Contact Information
I am a third year Ph.D. student at Rice University, where I also completed my B.S. in Electrical Engineering in 2008. My research focus is Mobile Systems, however I have a wide array of interests, both academic and recreational. I am in the Rice Efficient Computing Group, which is led by my advisor, Lin Zhong. While the primary focus of the group is low power computing, we explore a wide range of topics including human computer interaction, sensory computing, and cyber-physical systems. In the past I have worked on social television, advanced advertising across heterogeneous platforms, mobile screen stability, and extensive logging of mobile device usage. I am currently working on novel wireless networking techniques that leverage large-scale antenna systems for multi-user beamforming.
I am originally from Albuquerque, NM, where I attended the Albuquerque Academy. Up until college I was very active in various organized sports, and still enjoy playing them casually. In my spare time I enjoy socializing, particularly at Valhalla. As an associate at Jones College I remain active in the undergraduate Residential College system. You will not find much content on this site other than publications, but you can check out my technical blog or personal page.
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Clayton Shepard, Ahmad Rahmati, Chad Tossell, Lin Zhong, and Phillip Kortum, "LiveLab: measuring wireless networks and smartphone users in the field", in ACM SIGMETRICS Perform. Eval. Rev., vol. 38, no. 3, December 2010.
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Clayton Shepard, Ahmad Rahmati, Chad Tossel, Lin Zhong, and Phil Kortum, "LiveLab: measuring wireless networks and smartphone users in the field," in Proc. Workshop on Hot Topics in Measurement & Modeling of Computer Systems (HotMetrics), June 2010. (covered by Technology Review)
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Clayton Shepard*, Ahmad Rahmati*, and Lin Zhong, "NoShake: Content stablization for shaking screens of mobile devices," in Proc. IEEE Int. Conf. Pervasive Computing and Communication (PerCom), March 2009. (*equal contribution)
- Chad Tossell, Phil Kortum, Ahmad Rahmati, Clayton Shepard, and Lin Zhong, "Characterizing web use on smartphones," to appear in ACM SIGCHI Conf. Human Factors in Computing Systems (CHI), May 2012.
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Tossell, C.C., Kortum, P., Shepard, C.W., Rahmati, A., and Zhong, L. (In Press). Getting real: A naturalistic methodology for using smartphones to collect mediated communications. Advances in Human-Computer Interaction.
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Tossell, C.C., Kortum, P., Shepard, C.W., Barg-Walkow, L.H., Rahmati, A., and Zhong, L. (2012). A longitudinal study of emoticon use in text messaging from smartphones. Computers in Human Behavior, 28, 659-663.
- Ahmad Rahmati, Clayton Shepard, Chad Tossell, Mian Dong, Zhen Wang, Lin Zhong, and Philip Kortum, "Tales of 34 iPhone Users: How they change and why they are different," Technical Report TR-2011-0624, Rice University, June 2011. (arXiv)
- Chad Tossel, Phillip Kortum, Clayton Shepard, Ahmad Rahmati, and Lin Zhong, "Assessing the Performance of Common Tasks on Handeld Mobile Computers," in Proc. of Human Factors and Ergonomics Society (HFES), September 2010.
- Ahmad Rahmati, Clayton Shepard, Chad Tossell, Angela Nicoara, Lin Zhong, Phil Kortum, Jatinder Singh, "Seamless flow migration on smartphones without network support," Technical Report 2010-1214, Rice University, December 2010 (arXiv) (Early results presented at MobiCom'10 as poster)
- Li Erran Li, Thomas Marzetta, Clayton Shepard, Yang Richard Yang, Lin Zhong, "Lowering Complexity by Scaling Up: Design Practical, Efficient Cellular Networks with a Large Number of Antennas," Poster at MobiCom'11, September 2011.
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Ahmad Rahmati, Clayton Shepard, Angela Nicoara, Lin Zhong, Jatinder Pal Singh, "Mobile TCP usage characteristics and the feasibility of network migration without infrastructure support," Poster at MobiCom'10, September 2010.
- Ahmad Rahmati, Clayton Shepard, and Lin Zhong, "Demonstration: NoShake: Reducing Perceived Shake on Mobile Displays," in ACM/USENIX Int. Conf. Mobile Systems, Applications, and Services (MobiSys), June 2008.
- Ahmad Rahmati, Bryan Grandy, Charlie Ice, Sarah Joiner, Clayton Shepard, and Lin Zhong, "Demonstration: OrbitECG: mobile phone-based ambulatory wearable ECG monitoring," in ACM/USENIX Int. Conf. Mobile Systems, Applications, and Services (MobiSys), June 2007.