IMPLEMENTASI KEBIJAKAN SISTEM ZONASI PADA PENERIMAAN PESERTA DIDIK BARU (PPDB) 2019/2020 DI KOTA YOGYAKARTA

The acceptance of new students (PPDB) using the zoning system was first implemented in Yogyakarta in 2018/2019. This zoning system aims to equalize education and improve the quality of education. This research was conducted to find out how the zoning system policy in Yogyakarta city under the auspices of the Yogyakarta City Education Office. This research uses qualitative approach with case study method. The results of the study showed that the zoning system in Yogyakarta has changed from the previous year. In 2019/2020 the zoning system provides a 10% chance of superior seeds, 30% of school zones, 10% of poor learners, 40% of quality pathways, 5% of out-of-school zoning pathways, and 5% of special pathways such as prospective learners whose parents moved from other regions to Yogyakarta. With this zoning system, the whole community has the opportunity to get a good quality education.

Mathematical Modeling and Optimal Control of a Vector Borne Disease

This dissertation is concerned with mathematical modeling and optimal control of a vector borne disease. We derive and rigorously analyze mathematical models to better understand the transmission and spread of vector borne diseases. First, a mathematical model is formulated to evaluate the impact of biological control of a vector borne disease "malaria" by considering larvivorous fish as a sustainable larval control method. To evaluate the potential impacts of this biological control measure on malaria transmission, we investigate the model describing the linked dynamics between the predator-prey interaction and the host-vector interaction. The dynamical behavior with all possible equilibria of the model is presented. The model also exhibits backward bifurcation phenomenon which give rise to the exis- tence of multiple endemic equilibria. The backward bifurcation phenomenon sug- gests that the reproductive number R 0 < 1 is not enough to eliminate the disease from the population under consideration. So an accurate estimation of parameters and level of control measures is important to reduce the infection prevalence of malaria in an endemic region. Our control techniques for elimination of malaria in a community suggest that the introduction of larvivorous fish can in principle have important consequence for the control of malaria but also indicate that it would require a strong predator on larval mosquitoes. Then, a new epidemic model of a vector-borne disease which has both direct and the vector mediated transmissions is considered. The model incorporates bilinear contact rates between the mosquitoes vector and the humans host populations. Using Lyapunov function theory some sufficient conditions for global stability of both the disease-free equilibrium and the endemic equilibrium are obtained. We derive the basic reproduction number R 0 iiiii and establish that the global dynamics are completely determined by the values of R 0 . For the basic reproductive number R 0 < 1, the disease free equilibrium is glob- ally asymptotically stable, while for R 0 > 1, a unique endemic equilibrium exists and is globally asymptotically stable. The model is extended to assess the impact of some control measures, by using an optimal control theory. In order to do this, first we show the existence of the control problem and then use both analytical and numerical techniques to investigate that there are cost effective control efforts for prevention of direct and indirect transmission of disease. Finally, we present complete characterization and numerical simulations of the optimal control prob- lem. In order to illustrate the overall picture of the epidemic, individuals under the optimal control and without control are shown in figures. Our theoretical results are confirmed by numerical simulations and suggest a promising way for the control of a vector borne disease.