this study was an attempt to shed light on the use of requestive speech act by iranian nonnative speakers (nnss) of english and canadian native speakers (nss) of english to find out the (possible) similarities and/or differences between the request realizations, and to investigate the influence of the situational variables of power, distance, context familiarity, and l1’s (possible) influence. ...

This article is based on a research on identifying different stakeholders’ concerns for system architecture and design. It explores if the different stakeholders’ need for system architecture information is related to their concerns. It addresses two important research questions on system architecture descriptions, namely, 1) Do all stakeholders have different needs for information on system ar...

We present some results obtained recently in signal processing in the so-called “sparse representations” domain and indicate how they can be applied to a very specific and limited problem in realization theory. This is mainly to bring these type of results to the knowledge of this community. Other applications in order estimation for instance are potentially feasible. The basic problem is the f...

1.1. This article surveys some developments in pure mathematics which have, to varying degrees, grown out of the ideas of gauge theory in Mathematical Physics. The realisation that the gauge fields of particle physics and the connections of differential geometry are one and the same has had wide-ranging consequences, at different levels. Most directly, it has lead mathematicians to work on new ...

The Löwner approach, based on the factorization of a special-structure matrix derived from data generated by a dynamical system, has been applied successfully to realization theory, generalized interpolation, and model reduction. We examine some connections between such approach and that based on bilinearand quadratic differential forms arising in the behavioral framework. Dedicated to Prof. Ha...

Here we present a novel approach to audio signal enhancement based on psychoacoustic principles. Specifically, we describe a short-time spectral amplitude estimator whose form comprises a weighted sum of the minimum mean-square error solution and the observed spectral value, where the weighting factor is given by the ratio of the masked threshold and this observed value. We then explore the con...

We consider forward rate rate models of Heath-Jarrow-Morton type, as well as more general infinite dimensional SDEs, where the volatility/diffusion term is stochastic in the sense of being driven by a separate hidden Markov process. Within this framework we use the previously developed Hilbert space realization theory in order provide general necessary and sufficent conditions for the existence...

Tool integration is still lacking appropriate solutions. For an integration project at DaimlerChrysler a number of requirements have been identified which shall lead to a sustainable integration framework being open to further evolution. The requirements are based on a number of principles and cover several levels: user, system, architectural, and realisation requirements. Having these requirem...

A precise zeta-function calculation shows that the contribution of the vacuum energy to the observed value of the cosmological constant can possibly have the desired order of magnitude albeit the sign strongly depends on the topology of the universe. The non-renormalizable, infinite contributions which have been recently shown to occur when one physically imposes boundary conditions on quantum ...

Recent theoretical research in finance argues that the value premium is due to a systematic risk factor attributable to costly reversibility. In testing the costly reversibility hypotheses, the study recognises that there are a number of other possible explanations that need to be controlled for. Behavioural finance literature suggests that the value premium may be driven by errors in expectati...