Judul: Pengetahuan, persepsi, sikap, dan perilaku membaca label informasi gizi pada mahasiswa
Abstrak: Label informasi gizi merupakan label yang memuat informasi mengenai kandungan gizi di dalam produk pangan yang menjadi media sangat penting untuk mentransfer informasi mengenai karakteristik dari suatu produk pangan. Tujuan penelitian ini adalah untuk menganalisis pengaruh karakteristik individu, karakteristik keluarga, pengetahuan, persepsi, dan sikap terhadap perilaku membaca label informasi gizi produk pangan pada mahasiswa Strata Satu (S1) Institut Pertanian Bogor. Disain penelitian ini menggunakan cross sectional study dengan metode survei yang dilakukan di Kampus Institut Pertanian Bogor (IPB), Kecamatan Dramaga, Kabupaten Bogor. Penelitian ini melibatkan 400 mahasiswa IPB yang dipilih dengan menggunakan teknik multistage random sampling dengan lapis jenis kelamin. Terdapat perbedaan nyata antara responden laki-laki dan perempuan dalam hal pengetahuan, sedangkan persepsi, sikap, dan perilaku membaca label informasi gizi tidak berbeda nyata. Sikap berpengaruh nyata terhadap perilaku membaca label informasi gizi., Nutrition labels is a label that contains information about nutrition in a food product which become very important media to transferring information about characteristic in a food product. The aim of this research was to analyze the effect of individuals characteristics, family’s characteristics, knowledge, perception, and attitude on reading behavior of nutrition labels of undergraduate students of Bogor Agricultural University. The design of this research used cross sectional study with survey method which conducted in Bogor Agricultural University, Dramaga district, Bogor regency. This research involved 400 Bogor Agricultural University’s students selected by multistage random sampling based on gender. There was significant difference between male and female for knowledge, meanwhile the difference was not appear significant for perception, attitude, and reading behavior of nutrition labels. Attitude influenced on reading behavior of nutrition labels.
Keyword: label informasi gizi, pengetahuan, persepsi, perilaku membaca label, sikap

Judul: The Differences in Knowledge, Attitudes, and  Behavior in Reading Nutrition Label between Nutrition and Non-Nutrition Students  of IPB University
Abstrak: Label gizi merupakan salah satu bentuk pengaturan diet sebagai upaya mencegah meningkatnya angka penyakit tidak menular. Namun, kebiasaan masyarakat Indonesia dalam membaca label gizi tergolong kurang, tidak terkecuali kelompok mahasiswa gizi yang seharusnya terbiasa membaca label gizi karena mempunyai pengalaman belajar label gizi dalam perkuliahan. Penelitian ini bertujuan mengetahui perbedaan pengetahuan, sikap, dan perilaku membaca label gizi antara mahasiswa gizi dan nongizi IPB University. Penelitian ini menggunakan desain studi comparative cross-sectional yang dilaksanakan pada Mei-Juni 2024. Data penelitian diperoleh menggunakan kuesioner daring yang terdiri atas 41 pertanyaan utama (10 pengetahuan, 13 sikap, dan 18 perilaku) yang disebar kepada 51 mahasiswa gizi dan 51 mahasiswa nongizi. Hasil uji beda menunjukkan perbedaan signifikan (p<0,05) pada pengetahuan label gizi, sikap terhadap label gizi, dan perilaku membaca label gizi antara mahasiswa gizi dan nongizi. Namun, sebagian besar perilaku mahasiswa gizi berada pada kategori perilaku tidak baik., Nutrition labeling is a form of dietary regulation as an effort to prevent the increase of non-communicable diseases. However, the habit of Indonesian people in reading nutrition labels is still lacking, including nutrition students who should be accustomed to reading nutrition labels because they have experience studying nutrition labels in lectures. This study aims to determine the differences in knowledge, attitudes, and behavior of reading nutrition labels between nutrition and non-nutrition students of IPB University. This study used a cross-sectional comparative study design conducted in May-June 2024. Research data were obtained using an online questionnaire consisting of 41 main questions (10 knowledge, 13 attitudes, and 18 behaviors) distributed to 51 nutrition students and 51 non-nutrition students. T-test results showed significant differences (p<0.05) in nutrition label knowledge, attitudes towards nutrition labels, and nutrition label reading behavior between nutrition and non-nutrition students. However, most of the nutrition students' behavior fell into the category of poor behavior.
Keyword: pengetahuan, perilaku, Sikap, label gizi

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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