Judul: Pengaruh Penyuluhan Gizi Terhadap Pengetahuan, Konsumsi Pangan dan Status Gizi Siswa Obesitas di SMPN 5 Bogor
Abstrak: The purpose of this study was to analyze nutritition counseling effect to increased student knowledge, food consumption and nutritional status for obesity students in SMPN 5 Bogor. Design of study which used were pre-experimental with one group pretest-posttest. Sample were taken purposively based on inclusion criteria, 34samples as the result. Nutrition counseling conducted for 4 times in 4 weeks. The topics of nutrition counseling were introduction of nutrient, food varians, and balanced nutrition, healthy snack, ideal body weight and physical activity. The result of nutrition counseling had a significant influence on student nutrition knowledge (p = 0.002, p<0.05), energy intake (p = 0.00, p <0.05), protein intake (p = 0.00, p< 0.05), fat intake (p = 0.01, p <0.05), and carbohydrate intake (p = 0.002, p<0.05), whereas no nutrition counseling had a significant influence on physical activity and nutritional status (p> 0.05).
Keyword: obesity., nutrition knowledge, food consumption, counseling nutrition

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: 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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