this paper presents the kinematic analysis and the development of a 4-degree-of-freedom serial-parallel mechanism for large commercial vehicle driving simulators. the degrees of freedom are selected according to the target maneuvers and the structure of human motion perception organs. several kinematic properties of parallel part of the mechanism under study are investigated, including the inve...

Considering the network structure is one of the new approaches in studying stochastic PERT networks (SPN). In this paper, planar networks are studied as a special class of networks. Two structural reducible mechanisms titled arc contraction and deletion are developed to convert any planar network to a series-parallel network structure. In series-parallel SPN, the completion time distribution f...

Considering the network structure is one of the new approaches in studying stochastic PERT networks (SPN). In this paper, planar networks are studied as a special class of networks. Two structural reducible mechanisms titled arc contraction and deletion are developed to convert any planar network to a series-parallel network structure.&#10In series-parallel SPN, the completion time distribution...

This paper presents the kinematic design of a translational parallel mechanism (PM) named Vari-Orthoglide by means workspace superposition, according to sub-kinematic chain (SKC) based PM composition principle. The main topological characteristics manipulator with two SKCs under study, such as position and orientation (POC) characteristics, degree freedom (DOF) coupling are analyzed, which turn...

The anisotropy of solar wind turbulence is a critical issue in understanding the physics energy transfer between scales and conversion fields particles heliosphere. Using measurement \emph{Parker Solar Probe} (\emph{PSP}), we present an observation at kinetic slow, Alfv\'enic, inner \textbf{The magnetic compressibility behaves as expected for Alfv\'enic below ion scale.} A steepened transition ...