Chand's Simulations
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10-Gait Cycle Simulation

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ASME SBC 2009

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BCATS 2006

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Back Rotation from IK, REA, RRA
Sep 9, 2006
Author: Chand John

Movie: Failed REA-CMC Simulation
Sep 9, 2006
Author: Chand John
View is from the front of the model

Movie: Failed REA-CMC Simulation
Sep 9, 2006
Author: Chand John
View is from the right side of the model

Movie: Successful RRA-CMC Simulation
Sep 9, 2006
Author: Chand John
View is from the right side of the model

Movie: Successful RRA-CMC Simulation
Sep 9, 2006
Author: Chand John
View is from the front of the model

Pelvic Tilt from IK, REA, RRA
Sep 9, 2006
Author: Chand John

Residual Reduction Algorithm Diagram
Sep 9, 2006
Author: Chand John

Residuals After RRA
Sep 9, 2006
Author: Chand John

Residuals Before RRA
Sep 9, 2006
Author: Chand John

BCATS 2007

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10 gait cycle movie
Oct 10, 2007
Author: Chand John
A 3D muscle-actuated simulation of 10 gait cycles of free-speed walking

10 gait cycle movie (.mov)
Aug 8, 2008
Author: Chand John
A 3D muscle-actuated simulation of 10 gait cycles of free-speed walking

John (2012) Stabilization of walking paper

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Journal article (PDF)
Jan 1, 2012
Author: Chand John
Research article using my simulation of 10 gait cycles of walking to reveal that intrinsic muscle properties help stabilize walking

OpenSim Developers Workshop 2009

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Controller Example Movie
Oct 10, 2009
Author: Chand John
Movie of simulation resulting from controller example

Controller Exercise Slides
Oct 10, 2009
Author: Chand John
Slides for Chand's controller exercise in OpenSim Developers' Workshop 2009

OpenSim Testing

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OpenSim Workshops

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Residual Reduction Algorithm (RRA)

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1. BCATS 2007 poster on RRA (17.1 MB)
Jul 7, 2010
Author: Chand John
Enforcing dynamic consistency (Newton's second law) for motion capture data

2. ISOBME 2006 Taiwan abstract on RRA (182 KB)
Jul 7, 2010
Author: Chand John
Enforcing dynamic consistency (Newton's second law) for biomechanical simulation

3. RRA COM adjustment calculations by Chand John (104 KB)
Jul 7, 2010
Author: Chand John
The back-of-the-envelope calculations RRA uses to adjust the mass center of a model

4. RRA mass adjustment information by Eran Guendelman (31.5 KB)
Jul 7, 2010
Author: Chand John
How RRA adjusts the masses of segments of a model based on residuals

5. Additional notes on RRA (818 Bytes)
Jul 7, 2010
Author: Chand John
Notes on how to use RRA and limitations of the current implementation of RRA

Talks

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How to Do Research: Discussion
Apr 4, 2007
Author: Chand John
Discussion and slides on issues in PhD research

Physics-Based Simulation: Graphics and Robotics
Apr 4, 2006
Author: Chand John
Overview slides of some simulation techniques in graphics and robotics.

Residual Reduction presentation
Jan 1, 2006
Author: Chand John
Update on RRA and subject-specific simulation at NMBL meeting on Jan 20, 2006

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Last updated
Aug 27, 2014
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Chand John

SimTK is maintained through Grant R01GM124443 01A1 from the National Institutes of Health (NIH). It was initially developed as part of the Simbios project funded by the NIH as part of the NIH Roadmap for Medical Research, Grant U54 GM072970.

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