The Photoexcited carrier lifetime (τ) and peak to valley transmission difference (ΔTp-v) in direct and indirect band gap crystals has been investigated by the use of single beam open and closed aperture z-scan technique using frequency doubled Nd:YAG laser. The peak to valley transmission difference (ΔTp-v) is found to be of the order of 10-2 in case of direct band gap crystals and of the order...

To communicate appropriately with native speakers to maintain communicative tasks like ordering food or refusing do a favor without any misunderstandings, learners need acquire the sociocultural features of target language (TL) pragmatic units speech acts. One source input providing these TL is coursebooks they use in classrooms. This study’s goal was explore strategy types and authenticity act...

Introduction ABO hemolytic disease of the newborn is most common cause of neonatal jaundice; previous studies have shown a poor correlation between serologic tests and clinical course in affected infants. The aim of this study was to identify the value of direct and indirect Coombs’ immunohematological tests, to identify the incidence of hemolytic disease in newborns (ABO-HDN). Methods : This  ...

this study aims to examine how iranian efl learners perceive and apply mitigation devices in request speech act in 4 asymmetrical situations. role-play interactions and questionnaires were used to elicit the required data from iranian informants (male vs. female). the results obtained from the analysis of data revealed that in identical situations, male requestors were comparably more certain t...

Several procedures have been employed to examine the impacts of subsidies on different indices in an economy. This paper proposes a new approach enabling one to compare direct and indirect payments on households. To this end, the impact of government payments is examined on Gross Regional Products, Employment, Income Distribution and Inflation of Golestan Province in Iran through a Social Accou...