Vladislav Shchukin

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A binary code is called a superimposed cover-free (s, ℓ)-code if the code is identified by the incidence matrix of a family of finite sets in which no intersection of ℓ sets is covered by the union of s others. A binary code is called a superimposed list-decoding s L-code if the code is identified by the incidence matrix of a family of finite sets in which(More)
A binary code is called a superimposed cover-free (s, &#x2113;)-code if the code is identified by the incidence matrix of a family of finite sets in which no intersection of &#x2113; sets is covered by the union of s others. A binary code is called a superimposed list-decoding s<sub>L</sub>-code if the code is identified by the incidence matrix of a family(More)
A binary code is said to be a disjunctive list-decoding s L-code, s ≥ 1, L ≥ 1, (briefly, LD s L-code) if the code is identified by the incidence matrix of a family of finite sets in which the union of any s sets can cover not more than L − 1 other sets of the family. In this paper, we introduce a natural probabilistic generalization of LD s L-code when the(More)
We discover some important properties of cover-free (CF) codes, separating system (SS) codes and completely separating system (CSS) codes connected with the concept of constant weight CF codes. New upper and lower bounds on the rate of CF and SS codes based on the known results for CF and CSS codes are obtained. Tables of numerical values for the improved(More)
Laser-induced fluorescence (LIF) spectra of calcified human heart-valve tissue and LIF spectra of macroscopic calcinosis fragments dissected from human heart valves were compared with LIF spectra of pig myocardium tissues. Excitation was provided by an excimer laser with wavelength lambda = 248 nm. Fluorescence bands that were due to mineral and organic(More)
Under study were the frequency of occurrence and causes of development of the syndrome of low cardiac output after the saving correction of mitral defects under conditions of cranio-cerebral (1st group-80 patients), general moderate (2nd group-130 patients) and deep hypothermia (open mitral commissurotomy-3rd group of 134 patients and reconstructive(More)
In the given article we generalize a construction presented in [3]. We give a method of constructing a cover-free (s, ℓ)-code. For k > s, our construction yields a (n s) ℓ × n k cover-free (s, ℓ)-code with a constant column weight. Let N , t, s and ℓ be integers, where 1 ≤ s < t and 1 < ℓ < t − s. Let denote the equality by definition, |A| – the size of the(More)