Judul: Gambaran Higiene Personal Pekerja Kantin di Kampus IPB Dramaga melalui Pengujian Staphylococcus aureus
Abstrak: Personal hygiene is very important in food handling practices. Improper personal hygiene of the food handler can cause foodborne illness due to the occurrence of Staphylococcus aureus. The aim of this study was to observe the occurrence of S. aureus from hands and clothes of food handlers in canteens the Bogor Agriculture University Dramaga. Thirty nine food handlers were chosen randomly from sixty seven food handlers become respondents for questionnaire about personal hygiene in handling food and detecting S. aureus on hand and clothes. The detection of S. aureus on hands and clothes was used RODAC method and analysed for the presence of S. aureus in order to assess the levels of contamination and to establish possible relationships. A majority respondents had good practices of personal hygiene. Staphylococcus aureus was detected on 100% of hands and clothes samples of food handlers. Nevertheless, the correlation between the occurance of S. aureus on hands and clothes of food handlers was not significant statistically (P>0.05). It is necessary to have a great attention to the presence of S. aureus on hands of food handlers in the university canteen since it could be the source of pathogen cross contamination to the food that can cause foodborne illness.
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Judul: Tingkat Sanitasi Tangan Food Handler di Warung Makanan Sekitar Kampus Institut Pertanian Bogor Dramaga
Abstrak: This research was conducted in order to describe the sanitary condition of food kiosks around IPB Dramaga through amount of Staphylococcus aureus on food handler’s hands. Total of 42 food kiosks around IPB Dramaga were selected randomly as the respondents. The research was conducted with cross sectional study. Data was collected by interviewing the respondents using the questionnaires and examining total of Staphylococcus aureus from hands using replicate organism direct agar contact (RODAC). Data was analyzed descriptively. The results showed that the majority of respondents were adult and elder (73.8%), had low educational level (57.1%) and selling experience under 10 years (69.1%), never attended the training about food safety (71.4%), and never found out the health department supervision (71.4%). Based on RODAC analysis showed that 59.5% of food handler’s were contaminated by Staphylococcus aureus belong to high contamination. Thus it was concluded that the sanitation of food kiosks and personal hygiene were still low.
Keyword: Staphylococcus aureus, food handler

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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