20180817 10:50 
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20180730 13:13 
The Influence of the Type of Electrodes on the Biological Impedance Measurement
Prokopyeva, Elena
Electric impedance during meat storage can be affected by various processes: microbial growth, changing of ions mobility, structural changes, etc. Impedance of biological tissues is frequency dependent. The aim of current study is to determine and evaluate the impedance properties of pork meat using two types of electrodes. Measurements were performed during three days in frequency range 100 Hz ÷ 1 MHz.
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20180730 13:13 
Stability of the Zero Solution of Stochastic Differential System
Klimešová, Marie
Stability of stochastic differential equations (SDEs) has become a very popular theme of recent research in mathematics and its applications. The method of Lyapunov functions for the analysis of qualitative behavior of SDEs provide some very powerful instruments in the study of stability properties for concrete stochastic dynamical systems, conditions of existence the stationary solutions of SDEs and related problems.
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20180730 13:13 
Solution of a Weakly Delayed Difference System
Šafařík, Jan
The paper solves a weakly delayed difference systém x(k+1) = Ax(k)+Bx(k1) where k = 0;1; : : : , A = (ai j)3 i; j=1, B = (bi j)3i ; j=1 are constant matrices. An explicit solution is given with a discussion on the number of independent initial data.
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20180730 13:13 
Signal Filtration for Detecting Electromagetic Emission
Podshivalov, Aleksandr
There are many methods to describe and study geological processes. This paper deals with a data measured by a loop antenna in a dripstone cave. The measuring system, the sequence of the experiment, and result of signal filtering and spectral analysis were described. Several artificial noise sources in different frequency of signal spectrum bands were found. Signal filtering was carried out. On the basis of the filtered signal central moments during a few days were calculated.
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20180730 13:13 
Rough Sets on State Spaces of Automata
Staněk, David
This paper discussed a subclass of finite automata, which have ordering on the state sets created by a transition (or nextstate) function. Hence, there do not exist cycles of more than one element. We discuss a relation of equality of upper closure on the systems of all subsets of state systems of quasiautomata, which creates an equivalence.
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20180730 13:13 
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20180730 13:13 
Microstructural Defects of Solar Cells Investigated by a Variety Diagnostics Methods
Škvarenina, L’ubomír
This paper discusses the application of a variety diagnostic methods applicable to the solar cells. More objective results about solar cells quality and reliability are possible to obtain by using a various methods. Diagnostic methods described in this paper are based on a dark and illuminated J–V characteristics, a investigation of noise in a wide range of frequency and a radiation detection at a di erent spectral range, namely by an electroluminescence and a thermography method. These methods are primarily more appropriate for a detection or a localization of microstructure defects when a reversebias stress is applied. However, the analysis of a forwardbias conditions is included in an investigation of J–V characteristics as well.
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20180730 13:13 
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20180730 13:13 
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