this paper proposes a bi-objective model for the facility location problem under a congestion system. the idea of the model is motivated by applications of locating servers in bank automated teller machines (atms), communication networks, and so on. this model can be specifically considered for situations in which fixed service facilities are congested by stochastic demand within queueing frame...

this study examined the effect of the zpd-based discourse scaffolding on efl learners' co-construction of l2 metadiscourse performing collaborative writing tasks and explored the discourse scaffolding dynamics. the participants were 160 efl students that were assigned to four different treatment conditions: (i) formal teaching, (ii) input enhancement, (iii) non-zpd interaction, and (iv) zpd-bas...

the purpose of this research is to analyze differential adpositional case marking (dacm) in vafsi within ot framework by using the generalization of aissen’s (2003) differential object marking (dom) model. while bossong (1985) has traced dom in more than 300 languages, dacm has not been investigated typologically, yet. dacm, as a branch of differential case marking (dcm), questions the effect o...

iris belongs toiridaceae family and it is monocotyledon. iris is one of the important ornamental and medicinal plants. 34 iris genotypes (14 species) collected from different provinces of iran were planted at national institute of ornamental plants (niop) iran. all of the species evaluated for 15 quantitative traits and 30 qualitative traits. results showed that the highest positive correlation...

background: cyp2d6 is polymorphically expressed enzyme that show marked interindividual and interethnic variation. phenotyping of cyp2d6 provides valuable information about real-time activity of this important drug-metabolizing enzymes through the use of specific probe drugs. the aim of this study was to identify the cyp2d6 oxidation phenotype with dextromethorphan (dex) as a probe drug in maza...