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: The Correlation between Nutritional Knowledge, Eating Habits, and Physical Activity with Nutritional Status among Student of SMAN 1 Kebumen
Abstrak: Prevalensi remaja gemuk usia 16-18 tahun di Indonesia meningkat pada tahun 2018. Kegemukan pada remaja dapat menimbulkan dampak negatif terkait aspek kesehatan dan psikososial. Penelitian ini bertujuan menganalisis hubungan pengetahuan gizi dengan kebiasaan makan, hubungan kebiasaan makan dengan status gizi, dan hubungan aktivitas fisik dengan status gizi siswa SMAN 1 Kebumen. Penelitian dilakukan pada Mei 2023 menggunakan desain cross sectional, melibatkan 30 remaja normal dan 30 remaja gemuk yang dipilih secara purposive. Data primer diperoleh melalui pengisian kuesioner dan wawancara berupa data karakteristik individu, karakteristik keluarga, pengetahuan gizi, aktivitas fisik, dan kebiasaan makan. Hasil uji beda menunjukkan tidak terdapat perbedaan signifikan (p>0,05) pengetahuan gizi, aktivitas fisik dan duduk, tingkat kecukupan energi dan zat gizi, asupan gula, serta kebiasaan pangan sumber gula dan lemak antara kedua kelompok subjek, namun kelompok subjek gemuk signifikan lebih banyak asupan lemaknya (p<0,05). Hasil uji korelasi menunjukkan hubungan signifikan positif antara asupan lemak dengan status gizi (p=0,01). Tidak terdapat hubungan signifikan pengetahuan gizi dengan kebiasaan pangan sumber gula dan lemak, asupan gula dan lemak, serta tingkat kecukupan energi dan zat gizi. Tidak terdapat perbedaan signifikan kebiasaan pangan sumber gula dan lemak, asupan gula, tingkat kecukupan energi dan zat gizi, dan aktivitas fisik dengan status gizi (p>0,05)., Prevalence obese adolescents aged 16-18 years in Indonesia increased in 2018. Obesity in adolescents have negative impacts related to health and psychosocial. This study aims to analyze correlation nutritional knowledge and eating habits, correlation eating habits and nutritional status, and correlation physical activity and nutritional status students at SMAN 1 Kebumen. Study was conducted in May 2023 using a cross-sectional design, involving 30 normal and 30 obese adolescents that selected purposively. Primary data was obtained through questionnaires and interviews with individual characteristics, family characteristics, nutritional knowledge, physical activity, and eating habits. There was no significant difference (p>0.05) nutritional knowledge, physical activity and duration of sitting, energy and nutrients adequacy level, sugar intake, and eating habits of food sources sugar and fat between two subject, but obese subjects had significantly higher fat intake (p<0.05). There was a significant positive correlation fat intake and nutritional status (p=0.01). There was no significant correlation nutritional knowledge with eating habits of food sources sugar and fat, intake sugar and fat, also energy and nutrients adequacy level (p>0.05). There was no significant correlation eating habits of food sources sugar and fat, sugar intake, energy and nutrients adequacy level, and physical activity with nutritional status (p >0.05).
Keyword: eating habits, nutritional knowledge, nutritional status, normal and obes adolescents, physical 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
Keyword: