Gaussian is a widely used scientific code with application areas in chemistry, biochemistry and material sciences. To operate efficiently on modern architectures Gaussian employs cache blocking in the generation and processing of the twoelectron integrals that are used by many of its electronic structure methods. This study uses hardware performance counters to characterise the cache and memory...

Stiction is a well known problem of the process performance. Compensate its effect is essential, because most of sticky valves cannot be replaced and they remain working for months or years. The scope of this work is to propose a novel methodology to compensate stiction effects, through the modification of the controller (PI) block in the control loop. The proposed approach is based on the two ...

The proper measure of closed-loop performance variation in the presence of modelplant mismatch is discussed in this paper. A generalized closed-loop error transfer function, which is a special representation of the dual Youla parameter and has a close relationship with the pointwise ν -gap metric, is proposed as the suitable means of representing closedloop performance variation in case of plan...

Reconfigurable Computing (RC) is one of the most intensively studied research areas nowadays due to its potential to dramatically increase application performance. RC combines a general purpose processor (GPP) and a Field Programmable Gate Array (FPGA), having the advantages of both hardware performance and software flexibility. Modern real-life applications (such as audio, video, image process...

Motion estimation is a vital function of video coders that utilize motion compensated prediction to exploit the temporal redundancy of video signals. The reference images used in the motion estimation process can be either original images (open-loop architecture) or reconstructed images (closedloop architecture). While the closed-loop architecture is intuitively superior to the open-loop archit...

The LQG controllers significantly improve antenna tracking precision, but their tuning is a trial-and-error process. A control engineer has two tools to tune an LQG controller: the choice of coordinate system of the controller, and the selection of weights of the LQG performance index. The paper selects the coordinates of the open-loop model that simplify the shaping of the closed-loop performa...

Parallelising compilers typically need some performance estimation capability in order to evaluate the trade-oos between diierent transformations. Such a capability requires sophisticated techniques for analysing the program and providing quantitative estimates to the compiler's internal cost model. Making use of techniques for symbolic evaluation of the number of iterations in a loop, this pap...