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Content available remote Assessment of thermal diffusion in the natural biological environment
EN
In this article, the application of the Ångström method in estimating the thermal diffusion parameter in an example of natural biological environment is described. The present study is based on measurements performed in forest soils. The main advantage of the suggested procedure is that it does not need the collection of samples of the soil for a later study in the laboratory. Collecting such data is typically very laborious and requires the preservation of the natural content and structure of all elements of the soil profile in the samples, such as organic components, soil parts, or rocks. The harmonic time runs necessary to implement the Ångström method were computed with the short-time Fourier transform. The obtained results, compared with reference values taken from literature, confirm the accuracy of the proposed methodology.
2
EN
The paper presents an application of the Lopot-plot, which compares the time-averaged concentration (TAC) and the time-averaged deviation (TAD) of the weekly dialysis cycle, to comprise the results of intensive computational study. The presented case is based on 420 one-week-cycle simulations to verify the consequences implied by the change of the treatments schedule from nonuniformly to uniformly distributed over the week. The concept of steady state is explained and utilized to obtain periodical runs of the urea concentration. The presented graphs encouragingly indicate the potential of such plots in presenting results of multivariable intensive computations that should be advisably performed during the planning process of hemodialysis treatment.
EN
The paper presents the analytical formula describing the relationship between the maximum value of an annual tree stand height increment and the age at which it takes places. The estimation of considered parameters was based on Czarnowski`s theory of tree stand dynamics. The empirical data from 19 height growth benchmarks representing all site quality indexes of two species – beech and spruce – from experimental thinning plots were taken into consideration.
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