Judul: Analisis Konsumsi Pangan Hewani, Tingkat Pemenuhan Gizi, dan  Status Gizi Siswa SD di Cijeruk, Bogor
Abstrak: Konsumsi pangan hewani yang banyak mengandung protein, vitamin dan mineral masih tergolong rendah terutama pada siswa sekolah dan remaja. Penelitian ini bertujuan untuk menganalisis konsumsi pangan hewani, tingkat pemenuhan gizi dan status gizi siswa sekolah dasar di Cijeruk, Kabupaten Bogor. Desain penelitian cross-sectional study dengan data sekunder pada 915 siswa dari 16 SD di Cijeruk, Kabupaten Bogor pada tahun 2019. Data konsumsi pangan terutama pangan hewani melalui food recall 3×24 jam, tingkat pemenuhan gizi dihitung berdasarkan perbandingan total asupan harian dengan kebutuhan siswa tiap individu, dan status gizi diperoleh dari data antropometri dan kadar hemoglobin siswa. Hasil penelitian menunjukkan konsumsi pangan hewani siswa belum sesuai dengan anjuran pedoman gizi seimbang. Tingkat pemenuhan gizi siswa tergolong defisit kecuali zat besi. Sebagian besar siswa berstatus gizi baik, namun masih terdapat siswa yang tergolong gizi lebih (5,7%) dan obesitas (6,7%), serta 77,9% siswa mengalami anemia dengan tingkat keparahan yang berbeda-beda. Hasil uji statistik menunjukkan kontribusi gizi dari pangan hewani berhubungan signifikan positif dengan pemenuhan gizi, sedangkan kontribusi energi, protein, dan lemak dari pangan hewani memiliki hubungan signifikan negatif dengan status gizi (IMT/U), serta terdapat hubungan signifikan negatif antara kontribusi energi, protein, lemak, dan vitamin B9 dari pangan hewani dengan kadar hemoglobin (p<0,05)., Animal protein consumption that contain lots of protein, vitamins, minerals is still relatively less, especially in school-age children and adolescents. This study aimed to analyze animal protein consumption, nutrient adequacy level, and nutritional status of elementary school students in Cijeruk, Bogor. The research design was cross-sectional study with secondary data on 915 subject from 16 elementary schools in Cijeruk, Bogor in 2019. Animal protein consumption’s were collected by 3×24 hours, nutrient adequacy level were calculated based on student’s nutrient requirements, nutritional status were collected from anthropometry’s data and student’s hemoglobin levels. The results showed student’s animal protein consumption is not accordance with recommended balanced nutrition guidelines. Student’s adequacy level of macro and micro nutrient were classified as deficit except iron. Most of students had good nutritional status, but still had students who classified overweight (5,7%) and obese (6,7%). 77,9% students have anemia with different severity. Correlation test showed contribution nutrients from animal protein foods was significantly positive with nutrient adequacy, while contribution of energy, protein, and fat from animal protein foods was significantly negative with nutritional status (BMI/A), and there was negative correlation between contribution of energy, protein, fat, and vitamin B9 from animal protein foods with hemoglobin levels (p<0,05).
Keyword: animal protein, consumption, elementary school, nutrient adequacy, nutritional status

Judul: Analysis of Breakfast Habits and Breakfast Nutrients Contribution of Elementary School Students in Cijeruk, Bogor District
Abstrak: Sarapan merupakan waktu makan yang penting bagi siswa. Saat ini masih banyak masalah sarapan pada anak usia sekolah yaitu kebiasaan sarapan yang kurang baik serta kualitas yang rendah. Penelitian ini bertujuan menganalisis kebiasaan dan kontribusi gizi sarapan pada siswa sekolah dasar di Cijeruk, Kabupaten Bogor. Desain penelitian ini adalah cross sectional study menggunakan data sekunder penelitian Hardinsyah et al. (2019) di 16 sekolah dasar dengan subjek penelitian sebanyak 915 siswa. Data yang dikumpulkan meliputi karakteristik subjek serta konsumsi makanan dan minuman, termasuk sarapan melalui metode food recall 3x24 jam. Asupan energi dan 11 zat gizi diolah menggunakan daftar kandungan gizi pangan dan kebutuhan zat gizi dihitung untuk setiap siswa. Kebiasaan sarapan meliputi frekuensi sarapan selama seminggu terakhir, jenis makanan minuman dan tipe sarapan. Hasil penelitian menunjukkan sebagian besar subjek rutin sarapan selama seminggu terakhir dengan jenis sarapan berupa pangan protein dan minuman manis. Pada umumnya tipe sarapan adalah pangan karbohidrat, pangan protein dan minuman. Kontribusi sarapan berkisar dari 5,6±4,8% (vitamin B9) sampai 27,9±17,3% (zat besi). Terdapat perbedaan signifikan pada kontribusi protein dan air antara subjek laki-laki dan perempuan. Tidak terdapat perbedaan signifikan kontribusi gizi makro dan mikro berdasarkan kondisi sosek keluarga subjek., Breakfast is an important meal time for school children. Neverthless, there are still many problems of breakfast in children including low quality and poor breakfast habit. The objective of this study was to analyze breakfast habits and its contribution in elementary school children in Cijeruk, Bogor. The design of this study was a cross sectional study using secondary data from Hardinsyah et al. (2019) at 16 elementary schools with 915 subjects. Data was collected such as subject characteristic, food and beverage consumption included breakfast by food recall 3x24 hours. Energy and 11 nutrients intake were processed using food nutrients composition and nutriens requirements were calculated for each students. Breakfast habits such as breakfast frequency, type of food and beverage, and type of breakfast. The results showed that most of the subjects was always had breakfast frequently for the past week with type of food that consumed during breakfast was protein food and sweet drink. In general, type of breakfast consumption was carbohydrate, protein food, and beverage. Breakfast contribution about 5,6±4,8% (vitamin B9) until 27,9±17,3% (iron). There was significant differences (p<0.05) between the contribution of protein and water from breakfast in male and female students. There was no significant differences (p>0.05) for the contribution of macro and micronutrients between socioeconomic subject.
Keyword: breakfast, nutrients contribution, school students

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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