Air Pressure
  • "Finger Pad Topography beyond Fingerprints: Understanding the Heterogeneity Effect of Finger Topography for Human–Machine Interface Modeling" ,Changhyun Choi, Yuan Ma, Xinyi Li, Xuezhi Ma, and M. Cynthia Hipwell, ACS Applied Materials & Interfaces 

  • "Electrowetting: a consideration in electroadhesion", X. Li, C. Choi, Y. Ma, P. Boonpuek, J. R. Felts, J. Mullenbach, C. Shultz, J. E. Colgate, M. C. Hipwell, IEEE Transactions on Haptics

  • "Design and Optimization of a Finger-Surface Tribometer with Constant Normal Load Control", S .Chatterjee, M. Del Toro, X. Li, Y. Ma, M. C. Hipwell, STLE 2019 Tribology Frontiers Conference

  • "Study of Human Fingertip Friction with Controlled Relative Humidity", X. Li, C. Lai, S. Chatterjee, Y. Ma, M. C. Hipwell,  STLE 2019 Tribology Frontiers Conference

  • "Modeling Capillary Behavior in Finger-Device Interfaces", Y. Ma, M. C. Hipwell, STLE 2019 Tribology Frontiers Conference