Judul: Correlation between Knowledge, Attitudes, Nutrition Practices, and Food Consumption with The Nutritional Status of Primary School-aged Children in Bogor City
Abstrak: Anak usia sekolah dasar membutuhkan asupan gizi yang baik sesuai dengan kebutuhannya. Permasalahan gizi pada anak dipengaruhi oleh kebiasaan makan dan aktivitas fisik anak. Tujuan penelitian ini adalah menganalisis hubungan pengetahuan, sikap, praktik gizi dan konsumsi pangan dengan status gizi anak usia sekolah dasar di Kota Bogor. Desain penelitian ini adalah cross-sectional yang dilaksanakan pada bulan September 2022-Januari 2023 di Kota Bogor. Subjek penelitian berusia 9-12 tahun dengan status gizi lebih sebesar 20% dan obesitas sebesar 12,5%. Pengambilan data dilakukan dengan pengisian kuesioner serta wawancara food recal 2x24 jam, recall aktivitas fisik 2x24 jam dan Food Frequency Questioner (FFQ). Tidak terdapat hubungan yang signifikan antara pengetahuan (p=0,313), sikap (p=0,172), praktik gizi (p=0,351), tingkat kecukupan energi (p=0,960), tingkat kecukupan protein (p=0,533), tingkat kecukupan lemak (p=0,785), tingkat kecukupan karbohidrat (p=0,555) dan aktivitas fisik (p=0,501) dengan status gizi., Primary school-age children need good nutritional intake according to their needs. Nutritional problems in children are influenced by eating habits and physical activity. The purpose of this study was to analyze the correlation between knowledge, attitudes, nutritional practices and food consumption with the nutritional status of primary school-age children in Bogor City. The design of this study was cross-sectional which was carried out in September 2022-January 2023 in Bogor City. The research subjects were aged 9-12 years with excess nutritional status of 20% and obesity of 12.5%. Data collection was carried out by filling out questionnaires as well as 2x24 hour food recall interviews, 2x24 hour physical activity recall and Food Frequency366 Questioner (FFQ). There was no significant relationship between knowledge (p=0.313), attitude (p=0.172), nutritional practices (p=0.351), energy adequacy level (p=0.960), protein adequacy level (p=0.533), fat adequacy level (p=0.785), level of carbohydrate adequacy (p=0.555) and physical activity (p=0.501) with nutritional status.
Keyword: attitudes, Food consumption, knowledge, nutritional status, nutritional practices

Judul: Correlation between Nutritional Knowledge and Food Consumption with Nutritional Status of Primary School Children at Teluk Batang Village, Kayong Utara District
Abstrak: Anak-anak merupakan kelompok yang rentan mengalami masalah gizi. Salah satu faktor yang berpengaruh langsung terhadap status gizi anak adalah konsumsi pangan. Tujuan penelitian ini adalah mengkaji hubungan pengetahuan gizi dan kualitas konsumsi pangan dengan status gizi siswa Sekolah Dasar di Desa Teluk Batang, Kabupaten Kayong Utara. Penelitian ini menggunakan desain potong lintang dengan jumlah contoh penelitian sebanyak 60 orang, terdiri atas 19 orang siswa SD Negeri 01 Teluk Batang dan 41 orang siswa MIS Babul Mu’minin. Data diperoleh melalui pengisian kuesioner, recall 2×24 jam, dan pengukuran antropometri. Data dianalisis menggunakan Statistical Package for Social Science (SPSS) version 16 for Windows. Hasil uji korelasi menunjukan bahwa pengetahuan gizi contoh, pengetahuan gizi ibu, dan kualitas konsumsi pangan tidak memiliki hubungan yang signifikan (P>0,05) dengan status gizi. Namun, tingkat kecukupan protein memiliki hubungan yang signifikan negatif dengan status gizi contoh (P<0,05)., The susceptible group to suffer nutritional problems is children. One factor that directly influences nutritional status is food consumption. This study aimed to examine the correlation of nutrition knowledge, quality of food consumption and nutritional status of primary school children at Teluk Batang Village, Kayong Utara District. The design of this study was cross-sectional using primary data collected by purposive sampling. The total subject of this study was 60 subjects, consisting of 19 SD Negeri 01 Teluk Batang students and 41 MIS Babul Mu’minin students. Data collected using questionnaires, recall 2×24 hours, and anthropometric measurements. Data were analyzed by Statistical Package for Social Science (SPSS) version 16 for Windows. The results showed that nutritional knowledge of subject’s, mother’s nutritional knowledge, and quality of food consumption were not significantly correlated with nutritional status (P>0,05). However, adequacy level of protein significantly correlated with nutritional status of subjects (P<0,05).
Keyword: food, consumption, nutritional, knowledge, nutritional, status

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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