Pitt | Swanson Engineering
Clark, William W
Mechanical Engineering & Materials Science
Clark, William W
Faculty
Professor
Office: BENDM 218G
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PhD in Mechanical Engineering, Virginia Polytechnic Institute and State University, 1991

MS in Mechanical Engineering, Virginia Polytechnic Institute and State University, 1988

BS in Mechanical Engineering, Virginia Polytechnic Institute and State University, 1986

(2013) University of Pittsburgh Innovator Award.

(2012) University of Pittsburgh Innovator Award.

(2011) University of Pittsburgh Innovator Award.

(2010) University of Pittsburgh Innovator Award.

(2009) University of Pittsburgh Innovator Award.

(2004) School of Engineering Faculty Honor Roll.

(2003) School of Engineering Faculty Honor Roll, University of Pittsburgh.

(2001) School of Engineering Faculty Honor Roll, University of Pittsburgh.

(2000) Hewlett International Travel Grant.

(1999) Bicentennial Board of Visitors Faculty Fellowship.

(1998) Beitle-Veltri Memorial Teaching Award.

(1997) ASEE Navy Summer Faculty Fellowship, NSWC Carderock Division.

(1997) Leighton E. and Mary N. Orr Faculty Fellowship, School of Engineering.

(1994) International Gas Turbine Institute Beginning Engineer Fellowship.

Kimber, M.A., Clark, W.W., and Schaefer, L.A., 2014, "Conceptual Analysis and Design of a Partitioned Multifunctional Smart Insulation," Journal of Applied Energy, pp. 310-319.

Mo, C., Davidson, J., and Clark, W.W., 2014, "Energy Harvesting with Piezoelectric Circular Membrane under Pressure Loading," Smart Materials and Structures.

Bond, D., Kimber, M.L., and Clark, W.W., 2013, "Configuring Wall Layers for Improved Insulation Performance," Journal of Applied Energy, pp. 235-245.

Meyer, T., Harris, R., Auletta, J., Motlagh, S.A., Weiland, L., Waldeck, D., and Clark, W.W., 2013, "Chemical and Electrochemical Manipulation of Mechanical Properties in Stimuli-Responsive Copper-Crosslinked Hydrogels"," ACS Macro Letters, no.12, pp. 1095-1099.

Mo, C., Arnold, D., Kinsel, W.C., and Clark, W.W., 2013, "Modeling and Experimental Validation of Unimorph Piezoelectric Cymbal Design in Energy Harvesting," Journal of Intelligent Material Systems and Structures, no.7, pp. 828-836.

Calvo-Marzal, P., Delaney, M.P., Auletta, J.T., Pan, T., Perri, N.M., Weiland, L.M., Clark, W.W., and Meyer, T.Y., 2012, "Manipulating Mechanical Properties with Electricity: Electroplastic Elastomer Hydrogels," ACS Macro Letters, no.1, pp. 204-08.

Mo, C., and Clark, W.W., 2012, "Bimorph Piezoelectric Cymbal Design in Energy Harvesting," ASME Conference on Smart Materials, Adaptive Structures, and Intelligent Systems, Georgia.

Mo, C., Jordan, S., and Clark, W.W., 2012, "Bimorph Piezoelectric Cymbal Design in Energy Harvesting," ASME 2012 Conference on Smart Materials Adaptive Structures and Intelligent Systems," ASME 2012 Conference on Smart Materials Adaptive Structures and Intelligent Systems, Stone Mountain, Georgia.

Mo, C., Wright, R.M., Knight, R.R., and Clark, W.W., 2012, "Finite element analysis of unimorph rectangular piezoelectric diaphragm actuators with experimental verification," Journal of Smart Materials and Structures, no.8, pp. 1-7.

Motlagh, A., and Clark, W.W., 2012, "Shape Characterization of a Simply Supported Beam in Morphing," ASME Conference on Smart Materials, Adaptive Structures, and Intelligent Systems, Georgia.

Motlagh, A., and Clark, W.W., 2012, "Shape Characterization of a Simply Supported Beam in Morphing," ASME Conference on Smart Materials, Adaptive Structures, and Intelligent Systems, Stone Mountain, Georgia.

Arnold, C.D., Kinsel, W., and Clark, W.W., 2011, "Unimorph PZT Cymbal Design in Energy Harvesting," ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Scottsdale, AZ.

Arnold, D., Kinsel, W., Clark, W.W., and Mo, C., 2011, "Exploration of New Cymbal Design in Energy Harvesting," San Diego, CA.

Knight, R.R., Mo, C., and Clark, W.W., 2011, "MEMS Interdigitated Electrode Pattern Optimization for a Unimorph Piezoelectric Beam," Journal of Electroceramics, no.1, pp. 14-22.

Knotts, W., Miller, D., Mo, C., Schaefer, L.A., and Clark, W.W., 2011, "Smart Insulation for Thermal Control in Buildings," ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Scottsdale, AZ.

Mo, C., Knight, R.R., Frederick, A.A., and Clark, W.W., 2011, "Fabrication and Energy Harvesting Measurements of Vibrating MEMS Piezoelectric Benders," ASME Transactions: Journal of Vibration and Acoustics, no.1, pp. 1-7.

Knight, R.R., Frederick, A.A., Mo, C., and Clark, W.W., 2010, "Tuning of sol-gel derived PZT MEMS resonators (125028)," Journal of Micromechanics and Microengineering, p. 10.

Mo, C., Radziemski, L.J., and Clark, W.W., 2010, "Analysis of piezoelectric circular diaphragm energy harvesters for use in a pressure fluctuating system," Smart Materials and Structures, no.2.

Mo, C., Radziemski, L.J., and Clark, W.W., 2010, "Experimental validation of energy harvesting performance for pressure-loaded piezoelectric circular diaphragms," Smart Materials and Structures, no.7.

Clark, W.W., and Mo, C., 2009, "Chapter 16 - Piezoelectric Energy Harvesting for Bio MEMS Applications," in Energy Harvesting Technologies, D.J. Inman, and S. Priya, eds., Springer, pp. 405-30.

Boyerinas, B., Clark, W.W., Weiland, L.M., and Joshi, S., 2009, "Design and Fabrication of a Variable Stiffness Link for use in an Unmanned Air Vehicle," ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems.

Mo, C., Kim, S., and Clark, W.W., 2009, "Theoretical Analysis of Energy Harvesting Performance for Unimorph Piezoelectric Benders with Interdigitated Electrodes," Smart Materials and Structures, no.5.

Mo, C., Knight, R., Frederick, A., and Clark, W.W., 2009, "Energy Harvesting by Vibrations with MEMS Piezoelectric Benders," San Diego, CA.

Mo, C., Radziemski, L.J., and Clark, W.W., 2008, "Performance comparison of implantable piezoelectric energy harvesters," San Diego, CA.

Gordon, B.O., and Clark, W.W., 2007, "Morphing structures by way of stiffness variations," Honolulu, Hawaii.

Hensel, P.J., Peter, J., Gemmen, R.S., Hetzer, B.J., Thornton, J.D., Vipperman, J.S., Clark, W.W., and Bucci, B.A., 2007, "Effects of Cell-to-Cell Fuel Mal-Distribution on Fuel Cell Performance," Journal of Power Sources, no.1, pp. 115-25.

Mo, C., Ban, G., Charnegie, D., and Clark, W.W., 2007, "Energy Harvesting from a Vibrating Piezoelectric Unimorph Bender," J. of KSIA, no.3, pp. 157-63.

Mo, C., Wright, R.M., and Clark, W.W., 2007, "The Effect of Electrode Pattern on the Behavior of Piezoelectric Actuators in a Circular Diaphragm Structure," Journal of Intelligent Material Systems and Structures, no.5, pp. 467-76.

Muriuki, M., and Clark, W.W., 2007, "Analysis of a novel technique for tuning a cantilever beam resonator using shunt switching," Journal of Smart Materials and Structures, pp. 1527-33.

Buric, M., Music, G., Clark, W.W., and Johnson, T., 2006, "Electric Energy Harvesting for Wireless Sensor Networks," 8th Annual Wireless and Microwave Technology Conference, Clearwater, FL.

Corr, L.R., and Clark, W.W., 2006, "Similarities Between Mechanical Springs and Piezoceramic Switching Shunts," AIAA Journal, no.11, pp. 2797-2800.

Mo, C., Wright, R.M., Slaughter, W.S., and Clark, W.W., 2006, "Behavior of a Unimorph Circular Piezoelectric Actuator," Journal of Smart Materials and Structures, pp. 1094-1102.

Frederick, A., and Clark, W.W., 2005, "Analysis of a Tunable Piezoelectric Resonator Using Interdigitated Electrodes," ASME International Mechanical Engineering Congress and Exposition, Orlando, FL.

Kim, S., Clark, W.W., and Wang, Q., 2005, "Piezoelectric Energy Harvesting Using a Bimorph Circular Plate: Experimental Study," Journal of Intelligent Material Systems and Structures, no.10, pp. 855-64.

Kim, S., Clark, W.W., and Wang, Q.M., 2005, "Piezoelectric Energy Harvesting Using a Bimorph Circular Plate: Analysis," Journal of Intelligent Material Systems and Structures, no.10, pp. 847-854.

Rodgers, J., Clark, W.W., and Vipperman, J.S., 2005, "Analysis and Testing of a Thunder Piezoelectric Actuator in an Air Flow Control Valve," 12th SPIE International Annual Symposium on Smart Structures and Materials, San Diego, CA.

Schoenly, J., and Clark, W.W., 2005, "Tuning the Switch Timing of Pulse-Switched Piezoelectric Shunts for Vibration Control," 12th SPIE International Annual Symposium on Smart Structures and Materials, San Diego, CA.

Wright, R., Mo, C., and Clark, W.W., 2005, "Effect of Electrode Pattern on the Performance of Unimorph Piezoelectric Diaphragm Actuators," San Diego, CA.

Li, Q., Lovell, M.R., Meier, J., and Clark, W.W., 2004, "A Study of Displacement Distribution in a Piezoelectric Heterogeneous Bimorph," ASME Journal of Design, pp. 757-64.

Campbell, B.H., Clark, W.W., and Wang, J.H., 2003, "A Multi-Station Culture Force Monitor System to Study Cellular Contractility," Journal of Biomechanics, no.1, pp. 137-40.

Corr, L.R., and Clark, W.W., 2003, "A Novel Semi-Active Multi-Modal Vibration Control Law for a Piezoceramic Spring," ASME Transactions: Journal of Vibration and Acoustics, pp. 1-9.

Kim, S., Clark, W.W., and Wang, Q., 2003, "Piezoelectric energy harvesting using a clamped circular plate: experimental study," ASME International Mechanical Engineering Congress and Exposition, Washington, DC.

Kurdilla, A.J., Clark, W.W., Wang, W., and McDaniel, D.E., 2003, "Stability of a Class of Real-Time Switched Piezoelectric Shunts," ," Journal of Intelligent Material Systems and Structures, no.2, pp. 107-16.

Muriuki, M., and Clark, W.W., 2003, "Modeling and Testing the Force-Generating Characteristics of Magnetorheological Dampers," International Journal of Vehicle Design, no.1-3, pp. 171-88.

Corr, L.R., and Clark, W.W., 2002, "Active and Passive Vibration Confinement using Piezoelectric Transducers and Dynamic Vibration Absorbers," Journal of Mechanical Behavior of Materials, no.2, pp. 117-33.

Corr, L.R., and Clark, W.W., 2002, "Comparison of Low Frequency Piezoceramic Switching Shunt Techniques for Structural Damping," Journal of Smart Materials and Structures, pp. 370-76.

Corr, L.R., and Clark, W.W., 2002, "Energy Dissipation Analysis of Piezoceramic Semi-active Vibration Control," Journal of Intelligent Material Systems and Structures, no.11, pp. 719-92.

Cain, J.T., Clark, W.W., Schaefer, L.A., Ulinski, D.J., Mickle, M.H., and Mandecki, W.M., 2001, "Energy Harvesting for DNA Gene Sifting and Sorting," International Journal of Parallel and Distributed Systems & Networks, no.3, pp. 140-49.

Clark, W.W., 2000, "Vibration Control with State-Switched Piezoelectric Materials," Journal of Intelligent Material Systems and Structures, no.4, pp. 263-71.

Shelley, F.J., and Clark, W.W., 2000, "Active Mode Localization in Distributed Parameter Systems with Consideration of Limited Actuator Placement: Part I, Theory," ASME Journal of Vibration and Acoustics, no.2, pp. 160-64.

Shelley, F.J., and Clark, W.W., 2000, "Active Mode Localization in Distributed Parameter Systems with Consideration of Limited Actuator Placement: Part II, Simulations and Experiments," ASME Journal of Vibration and Acoustics, no.2, pp. 143-50.

Shelley, F.J., and Clark, W.W., 2000, "Experimental Application of Feedback Control to Localize Vibration," ASME Journal of Vibration and Acoustics, no.2, pp. 165-68.

Corr, L.R., and Clark, W.W., 1999, "Comparison of Active and Hybrid Vibration Confinement with Conventional Active Vibration Control," Las Vegas, NV.

Clark, W.W., Kim, J.H., and Marangoni, R.D., 1998, "Using Residual Flexibility for Improved Observation of Reaction Forces in Flexible Structures," ASME Journal of Vibration and Acoustics, no.2, pp. 401-08.

Clark, W.W., and Robertshaw, H.H., 1997, "Force Feedback in Adaptive Trusses for Vibration Isolation in Flexible Structures," ASME Journal of Dynamic Systems, Measurement, and Control, no.3.

Clark, W.W., Kim, J.H., and Marangoni, R.D., 1997, "Active Control of Dynamic Bearing Loads in Rotating Machinery Using the Deflection Coefficient Method for Load Estimation," International Journal of Acoustics and Vibration, no.4, pp. 153-60.

Kim, J.H., Clark, W.W., and Marangoni, R.D., 1997, "Comparison of Reaction Force Suppression to Displacement Suppression for Vibration Control in a Flexible Structure," Journal of Sound and Vibration, no.2, pp. 225-42.

Clark, W.W., and Kim, S.H., 1996, "Comparison of Active and Semi-Active Vibration Controllers for a Dragline Boom," International Mechanical Engineering Congress and Exposition, E.W. Hendricks, R. Shoureshi, C.A. Tan, and H.S. Tzou, eds., Atlanta, GA.

Clark, W.W., Kim, J.H., and Shelley, F.J., 1996, "Hybrid Feedforward/Kalman Filter Controller for Reaction Force Suppression," International Mechanical Engineering Congress and Exposition, K. Danai, ed., Atlanta, GA.

Shelley, F.J., and Clark, W.W., 1996, "Eigenvector Scaling for Mode Localization in Vibrating Systems," AIAA Journal of Guidance, Control, and Dynamics, no.6, pp. 1342-48.

Coit, D., Billo, J., Leonard, D., Smith, A.E., Clark, W.W., and El-jaroudi, A., 1994, "Wave Soldering Process Control Modeling Using a Neural Network Approach," ASME Conference on Artificial Neural Networks in Engineering, St. Louis, MO.

Clark, W.W., Robertshaw, H.H., and Warrington, T.J., 1991, "A Comparison of Actuators for Vibration Control of the Planar Vibrations of a Flexible Cantilevered Beam," Journal of Intelligent Material Systems and Structures, no.3, pp. 289-308.

Clark, W.W., Kimiavi, B., and Robertshaw, H.H., 1989, "Control of Flexible Beams Using a Free Free Active Truss," ASME, B.K. Waka, ed., pp. 61-68.

Clark, W.W., Robertshaw, H.H., and Warrington, T.J., 1989, "A Planar Comparison of Actuators for Vibration Control of Flexible Structures," pp. 1495-1503.

Clark, W.W., "Semi-Active Vibration Control with Piezoelectric Materials as Variable Stiffness Actuators," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., "State-Switched Piezoelectric Systems for Vibration Control," St. Louis, MO.

Clark, W.W., and Hake, R., "An Example of Project-Based Learning Using a Laboratory Gantry Crane," Pittsburgh, PA.

Clark, W.W., and Ramsay, M.J., "Smart Material Transducers as Power Sources for MEMS Devices," International Symposium on Smart Structures and Microsystems, Hong Kong.

Clark, W.W., and Robertshaw, H.H., "Application of Adaptive Trusses to Vibration Isolation in Flexible Structures," pp. 2515-19.

Clark, W.W., and Shelley, F.J., "Experiments in Eigenstructure Assignment for Active Mode Localization in a Flexible Beam," Albuquerque, NM.

Clark, W.W., and Shelley, F.J., "Using Eigenvector Scaling to Isolate System Impulse Responses," St. Petersburg, Russia.

Clark, W.W., and Sobek, R.D., "Practical Implementation Issues and their Effects on Damping Performance of Pulse-Switched Piezoelectric Shunts for Vibration Control," Las Nevada, NV.

Clark, W.W., and Vipperman, J.S., "Semi-active vibration suppression of an impulsively-excited machine on a flexible foundation," SPIE 7th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., and Zhu, Z., "Experimental analysis of vibration confinement to enhance conventional active vibration control," SPIE 5th International Symposium on Smart Materials and Structures, San Diego, CA.

Clark, W.W., Boyerinas, B., Weiland, L.M., Cho, S.K., Bielawski, C., and Beckman, E.J., "On a path toward structures with reconfigurable circulatory systems (Paper No. 6526-51)," San Diego, CA.

Clark, W.W., Brigham, J.C., Mo, C., and Joshi, S., "Modeling of a high-deformation shape memory polymer locking link," San Diego, CA.

Clark, W.W., Falah, A.H., and Phule, P.P., "Modeling of magnetorheological fluid dampers with parallel plate analysis," SPIE 5th International Symposium on Smart Materials and Structures, San Diego, CA.

Clark, W.W., Kim, J.H., and Marangoni, R.D., "Active Control of Dynamic Bearing Loads in Rotating Machinery Using Non-Invasive Measurements (ASME Paper No. 94-GT-92)," The Hague, The Netherlands.

Clark, W.W., Kim, J.H., and Marangoni, R.D., "Comparison of Vibration Amplitude Suppression vs. Dynamic Bearing Load Suppression in Active Vibration Control of Rotating Machinery," pp. 2523-30, La Jolla, CA.

Clark, W.W., Kim, J.H., and Marangoni, R.D., "On the Number of Modes Required to Observe Forces in Flexible Structures," pp. 885-94, Boston, MA.

Clark, W.W., Romeiko, J.R., Charnegie, D.A., Kusic, G.L., and Mo, C., "A Case Study in Energy Harvesting for Powering a Wireless Measurement System," pp. 1765-1772, Stanford University.

Clark, W.W., Smith, R., Janes, K., Winkler, J., and Mulcahy, M., "Development of a piezoelectrically-actuated cell stretching device," SPIE 7th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., Sun, F., and Tarnowski, D., "On the Use of Vibration Confinement to Enhance Conventional Active Vibration Control," San Diego, CA.

Ayhan, F., Vipperman, J.S., Clark, W.W., Thornton, J., and Gemmen, R., "Fabrication and Preliminary Testing of a Novel Piezoelectrically Actuated Microvalve," ASME International Mechanical Engineering Congress and Exposition, Washington, DC.

Boyerinas, B., Mo, C., and Clark, W.W., "Behavior of Unimorph Rectangular Piezoelectric Diaphragm Actuators," SPIE 13th International Symposium on Smart Materials and Structures, San Diego, CA.

Bucci, B., Vipperman, J.S., Clark, W.W., Thornton, J., and Kim, S., "Piezoelectric Microvalve for Flow Control in Polymer Electrolyte Fuel Cells," 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL.

Charnegie, D., Mo, C., Frederick, A., and Clark, W.W., "Tunable Piezoelectric Cantilever Beams for Energy Harvesting," 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL.

Corr, L.R., and Clark, W.W., "Active Vibration Confinement by using Eigenstructure Placement and Piezoelectric Actuators," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Corr, L.R., and Clark, W.W., "Comparison of low frequency piezoceramic shunt techniques for structural damping," SPIE 8th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Corr, L.R., and Clark, W.W., "Energy Dissipation Analysis of Piezoceramic Semi-active Vibration Control," Structures, Structural Dynamics, and Materials Conference, Seattle, WA.

Corr, L.R., and Clark, W.W., "Piezoceramic Springs for Structural Semi-Active Multimodal Vibration Control," ASME 18th Biennial Conference on Mechanical Vibration and Noise, Pittsburgh, PA.

Corr, L.R., and Clark, W.W., "Vibration Confinement using Piezoelectric Transducers," St. Louis, MO.

Delaney, M.P., Weiland, L.M., Clark, W.W., Meyer, T., and Pan, T., "Experimental Characterization of Electroplastic Elastomers," Philadelphia, PA.

Dmuchoski, M., and Clark, W.W., "Design and Analysis of a Piezoelectric Mechanical Narrowband Filter," SPIE 10th International Symposium on Smart Materials and Structures, pp. 238-48, San Diego, CA.

Durmaz, O., Clark, W.W., Bennett, D.S., Paine, J.S., and Samuelson, M.N., "Experimental and Analytical Studies of a Novel Piezoelectric Coulomb Damper," SPIE 9th International Symposium on Smart Materials and Structures, San Diego, CA.

Falah, A.H., Clark, W.W., and Phule, P.P., "Modeling of magnetorheological fluid dampers using coaxial cylinder analysis," 1998 ASME International Mechanical Engineering Congress and Exposition, pp. 147-54, Anaheim, CA.

Frederick, A., Hu, H.H., and Clark, W.W., "Analysis of a Tunable Piezoelectric Resonator Using Interdigitated Electrodes," 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL.

Frederick, A.A., Hu, H.H., and Clark, W.W., "Frequency Tuning of Film Bulk Acoustic Resonators," 13th SPIE Annual International Smart Structures and Materials Conference, San Diego, CA.

Hensel, P.J., Gemmen, R.S., Hetzer, B.J., Thornton, J.D., Vipperman, J.S., Clark, W.W., and Ayhan, A.F., "Fuel Cell Performance Improvements Using Cell-to-Cell Flow Distribution Control," 2nd International Conference on Fuel Cell Science, Engineering, and Technology, Rochester, NY.

Hyder, C., and Clark, W.W., "Experimental Behavior of a Piezoelectric Flexure Linear Motor," G. Douglas, ed., pp. 1183-92.

Hyder, C., Horner, G.C., and Clark, W.W., "Linear Wave Traveling Motor," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Johnson, T.J., Charnegie, D., Clark, W.W., Buric, M., and Kusic, G., "Energy harvesting from mechanical vibrations using piezoelectric cantilever beams," SPIE 13th International Symposium on Smart Materials and Structures, San Diego, CA.

Kim, J.H., Clark, W.W., and Marangoni, R.D., "Feedback Techniques for Minimizing Bearing Loads in Rotating Machinery," R.A. Burdisso, ed., pp. 885-96, Blacksburg, VA.

Kim, S., Clark, W.W., and Johnson, T.J., "Harvesting energy from a cantilever piezoelectric beam," SPIE 11th International Symposium on Smart Materials and Structures, San Diego, CA.

Kim, S., Clark, W.W., and Qang, Q., "Piezoelectric Energy Harvesting Using a Diaphragm Structure," SPIE 10th International Symposium on Smart Materials and Structures, pp. 307-18, San Diego, CA.

Kim, S.H., and Clark, W.W., "Fuzzy Logic Semi-Active Vibration Control," 1999 International Mechanical Engineering Congress and Exposition, pp. 367-72, Nashville, TN.

Knight, R.R., Mo, C., and Clark, W.W., "Development and Testing of a MEMS Piezoelectric Energy Harvester," San Diego, CA.

Kroushl, D., Nesbit, A., Lee, J.K., Marangoni, R.D., Clark, W.W., Schwartz, D., and Phulé, P.P., "Experimental Performance of a Magnetorheological Fluid Damper," 16th Biennial Conference on Mechanical Vibration and Noise, Sacramento, CA.

Kurdilla, A.J., Clark, W.W., Zhang, X., and McDaniel, D.E., "Stability of a Class of State-Switched Piezoelectric Materials," 2000 International Mechanical Engineering Congress and Exposition, Orlando, FL.

Lee, J.K., and Clark, W.W., "A Study of Performance and Energy Consumption of Fully-On and Bi-State Vibration Control for an MR Damper," State College, PA.

Lee, J.K., and Clark, W.W., "Lyapunov Semi-Active Vibration Control with an MR Fluid Actuator," St. Louis, MO.

Lee, J.K., and Clark, W.W., "On the Performance vs. Energy Consumption Tradeoff with Semi-Active Vibration Control Using an MR-Fluid Damper," 1997 ASME International Mechanical Engineering Congress and Exposition, Dallas, TX.

Lee, J.K., and Clark, W.W., "Semi-Active control of flexural vibrations with an MR fluid actuator," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Mo, C., and Clark, W.W., "Harvesting Vibration Energy with a Piezoelectric Unimorph Bender," Korean Society of Automotive Engineers Fall Conference, Daegu, Korea.

Mo, C., Kim, S., and Clark, W.W., "Analysis of Power Generating Performance for Unimorph Cantiliever Piezoelectric Beams with Interdigitated Electrodes," 2005 International Design Engineering Technical Conferences, Long Beach, CA.

Mo, C., Radziemski, L.J., and Clark, W.W., "Analysis of PMN-PT and PZT circular diaphragm energy harvesters for use in implantable medical devices (Paper No. 6525-06)," SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring conference, San Diego, CA.

Mo, C., Radziemski, L.J., and Clark, W.W., "Energy Harvesting with Piezoelectric Unimorph Circular Diaphragms," ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SYMP 2-9, Ellicott City, MD.

Muriuki, M., Clark, W.W., and Phulé, P.P., "The Effects of Magnetic Field Alignment in Magnetorheological Fluid Actuators," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Muriuki, M.G., Clark, W.W., Wang, Q., and Chen, Q., "Design and Analysis of a Piezoelectric Cantilever Beam Resonator," SPIE 10th International Symposium on Smart Materials and Structures, pp. 36-47, San Diego, CA.

Patten, W.N., Robertshaw, H.H., Souh, B.Y., and Clark, W.W., "The Variational Formulation of a Suboptimal Feedback Control Algorithm With an Application to Beam Vibration Attenuation."

Ramsay, M.J., and Clark, W.W., "Piezoelectric Energy Harvesting for Bio MEMS Applications," SPIE 8th International Symposium on Smart Materials and Structures, G.L. Anderson, and A.R. McGowan, eds., Newport Beach, CA.

Robertshaw, H.H., Wynn, R.H., Kung, H.F., Hendricks, S.L., and Clark, W.W., "Dynamics and Control of A Spatial Active Truss Actuator," pp. 1473-79.

Shelley, F.J., and Clark, W.W., "Active Mode Localization in Distributed Parameter Systems with Consideration of Limited Actuator Placement," pp. 207-14, Boston, MA.

Shelley, F.J., and Clark, W.W., "Closed-Loop Mode Localization for Vibration Control in Flexible Structures," pp. 1826-30, Baltimore, MD.

Shelley, F.J., and Clark, W.W., "Experimental Verification of Closed-Loop Mode Localization," 1994 International Mechanical Engineering Congress and Exposition, K.W. Wang, ed., Chicago, IL.

Vipperman, J.S., Ayhan, A.F., Clark, W.W., Thornton, J., and Gemmen, R., "A Novel Piezoelectrically-Actuated Microvalve for Flow Control in Fuel Cells," International Mechanical Engineering Congress and Exposition, New Orleans, LA.

Warrington, T.J., Clark, W.W., and Robertshaw, H.H., "Comparison of Control Methods for Large-Angle Slewing of a Flexible Beam Using an Adaptive Truss."

Warrington, T.J., Clark, W.W., and Robertshaw, H.H., "The Analysis and Control of Large Angle Slewing of a Flexible Beam Using an Adaptive Truss."

Wood, C.T., Horner, G.C., and Clark, W.W., "Design and Analysis of an Active Flexure Actuator," SPIE 6th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., 2010, "Modeling of a high-deformation shape memory polymer locking link," SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring Conference, San Diego, CA.

Clark, W.W., 2009, "Development of a piezoelectrically-actuated cell stretching device," SPIE 7th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., 2009, "Energy Harvesting by Vibrations with MEMS Piezoelectric Benders," ASME International Design Engineering Technical Conferences, San Diego, CA.

Clark, W.W., 2008, "Performance comparison of implantable piezoelectric energy harvesters," SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring Conference, San Diego, CA.

Clark, W.W., 2007, "A Case Study in Energy Harvesting for Powering a Wireless Measurement System," International Workshop on Structural Health Monitoring, Stanford University.

Clark, W.W., 2007, "Analysis of PMN-PT and PZT circular diaphragm energy harvesters for use in implantable medical devices," SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring conference, San Diego, CA.

Clark, W.W., 2007, "Morphing structures by way of stiffness variations," 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI.

Clark, W.W., 2007, "On a path toward structures with reconfigurable circulatory systems," SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring Conference, San Diego, CA.

Clark, W.W., 2007, "Past, Present, and Potential of Energy Harvesting with Piezoelectric Materials," University of Toledo.

Clark, W.W., 2007, "Practical Implementation Issues and their Effects on Damping Performance of Pulse-Switched Piezoelectric Shunts for Vibration Control," ASME 2007 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, IDETC/CIE 2007, Las Vegas, NV.

Clark, W.W., 2006, "Analysis of a Tunable Piezoelectric Resonator Using Interdigitated Electrodes," 2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL.

Clark, W.W., 2006, "Behavior of Unimorph Rectangular Piezoelectric Diaphragm Actuators," SPIE 13th International Symposium on Smart Materials and Structures, San Diego, CA.

Clark, W.W., 2006, "Energy Harvesting from mechanical vibrations using piezoelectric cantilever beams," 13th SPIE International Smart Structures and Materials Conference, San Diego, CA.

Clark, W.W., 2006, "Energy harvesting from mechanical vibrations using piezoelectric cantilever beams," SPIE 13th International Symposium on Smart Materials and Structures, San Diego, CA.

Clark, W.W., 2005, "Analysis of Power Generating performance for unimorph cantilever piezoelectric beams with interdigitated electrodes," 2005 International Design Engineering Technical Conferences, Long Beach, CA.

Clark, W.W., 2005, "Analysis of Power Generating Performance for Unimorph Cantilever Piezoelectric Beams with Interdigitated Electrodes," 2005 International Design Engineering Technical Conferences, Long Beach, CA.

Clark, W.W., 2005, "Morphing Materials: Enabling a New Class of Smart Structures," DARPA Symbiotic Materials and Structural Systems Workshop, Alexandria, VA.

Clark, W.W., 2005, "Mutable Materials - Enabling a New Class of Smart Structures," Air Force Research Lab, Wright Patterson Air Force Base.

Clark, W.W., 2005, "Mutable Materials - enabling a new class of smart structures," DARPA Material Systems for Autonomous Structural Tailoring (MAST) workshop, Alexandra, VA.

Clark, W.W., 2005, "Muterials: A new approach to smart materials and structures," DARPA Morphing Aircraft Meeting.

Clark, W.W., 2005, "Muterials: A New Approach to Smart Materials and Structures," the DARPA Morphing Material and Structural Systems Workshop, Alexandria, VA.

Clark, W.W., 2005, "Tuning the Switch Timing of Pulse-Switched Piezoelectric Shunts for Vibration Control," 12th SPIE International Annual Symposium on Smart Structures and Materials, San Diego, CA.

Clark, W.W., 2004, "Real Time Switching of Piezoelectric Shunts for Vibration Control and Other Neat Tricks," Penn State University.

Clark, W.W., 2003, "Design and Analysis of a Piezoelectric Mechanical Narrowband Filter," SPIE 10th International Symposium on Smart Materials and Structures, San Diego, CA.

Clark, W.W., 2003, "Piezoelectric energy harvesting using a clamped circular plate: experimental study," ASME International Mechanical Engineering Congress and Exposition, Washington, DC.

Clark, W.W., 2001, "Piezoceramic Springs for Structural Semi-Active Multimodal Vibration Control," ASME 18th Biennial Conference on Mechanical Vibration and Noise, Pittsburgh, PA.

Clark, W.W., 2001, "Real-Time Switching of Piezoelectric Shunts for Structural Vibration Control," 141st Meeting of the Acoustical Society of America, Ft. Lauderdale, FL.

Clark, W.W., 2000, "A Piezoelectrically-Actuated Cell Stretching Device," American Society of Biomechanics, Chicago, IL.

Clark, W.W., 2000, "Development of a piezoelectrically-actuated cell stretching device," SPIE 7th International Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., 2000, "Real-Time Switching of Piezoelectric Shunts for Structural Control," School of Mechanical and Production Engineering, Nanyang Technological University, Singapore.

Clark, W.W., 2000, "Semi-Active Vibration Suppression of an Impulsively-Excited Machine on a Flexible Foundation," SPIE 7th Internaitonal Symposium on Smart Materials and Structures, Newport Beach, CA.

Clark, W.W., 2000, "Smart Material Transducers as Power Sources for MEMS Devices," International Symposium on Smart Structures and Microsystems, Hong Kong.

Clark, W.W., 2000, "Smart Structures - Advanced Development Demonstration for Army Weapon Systems," DARPA Technology Interchange Meeting #7, Baltimore, MD.

Clark, W.W., 2000, "Stability of a class of state-switched piezoelectric materials," 2000 International Mechanical Engineering Congress and Exposition, Orlando, FL.

Clark, W.W., 1999, "Control Design Issues for Variable Damping and Variable Stiffness Systems," 7th International Conference on ER Fluids and MR Suspensions, Honolulu, HI.

Clark, W.W., 1999, "Experimental behavior of a piezoelectric flexure linear motor," International Symposium on Active Control of Sound and Vibration, Ft. Lauderdale, FL.

Clark, W.W., 1999, "Smart Structures - Advanced Development Demonstration for Army Weapon Systems," DARPA Technology Interchange Meeting #6, Baltimore, MD.

Clark, W.W., 1998, "Experimental Analysis of Vibration Confinement to Enhance Conventional Active Vibration Control," DARPA Technology Interchange Meeting #5.

Clark, W.W., 1997, "Experiments in Vibration Confinement for Enhancing Conventional Active Vibration Control," DARPA Technology Interchange Meeting #4.

Clark, W.W., 1997, "State-Switched Actuators for Adaptive-Passive Vibration Control," Naval Surface Warfare Center, Carderock Division, Bethesda, MD.

Clark, W.W., 1996, "Active Vibration Control by Confinement," Naval Undersea Warfare Center, Newport, RI.

Clark, W.W., 1996, "Eigenvector Shaping: An Alternative Approach to Vibration Control," Mechanical Engineering Department, SUNY Buffalo.

Clark, W.W., 1996, "Eigenvector Shaping: An Alternative Approach to Vibration Control," Mechanical Engineering Department, Vanderbilt University.

Clark, W.W., and Allaei, D., 1996, "Localized Vibration and Smart Materials for Controlling the Dynamic Response of Structures," DARPA Technology Interchange Meeting #3.

Clark, W.W., 1994, "Autonomous Maintenance for Integrated Diagnostics in Machinery," Naval Surface Warfare Center, Carderock, MD.

Clark, W.W., 1989, "A Planar Comparison of Actuators for Vibration Control of Flexible Structures," The Sixth Annual Ohio State University Control Workshop.

Vipperman, J.S., Clark, W.W., and Slaughter, W.S., 1999, "Embedded Sensors in .50 Caliber M2 Composite Machine Gun Barrel," DARPA Review: Smart Structures - Advanced Development Demonstration for Army Weapon Systems, University of Pittsburgh, Pittsburgh PA.

Clark, W.W., and Romeiko, J., 2013, "Inertial Measurement of Sports Motion."

Clark, W.W., Bychkova, V., Cho, S., Flaherty, R., Flaherty, J., McConnell, A., Star, A., Syciarz, T., Wagner, D., and Zhao, Y., 2013, "Measurement Device with Automatic Calibration."

Weiland, L.M., Cole, D., and Clark, W.W., 2012, "Adaptive Hydroelectric Energy Harvesting," 13/622855.

Meyer, T.Y., Waldeck, D.H., Weiland, L.M., Calvo-Marzal, P., Pan, T., and Clark, W.W., 2012, "Redox Stimulated Variable-Modulus Material," 13/710114.

Zhao, Y., Syciarz, T., Cho, S., and Clark, W.W., 2012, "Measurement Device with Sensor Array."

Clark, W.W., Zhao, Y., Cho, S., Syciarz, T., Flaherty, R., and Flaherty, J., 2012, "Measurement Device with Reader and Disposable Probe."

Clark, W.W., Mo, C., Knotts, W., and Schaefer, L.A., 2012, "Smart Insulation."

Cho, S., and Clark, W.W., 2010, "Microscale pH sensor," 61/093,680.

Cho, S., Zenati, M., Clark, W.W., Sclabassi, R.J., Sun, M., and Hu, H., 2008, "Implantable device, system including same, method utilizing same," 12/203, 041.

Vipperman, J.S., Gemmen, R., Thornton, J., and Clark, W.W., 2007, "Piezoelectric Axial Flow Microvalve," United States Patent Number 7,159,841.

Wang, Q., and Clark, W.W., "Tunable piezoelectric micro-mechanical resonator," United States Patent 6,943,484.

Vipperman, J.S., Hensel, J.P., Black, N., Thornton, J.D., Lambeth, D.N., and Clark, W.W., "Active Combustion Flow Modulation Valve," 8,540,209.