Judul: Faktor-faktor yang Mempengaruhi Keputusan Petani dalam Memilih Benih Unggul Kedelai di Kecamatan Bangsalsari Kabupaten Jember
Abstrak: Soybean is a rich source of protein with various derivatives of the soybean product which consumed by the Indonesian society. Seed is the part of the plant which from fertilized ovule is used for the purpose of cultivation, reaching maximum production. This study aim to identify the characteristics of consumers, analyze the purchase decision process, and analyze the factors that influence farmers' decisions in choosing seed in Bangsalsari distric, Jember. The method of this research is descriptive analysis and factor analysis. Descriptive analysis was used to describe the characteristics of consumer and the process of purchasing decision. Factor analysis was used to analyze the factors that influence the consumers purchasing decision. There were four major factors that influence the consumers purchasing that influence farmers decision in choosing superior soybean seed they were the influence of environment factor, the psychological process factor, learning factor and the product factor. Influence of environment factor was the main factor influencing the purchasing decision
Keyword: seed quality, purchasing decisions, factors analysis

Judul: Analisis sikap, kepuasan, dan loyalitas petani terhadap benih kedelai di Desa Sukasirna, Kecamatan Sukaluyu, Kabupaten Cianjur
Abstrak: Soybean is one of the most three important food after rice and corn. The purpose of this study was to identify the characteristics, decision-making processes, attitudes, satisfaction, and loyalty of farmers in the use of improved varieties of soybean seeds in the village Sukasirna. The method of analysis used in this study is descriptive analysis method, multiatribut Fishbein, Customer Satisfaction Index (CSI), Importance Performance Analysis (IPA) and Loyalty Pyramid. Based on Fishbein multiatribut obtained Dapros soybean seed is the seed of improved varieties preferred by farmers compared Grobogan and Orba. Based on Customer Satisfaction Index (CSI) has been obtained by the farmer respondents were satisfied with the performance of improved varieties of soybean seed attributes Dapros compared Grobogan and Orba. Based on the analysis of customer loyalty, loyal farmer respondents terdahap superior varieties of soybean seed Dapros compared Grobogan and Orba
Keyword: soybean., satisfaction, loyalty, behavior, Attitude

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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