Infrared spectra of some sulfides and their analogs of binary composition in the long-wave region

The far infrared spectra (500-60/cm) of some simple sulfides and their analogs were studied. In all, 22 minerals with different structure types were investigated, out of which 14 are sulfides (galena, alabandite, pyrrhotite, sphalerite, wurtzite, cinnabar, realgar, orpiment, getchelite antimonite, molybdenite, pyrite, marcasite and heazlewoodite) 6 arsenides (niccolite, domeykite, arsenopyrite, lollingite, rammelsbergite and skutterudite), one telluride (tetradymite) and native arsenic. The main bands of infrared absorption spectra of the minerals are compared with the relative strength of the interatomic bonds and their interpretation is given

Blood indices of broiler-chickens after supplementing their diet with solutions containing B-group and L-carnitine vitamins

The authors present the research results of the influence of aqueous solution of calcium pantothenate, nicotinamide, cyanocobalamin, folacin and L-carnitine influence on the dynamics of morphological and biochemical blood indices of broiler-chickens in the condition of industrial technology of chicken raisin

Legalization of criminal income using DeFi: typical schemes and risk indicators

Objective: to increase the effectiveness of countering the use of typical criminal money laundering schemes by identifying the technological and legal vulnerabilities of the DeFi infrastructure: decentralized exchanges, blockchain bridges, decentralized wallets, and privacy-enhanced currencies.Methods: general scientific (analysis and synthesis, induction and deduction, theoretical modeling, legal interpretation) and special methods of scientific cognition (structural-functional, constructive, situational, innovative, target-oriented, program-target, and risk-oriented).Results: the main trends in the development of money laundering using decentralized finance were outlined; the determinative significance of DeFi technological characteristics in the genesis of money laundering was revealed; the main types of money laundering using decentralized finance were identified; the schemes of committing crimes were studied and the criminogenic potential of DeFi infrastructure (decentralized exchanges, blockchain bridges, mixers, privacy-enhanced tokens, etc.) was assessed.Scientific novelty: it is proposed to consider money laundering using DeFi as a special type of digital financial crime. The article proposes the author’s typology of money laundering, substantiates the idea that the matrix of traditional financial regulation and AML standards cannot be applied to decentralized finance. It is argued that prevention of money laundering using decentralized finance should be carried out in close connection with the identification of risk indicators and the development of effective control measures at the points of entry of criminal incomes to centralized exchanges.Practical significance: the analysis of typical mechanisms of money laundering using DeFi allows a systematic approach to the organization of early crime prevention and can potentially become the basis to develop recommendations for financial intelligence and monitoring services

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

Changes in heart rate variability influenced by hyperventilation and evoked psychoemotional states

Introduction: This study aimed to investigate ventilatory correlates of conditioned psychoemotional states - responses to fear, anxiety and restful states and heart rate variability. Respiratory, end-tidal carbon dioxide pressure (PetC02) and heart rate changes were studied in a differential fear and anxiety conditioning paradigm as well as in a restful state paradigm. We aimed to find out which kind of images, evoking a corresponding psychoemotional state, induce changes in respiration, causing hyperventilation and in heart rate variability. Medically unexplained dyspnea refers to a condition characterized by a sensation of dyspnea and is typically applied to patients presenting with anxiety and hyperventilation without underlying cardiopulmonary pathology. We were interested to know how anxiety triggers hyperventilation and elicits subjective symptoms in those patients. Using an imagery paradigm, we investigated the role of fearful imagery in provoking hyperventilation and in eliciting symptoms, specifically dyspnea and heart rate variability as well as the role of restful psychoemotional state. Methods: Twenty-eight patients with medically unexplained dyspnea matched for age and gender were exposed to scripts and asked to imagine both fearful and restful scenarios of images, while end-tidal PC 02 (PetCO,) and breathing frequency were recorded and subjective symptoms evaluated. The subject who had PetC02 falling more than 5 mmHg from baseline and persisting at this low level for more than 15 seconds in the imagination was regarded as a hyperventilation responder. Parallel was registrated cardiac activity. Results: In patients with medically unexplained dyspnea, imagination of fearful scenarios, induced anxious feelings, and provoked a significant fall in PetCO, (P<0.05). Breathing frequency tended to increase. 18 out of 28 patients were identified as hyperventilation responders compared to 8 out of 28 normal subjects without hyperventilation(P<0.01). The patients reported symptoms of dyspnea, palpitation or rapid heart beat in the same fearful script imagery. Additionally, PetCO, fall was significantly correlated with the intensity of dyspnea and palpitation experienced during the mental imagery on one hand, and with anxiety symptoms on the other. Restful scenarios of images induced also hyperventilation but in comparison fearful scenarios of images they differ qualitative. Heart rate variability changed in case of hyperventilation in correlation with restful scenarios of images. Conclusions: Fearful imagery provokes hyperventilation and induces subjective symptoms of dyspnea and palpitation in patients with medically unexplained dyspnea. Restful imagery provokes hyperventilation and induces changes in heart rate variability by increasing. The difference between the both hyperventilatory states is that in case of fearful imagery we observe tachypnoe and in case of restful imagery - hyperpnoe

Evidence for two-dimensional nucleation of superconductivity in MgB2_{2}

According to the crystal structure of MgB$_{2}$ and band structure calculations quasi-two-dimensional (2D) boron planes are responsible for the superconductivity. We report on critical fields and resistance measurements of 30 nm thick MgB$_{2}$ films grown on MgO single crystalline substrate. A linear temperature dependence of the parallel and perpendicular upper critical fields indicate a 3D-like penetration of magnetic field into the sample. Resistivity measurements, in contrast, yield a temperature dependence of fluctuation conductivity above T$_{c}$ which agrees with the Aslamazov-Larkin theory of fluctuations in 2D superconductors. We consider this finding as an experimental evidence of two-dimensional nucleation of superconductivity in MgB$_{2}$.Comment: 5 RevTex pages, 3 PostScript Figures ZIPed in archive Sidoren.zip. Submitted to EuroPhys. Lett. December 3, 200

Beyond Moore's technologies: operation principles of a superconductor alternative

The predictions of Moore's law are considered by experts to be valid until 2020 giving rise to "post-Moore's" technologies afterwards. Energy efficiency is one of the major challenges in high-performance computing that should be answered. Superconductor digital technology is a promising post-Moore's alternative for the development of supercomputers. In this paper, we consider operation principles of an energy-efficient superconductor logic and memory circuits with a short retrospective review of their evolution. We analyze their shortcomings in respect to computer circuits design. Possible ways of further research are outlined.Comment: OPEN ACCES

Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling

Recent theoretical studies of topologically nontrivial electronic states in Kondo insulators have pointed to the importance of spin-orbit coupling (SOC) for stabilizing these states. However, systematic experimental studies that tune the SOC parameter $\lambda_{\rm{SOC}}$ in Kondo insulators remain elusive. The main reason is that variations of (chemical) pressure or doping strongly influence the Kondo coupling $J_{\text{K}}$ and the chemical potential $\mu$ -- both essential parameters determining the ground state of the material -- and thus possible $\lambda_{\rm{SOC}}$ tuning effects have remained unnoticed. Here we present the successful growth of the substitution series Ce$_3$Bi$_4$(Pt$_{1-x}$Pd$_x$)$_3$ ($0 \le x \le 1$) of the archetypal (noncentrosymmetric) Kondo insulator Ce$_3$Bi$_4$Pt$_3$. The Pt-Pd substitution is isostructural, isoelectronic, and isosize, and therefore likely to leave $J_{\text{K}}$ and $\mu$ essentially unchanged. By contrast, the large mass difference between the $5d$ element Pt and the $4d$ element Pd leads to a large difference in $\lambda_{\rm{SOC}}$, which thus is the dominating tuning parameter in the series. Surprisingly, with increasing $x$ (decreasing $\lambda_{\rm{SOC}}$), we observe a Kondo insulator to semimetal transition, demonstrating an unprecedented drastic influence of the SOC. The fully substituted end compound Ce$_3$Bi$_4$Pd$_3$ shows thermodynamic signatures of a recently predicted Weyl-Kondo semimetal.Comment: 6 pages, 5 figures plus Supplemental Materia