Studies in Engineering and Technology (SET) would like to acknowledge the following reviewers for their assistance with peer review of manuscripts for this issue. Many authors, regardless of whether SET publishes their work, appreciate the helpful feedback provided by the reviewers. Their comments and suggestions were of great help to the authors in improving the quality of their papers. Each of the reviewers listed below returned at least one review for this issue.Reviewers for Volume 4, Number 1António Calha, Polytechnic Institute of Portalegre, PortugalCarmen Pérez-Sabater, Universitat Poltècnica de València, SpainCélio Gonçalo Marques, Polytechnic Institute of Tomar, PortugalDeborah Christine Robinson, University of Derby, UKElena Jerves, University of Cuenca, EcuadorEnisa Mede, Bahcesehir University, TurkeyEsra DERELİ-Eskişehir Osmangazi University, TurkeyEsra DERELİ-Eskişehir Osmangazi University, TurkeyIntakhab Khan, King Abdulaziz University, Saudi ArabiaJohn Cowan, Edinburgh Napier University, UKLisa Marie Portugal, Grand Canyon University, USALorna T. Enerva, Polytechnic University of the Philippines, PhilippinesM. Emin Türkoğlu, Afyon Kocatepe University, TurkeyMarcie Zaharee, The MITRE Corporation, USAMeral Seker, Alanya Alaaddin Keykubat University, TurkeyMustafa Çakır, Marmara Üniversity, TurkeyNerina Fernanda Sarthou, Univ. Nacional del Centro de la Provincia de Buenos Aires, ArgentinaNicole Celestine, The University of Western Australia, AustraliaNiveen M. Zayed, MENA College of Management, JordanPirkko Siklander, University of Lapland, FinlandRichard Penny, University of Washington Bothell, USARui Manuel Carreteiro, National Institute of Psychology and Neurosciences, PortugalSamad Mirza Suzani, Islamic Azad University, IranYalçın Dilekli, Aksaray University, Turkey Andrew WalterEditorial AssistantStudies in Engineering and Technology-------------------------------------------Redfame Publishing9450 SW Gemini Dr. #99416Beaverton, OR 97008, USATel: 1-503-828-0536 ext. 504Fax: 1-503-828-0537E-mail: set@redfame.comURL: http://set.redfame.com