Judul: Dampak Kenaikan Harga Daging Sapi terhadap Pola Konsumsi Pangan Sumber Protein Hewani di Kabupaten Bogor.
Abstrak: One kind of food which has important role in developing the food security and create human resources who has healthy quality is food animal proteins. The government is targeting food consumption of animal protein as much as 7.2 g/capita/ day in 2014. Food sources of animal protein can be derived from livestock or fishery products like ruminant meat, poultry, fish, eggs, and milk. This study aims to analyze the pattern of household consumption in Bogor Regency, analyze the level of demand elasticity, and perform simulations to analyze the impact of higher prices for meat. The data used comes from SUSENAS 2012 with 1125 households in Bogor Regency. The analytical method used was descriptive analysis and model of Almost Ideal Demand System (AIDS). The analysis showed that the type of ruminant meat consumption group was very inelastic and have a lower level of consumption than other animal protein foods. People in Bogor Regency consume more fish than ruminant meat. Increasing the prices of beef could make other public consumption for food source of animal proteins is down. Food protein consumption for the people of Bogor regency have met the target set by the government
Keyword: SUSENAS, inelastic, consumption patterns, animal protein, AIDS

Judul: Analisis Faktor-Faktor yang Mempengaruhi Jumlah Permintaan Konsumen Keluarga Terhadap Daging Sapi di Kotamadya Bogor, Jawa Barat
Abstrak: Sejalan dengan tujuan pemerintah dalam memenuhi kebutuhan masyarakat akan protein hewani maka peningkatan jumlah konsumsi protein hewani harus disertai pula dengan peningkatan produktivitas ternaknya. Salah satu ternak yang paling banyak menyumbangkan daging untuk memenuhi konsumsi protein hewani adalah ternak sapi. Tujuan penelitian adalah untuk mempelajari faktor-faktor yang mempengaruhi permintaan dan untuk mengetahui besar pengaruh faktor-faktor tersebut terhadap permintaan daging sapi oleh konsumen keluarga. Penelitian ini dilakukan di Kotamadya Bogor, Jawa Barat mulai tanggal 18 Agustus sampai dengan 28 September 1989. Penelitian dilakukan dengan menggunakan metode survey pada konsumen keluarga. Jumlah sampel adalah 43 rumah tangga yang semuanya merupakan ibu rumah tangga. Pengambilan sampel dilakukan dengan cara acak sederhana. Data di lapangan diperoleh dengan wawancara langsung dengan menggunakan daftar isian, sedangkan data penunjang diperoleh dari instansi atau lembaga yang terkait. Untuk mengetahui pengaruh tingkat pendapatan keluarga, harga daging sapi, harga barang substitusi, tingkat pendidikan penentu konsumsi, jumlah anggota keluarga dan selera terhadap daging sapi pada konsumen keluarga dipakai analisis regresi model Cobb-Douglas dan model Linier. Hasil penelitian dengan model Cobb-Douglas menunjukkan bahwa tingkat pendapatan keluarga dan harga barang substitusi sangat nyata (p<0.01) berpengaruh terhadap permintaan daging sapi oleh konsumen keluarga. Faktor harga daging sapi, tingkat pendidikan penentu konsumsi, jumlah anggota keluarga dan selera tidak berpengaruh nyata terhadap permintaan daging sapi.
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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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