We extend the McPherson model for Si-O bond-breakage energetics, which considers only a single SiO4 tetrahedron, in a way to capture the effect of the whole crystal. No ledge in the direction assumed in the McPherson model was revealed. Instead, potential profiles feature a saddle point in a different direction. The activation energy for bond-breakage is found to be rather high (~ 6 eV). This s...

Sites attributed to the Wichita abound in southern Kansas and occur as clusters of large village sites in Cowley, Marion, McPherson, and Rice counties and to a lesser degree elsewhere in the state. The relationship of the sites in McPherson and Rice counties, separated by no more than 30 miles, are of particular interest because these have ample evidence of early contact with Europeans and prob...

PURPOSE Agglomeration in suspension is a size enlargement method that facilitates operation of solid processing and preserves the solubilization properties of fine particles. A small quantity of binder liquid is added into a suspension of microparticles, directly in the stirred vessel where the precipitation or crystallization took place. This study deals with the evaluation of the effect of ag...

The suspension system of a vehicle is one of the most important parts which is involved in the process of vehicle designing. When a vehicle suspension system is designed, the evaluation of its performance against the road disturbances such as shocks and bumps are very important. The most commonly used systems consist of four hydraulic Jacks with mobility in vertical line with low speed and l...

this paper presents the results of a recent project of ikco’s research center to modify paykan 1600’s rear suspension mechanism with the purpose of improving comfort, stability and handling qualities. the car was originally equipped with a solid rear axle with leaf springs. by replacing the original mechanism with a three-link mechanism with panhard bar and coil springs, the ride comfort and ha...

Micro6s are the sequel to the Micro5 series, newly projected rover prototypes. Micro6 is equipped with a suspension mechanism so called HEXUS, a six wheeled mobility system with actively controllable suspension. Thanks to the new link mechanism, HEXUS has not only good performance as well as PEGASUS, but also has great stability and fault tolerant feature. The paper describes the concept and sy...