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.
Keyword: 

Judul: Studi Knowledge, Attitude, and Practice (KAP) Higiene Pangan pada Food Handler di Kios Makanan di Dalam dan Luar Kampus IPB Dramaga, Bogor
Abstrak: Food besides giving benefit for human health is also easy to be contaminated with various contaminants so that can cause disease (foodborne disease). One of many factors influencing incidence of foodborne disease is food handler. Important factors on food handlers which have impacts on food hygiene are knowledge, attitude, and practice. The purpose of this study was to determine the level of knowledge, attitudes, and practices; correlation between knowledge, attitudes, and practices; and risk factors of food hygiene practices. Total of 77 kiosks from 373 food kiosks inside and outside of IPB campus in Dramaga, Bogor was sampled randomly. The data include characteristics and KAP food handler which is obtained from interviews with respondents using questionnaires and observations, and level surface sanitizing food handlers hands and dishes in kiosks with RODAC test (total plate count and the number of Staphylococcus aureus). This study showed that most of the food handlers were categorized as good in knowledge (55.8%) and practices (70.1%), while most of food handlers’ attitude were categorized as moderate (51.9%). The level of hygiene in food kiosks was mostly good (76.6%). Risk factors which influenced on hygiene level in food kiosks were age (young age, OR = 12.6), the participation in extension (never exposed to extension, OR = 8.3), and attitude (bad attitude, OR = 43.7). Characteristic variables that had significant correlation with knowledge, attitude, and practice were the correlation between extension and knowledge (r = 0.59), monitoring and knowledge (r = 0.63), work experience and attitude (r = 0.35), purpose of business and attitude (r = 0.51), extension and attitude (r = 0.53), and age and practice (r = 0.71). This study showed significant correlation (p<0.05) between knowledge and attitude (r=0.73), knowledge and practice (r=0.79), and attitude and practice (r=0.84). More than half of food kiosks showed bad sanitation level of hands and plates. Practice of personal hygiene showed significant correlation with score the number of Staphylococcus aureus in food handler hand (r=0.15). The results of this study should be considered as potential threat to consumer health inside and outside of IPB campus in Dramaga, Bogor.
Keyword: 

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.
Keyword: