Judul: Pola Asuh Makan, Kualitas Konsumsi Protein, dan Perkembangan Kognitif Anak Usia Prasekolah
Abstrak: Anak usia prasekolah perlu mendapatkan perhatian khusus karena pada masa ini perkembangan dan pertumbuhan fisik anak berjalan dengan cepat. Penelitian ini bertujuan menganalisis hubungan pola asuh makan, kualitas konsumsi protein, dan perkembangan kognitif anak usia prasekolah di Desa Pangandaran, Kabupaten Pangandaran, Jawa Barat. Desain penelitian adalah cross sectional study. Contoh yang diamati sebanyak 50 anak yang terdiri atas 12 anak dari keluarga nelayan dan 38 anak dari keluarga non nelayan. Sebagian besar contoh dalam penelitian ini memiliki status gizi normal berdasarkan indeks berat badan menurut umur (BB/U), tinggi badan menurut umur (TB/U), dan berat badan menurut tinggi badan (BB/TB). Pola asuh lingkungan pada anak dari keluarga nelayan dan anak dari keluarga non nelayan tidak memiliki perbedaan yang signifikan. Terdapat perbedaan signifikan antara perkembangan kognitif anak dari keluarga nelayan dan anak dari keluarga non nelayan (p<0.05). Faktor yang berhubungan dengan perkembangan kognitif anak meliputi status gizi berdasarkan indeks TB/U (p<0.05) dan subskala stimulasi akademik pada pola asuh lingkungan (instrumen HOME) (p<0.01).
Keyword: instrumen HOME, kualitas protein, pola asuh lingkungan, status gizi

Judul: Pola asuh makan, stimulasi psikososial, dan perkembangan kognitif anak usia pra-sekolah
Abstrak: The needs of the nutrients children aged 2 to 5 years old is increasing because it would be in the rapid growth and their high activities. The objective of this study was to analyze relationship of child eating patterns, psychosocial stimulation, and cognitive development of preschool children at Subang, West Java. Energy and protein intake between normal and stunting child have a positive significant difference (p<0.05). Dietary diversity score and child eating patterns between normal and stunting child was no difference. The stunting child of having KMS is 34.6% and 34.0% child of non-KMS. Psychosocial stimulation between normal and stunting child have a positive significant difference (p<0.05). There are positive significant different between child of PAUD members and non- PAUD members for cognitive development. Factor that relation with nutritional status is dietary diversity score. Meanwhile, factors that relation with cognitive development, includes the participants of child in PAUD and pshycosocial stimulation.
Keyword: Bogor Agricultural University (IPB), psychosocial stimulation, nutritional status, dietary diversity score, cognitive development, child eating patterns

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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