Judul: Correlation between Food Consumption, Iron Intake, and Physical Activity with the Nutritional Status of Female Adolescents at the Tarbiyatun Nisa Islamic Boarding School, Bogor Regency
Abstrak: Remaja memiliki tingkat konsumsi makanan padat energi, dan persentase makan buah dan sayuran yang rendah. Penelitian ini bertujuan untuk menganalisis hubungan antara konsumsi pangan, asupan zat besi, dan aktivitas fisik dengan status gizi remaja putri di Pondok Pesantren Tarbiyyatun Nisa Kabupaten Bogor. Penelitian ini dilaksanakan pada bulan Februari 2023 pada 87 subjek dengan desain studi cross sectional. Pengambilan data meliputi pengukuran tinggi badan, berat badan, wawancara, serta pengisian kuesioner yang meliputi biodata, karakteristik sosioekonomi keluarga, recall konsumsi pangan 2x24 jam, dan recall aktivitas fisik 2x24 jam. Sebagian besar subjek memiliki status gizi normal (73,6%). Rata-rata level aktivitas fisik subjek pada weekday sebesar 1,4 (ringan), sedangkan pada weekend sebesar 1,5 (ringan). Rata-rata tingkat kecukupan zat gizi subjek yaitu energi sebesar 84%, protein sebesar 83%, lemak sebesar 56%, karbohidrat sebesar 86%, zat besi sebesar 96%. Hasil penelitian menunjukkan bahwa aktivitas fisik dan status gizi remaja putri di Pondok Pesantren Tarbiyatun Nisa memiliki hubungan yang signifikan (p = 0,022; r = -0,671). Sementara itu, tidak terdapat hubungan signifikan antara tingkat kecukupan zat besi dengan status gizi, demikian pula tingkat kecukupan zat gizi lainnya dengan status gizi dan dengan aktivitas fisik (p > 0,050)., Adolescents have a high consumption of energy-dense foods, and a low proportion of fruits and vegetables. This study aims to analyze the relationship between food consumption, iron intake, and physical activity with the nutritional status of young women at the Tarbiyyatun Nisa Islamic Boarding School, Bogor Regency. This research was conducted in February 2023 on 87 subjects with a cross sectional study design. Data collection included measuring height, weight, interviews, and filling out questionnaires which included biodata, family socioeconomic characteristics, 2x24 hour food consumption recall, and 2x24 hour physical activity recall. Most of the subjects had normal nutritional status (73.6%). The average level of physical activity on weekdays is 1.4 (mild), while on weekends it is 1.5 (mild). The average level of nutritional adequacy of the subjects, namely energy by 84%, protein by 83%, fat by 56%, carbohydrate by 86%, iron by 96%. The results showed that physical activity and nutritional status of young women at the Tarbiyatun Nisa Islamic Boarding School had a significant relationship (p = 0.022; r = -0.671). Meanwhile, there was no significant relationship between the level of iron adequacy and nutritional status, as well as the level of adequacy of other nutrients with nutritional status and physical activity (p> 0.050).
Keyword: aktivitas fisik, asupan zat besi, konsumsi pangan, remaja putri, status gizi

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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