Judul: Studi konsumsi pangan hewani dan waktu pubertas pada siswi sekolah dasar di Bogor
Abstrak: Currently the consumption of animal food of Indonesia's population is still low, which only reached 6.6 kg/capita/year (Hanani 2009). Consumption of livestock products of Indonesians in 2008 (BPS 2010b) was 4.8 kg/capita/year for meat, 17.42 kg/capita/year for eggs, and 0.28 kg/capita/year for milk. This study aims to determine the frequency of consumption of animal food among female elementary school students in the City of Bogor and its association to menarche time of puberty.The design used was cross-sectional study. The total sample consisted of 38 female students who were menstruating and 38 female students who have not been menstruating. Most of the samples (84.21%) experienced first menstruation at age 9-11 years.The most common animal food consumption of menstruating students was milk with an average of 9.8 ± 7.0 times/week. Chicken and milk were often consumed by students of this group with a percentage of 97.4%. Whereas the most common animal food consumption of non-menstruating students was also milk with an average frequency of consumption 13.3 ± 8.4 times/week. Eggs were most often consumed by students of this group with the percentage of 100%. There was a significant association between the frequency of milk consumption with the amount of pocket money of students who are menstruating (p=0.037). Demonstrated a significant association between knowledge of nutrition with a frequency of egg consumption (p=0.010) in students who have periods while students who have not menstruation showed no association between these variables. There was an apparent association between the FFQ sausage meat with the age at first menstruation (p=0.022). There was no significant association between age at first menstruation with nutritional status (height for age, p=0.788 and BMI for age, p=0.060) and consumption of nutrients (energy, p=0.993 and protein, p=0.889) and the rate of nutrient adequacy (energy, p=0.905 and protein, p=0.847). In the group of students who have menstrual periods there was no significant association between nutritional status with sufficient levels of nutrition (p>0.05).
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Judul: Keterkaitann konsumsi pangan dan status gizi dengan usia menarche anak perempuan usia sekolah dasar di Bogor
Abstrak: Tujuan penelitian ini adalah menganalisis hubungan konsumsi makanan dan status gizi dengan usia menarche pada anak sekolah dasar di Kota Bogor. Penelitian menggunakan desain cross sectional study, dilakukan pada bulan September sampai November 2011 di enam sekolah dasar di Bogor. Sampel dipilih secara purposif sehingga diperoleh 58 siswa. Data dianalisis menggunakan uji rank spearman. Hasil penelitian menunjukkan rata-rata usia menarche adalah 10,74± 0,71. Lebih dari separuh (62,1%) siswa mengalami menarche pada usia ≥ 10 tahun. Usia menarche berhubungan negatif signifikan dengan konsumsi zat besi tetapi tidak berhubungan dengan status gizi, usia ibu menarche, jumlah anggota keluarga, pengetahuan gizi anak, latar belakang pendidikan ayah, dan pendapatan rumah tangga. Penelitian ini menyarankan agar orang tua lebih memberikan informasi dan dukungan mengenai aspek-aspek yang berkaitan dengan pubertas.
Keyword: Food consumption, Nutritional status, Menarche, Elementary school, Puberty

Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix