E. Kadlecova

Brno University of Technology, Brünn, South Moravian, Czech Republic

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Publications (13)0 Total impact

  • E. Kadlecova, M. Steinbauer
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    ABSTRACT: This paper presents information about design of light sources. The special light source was designed and constructed for the research activity on the lichen structure in the Antarctica. This research is made by the Institute of Experimental Biology, Masaryk University, Faculty of Science. Required properties were continuous spectral characteristic with respect to photosynthetically active wavelength area, possibility of luminous flux regulation and practically zero thermal effect to illuminated object. Owing to new high-performance LED this type of light source was selected. Design of light source consisting of high efficient white LED's, as well as experimental results, are presented.
    Applied Electronics, 2006. AE 2006. International Conference on; 10/2006
  • E. Kadlecova, M. Steinbauer
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    ABSTRACT: Materials with different magnetic susceptibility can cause deformation of magnetic field in MR tomograph, resulting in errors in obtained image. Using simulation and experimental verification we can solve the effect of changes in homogeneity of static magnetic fields caused by specimen made from magnetic material in MR tomograph. This paper describes theoretical base and experimental measurement of new magnetic resonance imaging method for susceptibility measurement. This technique is suitable for substances with no signal in MR tomography. The method uses deformation of magnetic induction field in specimen vicinity. For MR purposes it is necessary to immerse specimen into reference medium with measurable MR signal (water is suitable).
    Applied Electronics, 2006. AE 2006. International Conference on; 10/2006
  • E. Kadlecova, P. Fiala, M. Zeman
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    ABSTRACT: The paper presents numerical analysis of the microwave absorber design. It is possible to use modified concept of the absorber. Modified absorber has appropriate properties and it is possible to use it in non-reflecting chamber construction. The non-reflecting chamber will be used for open space testing of relativistic microwave pulse generator; P<sub>max</sub>=500 MW, t<sub>p</sub>=10-100 ns. Presented work is a part of the project conducted in co-operation with VTUPV Vyskov, PROTOTYPA a.s. and TESLA Vrsovice Praha. An experimental testing of the proposed pyramidal absorbers was done in the laboratories located at UD Brno.
    Applied Electronics, 2006. AE 2006. International Conference on; 10/2006
  • E. Kadlecova, P. Fiala, T. Vojtek
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    ABSTRACT: The paper presents results of the analysis of the vibrational generator. The paper deals with the design of a vibrational generator that is used as a power supply for independent electric circuits. The vibrational generator can be used in the various areas, e.g. traffic, electronics, special-purpose machines, and robotics. The proposed design employs magnetic damping of the core movement. It was numerically evaluated and it was shown that it was possible to obtain significantly larger output voltage and output power than in experimental settings used previously [1].
    Applied Electronics, 2006. AE 2006. International Conference on; 10/2006
  • E. Kadlecova, R. Kubasek, E. Kolafova
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    ABSTRACT: This paper deals with inductor-resistor electrical circuits. The deterministic model of the circuit is replaced by a stochastic model by adding a noise term in both the source and the resistance. The analytic solution of the resulting stochastic differential equations is presented. Numerical simulations are obtained using the stochastic Euler method. Computer programs in C# are used to generate numerical solutions and their graphical representations. Simulation is verified by measurement of transient event on inductor-resistor electrical circuits.
    Applied Electronics, 2006. AE 2006. International Conference on; 10/2006
  • Source
    PIERS Online 01/2006; 2(6):676-680.
  • Source
    PIERS Online 01/2006; 2(6):689-693.
  • Eva Kadlecova, Pavel Fiala
    PIERS Online 01/2006; 2(6):644-647.
  • Eva Kadlecova, I. Behunek, Pavel Fiala
    PIERS Online 01/2006; 2(6):648-652.
  • Pavel Fiala, Eva Kadlecová
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    ABSTRACT: This paper presents information about new directions in the modelling of lighting systems, and an overview of methods for the modelling of lighting systems. The new R-FEM method is described, which is a combination of the Radiosity method and the Finite Elements Method. The paper contains modelling results and their verification by experimental measurements and by the Matlab simulation for this R-FEM method.
    Proceedings of the 7th WSEAS international conference on Automatic control, modeling and simulation; 03/2005
  • Pavel Fiala, Eva Kadlecová
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    ABSTRACT: This paper presents information about new directions in the modelling of lighting systems, and an overview of methods for the modelling of lighting systems. The new R-FEM method is described, which is a combination of the Radiosity method and the Finite Elements Method. The paper contains modelling results and their verification by experimental measurements and by the Matlab simulation for this R-FEM method.
    Proceedings of the 4th WSEAS international conference on Applications of electrical engineering; 03/2005
  • Source
    Kadlecova E, Fiala P
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    ABSTRACT: This paper presents information about new directions in the modelingof lighting systems, and an overview of methods for the modeling oflighting systems. The new R-FEM method is described, which is acombination of the Radiosity method and the Finite Elements Method. Thepaper contains modeling results and their verification by experimentalmeasurements and by the Matlab simulation for this R-FEM method.
    Radioengineering. 01/2004;
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    P Drexler, P Fiala, E Kadlecova
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    ABSTRACT: There are some suitable methods for ultra-short solitary electromagnetic pulses (EMP) measurement. The EMPs are generated by high power microwave generators. The characteristic of EMPs is high power level (P max = 250 MW) and very short time duration (t p ∈ <1, 60> ns). Special requirements for measurement methods are placed because of the specific EMPs properties.Two suitable methods for this application are presented in the paper. The first – calorimetric method, utilizes the thermal impacts of microwave absorption. The second method presented – magneto-optic method, use the Faraday's magneto-optic effect as a sensor principle. It was realized combined calorimetric sensor and there were made some experimental EMP measurements with good results. The sensor utilizing magneto-optic method is in development.

Publication Stats

3 Citations

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Institutions

  • 2005–2006
    • Brno University of Technology
      • Department of Theoretical and Experimental Electrical Engineering
      Brünn, South Moravian, Czech Republic