Judul: Body Image of Adolescent Girls at High School Level in  East Nusa Tenggara
Abstrak: Perubahan bentuk tubuh menjadikan remaja lebih memerhatikan bentuk tubuh sehingga tidak sedikit remaja yang memiliki body image negatif. Penelitian ini bertujuan menganalisis hubungan pengetahuan gizi dan karakteristik subjek dengan body image pada remaja putri tingkat sekolah menengah atas di Nusa Tenggara Timur tahun 2019. Desain studi yang digunakan berupa cross sectional study dengan jumlah subjek 900 orang. Hasil penelitian menunjukan usia subjek berada pada rentang 16–22 tahun. Hasil penelitian status gizi subjek menunjukan sebagian besar remaja putri memiliki status gizi normal (72,3%) dengan body image positif (61,0%). Penggunaan media massa sebagian besar remaja putri tergolong lama (58,9%). Uang saku yang dimiliki remaja putri sebagian besar ≤ Rp15.000,00 per hari (91,0%). Sebagian besar remaja putri memiliki pengetahuan gizi yang tergolong sedang (71,9%). Status gizi berhubungan signifikan dengan body image (p<0,05). Namun, tidak terdapat hubungan signifikan antara media massa, uang saku, dan pengetahuan gizi dengan body image (p>0,05). Kata kunci: body image, pengetahuan gizi, remaja putri, status gizi, Changes in body shape are generating negative body image in a lot of adolescent girls, mainly because they pay more attention to their body shape. This study aims to analyze the correlation of nutritional knowledge and subject characteristics with the body image of adolescent girls at the high school level in East Nusa Tenggara 2019. The study design used was a cross-sectional study with 900 subjects. The results showed that the age of the subjects was in the range of 16–22 years old. The results of this study showed most subjects have normal nutritional status (72.3%) with positive body image (61.0%). The duration of mass media usage for adolescent girls is mostly long (58.9%). Most of the allowance owned by adolescent girls is IDR 15.000,00 a day (91.0%). Most adolescent girls had middle nutritional knowledge (71.9%). Nutritional status has a significant correlation with body image (p<0.05). However, there was no significant correlation between mass media, pocket money, and nutritional knowledge with body image (p>0.05). Keywords: adolescent girls, body image, nutritional knowledge, nutritional status
Keyword: adolescent girls, body image, nutritional knowledge, nutritional status

Judul: Study about Body Image, Eating Habit, and Nutritional Status of Female Student at SMAN 1 Ciomas
Abstrak: Penelitian ini bertujuan mengetahui hubungan antara body image, kebiasaan makan, dan status gizi pada siswi di SMAN 1 Ciomas. Desain penelitian yang digunakan adalah cross sectional study dengan subjek berjumlah 65 siswi kelas X dan XI di SMAN 1 Ciomas. Hasil penelitian ini menunjukan bahwa berdasarkan metode Figure Rating Scale (FRS), sebanyak 60% subjek memiliki body image positif. Namun, terdapat 11 dari 16 subjek yang berstatus gizi normal dengan body image negatif yang menganggap bentuk tubuhnya saat ini belum ideal dan menginginkan bentuk tubuh yang lebih langsing. Sedangkan berdasarkan metode Multidimensional Body-Self Relations Questionnaire-Appearance Scale (MBSRQ-AS) sebanyak 67,7% subjek memiliki body image normal dan 16,9% memiliki body image positif. Subjek memiliki kebiasaan makan yang tergolong baik (56,9%). Sebagian besar subjek (78,5%) memiliki status gizi normal berdasarkan IMT/U. Terdapat hubungan yang signifikan antara subskala MBSRQ-AS evaluasi penampilan dengan status gizi (p= 0,021: r= 0,286). Tidak terdapat hubungan yang signifikan antara body image dengan status gizi dan status gizi dengan kebiasaan makan. Kata kunci : body image, kebiasaan makan, remaja perempuan, status gizi, This study aims to determine the relationship between body image, eating habits, and nutritional status of female student at SMAN 1 Ciomas. The design of study was cross sectional study with 65 female students in 1st and 2nd grade at SMAN 1 Ciomas as the subject. The results showed that based on the FRS method, 60,0% of the subjects had positive body image perception. The results of this study indicate that based on the Figure Rating Scale (FRS) method, 60% of the subjects have a positive body image. However, there were 11 out of 16 subjects with a normal nutritional status that have negative body images who consider their current body shape to be not ideal and want a slender body shape. Meanwhile, based on the MBSRQ-AS method, 67,7% of the subject had normal body image perception and 16,9% had positive body image perception. Subjects tend to had healthy eating habits (56,9%). Most of the subjects (78,5%) had normal nutritional status based on BMI for Age. There was a significant correlation between the MBSRQ-AS’s subscale appearance evaluation with nutritional status (p= 0,021: r= 0,286). There was no significant correlation between body image perception with nutritional status and nutritional status with eating habit. Key words: body image, eating habit, female adolescence, nutritional status
Keyword: body image, eating habit, female adolescence, 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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