Judul: Faktor-faktor yang Berhubungan dengan Konsumsi Buah dan Sayur Anak Usia Sekolah di Bogor.
Abstrak: Latar belakang penelitian ini adalah masih rendahnya konsumsi buah dan sayur, termasuk anak usia sekolah. Tujuan penelitian ini adalah menganalisis faktor-faktor yang berhubungan dengan konsumsi buah dan sayur pada anak usia sekolah dasar di Bogor. Desain penelitian ini adalah cross sectional dengan teknik penarikan contoh secara purposive sebanyak 108 contoh di dua sekolah dasar di Bogor yaitu SDN Cibanteng 01 Kabupaten Bogor dan SDN Papandayan Kota Bogor. Konsumsi buah dan sayur di SDN Papandayan lebih besar dibandingkan dengan SDN Cibanteng. Terdapat perbedaan yang nyata (p<0.05) konsumsi buah anak berdasarkan suku dan pekerjaan ibu. Terdapat perbedaan yang nyata (p<0.05) konsumsi sayur anak berdasarkan suku. Pengetahuan gizi anak dan pendidikan ayah dan ibu berhubungan signifikan positif (p<0.05) dengan konsumsi buah dan sayur anak, demikian pula uang saku, ketersediaan buah, dan pendapatan keluarga berhubungan signifikan positif (p<0.05) dengan konsumsi buah anak.
Keyword: konsumsi buah dan sayur anak, sosial-ekonomi

Judul: Konsumsi Buah dan Sayur pada Anak Sekolah Dasar menurut Status Sosial Ekonomi Berbeda di Kota Bogor
Abstrak: This research aim to examine the consumption of fruit and vegetable on elementary school children according to different socio-economic status in Bogor City. This research used the design of cross sectional study. Subjects taken in random who represents students who are registered in 20 elementary schools in Bogor City. There were no difference between the frequency of fruit and vegetable consumption of students in both groups of social economy. The contribution of vitamins A and C from fruit and vegetable consumption and the adequacy of the students were still low. There were no correlation between socio-economic families with the frequency of fruit and vegetable consumption, but there were a correlation between family size with vegetable consumption frequency, mother's education with the contribution of vitamin C in vegetable, and allowance with the contribution of vitamin C from vegetable consumption of students. There were no correlation between fruit and vegetable consumption frequency with the nutritional status of students.
Keyword: social economy, nutritional status, elementary school children, consumption of vegetable, consumption of fruit

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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