawitali Kabupaten Garut Untuk Kebutuhan Pasar Tradisional
Abstrak: Daging sapi lokal merupakan salah satu sumber protein hewani yang digemari oleh masyarakat Indonesia. Pada umumnya, daging sapi lokal didapatkan dari pemotongan sapi di rumah pemotongan hewan (RPH). RPH Ciawitali merupakan salah satu RPH milik pemerintah Kabupaten Garut yang paling produktif. Tujuan dari penelitian ini untuk mengevaluasi produktivitas ternak dan karkas sapi lokal berdasarkan karakteristik produksi rumpun, jenis kelamin, umur, body condition score (BCS), bobot potong, bobot karkas dan persentase karkas yang diamati selama tiga minggu pemotongan. Penelitian ini menggunakan analisis deskriptif dan analisis one way ANOVA dengan uji lanjutan Duncan. Hasil penelitian menunjukkan sapi yang paling banyak dipotong adalah sapi Peranakan Limousin (42%), berjenis kelamin betina (74%), umur I2 (34%) dan memiliki skor BCS 3 (41%). Sapi lokal yang dipotong memiliki rataan bobot potong 371,438±93,54 kg, bobot karkas 162,693±50,40 kg serta persentase karkas 43,42±0,43%. Hasil menunjukkan produktivitas ternak dan karkas sapi yang dipotong masih rendah dan dibawah rataan produktivitas sapi nasional., Local beef is one of the most popular animal protein sources in Indonesia. Generally, local beef is obtained from slaughtering local cattle in abbatoirs. Ciawitali abbatoir is one of the most productive abbatoirs owned by the Garut Regency government. The objective of this study was to evaluate the productivity of cattle and carcasses of local cattle based on the production characteristics, which is the cattle’s breed, sex, age, body condition score (BCS), slaughter weight, carcass weight and beef yield observed during three weeks of slaughter. This study used decriptive analysis and one way ANOVA analysis with Duncan’s further test. The result showed that the most slaughteres cattle were Peranakan Limousin cattle (42%), female cattle (74%), age I2 (34%) and had BCS score 3 (41%). Local cattle slaughteres had an average slaughter weight of 371,438±93,54 kg, carcass weight of 162,693±50,40 kg and beef yield 43,42±0,43%. The results show that the productivity of local cattle slaughtered is still low and below the average national cattle productivity.
Keyword: Produktivitas, RPH, Sapi Lokal

Judul: Karakateristik SIstem Produksi dan Produk Sapi Potong di Peternakan Rakyat Desa kandang Mukti Kabupaten Garut
Abstrak: Usaha pekmakan sapi potong di Desa Kandang Mukti menrpakan safafi satu percontohnn peternakan rakyat di Jawa Barat. Kelompak ini memnfaatkan bakalan sapi jantan untuk tujuan penggemukan/pmbesaran yang dilakukan secara semi intensif dalam lahan terbatas dtngan jumlah papulasi relatif tinggi (lebih dari 375 ekor). Tujuan dari penelitian ini adalah untuk rnengidentifikasi sistem produksi dan produk yang dihasilkan sebagai dasar untuk merencanakan strategi pengembangan usaha sapi potong di Desa Kandang Mukti Kabupaten Garut.
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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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