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In this paper, we consider the direct and inverse problems of the description of lattice positive random fields by various systems of finite-dimensional (as well as one-point) probability distributions parameterized by boundary conditions. In the majority of cases, we provide necessary and sufficient conditions for the system to be a conditional distribution of a (unique) random field. The exception is Dobrushin-type systems for which only sufficient conditions are known. Also, we discuss possible applications of the considered systems. [ABSTRACT FROM AUTHOR]

The aim of the presented research was to study and assess Total Suspended Particle mitigation capacity of Fraxinus excelsior and Platanus orientalis - the two most widespread tree species in Yerevan. It turned out that in the conditions of Yerevan, both tree species show high efficiency of TSP mitigation. In this regard, we recommend using P. orientalis and F. excelsior in Yerevan green infrastructure as wide as possible, especially along the highways, in the industrial areas of the city, and in areas with intensive construction. [ABSTRACT FROM AUTHOR]

The article considers the results of the study on community structure and ecosystem services of trees of the first section of Circular Park - one of the largest parks in Yerevan, Armenia. Totally 757 trees, representing 27 species were identified. The results of the tree condition assessment indicated that 55% of the examined trees were in poor condition. Across all trees, the most common diameter at breast height (hereafter referred to as DBH) and height respectively fell within the 16-30 cm and 6-11 m size classes, which reflects the presence of a high number of middle-aged trees. The data obtained via i-Tree canopy showed that the combined air pollution removal ecosystem service for trees was valued at approximately $1.290, for carbon storage and sequestration - $32,815. [ABSTRACT FROM AUTHOR]

We introduce sufficiently wide classes of non-linear functionals preserving normal (Gaussian) distribution and establish various conditions under which a sequence of such functionals is asymptotically normal. As a consequence, we obtain a generalization and sharpening of known results on the central limit theorem for weighted sums (linear functionals) of independent random variables. [ABSTRACT FROM AUTHOR]

Forced vibrations of a two-layer orthotropic shell, with incomplete contact conditions between layers, when the upper face of the shell is free and the lower one is subjected to a dynamic action are considered. By an asymptotic method, the solution of the corresponding dynamic equations and correlations of a 3D problem of elasticity theory is obtained. The amplitudes of forced vibrations are determined, and resonance conditions are established. [ABSTRACT FROM AUTHOR]

Thermal degradation of lignin under two reaction regimes (pyrolysis in N2 and oxidative pyrolysis in 4% O2 in N2) has been investigated in a tubular, isothermal, flow-reactor over the temperature range 200–900 °C at a residence time of 0.2 s. Two experimental protocols were adopted: (1) Partial pyrolysis in which the same lignin sample was continuously pyrolyzed at each temperature and (2) conventional pyrolysis, in which new lignin samples were pyrolyzed at each pyrolysis temperature. The results identified common relationships between the two modes of experiments, as well as some differences. The majority of products from partial pyrolysis peaked between 300 and 500 °C, whereas for conventional pyrolysis reaction products peaked between 400 and 500 °C. The principal products were syringol (2,6-dimethoxy phenol), guaiacol (2-methoxy phenol), phenol, and catechol. Of the classes of compounds analyzed, the phenolic compounds were the most abundant, contributing over 40% of the total compounds detected. Benzene, styrene, and p-xylene were formed in significant amounts throughout the entire temperature range. Interestingly, six ringed polycyclic aromatic hydrocarbons were formed during partial pyrolysis. Oxidative pyrolysis did not result in large differences from pyrolysis; the main products still were syringol, guaiacol, phenol, the only significant difference being the product distribution peaked between 200 and 400 °C. For the first time, low temperature matrix isolation electron paramagnetic resonance was successfully interfaced with the pyrolysis reactor to elucidate the structures of the labile reaction intermediates. The EPR results suggested the presence of methoxyl, phenoxy, and substituted phenoxy radicals as precursors for formation of major products; syringol, guaiacol, phenols, and substituted phenols. [ABSTRACT FROM AUTHOR]

The article provides information related to new guidelines by European Society of Cardiology for syncope treatment which is a transient loss of consciousness due to transient cerebral hypoperfusion. The article also reports on reflex syncope and provides a pathological classification of the principle causes of syncope. As stated, cardiac evaluation should be recommended to patients with structural heart disease or abnormal electrocardiograph.

Test data on the selective reagent modes at bulk flotation cycle and modified carboxymethylcellulose (CMC) at a selection cycle for the bulk copper-molybdenum concentrate. The selected reagent mode at a bulk flotation cycle with industrial kerosene and Beraflot as collectors and OPSB as a frother made it possible to recover 87 % of copper and 82 % of molybdenum into a rough bulk concentrate. Tests with CMC application at the selection cycle revealed a potential opportunity to reduce 1.5–2.0 times the summary sodium sulfide consumption, to cut down running costs of pulp and depressant heating, and to improve molybdenum recovery with no negative effect on other parameters of the bulk concentrate selection. [ABSTRACT FROM AUTHOR]

Expanded, 45 reaction, and core, 12 reaction, kinetic models have been developed that account for the major features in the homogeneous formation of polychlorinated dibenzo-p-dioxins (PCDD) from the oxidation of 2,4,6-trichlorophenol (P). The expanded and core schemes provide good agreement between experimental and calculated yields of PCDDs using the CHEMKIN combustion package or the React kinetic program, respectively. Steady-state approximations of the reaction kinetic models including radical–molecule and radical–radical formation pathways of PCDD, as well as oxidative destruction pathways of chlorinated phenoxyl radicals, reveal a competition between reactions of chlorinated phenoxyl radicals with chlorinated phenols, recombination reactions of chlorinated phenoxyl mesomers, and destruction/decomposition of phenoxyl radicals. [Copyright &y& Elsevier]

The bromination of 6,7-dihydro-1 H-cyclopenta[ d]pyrimidine-2,4(3 H,5 H)-dione ( 1) resulted in the substitution in the aliphatic ring. The reaction of this product with different N-nucleophiles gives new derivatives of the starting compound. The direction of the substitution in the alicycle was established by studying further transformations of some of these compounds by means of NMR spectroscopy. [ABSTRACT FROM AUTHOR]

The article presents chemical equations related to the synthesis of 6,7-dihydro-1H-cyclopenta[d]pyrimidine-2,4(3H,5H)-dione derivatives containing the substituted aliphatic ring published in the journal "Russian Chemical Bulletin" in 2013.

Ce travail relate l'expérience de trois missions chirurgicales françaises dans la prise en charge des blessés lors du conflit armé au Haut-Karabakh qui s'est déroulé du 27 septembre au 10 novembre 2020. Trois missions chirurgicales ont été effectuées en Arménie entre octobre 2020 et janvier 2021. Les chirurgiens sont intervenus dans différents hôpitaux, à différents moments du conflit et sur des lésions de guerre variées. La présence d'un chirurgien plasticien s'est révélée indispensable dans la prise en charge des blessés de guerre notamment en urgence différée et en secondaire. La prise en charge ortho-plastique proposée lors de ces missions a démontré son efficacité dans la reconstruction des membres. Ces missions ont permis d'introduire la technique de la membrane induite de AC Masquelet en Arménie. Nous avons évoqué, lors de notre passage au centre des brûlés d'Erevan, l'usage fort probable du phosphore blanc comme étiologie dans plusieurs dossiers analysés. Nous relatons l'expérience particulière de chirurgiens civils dans le cadre d'un conflit armé moderne. La présence d'un chirurgien plasticien s'est révélée indispensable dans la prise en charge des blessés de guerre et surtout dans leurs reconstructions secondaires. This work relates the experience of three French surgical missions in the care of the war wounded during the armed conflict in Nagorno Karabakh which took place from September 27 to November 10, 2020. Three surgical missions were carried out in Armenia between October 2020 and January 2021. Surgeons intervened in different hospitals, at different times of the conflict and on various war wounds. The presence of a plastic surgeon proved to be essential in the care of war wounded, especially in delayed emergency and secondary care. The ortho-plastic treatment offered during these missions has proven to be effective in the reconstruction of limbs. These missions made it possible to introduce the induced membrane technique of Masquelet AC in Armenia. During our visit to the Yerevan burn center, we mentioned the very probable use of white phosphorus as an etiology in several of the cases analyzed. We relate the particular experience of civilian surgeons in the context of a modern armed conflict. The presence of a plastic surgeon proved to be indispensable in the care of war wounded and especially in their secondary reconstructions. [ABSTRACT FROM AUTHOR]

The results of an experimental investigation of electron beam spectral distribution after interaction with external electromagnetic waves in an undulator are given. The initial electron energy was 12 MeV, external electromagnetic wave power was 50 MW, the wavelength being 10 μm. A helical 20-cm-long undulator with a period length of 9.5 mm was used. The dependence of spectral distribution maximum change on undulator magnetic field strength was measured. The results are in good agreement, with estimated findings taking into account the real parameters of the experimental setup. Electron energy maximum change was ± 20 keV which is a result of electron acceleration or deceleration by the electromagnetic wave in the undulator. [ABSTRACT FROM AUTHOR]