Judul: Ecological Study of Vitamin A Coverage among Toddlers in Indonesia
Abstrak: Vitamin A memiliki peran penting dalam mendukung kesehatan dan perkembangan anak sehingga dapat mencegah terjadinya kekurangan mikronutrien yang termasuk dalam masalah triple burden malnutrisi yang berdampak kepada stunting. Kekurangan vitamin A banyak terjadi pada balita yang dapat menyebabkan kebutaan serta menurunkan daya tahan tubuh sehingga meningkatkan risiko balita terserang penyakit infeksi dan berujung kematian. Langkah pemerintah Indonesia untuk menanggulangi kekurangan vitamin A yaitu dengan memberikan suplementasi kapsul vitamin A pada bulan Februari dan Agustus. Penilitian ini bertujuan untuk menganalisis hubungan kepemilikan buku KIA, balita mendapat imunisasi lengkap, kab/kota dengan minimal 80% posyandu aktif, akses internet penduduk, ketersediaan fasilitas pelayanan kesehatan, dan ketersediaan tenaga kesehatan dengan cakupan vitamin A pada balita di Indonesia tahun 2022. Desain penelitian ini menggunakan studi ekologi dengan data sekunder. Hasil uji korelasi menunjukkan bahwa hubungan signifikan antara balita mendapat imunisasi lengkap, ketersediaan fasilitas pelayanan kesehatan, dan ketersediaan tenaga kesehatan dengan cakupan vitamin A pada balita (p = 0,016 ; 0,001, 0,001 <0,05) dengan arah korelasi positif. Tidak terdapat hubungan signifikan antara kepemilikan buku KIA, kab/kota dengan minimal 80% posyandu aktif, dan akses internet penduduk dengan cakupan vitamin A pada balita (p = 0,150 ; 0,435, 0,417 >0,05)., Vitamin A plays an important role in supporting the health and development of children, thereby preventing micronutrient deficiencies which are part of the triple burden of malnutrition leading to stunting. Vitamin A deficiency is common among toddlers and can cause blindness, reduce immunity, increase the risk of infectious diseases, and result in death. The Indonesian government's step to address vitamin A deficiency is by providing vitamin A capsule supplementation in February and August. This study aims to analyze the relationship between the ownership of KIA books, toddlers receiving complete immunization, districts/cities with at least 80% active posyandus (integrated health service posts), internet access for the population, availability of health service facilities, and availability of health workers with vitamin A coverage among toddlers in Indonesia in 2022. The study design used an ecological study with secondary data. The correlation test results showed a significant relationship between toddlers receiving complete immunization, the availability of health service facilities, and the availability of health workers with vitamin A coverage among toddlers (p = 0.016; 0.001, 0.001 <0.05) with a positive correlation direction. Meanwhile, there was no significant relationship between owning an KIA book, districts/cities with at least 80% active posyandus, and internet access for the population with vitamin A coverage among toddlers (p = 0.150; 0.435, 0.417 > 0.05).
Keyword: Balita, Fasilitas Pelayanan Kesehatan, Imunisasi, Tenaga Kesehatan, Vitamin A

Judul: Children Feeding Practices, Food Consumption, and  Toddlers Anemia Status in Locus Stunting Village Cirebon Regency
Abstrak: Anemia merupakan masalah gizi global dengan prevalensi 36,78% balita di Indonesia mengalami anemia. Konsumsi pangan adalah faktor utama yang mempengaruhi status anemia. Pola asuh makan juga berkontribusi dalam pembentukan pola konsumsi makan balita. Penelitian ini bertujuan menganalisis hubungan pola asuh makan dengan konsumsi pangan balita, dan hubungan karakteristik balita, pola asuh makan, dan konsumsi pangan dengan status anemia balita. Desain penelitian yang digunakan adalah cross sectional study dan menggunakan data sekunder. Jumlah subjek penelitian sebanyak 130 balita usia 6– 59 bulan. Penelitian berlokasi di 3 desa di Kecamatan Gegesik, Kabupaten Cirebon yang merupakan lokus stunting. Anemia yang terjadi pada penelitian ini mencapai 87,7% dengan tingkat keparahan paling banyak yaitu anemia tingkat sedang (75,4%). Perbedaan signifikan antara kelompok balita anemia dan tidak anemia terdapat pada variabel: berat lahir (p-value=0,010), pekerjaan ibu (p-value=0,027), tingkat kecukupan energi (p-value=0,028), tingkat kecukupan protein (p-value= 0,040), tingkat kecukupan lemak (p-value=0,002), dan tingkat kecukupan Fe (p value= 0,000). Tidak terdapat hubungan signifikan (p-value>0,05) antara pola asuh makan dengan konsumsi pangan balita. Faktor yang berhubungan dengan status anemia balita adalah usia balita (r=-0,173; p-value=0,049), tingkat kecukupan Fe (r=0,179; p-value=0,042), konsumsi hati ayam (r=0,190; p-value=0,030), dan konsumsi telur (r=-0,207; p-value=0,018)., Anemia is global nutritional problem with a prevalence of 36,78% of toddlers in Indonesia experiencing anemia. Food consumption is the main factor that affect anemia. Children feeding practices also contribute to formation of food consumption patterns in toddlers. This study aims to analyze the correlation between children feeding practices and food consumption for toddlers, and the relationship between toddlers characteristics, children feeding practices, and food consumption with toddlers anemia status. This research uses a cross sectional design and secondary data. The number of research subjects was 130 toddlers aged 6-59 months. The study was located in 3 villages in Gegesik District, Cirebon Regency which were locus of stunting. Anemia that occurred reached 87,7% with the highest severity is moderate anemia (75,4%). Significant differences between anemic and non-anemic toddlers groups were found in variables: birth weight (p value=0,010), mother's occupation (p-value=0,027), energy adequacy level (p value=0,028), protein adequacy level (p-value=0,040), fat adequacy level (p-value= 0,002), and iron adequacy level (p-value=0,000). There is no significant relationship (p-value>0,05) between children feeding practices and food consumption in toddlers. Factors related to anemia status of toddlers are toddler’s age (r=-0,173; p-value=0,049), iron adequacy level (r=0,179; p-value=0,042), chicken liver consumption (r=0,190; p-value=0,030), and egg consumption (r=- 0,207; p-value=0,018).
Keyword: Anemia, Children feeding practices, Food consumption, Stunting, Toddlers

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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