Judul: Macro and Micronutrient Adequacy of Vegetarian Community In Batam
Abstrak: Vegetarian merupakan diet dengan mengonsumsi pangan yang berasal dari nabati dan menghindari atau membatasi sumber pangan hewani sehingga mudah untuk terkena risiko kekurangan zat gizi tertentu. Penelitian ini bertujuan mengetahui gambaran konsumsi zat gizi makro dan mikro pada komunitas vegetarian di Yayasan Guang Ji Indonesia daerah Kota Batam. Pengumpulan data dilakukan secara snowball sampling dengan kriteria subjek berusia 19-64 tahun, minimal 3 bulan vegetarian, dan tidak sedang hamil dan/atau menyusui (bila subjek perempuan). Desain penelitian adalah cross-sectional. Hasil penelitian didapati alasan subjek memilih menjadi vegetarian adalah kepercayaan (83%), kesehatan (76%), menjunjung animal rights (73%), pengaruh lingkungan sekitar (48%), dan pengaruh keluarga (4%), status gizi subjek mayoritas adalah normal (73%), serta sumber pangan sering dikonsumsi berupa telur ayam, susu sapi, bayam, tahu, dan tempe. Uji hubungan positif yang signifikan antara tingkat kecukupan energi (p=0,047) dan karbohidrat (p=0,036) dengan usia, hubungan negatif antara tingkat kecukupan protein (p=0,001), zat besi (p=0,000), dan vitamin B9 (p=0,000) dengan jenis kelamin, tidak terdapat hubungan antara lama vegetarian dengan tingkat kecukupan gizi, serta terdapat hubungan positif antara IMT dengan asupan lemak (p=0,045) juga hubungan negatif antara IMT dengan vitamin B9 (p=0,000), dan vitamin B12 (p=0,009)., Vegetarian is a diet that mainly consumes plant-based food sources and avoids or minimizes the intake from animal-derived food sources. The purpose of this study is to understand the description of macronutrient and micronutrient intake in the vegetarian community of Yayasan Guang Ji Indonesia in Batam City. This was a cross-sectional study and data was collected using snowball sampling with criteria of 19-64 years old, minimal 3 months of vegetarian, and currently not pregnant and/or lactating. The result of this study shows the reasons subjects choose to be vegetarian are beliefs (83%), health (76%), protect animal rights (73%), environmental influence (48%), and family influence (4%), majority of subjects nutritional status is normal (73%), and the most consume foods are chicken egg, spinach, tofu, and tempeh. There are significant positive correlation between energy (p=0,047) and carbohydrate (p=0,036) adequacy level with age, negative correlation between protein (p=0,001), iron (p=0,000), and vitamin B9 (p=0,049) adequacy level with gender, there is no correlation between time span being vegetarian with nutrient adequacy level, and there are positive between fat (p=0,045) adequacy level with BMI also negative correlation between vitamin B9 (p=0,000), and vitamin B12 (p=0,009) adequacy level with BMI.
Keyword: alasan bervegetarian, status gizi, tingkat kecukupan gizi, vegetarian

Judul: Macro and Micronutrient Adequacy of Vegetarian Community In Batam
Abstrak: Vegetarian merupakan diet dengan mengonsumsi pangan yang berasal dari nabati dan menghindari atau membatasi sumber pangan hewani sehingga mudah untuk terkena risiko kekurangan zat gizi tertentu. Penelitian ini bertujuan mengetahui gambaran konsumsi zat gizi makro dan mikro pada komunitas vegetarian di Yayasan Guang Ji Indonesia daerah Kota Batam. Pengumpulan data dilakukan secara snowball sampling dengan kriteria subjek berusia 19-64 tahun, minimal 3 bulan vegetarian, dan tidak sedang hamil dan/atau menyusui (bila subjek perempuan). Desain penelitian adalah cross-sectional. Hasil penelitian didapati alasan subjek memilih menjadi vegetarian adalah kepercayaan (83%), kesehatan (76%), menjunjung animal rights (73%), pengaruh lingkungan sekitar (48%), dan pengaruh keluarga (4%), status gizi subjek mayoritas adalah normal (73%), serta sumber pangan sering dikonsumsi berupa telur ayam, susu sapi, bayam, tahu, dan tempe. Uji hubungan positif yang signifikan antara tingkat kecukupan energi (p=0,047) dan karbohidrat (p=0,036) dengan usia, hubungan negatif antara tingkat kecukupan protein (p=0,001), zat besi (p=0,000), dan vitamin B9 (p=0,000) dengan jenis kelamin, tidak terdapat hubungan antara lama vegetarian dengan tingkat kecukupan gizi, serta terdapat hubungan positif antara IMT dengan asupan lemak (p=0,045) juga hubungan negatif antara IMT dengan vitamin B9 (p=0,000), dan vitamin B12 (p=0,009)., Vegetarian is a diet that mainly consumes plant-based food sources and avoids or minimizes the intake from animal-derived food sources. The purpose of this study is to understand the description of macronutrient and micronutrient intake in the vegetarian community of Yayasan Guang Ji Indonesia in Batam City. This was a cross-sectional study and data was collected using snowball sampling with criteria of 19-64 years old, minimal 3 months of vegetarian, and currently not pregnant and/or lactating. The result of this study shows the reasons subjects choose to be vegetarian are beliefs (83%), health (76%), protect animal rights (73%), environmental influence (48%), and family influence (4%), majority of subjects nutritional status is normal (73%), and the most consume foods are chicken egg, spinach, tofu, and tempeh. There are significant positive correlation between energy (p=0,047) and carbohydrate (p=0,036) adequacy level with age, negative correlation between protein (p=0,001), iron (p=0,000), and vitamin B9 (p=0,049) adequacy level with gender, there is no correlation between time span being vegetarian with nutrient adequacy level, and there are positive between fat (p=0,045) adequacy level with BMI also negative correlation between vitamin B9 (p=0,000), and vitamin B12 (p=0,009) adequacy level with BMI.
Keyword: alasan bervegetarian, status gizi, tingkat kecukupan gizi, vegetarian

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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