Judul: Perubahan Pengetahuan, Sikap dan Perilaku Jajan Anak Sekolah Melalui Penyuluhan Gizi di SDN Pasanggrahan 2, Purwakarta.
Abstrak: Nutrition education is an effort for people to obtain knowledge about nutrition. The aim of this study was to examine changes in knowledge, attitude of nutrition and food safety snacks and snack practice of school children through nutrition education. The study used a cross-sectional study design. A total number of 53 elementary school children in underdeveloped villages were selected out of 224 children by purposively. Data collected through questionnaires and interviews 2x24 hour recall method. There was a significant difference between pretest and posttest knowledge, attitude of nutrition and food safety knowledge (p<0.05), however there was no difference exist between snacks practices pretest and posttest. Snack food contributed energy (13,0%), protein (45,3%), vitamin A (1,4%), vitamin C (15,0%), calcium (5,3%), phosphorus (3,1%) and iron (15,9%) respectively. Street food contributed to the adequacy level of energy (9,0%), protein (55,9%), vitamin A (4,1% ), vitamin C (3,6%), calcium (1,8%), phosphorus (2,1%) and iron (9,5%) respectively.
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Judul: Pengaruh Pendidikan Gizi Terhadap Perubahan Pengetahuan Gizi dan Prilaku Konsumsi Pada Siswa Sekolah Dasar
Abstrak: The objectives of this study were to analyze the effect of nutritional education to nutritional knowledge and consumption behavior in elementary school students. This study used experimental study. Examples in this study were 128 children from four elementary schools. Processing and analyzing data used Microsoft Excell 2010 and the Scientical Program for Social Science (SPSS) version 16.0 for windows. Paired T-test results showed were not significant difference between energy intake before and after intervention (p=0.228; p>0.05). Similarly, for protein (p=0.720; p>0.05), calcium (p=0.080; p>0.05), iron (p=0.080; p>0.05), vitamin A (p=0.424; p>0.05), vitamin B (p=0.342; p>0.05), and vitamin C (p=0.248; p>0.05) showed no significant difference. Nutrients significantly different after the intervention is phosphor (p=0.039; p<0.05). There is an increase in consumption after the intervention, but the nutritional education cannot change the behavioural yet.
Keyword: Nutritional behaviour., Nutritional attitude, Nutritional knowledge

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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