Computational modelling
Development of a lean maturity assessment model using interval-valued spherical fuzzy AHP method

Alper Kiraz; Asiye Yücedag Gürel

Volume 13, Issue 1 , March 2024, , Pages 25-47

https://doi.org/10.22105/riej.2023.424690.1403

Abstract
  Continuously adding value to a company's products and services is inevitable in adapting to this evolving and challenging global market. That is why lean philosophy is becoming increasingly important and popular among companies, and they are relying more and more on it. It not only assists in increasing ...  Read More

Computational modelling
Amplified black hole algorithm for real power loss reduction

L. Kanagasabai

Volume 9, Issue 2 , June 2020, , Pages 130-142

https://doi.org/10.22105/riej.2020.214468.1114

Abstract
  This work presents Amplified Black Hole Algorithm (ABHA) for solving optimal reactive power problem. In the projected approach ABHA, Gravitational Search Algorithm (GSA) is merged with Black Hole Algorithm (BHA). Power loss reduction is the key objective in the proposed work. The gravitational force ...  Read More

Computational modelling
Option pricing on sesame price using jump diffusion models

T. Berhane; M. Adam; G. Awgichew; E. Haile

Volume 9, Issue 1 , March 2020, , Pages 25-45

https://doi.org/10.22105/riej.2020.209020.1104

Abstract
  In this paper, we aim at developing a model for option pricing to reduce the risks associated with Ethiopian sesame price fluctuations. The White Humera Gondar Sesame Grade 3 (WHGS3) price, which is recorded from 5 November 2010 to 30 March 2018 at Ethiopia Commodity Exchange (ECX) market, is used to ...  Read More