Th e objective of Eurasian Journal of Science Engineering and Technology (EJSET) is to provide an academic environment for researchers in various fields of science and engineering and for the publication and dissemination of high-quality research results in the fields of science, applied science, engineering, architecture, agricultural science and technology. It is our pleasure to introduce the fourth issue now with Digital Object Identifier (DOI) of EJSET. This issue covers topics ranging from natural sciences to engineering. In the third year of our journal, we would like to thank our friends, engineers, scientists, academicians, and technicians who showed interest in the subject, all the teams and referees as well as editorial board who supported the publication process. We would like to remind you that our journal’s next issue will be published in mid December 2022 and you are welcome to submit your original research in the meantime. We hope to meet you in our next issues.