The 69th volume of the journal includes articles dedicated to the latest research results in properties and processing technologies of structural materials such as steel, polymers, and composites, analysis and design of sliding mode controllers and automation of centrifugal pumps, designing of geothermal heat exchangers, investigation of seismic behaviour of soil-based structure and analysis mechanics of river's sediments transfer in conditions of Wadi Skhirate, Morocco. The issue will be useful to specialists in mechanical engineering and construction.

We present for our readers the 33rd 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 and technologies, equipment design, power electronics, power distribution, 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, power production and engineering management as well as for academic teachers and students majoring in these fields of engineering science.

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

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 handbook examines agricultural and rural development in Africa from theoretical, empirical and policy stand points. It discusses the challenges of the United Nations Sustainable Development Goals (SDGs) and assesses how poverty and other development concerns can be addressed in rural communities through agricultural transformation. Additionally, the handbook extends the Post-2015 Development Agenda and it emphasizes the importance of the agricultural sector as it is closely related to the issues of food sustainability, poverty reduction, and employment creation. The contributors suggest multiple evidence-based policies to develop the rural areas through the transformation of the agricultural sector which can significantly benefit the African continent.