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Lucas Colabella, Adrián P Cisilino, Guillaume Häiat, Piotr Kowalczyk
Bone tissue mechanical properties and trabecular microarchitecture are the main factors that determine the biomechanical properties of cancellous bone. Artificial cancellous microstructures, typically described by a reduced number of geometrical parameters, can be designed to obtain a mechanical behavior mimicking that of natural bone. In this work, we assess the ability of the parameterized microstructure introduced by Kowalczyk (Comput Methods Biomech Biomed Eng 9:135-147, 2006. doi: 10.1080/10255840600751473 ) to mimic the elastic response of cancellous bone...
April 3, 2017: Biomechanics and Modeling in Mechanobiology
G T Harding, M J Dunbar, C L Hubley-Kozey, W D Stanish, J L Astephen Wilson
No abstract text is available yet for this article.
March 2017: Clinical Biomechanics
Kohei Watanabe, Motoki Kouzaki, Toshio Moritani
Our recent studies showed the rectus femoris (RF) muscle is regionally regulated during the level walking and this unique neuromuscular activation pattern is influenced by aging (Watanabe et al., 2014, 2016 J Biomech). We aimed to investigate and compare regional neuromuscular activation patterns along the RF muscle between the young and elderly during the stair walking. Fourteen young men (age: 20.4±1.0years) and 14 elderly men (age: 73.8±5.9years) performed the stair ascent and descent. Fifteen trials of three steps were performed for both stair ascent and descent...
November 10, 2016: Gait & Posture
A Caiazzo, F Caforio, G Montecinos, L O Muller, P J Blanco, E F Toro
This work presents a detailed investigation of a parameter estimation approach based on the reduced order unscented Kalman filter (ROUKF) in the context of one-dimensional blood flow models. In particular, the main aims of this study are (i) to investigate the effects of using real measurements versus synthetic data for the estimation procedure (i.e., numerical results of the same in silico model, perturbed with noise) and (ii) to identify potential difficulties and limitations of the approach in clinically realistic applications in order to assess the applicability of the filter to such setups...
October 25, 2016: International Journal for Numerical Methods in Biomedical Engineering
H Lu, K B Lua, Y J Lee, T T Lim, K S Yeo
This paper reports the results of combined experimental and numerical studies on the ground effect on a pair of three-dimensional (3D) hovering wings. Parameters investigated include hovering kinematics, wing shapes, and Reynolds numbers (Re). The results are consistent with the observation by another study (Gao and Lu, 2008 Phys. Fluids, 20 087101) which shows that the cycle-averaged aerodynamic forces generated by two-dimensional (2D) wings in close proximity to the ground can be broadly categorized into three regimes with respect to the ground clearance; force enhancement, force reduction, and force recovery...
October 25, 2016: Bioinspiration & Biomimetics
Arian Vistamehr, Steven A Kautz, Mark G Bowden, Richard R Neptune
No abstract text is available yet for this article.
September 6, 2016: Journal of Biomechanics
Tsz Hin Hui, Fan Zheng, Yuan Lin, Chuanhai Fu
No abstract text is available yet for this article.
September 6, 2016: Journal of Biomechanics
Anna Lee, Tanvi Bhatt, Yi-Chung Pai
No abstract text is available yet for this article.
September 6, 2016: Journal of Biomechanics
Heather A Himburg, Deborah M Grzybowski, Andrew L Hazel, Jeffrey A LaMack, Morton H Friedman
The biological response of living arteries to mechanical forces is an important component of the atherosclerotic process and is responsible, at least in part, for the well-recognized spatial variation in atherosusceptibility in man. Experiments to elucidate this response often generate maps of force and response variables over the arterial surface, from which the force-response relationship is sought. Rowland et al. discussed several statistical approaches to the spatial autocorrelation that confounds the analysis of such maps and applied them to maps of hemodynamic stress and vascular response obtained by averaging these variables in multiple animals...
September 1, 2016: Journal of Biomechanical Engineering
Hong-Jung Hsieh, Chih-Chung Hu, Tung-Wu Lu, Hsuan-Lun Lu, Mei-Ying Kuo, Chien-Chung Kuo, Horng-Chaung Hsu
BACKGROUND: Robot-based joint-testing systems (RJTS) can be used to perform unconstrained laxity tests, measuring the stiffness of a degree of freedom (DOF) of the joint at a fixed flexion angle while allowing the other DOFs unconstrained movement. Previous studies using the force-position hybrid (FPH) control method proposed by Fujie et al. (J Biomech Eng 115(3):211-7, 1993) focused on anterior/posterior tests. Its convergence and applicability on other clinically relevant DOFs such as valgus/varus have not been demonstrated...
June 7, 2016: Biomedical Engineering Online
Kim Allison, Tim V Wrigley, Bill Vicenzino, Kim L Bennell, Alison Grimaldi, Paul W Hodges
No abstract text is available yet for this article.
July 2016: Clinical Biomechanics
R Penta, K Raum, Q Grimal, S Schrof, A Gerisch
UNLABELLED: Recent experimental data revealed a stiffening of aged cortical bone tissue, which could not be explained by common multiscale elastic material models. We explain this data by incorporating the role of mineral fusion via a new hierarchical modeling approach exploiting the asymptotic (periodic) homogenization (AH) technique for three-dimensional linear elastic composites. We quantify for the first time the stiffening that is obtained by considering a fused mineral structure in a softer matrix in comparison with a composite having non-fused cubic mineral inclusions...
May 19, 2016: Bioinspiration & Biomimetics
Hsuan-Yu Chou, Sinan Müftü
No abstract text is available yet for this article.
April 21, 2016: Journal of Biomechanics
(no author information available yet)
No abstract text is available yet for this article.
March 2016: Journal of Biomechanical Engineering
Fabio Giuliano Caetano, Murilo José de Oliveira, Ana Lorena Marche, Fábio Yuzo Nakamura, Sergio Augusto Cunha, Felipe Arruda Moura
In the article by Caetano FG, et al, "Characterization of the Sprint and Repeated-Sprint Sequences Performed by Professional Futsal Players, According to Playing Position, During Official Matches," in the J Appl Biomech, 31(6), pp. 423-429,, the second author's name was incorrectly listed as Murilo José de Oliveira. The second author's name should have been listed as Murilo José de Oliveira Bueno.
February 2016: Journal of Applied Biomechanics
Luca Modenese, Elena Ceseracciu, Monica Reggiani, David G Lloyd
A challenging aspect of subject specific musculoskeletal modeling is the estimation of muscle parameters, especially optimal fiber length and tendon slack length. In this study, the method for scaling musculotendon parameters published by Winby et al. (2008), J. Biomech. 41, 1682-1688, has been reformulated, generalized and applied to two cases of practical interest: 1) the adjustment of muscle parameters in the entire lower limb following linear scaling of a generic model and 2) their estimation "from scratch" in a subject specific model of the hip joint created from medical images...
January 25, 2016: Journal of Biomechanics
Thomas Stief, Klaus Peikenkamp
BACKGROUND: Stress occurring at the feet while wearing footwear is often determined using pressure measurement systems. However, other forms of stress, such as bending, torsional and shear loadings, cannot be detected in shoes during day-to-day activities. Nevertheless, the detection of these types of stresses would be helpful for understanding the mechanical aspects of various kinds of hard and soft tissue injuries. Therefore, we describe the development of a new measuring device that allows the reliable determination of bending and torsional load at the foot in shoes...
2015: Journal of Foot and Ankle Research
Natalie C Pearson, James M Oliver, Rebecca J Shipley, Sarah L Waters
We present a simplified two-dimensional model of fluid flow, solute transport, and cell distribution in a hollow fibre membrane bioreactor. We consider two cell populations, one undifferentiated and one differentiated, with differentiation stimulated either by growth factor alone, or by both growth factor and fluid shear stress. Two experimental configurations are considered, a 3-layer model in which the cells are seeded in a scaffold throughout the extracapillary space (ECS), and a 4-layer model in which the cell-scaffold construct occupies a layer surrounding the outside of the hollow fibre, only partially filling the ECS...
June 2016: Biomechanics and Modeling in Mechanobiology
Lowell T Edgar, James B Hoying, Jeffrey A Weiss
Mechanical interactions during angiogenesis, i.e., traction applied by neovessels to the extracellular matrix and the corresponding deformation, are important regulators of growth and neovascularization. We have previously designed, implemented, and validated a coupled model of angiogenesis in which a discrete microvessel growth model interacts with a continuous finite element mesh through the application of local remodeling sprout stresses (Edgar et al. in Biomech Model Mechanobiol, 2014). However, the initial implementation of this framework does not take matrix density into account when determined these remodeling stresses and is therefore insufficient for the study of angiogenesis within heterogeneous matrix environments such as those found in vivo...
July 2015: Annals of Biomedical Engineering
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