Judul: Young Consumers Decision to Eat Organic Vegetables and Its Impact on Obesity and Immunity
Abstrak: The higher antioxidant content of organic vegetables compared to conventional vegetables is believed to reduce the risk of various diseases. However, it turns out that in Indonesia there are still many health problems due to people who do not consume healthy foods, one of which is organic vegetables. The purpose of this study is to analyze the factors that influence consumers in Jabodetabek in consuming organic vegetables and analyze the impact of organic vegetable consumption on obesity and endurance. The method used is binary logistics and Propensity Score Matching (PSM). This research was conducted using primary data with a total sample size of 256 respondents. The results of this study indicate that the factors that positively influence consumer decisions in Jabodetabek in consuming organic vegetables are motivational and lifestyle factors. The results also show that consuming organic vegetables has an impact on consumers Body Mass Index (BMI) and has no impact on consumers' endurance.
Keyword: consumption, impact, influencing factors, organic vegetables, Propensity Score Matching (PSM)

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: 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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