Judul: Kualitas Menu Makan Siang Kaitannya dengan Status Gizi dan Tingkat Kebugaran Siswa Sekolah Dasar di Kota Bogor
Abstrak: Indonesia is still facing nutrition problems which there are still many nutritional cases. Generally, malnutrition’s level of elementary school students in Indonesia ranges from 35% to 65%. The purpose of this study was to analyzed the quality of lunch menu in relation to nutritional status and fitness level of elementary school students in Bogor. The present study used a case study design with 40 students of elementary school. The data was processed with Microsoft Excel 2007 and analyzed with the Statistical Program for Social Science (SPSS) 16.0 for Windows. Generally, the quality of lunch menu in both groups of samples are in the category of less qualified and still need improvement to meet the balance nutrition. The result of this study showed that there was no significant relationship (p>0.1) between knowledge of nutrition, fitness levels, and the quality of lunch menu with nutritional status. However, there was a significant relationship (p<0.1) between the quality of lunch menu with fitness levels.
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Judul: Analisis Kualitas Makan Siswa Sekolah Dasar di Bogor serta Hubungannya dengan Status Gizi
Abstrak: Children’s diet quality becomes attention because of the poor quality diet in childhood is brought to adulthood and increasing the risk factor of chronic disease. The study aim to analyze children’s diet quality and its association to their nutritional status. The study design was cross sectional. Sample size was 111 by using purposive sampling. The collected data were individual characteristic, family characteristic, nutrition education, food habit, food consumption, and diet quality. Diet quality was measured by using Healthy Eating Index (HEI) with the approachment to Indonesian dietary guidelines. Data was analyzed by using chisquare and correlation Spearman. The mean of HEI score was 46 ± 7.0 and indicating need improvement diet quality. There was no significant association between individual and family characteristic with children diet quality (p>0.05). Higher HEI score were associated with lower energy intake, higher protein, carbohydrate, calcium, vitamin A, and vitamin C intakes (p<0.05). There was positive association children diet quality with nutritional status (p>0.05).
Keyword: school aged children., nutritional status, Healthy Eating Index, diet quality

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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