Several economical time series such as exchange rates US$/British Pound, USA Treasure Bonds rates and Warsaw Stock Index WIG have been investigated using the method of recurrence plots. The percentage of recurrence REC and the percentage of determinism DET have been calculated for the original and for shuffled data. We have found that in some cases the values of REC and DET parameters are about...

Many companies in the U.S. are entering the wood pellets market due to the increasing importance of woody biomass utilization for energy purposes. Despite a 200% increase in U.S. production, it is difficult to obtain reliable information from the research community relative to the production costs, requirements, and market trends for wood pellets. Based on comprehensive investigations, a techno...

lateral resistance of railway track is one of the most important parameters in lateral stability. this parameterdepends!on the conditions of different components of ballasted railway track (such as density of ballast layer,sleeper spacing, type of sleeper, etc.). from this perspective, type of sleeper has an important effect on lateralresistance. however in some conditions, in technical and eco...

BACKGROUND Understanding the distinction between function and role is vexing and difficult. While it appears to be useful, in practice this distinction is hard to apply, particularly within biology. RESULTS I take an evolutionary approach, considering a series of examples, to develop and generate definitions for these concepts. I test them in practice against the Ontology for Biomedical Inves...

the asia-pacific region generates over half of global economic activity (54.2%) and about 43.7% of global trade, and is the most dynamic region in the global economy. at the core of this is an increasingly dynamic, vibrant and entrepreneurial small-medium sized enterprise sector. advances in information and communications technology, market liberalisation and moves towards closer regional econo...

despite a lot of efforts and investigations worldwide, dnr is still a controversial issue in many countries. in iran although significant achievements are reached in different fields; end of life care is hardly considered as a scientific necessity. development and implementation of clear policies for dnr orders is required to prevent futile prolongation of death, psychological stress to the pat...

A number n is said to be economical if the prime power factori-sation of n can be written with no more digits than n itself. We show that under a plausible hypothesis, related to the twin prime conjecture, there are arbitrarily long sequences of consecutive economial numbers, and exhibit such a sequence of length 9.

This article empirically assessed new opportunities and provides a conceptual justification for promising areas of trade financial economic relations between China Russia amidst ongoing global turbulence, the post-COVID situation, sanctions pressure. The study utilized gravity model, taking into account latest trends in development research subject object, as well current challenges economy. re...