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The solutions of non-stationary equation of thermoconductivity for the optical non-transparent thermoelement at impulse ray excitement are presented in the paper for two time ranges: when the ray current falls (0<t&lt...

The main aim of this article is to verify whether the companies operating in Polish healthcare industry could be included into the group of so called defensive companies. The value of such companies during recession does...

Modelling and estimating relationships that combine time series and crosssectional data is often discussed in the statistical literature but in these considerations sampling errors are seldom taken into account. In the p...