[1] For simplicity, a constant gravitational acceleration (~g) is assumed in many general circulation models (GCMs). To estimate the influence of the altitudinal variation of the ~g on the thermosphere simulation, two runs have been made under the solar maximum condition using the non-hydrostatic Global Ionosphere Thermosphere Model (GITM), including one with a constant ~g (8.7 m/s) and the oth...

It has been demonstrated that endurance exercise and chronic acceleration, i.e., hypergravity, produce comparable adaptations in a variety of physiological systems, including decreased adiposity, increased energy metabolism, and altered intermediary metabolism. Similar adaptations have not been demonstrated for skeletal muscle per se. To further differentiate between these general responses wit...

The trajectory planning, which is known as a movement from starting to end point by satisfying the constraints along the path is an essential part of robot motion planning. A common way to create trajectories is to deal with polynomials which have independent coefficients. This paper presents a trajectory formulation as well as a procedure to arrange the suitable trajectories for applications. ...

a new mechanical cultivator was proposed for mechanical weeding in part one. the precise point method was used to geometric design of this new cultivator. the aim of this research is selecting the suitable mechanism of the studied mechanisms in part one. the velocity and acceleration of links (kinematic) is the base of dynamic analysis of the systems. the variation of velocity, acceleration and...

A convincing explanation for the nature of dark energy and matter is still missing. In recent works a RG-improved swiss-cheese cosmology with an evolving cosmological constant dependent on Sch\"ucking radius has been proven to be promising model explain observed cosmic acceleration. this work we extend consider combined scaling Newton $G$ $\mathrm{\ensuremath{\Lambda}}$ according IR-fixed point...

The implementation and performance of a surface acoustic wave (SAW)-based acceleration sensor is described. The sensor was composed of a flexible ST-X quartz cantilever beam with a relatively substantial proof mass at the undamped end, a pattern of a two-port SAW resonator deposited directly on the surface of the beam adjacent to the clamped end for maximum strain sensitivity and a SAW resonato...

Motorcycle helmets are essential for reducing the risk of head injuries in the event of an impact. However, during the design of helmets, a compromise must be made between user safety and user comfort. Accordingly, the present study proposes a novel open-face helmet design, in which the helmet features three ventilation slots in the upper-head region. Finite element analysis (FEA) models were c...

Operators of agricultural machinery are exposed to an extensive range of indirect vibrations through the seats, which gradually causes chronic damages. One of the ways to reduce the vibrations imposed on the operators is to use appropriate materials in tractor seat cushion. The present study was carried out in order to select appropriate foam or sponge and investigate different factors in reduc...