Judul: Hubungan Konsumsi Pangan dan Status Gizi dengan Tingkat Kebugaran Atlet Taekwondo Remaja di Pemusatan Latihan Nasional Cipayung, Bogor
Abstrak: The general objective of study was to analyze food consumption, adequacy ratio, nutritional status, and fitness level of adolescents taekwondo athletes in Centralization of National Training Cipayung, Bogor. The research used cross sectional study design with 23 adolescents athletes as samples. The primary data included characteristic of samples, nutritional status by anthropometry (body mass index), and food consumption. The secondary data included fitness level by bleep test (VO2 max values), sit and reach test (flexibility), sit up and squat jump (muscle endurance), and overview of the study site which was Centralization of National Training. The study showed that overall athletes has normal nutritional status. Most athletes were lack of sufficient levels of energy and protein. There was positive correlations between the ages of athletes with flexibility (p<0,05, r=0,456) and muscle endurance (sit up test) (p<0,05, r=0,456). The correlations between with fitness level (VO2 max) was positive significantly correlated (p<0,05, r=0,456).
Keyword: 

Judul: Hubungan Antara Karakteristik Atlet, Tingkat Kecukupan Gizi, dan Status Gizi Dengan Tingkat Kebugaran Atlet Taekwondo di SMA Ragunan Jakarta
Abstrak: Nutrition is a factor to consider for the achievements of athletes to guidance in the training game until the game. For athletes, nutrient intakes associated with the sport had significance in addition to maintain fitness as well to increase the achievements in sport athlete who participated. In this study had been studied about anthropometry, sufficient levels of nutritional status, fitness level of athletes from the Senior High School Ragunan in South Jakarta. The objective of this study was to analyze the characteristics of the athletes, the consumption, level of nutritional adequacy, nutrition status, and fitness level of taekwondo's athletes. Design of the experiments was cross sectional study. The data used were primary and secondary data in the form of characteristic examples, data knowledge of nutrition, anthropometry (weight and height), food consumption, level of fitness results of balke test (VO2 max values), and an overview of the school which is study site. Analyses were performed by data entry, and then processed by a computer program Microsoft Excel 2007 and Statistical Program Social Sciences (SPSS) version 19.0, then the correlation between variables was tested using Pearson and Spearman Correlation test. The results of this study showed most of the taekwondo athletes had normal nutritional status. However, consumption of athletes still do not fulfill the nutrition needs of the athletes, most of the athletes have a lack of sufficient levels of energy. The average value of VO2 max that male athlete were 45.49 ± 4.74 ml/kg/min, while the average value of VO2 max female were below compare to male sex, amounting to 42.03 ± 3.13 ml/kg/min. The relationship between weight loss fitness level had a significant negative correlation (p = 0.028, r = -0.448) and the result of the independent T test between VO2max male and female were highly significant (p<0.05)
Keyword: 

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.
Keyword: