The increasing amount of human-related and/or human-originated data in current systems is both an opportunity and a challenge. Nevertheless, despite relying on the processing large amounts data, most so-called smart that we have nowadays merely consider humans as sources not system beneficiaries or even active “components.” For truly systems, need to create are able understand human actions emo...

Processor performance continues to out pace memory performance by a large margin. The growing popularity of multicore and manycore architectures further exacerbates this problem. The challenge of keeping the processor(s) fed with data becomes more difficult. One approach for mitigating this gap is to employ software-based speculative prefetching. Software dynamic prefetchers are able to identif...

This paper examines how learners interact with variations in representations presented in a computer environment. In particular, it explores how analysis of learning in terms of the notion of strategic theories can provide insight into learners’ cognitive processes when using such representations. The study reported here looked at problem-solving using concurrent mathematical representations (n...

The proliferation of large High-Performance Computing clusters executing computation-intensive jobs on large data sets has made cluster power proportionality very important [13]. Despite publicly available traces showing that many clusters have a low average utilization, existing power-proportionality techniques have seen low adoption, a major reason being that these techniques require modifica...

Features extracted from electroencephalogram (EEG) recordings have proved to be unique enough between subjects for biometric applications. We show here that biometry based on these recordings offers a novel way to robustly authenticate or identify subjects. In this paper, we present a rapid and unobtrusive authentication method that only uses 2 frontal electrodes referenced to another one place...

In this paper we present an ambient audio notification system for multi-user environments. It provides unobtrusive notification by embedding audio cues in an ambient soundscape consisting of specially arranged pieces of music. The audio cues are distinct either in their instrumentation or in their rhythmic pattern and complement a musical core of the soundscape. To test the effectiveness of our...

E-commerce has become a common activity among many people. Although widely used, the interfaces which users communicate with e-commerce systems are still at an early stage of development in terms of intelligence and user-friendliness. Unobtrusiveness is recognized as one of the most important desired attributes of an intelligent and friendly interface. In this paper we describe our work on an i...