collocations are one of the areas generally considered problematic for efl learners. iranian learners of english like other efl learners face various problems in producing oral collocations.  an analysis of learners' spoken interlanguage both indicates the scope of the problem and the necessity to spend more time and energy by learners on mastering collocations. the present study specifically f...

Based on traditional constitutive relationships of Maxwell fluid flow and Cattaneo heat transfer, a modified model unsteady Marangoni convective boundary layer transfer behavior is constructed, which introduces the distributed fractional-order derivative. The governing equations corresponding initial conditions are derived, in finite difference method with L1 scheme used to solve obtained solva...

A space transportation infrastructure is described that utilizes propellant depots to support all foreseeable missions in the Earth-Moon vicinity and deep space out to Mars. The infrastructure utilizes current expendable launch vehicles such as the Delta IV Heavy, Atlas V, and Falcon 9, for all crew, cargo, and propellant launches to orbit. Propellant launches are made to a Low-Earth-Orbit (LEO...

Recently, it has been shown that a number of hydroxypyridinones such as 1,2-dimethyl-3-hydroxypyridin-4-one (L1) are useful for the treatment of iron overload in place of desferrioxamine in thalassaemic patients. In this study, the intestinal absorption (I.A.) of L1 and one of its analogues namely 2-methy-3-hydroxypyridin-4-one (L2), which possesses a higher partition coefficient (Kpart) than L...

Bilingual Education is teaching an academic subject in two languages, i.e. a mother language (first L1) and second (L2), with various amounts instructed program models. The early viewpoint about the brain tends to assert that learning L2 negatively affects L1 by dismissing it outside brain, emphasizes idea of bilingualism creates problem process. late researches on disapprove conclusions come m...

This paper focuses on a parametric difference between French and English, namely the verb movement parameter. Previous re-search shows that verb-raising in causes learnability problems for Anglophone learners. Because of raising French, an adverb may be placed its direct object, allowing subject-verb-adverb-object (S-V-Adv-O) structure. However, lack prohibits S-V-Adv-O structure English. The a...

We synthesized the luminescent ruthenium(II) polypyridyl complexes of type [Ru(bpy)2(L1)][ClO4]2 (1) (where L1 = 4,4-dicarboxy-2,2-bipyridine); [Ru(bpy)2(L2)][ClO4]2 (2); and [Ru(L2)3][ClO4]2 (3) L2 4,4-dimethanol-2,2-bipyridine). Photo-physical electrochemical properties Ru(II) were investigated along with emission vs. pH. This reveals that carboxylic acids in 2,2-bipyridine ligand had a more ...