Improved Hill-type musculotendon models with activation-force-length coupling

2018 ◽  
Vol 26 (6) ◽  
pp. 909-920
Author(s):  
Lixin Sun ◽  
Yingfei Sun ◽  
Zhipei Huang ◽  
Jiateng Hou ◽  
Jiankang Wu
Keyword(s):  
Activation Force

scholarly journals Superelasticity and force plateau of nickel-titanium springs: an in vitro study

2016 ◽  
Vol 21 (3) ◽  
pp. 46-55 ◽  
Author(s):  
Camila Ivini Viana Vieira ◽  
Sergei Godeiro Fernandes Rabelo Caldas ◽  
Lídia Parsekian Martins ◽  
Renato Parsekian Martins
Keyword(s):  
Analysis Of Variance ◽  
In Vitro Study ◽  
Nickel Titanium ◽  
Vitro Study ◽  
Lack Of Information ◽  
Activation Force ◽  
Post Hoc

abstract Objective: This paper analyzed whether nickel-titanium closed coil springs (NTCCS) have a different superelastic (SE) behavior according to activation and whether their force plateau corresponds to that informed by the manufacturer. Methods: A total of 160 springs were divided into 16 subgroups according to their features and activated proportionally to the length of the extensible part (NiTi) of the spring (Y). The force values measured were analyzed to determine SE rates and force plateaus, which were mathematically calculated. These plateaus were compared to those informed by the manufacturer. Analysis of variance was accomplished followed by Tukey post-hoc test to detect and analyze differences between groups. Results: All subgroups were SE at the activation of 400% of Y length, except for: subgroups 4B and 3A, which were SE at 300%; subgroups 4E and 4G, which were SE at 500%; and subgroup 3C, which was SE at 600%. Subgroup 3B did not show a SE behavior. Force plateaus depended on activation and, in some subgroups and some activations, were similar to the force informed. Conclusions: Most of the springs showed SE behavior at 400% of activation. Force plateaus are difficult to compare due to lack of information provided by manufacturers.

Effect of activation force on knee extensor torques

1991 ◽  
Vol 23 (2) ◽  
pp. 231???237 ◽  
Author(s):  
JOHN F. KRAMER ◽  
MARGARET D. VAZ ◽  
DONNA HAKANSSON
Keyword(s):  
Knee Extensor ◽  
Activation Force

Activation force-based air pollution tracing

2016 ◽  
Author(s):  
Huanyu Zhou ◽  
Ni Zhang ◽  
Di Huang ◽  
Zhanyu Ma ◽  
Weisong Hu ◽  
...  
Keyword(s):  
Air Pollution ◽  
Activation Force

The Muscle Activation-Force Relationship Is Unaffected by Ischaemic Recovery

1997 ◽  
Vol 22 (5) ◽  
pp. 468-478 ◽  
Author(s):  
David G. Behm ◽  
Diane M. M. St-Pierre
Keyword(s):  
Muscle Activation ◽  
Polynomial Equation ◽  
Second Order ◽  
Plantar Flexors ◽  
General Estimate ◽  
Significant Difference ◽  
Order Polynomial ◽  
Activation Force ◽  
Relationship Of ◽  
Force Relationship

Since reported changes in muscle activation following fatigue could be affected by alterations in muscle contractile properties, the plantar flexors' activation-force relationship was investigated before and following an isometric, intermittent, submaximal, fatigue protocol. Voluntary and evoked force and muscle activation was tested pre- and postfatigue with ischaemic and nonischaemic recovery. The muscle activation-force relationship of ischaemic and nonischaemic groups was best described by a second-order polynomial equation with similar y intercepts, slopes, and curvature of the slopes. A significantly increased muscle activation-force slope during recovery may be attributed to decreased muscle activation and not impaired muscle kinetics. The index of muscle activation immediately postfatigue was not significantly different between ischaemic and nonischaemic groups (88.5% vs. 92.7%). No significant difference in the estimate of muscle activation postfatigue with polynomials and interpolated twitch (IT) ratios (superimposed/potentiated doublets) suggested that IT ratios can be used as a general estimate of muscle inactivation following fatigue. Key words: fatigue, interpolated twitch technique, second-order polynomial, ischaemia

Mining activation force defined dependency patterns for relation extraction

2015 ◽  
Vol 86 ◽  
pp. 278-287 ◽  
Author(s):  
Chunyun Zhang ◽  
Yichang Zhang ◽  
Weiran Xu ◽  
Zhanyu Ma ◽  
Yan Leng ◽  
...  
Keyword(s):  
Relation Extraction ◽  
Activation Force
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