Winding/unwinding system control is a very important issue to web handling machines. In this paper, a novel adaptive H∞ control strategy is developed for winding process control. A gain scheduling scheme is proposed based on a neural fuzzy approximator to improve the transient response and enhance tension control; the controller’s convergence and adaptive capability can be further improved by a...

Consumer studies demonstrate that online users value personalized content. At the same time, providing personalization on websites seems quite profitable for web vendors. This win-win situation is however marred by privacy concerns since personalizing people's interaction entails gathering considerable amounts of data about them. As numerous recent surveys have consistently demonstrated, comput...

Conjunctive Boolean queries are a fundamental operation in web search engines. These queries can be reduced to the problem of intersecting ordered sets of integers, where each set represents the documents containing one of the query terms. But there is tension between the desire to store the lists effectively, in a compressed form, and the desire to carry out intersection operations efficiently...

Concept learning belongs to the fundamental challenges of educational technology. Contrary to the current trend of designing and implementing contents for various web–based virtual courses, concept learning requires cognitive tools rather than digital materials. We introduce a novel scheme to generate computer games from concept maps made by a teacher or a learner herself. Concept gaming exceed...

Objective: Young’s schema theory provides a theoretical basis that relates coping styles to early maladaptive schemas. This research aimed to identify maladaptive coping strategies including avoidance and over compensation strategies associated with migraine and tension headaches.  Methods: The present research was of cross sectional and correlational study type. The measures incl...

In this paper the density and temperature dependencies of surface tension are investigated. Using the Lennard-Jones (12,6), as an effective pair interaction potential, a linear expression is derived for isotherms of g /r2  versus r2 for some normal and ChloroFluoroCarbons (CFCs)</...

The present investigation entails a procedure by which the surface tension and viscosity of liquids could be redicted.To this end, capillary experiments were performed for porous media by utilizing fifteen different liquids and powders. The time of capillary rise to a certain known height of each liquid in a particular powder was recorded. Two artificial neural networks (ANNs) were...

web 2.0 is not a single technology or standard but rather a set of concepts and features. web 2.0 concepts and features call for further attention. since, previous studies have only addressed only some of these concepts and features. in order to give a comprehensive view of web 2.0, these features are collected through literature review and a framework of web 2.0 features is presented. also, du...

this study was aimed at determining intra and inter-observer concordance rates in the gleason scoring of prostatic adenocarcinoma, before and after a web-based educational course. in this self-controlled study, 150 tissue samples of prostatic adenocarcinoma are re-examined to be scored according to the gleason scoring system. then all pathologists attend a free web-based course. afterwards, the...