In the 61st volume of "International Journal of Engineering Research in Africa" are included the peer-reviewed manuscripts reflecting the research results in the fields of structural metals and composite materials, technologies of materials processing and synthesis, biomass gasification technology and numerical analysis processes of natural convection in the porous medium. Readers will also be interested in investigations in radio electronics, wind energy and energy management, building materials and geotechnics. The presented scientific articles will be appreciated by many engineers and technologists from the industrial sector, as well as academics and students majoring in engineering science.

In this volume of journal "International Journal of Engineering Research in Africa" are collected articles which describe the results of engineering solutions of actual problems in mechanical engineering, materials processing technologies and chemical technologies, researching and designing of machines, in the designing of control systems for technological processes and engineering management of modern production. Published articles will be useful for professionals from field of mechanical engineering, chemical engineering, engineering management and for students and academic teachers of the related specialties.

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.

Automation and Control of Mechanical Systems and Technological Processes Special topic volume with invited peer reviewed papers only.

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.

We presents the 32st volume of the International Journal of Engineering Research in Africa which contains articles describing the results of engineering research and solutions in the fields of the applied mechanics, research of materials and processing technologies in the mechanical engineering, construction materials, equipment design, technological processes in the chemical production, environmental engineering and engineering management. The articles will be useful for the professionals concerned with mechanical engineering, materials science, chemical engineering, engineering management as well as for academic teachers and students majoring in these fields of engineering science.

In the current volume of journal "International Journal of Engineering Research in Africa" are collected papers by results of scientific and engineering researches from the many branches of applied sciences, starting from materials science and finishing to the logistics and management of the modern industrial manufacture. This collection will be useful and interesting for a wide range of engineers, researchers and students.