Judul: Tingkat kebugaran, status gizi, lemak tubuh, status anemia serta prestasi belajar santriwati pondok pesantren Ummul Quro Al-Islami Bogor
Abstrak: Penelitian bertujuan untuk menganalisis hubungan tingkat kebugaran, status gizi, kadar lemak tubuh dan status anemia terhadap prestasi belajar santriwati Pondok Pesantren Ummul Quro Al-Islami Bogor. Desain penelitian yang digunakan adalah cross sectional dengan contoh penelitian yang digunakan dalam penelitian ini adalah 50santriwatiPondok Pesantren Ummul Quro Al-Islami Bogor. Pengambilan sampel dengan cara Sample random sampling berdasarkan kriteria inklusi. Status gizi 38% contoh normal dan 28% contoh overweight. Sebagian besar kadar lemak tubuh contoh tergolong normal (80%). Sebagian besar contoh tidak mengalami anemia (74%). Aktivitas fisik seluruh contoh tergolong ringan Tingkat kebugaran 98% contoh tergolong very poor. Status gizi berkorelasi signifikan dengan nilai Matematika (p<0.05). Status anemia berkorelasi signifikan dengan nilai Fisika dan Mahfudot (p<0.05). Tingkat kebugaran tidak memiliki hubungan yang bermakna dengan prestasi belajar (p>0.05)….
Keyword: Academic acheivement, Anemia, Body fat, Fitness, Nutritional status, Physical activity, Human ecology, Cross sectional study, Physical fitness, Female student, Abenic status

Judul: Hubungan Status Gizi, Status Anemia, dan Aktivitas Fisik dengan Tingkat Kelelahan dan Kebugaran Santriwati Pondok Pesantren Al Falak Bogor
Abstrak: Anemia may occur in any group, especially in women of childbearing age, pregnant women, children and adolescents. Adolescents is a period of transition from childhood to adulthood. During adolescents, the need for iron increases dramatically as a result of the expansion of the total blood volume, increased body fat mass, and the onset of menstruation in adolescent girls. Iron deficiency is associated with increased fatigue and decreased physical activity, especially in women. Monitoring of physical activity and fitness are important to maintain health. Fitness improves performance abilities so that they can perform activities optimally and get better results. In general, this study aimed to analyze the relationship between nutritional status, anemia status, and physical activity with the fatigue levels and physical fitness of adolescent girls in Al Falak Islamic Boarding School Bogor West Java. While, the specific objectives of this research are: (1) Identify of individual characteristics individual and family characteristics, (2) To assess the nutritional status of students in Pondok Pesantren Al Falak Bogor, (3) To assess the physical activity of adolescent girls in Boarding school Al Falak Bogor, (4) To analyze the relationship of nutritional status with the fatigue level of the students in Pondok Pesantren Al Falak Bogor, (5) To analyze the relationship of nutritional status with the fitness of students in Pondok Pesantren Al Falak Bogor, (6) To analyze the relationship of physical activity with fitness students in Pondok Pesantren Al Falak Bogor, (7) To analyze relationship status anemia with fatigue level students in Pondok Pesantren Al Falak Bogor, (8) To analyze the relationship between anemia status with the fitness of students in Pondok Pesantren Al Falak Bogor. This cross-sectional study was conducted at the Al Falak Islamic Boarding School Bogor, West Java on January to March 2021. As many as 43 adolescent girls were involved in this study. The inclusion criteria established for the present study were adolescent girls aged 12 to 18 years-old, healthy, not suffering from chronic diseases, are already experiencing menstruation, do not perform a blood transfusion and blood donation in the last 1 month, and having given informed consent. While the exclusion criteria are adolescent girls who are not in the Boarding school during the study. The data collected were subject’s and family’s characteristic, physical activity, and fatigue level through self administered using a questionnaire, nutritional status and body fat percentage data through anthropometric measurement using weight scale, stature meter, and bioelectrical impedance analyzer, as well as fitness level data through Bleep test. Data was analyzed using Microsoft Excel and SPSS 25.0. Spearman correlation was used to correlate the varibales. The results showed that the majority of the subjects were in the age range of 14 to 17 years. In general, most of the subject has been living in boarding schools for 12 to 24 months (41,9%). The results of the measurement of nutritional status based on BMI for age shows that more than half of the research subjects had normal nutritional status (69,8%), while 20,9% and 9,3% were included in the overweight and obesity categories. The average value of z-score BMI for
Keyword: anemia status, fatigue level, nutritional status, physical activity, physical fitness

Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
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