Pusan National University

About: Pusan National University is a education organization based out in Busan, South Korea. It is known for research contribution in the topics: Catalysis & Population. The organization has 24124 authors who have published 45054 publications receiving 819356 citations. The organization is also known as: Busan National University & Pusan University.

Optimal treatment of an SIR epidemic model with time delay

Abstract: In this paper the optimal control strategies of an SIR (susceptible-infected-recovered) epidemic model with time delay are introduced. In order to do this, we consider an optimally controlled SIR epidemic model with time delay where a control means treatment for infectious hosts. We use optimal control approach to minimize the probability that the infected individuals spread and to maximize the total number of susceptible and recovered individuals. We first derive the basic reproduction number and investigate the dynamical behavior of the controlled SIR epidemic model. We also show the existence of an optimal control for the control system and present numerical simulations on real data regarding the course of Ebola virus in Congo. Our results indicate that a small contact rate(probability of infection) is suitable for eradication of the disease (Ebola virus) and this is one way of optimal treatment strategies for infectious hosts.

Experimental study of the decay KL0→π0νν̄

Abstract: The first dedicated search for the rare neutral-kaon decay K{sub L}{sup 0{yields}{pi}0{nu}{nu}} has been carried out in the E391a experiment at the KEK 12-GeV proton synchrotron. The final upper limit of 2.6x10{sup -8} at the 90% confidence level was set on the branching ratio for the decay.