Hi, I have a degree on Mechanical Engineering from UNAM and I am presently studying a master on desing at UNAM. I wrote my thesis on "The Application of TRIZ to the desing of a gareiatric wheelchair". Righ now I want to develop a more thoroungh study on the su-field analysis, phisical contradictions and on the evolution radar. I am writing a paper for the congress ITEMI 2010 in Orlando USA where I will speak about the application of TRIZ on my desing of a geriatric wheeelchair. I still have many doubts about the use of TRIZ so I would appreciate your answering my questions if possible.