@conference { , title = {The role of solar tracking systems in solar thermal energy applications}, conference = {Energy Systems Conference 2018}, organization = {London}, publicationstatus = {Unpublished}, url = {https://nottingham-repository.worktribe.com/output/1221028}, year = {2018}, author = {Hafez, A.Z. and Yousef, Ahmed M. and El-Metwally, Khaled and Ismail, Ibrahim} }