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Browsing by Author "Kassa, Semu Mitiku"

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Analysis of the mitigation strategies for COVID-19: from mathematical modelling perspective

Kassa, Semu Mitiku; Njagarah, John Boscoh Hatson; Terefe, Yibeltal Adane (Elsevier, 2020-09)

In this article, a mathematical model for the transmission of COVID-19 disease is formulated and analysed. It is shown that the model exhibits a backward bifurcation at R0=1 when recovered individuals do not develop a ...
Hierarchical multilevel optimization with multiple-leaders multiple-followers setting and nonseparable objectives

Zewde, Addis Belete; Kassa, Semu Mitiku (EDP Sciences, 2021-09-18)

Hierarchical multilevel multi-leader multi-follower problems are non-cooperative decision problems in which multiple decision-makers of equal status in the upper-level and multiple decision makers of equal status are ...
An iterative method for tri-level quadratic fractional programming problems using fuzzy goal programming approach

Kassa, Semu Mitiku; Tsegay, Teklay Hailay (Springer, 2017-08-01)

Tri-level optimization problems are optimization problems with three nested hierarchical structures, where in most cases conflicting objectives are set at each level of hierarchy. Such problems are common in management, ...
Modeling the effects of information-dependent vaccination behavior on meningitis transmission

Buonomo, Bruno; d'Onofrio, Alberto; Kassa, Semu Mitiku; Workineh, Yetwale Hailu (Wiley, 2021-08-21)

We propose a mathematical model to investigate the effects of information–dependent vaccination behavior on meningitis transmission. The information is represented by means of information index as early proposed by d'Onofrio ...
Optimal control of the spread of meningitis: in the presence of behaviour change of the society and information dependent vaccination

Workineh, Yetwale Hailu; Kassa, Semu Mitiku (SCIK Publishing Corporation, 2021-04-05)

A mathematical model of meningococcal meningitis with incidence dependent self-protection measure and vaccination is formulated and analysed. The vaccination considered is assumed to be given to everyone and is information ...
Optimal control strategy for TB-HIV/AIDS co-infection model in the presence of behaviour modification

Awoke, Temesgen Debas; Kassa, Semu Mitiku (MDPI AG, 2018-05-01)

A mathematical model for a transmission of TB-HIV/AIDS co-infection that incorporates prevalence dependent behaviour change in the population and treatment for the infected (and infectious) class is formulated and analyzed. ...
Threshold dynamics of the plant-herbivore interaction with Allee effect

Asfaw, Manalebish Debalike; Kassa, Semu Mitiku; Lungu, Edward M. (Botswana International University of Science and Technology ( BIUST), 2017-06)

Different species, like plants and herbivores, that are occupying similar ecosystems and living among each other interact regularly. In this interaction, understanding the conditions in which coexistence equilibrium occurs ...
Two stage stochastic bilevel programming using Stochastic Systematic Evolutionary(SSE) method

Goshu, Natnael Nigussie; Kassa, Semu Mitiku (Botswana International University of Science and Technology, 2019-06)

Stochastic bilevel programming is a bilevel program having some form of randomness in the problem definition. The main objective is to optimize the leader’s (upper level) stochastic programming problem, where the ...

Browsing by Author "Kassa, Semu Mitiku"

Browsing by Author "Kassa, Semu Mitiku"

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