OpenCL standard reaches more wider audience due to increasing the number of devices supporting it. This situation puts developers who want performance on large range of platforms in a difficult position. To solve this problem, autotuning frameworks are deployed. But the problem of design exploration space is seriously large because of OpenCL parameters. In this work, we introduce an approach wh...

Autotuning methods are typically conceived as procedures, thus need simulating as digital blocks. However, when no autotuning is in progress, it is far more efficient to represent the tuned controller as a continuous-time system, to exploit variable-step integration. This manuscript presents the first nucleus of a Modelica library of autotuning controllers, where the problem just mentioned is t...

The principle of feedback control is used in a wide variety of physical and engineering problems. For example, it can be applied in a straightforward way to tune the oscillation phase of a harmonic oscillator in order to achieve a desired synchronization. An intriguing and fundamental question is whether continuous feedback can be used to control quantum systems; for instance, if it is possible...

Managing the performance of e-commerce sites is challenging. Site content changes frequently, as do customer interests and business plans, contributing to dynamically varying workloads. To maintain good performance, system administrators must tune their information technology environment on an ongoing basis. Unfortunately, doing so requires considerable expertise and increases the total cost of...

A method is presented to extract musical features from melodic material. Various viewpoints are defined to focus on complementary aspects of the material. To model the melodic context, two measures of entropy are employed: A set of trained probabilistic models capture local structures via the information-theoretic notion of unpredictability, and an alternative entropymeasure based on adaptive c...

The vocal imitation of pitch by singing requires one to plan laryngeal movements on the basis of anticipated target pitch events. This process may rely on auditory imagery, which has been shown to activate motor planning areas. As such, we hypothesized that poor-pitch singing, although not typically associated with deficient pitch perception, may be associated with deficient auditory imagery. P...