A method to determine the economic cost of gas turbine compressor fouling was developed. The method is based on the calculation of the influence of the drop of compressor performances (isentropic efficiency, pressure ratio and air mass flow) on Heat Rate and full load power of the gas turbine. A statistical procedure to quantify the drop of compressor performances with fouling and to obtain amb...

Performance Engineering uses multiple performance assessment tools depending on the state of the software and the amount of performance data available. This paper demonstrates how Web Services can be used to facilitate the use of modeling tools in a plug-and-play manner thus enabling the use of the tool best suited to the analysis. It describes the design and implementation of a prototype Web S...

This paper presents the magnetic resonator piano, an augmented instrument enhancing the capabilities of the acoustic grand piano. Electromagnetic actuators induce the strings to vibration, allowing each note to be continuously controlled in amplitude, frequency, and timbre without external loudspeakers. Feedback from a single pickup on the piano soundboard allows the actuator waveforms to remai...

The Intensive Care Unit is a complex, data-intensive and critical environment in which the adoption of Information Technology is growing. As physicians become more dependent on the computing technology to support decisions, raise real-time alerts and notifications of patient-specific conditions, this software has strong dependability requirements. The dependability challenges are expressed in t...

in this study we analyze the effects of environmental performance on the generation of firm value from dow jones sustainability index europe. we use a sample of 122 firms from different sectors, except financial one, which belong to this index for the years 2007 through 2009. the expected results, taking into account our hypotheses, should show a positive relationship between the generation of ...

Humans turn abstract referents and discourse structures into gesture using metaphors. The semantic relation between abstract communicative intentions and their physical realization in gesture is a question that has not been fully addressed. Our hypothesis is that a limited set of primary metaphors and image schemas underlies a wide range of gestures. Our analysis of a video corpus supports this...

Direct-sequence code-division multiple access (DS-CDMA) is currently the subject of much research as it is a promising multiple access capability for third and fourth generations mobile communication systems. The synchronous DS-CDMA system is well known for eliminating the effects of multiple access interference (MAI) which limits the capacity and degrades the BER performance of the system. In ...

Traditionally the forecast evaluation literature has focused on methods for assessing point forecasts and interval forecasts. Recently , however, density forecasting became very active and important area of research in the analysis of economic and financial time series with the introduction of simple and operational framework for density forecast evaluation by Diebold et al (1998). Density fore...

In this note we investigate the filtering problem for linear time-delay systems. Unlike most of the existing results, we consider systems with an unknown and constant delay. From the Razumikhin stability theorem and some judicious mathematical manipulations, a reduced order H∞ filter able to ensure the asymptotic stability and the pre-specified H∞ performances of the filtering process is design...