this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...

muhammad ibn muhammad ibn numan, known as "shaykh mufid," one of the great imamiye theologians and jurists in the fourth and early fifth century , had comprehensive mastery of both rational and traditional topics and exerted his influence upon both his contemporary and future scholors. he is considered to be one of the top imamiye scholars who spent his lifetime teaching, learning and authorin...

abstract the variables affecting the nature of reading comprehension can be classified into two general categories: reader’s variables, and text variables (alderson, 2000). despite the wave of research on vocabulary knowledge as reader’s variable, the role of this knowledge in c-test as a text-dependent test and its interaction with lexical cohesion of the test as a text feature has remained a...

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

abstract english language learning in iran has become significant in recent years, and english has been included in the curriculum of iranian schools and universities, and considerable attention has been paid to this language in our society. nevertheless, teaching and learning english in iranian schools has not been able to satisfy the specified goals, so different efl institutes have been est...

abstract: the potato tuberworm, phthorimaea operculella (zeller), is an important insect pest of potato (solanum tuberosum l.) in the storage and field in most parts of the world especially in tropical and subtropical regions due to its close relationship with the host, high reproductive potential and high economic losses. information on host preference, life table parameters and digestive en...

به منظور تعیین مناسب‌ترین شاخص انتخاب مقاومت به خشکی در بیست ژنوتیپ نخود زراعی آزمایشی در سال‌های زراعی 86-1385 و 1387-1386در مزرعه تحقیقاتی موسسه تحقیقات دیم سرارود کرمانشاه  و دانشگاه آزاد اسلامی واحد کرمانشاه در شرایط جداگانه آبی و دیم با یک آزمایش مرکب در قالب طرح بلوک‌های کامل تصادفی در چهار تکرار انجام شد. در این بررسی ژنوتیپ تازه معرفی شده مورد استفاده قرار گرفت. شاخص‌های کمی مقاومت و حس...

به منظور تعیین مناسب ترین شاخص انتخاب مقاومت به خشکی در بیست ژنوتیپ نخود زراعی آزمایشی در سال های زراعی 86-1385 و 1387-1386در مزرعه تحقیقاتی موسسه تحقیقات دیم سرارود کرمانشاه  و دانشگاه آزاد اسلامی واحد کرمانشاه در شرایط جداگانه آبی و دیم با یک آزمایش مرکب در قالب طرح بلوک های کامل تصادفی در چهار تکرار انجام شد. در این بررسی ژنوتیپ تازه معرفی شده مورد استفاده قرار گرفت. شاخص های کمی مقاومت و حس...