Judul: Analisis Kesediaan Membayar (Willingness to Pay) Produk Healthy Nama NIM FoodBeras Merah Pulen di Serambi Botani, Botani Square, Bogor
Abstrak: Beberapa tahun terakhir ini, konsumsi beras merah dipopulerkan sebagai bagian dari gaya hidup sehat. Beras merah dengan konsep healthy food merupakan salah satu produk dari Serambi Botani. Penelitian ini bertujuan untuk menunjukkan adanya hubungan karakteristik responden dengan kesediaanya membayar, mengetahui nilai rataan kesediaan membayar, dan mengetahui faktor yang mempengaruhi pengunjung terhadap harga maksimal yang sanggup dibayarkan untuk produk healthy food beras merah pulen. Hasil dari penelitian ini yaitu hubungan karakteristik responden dan kesediaannya dalam membayar mayoritas berjenis kelamin perempuan dengan usia separuh baya yang memiliki jumlah anggota keluarga kecil dan berpendidikan terakhir strata 1 serta bekerja sebagai pegawai swasta berpenghasilan > Rp 7 500 000. Nilai rataan maksimum WTP untuk produk healthy food beras merah pulen adalah sebesar Rp 33 350 per satu kilogram dengan standar deviasi sebesar Rp 13 000. Faktor yang paling mempengaruhi responden dalam mengestimasi nilai WTP adalah jumlah anggota keluarga dan kepedulian terhadap pangan sehat dan bergizi.
Keyword: beras merah, contingent valuation method, willingness to pay

Judul: Analisis Kesediaan Membayar (Willingness To Pay) Sayuran Organik dan Faktor - Faktor yang Mempengaruhinya (Studi Kasus Kota Bogor, Jawa Barat)
Abstrak: The era of modernization and the increasing in GDP per capita have changed the consumer behavior of Indonesian people. Indonesian people realize the importance of healthy living by consuming organic vegetables. The increasing production cost as a result of improving product quality induced the selling price of organic vegetables in market. This research aims to identify customer characteristics who made a purchase on organic vegetables by using descriptive analysis, to estimate consumer willingness to pay (WTP) using Contingent Valuation Method (CVM) and to analyze factors that influence the Willingness To Pay using Structural Equation Modeling (SEM) with LISREL. The result of this research showed the mean of maximum WTP for cabbage commodity is Rp 18.738; lettuce is Rp 30.048; broccoli is Rp 40.250; chinese cabbage (bok choy) is Rp 24.368 and carrot is Rp 19.820. The attitude and obstacle effect on WTP is significant, while the effect of SES is not significant.
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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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