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Jonathan Arnowitz Jonathan, User Experience Architect for SAP Labs, is also the co-editor-in-chief of Interactions magazine. In addition to over 15 years experience designing and prototyping user experiences, Jonathan is also active in the HCI community and has served on the ACM/SIGCHI Executive Committee; the founder of the DUX Conference Series as well as co-chair of the Design track at CHI2008. Jonathan is co-author with Michael Arent of the book, Effective Prototyping.