Andy Ruina

Cornell University, Ithaca, NY, United States 
Applied Mechanics, General Biophysics, Mechanical Engineering
"Andy Ruina"
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Steven H. Collins research assistant 1999-2002 Cornell (Biomechanics Tree)
Manoj Srinivasan grad student Cornell (Biomechanics Tree)
Mario W. Gomes grad student 2005 Cornell
Samuel C. Walcott grad student 2006 Cornell
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Srinivasan M, Ruina A. (2008) Rocking and rolling: a can that appears to rock might actually roll. Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics. 78: 066609
Srinivasan M, Ruina A. (2007) Idealized walking and running gaits minimize work Proceedings of the Royal Society a: Mathematical, Physical and Engineering Sciences. 463: 2429-2446
Srinivasan M, Ruina A. (2006) Computer optimization of a minimal biped model discovers walking and running. Nature. 439: 72-5
Srinivasan M, Ruina A. (2006) Why are passive dynamic robotics efficient? Or at least not wildly inefficient? Journal of Biomechanics. 39
Bertram JEA, Ruina A, Srinivasan M. (2006) Collision costs in terrestrial gaits Journal of Biomechanics. 39
Ruina A, Srinivasan M. (2006) A particle collision model for calculating the energetic cost of the step-to-step transition in human walking Journal of Biomechanics. 39
Ruina A, Bertram JE, Srinivasan M. (2005) A collisional model of the energetic cost of support work qualitatively explains leg sequencing in walking and galloping, pseudo-elastic leg behavior in running and the walk-to-run transition. Journal of Theoretical Biology. 237: 170-92
Kuo AD, Donelan JM, Ruina A. (2005) Energetic consequences of walking like an inverted pendulum: step-to-step transitions. Exercise and Sport Sciences Reviews. 33: 88-97
Collins S, Ruina A, Tedrake R, et al. (2005) Efficient bipedal robots based on passive-dynamic walkers. Science (New York, N.Y.). 307: 1082-5
Chatterjee A, Pratap R, Reddy CK, et al. (2002) Persistent passive hopping and juggling is possible even with plastic collisions International Journal of Robotics Research. 21: 621-634
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