Migration factor in the context of national safety: Russian and foreign experience in the XXI century

© Serials Publications. The relevance of the problem is caused by the fact that in the XXI century globalization is one of the key processes in international politics, which directly promotes strengthening of migration flows. The aim of article is to study a relevant problem of national security, namely its migratory aspect operating under conditions of post-bipolar system of the international relations. The leading approach to the research of this problem is systematization of factors that allow using various scientific methods and techniques, mutually supplementing and combining themselves when investigating the international problems (including migratory processes). The main result of the research is the comprehensive study of the migratory factor in the context of national stability. On the one hand, it promotes the growth of human resources potential and stimulates economic growth in different branches of economy. On the other hand, there are difficulties in cross-cultural interaction; the risks of conflicts on ethnic and religious basis are increasing. The most dangerous phenomenon, from the point of view of the national security, is illegal migration, which strengthens possible risks. Now the Russian Federation and other developed countries, such as the USA, France and Germany connect solution of migratory problems with implementation of the policy of national security. The article can be useful for the scholars studying Russian and foreign experience both positive and negative aspects in the field of migration policy

Long-lived photoinduced absorption in granular molybdenum disulfide thin films

© 2018 Institute of Physics Publishing. All rights reserved. We present results of the differential photoinduced absorption spectra investigation of the molybdenum disulfide nanogranular thin films. The films were produced by means of a sulfurization of pre-deposited by magnetron sputtering thin molybdenum films. It has been shown that photoexcitation with the light quanta with the energy higher than the bandgap leads to a modification of the absorption spectra in the visible range. Possible nature of the photoinduced absorption spectra will be discussed

Magnetic and Mössbauer effect studies of ZnO thin film implanted with iron ions to high fluence

© Published under licence by IOP Publishing Ltd.We present the results of magnetic and Mössbauer effect studies of zinc oxide thin film obtained by RF magnetron sputtering and implanted with 40 keV iron ions to a fluence of 1.5•1017 ion/cm2. As-implanted and post-annealed sample shows ferromagnetic properties at room temperature and consists of paramagnetic and ferromagnetic phases according to Mössbauer spectroscopy

Novel Azo-Dyes-Modified Isatin Derivatives: Synthesis, UV/VIS Spectroscopic, and Electrochemical Study

© 2016 Wiley-VHCA AG, ZürichA high-yield and simple synthesis of certain aminomethylisatins bearing dye fragments via the Mannich reaction of isatin with amino-containing azobenzenes was reported. It was found that the absence of electron-donating groups in azo-dye molecule prevents aminomethylation of isatin. The effect of the incorporation of an isatin moiety with an azobenzene dye in one molecule on its absorption and electrochemical behavior was studied using UV spectroscopy and cyclic voltammetry

Synthesis and properties of the molybdenum and tungsten disulfide thin films

© Published under licence by IOP Publishing Ltd.In the paper results of thin film synthesis and primary characterization of molybdenum and tungsten disulfides are presented. The synthesis is performed by means of the high-temperature sulfurization of the metallic Mo and W films in the flow of argon. Chemical and phase compositions and morphology of thin films are reported. Optical transmission and Raman spectra are presented and discussed

Reactivity of phosphine oxide H<inf>3</inf>PO in the reactions with ketones

© 2016, Springer Science+Business Media New York.The reactivity of the electrochemically generated phosphine oxide H3PO towards ketones (acetone, ethyl methyl ketone, methyl n-propyl ketone, and tert-butyl methyl ketone) has been studied. It was found that this reaction led to the formation of mono- and bis(hydroxyalkyl)phosphine oxides of the formulas RRĆ(OH)P(O)H2 and [RRĆ(OH)]2P(O)H (R = Me; R´ = Me, Et, Pr) and represents the first example of the P—C bond formation involving the intermediate H3PO

Numerical Modeling of Dynamics of Temperature and Dielectric Parameters of Source Rock Under Microwave Heating

Приведены результаты физического и математического моделирования распределения температуры в образце нефтематеринской породы при одностороннем микроволновом облучении. Разработан и протестирован метод косвенного определения зависимости диэлектрических свойств образца от температуры по экспериментальным данным температурной динамики во время электромагнитного нагрева. Метод заключается в решении обратной задачи для установления температурной зависимости коэффициента поглощения электромагнитной волны, который зависит от диэлектрических свойств. Было создано две вариации модели. В одной из них коэффициент поглощения считался постоянным и однородным, а его значение было получено валидацией модели экспериментальными данными. Во второй имел место учёт зависимости коэффициента поглощения от температуры, математическая форма которой была определена решением обратной задачи. Сопоставление экспериментальных данных с результатами реализации этих моделей показало увеличение их количественной сходимости при применении разработанного методаResults of physical and mathematical modeling of temperature distribution in an oil source rock sample under single-sided microwave irradiation are presented. A method for indirect determination of the dependence of dielectric properties of a sample on temperature using experimental data on temperature dynamics during electromagnetic heating has been developed and tested. The method consists in solving an inverse problem to establish the temperature dependence of the absorption coefficient of an electromagnetic wave, which depends on dielectric properties. Two variations of the model were created. In one of them, the absorption coefficient was assumed to be constant and homogeneous, and its value was obtained by validating the model by experimental data. The second takes into account the dependence of the absorption coefficient on temperature, the mathematical form of which was determined by solving the inverse problem. Comparison of experimental data with the results of the implementation of these models showed an increase in their quantitative convergence when using the developed metho

Polymorphism and thermodynamic properties of chloro(cyclopentadienyl)bis(triphenylphosphine)ruthenium(II) complex

© 2016 Elsevier B.V. All rights reserved. A new crystalline polymorph of known chloro(cyclopentadienyl)bis(triphenylphosphine)ruthenium(II) complex [RuCl(PPh3)2(η5-C5H5)] was obtained and characterized by various analytical methods including single-crystal and powder X-ray diffraction (XRPD) and differential scanning calorimetry (DSC) in combination with thermo-gravimetric analysis (TG-DSC). The obtained crystals of new polymorph are monoclinic, space group P21/n, with a = 11.125(4), b = 19.184(6), c = 15.946(5) Å, α = 90, β = 100.174(5), γ = 90, and Z = 4. It has been found that real melting point of the complex (M.p. = 252-253 °C) can be determined only in inert atmosphere while an apparent melting is observed in the range 142-150 °C due oxygen promoted oxidative dissociation of triphenylphosphine ligand