the matter of meaning in place, is one of the main qualities of human life. people consciously or unconsciously looking for meanings in places. the importance of finding the meaning of place is that, understanding the meaning will lead to “act” in place. finding the place friendly, or finding it insecure will lead to act differently. now the question is that, is the meaning of place, something ...

A pervasive problem for engineering change management is the phenomenon of change propagation by which a change to one part or element of a design requires additional changes throughout the product. This paper introduces a multilayer network model integrating three coupled layers, or domains, of product development that contribute to change propagation: namely, the product layer, change layer, ...

using the mixed solvents, (water +ethanol + propanol), the solubility of cdf2 was determined byevaporating method at 25° c. the results showed that the sollbility, s, of cdf2 decreases bydecreasing the dielectric constant of the mixed solvent .once the solubility of cdf2 was determined,the concentration solubility product, ksp(c)=4s3, was calculated .furthermore ,by estimating the meanactivity ...

The converter transformer is the core equipment of HVDC transmission system, valve-side winding which needs to withstand DC voltage. Partial discharge one main threats safe operation transformer, yet characteristics partial development oil-pressboard insulations under constant voltage are insufficiently understood. In order better understand insulation and provide deeper theoretical support for...