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)
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Judul: Hubungan antara karakteristik atlet, tingkat kecukupan gizi, dan status gizi dengan tingkat kebugaran atlet sepakbola di SMA Ragunan Jakarta Selatan
Abstrak: Football game is one of the most popular sport in the world. This game requires the endurance of the heart-lung capacity both to desaibe the activity continuously with a Jong time without experiencing fatigue. One efforl to obtain physical endurance (fitness level) is a good nutrition in accordance with the needs of athletes that can be adequate nutnents to perform activities. Nutnent intake according to the needs of football athletes are able to make an athlete has a normal nutritional status that will have a good level of fitness. This study aims to determine characteristics of athletes, level of nutritional adequacy, nutritional status, and fitness level of football athletes in SMA Ragunan, South Jakarta. The study was conducted in May to June 2009 by using cross-sectional study design. The number of samples is 22 football athletes selected by using purposive sampling. The data obtained were analyzed using Pearson product moment corellation test, Spearman core//ation test, and ANOVA test The results of this study include statistical tests between the characteristics of athletes with fitness level (VO2 max) is there no relationship between the age of football athletes with fitness level (VO2 max) (p> 0.05, r = 0187), ANOVA test results showed there was no real difference between the position of athletes playing football with fitness level (VO2 max) (p> 0.05), and there is no relationship between body fat percentage with fitness level (VO2 max) (p> 0.05, r = 0401). For statistical test between nutritional status with fitness level (VO2 max) is there is no relationship between the nutritional status of fitness level (VO2 max) (p> 0. 05, r = -0275). For statistical test between the level of nutritional adequacy with fitness level (VO2 max) is the relationship between the level of energy sufficiency by fitness level (VO2 max) (p <0.05, r = 0472). Based on the results of this research can be seen that the level of adequacy of energy has an imporlant relationship with a fitness level that is recommended to maintain adequate nutrition (energy) athletes by consuming food sources of energy and protein. In addition, football athletes should increase the consumption of food containing other nutnents and supplement such as calci_um, iron, vitamin A, vitamin C, and vitamin B which has an important role in energy metabolism.
Keyword: Level of adequacy of energy, Fitness level, VO2 max

Judul: Bifurkasi Hopf pada siklus bisnis IS-LM tanpa dan dengan waktu tunda
Abstrak: One of business cycle models in dynamical economics is the IS-LM business cycle model with time delay, where the time delay lies in stock capital variables. It is a time delay between the existence of stock capital and the time to get ready to invest. In a model without time delay, changing the parameter of investment rate on income could affect the system stability. On the other hand, in a model with time delay, there exists critical time delay changing the system stability. This shows limit cycle, which can be concluded that Hopf bifurcation occurs
Keyword: Bogor Agricultural University (IPB), time delay, Hopf bifurcation, business cycle model