Phase transformation B1 to B2 in TiC, TiN, ZrC and ZrN under pressure

Phase stability of various phases of MX (M = Ti, Zr; X = C, N) at equilibrium and under pressure is examined based on first-principles calculations of the electronic and phonon structures. The results reveal that all B1 (NaCl-type) MX structures undergo a phase transition to the B2-structures under high pressure in agreement with the previous total-energy calculations. The B1-MX structures are dynamically stable under very high pressure (210-570 GPa). The pressure-induced B2 (CsCl-type) MC phases are dynamically unstable even at high pressures, and TiN and ZrN are found to crystallize with the B2-structure only at pressures above 55 GPa. The first-order B1-to-B2 phase transition in these nitrides is not related to the softening of phonon modes, and the dynamical instability of B2-MX is associated with a high density of states at the Fermi level.Comment: 9 pages, 4 figure

Development of personnel technologies in the customs system of the Russian Federation

In the paper, the authors study the main reasons for introducing economic sanctions against the Russian Federation and how to counteract them. At the same time, the current situation requires intensified development of the international business to modernize the Russian economy. For this, it has become imperative to understand the role and place of the customs of the Russian Federation in this process and to further improve the approaches to staffing a federal executive body – the Federal Customs Service (FCS of Russia) in terms of selecting highly skilled personnel. In the end, a unified methodology for evaluating candidates taking civil service postsin the customs bodies is propose

Comamonas testosteroni strain TI as a potential base for a microbial sensor detecting surfactants

Strain Comamonas testosteroni TI, capable of degrading the nonionic surfactant (NIS) nonylphenolethoxylate (OP-10), was used for constructing a pilot cellular biosensor. The lower NIS detection limit for the biosensor was 0.25 mg/l. We studied the substrate specificity of the biosensor with respect to a wide range of organic compounds: surfactants, polyaromatic compounds (PAC), carbohydrates, alcohols, etc. It was shown that the biosensor based on Comamonas testosteroni TI did not respond to glucose, which was an advantage over the formerly described biosensor based on Pseudomonas rathonis T. The amplitude of the sensor response remained stable for 10 days

Evaluation of substrate specificity of biosensor models based on strains degrading polycyclic aromatic compounds

Models of microbial biosensors based on 11 strains of degraders of surface-active substances (SASS) and polycyclic aromatic hydrocarbons (PAHs) were studied. Substrate specificity, sensitivity, and stability of biosensor models were comparatively evaluated

Alternative Method of Surgical Treatment of Post-Infarction Left Ventricular Free Wall Rupture. Case Report

Acute myocardial infarction (AMI) is one of the causes of death in developed countries, despite the latest medical technologies. AMI is usually accompanied by numerous fatal complications. One of these complications is left ventricular free wall rupture (LVFWR). Myocardial rupture after AMI can occur from 1 day to 3 weeks after the infarction. Most ruptures occur 3-5 days after a heart attack. Left ventricular free wall rupture requires only emergency surgical intervention, which in most cases consists in applying U-shaped sutures or wrapping sutures using Teflon patch. The aim. To demonstrate an example of alternative surgical tactics and intraoperative management of a patient with myocardial infarction complicated by rupture of the free wall of the heart with the transition to cardiogenic shock. Case report. We presented the clinical case of patient V., 72 years old, who was delivered by ambulance on January 10, 2023 to the intensive care department of the National Amosov Institute of Cardiovascular Surgery (Kyiv, Ukraine). Main diagnosis: ischemic heart disease, acute coronary syndrome with ST-elevation myocardial infarction, cardiogenic shock. Conclusion. The only effective method of treatment of rupture of the free wall of the heart is surgical intervention. Using a sandwich patch with resection of necrotic areas of the myocardium and U-shaped sutures with Teflon patch passed from the side of the left ventricular cavity through the myocardium in the peri-infarct zone and through a patch from a vascular prosthesis allows hermetically sew up the LVFWR

Cosmological scalar fields that mimic the ΛCDM\Lambda CDM cosmological model

We look for cosmologies with a scalar field (dark energy without cosmological constant), which mimic the standard $\Lambda CDM$ cosmological model yielding exactly the same large-scale geometry described by the evolution of the Hubble parameter (i.e. photometric distance and angular diameter distance as functions on $z$). Asymptotic behavior of the field solutions is studied in the case of spatially flat Universe with pressureless matter and separable scalar field Lagrangians (power-law kinetic term + power-law potential). Exact analytic solutions are found in some special cases. A number of models have the field solutions with infinite behavior in the past or even singular behavior at finite redshifts. We point out that introduction of the cosmological scalar field involves some degeneracy leading to lower precision in determination of $\Omega_m$. To remove this degeneracy additional information is needed beyond the data on large-scale geometry.Comment: VIII International Conference "Relativistic Astrophysics, Gravitation and Cosmology": May 21-23, 2008, Kyiv, Ukrain

Методичні вказівки до вивчення курсу "Хімія"

Методичний посібник містить план лабораторного практикуму, методичні розробки лабораторних робіт. Для самоконтролю при підготовці до модульних контрольних робіт та лабораторних занять подаються окремі теоретичні питання та ряд вправ для самостійного розв’язування.Для студентів біологічного факультету (напрям підготовки: 6.090103 – “Лісове і садово-паркове господарство”) денної форми навчання, викладачів та лаборантів, які проводять лабораторні й семінарські заняття

МОДЕЛИ ИННОВАЦИОННОГО РАЗВИТИЯ УНИВЕРСИТЕТОВ В РОССИИ

The key models of innovation development of universities in Russia, created during the reform of higher education since the second half ofprevious decade are exposed. Authors describe the main particular qualities of these models and review the results of their activity. Newest concepts of university models are exposed in order to support the realization of National technological initiative.В статье представлены ключевые модели инновационного развития университетов в России, появившиеся с момента начала реформы системы высшего образования во второй половине 2000-х годов. Отмечаются ключевые особенности данных моделей, а также представлены ключевые результаты их деятельности за прошедший период. Представлены новейшие концепции моделей развития инновационной деятельности в университетах с целью поддержки реализации дорожных карт новых рынков Национальной технологической инициативы (НТИ), предложенной Агентством стратегических инициатив

СОВРЕМЕННЫЕ ИНСТРУМЕНТЫ ИННОВАЦИОННОЙ ПОЛИТИКИ ГОСУДАРСТВА В ОТНОШЕНИИ РОССИЙСКИХ ВУЗОВ

In the paper the decision of the Russian Government on the formation and development of innovative capacity of national institutions. We also present results of the decisions taken since the late 1990s. There have been both successes and difficulties of reforming the university building, which combines education, research and implementation of innovative solutions into practiceОкончание. Начало в номере 12В статье излагаются решения Правительства России по формированию и развитию инновационного потенциала отечественных учебных заведений. Также приведены результаты реализации принятых постановлений в период с конца 1990-х годов. Отмечаются как успехи, так и трудности реформирования вузовского потенциала, сочетающего обучение, исследования и внедрение инновационных решений в практику

Gravitational Ionization: A Chaotic Net in the Kepler System

The long term nonlinear dynamics of a Keplerian binary system under the combined influences of gravitational radiation damping and external tidal perturbations is analyzed. Gravitational radiation reaction leads the binary system towards eventual collapse, while the external periodic perturbations could lead to the ionization of the system via Arnold diffusion. When these two opposing tendencies nearly balance each other, interesting chaotic behavior occurs that is briefly studied in this paper. It is possible to show that periodic orbits can exist in this system for sufficiently small damping. Moreover, we employ the method of averaging to investigate the phenomenon of capture into resonance.Comment: REVTEX Style, Submitte