Zoran Constantinescu

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This paper overviews some aspects of using different levels of accuracy and complexity for the visualization of large data sets. Current status of the volume of data sets that can be generated is presented, together with some of the inherent problems due to such large data volumes, visualization requirements, and display limitations of existing hardware(More)
New technological developments have made it possible to interact with computer systems and applications anywhere and anytime. It is vital that these applications are able to adapt to the user, as a person, and to its current situation, whatever that is. Therefore, the premises for evolution towards a learning society and a knowledge economy are present.(More)
In spite of the scale, popularity, and importance of the open courseware movement for users worldwide, there is yet no quality assessment framework that could support users on their quest for finding the most appropriate learning resource with regard to their educational needs. This paper presents both an evaluation and a comparison between three open(More)
In this paper we first present briefly QADPZ, an open source platform for heterogeneous desktop grid computing, which enables users from a local network (organization-wide) or Internet (volunteer computing) to share their resources. Users of the system can submit compute-intensive applications to the system, which are then automatically scheduled for(More)
Technological progress has made it possible to interact with computer systems and applications anywhere and any time. It is crucial that these applications are able to adapt to the user, as a person, and to its current situation, whatever that is. Contextual information and a mechanism to reason about it have demonstrated an important potential to provide(More)