Judul: Program Evaluasi Pemberian Pakan Sapi Perah Untuk Tingkat Peternak dan Koperasi Menggunakan Microsoft Access.
Abstrak: Akhir-akhir ini permintaan akan produk peternakan semakin meningkat seiiring dengan bertambahnya jumlah populasi manusia dan kesadaran orang-orang terhadap pentingnya pangan bergizi. Susu merupakan produk peternakan yang bergizi dan memiliki nilai ekonomi tinggi. Namun tingkat produksi dan kualitas susu tergantung pada status nutrisi ternak yang menghasilkannya. Komputer dapat dimanfaatkan untuk menganalisa kondisi ternak sapi perah secara akurat dan efisien. Pada penelitian ini, sebuah program komputer dibuat menggunakan Microsoft Access dengan tahapan analisa sistem, desain solusi, uji program dan implementasi program.
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Judul: Program Evaluasi Pemberian Pakan Sapi Perah Untuk Tingkat Peternak Dan Koperasi Menggunakan Microsoft Access
Abstrak: The demand on animal products increases in line with the increase in human population and their awareness on their nutritive value. Milk is a highly nutritive animal product which has high economic value. However, milk yield and its nutritive value are influenced by the nutritional status of the cows. Computer can be used as a tool to evaluate efficiently and accurately the nutritional status of dairy herd. In the present study, a computer program was developed using Microsoft Access by analyzing system, creating solution design, test and implementation program. System analysis and solution design were used to evaluate the nutrient requirement and reproduction status of the animal by entering the data of farmer identity (name, date and place of birth, education status, start of farming, animals ownership and address), animal identity (code, date of birth, physiology status body score and body weight), feeding aspects (feeding and nutrient requirement), and animal reproduction status (age at first calving, lactation period, lactation month and daily milk yield). The available data was used to evaluate the developed program. The output of the program indicated the ownership of the animal, population, nutritional and physiological status and milk yield. Key words: program, cows, feed, milk, farmer, cooperative
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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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