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     The Armey curve demonstrates a non linear relationship between government size and economic growth. This study used threshold regression approach in order to test the Armey curve relationship between government size and economic growth in Iran. Two sector production function proposed by Rati Ram (1986) and three indices of government size are used in this paper. The results reveal that a non linear relationship between all indices of government size and economic growth does not exist in Iran.

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Mounted point grinding is a machining method to reduce surface roughness and improve surface finishing on workpiece walls and hard-to-reach areas. This process is usually used without preparing the grinding wheel before and during the grinding operation, which reduces the proper performance of the process. Environmental contamination, surface integrity, coolant-lubricant-related diseases that affect workers' health, and machining costs heavily depend on the appropriate dressing and proper coolant-lubricant usage. In this study, as a novel approach, the effects of dressing conditions (depth of dressing and dressing feed rate) and the feed rate of the workpiece during the grinding of a hardened Mo40 steel workpiece in two traditional cooling-lubricant minimum lubrication environments have been investigated. Surface roughness and wheel loading are two significant outputs in every grinding operation. The experimental result of this study reveals an improvement in enhancing the surface roughness in a soft dressing. Moreover, another aim of this study was to achieve proper surface roughness by implementing minimum quantity lubrication to significantly reduce total cutting fluid usage compared to traditional continuous coolant-lubricant. In this study, higher wheel loading in the Minimum Quantity Lubrication (M.Q.L.) technique was observed compared to the traditional continuous coolant-lubricant technique.