This Course Material will not be accomplished, if it lacks of many beautiful and high quality illustrations and images from around the world, donated from dozens photographers by uploading them to public Web sites and grant some or all copyright permissions to their creative works; under Creative Commons copyright licenses (CC),. This allows the images and data to be used within the boundaries of copyright laws and by reference to the original owners of the copyright. There were two main web sites used for the case study sources here. They were “http://commons.wikimedia.org” and “http://www.flickr.com”. For this reason, I would like to thank to the owners’ photos whose names are next to their images.
