The purpose of this study was to examine the relationships of the students’ perceived levels of collaborative learning, social presence and overall satisfaction in a blended learning environment. This research studied the relationship of these three variables and identified critical factors related to them. The participants were 48 graduate students who took a blended-format course in health ed...

This paper deals with leader-following and leaderless consensus problems of high-order multi-input/multi-output (MIMO) multi-agent systems with unknown nonlinear dynamics in the presence of uncertain external disturbances. The agents may have different dynamics and communicate together under a directed graph. A distributed adaptive method is designed for both cases. The structures of the contro...

This paper focuses on an extensive market analysis done under the framework of the Peach coordination action, a project funded by the European Union Future Emerging Technologies unit. The analysis identifies, classifies, reports and further elaborates on which areas presently benefit from Presence technologies. Taxonomy of these markets is also derived in this document, describing how and why P...

Presence has become a key concept in characterizing and evaluating Virtual Environments. Our contribution is to show that current measures of Presence, as a metric of users’ experience of Virtual Environments, are highly problematic: results from the literature cannot be repeated and it lacks a theoretical basis. We synthesize results from three experiments we conducted and in conclusion point ...

the efficient and environmentally friendly method for the one-pot synthesis of polyhydroquinolines has been developed in the presence of cuo nanoparticles. the multi-component reactions of aldehydes, dimedone, ethyl acetoacetate andammonium acetate were carried out under solvent-free conditions to afford some polyhydroquinoline derivatives. this method provides several advantages including high...

A novel, convenient and efficient multi-component reaction for synthesis of phosphonate derivatives from activated acetylenic compounds with 2-hydroxyacetophenone in the presence of phosphites in water lead to the formation of phosphonates in good yields.