Results on prime near-ring with (σ,τ)-derivation

Let N be a prime left near-ring with multiplicative centerZ; and D be a (&#945;, &#947;)derivation such that &#948;D = D&#948; and &#915;D = D&#915;(i)If D(N)&#8834; Z; or [D(N);D(N)] = 0 or [D(N);D(N)]&#963;, &#947;= 0; then (N; +)is abelian. (ii) If N is 2-torsion free, d1 is a (&#945;, &#947;)-derivation and d2 is a derivation on N such that d1d2(N) = 0, then d1 = 0 or d2 = 0.</p

A Partial Least Squares Path Model of Repurchase Intention of Supermarket Customers

AbstractThe objective of this paper is to model which aims to describe the extent to which customer intention to repurchase a service is influenced by customer perceptions of service quality, customer perceptions of product quality, comparative price perceptions, discount perceptions, trust, value, and customer satisfaction were considered as the major factors in the marketing literature. Partial Least Squares (PLS) Path Model approach was used to build a repurchase intention model in Turkish retailing sector wi th the theoretically hypothesized relationships among these major factors collecting the data from 1530 supermarket customers purchasing 102 different supermarkets

Around the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar II: Results for the second observing season

We report on an observing campaign in March 2001 to monitor the brightness of the later arriving Q0957+561 B image in order to compare with the previously published brightness observations of the (first arriving) A image. The 12 participating observatories provided 3543 image frames which we have analyzed for brightness fluctuations. From our classical methods for time delay determination, we find a 417.09 +/- 0.07 day time delay which should be free of effects due to incomplete sampling. During the campaign period, the quasar brightness was relatively constant and only small fluctuations were found; we compare the structure function for the new data with structure function estimates for the 1995--6 epoch, and show that the structure function is statistically non-stationary. We also examine the data for any evidence of correlated fluctuations at zero lag. We discuss the limits to our ability to measure the cosmological time delay if the quasar's emitting surface is time resolved, as seems likely.Comment: AAS LaTeX, 5 PostScript figure