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'''Recurring Meeting of Cleveland Clinic - University of Utah'''

'''Date:''' June 25, 2014

'''Time:''' 3:00 PM EST

'''Means:''' Conference call

'''Attendees:'''

 1. Ahmet Erdemir (Cleveland Clinic)
 1. Jason Halloran (Cleveland Clinic)
 1. Jeff Weiss (University of Utah)
 1. Ben Ellis (University of Utah)
 1. Steve Maas (University of Utah)

'''Agenda:'''

 1. Recap on in situ strain test problem.
  http://wiki.simtk.org/openknee/Febio/InSituStrain
 1. Update on local coordinate systems and connector elements.
  http://wiki.simtk.org/openknee/Febio/RigidBodyMotions
 1. Update on set definitions in FEBio input and output.
  http://wiki.simtk.org/openknee/Febio/SetDefinitions
 1. Meeting at WCB 2014.
 1. Decide action items for next meeting.
 1. Other. 

'''Immediate Action Items:'''

 * Cleveland Clinic (Ahmet)
  * Schedule a meeting between Open Knee(s) collaborators at World Congress of Biomechanics 2014.
 * Cleveland Clinic (Ahmet & Jason)
  * Evaluate set feature using latest versions of FEBio and !PostView.
 * University of Utah (Steve)
  * Provide latest versions of FEBio and !PostView to the Cleveland Clinic team for testing of set feature.
  * Provide information to the Cleveland Clinic team on the implementation of pin joint.
 * University of Utah (Jeff & Steve)
  * Finalize work on in situ strain feature for potential publication.

'''Notes:'''

 1. Recap on in situ strain test problem.
  * In situ strain feature is now developed as a plug-in. This will also allow testing of the new plug-in framework introduced in FEBio 2.0. Steve is still trying to figure out the coupled formulation for prescription of in situ strains in a general manner. By our next meeting this should be wrapped up. In following, the cardiovascular test problem will be solved to include in a manuscript on the feature. Ahmet noted that it may be good to illustrate scenarios when pre-strain field is not compatible with the original imaged state of the tissue. This may provide guidance on how to prescribe experimental data, which may introduce measurement errors. Jeff and Steve will get together this week to discuss these in more detail.
 1. Update on local coordinate systems and connector elements.
  * Gerard has a continuing interest in relevant rigid body formulations. The framework was basically implemented and Gerard committed his code. Steve is in the process of integrating these changes. A new type of joint is defined, the pin joint. The University of Utah team will follow up to inform the Cleveland Clinic team on how constraint equations are implemented.
 1. Update on set definitions in FEBio input and output.
  * Steve completed the implementation of node and surface sets and domains (element sets) in the FEBio output (*.xplt) file. The output file specifications are available and will be provided to the Cleveland Clinic team. The Cleveland Clinic team can test the set feature using the latest FEBio and !PostView versions, which will be provided by the University of Utah team.
  * The group discussed the possibility to have a parser for the output file; or a library to access it. The xplt file is compressed, the Cleveland Clinic team can use Python to parse the uncompressed file based on specifications. Nonetheless, an official library/parser will facilitate scripting and minimize errors during third-party development of output file readers.
 1. Meetings at WCB 2014.
  * Jeff and Ben will be at WCB 2014. Ahmet will schedule a meeting with the University of Utah and Stanford University teams to have face-to-face discussion on the Open Knee(s).
 1. Decide action items for next meeting.
  * See Immediate Action Items above.
 1. Other. 
  * None.