Research Paper Scheduling
1. A mathematical model for integrated operating room and surgical member scheduling considering lunch break

M. Hamid; R. Tavakkoli-Moghaddam; B. Vahedi-Nouri; H. Arbabi

Volume 9, Issue 4 , Autumn 2020, Pages 304-312

http://dx.doi.org/10.22105/riej.2021.263608.1175

Abstract
  Operating rooms (ORs) are among the most influential departments of a hospital that a major portion of its expenditures and revenues originate from it. Due to the limited resources and the presence of different stockholders, effective management, and the optimal planning of this department are challenging. ...  Read More

Short Communication Computational Intelligence
2. A short communication article on contactless menu

K Shweta Ranjan; B. Singh; D. Aggarwal

Volume 9, Issue 4 , Autumn 2020, Pages 313-317

http://dx.doi.org/10.22105/riej.2020.260957.1162

Abstract
  In this Pandemic situation after dealing with contactless delivery, we introduce a "contactless menu", this feature help restaurants to gain the trust and confidence of customers in their safety and hygiene measures post-lockdown. The contactless menu will have two main components and, in the future, ...  Read More

Research Paper Mathematical modelling
3. Applying mathematical modeling to create job rotation for improve workforce performance in semi-automatic systems

M. Bakhshi; S. E. Hashemi; H. Dezhdar

Volume 9, Issue 4 , Autumn 2020, Pages 318-327

http://dx.doi.org/10.22105/riej.2020.243223.1140

Abstract
  In this research, we present a mathematical model for allocating people to different jobs and shifting employees between related jobs. This action will reduce the repetitive activities workload and ergonomic risks at the planned time horizon, and finally increases the organization's efficiency. In this ...  Read More

Research Paper Manufacturing and Logistics
4. Cost minimization of artificial hip bone implantation surgery by adopting additive manufacturing technique and its feasibility assessment

N. Zahan; F. I. Jony; Kh. Nahar

Volume 9, Issue 4 , Autumn 2020, Pages 328-336

http://dx.doi.org/10.22105/riej.2020.257506.1148

Abstract
  Osteoarthritis (OA) of the hip is the most common joint disease in elderly people and associated with significant physical disability. Pain relief is a primary treatment of hip OA. When the patient with hip OA has failed medical treatment modalities and remains in pain, the patient should be referred ...  Read More

Research Paper Computational Intelligence
5. Content based movie recommendation system

N. Pradeep; K. K. Rao Mangalore; B. Rajpal; N. Prasad; R. Shastri

Volume 9, Issue 4 , Autumn 2020, Pages 337-348

http://dx.doi.org/10.22105/riej.2020.259302.1156

Abstract
  Recommendation based systems can be used for recommending different web page, books, restaurants, tv shows, movies etc. The aim of movie recommendation system is to recommend movies to different users based on their interests. This helps the user to save time browsing the internet looking for movies ...  Read More

Research Paper Engineering Optimization
6. Formulation of a customer-oriented product and determination of optimum design parameters using response surface methodology

Sh. T. Alam

Volume 9, Issue 4 , Autumn 2020, Pages 349-363

http://dx.doi.org/10.22105/riej.2020.256074.1147

Abstract
  The development of a product demands numbers of consideration and customer-based product dominates the present market. This study aims to formulate a customer-oriented product and investigate the optimum design parameters level for this formulation. The customer-oriented product named 'CNC PCB Plotter' ...  Read More

Research Paper Inventory, logistics, and transportation
7. The impact of passenger's traffic on exchange rate and economic growth in Nigerian aviation industry

Ch. G. Udoka

Volume 9, Issue 4 , Autumn 2020, Pages 364-378

http://dx.doi.org/10.22105/riej.2020.257832.1149

Abstract
  The aim of this study is to examine the impact of passengers’ traffic on Exchange Rate (ER) and economic growth in Nigerian aviation industry. This study adopts an ex-post facto research design, a systematic empirical inquiry in order to carry out the research. Secondary data was obtained from ...  Read More