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this is good article.
http://vitamintalent.com/vitabites/the-secrets-of-ux-and-ui-roles-explained#
"Design and user interface"
Is a short and simple is to make it easier for the user during use, it's that allow him to end the easy way without complications, that is, they contribute mainly to improving the relationship between the user and the machine and for that we use GPU mechanisms known (the quality of design and quality of lines ...)
"user experience design"
they must all designed to expect and know what is expected to the user and what are the desires and needs, and what are the things that do not like in order to avoid them and use interface linked mainly technical matters recognized by (for example, say you do not have to put yellow writing on a white background) while the user experience completely linked to the user the same desires and needs, what he loves and what he hates.
