a major concern in the last few years has been the fact that the cultural centers are keeping distance with what they have been established for and instead of reproducing the hegemony, they have turned into a place for resistance and reproduction of resistance against hegemony. because the cultural centers, as urban public spaces in the last two decades, have been the subject of ideological dis...

More than half a century has passed since the onset of successful life-saving and at times astonishing transplantations of organs from brain dead donors, numerous books and articles have been written on the subject, and local, regional and international meetings and conferences have been held. Nevertheless, no consensus has yet been reached among scholars of various fields such as medical scien...

فرض کنیم ‎$rhspace{1mm}$‎ حلقه ای جابجایی، یکدار، نوتری و ‎$i$‎ و ‎$j$‎ ایده آل هایی از آن باشند. هم چنین فرض کنیم ‎$m$‎ یک ‎$r$-‎مدول و ‎$t$‎ عدد صحیح نامنفی باشد. ابتدا ثابت کرده ایم که اگر ‎$mathrm{ext}^t_r(r/i,m)$‎ یک ‎$r$-‎مدول متناهی و ‎${h}^t_i(m)$‎ یک ‎$r$-‎مدول مینی ماکس و برای هر ‎$i<t$‎، ‎${h}^i_i(m)$‎ مدول های ‎$i$-‎هم متناهی باشند، آنگاه ‎${h}^t_i(m)$‎ یک ‎$r$-‎مدول ‎$i$-‎هم مت...

charles dickens was a voracious reader even in his childhood. his early reading of seventeenth- and eighteenth-century picaresque fiction greatly influenced his writing style. his first novel, the pickwick papers, is a tale of rogues and swindlers, adventures and quests, satire and comedy, and innocence and experience. oliver twist, dickens’ second novel, is a young boy’s progress through a cor...

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...