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The Force and Motion Foundation is a 501(c)(3) non-profit organization whose
purpose is to support students in fields related to multi-axis force measurement
and testing. Fully funded by AMTI, The Foundation awards travel grants to aid
promising graduate students on their paths to becoming the scientific leaders of
tomorrow. The Foundation also serves as creator and curator of the Virtual
Poster Session, an international resource for information exchange and
networking within the academic community.

 

Just click the orange tabs to learn more about all the foundation has to
offer...

 

Since its inception, The Foundation has granted $220,000.00 in academic
scholarships and $119,000.00 in travel awards

 

 

 


HAPPENING NOW...

Submit your Scientific Poster for 2023 2nd  Quarter $1000 Academic Travel
Scholarships now 

Congratulations to recent Travel Awardees for 2022:

Erik Kowalski- University of Ottawa; Deanna Demarco- Elon University; Alexandre 
Pelegrinelli- State University of Londrina; Steven Voiner-University of
Delaware; Seunguk-Han Brigham Young University; Danielle-Howe North Carolina
State; Erica Hinton-University of Nebraska; Lauren Luginsland-Old Dominion
University

.


RECENT POSTERS

Task-Invariant Learning of Continuous Joint Kinematics during Steady-State and
Transient Ambulation Using Ultrasound Sensing



Natural control of limb motion is continuous and progressively adaptive to
individual intent. While intuitive interfaces have the potential to rely on the
neuromuscular input by the user for continuous adaptation, continuous volitional
control of assistive devices that can generalize across various tasks has not
been addressed. In this study, we propose a method to use spatiotemporal
ultrasound features of the rectus femoris and vastus intermedius muscles of
able-bodied individuals for task-invariant learning of continuous knee
kinematics during steady-state and transient ambulation. The task-invariant
learning paradigm was statistically evaluated against a task-specific paradigm
for the steady-state (1) level-walk, (2) incline, (3) decline, (4) stair ascent,
and (5) stair descent ambulation tasks. The transitions between steady-state
stair ambulation and level-ground walking were also investigated. It was
observed that the continuous knee kinematics can be learned using a
task-invariant learning paradigm with statistically comparable accuracy to a
task-specific paradigm. Statistical analysis further revealed that incorporating
the temporal ultrasound features significantly improves the accuracy of
continuous estimations (p < 0.05). The average root mean square errors (RMSEs)
of knee angle and angular velocity estimation were 7.06° and 53.1°/sec,
respectively, for the task-invariant learning compared to 6.00° and 51.8°/sec
for the task-specific models. High accuracy of continuous task-invariant
paradigms overcome the barrier of task-specific control schemes and motivate the
implementation of direct volitional control of lower-limb assistive devices
using ultrasound sensing, which may eventually enhance the intuitiveness and
functionality of these devices towards a "free form" control approach.


Listed In: Biomechanical Engineering, Gait
Effects of Dual Task and Repetition on Five-Times Sit-To-Stand Task in Healthy
Young Adults



Clinically, the five-times STS task (FTSTS) is used to assess balance and muscle
efficiency in the lower extremities of various populations. However, the changes
that occur in body mechanics with greater repetitions and the effects of dual
tasking while performing FTSTS are currently unknown. PURPOSE: To determine the
effects of dual tasking and multiple repetitions on the FTSTS task in healthy,
young adults. METHODS:10 healthy adults (age 24 (4.1) years) stood up and sat
down five times fast without (SingleTask) and with a concurrent cognitive task
of counting backwards by 3 (DualTask). Time to complete FTSTS was measured.
Impulse (Ns/BW), peak force (N/BW), and power (Nm/BW.s) were calculated using
ground reaction forces. A 2-way ANOVA and paired samples t-test were conducted.
RESULTS: Participants took significantly longer to complete FTSTS during
DualTask (8.16[1.77]s) vs. SingleTask (7.38[1.08]; p=.05). Concentric impulse
significantly increased from 0.55 (0.02) during SingleTask to 0.59 (0.03) during
DualTask (p=.022). Power significantly decreased from 0.99 (0.04) during
SingleTask to 0.92 (0.05) during DualTask (p=.017). FTSTS concentric, and
eccentric impulse significantly increased from 1st to 5th repetition
respectively: 0.56 (0.03) to 0.59 (0.03; p=.005), 0.49 (0.03) to 0.56 (0.04;
p=.013). Also, standing peak force significantly decreased from 1st repetition
(1.39[0.03]) to 5th repetition (1.34[0.03]; p=.004). The mean peak force
standing decreased more from 1st to 5th repetition under SingleTask (1.39[0.04]
to 1.32[0.03]) compared to DualTask (1.39[0.03] to 1.35[0.03]; p=.044).
CONCLUSION: Force characteristics are altered by both dual tasking and number of
repetitions during the FTSTS task in healthy, young adults.


Listed In: Biomechanics, Physical Therapy
Role of Biphasic Tissue Properties in Regulating Articulation-Induced Cartilage
Rehydration



Healthy articular cartilage supports load bearing and frictional properties
unmatched among biological tissues and man-made bearing materials. Balancing
fluid exudation and recovery under loaded and articulated conditions is
essential to the tissue’s biological and mechanical longevity. Our prior
tribological investigations, which leveraged the convergent stationary contact
area (cSCA) configuration, revealed that sliding alone can modulate cartilage
interstitial fluid pressurization and the recovery and maintenance of
lubrication under load through a mechanism termed ‘tribological rehydration.’
Our recent comparative assessment of tribological rehydration revealed
remarkably consistent sliding speed-dependent fluid recovery and lubrication
behaviors across femoral condyle cartilage from five mammalian species
(equine/horse, bovine/cow, porcine/pig, ovine/sheep, and caprine/goat). In the
present study, we identified and characterized key predictive relationships
among tissue properties, sliding-induced tribological rehydration, and the
modulation/recovery of lubrication within healthy articular cartilage. Using
correlational analysis, we linked observed speed-dependent tribological
rehydration behaviors to cartilage’s geometry and biphasic properties (tensile
and compressive moduli, permeability). Together, these findings demonstrate that
easily measurable tissue characteristics (e.g., bulk tissue material properties,
compressive strain magnitude, and strain rates) can be used to predict
cartilage’s rehydration and lubricating abilities, and ultimately its function
in vivo.


Listed In: Biomechanical Engineering, Biotribology


THE FORCE AND MOTION FOUNDATION UPDATES...

 

The Force and Motion Foundation 



 

Submit your 2023 2nd Quarter Scientific Poster NOW for the F&M $1000 Travel
Scholarship! 

 

*F & M Foundation allows for one submission per year, per individual, with a
total maximum award to be granted per individual of $2000 over their lifetime,
(2 submissions)

 

Please check back in the future for information on more scholarship offers 

 



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