Aspect-oriented programming is a programming technique for modularizing concerns that crosscut the basic functionality of programs. In aspect-oriented programming, aspect languages are used to describe properties which crosscut basic functionality in a clean and a modular way. In the paper aspect languages are discussed and compared with domain-specific languages, mainly from the implementation point of view. The difference between aspect languages and aspect-oriented languages is also pointed out. To show that existing domain-specific language implementation approaches can be used also for aspect(-oriented) language implementation the aspect-oriented language AspectCOOL has been designed and implemented with the compiler/interpreter generator tool LISA.

One of the main problems in the design of mains line EMI filters is the uncertainty and ambiguity of their source and load impedances. As these impedances act namely the HF supply network impedance on the one hand, and the HF input impedance on the power input terminal of the protected equipment on the other hand. In the usually operating frequency range from 10 kHz to 30 MHz, both impedances are variable from some tenth Ohms to some hundreds of Ohms, and they are very substantially depended on the type, construction, and instantaneous load of the mains line network, in which the filter should be used. Since the insertion loss of an EMI line filter is dependent on the source and load impedances, most filter manufacturers provide the filter design for the matched 50 Ohms impedance system. From the above reasons of course, this may not give proper and estimated results in real mains line networks installation. The paper presents a new technique for so-called "worst-case" EMI filter design. It makes possible to predict the real insertion loss limit values of manufactured EMI filters working in arbitrary mains line impedance systems.

In this paper stochastic representation of teleworker activities in Ethernet networks are analyzed. The emphasis is on properties of self-similarity description and effective bandwidth estimation using the Hurst parameter method. Experimental results are presented for chat and desktop sharing trace.

In this paper we report a new approach to design of conventional microstatistic filters (CMF). This approach is based on the idea of describing the threshold decomposition operator by means of piecewise-linear functions. In particular we show that modification of the conventional mathematical model of the CMF yield a digital filters that can be considered to be a subset of the canonical piecewise-linear (CPWL) filters.

This paper deals with investigation of core losses in Switched Reluctance Motor (SRM), which is supplied by converter, if motor is loaded by rated torque and is running at various speeds. The core losses in the SRM consist mainly of hysteresis and eddy current losses. The winding losses are proportional to the square of the r.m.s current whereas the core losses are function of the excitation frequency and flux density, but the flux density depends on stator current waveforms. The different parts of the SRM core are subjected to the different frequency of flux reversals when the SRM is operating at constant speed and load. The detail analysis of flux linkage waveforms in individual parts of SRM magnetic system is performed. The current waveforms are not sinusoidal and depend on operating conditions. This paper deals with investigation of core losses in individual parts of SRM magnetic system by means of two analytical approaches for different rotor speed. The total core losses are calculated for the real 3-phase 12/8 SRM and verified by measurements.

Decision diagrams (DDs) are frequently used and efficient data structures for discrete functions representation and manipulation. For different applications, different types of DDs have been defined. Most DD packages developed previously, such as: CUDD, BuDDy, TUD DD, BXD, CAL,... manipulate with binary decision diagrams (BDDs). This paper presents an approach for developing of a Universal Decision Diagram Package (UDDP) - application provided for manipulating with different types of shared multi-valued decision diagrams. The main idea is to develop core of a system that permits construction of various decision diagrams for different classes of discrete functions, and involve methods for DD manipulation independently on a concrete DD type. The core is simply adaptable for manipulation with different DD types. In the present version UDDP maintains manipulation with DDs for representation of functions defined in finite fields (qDDs), Multi-terminal decision diagrams (MTDDs) and Edge-valued decision diagrams (EVDDs). On the other side, UDDP is an "open source" project. It can be easy extended to the manipulation with other kinds of DDs. UDDP provides an effective component for visual representation of DDs. This component is also independent on the type of the DDs.

The paper deal with an algorithm of calculation of orthonormal K-channel wavelets by iterating on the impulse response coefficients of the quadrature mirror filters(QMF) having linear-phase. The K-channel bank of QMF with perfect reconstruction property, in contrast with conventional design techniques that atempt to find a unitary alias-component matrix in the frequency domain, will be designed in the time domain, based on time-domain orthonormality constraints. The K-channel design problem is reduced to the problem of finding a suitable lowpas filter g0(n) via iterative optimization method maximizing subband gain .for various combinations of K-channels and the filter length N. By imposing further constraints on the lowpas impulse response, the continuous bases of K-channel wavelets and scaling function with good regularity properties were constructed.

This paper deals with the virtual-reality system focused to kinematic and statokinetic and visualisation subsystems. Main stream of this paper described a modelling of human hand. Model of human hand is based on skeleton model with using of complex geometric transformations.
The paper is divided to three parts. First part described anatomy of human hand. This part include also dividing of appropriate joints to three types: carpal-metacarpal joint (bolster type), metacarpalsegment joints (spherical type) and intersegment joints (roller type). In second part, based on these knowledges, is designed wireframe model of human hand. Every finger is approximated with linear construction and every construction contains rotation nodes and edges with fixed length. Here are also analysed possibilities of finger hang and tightening and draw in metacarpalsegment joint. Next are listed appropriate relations for geometric transformations. As example is used forefinger model. In the next subchapter are analysed possibilities of finger hang in proximal and distant intersegment joint and relations for appropriate transformations. Next subchapter contains analyse of thumb motion: rotation in carpal-metacarpal joint, tightening and draw and hang of thumb in intersegment joint. Considering to selfhood must be thumb solve separately. In the last part are described advantages and disadvantages of this solving. This part contains an example of output from program implementation.

Nowadays Human-Computer Interfaces (HCI) are widely studied and became one of the major interests among scientific community. Due to last decades progresses in the field of speech technologies, like Automatic Speech Recognition (ASR) and Text-To-Speech synthesis (TTS) and in the field of Natural Language Processing (NLP), voice enabled interfaces and spoken dialogue systems are hopefully going to became more and more common.
A dialogue management system is a system for managing the interactions between a person and a computer in a conversational interface. Spoken dialogue systems can be classified in to three main types, according to the methods used to control the dialogue with user: finite state-based systems, frame-based systems and agent-based systems. This paper describes basic principles of these methods and their application in dialogue systems as well as dialogue management techniques which have been developed for spoken dialogue systems and methods that have been adopted in some well-know dialogue systems.

This article is writing about the problems of cooling systems for generators, which are used in Electro Power station in Vojany. We are designed new automatic temperature regulation by used a mathematic model. This automatic temperature regulation helps to improve a temperature conditions in generator and bring also economical benefit.