abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...

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...

the present paper deals with criminal issues. for example, legal injunction on the necessity of returning a deposit has a legal nature and legal injunction on the punishment of those who breach the trust has a criminal nature. existing social issues are the basis of classification of some instances into the issue, some of which are based on variation and others on quality. therefore, the motiva...

just as motivation is important in sla research, demotivation constitutes an important factor, too. there are many studies done on demotivation and burnout of teachers. many of these studies have been conducted on one or two aspects of english instruction. consequently, there are few studies which have been done on more than two aspects of english teaching. the aim of this study is to find out ...

Al-Akawayni is considered one of the greatest and most reputable Iranian physicians of the fourth century AH whose medical works and expertise have been reliable and acceptable sources in most periods of the history of medicine. Unfortunately, old books do not reveal much about his life and works, and what we know about him is based on his own statements and evidence and inferences we have made...

SAVEH JAME mosque was erected in different periods like Isfahan's and Ardestan's Jame. Consideration of these constructions provides a lot of information about Iranian architecture evolution. Therefore, scholars analyze and separate the historical and physical periods in these buildings to understand Iranian architecture and the process of conversions correctly, based on historical method. Main...

Ignaz Goldziher, a famous western orientalist, believes that Muslims' approach to criticize narrations is mostly limited to the critique of the chain of transmission (isnad). In addition, he argues that judgment about the content of narrations depends on the validity of the chain of transmission. After Goldziher, some orientalists have mentioned similar results and confirmed his views. Criticiz...

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

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...