objectives: this study sought to assess the level of stress in general dentists in the 2nd district of tehran city in 2014 to find out the stressors and suggest strategies to overcome them. methods: this descriptive, analytical, cross-sectional study was conducted on 130 general dentists from the 2nd district of tehran city selected via weighted randomization. level of stress was assessed using...

An axisymmetric hot closed die-forging process has been studied by physical modeling technique using the plasticine. To observe the material flow pattern, layers of plasticine with different colors were used. The normal direction to the layers was considered a principal direction. The strain distribution was obtained by measuring the thickness of the plasticine layers. Based on the strain distr...

stress and residual stress are the main problems in the operating performance of materials. they are the principal causes of material failure and can affect life time of component. however measurement or predictions of them are typically difficult. two common non-destructive methods, x-ray diffraction and ultrasound are not reliable methods for subsurface residual stress measurements and destru...

In recent years, a local, or even grammatical analysis of implicatures has gained popularity in pragmatics, especially to account for implicatures triggered by disjunctions embedded under other operators. Against this trend, in this paper a more traditional—and perhaps more Gricean—global analysis of implicatures is defended. Crucial use is made of facts, which provide a more fine-grained notio...

In laboratory testing, the liquefaction resistance of sands is typically evaluated using cyclic triaxial and simple shear tests. These tests cannot be used in a rigorous manner to systematically assess effects principal stress rotation intermediate changes on undrained response sands. this study, effect these two factors Ottawa sand was investigated hollow cylinder apparatus. At similar initial...