Judul: Dietary Fiber Intake in Indonesian's Adult Population
Abstrak: Penyakit yang erat kaitannya pada kelompok usia dewasa adalah penyakit yang tidak menular. Serat makanan memiliki manfaat bagi kesehatan apabila dikonsumsi dalam jumlah yang cukup. Penelitian ini bertujuan menganalisis asupan serat pangan pada penduduk dewasa di Indonesia. Desain penelitian ini adalah deskriptif kuantitatif yang menggunakan data sekunder Survei Konsumsi Makanan Individu (SKMI) 2014 dengan total subjek sebanyak 75.579 orang dewasa. Hasil penelitian ini menunjukkan rata-rata asupan serat penduduk dewasa Indonesia sebanyak 5,7±1,0g. Tingkat kecukupan serat pada subjek dengan kategori kurang sebanyak 98,6%. Rata-rata asupan serat tertinggi pada kelompok serealia (1,2±1,0 g/kap/hari). Selain itu, asupan serat berdasarkan kelompok pangan yaitu buah lainnya 0,8±4,6g/kap/hari; sayuran lainnya 0,8±0,9g/kap/hari; bumbu dan minuman 0,6±0,3g/kap/hari; umbi-umbian 0,6±4,6g/kap/hari; biji, kacang, dan polong 0,6±1,0 g/kap/hari. Rata-rata asupan serat lebih tinggi pada subjek di pedesaan, lebih tinggi pada laki-laki, lebih tinggi pada subjek dengan besar keluarga kecil, lebih tinggi pada subjek bekerja, dan lebih tinggi pada status ekonomi terbawah. Hasil uji statistik menunjukkan bahwa asupan serat dan tingkat kecukupan memiliki perbedaan yang nyata (p<0,05) berdasarkan klasifikasi wilayah, jenis kelamin, usia, status pekerjaan, dan status ekonomi.Walaupun demikian, asupan serat dan tingkat kecukupan tidak memiliki perbedaan yang nyata dengan subjek yang memiliki jumlah anggota rumah tangga., Diseases closely related to the adult age group include non-communicable diseases. Dietary fiber has health benefits when consumed in sufficient quantities. This study aims to analyze dietary fiber intake in Indonesian’s adult population. The research design was quantitative descriptive used secondary data from the Individual Food Consumption Survey (IFCS) 2014 with a total of 75,579 adults. Results of this study indicate the average fiber intake of the Indonesian adult population was 5.7±1.0g. The level of fiber adequacy in subjects with fewer categories was 98.6%. The highest average fiber intake was in the cereals group (1.2±1.0g). Moreover, fiber intake based on food group, that was other fruits 0.8±4.6g/cap/day; other vegetables 0.8±0.9g/cap/day; spices, condiments, and baverages 0.6±0.3g/cap/day; white roots and tubers 0.6±4.6g/cap/day; legumes, nuts, and seeds 0.6±1.0g/cap/day. The average fiber intake was higher in rural areas, higher in men, higher in subjects with small family sizes, higher in working subjects, and higher in the lowest economic status. Statistical test results showed consumption, fiber intake, and adequacy levels differed significantly (p<0.05) based on regional classification, gender, age, employment status, and economic status. However, fiber intake and adequacy levels did not differ significantly with subjects who had a number of household members.
Keyword: adult, demographics, dietary fiber intake, socioeconomic

Judul: Physical Activity, Body Composition, Nutrients Intake, and Nutritional Status of Adult Men in Sukajadi Village
Abstrak: Obesitas di perdesaan berhubungan dengan rendahnya aktivitas fisik, peningkatan komposisi tubuh, asupan dan status gizi. Tujuan penelitian ini adalah menganalisis hubungan asupan zat gizi, tingkat aktivitas fisik, dan status gizi dengan komposisi tubuh laki-laki dewasa di Desa Sukajadi. Penelitian ini dilaksanakan pada bulan Oktober 2022-Februari 2023 pada 73 orang subjek dengan desain studi cross-sectional. Pengumpulan data dilakukan melalui wawancara langsung menggunakan kuesioner, pengukuran antropometri dan komposisi tubuh menggunakan microtoise dan Bioelectrical Impedance Analysis (InBody 270). Persentase subjek dengan tingkat aktivitas fisik rendah, sedang, dan tinggi berturut-turut sebesar 39,7%, 34,2%, dan 26,1%. Sebagian besar subjek (47,9%) memiliki persen lemak tubuh dalam kategori normal dan 11,0% subjek obesitas. Sebagian besar subjek (68,5%) memiliki fat mass index normal dan 23,3% subjek tergolong lebih. Sebagian besar subjek (50,7%) memiliki fat-free mass index normal dan 42,5% subjek tergolong kurang. Rata-rata asupan energi subjek (2209±978 kkal), protein (64,2±29,4 g), lemak (56,7±35,6 g), dan karbohidrat (347,5±155,3 g). Rata-rata tingkat kecukupan energi (82,8±38,3%), protein (77,3±37,7%), lemak subjek (19,1±12,1%), dan karbohidrat (52,1±24,1%). Sebagian besar subjek (54,8%) memiliki status gizi berdasarkan Indeks Massa Tubuh (IMT) dalam kategori normal dan 11,0% subjek obesitas. Status gizi berdasarkan IMT memiliki korelasi yang signifikan terhadap persen lemak tubuh, fat mass, dan fat-free mass (p<0,05)., Obesity in rural areas is associated with physical inactivity, and increases in body composition, nutrient intake, and nutritional status. This study aims to analyze the relationship between nutrient intake, physical activity level, and nutritional status with the body composition of adult men in Sukajadi Village. This study was conducted in October 2022-February 2023 on 73 subjects with a cross-sectional study. Data was collected by direct interviews using a questionnaire, anthropometric measurements and body composition using microtoise and Bioelectrical Impedance Analysis (InBody 270). The percentage of subjects with light, active, and vigorous categories of physical activity levels respectively are 39.7%, 34.2%, and 26.1%. Most of the subjects (50.7%) have a fat mass index in the normal category and 23.3% of the subjects are in the high category. Most of the subjects (50.7%) have a fat-free mass index in the normal category and 42.5% of the subjects are in the low category. The average subjects’ energy intake (2209±978 kcal), protein intake (64.2±29.4 g), fat intake (56.7±35.6 g), and carbohydrate intake (347.5±155.3 g). The average subjects’ energy adequacy level (82.8±38.3%), protein adequacy level (77.3±38.3%), fat adequacy level (19.1±12.1%), and carbohydrate adequacy level (52.1±24.1%). Most of the subjects (54.8%) have nutritional status based on BMI in the normal category and 11.0% of the subjects are in the obese category. Nutritional status based on BMI have a significant correlation with the percentage of body fat, fat mass, and fat-free mass (p<0.05).
Keyword: adult men, body composition, nutrients intake, nutritional status, obesity, phsyical activity

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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