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III-V semiconductors and their alloys are by no meanssimple and have some rather subtle properties There fore their increasing commercial exploitation has stimulated phenomenal growth in the research effort devoted to studying their defects and radiation effects. NMR spectroscopy has become...

Numerical anxiety was investigated in the light of poor mathematics achievement and negative attitudes held by learners towards mathematics. Two instruments, a two dimensional scale measuring general anxiety and numerical anxiety, and a mathematics achievement test comprising items specific to a...

_ Let * be a root system in a £-dimensional real Euclidean space V with Weyl group W( £), and let W+{<f) denote its rotation subgroup. In [173 » the projective representations of the rotation subgroup W ( 9) have been determined from those of W( $) for each root system $. This is done by...

Saeed [11] has considered Schur multipliers of some of the finite abelian groups.The study of the schur multipliers of abelian groups is the first step in the studying of the projective representations of such groups. Our objective here is to determine the Inequivalent Irreducible projective...

Saeed [11] has considered Schur multipliers of some of the finite abelian groups.The study of the schur multipliers of abelian groups is the first step in the studying of the projective representations of such groups. Our objective here is to determine the Inequivalent Irreducible projective...

Bulk Hetero-Junction - (BHJ) - Organic photovoltaic (OPV) cells based on the conjugated polymer poly (3-hexylthiophene-2, 5- diyl) (region-P3HT) also referred to as P3HT and a fullerene derivative [6, 6] Phenyl-C61-butyric acid methyl ester (C60-PCBM) also referred to as PCBM. The optimization,...

A high absorptance (>0.90) is an essential factor in the efficient use of a .solar collector. However, equally important is the need to keep the emittance as low as possible (<0.20). Both the.absoptance and emittance depend on the optical properties of the coating and the substrate. The solar...

One's perception and attitude towards Mathematics affects their conception of how it should be learned and presented (Ernest, 1998). This study was a survey of high school pupils' perceptions and attitudes towards Mathematics in the Copperbelt Province of Zambia. Pupils' perceptions and attitudes...