Judul: Correlation between Stress Level, Eating Behavior Type, Nutrition Intake, and Nutritional Status in Students of SMAN 1 Kalianda
Abstrak: Pelajar cenderung mengembangkan kebiasaan makan yang buruk ketika berada dalam situasi yang memicu kondisi stres. Konsumsi makanan yang tidak sehat dapat menyebabkan remaja mengalami masalah gizi. Penelitian bertujuan menganalisis hubungan tingkat stres, tipe perilaku makan, asupan zat gizi, dan status gizi pada siswa di SMAN 1 Kalianda. Penelitian dilakukan pada bulan Agustus-September 2022 pada 92 subjek dengan studi cross sectional. Hasil penelitian menunjukkan faktor yang paling memicu kondisi stres pada subjek berkaitan dengan beban kerja dalam belajar. Sejumlah 44,6% subjek memiliki kecenderungan untuk menjadi emotional eaters. Hasil analisis korelasi rank Spearman menunjukkan terdapat hubungan signifikan antara tingkat stres, tingkat kecukupan energi, tingkat kecukupan protein, dan tingkat kecukupan karbohidrat dengan status gizi (p>0,05). Tidak terdapat hubungan signifikan antara tipe perilaku makan dan tingkat kecukupan lemak dengan status gizi (p>0,05).
Keyword: emotional eating, konsumsi makanan, status gizi, tingkat stres

Judul: Hubungan Stres, Kualitas Konsumsi, dan Status Gizi Mahasiswa pada Masa Pandemi Covid-19
Abstrak: Mahasiswa merupakan golongan yang paling sering mengalami stres. Stres dapat menyebabkan emotional eating dan akan memengaruhi asupan dan kualitas konsumsi seseorang. Emotional eating dalam jangka waktu lama dapat memengaruhi status gizi. Penelitian ini bertujuan menganalisis hubungan antara stres, emotional eating, kualitas konsumsi dan status gizi mahasiswa. Desain penelitian menggunakan cross-sectional dengan 42 subjek yang dilakukan pada bulan Oktober–November 2020 secara daring. Hasil penelitian menunjukkan bahwa semua subjek mengalami stres. Sebagian besar subjek mengalami emotional undereating dan lainnya mengalami emotional overeating. Asupan dan densitas gizi subjek tergolong kurang, namun keberagaman konsumsinya cukup baik. Terdapat hubungan antara stres dan emotional undereating serta emotional overeating dengan asupan lemak, asupan zat besi dan kecukupan zat besi, emotional undereating dengan asupan dan kecukupan karbohidrat dan vitamin A serta densitas vitamin C. Status gizi berhubungan dengan dengan emotional overeating, asupan, kecukupan dan densitas vitamin A dan zat besi namun tidak terdapat hubungan antara stres dengan status gizi., College’s student experiences stress the most. Stress can cause emotional eating and affect the intake and quality of consumption. Emotional eating in a long term can affect nutritional status. This study aims to analyze the relationship between stress, emotional eating, quality of consumption and nutritional status of college’s students. The research used a cross-sectional study with 42 subjects and conducted online from October–November 2020. The result showed that all subjects experienced stress. Most of the subjects known to experience emotional undereatin while the other experience emotional overeating. The intake and nutrient density of the subjects were classified as defficient, but had a fairly good food diversity. There is a relationship between stress and emotional undereating, emotional overeating with fat and iron intake, emotional undereating with carbohydrate and vitamin A intake. Nutritional status positively related to emotional overeating, and vitamin A and iron intake. There’s no relationship between stress and nutritional status.
Keyword: college’s students, emotional eating, nutritional status, quality of consumption, stress

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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