354 research outputs found

    Comparison and assessment of innovation projects for achieving sustainable development in the small manufacturing business environment

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    The paper presents a new model for sustainable development, requiring less resources and applicable to small companies. It is applied for typical manufacturing products made in small batches. Production diagrams and material flow calculations are presented. The results are found to be satisfactory in terms of the necessity to take the right decision for choosing sustainable products

    PECULIARITIES OF THE EPIDEMIC PROCESS OF EPIDEMIC PAROTITIS UNDER THE CONDITIONS OF MASS IMMUNOPROPHYLAXIS

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    Some specific features of the mumps epidemic process under the conditions of mass immunoprevention were analyzed. Incidence rates were higher when there was a remoteness of the primary immunization by live parotitis vaccine. Certain opportunities for amending the epidemic control with this vaccine to avoid infection were emphasized

    Cultural brokering with Syrian refugee families with young children: an exploration of challenges and best practices in psychosocial adaptation

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    This study examined the challenges and critical psychosocial needs of Syrian refugee families with young children in Western Canada, and the role of cultural brokering in facilitating their psychosocial adaptation. Using a community-based participatory research approach and critical incident method, the study involved nine Arabic-speaking cultural brokers who were working with Syrian refugee families using holistic supports during early resettlement. Data collected through focus groups and semi-structured interviews are presented in five illustrative case studies, and reveal that Syrian families struggled with feeling safe and secure in Canada, adjusting to the changing roles in the family, and trying to find meaning in their lives. These struggles were attributed to families’ overall challenges navigating various domains of integration (i.e., health, social services, and education), resulting in a heavy reliance on cultural brokers for social linking and bonding activities (Ager & Strang, 2008), including connecting families to needed supports and helping family members build relationships with one another. Challenges faced by families mapped onto the five psychosocial needs of Silove’s (2013) Adaptation after Persecution and Trauma (ADAPT) conceptual framework as well as most of the core domains of Ager and Strang’s (2008) Social Integration framework. This study provides evidence for the use of both of these frameworks in further studies involving Syrian refugee populations; they proved useful for understanding how families can develop necessary skills to engage on their own in linking activities with various Canadian institutions and bridging activities with communities at large

    EXPERIENCE OF TAXATION OF REAL ESTATE OF INDIVIDUALS IN FOREIGN COUNTRIES AND ITS APPLICATION IN RUSSIA

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    Approaches to the formation of the value of objects of taxation of real estate of individuals in foreign countries and the establishment of tax rates have been examined. An analysis of tax revenues on real estate of individuals in highly developed countries has been carried out. General trends in property taxation of individuals have been identified. Basic provisions, on which modern systems of real estate taxation of individuals are based, have been formulated. Problems of real property taxation in Russia have been identified. Ways of determining the tax base taking into account the world experience and Russian reality have been proposed. Proposals for the application of tax rates and the implementation of the principle of justice have been elaborated

    METHOD OF ESTIMATION OF ENVIRONMENTAL HAZARD OF URBAN LAND USING FOR VITAL ACTIVITY OF POPULATION

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    It is noted that the global updating of the ecological problems at the end of the XX - the beginning of the XXI centuries, the undeniable importance of the ecological component of human existence, causes the urgent need for a balanced, holistic, integrated approach to the analysis and solution of issues of ensuring the ecological safety of the vital activities of the population, including the city. At the same time, at the legislative level, environmental safety is identified as one of the priority tasks in the state policy of Ukraine in order to achieve sustainable development. It is proved that the provision of environmental safety remains the main way of solving ecological problems, which guarantees citizens the development and living in harmony with the environment and opens up new opportunities for other forms of activity in the field of nature management, in particular, political, economic, social, etc. The methodical approach to an estimation of ecological danger of urban land use for vital activity of the population and typification of land use of green plantings is grounded. An assessment of the state of ecological danger for the city of Kiev is given. On the basis of the proposed methodical approach, it is justified that today there are threats to the ecological stability of land use, and accordingly, environmental insecurity of land use, which indicates a lack of change in the structure of land use for many years

    Probing Spin-Charge Relation by Magnetoconductance in One-Dimensional Polymer Nanofibers

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    Polymer nanofibers are one-dimensional organic hydrocarbon systems containing conducting polymers where the non-linear local excitations such as solitons, polarons and bipolarons formed by the electron-phonon interaction were predicted. Magnetoconductance (MC) can simultaneously probe both the spin and charge of these mobile species and identify the effects of electron-electron interactions on these nonlinear excitations. Here we report our observations of a qualitatively different MC in polyacetylene (PA) and in polyaniline (PANI) and polythiophene (PT) nanofibers. In PA the MC is essentially zero, but it is present in PANI and PT. The universal scaling behavior and the zero (finite) MC in PA (PANI and PT) nanofibers provide evidence of Coulomb interactions between spinless charged solitons (interacting polarons which carry both spin and charge)

    Wigner crystallization in a polarizable medium

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    We present a variational study of the 2D and 3D Wigner crystal phase of large polarons. The method generalizes that introduced by S. Fratini,P.\ Qu{\'{e}}merais [Mod. Phys. Lett. B {\bf 12} 1003 (1998)]. We take into account the Wigner crystal normal modes rather than a single mean frequency in the minimization procedure of the variational free energy. We calculate the renormalized modes of the crystal as well as the charge polarization correlation function and polaron radius. The solid phase boundaries are determined via a Lindemann criterion, suitably generalized to take into account the classical-to-quantum cross-over. In the weak electron-phonon coupling limit, the Wigner crystal parameters are renormalized by the electron-phonon interaction leading to a stabilization of the solid phase for low polarizability of the medium. Conversely, at intermediate and strong coupling, the behavior of the system depends strongly on the polarizability of the medium. For weakly polarizable media, a density crossover occurs inside the solid phase when the renormalized plasma frequency approaches the phonon frequency. At low density, we have a renormalized polaron Wigner crystal, while at higher densities the electron-phonon interaction is weakened irrespective of the {\it bare} electron-phonon coupling. For strongly polarizable media, the system behaves as a Lorentz lattice of dipoles. The abrupt softening of the internal polaronic frequency predicted by Fratini and Quemerais is observed near the actual melting point only at very strong coupling, leading to a possible liquid polaronic phase for a wider range of parameters.Comment: 24 pages, 13 figures v1.

    Red Blood Cell Membrane Conductance in Hereditary Haemolytic Anaemias

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    Electrophysiology; Haemolytic anemia; Hereditary spherocytosisElectrofisiologia; Anemia hemolítica; Esferocitosi hereditariaElectrofisiologia; Anèmia hemolítica; Esferocitosi hereditàriaCongenital haemolytic anaemias are inherited disorders caused by red blood cell membrane and cytoskeletal protein defects, deviant hemoglobin synthesis and metabolic enzyme deficiencies. In many cases, although the causing mutation might be known, the pathophysiology and the connection between the particular mutation and the symptoms of the disease are not completely understood. Thus effective treatment is lagging behind. As in many cases abnormal red blood cell cation content and cation leaks go along with the disease, by direct electrophysiological measurements of the general conductance of red blood cells, we aimed to assess if changes in the membrane conductance could be a possible cause. We recorded whole-cell currents from 29 patients with different types of congenital haemolytic anaemias: 14 with hereditary spherocytosis due to mutations in α-spectrin, β-spectrin, ankyrin and band 3 protein; 6 patients with hereditary xerocytosis due to mutations in Piezo1; 6 patients with enzymatic disorders (3 patients with glucose-6-phosphate dehydrogenase deficiency, 1 patient with pyruvate kinase deficiency, 1 patient with glutamate-cysteine ligase deficiency and 1 patient with glutathione reductase deficiency), 1 patient with β-thalassemia and 2 patients, carriers of several mutations and a complex genotype. While the patients with β-thalassemia and metabolic enzyme deficiencies showed no changes in their membrane conductance, the patients with hereditary spherocytosis and hereditary xerocytosis showed largely variable results depending on the underlying mutation

    Large scale numerical investigation of excited states in poly(phenylene)

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    A density matrix renormalisation group scheme is developed, allowing for the first time essentially exact numerical solutions for the important excited states of a realistic semi-empirical model for oligo-phenylenes. By monitoring the evolution of the energies with chain length and comparing them to the experimental absorption peaks of oligomers and thin films, we assign the four characteristic absorption peaks of phenyl-based polymers. We also determine the position and nature of the nonlinear optical states in this model.Comment: RevTeX, 10 pages, 4 eps figures included using eps
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