Judul: Relationship between Stress Level, Physical Activity and Sugar Consumption in Undergraduate Students of IPB University
Abstrak: Stres merupakan kondisi ketika seseorang mengalami masalah atau tekanan yang berdampak pada kondisi fisik dan psikis. Penelitian sebelumnya menemukan bahwa stres berasosiasi dengan aktivitas fisik dan konsumsi gula. Namun, penelitian tersebut belum dilakukan di Indonesia. Penelitian ini bertujuan menguji hubungan antara tingkat stres dengan aktivitas fisik dan konsumsi gula pada mahasiswa sarjana di IPB University. Data dikumpulkan dari hasil pengisian kuesioner oleh 400 mahasiswa sarjana di IPB University. Perceived Stress Scale (PSS-10) digunakan untuk mengukur tingkat stres responden, International Physical Activity Questionnaire (IPAQ) digunakan untuk mengukur aktivitas fisik responden, dan Food Frequency Questionnaire (FFQ) digunakan untuk mengukur konsumsi gula. Data dianalisis dengan perangkat lunak R Studio. Korelasi antara tingkat stres, aktivitas fisik, dan konsumsi gula dianalisis dengan uji korelasi Spearman. Studi ini menunjukkan bahwa mahasiswa sarjana IPB University memiliki tingkat stres yang sedang (19,71±5,28). Tingkat stres tidak berkorelasi signifikan dengan aktivitas fisik (? = -0,006, p-value = 0,95) dan konsumsi gula (? = 0,045, p-value = 0,359)., Stress is a condition when a person experiences problems or pressures that have an impact on physical and psychological conditions. Previous studies have found that stress is associated with physical activity and sugar consumption. However, these studies have not been conducted in Indonesia. This study aims to examine the relationship between stress levels with physical activity and sugar consumption in undergraduate students at IPB University. Data were collected from questionnaires completed by 400 undergraduate students at IPB University. Perceived Stress Scale (PSS-10) was used to measure respondents' stress level, International Physical Activity Questionnaire (IPAQ) was used to measure respondents' physical activity, and Food Frequency Questionnaire (FFQ) was used to measure sugar consumption. Data were analyzed with R Studio software. The correlation between stress levels, physical activity, and sugar consumption were analyzed with the Spearman correlation test. This study showed that IPB University undergraduate students had moderate stress levels (19.71±5.28). Stress level was not significantly correlated with physical activity (? = -0.006, p-value = 0.95) and sugar consumption (? = 0.045, p-value = 0.359).
Keyword: FFQ, PSS, IPAQ

Judul: The Relationship of Nutrition Knowledge, Stress Level and Consumption of Sugar, Salt and Fat with Nutritional Status of College Student
Abstrak: Penelitian ini bertujuan untuk menganalisis hubungan antara pengetahuan gizi, tingkat stres dan konsumsi gula, garam dan lemak dengan status gizi mahasiswa. Desain penelitian ini adalah studi cross-sectional dengan jumlah subjek sebanyak 100 mahasiswa Institut Pertanian Bogor. Penelitian dilakukan pada bulan Desember 2022-Januari 2023. Pengumpulan data dilakukan melalui dua metode, yaitu pengisian kuesioner secara online dan wawancara serta pengukuran antropometri. Tingkat pengetahuan gizi terkait asupan gula, garam dan lemak sebagian besar tergolong dalam kategori cukup (86,0%). Sebagian besar subjek penelitian ini masuk ke dalam kategori stres sedang (82,0%). Mayoritas subjek penelitian mengkonsumsi gula, garam dan lemak sesuai anjuran Kemenkes (2013) dengan persentase masing-masing 74,0%, 87,0% dan 68,0%. Hasil analisis menunjukkan bahwa tidak terdapat hubungan signifikan antara tingkat stres terhadap konsumsi gula, garam dan lemak serta status gizi mahasiswa (p>0,05). Tidak adanya hubungan signifikan antara pengetahuan gizi terhadap konsumsi gula, garam dan lemak. Begitupun dengan variabel antara konsumsi gula, garam dan lemak terhadap status gizi mahasiswa yang menunjukkan hubungan tidak signifikan (p>0,05)., The aim of this study is to analyze the relationship between nutrition knowledge, stress level and consumption of sugar, salt and fat with the nutritional status of college students. The design of this research is a cross-sectional study with 100 subjects of IPB University students. This research was conducted in December 2022-January 2023. Data collection was conducted by two methods, interviews and online questionnaire and anthropometric measurements. The subject’s nutrition knowledge is in the medium category (86.0%). Most of the subjects experienced moderate stress (82.0%). The majority of research subjects consumed sugar, salt and fat as recommended by the Ministry of Health (2013) with a percentage of 74.0%, 87.0% and 68.0% respectively. The analysis shows that there was no significant correlation between stress levels with consumption of sugar, salt and fat and the nutritional status of college students (p>0.05). There was no significant correlation between nutrition knowledge and sugar, salt and fat consumption. The same for variables of sugar, salt and fat consumption with the nutritional status of college students also showed no significant correlation (p>0.05).
Keyword: final year student, perceived stress scale, nutritional problem

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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