investigations have been carried out on the indoor air pollution in .different workshops of food processing plants in iran. in order to evaluate the exposure of workers to the three most commonly used indices of air pollution ten food processing plants representing ten groups of food industry with 2.816 workers were selected. air borne contamination of different origins such cotton seed. barley...

This paper presents an air bearing stage that uses flexure for yaw motion compensation. The proposed realizes in three degrees of freedom (DOF), which are the X, Y, and Θz directions. To work with as rotational stage, we applied a consisting four bar linkages. from previous study is to compensate error has limitation increasing structural stiffness due stiffness. In this study, propose combinat...

A Pareto optimization study was carried out on a flat pad aerostatic bearing design. Some of the Pareto optimal configurations were then subjected to surface profiling errors including tilt, concavity, convexity and waviness and key performance parameters such as load capacity, stiffness and flow rate determined. From these studies it was concluded that multi-orifice aerostatic flat pad bearing...

A fundamentally precise and simple linear motion axis design is discussed where the attractive force from the linear motor is used to preload a carriage supported by six rigidly attached porous carbon air bearings. The air bearings are assembled by vacuuming the pads to two orthogonal planes, positioning the carriage above the pads, and then injecting epoxy between the bearings and the carriage...

In this study the optimization is illustrated by maximizing the load-carrying capacity of a slider bearing represented by a thermohydrodynamic lubrication model. An efficient optimization scheme, DIviding RECTangles (DIRECT), is coded for parallel computing in a single-system image cluster. The main focus of this study was to examine the performance of the standard DIRECT algorithm in coarse-gr...