A geo-radar image of a recorded underground conduit has a hyperbolic shape in an electrically homogeneous background. Echograms of conduits, which are located close to one another, overlap leading to possible interpretation errors. The paper presents a method of experimental determination of resolving power capabilities of a given type of geo-radar equipment for the needs of detection of underground installations. It has been proved, basing on performed experiments that the horizontal resolving power of detection of underground installations depends on the type of applied geo-radar equipment and on the frequency of electromagnetic waves. Together with the increase of the dielectric constant of the medium, where underground installations are located, the horizontal resolving power also increases.

DNA sequencing remains one of the most important problems in molecular and computational biology. One of the methods used for this purpose is sequencing by hybridization. In this approach usually DNA chips composed of a full library of oligonucleotides of a given length are used, but in principle it is possible to use another types of chips. Isothermic DNA chips, being one of them, when used for sequencing may reduce hybridization error rate. However, it was not clear if a number of errors following from subsequence repetitions is also reduced in this case. In this paper a method for estimating resolving power of isothermic DNA chips is described which allows for a comparison of such chips and the classical ones. The analysis of the resolving power shows that the probability of sequencing errors caused by subsequence repetitions is greater in the case of isothermic chips in comparison to their classical counterparts of a similar cardinality. This result suggests that isothermic chips should be chosen carefully since in some cases they may not give better results than the classical ones.