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Perubahan pengetahuan penjamah makanan hotel setelah penyuluhan higiene perorangan Kusuma, Hapsari Sulistya; Pasanda, Amalia; Nugraheni, Kartika; Nissa, Choirun
Jurnal Gizi Indonesia (The Indonesian Journal of Nutrition) Vol 6, No 1 (2017)
Publisher : Department of Nutrition Science, Faculty of Medicine, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.531 KB) | DOI: 10.14710/jgi.6.1.71-75

Abstract

Background : Personal hygiene food handlers in food processing is very important because with the application of good hygiene can minimize the possibility of food contamination. The personal hygiene can be influenced by some factors, for instance knowledge and behaviors of food handlers. Lack of knowledge, inappropriate behaviors towards personal hygiene can be changed by giving the right information. Objective : This study aims to determine differences in knowledge of food handlers before and after counseling.Methods : This was a quasi-experimental one group pretest posttest design. The sample of this study was 18 food handlers in Patra Jasa Hotel selected by total sampling method. Knowledge data obtained from the total score from the correct answer in the questionnaire. The data was analyzed using Wilcoxon test.Results : This study showed that the increases in knowledge of food handlers increased by 22%. Statistical analysis showed knowledge before and after nutrition extension (p = 0.001).Conclusions : there was difference in knowledge of food handlers before and after personal hygiene counseling.
SIMULASI PERGERAKAN TUMPAHAN MINYAK DI LAUT DENGAN PENGARUH ANGIN Millah, Nashrul; Anggriani, Indira; Nugraheni, Kartika
SPECTA Journal of Technology Vol 3 No 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v3i2.67

Abstract

As a petroleum-producing country, Indonesia has a very important role in supplying national and international petroleum needs. The distribution of oil by sea raises the risk of spills and harms the marine environment, especially for marine life. Most oil spills in the marine environment can form a thin layer on the surface due to the movement of wind, waves, and currents. In this study, the oil spill movement model used the Shallow Water Equation (SWE) model and the equation for the movement of oil spills. The SWE model consists of the equation of mass and momentum derived from the law of conservation of mass which is derived into the equation of continuity and the law of conservation of momentum which is derived into the equation of conservation of momentum. In this model, ocean currents are affected by several disturbances in the form of wind gusts and friction with the bottom. The model is solved numerically through simulation using the finite volume method. Discretization is done by using a staggered grid approach, where the mass and momentum variables are discretized in different cells. From the simulation results, it appears that the movement of oil spills is influenced by wind direction and current. The simulation results also found that the speed of the movement of oil spills has increased in the early times, but then gradually.  
Dynamics of a Fractional Order Eco-Epidemiological Model Nugraheni, Kartika; Trisilowati, Trisilowati; Suryanto, Agus
Journal of Tropical Life Science Vol 7, No 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.09

Abstract

In this paper, we propose a fractional order eco-epidemiological model. We considere the existence of time memory in the growth rate of the three populations. We observed the dynamical behaviour by analysing with fractional order and then simulateing using Grünwald-Letnikov approximation to support analytical results. It found that the model has five equilibrium points, namely the origin, the survival of susceptible prey, the predator free equilibria, the infected prey free equilibria, the interior equilibria. Numerical simulations show that the existence of fractional order  is a factor which affects the behaviour of solutions.Â