Judul: Pengetahuan Gizi, Kebiasaan Makan, Konsumsi Minuman Manis, Tingkat Kecukupan Gizi, dan Status Gizi Mahasiswa IPB University.
Abstrak: Penelitian ini bertujuan untuk menganalisis pengetahuan gizi, kebiasaan makan, konsumsi minuman manis, dan tingkat kecukupan energi dan zat gizi dengan status gizi pada mahasiswa IPB University. Desain penelitian ini adalah cross sectional study dengan melibatkan 46 mahasiswa berstatus gizi normal dan 46 mahasiswa berstatus gizi gemuk/obesitas. Sebagian subjek memperoleh tingkat pengetahuan gizi rendah (50%), skor kebiasaan makan rendah (81,5%), asupan energi minuman manis sedang (45,7%), frekuensi konsumsi minuman manis sering (75%), dan tingkat kecukupan energi (76,1%), protein (68,5%), lemak (67,4%), dan karbohidrat (78,3%) kurang. Terdapat perbedaan yang signifikan antara kelompok status gizi normal dan gemuk pada variabel asupan energi minuman manis dan frekuensi konsumsi minuman manis (p<0,05). Uji korelasi menunjukkan terdapat hubungan yang signifikan antara frekuensi konsumsi minuman manis, tingkat kecukupan protein dan lemak dengan status gizi (p<0,05). Hasil uji regresi menunjukkan secara keseluruhan terdapat pengaruh antara frekuensi konsumsi minuman manis terhadap status gizi., This study aims to analyze the nutritional knowledge, eating habits, consumption of sweetened beverages, energy and nutrients adequacy level with the nutritional status of IPB University students. The design of this study was cross sectional study involved 46 students with normal nutritional status and 46 students with overweight/obese nutritional status. Most subject has low nutritional knowledge (50%), low eating habits’ score (81,5%), moderate energy intake of sweetened beverages (45,7%), high frequency of sweetened beverages consumption (75%), and low adequacy level of energy (76,1%), protein (68,5%), fat (67,4%) dan carbohydrate (78,3%). There was a significant difference of normal and overweight/obese students in energy intake of sweetened beverages and frequency of sweetened beverages consumption (p<0,05). There was a significant correlation between frequency of sweet beverages consumption, adequacy level of protein and fat with nutritional status (p<0,05). Regression test result showed over all there was an effect in frequency of sweetened beverages consumption to nutritional status.
Keyword: nutrient adequacy level, nutritional statu, sweetened beverages

Judul: Keragaan Tingkat Keanekaragaman Konsumsi Pangan, Tingkat Kecukupan Gizi, dan Status Gizi Mahasiswa Gizi IPB.
Abstrak: Penelitian ini bertujuan untuk menganalisis tingkat keanekaragaman konsumsi pangan, tingkat kecukupan gizi, dan status gizi mahasiswa Program Studi Ilmu Gizi IPB. Desain penelitian yang digunakan adalah cross sectional study dengan menggunakan data primer. Subyek dalam penelitian ini adalah mahasiswa Program Studi Ilmu Gizi IPB semester 6 yang berjumlah 98 orang. Hasil penelitian menunjukkan bahwa separuh dari contoh memiliki tingkat keanekaragaman konsumsi pangan yang tergolong ke dalam kategori tinggi. Tingkat kecukupan energi, protein, lemak, besi, kasium, dan vitamin C contoh tergolong defisit berat, namun tingkat kecukupan karbohidrat dan vitamin A-nya tergolong sudah cukup. Status gizi contoh sebagian besar tergolong normal. Hasil uji hubungan menunjukkan adanya hubungan signifikan positif antara tingkat keanekaragaman konsumsi pangan dengan tingkat kecukupan gizi dan status gizi contoh.
Keyword: tingkat keanekaragaman konsumsi pangan, tingkat kecukupan gizi, status gizi

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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