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We are glad to provide our readers with the 43rd volume of International Journal of Engineering Research in Africa.
This volume contains articles describing the research results in the fields of materials science, mechanical engineering and control, communication and power supply in communication, construction materials and technologies, water treatment and biodiesel production, industrial engineering.
The articles will be useful for many engineers as well as for academic teachers and students majoring in these fields of engineering science.
Amorphous Polymer, Building Materials, Water Treatment, Kaolinite, Biodiesel, Cooking Oil, Screw Conveyor, Two-Wheeled Vehicle, Control, Digital Image Encryption Algorithm, Noise Attacks, 5G Networks, Base Station, Power Supply, Maintenance Activities, Optimization, Lean Manufacturing, Corporate Irresponsibility, Quality Management

The 39th volume of International Journal of Engineering Research in Africa contains articles describing the research results in the fields of materials science, mechanical engineering, power engineering, construction materials and technologies, technological processes in the chemical production, planning and scheduling of production system.
The articles will be useful for many engineers as well as for academic teachers and students majoring in these fields of engineering science.

The 37th volume of the Journal of Metastable and Nanocrystalline Materials contains articles that review the photoluminescence and super capacitive properties of carbon dots nanoparticles, bi-functional applications of some nanoparticles and nanocomposites.
This issue will be helpful to many specialists in applied materials science and nanotechnologies.

The current volume of the journal contains research papers on ceramics, metals, polymers and other engineering materials.
The scope of this volume is to present a wide range of papers on structural and functional materials, manufacturing processes, and technologies.
Presented research can be useful for scientists and researchers in the area of materials science and materials application.

Buildings Materials, Ceramics, Chemical Technologies, Coating, Composite, Fibre, Functional Materials, Hardfacing, Machining, Mechanical Properties, Metal, Polymer, Tribology, Wood

Descombes CFD model for turbocharger journal bearing performances.
The Numerical Simulation of Pure-Oil Lubrication Journal Bearing.
Advanced Materials Research, 143, 609-613(2011)
Journal of Fluids Engineering ASME. 124, 617—623(2002) [8] Gelan Yang, Xue Xu, Gang Yang and Jianming Zhang Semi-supervised Classification by Local CoordinationLecture Notes in Computer Science, 2010, Volume 6444, Neural Information Processing.
Models and Applications, Pages 517-524 [9] Gelan Yang, Xue Xu, Gang Yang and Jianming Zhang Research of Local Approximation in Semi-Supervised Manifold LearningJournal of Information & Computational Science, 2010 Vol. 7 (13) : 2681- 2688

The 41st volume of International Journal of Engineering Research in Africa contains articles describing the research results in the fields of materials science, mechanical engineering, control, wireless sensor networks, construction materials and technologies, technological processes and materials in the chemical production, freight transportation and structural analysis of production systems.
The articles will be useful for many engineers as well as for academic teachers and students majoring in these fields of engineering science.
Carbon Steel, Wire, Deep Drawing, Refractory Compound, Carbothermal Method, Motorized-Spindle System, Finite Element Model, Backstepping Controller, Multidimensional Hall Sensor, Wireless Underground Sensor Network, Concrete Bridge, Seismic Behavior, Reactive Powder Concrete (RPC), Construction Materials, Biogas, Anaerobic Digestion, Biodegradation, Biopolymer Blend, Freight Transportation, Structural Analysis, Production Systems

This volume of the journal presents readers with the collection of papers by results of the 4th International Conference on Global Sustainability and Chemical Engineering (ICGSCE 2018) which was successfully held during 5-6 September 2018 in Kuala Lumpur, Malaysia.
The topics mentioned in this collection cover a wide range of modern materials science and chemical engineering in the aspect of clean and sustainable development.

The 39th volume of the Journal of Metastable and Nanocrystalline Materials includes articles that review the zinc oxide crystal growth process with and without adding the graphene oxide, as well as analyse the microstructure and semiconductor properties of finished materials.
This issue will be helpful to specialists in materials science and applied nanotechnologies.

Key Engineering Materials, 748 KEM, 166–170. https://doi.org/10.4028/www.scientific.net/KEM.748.166 [10] John Wiley & Sons. (2013).
Pande, “Multiphase flow analysis of hydrodynamic journal bearing using CFD coupled Fluid Structure Interaction considering cavitation,” Journal of King Saud University - Engineering Sciences, vol. 30, no. 4, pp. 345–354, Oct. 2018, doi: 10.1016/j.jksues.2016.09.001
Mohd Sabri, “Experimental and Numerical Investigation of Static and Dynamic Characteristics of Bio-Oils and SAE40 in Fluid Film Journal Bearing,” Materials, vol. 15, no. 10, p. 3595, May 2022, doi: 10.3390/ma15103595
Lubrication Phospholipid Polymer Grafted Highly Cross-Linked UHMWPE 20.1.2 Articular Cartilage and Materials for Designing Artificial Joints
International Journal of Computational and Experimental Science and Engineering. 5. 31-36. 10.22399/ijcesen.492548.

So, the working temperature of lubricating oil at oil outlet is expressed as ρp s i c pG tt )1( + += (4) Finite Element Model of Hybrid Journal Bearing Material Properties of Bearing.
The material properties of the bearing (Fig.1) are shown in Table 1.
Table 1 Material properties of hybrid journal bearing Material Properties CuPb5Sn5Zn5 Steel 45 Density [kg/m 3] 8800 7850 Thermal conductivity [W/m·℃] 398 50.2 Specific heat [J/kg·℃] 343 460 Geometrical Model.
Acknowledgments This research was supported by the Science and Technology Foundation of Liaoning Province of China under granted No. 20072030 and the National Science and Technology Major Project of China under granted No. 2009ZX04014-014.
Gao: Advanced Materials Research Vols. 69-70 (2009) pp 296-30 [2] X.