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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.

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

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 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

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 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 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.

The 72nd volume of the journal is dedicated to actual issues and engineering decisions in corrosion protection, research and design in mechanical engineering, power electronics, investigations of green building materials properties, geological research and comparison of two modelling methodologies in flood risk assessment.
The presented research results and engineering solutions will be useful to a wide range of specialists in the mentioned fields of engineering science.
Flood Risk Assessment, Magnet Motor, Aluminide Coating, Corrosion Protection, Inertial Conveyor, Converter, Solar Radiation Flux, Green Building Materials, Geopolymer, Reinforced Concrete Frame Building, Seismic Performance, Morphometric Analysis, Lithology, Geology

Compared with piezoelectric materials, giant magnetostrictive materials (GMM) have higher energy density and larger strain [10, 11].
They successfully built a prototype of an active controlled journal bearing using GMM actuators (named a smart GMA journal bearing) and tested with low speeds.
The major parameters of the journal bearing are listed in Table 1.
Chung: Actuator - Application of Giant Magnetostrictive Material, B.Sc.
Rajeshwari and V.Rajendran: Defense Science Journal, 55(1) (2005), p.13