Judul: Faktor-Faktor yang Mempengaruhi Keputusan Pembelian Petani dalam Memilih Benih Padi Bersertifkat PT SHS (Sang Hyang Seri) di Kabupaten Bogor
Abstrak: PT SHS is one of the companies that facing competition in the seed industry in Indonesia. The purpose of this research are: 1) to identify characteristics and decision-making process of purchasing seed certified by rice farmers, 2) to analyze the factors that influence the decision-making process of farmers, 3) determines the managerial strategy/marketing mix which right for the company. Based on interviews with 50 farmers selected by simple random sampling, shows that most of the farmers were middle-aged, with only past elementary school, own land holdings with an area of 0.8-3 hectares, and earn more than $ 9 million. The purchase decision making process by farmers based on their desire to obtain high rice iii productivity, information on certified seed retrieved most of the farmers through the stall saprotan, the main criteria into consideration in selecting the seed farmers rice is certified seed, and the seed quality that is certified is the most used by farmers is a brand of seeds from PT SHS, those purchasing is a done individually. Further analysis of the factors that affect farmers in the decision-making process of purchasing a certified padi seeds showed that the economic and the product is the most influences factor that affecting purchasing decisions by farmers where the primary variable of this factor is the quality of the seed. Therefore, the quality of the seed is a priority to be considered in order to win the competition.
Keyword: purchasing decision., consumer behavior, seed

Judul: Analisis Efektivitas Distribusi Benih Padi PT Sang Hyang Seri, Sukamandi, Subang, Jawa Barat.
Abstrak: Produksi padi yang meningkat mengakibatkan permintaan terhadap benih padi juga semakin meningkat. PT Sang Hyang Seri merupakan salah satu perusahaan yang bergerak di bidang perbenihan. Namun PT Sang Hyang Seri mengalami penurunan penjualan untuk produk benih padi. Penurunan penjualan terjadi karena banyaknya pesaing. Tujuan penelitian ini adalah menganalisis saluran distribusi dan menganalisis efektivitas distribusi yang digunakan oleh PT Sang Hyang Seri. Metode yang digunakan adalah dengan Importance and Performance Analysis (IPA) dan Customer Satisfaction Index (CSI). PT Sang Hyang Seri dinilai belum efektif dalam pendistribusian produk benih padi karena masih terdapat atribut yang harus diperbaiki. Nilai CSI dari perusahaan sebesar 89,19 persen dan 70,74 persen.
Keyword: benih, distribusi, efektivitas, kinerja, padi

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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