Kinetic Scalar Curvature Extended f(R)f(R) Gravity

In this work we study a modified version of vacuum $f(R)$ gravity with a kinetic term which consists of the first derivatives of the Ricci scalar. We develop the general formalism of this kinetic Ricci modified $f(R)$ gravity and we emphasize on cosmological applications for a spatially flat cosmological background. By using the formalism of this theory, we investigate how it is possible to realize various cosmological scenarios. Also we demonstrate that this theoretical framework can be treated as a reconstruction method, in the context of which it is possible to realize various exotic cosmologies for ordinary Einstein-Hilbert action. Finally, we derive the scalar-tensor counterpart theory of this kinetic Ricci modified $f(R)$ gravity, and we show the mathematical equivalence of the two theories.Comment: NPB Accepte

Economic aspects of local authorities functioning

© The authors. The relevance of the study on economic aspects of local authorities' functioning is due to their dual nature in the complex system of market relations. In this regard, this article is aimed at economic aspects' revealing of local authorities' functioning, as well as the disclosure of various interest levels' interaction in the system of municipal management. A leading approach in the study of this problem is the method of the effectiveness assessing of local authorities' functioning. The article presents the analysis of domestic researchers' different points of view in relation to the substantial characteristics of municipal economy, reveals the nature of the interaction of various interest levels in the system of municipal relations, discloses the duality of local authorities' position in the municipal system of economic relations, proposes a classification of business entities under the municipal economy, proves the specificity of the economic and moral relations in the system of local authorities. The article is valuable for researchers, teachers and students studying the problems of formation and development of the national municipal economy, research methods within the discipline "Economics of public (government) services", "Municipal economy", as well as specialists of local authorities who are concerned with the improvement and development of municipal economy

Chiral Cosmological Model of f(R) Gravity with a Kinetic Curvature Scalar

© 2019, Pleiades Publishing, Ltd. We consider modified f(R) gravity with a kinetic curvature scalar, which can be reduced to a chiral cosmological model of special kind. A detailed derivation is presented for the action of a chiral cosmological model as an equivalent to a gravitational model with higher derivatives with respect to the Ricci scalar using Lagrange multipliers and a transition from the Jordan frame to the Einstein one. The equations of the model are written in the spatially flat Friedmann-Robertson-Walker metric on the basis of the constructed chiral cosmological model. Examples of solutions are found, corresponding to a special choice of the field χ = χ* = const, and its fixed value χ0=−3/2ln2. For this value of χ0, in the case of the canonical inclusion of the kinetic component of the Ricci scalar, we have obtained a nonlinear second-order differential equation with respect to H, which is not amenable to analytic solution. Therefore we implement a transition to a noncanonical form of the kinetic term. Using a fixed value of χ0, an exact solution is obtained for power-law inflation. We have considered a transition from the de Sitter and power-law solutions specified in the Jordan frame to the Einstein frame for comparison with the results obtained in f(R) gravity with higher derivatives. It is proved that there is a Weyl conformal transformation which transforms the de Sitter and power-law solutions in one frame to similar solutions in the other

Chiral Cosmological Model of f(R) Gravity with a Kinetic Curvature Scalar

© 2019, Pleiades Publishing, Ltd. We consider modified f(R) gravity with a kinetic curvature scalar, which can be reduced to a chiral cosmological model of special kind. A detailed derivation is presented for the action of a chiral cosmological model as an equivalent to a gravitational model with higher derivatives with respect to the Ricci scalar using Lagrange multipliers and a transition from the Jordan frame to the Einstein one. The equations of the model are written in the spatially flat Friedmann-Robertson-Walker metric on the basis of the constructed chiral cosmological model. Examples of solutions are found, corresponding to a special choice of the field χ = χ* = const, and its fixed value χ0=−3/2ln2. For this value of χ0, in the case of the canonical inclusion of the kinetic component of the Ricci scalar, we have obtained a nonlinear second-order differential equation with respect to H, which is not amenable to analytic solution. Therefore we implement a transition to a noncanonical form of the kinetic term. Using a fixed value of χ0, an exact solution is obtained for power-law inflation. We have considered a transition from the de Sitter and power-law solutions specified in the Jordan frame to the Einstein frame for comparison with the results obtained in f(R) gravity with higher derivatives. It is proved that there is a Weyl conformal transformation which transforms the de Sitter and power-law solutions in one frame to similar solutions in the other

Economic aspects of local authorities functioning

© The authors. The relevance of the study on economic aspects of local authorities' functioning is due to their dual nature in the complex system of market relations. In this regard, this article is aimed at economic aspects' revealing of local authorities' functioning, as well as the disclosure of various interest levels' interaction in the system of municipal management. A leading approach in the study of this problem is the method of the effectiveness assessing of local authorities' functioning. The article presents the analysis of domestic researchers' different points of view in relation to the substantial characteristics of municipal economy, reveals the nature of the interaction of various interest levels in the system of municipal relations, discloses the duality of local authorities' position in the municipal system of economic relations, proposes a classification of business entities under the municipal economy, proves the specificity of the economic and moral relations in the system of local authorities. The article is valuable for researchers, teachers and students studying the problems of formation and development of the national municipal economy, research methods within the discipline "Economics of public (government) services", "Municipal economy", as well as specialists of local authorities who are concerned with the improvement and development of municipal economy

Estimation of Reserves of Tula Horizon Oil Deposits of Severo-Yurmanskoye Field, Perm Kray

В рамках работ по выявлению неоценённых залежей на разбуренных площадях нераспределенного фонда недр Пермского края проведена оценка запасов тульских нефтяных пластов Тл2-а и Тл2-б на Юрманской нефтеносной структуре. Возможность подсчёта запасов по этим объектам определяется получением промышленных притоков нефти при их испытании в колонне скважины № 174, наличием обоснованных структурных построений по данным сейсморазведки и глубокого бурения с учётом современных стратиграфических разбивок, изученностью характера выдержанности пластов по площади, обоснованностью высотного положения ВНК, оценкой эффективных нефтенасыщенных толщин пластов по данным переинтерпретации материалов ГИС, изученностью по керну вещественного состава и коллекторских свойств пластов, исследованием физико-химических свойств нефти в глубинных и поверхностных условиях, обоснованностью КИН статистическим методом.This article presents an estimation of reserves of the Tula horizon oil-bearing layers Tl2-a and Tl2-b at the Severo-Yurmanskoye oil field. Research was carried out in order to prospect the unestimated oil reserves at the previously drilled but not commercially producing areas of Perm kray. The opportunity of reserve calculation for this oil field was provided by the sufficient oil encroachment rate achieved during testing of Tula horizon layers in the borehole 174, reliable mapping of oil-bearing horizons using seismic and borehole data, existence of updated stratigraphic information, results of study of uniformity of oil-bearing layers throughout the area of the Severo-Yurmanskoye oil field, reliable estimate of the position of water-oil contact, defining the effective oil-bearing thickness of oil-bearing layers using results of borehole geophysical survey, study of lithological composition and reservoir  properties, study of physical and chemical properties of oil in borehole and in laboratory, and reliability of statistical evaluation of oil recovery factor

Economic aspects of local authorities functioning

© The authors. The relevance of the study on economic aspects of local authorities' functioning is due to their dual nature in the complex system of market relations. In this regard, this article is aimed at economic aspects' revealing of local authorities' functioning, as well as the disclosure of various interest levels' interaction in the system of municipal management. A leading approach in the study of this problem is the method of the effectiveness assessing of local authorities' functioning. The article presents the analysis of domestic researchers' different points of view in relation to the substantial characteristics of municipal economy, reveals the nature of the interaction of various interest levels in the system of municipal relations, discloses the duality of local authorities' position in the municipal system of economic relations, proposes a classification of business entities under the municipal economy, proves the specificity of the economic and moral relations in the system of local authorities. The article is valuable for researchers, teachers and students studying the problems of formation and development of the national municipal economy, research methods within the discipline "Economics of public (government) services", "Municipal economy", as well as specialists of local authorities who are concerned with the improvement and development of municipal economy