Judul: Analisis Asupan Zat Gizi dan Status Gizi pada Remaja Putri yang Sudah dan Belum Menstruasi di Bogor
Abstrak: The general objective of this study was to analyze nutrient intake and nutritional status of menstruating and non-menstruating girls. This survey was conducted from April to September 2012 in elementary schools and junior high schools in Bogor. Total samples consisted of 35 menstruating and 35 non-menstruating girls who were chosen through screening. The results showed that the percentage of menstruating girls in urban (28.0%) were more than in rural (25.1%). About 57.1% of samples had menarche at 10 years old. The average of nutrient intake on menstruating and non-menstruating girls were under DRI (<90%). Commonly, overweight was more prevalent in menstruating samples (14.3%) compared with non-menstruating samples (2.9%). Similarly, the percent body fat measurement results showed that overweight and obese samples were more prevalent in menstruating samples (17.2%) compared with non-menstruating samples (2.9%). Independent Sample t-test showed significant differences in energy (p=0.002) and calcium (p=0.032) intake, nutritional status (p=0.007) and percent body fat (p=0.007) of between menstruating and non menstruating samples
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Judul: The Assosiation of Menstrual Patterns, Nutritional  Status, and Anemia Status with The Learning Achievement in Adolescent Girl at  Bogor Senior High School
Abstrak: Indonesia menghadapi permasalahan triple burden of malnutrition yang sebagian dialami oleh para remaja dan perempuan usia produktif. Secara spesifik, permasalahan yang dikelompok ini adalah anemia yang prevalensinya secara nasional masih terkategori tinggi. Penelitian ini bertujuan menganalisis keterkaitan antara pola menstruasi, status gizi, dan status anemia dengan prestasi belajar remaja putri di SMA Negeri Bogor. Penelitian ini menggunakan desain cross sectional dengan total subjek 105 remaja putri dan dilakukan di SMAN 7 Bogor dan SMAN 1 Ciomas Bogor. Penarikan subjek pada penelitian ini menggunakan metode accidental sampling dengan kriteria siswi SMA yang telah mengalami menstruasi, dalam keadaan sehat, bersedia menjadi subjek serta mengikuti seluruh rangkaian penelitian. Hasil penelitian subjek yang mengalami anemia sebanyak 35% dengan rerata kadar hemoglobin 12,67 ± 2,376 g/dL. Sebagian besar subjek termasuk kategori status gizi normal (79%), memiliki pola menstruasi yang normal (72%) dengan gejala yang paling banyak dirasakan yaitu nyeri punggung dan perut (90%). Mayoritas prestasi akademik subjek berdasarkan nilai rapor memiliki nilai yang baik (53%), tingkat kehadiran mayoritas tinggi (60%), dan tidak aktif dalam kegiatan ekstrakurikuler (64%). Hasil analisis uji asosiasi chi-square pada penelitian ini menunjukkan terdapat keterkaitan antara pola menstruasi dengan status anemia subjek dan status anemia subjek dengan keaktifan kegiatan ekstrakurikuler., Indonesia is facing the triple burden of malnutrition problem, which is partly experienced by teenagers and women of productive age. Specifically, the problem in this group is anemia, whose prevalence nationally is still in the high category. This research aims to analyze the relationship between menstrual patterns, nutritional status and anemia status with the academic achievement of adolescent girls at Bogor Senior High School. This research used a cross sectional design with a total of 105 female adolescent subjects and was conducted at SMAN 7 Bogor and SMAN 1 Ciomas Bogor. Subjects were drawn in this study using the accidental sampling method with inclusion, namely female high school students who had menstruated, were in good health, were willing to be subjects and participated in the entire series of research. The results showed that 35% of subjects experienced anemia with a mean hemoglobin level of 12.67 ± 2.376 g/dL. Most subjects had a normal nutritional status category (79%), had normal menstrual patterns (72%) with the most common symptoms being back and abdominal pain (90%). The majority of subjects' academic achievements based on report books had good grades (53%), the majority of attendance rate was high (60%), and they were not active in extracurricular activities (64%). The results of the chi-square association test analysis in this study showed a relationship between menstrual patterns with the subject's anemia status and the subject's anemia status with extracurricular activity.
Keyword: academic achievement, anemia status, menstrual patterns, nutritional status, presence

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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