Judul: Analisis Faktor dan Proses Pengambilan Keputusan Pembelian Sayuran Organik di Yogya Bogor Junction
Abstrak: Healthy lifestyles be sensitive issues in the food industry. People realize that the use of chemicals non-natural, in agricultural production turns out to have a negative impact on human health and the environment. A factor of health being one of the reasons why consumers, consume organic food one of them by ingestion of organic vegetables. Research aimed at analyzing characteristic of consumers, the process of a decision to buy organic vegetables and factors that affects consumers in buying vegetables organic in yogya bogor junction. A method of a base on this research using descriptive analysis and factor analysis. Based on research, in the process of a decision to buy organic vegetables consumers motivated because it has rich benefit and not have to worry about the chemical content. A source of information obtained from relation good friends and family. An attribute that considered namely freshness organic vegetables. Purchase in a planned and most consumers after consume organic vegetables in yogya bogor junction satisfied. There are five groups of factors in the purchasing decision of organic vegetables namely physical factors, environmental factor, individual background factors, the appeal of the product and external factors
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Judul: Analisis Keputusan Pembelian Buah Segar di Yogya Bogor Junction
Abstrak: Yogya Bogor Junction, as a modern retailer providing fresh fruits, is the object in this research that aims to analyze the factors that influence consumers’ behavior on making their decisions to buy fresh fruits. In general, fruits consumers at Yogya Bogor Junction consist of mostly married women with monthly expenses from Rp. 4,000,001 to Rp. 6,000,000. The analysis result of the factors can be classified into at least two factors each for both local and imported fruits. From the study, it is discovered that there are several steps into the consumers’ decision to buy either local or imported fruits in respect to their needs. In gathering information, most consumers rely more on themselves and in an alternative evaluation; the decisive factor is the store’s proximity to consumers’ house regardless of price dynamics. Lastly, consumers’ final decision is also related to their situation in the sense of product availability (supply). After purchasing fruits, most consume the fruits immediately in satisfaction and are mostly encouraged to keep purchasing as long as their expectations are fulfilled satisfyingly.
Keyword: Factors Analysis., Purchase Decision, Consumers Choice, Yogya Bogor Junction, Fresh Fruits

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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