Physical database design can be marked as a crucial step in the overall design process of databases. The outcome of physical database design is a physical schema which describes the storage and access structures of the stored database. The selection of an eecient physical schema is an NP-complete problem. A signiicant number of eeorts has been reported to develop tools that assist in the select...

Despite enjoying the resulting freedom from physical constraints that can result from the incorporation of computer technology in electronic musical instruments as musicians are enabled to push back the creative boundaries within which they work, musicians are still searching for virtual instruments that come closer to their physical counterparts in terms of their playing experience. This paper...

Introduction: Existing nonlinear system identification techniques include (a) approximating the practical system with artificial mathematical models; (b) the use of describing functions; and (c) the use of a physical model. In systems and control engineering, a practical system is usually described by a set of differential equations derived from the physical mechanism of the system [1,2]. For a...

This review is based on an extensive work done in collaboration with N. Gorkavyi, J. Mather, and T. Taidakova, which aimed at the physical modelling of the interplanetary dust (IPD) cloud in the Solar system, i.e., establishing a link between the observable characteristics of the zodiacal cloud and the dynamical and physical properties of the parent minor bodies. Our computational approach perm...

In this paper we introduce the use of bond graphs for the implementation of classic physical models of musical instruments. Bond graphs are a diagrambased technique for representing physical systems, such as an electrical circuit or a mechanical engine. They provide a precise and unambiguous modelling tool which allows for the specification of hierarchical physical structures. The paper begins ...

In this paper we present modeling and simulation for physical vapor deposition for metallic bipolar plates. In the models we discuss the application of different models to simulate the transport of chemical reactions of the gas species in the gas chamber. The so called sputter process is an extremely sensitive process to deposit thin layers to metallic plates. We have taken into account lower o...

After recent advances in coding of natural speech and audio signals, also the synthetic creation of musical sounds is gaining importance. Various methods for waveform synthesis are currently used in digital instruments and software synthesizers. A family of new synthesis methods is based on physical models of vibrating structures (string, drum, etc.) rather than on descriptions of the resulting...

Qualitative physics has achieved considerable success in small and moderate scale problems but methods for managing the scope and depth of knowledge used by human problem solvers remain elusive. We argue that generality in a modelling approach is essential for extending qualitative physics to complex systems. A novel new model architecture is proposed which combines qualitative and quantitative...