Pré-requisitos para a formação de paradigmas modernos de gestão em termos de evolução do conhecimento científico

Research on the issues relevant to understanding of the directions scientific knowledge is moving in in economics and management is an important component of the modern science. This knowledge is formed and summarized through scientific paradigms. An enormous impact management has on all types of economic activities determines the management paradigms importance when selecting the most effective way in socioeconomic development. The purpose of the research is to examine the prerequisites for occurrence of such paradigms in terms of scientific knowledge evolution in economics and management. The article proposes the author’s management paradigm definition as scientific category and examines scientific and historical factors behind the formation of the classic management paradigm and reveals an organic link between management paradigms and socioeconomic development ones. In particular, the article analyzes the process of gradual transition from the classic management paradigm to innovation one. The author studies and compares the approaches taken by leading scientists in this field and determined dominating scientific models formed within innovation paradigm. The subject matter of such models studying and crucial modern science categories, i.e. innovation management, knowledge economy, intellectual capital, organizational capital, human capital and a number of other categories.La investigación sobre los temas relevantes para la comprensión de las direcciones en que se está moviendo el conocimiento científico en economía y gestión es un componente importante de la ciencia moderna. Este conocimiento se forma y resume a través de paradigmas científicos. Un enorme impacto que tiene la gestión en todos los tipos de actividades económicas determina la importancia de los paradigmas de gestión a la hora de seleccionar la forma más eficaz de desarrollo socioeconómico. El propósito de la investigación es examinar los requisitos previos para la ocurrencia de tales paradigmas en términos de la evolución del conocimiento científico en economía y gestión. El artículo propone la definición del paradigma de gestión del autor como categoría científica y examina los factores científicos e históricos detrás de la formación del paradigma de gestión clásico y revela un vínculo orgánico entre los paradigmas de gestión y los de desarrollo socioeconómico. En particular, el artículo analiza el proceso de transición gradual del paradigma de gestión clásico a uno innovador. El autor estudia y compara los enfoques adoptados por los principales científicos en este campo y determina los modelos científicos dominantes que se forman dentro del paradigma de la innovación. El tema de tales modelos es el estudio y las categorías cruciales de ciencia moderna, es decir, la gestión de la innovación, la economía del conocimiento, el capital intelectual, el capital organizacional, el capital humano y una serie de otras categorías.A pesquisa sobre as questões relevantes para a compreensão das direções em que o conhecimento científico está se movendo na economia e no gerenciamento é um componente importante da ciência moderna. Esse conhecimento é formado e resumido através de paradigmas científicos. Um enorme impacto na gestão de todos os tipos de atividades econômicas determina a importância dos paradigmas gerenciais ao selecionar a maneira mais eficaz de desenvolvimento socioeconômico. O objetivo da pesquisa é examinar os pré-requisitos para a ocorrência de tais paradigmas em termos de evolução do conhecimento científico em economia e gestão. O artigo propõe a definição de paradigma gerencial do autor como categoria científica e examina os fatores científicos e históricos por trás da formação do paradigma clássico de gestão e revela um elo orgânico entre paradigmas de gestão e desenvolvimento socioeconômico. Em particular, o artigo analisa o processo de transição gradual do paradigma clássico de gestão para a inovação. O autor estuda e compara as abordagens tomadas pelos principais cientistas neste campo e determinou modelos científicos dominantes formados dentro do paradigma da inovação. O tema de tais modelos estudando e categorias cruciais da ciência moderna, ou seja, gestão da inovação, economia do conhecimento, capital intelectual, capital organizacional, capital humano e uma série de outras categorias

Boost type series resonant converter with flexible structure for power supplies

Relevance. Geophysical research quality highly depends on power supply system, which, in its turn, has to provide uninterrupted power, for instance by means of accumulator battery. Specifically, continuity of supply is important for borehole logging during directional drilling which requires autonomous (self-powered) equipment. Converter powering geophysical equipment operates at high temperatures, where heat removal is impeded, makes the enhancement of the converter efficacy of utter importance. In that regard boost type topologies converting a part of a total power flow are preferred, especially in non-isolated power supply systems. However hard commutation in such topologies impairs an efficiency thus justifying development of boost type resonant converter. The aim of the research is to develop resonant boost type converter of high efficiency and to investigate one's power and control properties. Methods: electrotechnique fundamentals, linear equations theory, along with the modern simulation software, computational and mathematical modeling techniques. Results. The authors have analysed DC-DC resonant bridge converter with the boost link in voltage regulation mode powered by the battery as well as in a battery charge mode. The paper demonstrates high efficiency of a narrow battery voltage range. The control mode has substantial influence on operating parameters. Variable frequency PWM keeps relatively low value of operating current thus providing maximum efficiency. Frequency variation required to stay in soft commutation mode by guaranteeing current direction at turn-on instance. Soft commutation transitions are however different for the inverter and synchronous rectifier. Inability of boost topology to limit output current at overload is shown and topological solution is proposed to overcome it using auxiliary switches. The results are proven using hardware prototype. The paper introduces the conclusions as well as discussion of the results

Requisitos previos para la formación de paradigmas de gestión modernos en términos de evolución del conocimiento científico.

La investigación sobre los temas relevantes para la comprensión de las direcciones en que se está moviendo el conocimiento científico en economía y gestión es un componente importante de la ciencia moderna. Este conocimiento se forma y resume a través de paradigmas científicos. El enorme impacto que tiene la gestión en todo tipo de actividades económicas determina la importancia de los paradigmas de gestión al seleccionar la forma más efectiva en el desarrollo socioeconómico. El propósito de la investigación es examinar los requisitos previos para la aparición de tales paradigmas en términos de evolución del conocimiento científico en economía y gestión. El artículo propone la definición del paradigma de gestión del autor como categoría científica y examina los factores científicos e históricos detrás de la formación del paradigma de gestión clásico y revela un vínculo orgánico entre los paradigmas de gestión y los de desarrollo socioeconómico. En particular, el artículo analiza el proceso de transición gradual del paradigma clásico de gestión al innovador. El autor estudia y compara los enfoques adoptados por los principales científicos en este campo y determina los modelos científicos dominantes formados dentro del paradigma de la innovación. El tema de estudio de tales modelos y categorías cruciales de la ciencia moderna, es decir, gestión de la innovación, economía del conocimiento, capital intelectual, capital organizacional, capital humano y una serie de otras categorías

Selection of optimal parameters of horizontal wells with SAGD technology based on numerical simulation

As the development of reserves of traditional oil takes place, an important component of the raw material base is the reserves of highly viscous oil and natural bitumen, one of the effective methods for the development of which is the SAGD technology. This paper is devoted to optimizing the length of the horizontal section of wells with the SAGD technology using numerical modeling for one of the fields of high-viscosity Caribbean oil and finding the analytical dependence of the technological characteristics of the method on the parameters of the wells. The solution of the tasks was carried out using a thermohydrodynamic simulator «CMG STARS» (Computer Modeling Group). The paper presents the results of calculations to determine the optimal rate of steam injection and the length of a horizontal wellbore at the SAGD, as well as the analytical dependence of the technological characteristics of the parameters of the well, which can be used for an initial assessment of the effectiveness of technology for specific geological and physical conditions in this area

Disposal of flue gases in oil reservoirs with high-viscosity oil in order to increase oil recovery and improve the environmental situation

The reserves of highly viscous oils and natural bitumen are several times higher than the stocks of light oils. In the development of such oils by thermal methods, steam is produced, the development of which is accompanied by significant emissions into the atmosphere of flue gases, including carbon dioxide. According to estimates, the extraction of high-viscosity oils annually releases about 34.5 million tons of carbon dioxide into the atmosphere. However, carbon dioxide emissions from steam generation can be reduced to zero by injecting flue gases along with steam into the formation. In addition to environmental benefits, the technology of co-injection of water vapor and combustion gases (nitrogen and carbon dioxide) has a complex (thermal and physico-chemical) effect on the formation with a synergistic effect. The article is devoted to the analysis of the mechanisms affecting the increase in oil recovery during the co-injection of steam with flue gases, the description of equipment for the injection of flue gases into the reservoir, as well as the analysis of field experience in using this technology. The calculations for one of the fields of high-viscosity oil show the high efficiency of co-injection of water steam with flue gases

Investigation of the stability of nanofluids based on water and carbon nanoparticles synthesized by the electric arc method

In this work, arc discharge synthesis was carried out by sputtering electrodes of various compositions in a helium medium, as a result of which two types of materials containing carbon globules and graphene flakes were obtained. The synthesized materials were characterized with transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy. The effect of the type and concentration of carbon nanoparticles and the type of surfactants on the stability of water-based nanofluids was studied with optical spectroscopy. For carbon globules and water, the mass concentrations of nanoparticles and sodium dodecyl sulfate were determined to obtain a nanofluid based on them stable for 1 month, which are 0.02% and 1%, respectively. It was shown that the use of neonol AF 9-12 at a concentration of 2% didn’t lead to the stabilization of carbon globules with a mass concentration of 0.02% in water. For graphene flakes, the mass concentrations of nanoparticles and stabilizers to obtain a water-based nanofluid stable for 1 month were: 0.02% graphene flakes and 1% SDS, as well as 0.02% graphene flakes and 2% neonol AF 9-12, respectively

Possibility of implementation of dry technology of gold-bearing ores roughing: case study of “Gurbey” deposit

The aim of the research is to identify the ability/feasibility of dry roughing of ore taking as the example “Gurbey” deposit in Irkutsk Region and to develop a rational scheme for processing ores containing free gold. Studies of the dry processing technology of gold-bearing ore at “Gurbey” deposit with the initial weight of 1,123.8 kg were carried out by semi-industrial plants: the DKD-300 combined shock impact crusher, the CMVU-800 centrifugal mill and the POS-2000 air separator developed by CNMI SD RAS. The sample was subjected to two cycles of crushing and four cycles of grinding followed by pneumatic separation. The circulating load is class +12 mm after the DKD-300 crusher, and for the mill, all screening products are +3 mm, as well as the products of classification -3 + 1 mm of the POS-2000 concentrate. As a result of treatment of the concentration products, 23.93 grams of free gold was recovered (concentration on tables: control, recleaning, concentration of the Mosely minerals by analyzer, magnetic separation, heavy medium separation on bromoform). At the same time, it was established that gold from the ore with initial size of 150 mm can be completely stripped and recovered with the POS-2000 air separator with a particle size of up to 100 microns. At the same time gold extraction into the primary concentrate is up to 60%. Based on the results of the research, a basic scheme for dry roughing of “Gurbey” ore containing “free” native gold was developed using the ore treatment devices: RD-MDV-900, DKD-300 crushers, CMVU-800 centrifugal mill and POS-2000 air separator. The technological scheme is fundamental for gold-bearing ores containing "free" gold of fineness over 100 microns