***** To join INSNA, visit http://www.insna.org ***** Dear All, I hope this Email finds you well. I'm Mehrdad, I have a question regarding my dissertation that I would be appreciate if you could help me and give me your comments. In my dissertation,I want to work on diffusion on social networks. In details, I want to develop an optimization mathematical programming model to maximize the diffusion of text message through selecting the best first contact nodes. My data are gathered from a real social network in a uni-sex university in Iran. The network are based on a mobile phone contact list data. In this data I have 162 nodes (students) and more than 3000 links. I have read some papers in this field as Kempe's one, Kimura's one, Chen's one or Lescovec's. I understand that in all works that have been done, there is not any mathematical modeling for optimizing this problem and they have proposed an approximation algorithm for optimizing the problem. Is it a novel contribution to develop a mathematical programming considering one of the the influence model such as independent Cascade that is fit to the real situation in sending text messages? I have a question, why did not any other scholars use the mathematical programming? Is it very complex? Or it has not any value? I am confused with my work, please guide me. I am looking forward to hearing from you. Thanks in advance for your time and help. ------------------ Best Regards Mehrdad Kermani PhD Candidate of Industrial Engineering Iran University of Science and Technology _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.