Judul: Efektivitas Program Keamanan Pangan Terhadap Perubahan Pengetahuan Anak Serta Orang Tua
Abstrak: Food safety knowledge of students and parents’ need to be improved to minimize the risk of food poisoning which most cases occured at home and school. The aim of this research was to determine the effectivity from various food safety programs that have held at school towards the improvement of food safety knowledge among primary school students, and their parents’ behavior. The survey data gained from 397 primary school students and 195 parents were analyzed using SPSS through contingency and spearman analysis methods. The result affirming activities which significantly associated with the improvement of primary school students’ knowledge in West-part of Indonesia were pasting food safety poster and establishing of food safety team, while in East-part of Indonesia were pasting food safety poster and conducting food safety extension. The result of spearman correlation revealed that parents’ educational level had no effect over the improvement of primary school students’ knowledge about food safety (p= 0.276 >α= 0.05).
Keyword: Bogor Agricultural University (IPB), student knowledge, primary school student, parent, food safety

Judul: Pengaruh program keamanan pangan di sekolah terhadap pengetahuan penjaja pangan jajanan dan siswa Sekolah Dasar
Abstrak: Edukasi keamanan pangan bagi penjaja pangan jajanan anak sekolah (PJAS) merupakan hal yang harus dilakukan guna meningkatkan pengetahuan keamanan pangan. Hal ini juga penting bagi siswa sekolah dasar (SD), karena pengetahuan keamanan pangan akan berpengaruh pada pemilihan produk pangan yang akan dikonsumsi. Penelitian ini bertujuan untuk mengetahui kategori pengetahuan penjaja PJAS mengenai keamanan pangan dan pengaruh program keamanan pangan di sekolah terhadap pengetahuan penjaja PJAS, serta pengaruh penyuluhan keamanan pangan terhadap pengetahuan keamanan pangan siswa SD. Data hasil survei dari 20 provinsi di Indonesia diolah menggunakan program SPSS dengan metode analisis Pearson dan paired sample t-test. Hasil analisis menunjukkan bahwa 71.96% penjaja PJAS masih memiliki pengetahuan keamanan pangan yang kurang, dan hanya sebesar 28.04% penjaja PJAS yang memiliki pengetahuan keamanan pangan baik. Analisis antar variabel menunjukkan bahwa tidak ada pengaruh yang signifikan antara program keamanan pangan, yaitu (1) adanya peraturan keamanan pangan di sekolah dan (2) pemberian penyuluhan oleh sekolah terhadap pengetahuan keamanan pangan penjaja PJAS. Bagi siswa SD penyuluhan keamanan pangan memberikan peningkatan pengetahuan sebesar 19.41%., The importance of food safety education in order to enrich food safety knowledge of food vendor in elementary school (ES) should not be neglected. Not to mention, for elementary school students that could interfere their preference of food product. The aim of this study were to determine the level of food safety knowledge of food vendor, the impact of food safety program to food understanding, and the influence of food safety education toward ES students' knowledge. The data gained from 20 provinces in Indonesia were analyzed using SPSS through pearson analysis method and paired sample t-test. The result revealed that 71.96% of food vendors possessed a poor knowledge, and only 28.04% had a good knowledge about food safety. The result of analysis between variable showed that there was no significant effect of food safety programs, which were (1) the implementation of food safety regulations in school and (2) the application of food safety extension from school to food vendors. Food safety extension to ES students increased student knowledge of food safety up to 19.41%.
Keyword: penjaja, pangan jajanan anak sekolah, siswa sekolah dasar

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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