The information explosion in today’s electronic world has created the need for information filtering techniques that help users filter out extraneous content to identify the right information they need to make important decisions. Recommender systems are one approach to this problem, based on presenting potential items of interest to a user rather than requiring the user to go looking for them....

With the digitization of society and the continuous migration of services to the electronic world, individuals have lost significant control over their data. In this paper, we consider the problem of protecting personal information subjects. More specifically, we propose a new primitive allowing a data subject to decide when, how, and by whom his data can be accessed, without the database manag...

The present paper discusses the application of a computerized feedback 1 I/ system to teacher training and the study of teacher-pupil interactive behavior in classrooms. A prototype computer assisted teaching training system (CATTS) is described in detail. Moreover, the efficacy of CATTS as a training system is empirically demonstrated. The paper specifically discusses an investigation which de...

This paper deals with performance evaluation and modelling of point-to-point communications in parallel machines with distributed memory. Existing models of point-to-point communications in contention-free networks are presented. A major drawback of these models is that they do not reeect the behavior of the network during the execution of a real parallel application. A general methodology for ...

When delegation in real world scenarios is considered, the delegator (the entity that posses the privileges) usually passes the privileges on to the delegatee (the entity that receives the privileges) in such a way that the former looses these privileges while the delegation is effective. If we think of a physical key that opens a door, the privilege being delegated by the owner of the key is o...

Evolution, as trial-and-error based learning methods, usually relies on the repeatability of an experience: Different behavioral alternatives are tested and compared with each other. But agents acting on real environments may not be able to choose which experience to live. Instead, the environment provides varying initial conditions for each trial. In competitive games for example, it is diffic...

Traditional business practice depends on trust relations between the transacting parties. One of the most important aspects of this trust is the quality of the offered services or products. The Web currently constitutes an enabler for Electronic Commerce, providing a global transaction platform that does not require physical presence. However, transferring trust from the physical world to the e...

Since the advent of graphical user interfaces, electronic information has grown exponentially, whereas the size of screen displays has stayed almost the same. Multiscale interfaces were designed to address this mismatch, allowing users to adjust the scale at which they interact with information objects. Although the technology has progressed quickly, the theory has lagged behind. Multiscale int...

OBJECTIVE We examined the impact of operational variables on diagnosis and decision-making processes, focusing on information search. BACKGROUND Arguably, the "best" decision-making processes in high-technology cockpits would be those that are both correspondent (objectively accurate) and coherent (rationally sound). In the electronic world, coherence in terms of identification and incorporat...

Thz.spaptr presemts a study of the tmpact ofreduclng the vector regtsterstze m a decoupled vector architecture. In traditional in-order vector architectures, loltqvectorr egzstersh avetypically been the norm. We start presenting data that shows that, even for highly ucctorz.~able codes, only a small, fraction ojall elements of a long vector regzster are actually used. Lfre also show that reduct...