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...

death disease is condition of a person who will die of a disease. jurisprudents have been disagreed regarding influence of this condition on his certainties. some of the jurisprudents have regarded certainties as testament, but some of other jurisprudents have not believed in this limitations and considered person's freedom at the time of his/her sickness like his/her freedom at the time o...

mohammed moftahh rajab al-fituri is a major african poet with such an unprecedented sphere of knowledge and artifice who has praised revolutions and immortalized the free spirit of heroism in africa and the arab world. alfiturihas composed odes on many causes covering lebanon, palestine, and iraq wherein he calls upon nations to struggle for their freedom and to fight submission and slavery. al...