this investigation postulatesvygotsky’s (1978) concept of zone of proximal development (zpd) and his related “scaffolding” metaphor as well as norton’s (2006) principles of sociocultural identity as its theoretical foundation.thisresearchintends to scrutinizethe socioculturally-oriented mediationalmechanisms utilized in student-student and student-teacher collaborationsin an iranian efl writing...

identity orientations refer to the relative importance that individuals place on various identity attributes or characteristics such as race, religion, culture and language when constructing their self-definitions (chew, 2007; cheek, 1989). accordingly, the present study aims at identifying the impact of identity aspects on the iranian learners' english language achievements at shiraz universit...

Internet attacks often use IP spoofing to forge the source IP address of packets, and thereby hide the identity of the source. It causes many serious security problems such as the difficulty of packet authenticity and IP traceback. While many IP spoofing prevention techniques have been proposed apart from ingress filtering, none have achieved widespread real-world use. One main reason is the la...

Tirapazamine is a bioreductively activated DNA-damaging agent that selectively kills the hypoxic cells found in solid tumors. This compound shows clinical promise and is currently being examined in a variety of clinical trials, including several phase III studies. It is well established that DNA is an important cellular target for tirapazamine; however, the structural nature of the DNA damage i...

Nucleotides in tRNAs that are conserved among isoacceptors are typically considered as candidates for tRNA synthetase recognition, with less importance attached to non-conserved nucleotides. Although the anticodon is an important contributor to the identity of methionine tRNAs, the class I methionine tRNA synthetase aminoacylates microhelices with high specificity. The microhelix substrates are...

On the first interpretation, identify is the morphosyntactic base of the derived word identifiable: this statement is justified by the fact that a morphosyntactic property of identify the fact that it is a verb is a prerequisite for the affixation of -able. On a second interpretation, identify is the semantic base of identifiable: the semantics of the -able form are a function of those of the v...

the present study was aimed at examining concerns about the social effects of efl learning, a challenging area of research which has not been discussed sufficiently. it tried to investigate the relationship between efl learning and national identity. in addition, attempt was made to find a relationship between language motivation types and national identity. furthermore, the role of two demogra...

About 130 kb of sequence information was obtained from the coliphage JS98 isolated from the stool of a pediatric diarrhea patient in Bangladesh. The DNA shared up to 81% base pair identity with phage T4. The most conserved regions between JS98 and T4 were the structural genes, but their degree of conservation was not uniform. The head genes showed the highest sequence conservation, followed by ...