88 research outputs found

    Territorial identity of the population as a factor an consequence of social participation

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    The main objective of the article is to demonstrate the correlation between the lev el of territorial identity of the population and the development of social participation practices. The theory and methodology of the study is based on the works of foreign scientists T. Banini, R. Capello, U. Panzer, who prove the pronounced active position of the population with a high level of territorial identity, and on the concept of “the right to the city” by H. Lefebvre, presented in Russian realities in the works by I.A. Skalaban, E.S. Kochukhova, V.S. Martyanova, E. A. Terentyeva. The main hypothesis of the study: the population with a high level of territorial identity declares its “right to the city” through the practices of social participation, that are manifested mostly in the field of urban space planning, inclusion in the practices of participatory management. In turn, practices of social participation at the local level strengthen territorial identity and boost formation of the attachment to the place of residence. Information collection method: mass survey of the population of the city of Cherepovets, Vologda Region, based on a quota sampling of the population over 18 years old according to the gender and age structure of the city. According to the results of an empirical study, it was proved that the population with a higher level of territorial identity has a significantly greater presence of informal participation practices, especially those related to the transformation of urban space. The practices of helping behaviour are most clearly expressed and the involvement in the activities of public city organisations is more common. It was proved with the help of dispersion analysis that population groups with different levels of social participation practices statistically differ in terms of the level of territorial identity.</p

    Between the Eurasian and European subsystems: migration and migration policy in the CIS and Baltic Countries in the 1990s - 2020s

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    The article analyses migration from border countries (the so-called overlapping area) of two migration subsystems - Eurasian (centred in the Russian Federation) and European (the European Union) from 1991 to 2021 (before the recent events in Ukraine). A step-by-step analysis of the migration situation in the countries of the former USSR - Belarus, Latvia, Lithuania, Moldova, Ukraine and Estonia was conducted. The article examines bilateral and multilateral migration processes, analyses the main factors influencing their development and explores migration policy measures and their impact on the regulation of migration processes in the countries of the overlapping area. These countries, located between the two centres of major migration subsystems in Eurasia (Eurasian and European, or, in other words, between the Russian Federation and the core of the EU), are subject to their strong influence and 'competitive gravitation'. The strength of this gravitation depends not only on pull and push factors but also on the attractiveness and non-attractiveness of the migration policies prevailing in these migration subsystems at a given point in time

    EMR searching of quantum behavior of magnetic γ-Fe<inf>2</inf>O<inf>3</inf> nanoparticles encapsulated into poly(Propylene imine) dendrimer

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    © Kazan Federal University (KFU).The superparamagnetic γ-Fe2O3 nanoparticles (average diameter of 2.5 nm) encapsulated in poly(propylene imine) dendrimer have been investigated by electron magnetic resonance (EMR). EMR measurements have been recorded in perpendicular and parallel configurations in the wide temperature range (4.2-300 K). It has been shown that the model based on the spin value S = 30, corresponding to the total magnetic moment of the nanoparticle, can be used to interpret the experimental results and the proof of the quantum behavior of γ-Fe2O3 nanoparticles

    Optical properties and photoinduced superparamagnetism of γ-Fe<inf>2</inf>O<inf>3</inf> nanoparticles formed in dendrimer

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    © 2014 Elsevier Ltd. All rights reserved. We are presenting the joint investigation of the optical and photoinduced superparamagnetic properties of a single-domain γ-Fe2O3 nanoparticles (NPs) formed in poly(propylene imine) (PPI)-dendrimer. The optical absorption studies indicated direct allowed transition with the band gap (4.5 eV), which is blue-shift with respect to the value of the bulk material. The influence of pulsed laser irradiation on the superparamagnetic properties of γ-Fe2O3 NPs was studied by Electron paramagnetic resonance (EPR) spectroscopy. It has been shown that irradiation of the sample in vacuo and cooled in zero magnetic field to 6.9 K leads to the appearance of a new EPR signal, which decays immediately after the irradiation is stopped. We suppose that the generation of conduction band electrons by irradiation into the band gap of the γ-Fe2O3 changes the superparamagnetic properties of NPs

    Blue shift in optical absorption, magnetism and light-induced superparamagnetism in γ-Fe2O3 nanoparticles formed in dendrimer

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    © 2015, Springer Science+Business Media Dordrecht. Abstract: We are presenting the investigation of the optical, magnetic, and photoinduced superparamagnetic properties of single-domain γ-Fe2O3 nanoparticles (NPs) with diameters of about 2.5 nm formed in second-generation poly(propylene imine) dendrimer. The optical absorption studies indicated direct allowed transition with the band gap (4.5 eV), which is blue shift with respect to the value of the bulk material. Low-temperature blocking of the NPs magnetic moments at 18 K is determined by SQUID measurements. The influence of pulsed laser irradiation on the superparamagnetic properties of γ-Fe2O3 NPs was studied by EPR spectroscopy. It has been shown that irradiation of the sample held in vacuo and cooled in zero magnetic field to 6.9 K leads to the appearance of a new EPR signal, which decays immediately after the irradiation is stopped. The appearance and disappearance of this new signal can be repeated many times at 6.9 K when we turn on/turn off the laser. We suppose that the generation of conduction band electrons by irradiation into the band gap of the γ-Fe2O3 changes the superparamagnetic properties of NPs. Graphical Abstract: [Figure not available: see fulltext.]Features of the behavior of single-domain γ-Fe2O3 nanoparticles formed in dendrimer were found by UV-Vis and EPR spectroscopy: “blue” shift in optical absorption, a significant increase in the band gap width and variation of superparamagnetic properties under light irradiation

    Magnetic Properties of Novel Dendrimeric Iron(III) Complexes of the First Generation: EPR and Mössbauer Study

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    © 2016, Springer-Verlag Wien.The magnetic properties of novel liquid-crystalline dendrimeric iron(III) complexes of the first generation, [Fe(L2)]+X−, where L = 3,4,5-tri(tetradecyloxy) benzoyloxy-4-salicyliden-N′-ethyl-N-ethylenediamine and X = Cl, NO3 have been investigated for the first time by electron paramagnetic resonance (EPR) and Mössbauer spectroscopy in the wide (4–300 K) temperature range. It has been shown that each compound consists of two types of iron centers: low-spin (LS, S = 1/2) and high-spin (HS, S = 5/2). A partial thermally driven spin transition (S = 5/2 ↔ 1/2) was observed in these complexes. EPR showed that the LS and HS iron centers are coupled by weak antiferromagnetic interactions and most probably form a chain in the column. Mössbauer spectroscopy confirmed the existence of the LS and HS Fe(III) centers in the compounds, a partial spin crossover of approximately 2–8 % of the Fe(III) molecules and showed that the HS Fe(III) centers demonstrate the antiferromagnetc type of ordering at 5 K

    Detailed EPR study of spin crossover dendrimeric iron(III) complex

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    The unusual magnetic behavior of the first dendritic Fe3+ complex with general formula [Fe(L)2]+Cl -·H2O based on a branched Schiff base has been investigated by electron paramagnetic resonance (EPR) and Mössbauer spectroscopy. EPR displays that complex consists of the three types of magnetically active iron centers: one S = 1/2 low-spin (LS) and two S = 5/2 high-spin (HS) centers with strong low-symmetry and weak distorted octahedral crystal fields. Analysis of the magnetic behavior reflected by I versus T (where I is the EPR lines integrated intensity of the spectrum) demonstrates that the dendritic Fe3+ complex has sufficiently different behavior in three temperature intervals. The first (4.2-50 K) interval corresponds to the antiferromagnetic exchange interactions between LS-LS, LS-HS, and HS-HS centers. The appearance of a presumable magnetoelectric effect is registered in the second (50-200 K) temperature interval, whereas a spin transition process between LS and HS centers occurs in the third (200-330 K) one. The coexistence of the magnetic ordering, presumable magnetoelectric effect, and spin crossover in one and the same material has been detected for the first time. The Mössbauer spectroscopy data completely confirm the EPR results. © 2013 American Chemical Society

    КЛАСТЕРИЗАЦИЯ ЭКОНОМИКИ: ЗАРУБЕЖНЫЙ ОПЫТ РАЗВИТИЯ И ПЕРСПЕКТИВЫ РОССИИ

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    This paper examined the existing foreign experience of the clustering of economy, which is one of the modern trends of regional economic policy in different countries, which aimed not only at the socio-economic development, but also the innovation development of the regions. It was also identified a number of global trends in clustering economy, and some specific features of cluster policy in the Asia-Pacific region, which can be used in the creation of modern Russian practice of cluster initiatives. In addition, it was provided the analysis of the problematic aspects of clustering in the economic development ofRussia. В работе рассматривается существующий зарубежный практический опыт развития концепции кластеризации экономики, являющейся одним из современных направлений региональной экономической политики, направленной не только на активизацию социально-экономического, но и инновационного развития территорий. В ходе исследования выявлен ряд мировых тенденций кластеризации экономики, определены особенности кластерной политики в странах Азиатско-Тихоокеанского региона, которые могут быть использованы в российской практике создания современных кластерных инициатив. Проведен анализ проблемных аспектов и перспективных направлений кластеризации российской экономики. Результаты были получены в рамках выполнения государственного задания Минобрнауки России в сфере научной деятельности по Заданию № 26.1478.2014/К «Структурные преобразования экономики России посредством интеграционного встраивания в отраслевые рынки АТР»

    Hemodynamic criteria of the circulatory system in ethnic groups of students with different types of autonomic regulation of the heart rate

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    Under physiological conditions, the first years of university studies of the students of Arabic and African subgroups with MPAR and PPAR HR were characterized by toughness, low effectiveness of the system of blood circulation, increased peripheral vascular resistance, vascular TSC; Indian and Latino-American subgroups with MPAR HR revealed the weakness and low efficiency of the circulatory system, the optimal GPBC and cardiovascular TSC were revealed in Indian and Latino-American subgroups with MPAR HR, and subgroups with PPAR HR showed high endurance of the circulatory syste

    EPR detection of presumable quantum behavior of iron oxide nanoparticles in dendrimeric nanocomposite

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    © 2017 Elsevier B.V.The superparamagnetic γ-Fe2O3 nanoparticles (average diameter of 2.5 nm) encapsulated in poly(propylene imine) dendrimer have been investigated by Electron Magnetic Resonance (EMR). EMR measurements have been recorded in perpendicular and parallel configurations in the wide temperature range (4.2–300 K). It has been shown that the model based on the spin value S = 30, corresponding to the total magnetic moment of the nanoparticle, can be used to interpret the experimental results and the proof of the quantum behavior of γ-Fe2O3 nanoparticles
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