abstract: the gap between supplied services and people’s expectations is a fundamental problem upon the connection between municipality and citizens. the main objective of this research is to survey the synchronization measure of supplied services by mashhad’s municipality toward mashhad citizens’ expectations. descriptive and analytical methods are implemented in this research. chosen sa...

air spindles are one of the main elements of precise machine tools. vibration of these spindles is one of the vital issues necessary for investigation. among parameters which influence air spindle vibrations are rotational speed, compression air method, input nozzle diameter, air gap pressure. in this study using ansys, the effects of air gap thickness on air spindle vibrations have been invest...