Alena Kostalova

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The introductory part of this paper concerns a marketing survey of the utilization of postal and telecommunication services in a regional entrepreneurial environment. The methodology of the chi-square test of independence between two qualitative statistic figure values is detailed in the next part of the paper. This methodology is applied to the results of(More)
Aracytidine (cytarabine, 1-beta-D-arabinofuranosylcytosine) is a synthetic analog of cytidine in which ribose is substituted by arabinose; it is used as a drug for the treatment of leukemia. A fast and reliable capillary electrophoretic method for the analysis of cytarabine and cytidine is described. The procedure utilizes the interactions with sodium(More)
Radially operated networks may be switched to change configuration in order to improve performance. Changing one configuration into another involves finding and sequencing ON/OFF switching steps. This is in general a complex task as the switching step possibilities must be dynamically investigated in order neither to create meshes nor to lose connectivity.(More)
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