Hongshen Ma

"Permittivity Measurements using Adjustable Microscale Electrode Gaps between mm-Sized Spherical Electrodes", H. Ma, J.H. Lang, and A.H. Slocum, Review of Scientific Instruments, Vol. 79, No. 3, 2008. (In press)

“Design of an Electrochemical Impedance Test Cell with Servomechanically Adjustable Cell Constant”, H. Ma, J.H. Lang, and A.H. Slocum, IEEE Sensors Conference, Atlanta, GA, October 2007.

“Design of an Injection-molded Impedance Cell for Measuring the Dielectric Constant and Conductivity of Liquids and Gases Across Adjustable Nanometer Electrode Gaps”, H. Ma and A.H. Slocum, in Proceedings of the American Society for Precision Engineering Annual Meeting, Dallas, TX, October 2007.

“Technique for Measuring the Dielectric Constant of Liquids and Gases without the Use of Calibration Standards”, H. Ma, J.H. Lang, and A.H. Slocum, MicroTAS Conference, Paris, France, October 2007.

“Design of a Flexural Mechanism for Varying the Separation between Spherical Electrodes with Nanometer Accuracy”, H. Ma and A.H. Slocum, in Proceedings of the European Society for Precision Engineering and Nanotechnology, Bremen, Germany, May 2007.

“A Flexible-Input, Desired-Output (FIDO) Motor Controller for Engineering Design Classes,” H. Ma, A.H. Slocum. IEEE Transactions on Education, Vol. 49, No. 1, Feb. 2006.

“An Instrument to Control Parallel Plate Separation for Nanoscale Flow Control,” J. White, H. Ma, J. Lang, A.H. Slocum. Review of Scientific Instruments, Vol. 74, No. 11, November 2003.

“A Mechanism for Creating Variable Nanometer Gaps,” H. Ma and A.H. Slocum, in Proceedings of the American Society for Precision Engineering Annual Meeting, Monterey, CA, 2006.

“Sub-nanometer Displacement Sensing for the Nanogate,” H. Ma, J. White, J.A. Paradiso, and A.H. Slocum, in Proceedings of the 2003 IEEE International Conference on Sensors, October 21-24, Toronto, Ontario, pp. 1086-1091.

“The FindIT Flashlight: Responsive Tagging Based on Optically Triggered Microprocessor Wakeup,” H. Ma, J.A. Paradiso, in G. Borriello and L.E. Holmquist (Eds.): UbiComp 2002, LNCS 2498, Springer-Verlag Berlin Heidelberg, 2002, pp. 160-167.

“ORCA-V: An Autonomous Underwater Vehicle,” MIT ORCA team, Journal paper for the 2002 AUVSI and ONR Autonomous Underwater Vehicle Competition, San Diego, CA 2002.

“What the Heck are Photonic Crystals?” H. Ma. Canadian Undergraduate Physics Conference, Nov. 8-11, 2000. This talk won the prize for the best overall presentation.

And here's a list of patents:

“Method for Measuring Dielectric Properties of Materials in a Small Electrode Gap,” H. Ma and A.H. Slocum, Assignee: MIT, Filing date: 10/9/2006, pending

“Input Device Based on Frustrated Total Internal Reflection,” H. Ma and J. Paradiso, Assignee: MIT, Filing date: 12/16/2004, pending

“Variable Electronic Circuit Component,” A.H. Slocum, J. Lang, J.R. White, H. Ma, and X. Yang, US 6914785, Assignee: MIT, filing date: 10/10/2003, Granted 7/5/2005.

“Tag Interrogation with Observable Response Signal,” J.A. Paradiso, H. Ma, and A. Lippman , US 7109865, Assignee: MIT, Filing Date: 9/26/2002, Granted 9/6/2006.