Judul: Hubungan persepsi tubuh dengan gangguan makan pada mahasiswa
Abstrak: Tujuan penelitian ini adalah mengetahui hubungan persepsi tubuh dengan gangguan makan pada mahasiswa. Desain penelitian ini cross sesctional study pada mahasiswa baru Program Studi Ilmu Gizi di Institut Pertanian Bogor (IPB) dengan jumlah 120 remaja. Hasil studi menunjukkan proporsi subjek dengan status gizi normal 83.3%, 10.0% overweight, 4.2% obesitas dan 2.5% kurus. Penilaian MBSRQ-AS diperoleh subjek memiliki persepsi negatif terhadap evaluasi penampilan sebesar 80%, orientasi penampilan 99.2%, dan kepuasan terhadap bagian tubuh 80.8%; sedangkan 57.5% subjek cemas menjadi gemuk dan 71.7% subjek perempuan memiliki persepsi negatif terhadap kategori ukuran tubuh. Tidak terdapat gangguan makan pada subjek laki-laki sedangkan 7.8% subjek perempuan mengalami gangguan makan dengan risiko lebih karena merasa memiliki keinginan untuk makan terus-menerus dan tidak dapat berhenti makan (2-3x sebulan). Terdapat hubungan yang signifikan antara persepsi tubuh (MBSRQ-AS) pada subskala kecemasan menjadi gemuk dengan gangguan makan (p<0.05). Namun tidak terdapat hubungan yang signifikan pada subskala yang lain dan antara persepsi tubuh (FRS) dan (BIQ) dengan gangguan makan (p>0.05)., The objective of this study was to determine the relationship of body image perception and eating disorders in undergraduated students. The design of this study is cross sectional with new students that major in nutritional program in Bogor Agricultural University (IPB) with the number was 120 students. The result showed that the proportion of subjects with normal nutritional status is 83.3%, 10.0% overweight, 4.2% obesity and 2.5% thin. MBSRQ-AS’ assessment obtained that subjects have negative perception of appearance evaluation is 80%, appearance orientation 99.2% and body areas satisfaction 80.8%; whereas 57.5% subjects is anxious of being fat and 71.7% female subject has negative perception of self-classified weight. There wasn’t eating disorders in male, whereas 7.8% female subject have eating disorders with more risk (have attitute the desire to eat continously and can’t stop eating 2-3 times a month). There was significant correlation between body image perception (MBSRQ-AS) in overweight preoccupation subscale with eating disorders (p<0.05). However there were no significant correlations for other subscales and between body image perception of FRS and BIQ and eating disorders (p>0.05).
Keyword: gangguan makan, mahasiswa, persepsi tubuh

Judul: Correlation Between Eating Behavior and Body Image with Nutritional Status among High School Students in Bogor
Abstrak: Dewasa ini remaja mulai memerhatikan perubahan fisik yang terjadi pada mereka dan tak jarang merasa tidak puas dengan bentuk tubuh yang dimiliki. Hal tersebut dapat mendorong remaja untuk melakukan upaya-upaya tertentu untuk membuat bentuk tubuh sesuai keinginannya, seperti membatasi asupan makan dan melakukan diet berlebih yang dapat memengaruhi perilaku makan, persepsi diri terhadap citra tubuh, dan status gizi. Penelitian ini bertujuan untuk menganalisis hubungan antara perilaku makan dan body image dengan status gizi siswa SMA di Kota Bogor. Desain penelitian ini adalah cross-sectional study. Jumlah sampel yang digunakan sebanyak 114 siswa SMA di Kota Bogor. Pengumpulan data dilakukan melalui wawancara dan self-administered secara online. Sebagian besar subjek memiliki status gizi normal (81,6%), tergolong dalam tipe perilaku makan external eating (75,4%), memiliki persepsi body image negatif (51,8%), dan memiliki kebiasaan makan yang kurang baik (53,5%). Terdapat hubungan signifikan antara status gizi siswa SMA dengan perilaku makan restrained eating (p=0,018) dan body image (p=0,000). Tidak terdapat hubungan signifikan antara perilaku makan emotional eating dan external eating terhadap status gizi (p>0,05). Dapat disimpulkan bahwa perilaku makan dan persepsi body image memengaruhi status gizi siswa., These days, adolescence begine to pay attention to the physical changes that occur to them and often feel dissatisfied with their body shape. This can encourage adolescents to make certain efforts to make the body shape according to their wishes, such as limiting food intake and doing excessive diets that can affect eating behavior, body image, and nutritional status. The purpose of this study was to analyze the correlation between eating behavior and body image with nutritional status among high school students in Bogor. The design of this study was a cross-sectional study. The number of samples used in this study were 114 high school students. Data was collected through interviews and self-administrated online. Most of the subjects had normal nutritional status (81.6%), belonged to the external eating behavior (75.4%), have a negative body image perception (51.8%), had unhealthy eating habits (53.5%). There is a significant relationship between nutritional status in high school students with restrained eating (p=0.018) and body image (p=0.000). However, there is no significant relationship between emotional eating and external eating behavior on nutritional status (p>0.05). It can be concluded that eating behavior and perception of body image affect the nutritional status of students.
Keyword: adolescent, body image, nutritional status, food habits, eating behavior

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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