16 research outputs found

    Counting function fluctuations and extreme value threshold in multifractal patterns: the case study of an ideal 1/f1/f noise

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    To understand the sample-to-sample fluctuations in disorder-generated multifractal patterns we investigate analytically as well as numerically the statistics of high values of the simplest model - the ideal periodic 1/f1/f Gaussian noise. By employing the thermodynamic formalism we predict the characteristic scale and the precise scaling form of the distribution of number of points above a given level. We demonstrate that the powerlaw forward tail of the probability density, with exponent controlled by the level, results in an important difference between the mean and the typical values of the counting function. This can be further used to determine the typical threshold xmx_m of extreme values in the pattern which turns out to be given by xm(typ)=2clnlnM/lnMx_m^{(typ)}=2-c\ln{\ln{M}}/\ln{M} with c=3/2c=3/2. Such observation provides a rather compelling explanation of the mechanism behind universality of cc. Revealed mechanisms are conjectured to retain their qualitative validity for a broad class of disorder-generated multifractal fields. In particular, we predict that the typical value of the maximum pmaxp_{max} of intensity is to be given by lnpmax=αlnM+32f(α)lnlnM+O(1)-\ln{p_{max}} = \alpha_{-}\ln{M} + \frac{3}{2f'(\alpha_{-})}\ln{\ln{M}} + O(1), where f(α)f(\alpha) is the corresponding singularity spectrum vanishing at α=α>0\alpha=\alpha_{-}>0. For the 1/f1/f noise we also derive exact as well as well-controlled approximate formulas for the mean and the variance of the counting function without recourse to the thermodynamic formalism.Comment: 28 pages; 7 figures, published version with a few misprints corrected, editing done and references adde

    State purchases of medical production: from a new public management to management of public values

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    <p>The article presents the literature review analysis focusing on the problems concerned with hospitals state resources supply. The characteristics of purchase management in the modern socio-economic conditions are highlighted.</p&gt

    Global distribution and variation of the invasive cheilostome bryozoan Cribrilina mutabilis

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    Viable populations of the cheilostome bryozoan Cribrilina mutabilis Ito, Onishi & Dick exist in the NW Pacific (Russian Far East and northern Japan), NE Atlantic (Scandinavia and Scotland), and NW Atlantic (Maine, USA). The first NE and NW Atlantic records are from Norway (2008) and Casco Bay, Maine, USA (2018), respectively, indicating a relatively recent introduction to the region. Mitochondrial COI gene sequences from North Atlantic populations (Sweden, Norway, and Maine) showed two haplotypes differing by one substitution, but differed from two haplotypes from Akkeshi, northern Japan, by 6–8 substitutions. North Atlantic populations differed morphologically from the Akkeshi population in that some zooids formed a suboral projection, and frontal zooids were more common. While C. mutabilis in northern Japan has been found only on natural or artificial eelgrass (Zostera marina), across its range it has been found on several species of algae, plastic panels and strips, several species of Zostera, and mollusc shells. Similar frequencies of heteromorphic zooids with differing degree of frontal wall calcification, i.e., R (rib)-, I (intermediate)-, and S (shield)-type zooids, in colonies on eelgrass at comparable times of the season and across populations suggest an innate response to seasonal environmental fluctuations, although zooid frequencies were different on non-eelgrass substrates. The increase in trans-Arctic shipping along the Northern Sea Route in recent decades, and previous documentation of C. mutabilis on ship hulls in the Sea of Japan, indicate a clear mechanism for anthropogenic introduction from the Far East to Europe in recent decades

    Cell technologies in cardiology

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    The treatment of congestive heart failure (CHF) is leading problem of the Health Care in our time. The principal achievement of two recent decades: not only to treat symptoms of decompensation but also to try to decelerate progression of the disease. All current methods of therapy for CHF, which are aimed just at improving the prognosis of disease, can be subdivided into several principal groups: 1) blockade of cardiomyocyte death; 2) improvement of the heart pump function; 3) decrease of heart remodeling; and 4) increase in the volume of viable myocardium. The article has been showing modem points of view on each of the above-mentioned fields

    Anxiety: Phenomenology, epidemiology, and risk factors during the novel coronavirus SARS-CoV-2 (COVID-19) pandemic [Тревожность: феноменология, эпидемиология и факторы риска на фоне пандемии, вызванной новым коронавирусом SARS-CoV-2 (COVID-19)]

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    The novel coronavirus disease 2019 (COVID-19) pandemic has caused significant negative clinical and social impact on peoples' life worldwide. Anxiety, one of the most prevalent mental conditions, tends to spread during periods of social upheaval. The present paper examines the problem of anxiety and reviews epidemiology of anxiety, its risk factors and underlying mechanisms. It discloses associations between anxiety and addictions, lifestyle factors and traumatic childhood experience, and discusses increased anxiety in the context of the novel coronavirus disease (COVID-19) pandemic in Russia. © 2021 Ima-Press Publishing House. All rights reserved
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