GRACE spherical harmonics are well-adapted for representation of hydrological signals in river drainage basins large size such as the Amazon or Mississippi basins. However, when one needs to study smaller basins, comes up against low spatial resolution solutions harmonics. To overcome this limitation, we propose a new approach based on Slepian functions which can reduce energy loss by integrati...

In this paper, we introduce the notion of sesquilinear map on Β(H) . Based on this notion, we define the quadratic map, which is the generalization of positive linear map. With the help of this concept, we prove several well-known equality and inequality...  

the goal of this study was to investigate the effect of using computer conceptual maps­, compared with  usual way of drawing them by pencil and paper­, in increasing learning, recalling and educational progress motivation in geology course among high school students. the study was conducted in semi experimental method in which students of 3 classes were classified in 3 groups. (group 1: common ...

in this paper, we give a characterization of strongly jordan zero-product preserving maps on normed algebras as a generalization of  jordan zero-product preserving maps. in this direction, we give some illustrative examples to show that the notions of strongly zero-product preserving maps and strongly jordan zero-product preserving maps are completely different. also, we prove that the direct p...