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Anna Piwowar

Abstract

This paper presents the method of analysis of parametric systems in frequency domain. These systems are also referred to as linear time varying systems (LTV). The article includes a description of an analytical method for determining the frequency response of the first order parametric circuit with non-periodically variable parameters. The results have been illustrated by an example.

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Anna Piwowar and Janusz Walczak

Abstract

Effective algorithms of constructing models of generalized parametric sections of the n-th order consisting of cascade and parallel elementary LTV section connections are presented in this paper. Moreover, the methods of impulse responses determination have been shown

Open access

Andrzej Bodak, Anna Cierniak-Emerych, Małgorzata Gableta, Agata Pietroń-Pyszczek and Katarzyna Piwowar-Sulej

Summary

In this study - based on the result of own and others empirical research, regarding conditions of person’s functioning in the process of work during the last decade of 2000’s - an attempt of indicating dilemmas connected with shaping of employment security has been made. The field of study was approached not only from the perspective of employees and employers, but also with the intent of showing the diversity of solutions adopted in this area The results of presented research have confirmed the validity of solutions postulated by science, in relation to the results of monitoring of the turbulent economic environment and the progressing changes in employees’ expectations