George Vellis

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The paper motivates and presents an approach for assembling innovative information-based products and services by virtual cross-organization communities of practice. Using a case study on assembling vacation packages, we describe the cross-organizational virtual partnership, the mechanics allowing it to operate as a virtual community of practice and how(More)
The paper reports on the design of a prototype system to facilitate intertwining of on-line and off-line practices during collaborative networked music master classes. Our approach links with recent theoretical thinking inspired from the concept of communities of practice and aims to devise a system to provide a virtual 'place' for engaging in the practice(More)
The paper describes an engineering method for building user interfaces for ubiquitous environments. The method comprises of several extensions in the UsiXML family of modes as well as design and runtime support so as to enable multi-platform, synchronous and collaborative interactions. We demonstrate key concepts of the method and their application by(More)
The paper describes an engineering approach for building user interfaces for synchronous peer co-engagement in virtual work by operating with, on, through and within different digital representations. The proposed approach introduces several extensions to the UsiXML family of models as well as design and runtime support for multi-platform, synchronous and(More)
The present research reports on the extension of model-based UI engineering to support (design and run-time) multi-device synchronous collaborative interactions. We detail the new models devised and the tactics devoted to handling semantic, syntactic and lexical variation during synchronous collaborative team work. We showcase our current development effort(More)
This paper is inspired by the concept of digital metamaterials and advances a proposal for a genre of digital artifacts that exhibit the transformative capacity to transcend technical boundaries in digital ecosystems. In terms of theoretical footing, our approach is ground on the conception of 'software as material' with intrinsic properties such as(More)