Judul: The Relationship between Fruit Vegetable Consumption Habits and Physical Activity with Nutritional Status and Physical Fitness of Students at SDN 1 Cijeungjing
Abstrak: Status gizi kurang dan lebih merupakan salah satu masalah gizi yang banyak dihadapi pada usia anak sekolah dasar. Status gizi dapat dipengaruhi oleh berbagai faktor seperti pengetahuan gizi, aktivitas fisik, kebugaran, dan kebiasaan makan. Tujuan penelitian ini adalah menganalisis hubungan kebiasaan konsumsi sayur dan buah serta aktivitas fisik dengan status gizi dan kebugaran jasmani siswa di SDN 1 Cijeungjing. Penelitian ini dilaksanakan pada bulan Oktober-November 2022 pada 58 subjek dengan desain cross sectional study. Pengambilan data dilakukan melalui pengukuran tinggi badan dan berat badan, wawancara, harvard step test, pengisian kuesioner meliputi karakteristik subjek dan keluarga, PAQ-C (Physical Activity Questionnaire for Children), dan FFQ (Food Frequency Questionnaire). Sebagian besar subjek berjenis kelamin laki-laki (72,4%) dengan status gizi normal (79,3%). Hasil analisis menunjukkan terdapat hubungan yang signifikan (p<0,05) antara kebiasaan konsumsi sayur dan buah dengan aktivitas fisik (p-value=0,050;r=-0,129). Terdapat hubungan yang signifikan (p<0,05) antara aktivitas fisik dengan kebugaran jasmani (p-value=0,029;r=0,288). Namun, tidak terdapat hubungan yang signifikan (p>0,05) antara kebiasaan konsumsi sayur dan buah dengan status gizi (p-value=0,338;r=0,128). Tidak terdapat hubungan yang signifikan (p>0,05) antara aktivitas fisik dengan status gizi (p-value=0,142;r=0,195). Tidak terdapat hubungan yang signifikan (p>0,05) antara kebiasaan konsumsi sayur dan buah dengan kebugaran jasmani (p-value=0,333;r=-0,129)., Underweight and overweight are one of the most common nutritional problems faced by elementary school children. Nutritional status can be influenced by various factors such as nutritional knowledge, physical activity, fitness, and eating habits. The aim of this study was to analyze the relationship between fruit vegetable consumption habits and physical activity with the nutritional status and physical fitness of students at SDN 1 Cijeungjing. This study was conducted in October-November 2022 on 58 subjects with a cross-sectional study design. Data collected by measuring height and weight, interviews, harvard step test, filling out questionnaires including subject and family characteristics, PAQ-C questionnaire (Physical Activity Questionnaire for Children), and FFQ questionnaire (Food Frequency Questionnaire). Most subjects were male (72.4%) with normal nutritional status (79.3%). The results of the analysis showed that there was a significant correlation (p<0.05) between fruit vegetables consumption habits with physical activity (p-value=0.050;r=-0.129). There was significant correlation (p<0.05) between physical activity with physical fitness (p-value=0.029;r=0.288). However, there was no significant correlation (p>;0.05) between fruit vegetables consumption habits with nutritional status (p-value=0.338;r=0.128). There was no significant correlation (p>0.05) between physical activity with nutritional status (p-value=0.142;r=0.195). There was no significant correlation (p>0.05) between fruit vegetables consumption habits with physical fitness (p-value=0.333;r=-0.129).
Keyword: fruit vegetables consumption habits, nutritional status, physical  activity, physical fitness

Judul: Correlation between Consumption of Supplement, Consumption of Fruits and Vegetables and Physical Activity with Health and Nutritional Status of Female Adolescents
Abstrak: Remaja mengalami pertumbuhan fisik yang cepat sehingga kebutuhan gizi remaja relatif tinggi. Suplemen dibutuhkan untuk menunjang kesehatan dan memperkuat daya tahan tubuh. Konsumsi buah dan sayur sebagai sumber vitamin dan mineral serta aktivitas fisik mempengaruhi status kesehatan dan status gizi remaja. Penelitian ini bertujuan menganalisis hubungan konsumsi suplemen, konsumsi buah dan sayur serta aktivitas fisik dengan status kesehatan dan status gizi remaja putri. Desain penelitian adalah cross sectional study dengan subyek berjumlah 60 orang yang dipilih secara purposive sampling. Pengumpulan data dilakukan melalui google form dan wawancara melalui telepon. Hasil penelitian menunjukkan sebanyak 91,6% subyek terkategori sering mengonsumsi suplemen. Sebanyak 96,7% subyek terkategori kurang mengonsumsi buah dan sayur. Sebanyak 60% subyek terkategori sangat ringan melakukan aktivitas fisik. Tidak ada perbedaan signifikan (p>0,05) konsumsi suplemen, konsumsi buah dan sayur serta status kesehatan antara subyek gizi lebih dengan normal namun aktivitas fisik subyek gizi lebih adalah signifikan (p<0,05) lebih rendah daripada subyek gizi normal. Hasil uji korelasi menunjukkan tidak terdapat hubungan signifikan (p>0,05) antara konsumsi suplemen, konsumsi buah dan sayur serta aktivitas fisik dengan status kesehatan. Hasil uji korelasi menunjukkan tidak terdapat hubungan signifikan (p>0,05) antara konsumsi suplemen, konsumsi buah dan sayur, aktivitas fisik dan status kesehatan dengan status gizi., Adolescents experience rapid physical growth so that the nutritional needs relatively high. Supplements are needed to support health and strengthen the immune system. Fruits and vegetables as source of vitamin and mineral, and physical activity affect health and nutritional status. Research aimed to analyze correlation between consumption of supplement, consumption of fruits and vegetables, and physical activity with health and nutritional status. This cross-sectional study design consisted of 60 subjects was selected by purposive sampling. Data collected via google forms and interviews by telephone. This study found 91.6% of subjects were categorized as frequently taking supplement. Most (96.7%) of subjects had a low category for consumption of fruits and vegetables. As much as 60% of subjects had very light category of physical activity. There was no significant difference (p>0.05) in consumption of supplement, consumption of fruits and vegetables, and health status between overweight and normal subjects. Physical activity of overweight was significant (p<0.05) lower than normal subjects. There was no significant correlation between consumption of supplement, consumption of fruits and vegetables, and physical activity with health status. There was no significant correlation between consumption of supplement, consumption of fruits and vegetables, physical activity and health status with nutritional status.
Keyword: consumption of fruits and vegetables, consumption of supplement, health status, nutritional status, physical activity

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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