Judul: Hubungan Suplementasi Vitamin A pada Ibu Nifas dan Morbiditas Bayi Umur 0-6 bulan di Kecamatan Ciampea, Kabupaten Bogor.
Abstrak: The objectives of this research was to analyze correlation between vitamin A supplementation in postpartum maternal and the morbidity of infant 0-6 month in Ciampea Sub-district. A cross sectional study of 56 subjects was conducted. Data used in this study were pregnancy care and breastfeeding practices, vitamin A supplementation, immunization, clean and living healthy behaviour (CLHB) and morbidity. The result of this study showed that infant 0-6 month suffered acute respiratory infection (ARI) (66.1%), fever (25.0%), diarrhea (14.3%), skin disease (7.1%), hepatitis B (3.6%), dengue fever (1.8%) and sprue (1.8%). The result of this study showed that there were correlation between immunization with frequency and duration of hepatitis B, the number of taking vitamin A supplement with incident of diseases, complementary feeding and complete immunization with duration of all illness (p<0,05). The logistic regression analysis showed that there were significant effect between complete immunization with duration of all illness (p=0.044, OR=0.110, 95% CI=0.013-0.940), number of taking vitamin A supplement with incident of diseases (p=0.021, OR=0.103, 95% CI=0.015-0.715).
Keyword: infant, morbidity, postpartum maternal, vitamin A

Judul: Keterkaitan Kecukupan Vitamin A Ibu, Praktek Pemberian Air Susu Ibu dan Kelengkapan Imunisasi Dasar dengan Morbiditas Bayi
Abstrak: Vitamin A has an important role for health to keep normal function of immune system. Therefore, insufficiency of vitamin A on lactating women is associated with infant morbidity. The study was aimed to analyze correlation of maternal sufficiency of vitamin A, exclusive breastfeeding practices and immunization completeness with infant morbidity. This cross sectional study was conducted in four village at Gurah Subdistrict, Kediri District with 31 samples were included. The data of maternal’s food consumption, exclusive breastfeeding practices, immunization completeness and infant morbidity were collected by interview and data of nutritional status was collected by measurement of body weight and lenght. Maternal sufficiency of vitamin A were 58% sufficient and 42% insufficient. There was 68% of infants suffered of diseases, i.e. respiratory disease, fever, diarrhea. Higher maternal vitamin A sufficiency tend to corellate with shorter period of infant’s illnesses. Meanwhiele, exclusive breastfeeding practices tend corellate with with shorter period and lower frequency of illnesses of infant.
Keyword: vitamin A., infectious disease, morbidity, lactating woman, infant

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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