Çolak, İlhami2020-04-162020-04-1620152149-01042149-5262https://hdl.handle.net/11363/2059Dear Colleagues, On behalf of the editorial board of International Journal of Engineering Technologies (IJET), I would like to share our happiness to publish the fourth issue of IJET. My special thanks are for members of editorial board, editorial team, referees, authors and other technical staff. Please find the fourth issue of International Journal of Engineering Technologies at http://dergipark.ulakbim.gov.tr/ijet. We invite you to review the Table of Contents by visiting our web site and review articles and items of interest. IJET will continue to publish high level scientific research papers in the field of Engineering Technologies as an international peerreviewed scientific and academic journal of Istanbul Gelisim University. Thanks for your continuing interest in our work, Professor ILHAMI COLAK Istanbul Gelisim University icolak@gelisim.edu.tr http://dergipark.ulakbim.gov.tr/ijet Printed ISSN: 2149-0104 e-ISSN: 2149-5262eninfo:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivs 3.0 United StatesIstanbul Gelisim UniversityInternational Journal of Engineering TechnologiesAcademic Refereed JournalsOther14