Defi-crime: condition, trends and criminological models

Objective: to develop a criminological concept of DeFi-crime and measures to deter it.Methods: dialectical materialism and the general scientific methods of cognition based on it, used in the Russian criminology.Results: a criminological concept of DeFi-crime as a type of digital crime was developed, i.e. a new specific criminological theory of DeFi-crime (DeFi-criminology) within the structure of digital criminology was proposed. The information factors influencing the DeFi-crime state, structure and trends were determined, and measures for its deterrence by criminological and technological means were proposed.Scientific novelty: the presented work is the first and only study conducted within the framework of digital criminology, reflecting the state, trends and structure of DeFi-crime, revealing the main causes that form it, as well as describing options for deterring this type of digital crime by technological and criminological means.Practical significance: the study results can be used in law enforcement activities when assessing potential threats from DeFicrime and developing measures to reduce them; in educational activities – in the process of teaching courses in criminology, cybercriminology, digital criminology; in research activities – when obtaining additional knowledge on certain types of DeFi–crime: DeFi-theft and DeFi-fraud during their further research in DeFi-criminology

Using digital technologies in the stock market: The criminal law aspect

Under sanctions, digital services and products that are not affected by restrictions are of particular interest to unqualified investors of the Russian stock market. The possibility of illegal use of digital technologies in the stock market has not gone unnoticed by people with criminal intent. This article analyzes the already existing illegal practices in the stock market of using digital technologies and services, and also identifies criminal legal risks of their potential development in the future. The authors use general scientific methods of research as synthesis, analysis, induction, deduction, classification, as well as special methods (systematical, structural and dogmatical, as well as content analysis methods) based on a wide range of judicial practice. As a result, the authors formulate the following main areas of using digital technologies in the stock market for criminal purposes: 1) obtaining unauthorized access to users’ personal accounts; 2) organizing the activities of financial pyramids and illegal forex dealers; 3) fraudulent activity through the marketing of financial services by illegal financial market participants; 4) using artificial intelligence for the purposes of false trading. It has been established that the measures currently taken by supervisory and law enforcement agencies are not sufficient to protect unqualified investors from the criminal actions of malefactors. At the same time, the need to strengthen control over the use of digital technologies will require finding a balance between minimizing risks by government agencies and continuing to actively use new technologies on the Russian stock market

Transformation of law in the context of digitalization: defining the correct priorities

The subject under analysis is the peculiarities around the legal regulation of digital technologies and products arising from digital technologies. The choice of this topic was predetermined by the active development of digital services and digital financial assets, and the necessity to adapt modern legislation to the needs of the digital economy. Despite the fact that several strategies for the development of digital law are being worked out at the level of international organizations, neither in theory nor in practice is there a single understanding of the legal nature of digital technologies and the foundations of their legal regulation.From this perspective, the purpose of this article is to understand the system and the main categories of the digital economy through the prism of fundamental legal institutions, based both on the traditional principles of scientific analysis and on the results steaming from applied data processing methods.Using methods of theoretical modeling, idealization, and theoretical experiments, the authors consider the categories of legal personality, security, and tort of digital technologies and products, compare them with similar legal institutions, and determine possible options for integrating new legal categories into traditional rule of law on contracts, liability, and the protection of intellectual rights.As a result of the study, the authors have assembled their vision of those benchmarks, on which international strategies for regulating the digital economy should be built. The authors proceed from the fact that the adaptive capabilities of traditional law are very limited in relation to digital technologies; furthermore, in relation to many of them, qualitatively new legal models should be developed. The article presents the results of a review of the main legal parameters of digital technologies. Formulations of legal personality and protection are proposed, definitions of digital technology products in civil and copyright law are formulated.The conclusion reached concerns the inconsistency of approaches to assessing the legal nature of digital objects, and the insufficient consideration of the technical aspects of digital technologies, as well as the need to develop — at the international level — a unified legal strategy for civil and intellectual law regarding digital technologies. This study underlines, among the priority tasks and directions, the issues of legal personality of digital technologies, and the essential mechanisms for the protection of products using digital technologies. The conclusions formulated in the article have important practical and methodological significance, and can be taken into account when reforming the current legislation

Experimental and theoretical analysis of the upper critical field in FSF trilayers

The upper critical magnetic field H_{c2} in thin-film FSF trilayer spin-valve cores is studied experimentally and theoretically in geometries perpendicular and parallel to the heterostructure surface. The series of samples with variable thicknesses of the bottom and of the top Cu_{41}Ni_{59} F-layers are prepared in a single run, utilizing a wedge deposition technique. The critical field H_{c2} is measured in the temperature range $0.4-8$ K and for magnetic fields up to 9 Tesla. A transition from oscillatory to reentrant behavior of the superconducting transition temperature versus F-layers thickness, induced by an external magnetic field, has been observed for the first time. In order to properly interpret the experimental data, we develop a quasiclassical theory, enabling one to evaluate the temperature dependence of the critical field and the superconducting transition temperature for an arbitrary set of the system parameters. A fairly good agreement between our experimental data and theoretical predictions is demonstrated for all samples, using a single set of fit parameters. This confirms adequacy of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) physics in determining the unusual superconducting properties of the studied Cu_{41}Ni_{59}/Nb/Cu_{41}Ni_{59} spin-valve core trilayers.Comment: 16 pages, 7 figures; published versio

Influence of randomly distributed magnetic nanoparticles on surface superconductivity in Nb films

We report on combined resistance and magnetic measurements in a hybrid structure (HS) of randomly distributed anisotropic CoPt magnetic nanoparticles (MN) embedded in a 160 nm Nb thick film. Our resistance measurements exhibited a sharp increase at the magnetically determined bulk upper-critical fields Hc2(T). Above these points the resistance curves are rounded, attaining the normal state value at much higher fields identified as the surface superconductivity fields Hc3(T). When plotted in reduced temperature units, the characteristic field lines Hc3(T) of the HS and of a pure Nb film, prepared at exactly the same conditions, coincide for H10 kOe they strongly segregate. Interestingly, the characteristic value H=10 kOe is equal to the saturation field of the MN. The behavior mentioned above is observed only for the case where the field is normal to the HS, while is absent when the field is parallel to the film. Our experimental results suggest that the observed enhancement of surface superconductivity field Hc3(T) is possibly due to the not uniform local reduction of the external magnetic field by the dipolar fields of the MN.Comment: to be published in Phys. Rev.

B\"{a}cklund transformations for the constrained dispersionless hierarchies and dispersionless hierarchies with self-consistent sources

The B\"{a}cklund transformations between the constrained dispersionless KP hierarchy (cdKPH) and the constrained dispersionless mKP hieararchy (cdmKPH) and between the dispersionless KP hieararchy with self-consistent sources (dKPHSCS) and the dispersionless mKP hieararchy with self-consistent sources (dmKPHSCS) are constructed. The auto-B\"{a}cklund transformations for the cdmKPH and for the dmKPHSCS are also formulated.Comment: 11 page

Аутоиммунные ревматические заболевания: принципы диагностики и лечения

ПОСОБИЯАУТОИММУННЫЕ БОЛЕЗНИИММУННОЙ СИСТЕМЫ РАССТРОЙСТВАРЕВМАТИЧЕСКИЕ БОЛЕЗНИ /ИММУНОЛОГИЯAUTOIMMUNE RHEUMATIC DISEASESИНОСТРАННЫЕ СТУДЕНТЫАСПИРАНТЫМАГИСТРАНТЫКЛИНИЧЕСКИЕ ОРДИНАТОРЫИНТЕРНЫВРАЧИВ пособии представлены современные классификационные критерии аутоиммунных ревматических заболеваний, рассмотрены вопросы диагностики и дифференциальной диагностики, основанные на анализе клинических данных, результатов лабораторных и инструментальных исследований, приводятся современные общепризнанные схемы лечения аутоиммунных ревматических заболеваний. Издание предназначено для студентов медицинских вузов, магистрантов, аспирантов, клинических ординаторов, врачей-интернов, а также для врачей-ревматологов, врачей-терапевтов

Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers

We studied the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state establishing due to the proximity effect in superconducting Nb/Cu41Ni59 bilayers. Using a special wedge-type deposition technique, series of 20-35 samples could be fabricated by magnetron sputtering during one run. The layer thickness of only a few nanometers, the composition of the alloy, and the quality of interfaces were controlled by Rutherford backscattering spectrometry, high resolution transmission electron microscopy, and Auger spectroscopy. The magnetic properties of the ferromagnetic alloy layer were characterized with superconducting quantum interference device (SQUID) magnetometry. These studies yield precise information about the thickness, and demonstrate the homogeneity of the alloy composition and magnetic properties along the sample series. The dependencies of the critical temperature on the Nb and Cu41Ni59 layer thickness, Tc(dS) and Tc(dF), were investigated for constant thickness dF of the magnetic alloy layer and dS of the superconducting layer, respectively. All types of non-monotonic behaviors of Tc versus dF predicted by the theory could be realized experimentally: from reentrant superconducting behavior with a broad extinction region to a slight suppression of superconductivity with a shallow minimum. Even a double extinction of superconductivity was observed, giving evidence for the multiple reentrant behavior predicted by theory. All critical temperature curves were fitted with suitable sets of parameters. Then, Tc(dF) diagrams of a hypothetical F/S/F spin-switch core structure were calculated using these parameters. Finally, superconducting spin-switch fabrication issues are discussed in detail in view of the achieved results.Comment: 34 pages, 9 figure

Generalized Darboux transformations for the KP equation with self-consistent sources

The KP equation with self-consistent sources (KPESCS) is treated in the framework of the constrained KP equation. This offers a natural way to obtain the Lax representation for the KPESCS. Based on the conjugate Lax pairs, we construct the generalized binary Darboux transformation with arbitrary functions in time $t$ for the KPESCS which, in contrast with the binary Darboux transformation of the KP equation, provides a non-auto-B\"{a}cklund transformation between two KPESCSs with different degrees. The formula for N-times repeated generalized binary Darboux transformation is proposed and enables us to find the N-soliton solution and lump solution as well as some other solutions of the KPESCS.Comment: 20 pages, no figure

HYSTYOCYTOSIS X: VERIFICATION OF DIAGNOSIS

A clinical case of histiocytosis X, rarely found in the practice of a dermatovenereologist, is described, the pathognomonic clinical symptoms of this dermatosis, including skin lesions, that occur in 50 to 80 % of cases of all forms are displayed. The modern classification of histiocytosis, pathogenetic mechanisms of development and clinic of histiocytosis Х are given. Particular attention is paid to diagnostic methods, the necessity of interaction of narrow specialists (dermatovenerologists, hematologists, oncologists, pulmonologists) is underlined