Judul: Nutrition Adequacy Level, Physical Activity, and Nutritional Status Breast Cancer Patient in RSUD Kota Bogor
Abstrak: Kanker payudara atau Carcinoma mammae yaitu suatu penyakit yang ditandai oleh adanya sel ganas yang menyebar di area payudara sehingga akan membentuk benjolan di area tersebut. Prevalensi kanker payudara di Indonesia mencapai mencapai 16,6% atau setara dengan 68.858 dari 396.914 kasus kanker yang terjadi di Indonesia (Globocan 2020). Penelitian ini bertujuan menganalisis tingkat kecukupan zat gizi, aktivitas fisik, dan status gizi pasien kanker payudara pada berbagai tingkat staging di RSUD Kota Bogor. Desain penelitian ini yaitu cross sectional study dengan 93 subjek yang dipilih secara incidental sampling. Data karakteristik subjek diperoleh melalui wawancara secara langsung. Data asupan makanan diperoleh melalui recall 2x24 jam dan riwayat aktivitas fisik melalui kuesioner IPAQ. Data tinggi badan, berat badan dan karakteristik klinis subjek diperoleh melalui data rekam medis subjek. Sebagian besar subjek memiliki status gizi normal dan obesitas. Tingkat kecukupan zat gizi subjek termasuk defisit dari kebutuhan. Lebih dari setenagh subjek memiliki tingkat aktivitas fisik kategori ringan dengan rata-rata nilai MET sebesar 504,07±3,63. Tidak ada hubungan yang signifikan antara tingkat kecukupan zat gizi dengan status gizi, aktivitas fisik dengan status gizi, tingkat staging dengan kecukupan zat gizi, aktivitas fisik, dan status gizi (p>0,05). Namun, terdapat hubungan signifikan antara frekuensi kemoterapi dengan aktivitas fisik (p<0,05).
Keyword: breast cancer, nutritional adequacy level, nutritional status, physical activity

Judul: Dietary Inflammatory Level and Nutritional Status of Breast Cancer Patients at RSUD Kota Bogor, Dietary Inflammatory Level and Nutritional Status of Breast Cancer Patients at RSUD Kota Bogor
Abstrak: Penelitian ini bertujuan menganalisis perbedaan antara kelompok stadium (stadium awal dan stadium lanjut) dalam hal tingkat inflamasi diet (skor Dietary Inflammatory Index/ DII) dan status gizi. Desain penelitian ini adalah cross-sectional study dengan menggunakan accidental sampling yang melibatkan 93 subjek di instalasi hematologi onkologi RSUD Kota Bogor pada periode penelitian. Pengumpulan data dilakukan dengan wawancara langsung menggunakan kuesioner dan rekam medis subjek. Hasil penelitian menunjukkan stadium kanker payudara subjek didominasi kategori advanced stage (82,8%). Rata-rata skor DII subjek adalah 1,857 (pro-inflamasi) dengan 76,3% subjek memiliki tingkat inflamasi diet yang bersifat pro-inflamasi. Status gizi subjek mayoritas dalam rentang IMT normal (40,9%). Tidak ditemukan perbedaan signifikan antara stadium awal dan stadium lanjut dalam hal skor DII (p-value=0,555), status gizi (p-value=0,637), dan IMT (p-value=0,676). Sementara itu, ditemukan korelasi negatif signifikan antara skor DII dengan tingkat pendapatan dan pendidikan, dengan masing-masing p-value=0,03 dan r=-0,225., This study aims to analyze the differences between the staging groups (early stage and advanced stage) in terms of dietary inflammation level (Dietary Inflammatory Index/DII score) and nutritional status. The design of this study was a cross-sectional study using accidental sampling involving 93 subjects at the hematology-oncology polyclinic at RSUD Kota Bogor during the study period. Data collection was carried out by direct interviews using questionnaires and the subject's medical records. The results showed that the subject's breast cancer stage was dominated by the advanced stage category (82,8%). The subject's average DII score was 1.857 (pro-inflammatory) with 76.3% of subjects having a pro-inflammatory diet inflammatory level. The nutritional status of the majority of subjects was within the normal BMI range (40.9%). There was no significant difference between early stage and advanced stage in terms of the DII score (p-value=0.555), nutritional status (p-value=0.637), and BMI (p-value=0.676). Meanwhile, a significant negative correlation was found between DII scores and levels of income and education, with p-value=0.03 and r=-0.225, respectively.
Keyword: breast cancer stage, Dietary Inflammatory Index (DII), nutritional status

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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