Judul: Legumes Consumption Among Indonesian Population Aged 19 to 55 Years Old
Abstrak: Kacang-kacangan dapat berpotensi menjadi salah satu sumber protein berkualitas karena mengandung proporsi lemak tidak jenuh yang tinggi. Penelitian ini bertujuan untuk menganalisis konsumsi kacang-kacangan penduduk Indonesia usia 19 hingga 55 tahun berdasarkan hasil Survei Konsumsi Makanan Individu (SKMI) dari rangkaian Studi Diet Total (SDT) 2014. Desain penelitian yang digunakan adalah deskriptif kuantitatif dengan total subjek sebesar 78.376 orang. Uji independent sampel t-test digunakan untuk melihat perbedaan konsumsi kacang-kacangan, asupan energi dan protein serta kontribusinya dengan karakteristik individu. Konsumsi kelompok kacang-kacangan yang paling banyak dikonsumsi adalah kacang kedelai dan olahan (42,96 g/kap/hari) dengan tingkat partisipasi 81,8% Diikuti dengan konsumsi kacang tanah dan olahan (1,99 g/kap/hari), kacang lainnya dan olahan (0,89 g/kap/hari), dan konsumsi paling rendah adalah biji-bijian dan olahan (0,52 g/kap/hari). Berdasarkan golongan usia, rata-rata asupan energi dan protein dari kacang-kacangan usia 40-55 tahun lebih tinggi dibandingkan usia 19-39 tahun (p<0,05). Rata-rata asupan energi dan protein juga diketahui lebih tinggi pada laki-laki dibandingkan perempuan (p<0,05). Berdasarkan klasifikasi wilayah, rata-rata asupan energi dan tingkat kontribusi kacang-kacangan di perkotaan lebih tinggi dibandingkan di pedesaan., Legumes can potentially be a source of quality protein because they contain a high proportion of unsaturated fats. This study aims to analyze the consumption of legumes by Indonesian population aged 19 to 55 years old based on the results of the Dietary Assessment of Individual Level (DAIL) from the Total Diet Study (TDS) 2014. The research design applied a descriptive quantitative with a total of 78,376 subjects. Independent sample t-test was applied to analyze differences in consumption of legumes, energy protein intake, and their contribution to subject’s characteristics. Consumption of the most consumed group of legumes was soybeans (42.96 g/cap/day) with a participation rate of 81.8%. Followed by the consumption of peanuts (1.99 g/cap/day), other nuts (0.89 g/cap/day), and the lowest consumption was seeds (0.52 g/cap/day). Based on age group, the average intake of energy and protein from legumes aged 40-55 years old was higher than the subject aged 19-39 years old (p<0.05). The average intake of energy and protein is also to be higher in males than in females (p<0.05). Based on the area classification, the average energy intake and contribution level of nuts in urban are higher than in rural.
Keyword: energi and protein adequacy level, legumes consumption, legumes contribution level, protein consumption, Total Diet Study

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: 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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