Judul: Analisis Sikap Konsumen dan Sensitivitas Harga Terhadap Jeruk Nama NIM. Medan dan Jeruk Mandarin di Y ogya Bogor Junction
Abstrak: Orange is one of fruits that have a lot of varieties in Indonesia. Free trade system make the Government cannot do much to tackle increase import oranges. The inclusion of orange mandarin to Indonesia made the consumers have a choice between consuming medan orange or mandarin orange. The methods used in this research is a descriptive analysis, multiatribut fishbein, and price sensitivity. The majority consumers of orange are woman, married, bachelor, age ≥ 36 years, worked as housewife and have income Rp 2 600 000 – Rp 5 000 000. Based on fishbein analysis, respondent prefer attribute on an mandarin orange. Range price of medan oranges is Rp 36 000 – Rp 45 000. Range price of mandarin orange is Rp 33 000 – Rp 47 500
Keyword: Bogor Agricultural University (IPB), Price sensitivity, Multiatribute Fishbein, ConsumerAttitudes

Judul: Analisis Sikap Konsumen Terhadap Jeruk Malang dan Jeruk Mandarin di Pasar Tradisional Kabupaten Malang.
Abstrak: Jeruk merupakan salah satu buah yang memiliki banyak varietas di Indonesia. Berlakunya sistem perdagangan bebas membuat pemerintah tidak bisa berbuat banyak untuk menanggulangi terjadinya peningkatan impor jeruk. Masuknya Jeruk Mandarin ke Indonesia membuat konsumen memiliki pilihan antara mengonsumsi Jeruk Mandarin atau Jeruk Malang. Penelitian ini ditujukan untuk mengetahui karakteristik konsumen dan sikap konsumen Jeruk Malang terhadap Jeruk Mandarin. Metode yang digunakan pada penelitian ini adalah analisis deskriptif dan analisis multiatribut fishbein. Mayoritas konsumen jeruk adalah perempuan, menikah, pendidikan akhir SMA, berusia 26-45 tahun, bekerja sebagai ibu rumah tangga, dan memiliki pendapatan Rp 2 000 000 – Rp 5 000 000. Berdasarkan analisis fishbein, responden lebih menyukai atribut pada Jeruk Mandarin daripada Jeruk Malang.
Keyword: Sikap Konsumen, Jeruk Malang, fishbein

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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