Results 71 to 80 of about 2,384,762 (293)

Positioning Accuracy Analysis of the Parallel Mechanism Near Singular Positions

open access: yesInternational Journal of Applied Mechanics and Engineering, 2015
This paper presents a method of numerical modelling of parallel mechanisms with clearances in their kinematic pairs taken into account. The pairs with clearances are modelled as shape connections based on constraints in the form of contact interactions ...
J. Bałchanowski
doaj   +1 more source

Multibody Dynamics Model of a Human Hand for Haptics Interaction [PDF]

open access: yes, 2008
In this paper we propose a strategy for modelling a human hand for Haptics interaction. The strategy consists in a parallel computing architecture that calculates the dynamics of a hand; this is accomplished by computing the dynamics of each finger in a ...
Aracil Santonja, Rafael   +5 more
core   +1 more source

Formalization of Phase Ordering

open access: yes, 2016
Phasers pose an interesting synchronization mechanism that generalizes many collective synchronization patterns seen in parallel programming languages, including barriers, clocks, and point-to-point synchronization using latches or semaphores.
Cogumbreiro, Tiago   +2 more
core   +2 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

Design of Novel Human Wrist Prostheses Based on Parallel Architectures: Dimensional Synthesis and Kinetostatics

open access: yesBiomimetics
The human wrist affects the ability to efficiently perform many manipulation tasks. Despite this, most upper-limb prostheses are focused on the hand’s mobility, which makes users compensate for the lost wrist mobility with complex manipulation strategies
Raffaele Di Gregorio
doaj   +1 more source

Stochastic Particle Acceleration in Parallel Relativistic Shocks

open access: yes, 2005
We present results of test-particle simulations on both the first- and the second-order Fermi acceleration for relativistic parallel shock waves.
Vainio, Rami, Virtanen, Joni J. P.
core   +1 more source

Parallel moving mechanical systems

open access: yesIndependent Journal of Management & Production, 2014
Moving mechanical systems parallel structures are solid, fast, and accurate. Between parallel systems it is to be noticed Stewart platforms, as the oldest systems, fast, solid and precise. The work outlines a few main elements of Stewart platforms.
Petrescu, Florian Ion Tiberius   +1 more
openaire   +3 more sources

Organ‐specific redox imbalances in spinal muscular atrophy mice are partially rescued by SMN antisense oligonucleotides

open access: yesFEBS Letters, EarlyView.
We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley   +1 more source

Kinematics and Workspace Analysis of 4-SPRR-SPR 5-DOF Parallel Mechanism

open access: yesJixie chuandong, 2019
Taking a 2T3R 5-DOF 4-SPRR-SPR parallel mechanism with rotating axis as the moving platform as the research object, the degree of freedom of the 4-SPRR-SPR parallel mechanism is analyzed by the screw theory, the inverse kinematics equation of the ...
Guo Qiang Cui Guohua Zhang Fan Yu Haidong Cheng Zhenyi
doaj  

Topology Synthesis for In-Situ Machining Mechanism With Dual Platforms and Decoupled Motions of Position and Rotation

open access: yesIEEE Access
To satisfy the complex surface machining requirement for the high attitude adjustment capability of the in-situ machining mechanism, this paper carries out the topology synthesis of the mechanism with dual platforms and decoupled motions of position and ...
Yang Qi, Jinhan Yang, Xinran Tong
doaj   +1 more source

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