Judul: Faktor-faktor yang Mempengaruhi Perilaku Konsumsi Pangan Organik pada Kelompok Vegetarian di Kota Bogor
Abstrak: Trend of healthy lifestyle is increasing in modern society. Healthy lifestyle becomes one of quality standards. One of the efforts to live a healthy lifestyle has been practised in Indonesia, including by introduce organic foods. Studies about organic food consumption in Indonesia are still limited. The purpose of this study was to determine the factors associated with behavior of organic foods consumption among vegetarian in Bogor City. The method used in this study was cross sectional design with 42 vegetarians as study participants. The study was conducted in August until September 2014. Data were collected using questionnaire and Food Frequency Questionnaire (FFQ). The data analysis was performed using univariate analysis for frequency distributions, bivariate analysis for Chi Square test, and double logistic regression test with prediction model. The study results shout that factors related to organic food consumption behavior in vegetarian were age, gender, education, income, and knowledge (Pvalue < 0.05 ). Further more, the variables that were not associated in this study were the number of family member, job, and illness history. The most dominant factor was the income.
Keyword: Bogor Agricultural University (IPB), vegetarian, consumption, organic food, healthy lifestyle

Judul: Pola Konsumsi dan Status Gizi pada Kelompok Vegetarian di Kota Bogor
Abstrak: The objective of this study was to analyze consumption patterns and nutritional status of vegetarian groups in Bogor. The study used cross sectional design and study participants were recruited purposively. The number of subjects was 42 vegetarian consisted of 22 men and 20 women. The result showed that nutritional adequacy level of energy of the vegetarian groups experienced deficiency of men (50%) and women (60%). Nutritional adequacy level of protein of the vegetarian groups of men experienced deficient (59%) and women (65%). Nutritional adequacy level of fat of the vegetarian groups experienced a shortage of men (52%) and women (48%). Nutritional adequacy level of carbohydrates of the vegetarian groups were good of men (64%) while women were deficient (75%). Nutritional adequacy level of vitamins and minerals of the vegetarian groups experienced a shortage of men (100%) and women (100%). The Spearman statistical analysis showed that there was no correlation (p>0.05) between type of vegetarian (vegan, lacto vegetarian vegetarian dan lacto-ovo vegetarian vegetarian) and old vegetarian with the level of recommended dietary allowance.
Keyword: vegetarian, the level of recommended dietary allowance, nutritional status

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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