- Opensim-announcement - SimTK Mailing Lists

Announcing OpenSim 4.1 with Support for IMU Data
by Jennifer Hicks 10 Feb '20

10 Feb '20

We are pleased to announce OpenSim 4.1 <https://simtk.org/frs/?group_id=91>. The new software enables users to read in inertial measurement unit (IMU) data and compute inverse kinematics based on IMU orientations. This workflow is called OpenSense. This is an exciting initial step towards supporting biomechanical analyses with IMUs in OpenSim. For this release, the user is primarily responsible for ensuring proper calibration and registration of the sensors to an appropriate OpenSim model. In the future, we will add more advanced algorithms for calibration, registration, and drift correction. You can read more about these new capabilities and try an example: OpenSense - Kinematics with IMU Data <https://simtk-confluence.stanford.edu/display/OpenSim/OpenSense+-+Kinematic…> . We have also fixed several bugs and improved the user experience. Read more and learn how to upgrade <https://simtk-confluence.stanford.edu/pages/viewpage.action?pageId=36439186> . Download OpenSim 4.1 <https://simtk.org/frs/?group_id=91>. -- *Jennifer Hicks, Ph.D.* Director of Data Science | Mobilize Center <http://mobilize.stanford.edu> Associate Director | NCSRR <http://www.stanford.edu/group/opensim/about/index.html> R&D Manager | OpenSim <http://opensim.stanford.edu/> Stanford University 650-498-4403 | jenhicks(a)stanford.edu

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Webinar: Computational Models to Test Hypotheses in Motor Control + Guinea Fowl Model Now Available
by Joy P. Ku 30 Jan '20

30 Jan '20

Webinar: Computational Models of Reaching to Test Hypotheses in Motor Control February 11, 2020 at 10:00 a.m. Pacific Standard Time We invite you to join us for a webinar featuring Mazen Al Borno from Stanford University. In this webinar, Dr. Al Borno will highlight his computational experiments to elicit a new understanding of 1) the relationship between movement speed and accuracy, known as the speed-accuracy tradeoff, and 2) the feasibility of muscle synergies, represented by a low-dimensional controller, to produce the rich and flexible behaviors seen in everyday movements. Learn more and register<https://stanford.webex.com/stanford/onstage/g.php?MTID=ec424d87e4a7fafee5b0…> Model of the Guinea Fowl Pelvic Limb Available on SimTK Past OpenSim Visiting Scholar Suzanne Cox from Pennsylvania State University and colleagues have developed a guinea fowl (Numida meliagris) pelvic limb model and made it freely available on SimTK for others to use. Dr. Cox, et al. utilized the model to explore how activation and tendon compliance interact to influence muscle operating lengths and force-generating capacity. Read more about their study and the model in the Integrative Organismal Biology publication<https://academic.oup.com/iob/article/1/1/obz022/5568294>. Download the model<http://simtk.org/projects/guineafowl> --- Joy P. Ku, PhD Project Manager, SimTK<http://simtk.org/> Director of Communications & Training, NCSRR<http://opensim.stanford.edu/> Director of Communications & Engagement, Mobilize Center<http://mobilize.stanford.edu/> Stanford University (w) 650.736.8434 Email: joyku(a)stanford.edu<mailto:joyku@stanford.edu>

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Workshop Deadline Approaching, Fellows Program, Moco Office Hours
by Jennifer Hicks 08 Jan '20

08 Jan '20

*Reminder: Apply to the Next OpenSim Advanced User Workshop at Stanford University* *Applications Due: January 14, 2020Workshop Dates: March 24-26, 2020* We are now accepting applications for a three-day, project-based workshop on the Stanford University campus. This workshop is intended for advanced OpenSim users and developers who want to work with the OpenSim staff on specific research projects. We highly encourage collaborators to participate in the workshop together. Travel awards will be granted to top workshop applicants (individuals or groups). Applications are due January 14, 2020. Read more and learn how to apply <https://opensim.stanford.edu/support/event_details.php?id=238&title=OpenSim…> . *Apply to Be an OpenSim Fellow*We encourage new applicants to the OpenSim Fellows Program <https://opensim.stanford.edu/support/fellows.html>, an initiative from the OpenSim project and the National Center for Simulation in Rehabilitation Research. The goal of the Fellows Program is to cultivate and engage a community of OpenSim experts who will collectively advance the field of musculoskeletal modeling and simulation. Benefits include listing in the OpenSim consultants registry <https://simtk-confluence.stanford.edu/display/OpenSim/OpenSim+Fellows> and the ability to apply for teaching grants. Read more and learn how to apply <https://opensim.stanford.edu/support/fellows.html>. *OpenSim Moco Virtual Office Hours*OpenSim Moco <http://opensim.stanford.edu/moco> is a new toolkit for solving musculoskeletal optimal control problems, including both tracking simulations and predictive simulations. Want to talk directly with Moco’s developers to determine if Moco is the right tool for you? Sign up for our Virtual Office Hour <https://opensim-org.github.io/opensim-moco-site/blog/2019/11/26/introducing…>s, which we hold on a rolling basis. -- *Jennifer Hicks, Ph.D.* Director of Data Science | Mobilize Center <http://mobilize.stanford.edu> Associate Director | NCSRR <http://www.stanford.edu/group/opensim/about/index.html> R&D Manager | OpenSim <http://opensim.stanford.edu/> Stanford University 650-498-4403 | jenhicks(a)stanford.edu

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OpenSim Workshop at Stanford and Moco Software Release
by Jennifer Hicks 04 Dec '19

04 Dec '19

*Apply to the Next OpenSim Advanced User Workshop at Stanford University* *Applications Due: January 14, 2020Workshop Dates: March 24-26, 2020* We are now accepting applications for a three-day, project-based workshop on the Stanford University campus. This workshop is intended for advanced OpenSim users and developers who want to work with the OpenSim staff on specific research projects. We highly encourage collaborators to participate in the workshop together. Travel awards will be granted to top workshop applicants (individuals or groups). Applications are due January 14, 2020. Read more and learn how to apply <https://opensim.stanford.edu/support/event_details.php?id=238&title=OpenSim…> . *Download the Moco Software for Optimizing and Predicting the Motion of Musculoskeletal Models* We are pleased to announce the release of Moco <https://opensim.stanford.edu/moco>, a musculoskeletal simulation tool to extend the OpenSim software’s capabilities. Chris Dembia and Nick Bianco, of Stanford University, have led the development of the software, with valuable support from other members of the OpenSim community. Unlike many other such tools that can only track observed motions, Moco allows users to customize optimization cost functions and solve a variety of problems, including: - Motion tracking – Moco can estimate muscle forces that generated an observed motion while minimizing custom costs, including joint reaction loads. - Motion prediction – Moco can predict motions without relying on experimental data. - Parameter optimization – Moco can optimize parameters in a model, such as the stiffness of an exoskeleton. Learn more about Moco through the associated preprint <https://www.biorxiv.org/content/10.1101/839381v1> and webinar recording <https://www.youtube.com/watch?v=IYYZgyE33pU>. We will also be holding office hours <https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=1815&t=11248&p=0&start…> for those using or interested in Moco. Moco is freely available for download <https://simtk.org/projects/opensim-moco> from SimTK. -- *Jennifer Hicks, Ph.D.* Director of Data Science | Mobilize Center <http://mobilize.stanford.edu> Associate Director | NCSRR <http://www.stanford.edu/group/opensim/about/index.html> R&D Manager | OpenSim <http://opensim.stanford.edu/> Stanford University 650-498-4403 | jenhicks(a)stanford.edu

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Webinar on OpenSim Moco for Customizing Simulations; CAMS-Knee OpenSim Workshop
by Joy P. Ku 08 Nov '19

08 Nov '19

Join Our Next OpenSim Webinar "OpenSim Moco: Software to Optimize the Motion and Control of OpenSim Models" November 14, 2019 at 10am Pacific Standard Time Moco is a musculoskeletal simulation tool that extends OpenSim's capabilities. It allows users to customize optimization cost functions, such as minimizing metabolic energy or joint reaction loads, for their simulations. With its intuitive interface, Moco enables users to solve problems of motion tracking with custom cost functions; motion prediction without experimental data; and parameter optimization, such as in the design of an assistive device. Moco uses the direct collocation method. During the webinar, Moco developers and OpenSim team members Chris Dembia and Nick Bianco will discuss Moco features and applications, as well as provide a primer on direct collocation. Learn more and register<https://opensim.stanford.edu/support/event_details.php?id=236&title=Webinar…> Last Week for Early Bird Registration for CAMS-Knee Opensim Workshop February 4-7th, 2020 in Zürich, Switzerland November 15, 2019 - Early bird registration deadline We invite you to participate in a 4-day workshop, featuring a unique live collection of in vivo knee joint contact forces<http://www.wiki.orthoload.com/index.php/Knee_joint> and tendon loading datasets, which will be used by participants throughout the workshop. These measurements will be complemented by keynote lectures, software demonstrations, participant research talks, and free time for participants to work on their own projects and consult with experts. The workshop is based on the joint project "CAMS-Knee<https://cams-knee.orthoload.com/>" from the Laboratory for Movement Biomechanics, ETH Zurich & Julius Wolff Institute, Charité - Universitätmedizin Berlin. Next Friday, November 15th, is the last day to register at the early bird prices. Register now<https://opensim2020.ethz.ch/registration/> --- Joy P. Ku, PhD Project Manager, SimTK<http://simtk.org/> Director of Communications & Training, NCSRR<http://opensim.stanford.edu/> Director of Communications & Engagement, Mobilize Center<http://mobilize.stanford.edu/> Stanford University (w) 650.736.8434 Email: joyku(a)stanford.edu<mailto:joyku@stanford.edu>

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Updated Link for Tomorrow's OpenSim Webinar
by Joy P. Ku 23 Oct '19

23 Oct '19

Updated Link for This Month's OpenSim Webinar "Predictive Simulation of Biological Motion Using SCONE" October 24, 2019 at 11am Pacific Daylight Time We have a new link <https://stanford.webex.com/mw3300/mywebex/default.do?nomenu=true&siteurl=st…> for joining this month's webinar. If you are planning to join, please make sure you update your calendars. Details about the webinar are provided below. Predictive simulations generate motion trajectories that perform a specific task according to high-level objectives, such as walking speed or energy efficiency. This approach is useful for applications where the motion is unknown, for example, in predicting treatment outcomes. In this webinar, Thomas Geijtenbeek from Delft University will provide an introduction to predictive simulations and a new software framework SCONE<https://scone.software/> that enables individuals without programming skills to run predictive simulations. --- Joy P. Ku, PhD Project Manager, SimTK<http://simtk.org/> Director of Communications & Training, NCSRR<http://opensim.stanford.edu/> Director of Communications & Engagement, Mobilize Center<http://mobilize.stanford.edu/> Stanford University (w) 650.736.8434 Email: joyku(a)stanford.edu<mailto:joyku@stanford.edu>

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Predictive Simulation Webinar, Introductory OpenSim Webinar, and Predictions of Gait Adaptations Study
by Joy P. Ku 11 Oct '19

11 Oct '19

Join Our Next OpenSim Webinar "Predictive Simulation of Biological Motion Using SCONE" October 24, 2019 at 11am Pacific Daylight Time Predictive simulations generate motion trajectories that perform a specific task according to high-level objectives, such as walking speed or energy efficiency. This approach is useful for applications where the motion is unknown, for example, in predicting treatment outcomes. In this webinar, Thomas Geijtenbeek from Delft University will provide an introduction to predictive simulations and a new software framework SCONE<https://scone.software/> that enables individuals without programming skills to run predictive simulations. Learn more and register<https://opensim.stanford.edu/support/event_details.php?id=230&title=OpenSim…> Webinar: Jumping into Musculoskeletal Modeling with OpenSim October 16, 2019 at 8am Pacific Daylight Time Join us for an introductory tutorial on OpenSim given by Jennifer Hicks, NCSRR Associate Director and the OpenSim Research and Development Manager. As part of the European Society of Biomechanics webinar series, this webinar will highlight the main capabilities of OpenSim, including new features from the latest release of the software. Dr. Hicks will also demonstrate a typical pipeline for creating and visualizing a muscle-driven simulation starting with motion capture data of a subject jumping. Learn more and register<https://esbiomech.org/blog/2019/09/16/2nd-esb-webinar-announced/> Predicting Gait Adaptations Due to Ankle Plantarflexor Muscle Weakness and Contracture Carmichael Ong and colleagues at Stanford University have utilized the SCONE<https://scone.software/> predictive simulation framework to achieve realistic motions of walking at different speeds de novo. They utilize their framework to demonstrate how plantarflexor weakness and contracture result in heel walking and toe walking, respectively. Their research was just published in PLoS Computational Biology. The software and experimental data<https://simtk.org/projects/pfdeficitsgait> used in the study are available at SimTK. Read more<https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1006…> --- Joy P. Ku, PhD Project Manager, SimTK<http://simtk.org/> Director of Communications & Training, NCSRR<http://opensim.stanford.edu/> Director of Communications & Engagement, Mobilize Center<http://mobilize.stanford.edu/> Stanford University (w) 650.736.8434 Email: joyku(a)stanford.edu<mailto:joyku@stanford.edu>

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Metabolic Cost Modeling Webinar, CAMS-Knee Workshop, SCONE Software
by Joy P. Ku 16 Sep '19

16 Sep '19

Join the Next OpenSim Webinar "Metabolic Cost Modeling: Experimental Validation and Predictive Simulations" September 26, 2019 at 10am Pacific Daylight Time In this webinar, Anne Koelewijn from Friedrich-Alexander Universität Erlangen-Nürnberg and Antonie van den Bogert from Cleveland State University will discuss their investigation into whether muscle activation or metabolic energy is minimized during human movement. They will highlight their experimental validation of seven different metabolic models and discuss their predictive simulations using objectives of metabolic cost versus that of squared muscle activation. Learn more and register<https://simtk.webex.com/simtk/onstage/g.php?MTID=e229017b7d1fcac4c33e14bf5f…> Register for CAMS-Knee OpenSim Workshop February 4-7th, 2020 in Zürich, Switzerland November 1, 2019 - Abstract submission deadline November 15, 2019 - Early bird registration deadline We invite you to participate in a 4-day workshop, featuring a unique live collection of in vivo knee joint contact forces<http://www.wiki.orthoload.com/index.php/Knee_joint> and tendon loading datasets, which will be used by participants throughout the workshop. These measurements will be complemented by keynote lectures, software demonstrations, participant research talks, and free time for participants to work on their own projects and consult with experts. The workshop is based on the joint project "CAMS-Knee<https://cams-knee.orthoload.com/>" from the Laboratory for Movement Biomechanics, ETH Zurich & Julius Wolff Institute, Charité - Universitätmedizin Berlin. It is limited to 200 people, so please make sure to register early for the event. Participants are also encouraged to submit an abstract for research talks and poster awards. Register now<https://opensim2020.ethz.ch/registration/> Open-Source Software Framework Available to Predict Human Movement De Novo Thomas Geijtenbeek, a postdoctoral researcher at Delft University, has released the software SCONE<http://scone.software/> (Simulated Controller OptimizatioN Environment). Unlike traditional simulation approaches, which rely on existing data and cannot predict new behavior, SCONE computes motion trajectories based on high-level objectives such as stability, energy efficiency, and pain avoidance. The open-source software framework provides a graphical user interface and currently supports OpenSim models and simulations. The website provides several examples of tasks which utilize SCONE, including predictions of a standing high jump, healthy gait, and gait for individuals with weak plantarflexors and/or short hamstrings. SCONE builds upon Dr. Geijtenbeek's NCSRR Visiting Scholar project. Read more about SCONE<https://joss.theoj.org/papers/10.21105/joss.01421>. Download SCONE <https://scone.software/doku.php?id=install> --- Joy P. Ku, PhD Project Manager, SimTK<http://simtk.org/> Director of Communications & Training, NCSRR<http://opensim.stanford.edu/> Director of Communications & Engagement, Mobilize Center<http://mobilize.stanford.edu/> Stanford University (w) 650.736.8434 Email: joyku(a)stanford.edu<mailto:joyku@stanford.edu>

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OpenSim Community Events at ISB/ASB
by Jennifer Hicks 24 Jul '19

24 Jul '19

Are you attending ISB/ASB in Calgary? If so, please join us for a modeling and simulation meet-up and OpenSim office hours. More details about each event are below. *Join Us at a Modeling and Simulation Meet-Up at ISB/ASB* We are holding a meet-up for the modeling and simulation community at Greta Bar <https://www.gretabar.com/> on Friday, August 2, from 5pm to 8pm. Come network with other researchers who are using OpenSim and applying modeling and simulation to advance the field of biomechanics. All attendees are welcome to join. We will provide light appetizers (bar is no host). The venue is a short walk from the convention center. <https://goo.gl/maps/u77ieFD333HkGbuy8> We hope to see you there! *Sign-Up for OpenSim Office Hours at ISB/ASB* During the upcoming ISB/ASB Conference, we will hold Office Hours for researchers who are working with OpenSim. This is an opportunity to meet with OpenSim experts and discuss questions or issues related to musculoskeletal modeling and simulation with the OpenSim platform. We will hold office hours in 15-minute increments during the following hours: - *Wednesday, July 31*: 13:00 - 15:00 - *Thursday, August 1*: 13:00 - 13:50 and 16:05 - 17:50 - *Friday, August 2*: 13:00 - 13:50 and 16:05 - 17:05 - *Saturday, August 3*: 13:00 - 13:50 and 16:05 - 17:50 You can express your interest and register using this form <https://docs.google.com/forms/d/e/1FAIpQLSf_NgWDZtNgeY6l5mNiVcLI_at2QgTHL-z…>. We will use this information to match you with the availability of an appropriate mentor. We hope to accommodate as many people as possible, but if we are not able to accommodate everyone, priority will go in registration order. *Registration closes by the end-of-day, Monday, July 29. * Prior to the conference, we will contact you to confirm exact times and meeting locations. Please reach out to us if you have any questions or issues at opensim(a)stanford.edu. We look forward to seeing you at ISB/ASB 2019! -- *Jennifer Hicks, Ph.D.* Director of Data Science | Mobilize Center <http://mobilize.stanford.edu> Associate Director | NCSRR <http://www.stanford.edu/group/opensim/about/index.html> R&D Manager | OpenSim <http://opensim.stanford.edu/> Stanford University 650-498-4403 | jenhicks(a)stanford.edu

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Webinar, Visiting Scholars, Machine Learning Challenge, and ISB Events
by Jennifer Hicks 10 Jul '19

10 Jul '19

*Webinar: Human-machine Interfacing via Real-time Neuromechanical Modeling* *July 18, 2019 at 10am Pacific Time*We invite you to join us for a webinar featuring Massimo Sartori from the University of Twente. In this webinar, Sartori will describe a system for real-time model-based control of bionic limbs and robotic exoskeletons using OpenSim and the CEINMS open-source toolbox. Learn more and register <https://opensim.stanford.edu/support/event_details.php?id=221&title=Human-m…> . *2019 NCSRR Visiting Scholars Announced*The NCSRR is hosting its ninth round of Visiting Scholars this summer. The program is a unique experience that fosters expertise and collaborations in biomechanical simulations for rehabilitation research. We've selected four exceptional candidates from a highly competitive pool of applicants. Congratulations to our 2019 Scholars: Antoine Motte dit Falisse, Brett Steineman, Prasanna Sritharan, and Benjamin Wheatley. Read more about the scholars and their projects <https://opensim.stanford.edu/support/scholars.html#2019Scholars>. *Participate in a Machine Learning Challenge with OpenSim* *Round One Entries Due: October 13, 2019* Seungmoon Song and Łukasz Kidziński, postdoctoral fellows at Stanford University, are organizing a scientific challenge to develop a controller that enables a 3D human model to walk. Based on the OpenSim platform, this challenge is one of the official competitions at Neural Information Processing Systems (NeurIPS) 2019. The challenge this year includes a separate track for the most novel biomechanics solution. Prizes include an Xsens 3D motion capture suit and software license. Winners will also be invited to submit their solution to the Journal of NeuroEngineering and Rehabilitation and publish with no fee, if accepted. Details on how to participate, including information on free resources to get started, are available at the NeurIPS 2019: Learn to Move Challenge <https://www.aicrowd.com/challenges/neurips-2019-learn-to-move-walk-around> website. You can learn more about reinforcement learning and the challenge in our past webinar, Robust Control Strategies for Musculoskeletal Models Using Deep Reinforcement Learning <https://www.youtube.com/watch?v=M2D5xSSxshE>. *Learn about OpenSim Research at ISB* We are looking forward to seeing many members of the OpenSim community at the 2019 Congress of the International Society of Biomechanics (ISB) and the TGCS satellite meeting in just a few weeks. There are several opportunities to learn about the latest OpenSim research and development at Stanford and elsewhere: - *Attend a symposia chaired by OpenSim Fellows. *Fellows from Stanford University and several other institutions are organizing symposia with an exciting set of invited speakers. Topics include wearable sensing and breakthroughs in dynamic simulation. See the full list on the ISB website <https://isb2019.com/en/84-congress-info/88-symposia-topics>. - *Participate in a workshop at TGCS. *The OpenSim team will be running a workshop at the 17th International Symposium on Computer Simulation in Biomechanics (TGCS 2019) to introduce OpenSim Moco, a new software package for solving common problems in simulation biomechanics, including tracking simulations, predictive simulations, and muscle-redundancy problems. To participate in the workshop, register for TGCS and check the box for the OpenSim Workshop. Learn more <https://isbweb.org/~tgcs/iscsb-2019/canmore.html>. - *Stay tuned for more details about an OpenSim meet-up. *We are working on organizing an informal meet-up for researchers using musculoskeletal modeling and simulation. We'll share more details soon. -- *Jennifer Hicks, Ph.D.* Director of Data Science | Mobilize Center <http://mobilize.stanford.edu> Associate Director | NCSRR <http://www.stanford.edu/group/opensim/about/index.html> R&D Manager | OpenSim <http://opensim.stanford.edu/> Stanford University 650-498-4403 | jenhicks(a)stanford.edu

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