in order to evaluate competition among some weed species and canola, a field experiment in astan ghods razavi's field in mashhad was done on 2007-2008. thirty 50×50 cm quadrates were used in two times (stem and flower production) to measure the canola dry weight, leaf area index and canola and weeds density with destruction and thirty similar quadrates were used for counting weed species a...

Introduction The business value research, after the initial findings of missing impact of IT systems, has focused on alternate mechanisms that affect performance of IT systems (Loveman 1994, Barua and Mukhopadhayay 2000, Brynjoffsson and Hitt 1996). Amongst the various processes that affect the value realization of IT, a critical factor is related to the complementary processes and mechanisms t...

In 7 experiments, undergraduates judged the force exerted by a videotaped standing puller, a computer-generated (stick-figure) puller, or a computer-generated inverted pendulum. Single and stepwise multiple regression analyses determined the kinematic variables exploited by the participants. Results show that (a) judgments correlated highly with force and improved with feedback; (b) judgments c...

recent experiment was performed in order to determine effects of dietary l-threonine supplementation levels in japanese quails’ diets on performance, reproductive and internal organs and feathers growth. one hundred and forty four, 1-d old japanese quails, have been selected and randomly distributed between six treatments and four replicates. basal experimental ration was based on wheat, withou...

Relative spacings are relative differences between order statistics. In this context, we extend previous results concerning the increasing convex of two distributions from case consecutive to general spacings. The sufficient conditions given in terms expected proportional shortfall order. As an application, compare deprivation within some parametric families income distributions.