Author Description

This edition contains articles that were presented at an annual 9th International Conference on Advanced Engineering and Technology (ICAET 2023) held in Incheon, South Korea, on May 19-21, 2023. Published articles cover research results in materials science and materials processing and synthesis, designing and researching functional possibilities of machines, machine parts and equipment, and analysing and designing an optimisation production system based on Industry 4.0. We hope that this edition will be interesting and useful to many engineers, academics and also students.