in this paper the effects of non-linearity of suspension on dynamic behavior of a railway wheelset has been studied. this wheelset has four degrees of freedom that with two constraints it has reduced to two degrees of freedom. vermeulen-johnson theory has been used to calculate contact forces between wheel and rail. in this study the creep coefficients have considered constant. any linearizatio...

objectives: goal-directed subsidies because of its nature can affect all aspects of iranian life. this scheme is not only an economic program but also affects other aspects of social life including: welfare and economic situation of society, labor market, income, expenditure and consumption pattern models of family and social problems such as poverty and inequality, drug abuse, family problem, ...

acanthophyllum laxiusculum is one of the most widely distributed species of the genus in iran that flourishes in steppe and mountainous regions of the country. in the present study, water-soluble content of a. laxiusculum roots was extracted by boiling water and further successively purified partially by a defined solvent system. surface tension measurements revealed the ability of plant extrac...

kiarostami’s unfinished cinema emphasizes the importance of audiences’ involvement in a movie by using postmodern images. some essential points of critically reading his, so-called half-created cinema, could be summarized as self-reflexive style, diagrammatical perspectives, in-between narratives,and individual minimalism. the main postmodern achievement of this cinema is focusing on the proces...

this paper is devoted to the spectral theory (more precisely, tothe variational theory of the spectrum) of guided waves in anelastic half cylinder.  we use variational methods to investigateseveral aspects of propagating waves, including localization (seefigure 1), existence criteria and the formulas to find them. weapproach the problem using two complementary methods: thevariational methods fo...

conclusions although some studies showed association between anemia and extubation failure, the current study could not confirm it. the study showed that males, regardless of the hct level, had a better extubation success rate than those of females. results there was no significant association between the level of hct concentration and extubation failure (8.9% vs. 9.2%, p = 0.507). gender and a...

teleworking as an innovative way has many benefits in governmental, organizational and individual levels, but it faced with different variables in plan and implementation which is caused to low acceptance rate in organizations. by identifying and controlling these variables, managers and decision-makers can use teleworking programs in their organizations. the aim of this study is to investigate...

this paper is devoted to the spectral theory (more precisely, tothe variational theory of the spectrum) of guided waves in anelastic half cylinder.  we use variational methods to investigateseveral aspects of propagating waves, including localization (seefigure 1), existence criteria and the formulas to find them. weapproach the problem using two complementary methods: thevariational methods fo...

since the publication of anscombe’s famous paper “modern moral philosophy” (1958), virtue ethics has become a matter of discussion among scholars. at least four charges have been raised against virtue ethics, one of which is the charge of promoting undue enthusiasm regarding the moral fitness of human beings. this article explores the limits of virtue ethics with regard to the frailty of human ...