an artificial neural network has been used to determine the volume flux and rejections of ca2+ , na+ and cl¯, as a function of transmembrane pressure and concentrations of ca2+, polyethyleneimine, and polyacrylic acid in water softening by nanofiltration process in presence of polyelectrolytes. the feed-forward multi-layer perceptron artificial neural network including an eight-neuron hidden la...

An efficient and environmental-friendly synthetic route to 1,8-dioxodecahydroacridines derivatives have been developed via multi-component one-pot Hantzsch reaction of various aldehydes and ammonium acetate with 2 equivalents dimedone in the presence of Phosphorus pentoxide supported on aluminaas catalyst under solvent-free conditions. The present approach offersseveral advantages such as s...

An efficient and environmental-friendly synthetic route to 1,8-dioxodecahydroacridines derivatives have been developed via multi-component one-pot Hantzsch reaction of various aldehydes and ammonium acetate with 2 equivalents dimedone in the presence of Phosphorus pentoxide supported on aluminaas catalyst under solvent-free conditions. The present approach offersseveral advantages such as s...

This document describes how the Sieve email filtering language, along with some extensions, can be used to create automatic replies to incoming electronic mail messages based on the address book and presence information of the recipient.

We studied how actual users find items of interest in today’s complex, recommender-rich information environments, what role recommenders play in it, and if recommenders increase perceived social presence. We used applied ethnography, on-location observation and interviewing, and Amazon as the environment to get an accurate picture of user activity. We found that users are increasingly relying o...

More and more companies allow users to bring their own IT devices to the workplace. As a result, an increased heterogeneity of hardand software makes it challenging to deliver central IT support. Therefore, employees might increasingly rely on the help of their colleagues. In such a user-to-user support scenario, traditional communication media such as text chat and telephone are used. In this ...

Companies seeking to achieve significant benefits through e-business need to create an effective and usable web presence to ensure successful interaction and communication with their employee, partners and customers. Despite the wealth of information available on web ease-of-use or usability, there is no standard, allencompassing framework defining web site effectiveness. Hence it is difficult ...

This paper contributes to the growing body of knowledge which identifies benefits for Blended Learning in the understanding of social processes role. It reports on an exploratory study into the role of social presence in blended learning environment. Employing a qualitative methodology, the study sought to understand social presence of learners in Blended Learning environment. The paper present...

A water-accelerated multi-component synthesis of organic target molecules was used as a key method for the preparation of cyclopentadiene derivatives. The three-component condensation reactions of primary amines with alkyl propiolates in the presence of N-methylimidazole in water at room temperature were developed as efficient and clean green synthetic procedures for the high-yielding preparati...