Judul: Correlation between Picky Eating Behavior and Nutrition Knowledge with Diet Quality among IPB University Students
Abstrak: Penerapan pola makan yang kurang tepat pada kelompok dewasa awal umumnya disebabkan karena adanya preferensi dan kekuatan yang terbentuk dalam menentukan pilihan makanan berkaitan dengan berbagai faktor yang dapat berakibat pada risiko ketidakseimbangan asupan sesuai dengan rekomendasi. Tujuan dari penelitian ini adalah menganalisis hubungan antara perilaku picky eating dan pengetahuan gizi dengan kualitas diet mahasiswa IPB University. Kualitas diet diukur menggunakan Indonesian Healthy Eating Index (I-HEI), perilaku picky eating diukur dengan Adult Picky Eating Questionnaire (APEQ), dan pengetahuan gizi diukur dengan kuesioner terstruktur. Penelitian ini menggunakan desain cross-sectional study yang melibatkan 70 subjek mahasiswa sarjana IPB University kampus Dramaga, Kabupaten Bogor. Pengumpulan data dilakukan melalui wawancara, dan pengisian kuesioner secara langsung. Rata-rata skor I-HEI subjek adalah 51,4, The implementation of an inappropriate diet in early adulthood is generally due to the preferences and strengths formed in determining food choices related to various factors that may cause the risk of imbalance nutritional intake in accordance with recommendations. This study aims to analyze the correlation between picky eating behavior and nutritional knowledge with diet quality among IPB University students. Diet quality is measured using the Indonesian Healthy Eating Index (I-HEI), picky eating behavior is measured with the Adult Picky Eating Questionnaire (APEQ), and nutritional knowledge was measured with a structured questionnaire. The cross sectional study design is conductedwith 70 subjects of IPB University’s undergraduate students in Dramaga campus, Bogor Regency. Data collection is conducted through interviews, and self-administered questionnaire. The average I-HEI score of the subjects was 51.4
Keyword: kualitas diet, pengetahuan gizi, I-HEI, picky eating

Judul: Analisis Kualitas Diet serta Hubungannya dengan Densitas Energi Konsumsi dan Pengetahuan Gizi Mahasiswa IPB
Abstrak: The purpose of this study was to analyze diet quality and its correlation with energy density consumption and nutritional knowledge of Bogor Agricultural University Students. The design of this study was cross sectional study with amount of subject were 40 Nutrition Community students and 40 Forest Management students from Bogor Agricultural University. The food consumption data was collected through Semi Quantitative Food Frequency Quesstionary (SQ-FFQ) and Recall 2 x 24 hours. There were 62.5% Nutrition Community students and 75% Forest Management students have low diet quality based on DQI-I (Diet Quality Index-International) score. The result of Pearson test showed that energy density consumption had negative correlation with diet quality (P<0.05), while there was not significant correlation between diet quality and nutritional knowledge based on Spearman test. There were positive correlation between diet quality and intake of energy, carbohydrate, dietary fiber, vitamin C, calcium, and iron based on Spearman test (p<0.05).
Keyword: Bogor Agricultural University, diet quality, energy density consumption, IPB students, 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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