Judul: Karakteristik Pangan Jajanan Anak Sekolah Dasar di Indonesia
Abstrak: The healthy level of food in elementary school could be the one of main obstacle for Indonesia to develop human resources in the future. Observation in periodic time must be done to minimalize the negative affect. National Agency of Drugs and Foods Control has already made a survey to collect detail of elementary school children food which sold in the school. The purpose of this research are (1) To explained the characteristics of elementary school children food in Indonesia; (2) To identify the food which not eligible to consume by elementary school children. This survey had been done in February till Mei 2012. Based on 7207 samples, fried food was the most and then followed by snacks, ice, noodles, meatballs, softdrink, and jelly. From these sample, testing of parameters was carried out to determine whether certain elementary school children food eligible to consume or not. Test results showed that there was food not eligible to consume by elementary school children because of excessive food additives and microorganism contamination. The main caused of elementary school children food becomed ineligible for ice, jelly, and softdrink was cyclamate. Meatballs and fried food were indicated contaminating by high bacterial based on total plate count testing parameter. Noodles were known containing any preservatives such as formaldehyde and snacks contained borax. Biplot analysis showed that Papua Maluku region have the highest number of ineligible elementary school children food and risk substance for ice, jelly, fried food, snacks, and noodles.
Keyword: elementary school children food, biplot analysis

Judul: Penilaian Kantin Sehat Pangan Jajanan Anak Sekolah di Kota Depok
Abstrak: In order to promote the consumption of healthy food, Depok health service held a healthy canteen program assessments undertaken annually and coorporated with Bogor Agricultural University and National Agency of Drugs and Foods Controls. The healthy canteen assessment was consist of chemistry and microbiological analyses on food snacks sold in school canteens and also the aspects of physical building conditions. Canteen assessment was followed by 11 elementary schools, each school represented subdistrict. Heavy metals contamination analysis which was plumbum, food addictive which was cyclamate acid, and hazardous material such as formaline, borax, rhodamine B and methanil yellow. Microbiological analysis of E.coli and Salmonella. Healthy canteen assessment using the reduction value system was done if the parameters analyzed were detected. SD A4, A7, A8, SD and SD A11 earned the highest score,while SD A2 and A10 earned the lowest score.
Keyword: school, healthy canteen, food

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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