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Motor strategies and adiabatic invariants: The case of rhythmic motion in parabolic flights
05 août 2021,
- CeREF Technique
,
- Article scientifique
Article scientifique
The role of gravity in human motor control is at the same time obvious and difficult to isolate. It can be
assessed by performing experiments in variable gravity. We propose that adiabatic invariant theory may be used
to reveal nearly conserved quantities in human voluntary rhythmic motion, an individual being seen as a complex
time-dependent dynamical system with bounded motion in phase space. ...
Perceived Usefulness of Telerehabilitation of Musculoskeletal Disorders: A Belgium–France Pilot Study during Second Wave of COVID-19 Pandemic
22 novembre 2021,
- CeREF Technique
,
- Article scientifique
Article scientifique
Background: COVID-19 has affected the practice of physiotherapy, and telerehabilitation (TR) may be seen as an alternative model of care if it is accepted by patients and physiotherapists. This study investigates the perceived usefulness of TR and the intention to use it among physiotherapists and patients from Belgium and France concerned with musculoskeletal disorders (MSDs) during the pandemic ...
A First-Quantized Model for Unparticles and Gauge Theories around Conformal Window
02 décembre 2021,
- CeREF Technique
,
- Article scientifique
Article scientifique
We first quantize an action proposed by Casalbuoni and Gomis in 2014 that describes two massless relativistic scalar particles interacting via a conformally invariant potential. The spectrum is a continuum of massive states that may be interpreted as unparticles. We then obtain in a similar way the mass operator for a deformed action in which two terms are introduced that break the conformal symmetry: ...
Fine adaptive precision grip control without maximum pinch strength changes after upper limb neurodynamic mobilization
30 juin 2021,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
Before and immediately after passive upper limb neurodynamic mobilizations targeting the median
nerve, grip ( GF ) and load ( LF ) forces applied by the thumb, index and major fingers (three-jaw chuck
pinch) were collected using a manipulandum during three different grip precision tasks: grip-lifthold-
replace (GLHR), vertical oscillations (OSC), and vertical oscillations with up and down ...
Low-Cost Sensors and Biological Signals
21 février 2021,
- CeREF Technique
,
- Article scientifique
Article scientifique
Editorial of the Special issue Low-Cost sensors and Biological signals
https://www.mdpi.com/journal/sensors/special_issues/LCSBS
Clinical and MRI changes of puborectalis and iliococcygeus after a short period of intensive pelvic floor muscles training with or without instrumentation
13 juin 2018,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
Purpose This study evaluates the impact of a 3-week period of intensive pelvic floor muscles training (PFMT), with or
without instrumentation, on clinical and static magnetic resonance imaging (MRI) changes of puborectalis (PR) and iliococcygeus
(IL) muscles.
Methods 24 healthy young women were enrolled in the study and 17 achieved the 9 sessions of 30 min training exercises
and conducted all ...
Ergonomic Risk Assessment of Developing Musculoskeletal Disorders in Workers with the Microsoft Kinect: TRACK TMS
19 octobre 2018,
- CeREF Technique
,
- Article scientifique
Article scientifique
Compte rendu de la conférence JETSAN 2017
Adiabatic invariants drive rhythmic human motion in variable gravity
01 décembre 2020,
- CeREF Technique
,
- Article scientifique
Article scientifique
Voluntary human movements are stereotyped. When modeled in the framework of classical mechanics they are expected to minimize cost functions that may include energy, a natural candidate from a physiological point of view also. In time-changing environments, however, energy is no longer conserved—regardless of frictional energy dissipation—and it is therefore not the preferred candidate for any cost ...
Gravitating Bubbles of Gluon Plasma above Deconfinement Temperature
13 octobre 2020,
- CeREF Technique
,
- Article scientifique
Article scientifique
The equation of state of SU(3) Yang–Mills theory can be modelled by an effective Z3−
symmetric potential depending on the temperature and on a complex scalar field ϕ
. Allowing ϕ
to be dynamical opens the way to the study of spatially localized classical configurations of the scalar field. We first show that spherically symmetric static Q-balls exist in the range (1−1.21)×Tc
, Tc
being the ...
The Formulations of Classical Mechanics with Foucault’s Pendulum
01 octobre 2020,
- CERDECAM
,
- Article scientifique
Article scientifique
Since the pioneering works of Newton (1643–1727), Mechanics has been constantly reinventing itself: reformulated in particular by Lagrange (1736–1813) then Hamilton (1805–1865), it now offers powerful conceptual and mathematical tools for the exploration of dynamical systems, essentially via the action-angle variables formulation and more generally through the theory of canonical transformations. ...