Book excerpt: We present to our readers the 38th volume of the International Journal of Engineering Research in Africa which contains scientific articles describing the results of engineering research and solutions in the fields of materials and processing technologies in the mechanical engineering, construction and chemical technologies, ergonomics, 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.