scholarly journals Scale-free center-of-mass displacement correlations in polymer melts without topological constraints and momentum conservation: A bond-fluctuation model study

2011 ◽  
Vol 134 (23) ◽  
pp. 234901 ◽  
Author(s):  
J. P. Wittmer ◽  
P. Polińska ◽  
H. Meyer ◽  
J. Farago ◽  
A. Johner ◽  
...  
Keyword(s):  
Polymer Melts ◽  
Center Of Mass ◽  
Momentum Conservation ◽  
Scale Free ◽  
Topological Constraints ◽  
Model Study ◽  
Mass Displacement ◽  
Bond Fluctuation ◽  
Fluctuation Model

Dynamics of Polymer Melts above the Glass Transition:  Monte Carlo Studies of the Bond Fluctuation Model

1997 ◽  
Vol 30 (10) ◽  
pp. 3075-3085 ◽  
Author(s):  
K. Okun ◽  
M. Wolfgardt ◽  
J. Baschnagel ◽  
K. Binder
Keyword(s):  
Monte Carlo ◽  
Glass Transition ◽  
Polymer Melts ◽  
Monte Carlo Studies ◽  
Bond Fluctuation ◽  
Fluctuation Model

Statics and Dynamics of Bidisperse Polymer Melts:  A Monte Carlo Study of the Bond-Fluctuation Model

1998 ◽  
Vol 31 (12) ◽  
pp. 3856-3867 ◽  
Author(s):  
J. Baschnagel ◽  
W. Paul ◽  
V. Tries ◽  
K. Binder
Keyword(s):  
Monte Carlo ◽  
Polymer Melts ◽  
Monte Carlo Study ◽  
Statics And Dynamics ◽  
Bond Fluctuation ◽  
Fluctuation Model

scholarly journals A finite excluded volume bond-fluctuation model: Static properties of dense polymer melts revisited

2009 ◽  
Vol 131 (6) ◽  
pp. 064901 ◽  
Author(s):  
J. P. Wittmer ◽  
A. Cavallo ◽  
T. Kreer ◽  
J. Baschnagel ◽  
A. Johner
Keyword(s):  
Polymer Melts ◽  
Excluded Volume ◽  
Static Properties ◽  
Bond Fluctuation ◽  
Fluctuation Model

Conformation and segmental mobility of a diluted single polymer chain simulated with bond fluctuation model

2012 ◽  
Vol 358 (12-13) ◽  
pp. 1452-1458 ◽  
Author(s):  
R. Sabater i Serra ◽  
C. Torregrosa-Cabanilles ◽  
J.M. Meseguer-Dueñas ◽  
J.L. Gómez Ribelles ◽  
J. Molina-Mateo
Keyword(s):  
Polymer Chain ◽  
Segmental Mobility ◽  
Single Polymer Chain ◽  
Bond Fluctuation ◽  
Fluctuation Model

scholarly journals Reactive Postural Responses to Continuous Yaw Perturbations in Healthy Humans: The Effect of Aging

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 63 ◽  
Author(s):  
Ilaria Mileti ◽  
Juri Taborri ◽  
Stefano Rossi ◽  
Zaccaria Del Prete ◽  
Marco Paoloni ◽  
...  
Keyword(s):  
Older Adults ◽  
Balance Control ◽  
Center Of Mass ◽  
Community Dwelling ◽  
Body Segments ◽  
Healthy Humans ◽  
Eyes Closed ◽  
Age Related ◽  
Postural Responses ◽  
Mass Displacement

Maintaining balance stability while turning in a quasi-static stance and/or in dynamic motion requires proper recovery mechanisms to manage sudden center-of-mass displacement. Furthermore, falls during turning are among the main concerns of community-dwelling elderly population. This study investigates the effect of aging on reactive postural responses to continuous yaw perturbations on a cohort of 10 young adults (mean age 28 ± 3 years old) and 10 older adults (mean age 61 ± 4 years old). Subjects underwent external continuous yaw perturbations provided by the RotoBit1D platform. Different conditions of visual feedback (eyes opened and eyes closed) and perturbation intensity, i.e., sinusoidal rotations on the horizontal plane at different frequencies (0.2 Hz and 0.3 Hz), were applied. Kinematics of axial body segments was gathered using three inertial measurement units. In order to measure reactive postural responses, we measured body-absolute and joint absolute rotations, center-of-mass displacement, body sway, and inter-joint coordination. Older adults showed significant reduction in horizontal rotations of body segments and joints, as well as in center-of-mass displacement. Furthermore, older adults manifested a greater variability in reactive postural responses than younger adults. The abnormal reactive postural responses observed in older adults might contribute to the well-known age-related difficulty in dealing with balance control during turning.

Sign in / Sign up

Export Citation Format

Share Document