hondrosarcoma of head and neck is a very rare tumor. Ïn this article a single case referred to Ë.N.T. department of Rasoul-e-Âkram hospital is being reported. Ân extensive tumor which involved nasal, posterior ethmoidal sinuses, sphenoid and intracranial regions which could cause a difficulty in its treatment. Delay in consultation and diagnosis could be the reasons for massive extentio...

the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...

this study attempts to investigate the effect of peers’ revision in comparison to that of the teacher, and whether peers’ comments and teachers’ comments facilitate students’ revision? if yes, which one is more effective? also attempts have been made to see which aspects of language are more highlighted by peers versus teachers when commenting. besides, it is investigating the student’s attitud...

this study investigated the effects of manipulating the cognitive complexity of tasks along +/- few elements and the time limits on l2 learners writing performance. to conduct the study, 60 iranian efl learners with two levels of proficiency, low and high intermediate, were selected and assigned to three groups based on the time devoted to task completion. the participants performed both a simp...

the present study aimed at investigating how different news agencies using the concept of legitimation/delegitimation represent the same event differently. to this end, van leeuwens (2008) legitimatory/delegitimatory framework was applied to the data gleaned from the iranian state-run news agency fars news, british state-run news agency bbc, and also american state-run news agency voa. the resu...

    Introduction: Cystic hydatid disease(cystic echinococcosis) is a zoonotic infection of humans caused by the larval stage of the tapeworm Echinococcus Granulosus. Most of the human infections are caused by eating the materials infected with dog’s feces. The oval form would penetrate into the bowels and reach the liver, lung and other organs through the portal vein. Then, there, it would turn...

the quest for power has formed much of the world history especially in 20th and 21st centuries. oil (energy) particularly after industrial revolution has been a tool for conquest and power and has been transformed to a geopolitical issue. from a geopolitical point of view this has been the case for the last two centuries in central asia and caucasus. central asia and caucasus has always been...