We are glad to present the 35th volume of International Journal of Engineering Research in Africa. This volume contains articles describing the research results in the fields of materials science in the mechanical engineering, construction materials, technological processes in the chemical production, power distribution and engineering management. The articles will be useful for many engineers as well as for academic teachers and students majoring in these fields of engineering science.

The 57th volume of "International Journal of Engineering Research in Africa" are included peer-reviewed manuscripts reflecting the research results in the fields of materials science, applied and fluid mechanics, power engineering and power management, ecology safety and agriculture, communication, road construction, building materials, and geotechnical engineering. The presented scientific articles can be appreciated by the majority of engineers, academic teachers, and students majoring in the fields of engineering science.

We present the 53rd volume of the "International Journal of Engineering Research in Africa" to our readers. This volume contains the articles reflecting the research results in the fields of structural alloys, applied mechanics and mechanical engineering, assessment of the potential efficiency of use the cleaner electricity generation, materials and technologies in construction, biofuel production and chemical treatment of the industrial wastewater, remote sensing, and industrial engineering. The articles will be useful for many engineers as well as for academic teachers and students majoring in the mentioned fields of engineering science.

In this volume of journal "International Journal of Engineering Research in Africa" are presented results of scientific research and engineering decisions for many areas of technical sciences such as materials and processing technologies in mechanical engineering, construction materials and environmental engineering, communication and information technology, logistics and industrial management. We hope that presented articles will be useful in practice of many researchers, engineers and students.

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.

This issue of the journal includes articles that described the last research results in materials science, mechanical engineering and machine design, heat transfer, treatment of the aqueous environment and solid waste aerobic degradation, power engineering, cloud computing, inventory management, crop production.

This periodical edition includes peer-reviewed papers based on results of scientific research and engineering solutions in different areas of modern engineering science.