Judul: Hubungan status antropometri dan vitamin A dengan status imun siswa sekolah usia 7-9 tahun di Cibeber, Leuwiliang kabupaten Bogor
Abstrak: Defisiensi vitamin A merupakan penyebab kebutaan yang paling sering dijumpai pada anak-anak dan membuat 250.000-500.000 orang anak meninggal dunia. Lebih kurang 150 juta anak lain mengalami kematian dalam usia anakanak akibat penyakit infeksi yang antara lain akibat status vitamin A yang tidak memadai (Ahmed dan Darnton 2008). Defisiensi Vitamin A berhubungan dengan penurunan imunitas dan peningkatan infeksi. Defisiensi zat gizi mikro juga dapat menyebabkan kehilangan berat badan, kegagalan tumbuh kembang pada anak dan penyebab penurunan cadangan zat gizi yang berpengaruh terhadap penurunan imunitas (Tomkins dan Watson 1993). Tujuan umum penelitian ini adalah untuk mengetahui hubungan antara status antropometri dan status vitamin A dengan status imun siswa sekolah dasar (usia 7-9 tahun) di Cibeber, Leuwiliang Kabupaten Bogor. Tujuan khusus penelitian ini menganalisis: (1) hubungan status antropometri dengan status vitamin A anak; (2) hubungan status vitamin A dengan status imun anak; (3) hubungan status imun dengan morbiditas anak; serta (4) hubungan morbiditas dengan status gizi berdasarkan antropometri anak.
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Judul: Asupan Vitamin A, Status Vitamin A, dan Status Gizi Anak SD di Kecamatan Leuwiliang, Kabupaten Bogor
Abstrak: Growth in human life is influenced by various factors, one of them is nutrient intake. Nutrient intake still a problem that affects the quality of human resources. The objective of this research was to study the intake of vitamin A, vitamin A status, and nutritional status of primary school children in Leuwiliang Sub-District, Bogor Regency. There were 31 children grade 2 and 3 in SD Angsana I and II Cibeber Village selected by purposive sampling technique. The results showed that more than half of the children had medium sufficient levels of vitamin A (54.8 %) with mean value levels of vitamin A 112.3%. Generally, they had normal nutritional status (93.5%). More than half of children had low vitamin A status (58.1%) with mean value retinol serum is 10.7 μg/dl . The result also found that relationship between the level of adequacy of energy and protein with nutritional status of the children were not significant (p>0.05). The relationship between intake of vitamin A to vitamin A status also showed no significant relationship (p>0.05). It was presumably due to the presence of other factors (reserves of vitamin A in the liver). There was no significant relationship between vitamin A status and nutritional status (p>0.05). It was presumably due to the presence of other factors (food consumption, socio-economic and disease factors) affected nutritinal status.
Keyword: school-age children vitamin A consumption, energy and protein consumption

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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