Judul: The Correlation between Diet Quality and Clean and Healthy Living Behavior (PHBS) with Nutritional Status of Preschoolers
Abstrak: Penelitian ini bertujuan menganalisis hubungan kualitas diet dan praktik perilaku hidup bersih dan sehat (PHBS) dengan status gizi anak prasekolah. Desain penelitian ini adalah cross sectional study yang dilaksanakan pada bulan November 2022 pada 100 balita berusia 3-5 tahun di Wilayah Kerja Puskesmas Gang Kelor Bogor. Pengumpulan data dilakukan melalui wawancara dengan responden dan observasi. Data kualitas diet dihitung berdasarkan hasil food recall 2x24 jam menggunakan Indeks Gizi Seimbang (IGS3-60) dan Dietary Diversity Score (DDS). Hasil penelitian menunjukkan hampir seluruh subjek (96%) memiliki kualitas diet buruk berdasarkan IGS3-60, namun berdasarkan DDS lebih dari 3/4 subjek (85%) memiliki skor keragaman pangan kategori sedang. Kategori PHBS baik hanya terdapat pada 1/4 subjek (23%). Terdapat hampir 1/5 subjek mengalami kekurangan gizi (underweight 17%, wasting 11%, dan stunting 19%), serta 1/5 subjek kelebihan gizi (overweight-obese 25%). Penelitian ini tidak menemukan hubungan yang signifikan (p>0,05) antara kualitas diet berdasarkan IGS3-60 dan DDS dengan status gizi subjek, demikian pula praktik PHBS dengan status gizi subjek (p>0,05), dan praktik PHBS dengan riwayat kesehatan subjek (p>0,05). Terdapat kecenderungan skor kualitas diet dan praktik PHBS yang lebih baik pada subjek dengan status gizi normal. Anak stunting dan obesitas cenderung memiliki skor kualitas diet dan praktik PHBS yang lebih rendah., The aims of this study is to analyze the correlation between diet quality and practice of clean and healthy living behavior (PHBS) with nutritional status of preschoolers. This study conducted in November 2022 involved 100 of subjects aged 3-5 years old living in Wilayah Kerja Puskesmas Gang Kelor Bogor. Data collected was done through interviews the respondents and observation. Diet quality data was calculated from 2x24 hour food recall using Balanced Nutrition Index of 3-60 (IGS3-60) and Dietary Diversity Score (DDS). Results showed that almost all subjects (96%) had poor diet quality based on Balanced Nutrition Index (IGS3-60), but according to the DDS, over 3/4 subjects (85%) had classified as moderate diet quality. Good classification of PHBS was obtained by only 1/4 of subjects (23%). Around 1/5 subjects are undernourished (underweight 17%, wasting 11%, and stunting 19%), also 1/5 subjects are overnourished (overweight- obese 25%). This study found no significant correlation between diet quality and PHBS with nutritional status of preschoolers (p>0.05) and PHBS with children health history either (p>0.05). There are tendency of better diet quality and practice of PHBS with better preschoolers nutritional status. Obese and stunting preschoolers tended to have lower diet quality and PHBS as well.
Keyword: Dietary Diversity Score (DDS), Indeks Gizi Seimbang (IGS3-60), praktik Perilaku Hidup Bersih dan Sehat (PHBS), status gizi

Judul: Hubungan Antara Praktek Perilaku HIdup Bersih dan Sehat (PHBS), Pola Asuh Makan, dan Keluarga Sadar Gizi (Kadarzi) dengan Status Gizi Balita di Kecamatan Bantar Gebang
Abstrak: Tujuan dari penelitian ini adalah untuk menganalisis hubungan antara praktik Ibu tentang Perilaku Hidup Bersih dan Sehat (PHBS), praktik pemberian makan, dan Kesadaran Gizi Keluarga (Kadarzi) dengan status gizi balita anak-anak berusia tahun. Penelitian ini berlokasi di Kelurahan Ciketing Udik, Kecamatan Bantar Gebang Kota Bekasi. Desain cross sectional digunakan dalam hal ini belajar. Jumlah sampel dalam penelitian ini adalah 72 anak balita. Uji korelasi spearman menunjukkan tidak terdapat korelasi yang signifikan antara pengetahuan gizi ibu dengan kadarzinya dan praktik pemberian makan (p>0,05). Uji korelasi spearman juga menunjukkan ada yang tidak signifikan hubungan antara praktik Kadarzi yang dilakukan ibu dengan status gizi anak (z-score berat badan per umur (WAZ), z-score panjang badan per umur (LAZ), dan z-score berat badan per tinggi badan (WHZ)) (p>0,05). Selain itu hasilnya juga menunjukkan adanya hubungan yang signifikan antara praktik PHBS ibu dengan status gizi (z-score berat badan per umur (r=0,232; p=0,050) dan z-score panjang badan per umur (r=0.362; p=0.002)) dan praktik pemberian makan dengan status gizi (z-score panjang badan per umur (r=0.253; p=0.032)).
Keyword: Family nutritional awareness (Kadarzi), Clean and Healthy Behaviour (PHBS), Feeding practice, Nutritional status, Under five years old children

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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