Informational aspects at model of power consumption by main drainage facilities of iron-ore mining enterprises

The work investigates into variable informational approaches to modeling power consumption by main drainage facilities of ore mining enterprises with underground mining method. Methodological recommendations for using the models are also designed. The research deals with general methodological approaches to model formation with both power consumption indices for drainage facilities and corresponding costs. Logistics of model formation is substantiated, namely, combination of classic multifactor regression modeling with modern digital modeling methods – automated control systems used for drainage facilities. Principles of building fuzzy logic controllers and algorithms of their functioning under multichannel control are determined in detail. The improved fuzzy logic-based variant is proposed and combined, with correlation analysis, to provide the basis for developing algorithms of the automated control systems of electric power consumption. There is an example of developing a “road map” for implementing a generalized algorithm for automated control systems power flows for two current cases – a selective tariff with limited daily contract-based power consumption and that with a variable tariff. It is established that application of the two-rate hourly tariff with its conditional distribution (Night/Peak) instead of the three-rate tariff (Night/Half-Peak/Peak) on a single-use basis leads to a thirteen percent increase of daily power costs with a single-channel control of the ore flow and a seven percent increase with two-channel control (ore flow and drainage simultaneously). The use of fuzzy logic controllers enables minimizing these losses.

Diagnostic Value of Prenatal Ultrasound Parameters and Esophageal Signs in Pouch and Lower Thoracic Segment in Fetuses with Esophageal Atresia

In order to investigate the diagnostic value of prenatal ultrasound parameters and signs of pouch and lower thoracic esophagus in the fetus with esophageal atresia (EA), the prenatal ultrasound data of 35 EA fetuses (observation group) confirmed by autopsy after induced labor or postnatal surgery and imaging examination in our hospital from May 2019 to May 2021 were retrospectively analyzed and compared with 35 normal postnatal fetuses (control group). General information and prenatal ultrasound parameters of the two groups, including head circumference (HC), abdominal circumference (AC), double parietal diameter (BPD), fetal body weight (EFW), and signs (small or unmanifested gastric vesicles, amniotic fluid, neck or upper chest pouch, lower chest esophagus not visible), were analyzed using logistic regression. The logistic multifactor regression model for EA diagnosis was established, and the diagnostic value for EA was analyzed. As a result, the HC, AC, and EFW of the observation group were lower than those of the control group, the gastric bubbles were small or not displayed, the amniotic fluid was more, and the signs of neck or upper chest pouch and lower chest esophagus were not visible in the observation group ( P < 0.05 ). Logistic regression analysis showed that decreased ultrasound parameters HC, AC, EFW, small or no gastric bubble, amniotic fluid, neck or upper chest pouch, and no visible signs of lower chest esophagus were all risk factors for EA ( P < 0.05 ). And in the prenatal ultrasound diagnostic model of EA was established, logistic P = − 19.851 + HC × 0.384 + AC × 0.682 + EFW × 0.695 + small or no gastric vesicle × 3.747 + amniotic fluid × 3.607 + cervical or upper chest sac × 4.104 + invisible lower thoracic esophagus × 4.623 .When logistic P > 0.468 , AUC was 0.891, χ 2 was 7.764, diagnostic sensitivity was 91.24%, and specificity was 79.22%. To draw a conclusion, prenatal ultrasound parameters and signs are of great value in the diagnosis of EA. Independent influencing factors of EA include small or no HC, AC, EFW and gastric vesicles, polyhydramnios, neck or upper chest pouch, and invisible lower thoracic esophagus. Logistic multifactor regression model has a high coincidence rate for the prenatal diagnosis of EA, providing a basis for clinical decision-making.

Assessment of the factors influencing on the formation of energy-oriented modes of electric power consumption by water-drainage installations of the mines

Purpose. Performing the analysis to determine energy-efficient modes and assess the characteristics of the main indicators of electric power consumption by mine water-drainage installations based on the developed research mathematical model. Methods. To achieve the purpose set, a methodology is used to develop the multiple multifactor correlation-regression modeling with respect to the modes of electric power consumption by electrical and mechanical complexes of mine water-drainage installations. The amount of consumed electric power is found as an effective feature. The expediency of using the nonlinear multiple regression analytical ratios has been substantiated during the model development. A comparative analysis of a multiple multifactor regression model, presented in the form of a power and linear function, has been performed. Findings. The research results make it possible to determine that the greatest influence on the electric power consumption is made by water inflow, and the smallest influence – by the depth of water pumping from underground horizons. The expediency of using a multiple multifactor regression model in the form of a power function has been substantiated. The elaborated quantitative values of the factors of electric power consumption by electrical and mechanical complexes of mine water-drainage installations have become the basis for the introduction of innovative technological solutions at the relevant iron ore enterprises to optimize the cost characteristics of the electric power consumption. Originality. For the first time for the analysis and assessment of the operating modes of the main water-drainage installations of mines, the use of mathematical modeling based on the multiple correlation-regression method is proposed. The developed model takes into account a complex of technological parameters of influence on the water-pumping process. The analysis of the proposed model makes it possible to identify significant factors influencing the modes of electric power consumption by electrical and mechanical complexes of water-drainage installations in the mines and to conduct water-drainage assessment for constructing an algorithm for optimal control of this process in the cost-target direction. Practical implications. The research tactics are proposed for determining the energy-efficient operating modes of the main water-drainage installations of the mines by the method of mathematical modeling. The analysis of the obtained results of mathematical and statistical modeling makes it possible to take into account the complex of technological parameters of the influence on the water-pumping process, to identify and assess the modes of electric power consumption by the main water-drainage installations, as well as to obtain the initial data for the development of the structure of the control algorithm for mine stationary installations of this type in the cost-target aspect.

ORGANIZATIONAL AND FINANCIAL DETERMINANTS OF THE INNOVATIVE COMPONENT OF THE COUNTRY’S COMPETITIVENESS

The article identifies the impact of sources of funding for innovation in the country on economic growth through economic and mathematical modeling and construction of regression equations between GDP and funding for innovation and research costs with the construction of a multifactor regression equation. As a result of regression analysis, it was found that the most significant impact on the resulting indicator have such variables as capital investment from state and local budgets and research and development costs. Using the method of extrapolation, GDP growth was forecast for 4 years, and it was found that capital investment from own funds of enterprises and organizations will grow by 24,08%, capital investment from state and local budgets by 28,42%, research costs and development by 22,76% for the analyzed period.Subject to compliance with the projected values of the financial determinants of the innovative component of increasing the country’s competitiveness, the volume of estimated GDP in actual prices for the forecast period will increase by 936039,011 million UAH or 23,26%. The reasons for the low level of the state of the innovation sphere in the domestic economy are outlined: underdevelopment of the market of innovative products due to low indicators of development of integration processes in it; weakness of relations that determine the innovative nature of economic development; low motivation of the industrial sector in innovative development; the supply of technological innovations created by national industrial companies and research institutions in the domestic market is limited; high cost of development and implementation, high interest rates on the investment portfolio, a long payback period, the focus of financial institutions on the issuance of «short loans», usually consumer loans for technological renewal of industrial sectors. To resolve such contradictions, the system-forming factors of a set of measures to intensify integration processes in the innovation sphere of Ukraine were proposed. Systematized foreign experience in scientific, technical and innovation policy, as well as commercialization of innovations, taking into account which proposed conceptual guidelines for organizational and financial support of the effectiveness of the innovative component of competitiveness: economic mechanisms (direct budget investments; preferential lending; integration with foreign institutions; financial activities; increase the share of GDP aimed at financing innovation processes, development of an effective set of measures to attract international grants and household savings as investments to implement the concept of innovative development of the country’s economy, etc.); organizational mechanisms (formation of integration clusters using the potential of education, business, government, public; state assistance in the development of innovation infrastructure, etc.). Keywords:innovations, financial support of innovative development, country competitiveness, innovation system, cluster, regression, correlation, integration processes. JEL Classification O11, O19, O16, O33, E62, F20 Formulas: 1; fig.: 5; tabl.: 3; bibl.: 12.

CORPORATE CULTURE OF COMPANIES IN THE CONDITIONS OF TRANSFORMATIONS

In modern economic conditions, enterprises function and develop as a complex organism, the vital potential of which is provided by corporate culture. Corporate culture determines not only the difference between organizations, but also determines the success of their operation and survival in a transformational environment. The successful operation of the enterprise also requires a solid foundation in material, financial and human resources, however, without a well-established corporate culture, the organization will not be able to exist in today’s complex environment. In this aspect, an important role is played not only by the approaches to the diagnosis of corporate culture, which were developed by well-known scientists, but also the practical adaptation of changes in corporate culture to business practice. Among the most significant results of these studies are the method of clinical research by E. Schein, the method of diagnosing corporate culture of the organization, proposed by K. Cameron and R. Quinn, and to some extent the system of diagnostic and strategic management of the company, offered by D. Norton and R. Kaplan. The methodological basis of the study is a system of general and special methods, which allowed to investigate the impact of the phenomenon of leadership potential on corporate culture. The study was based on the use of: method of comparison, generalization — to clarify and formalize the essence of the concept; method of correlation and regression analysis — to build multifactor regression models, calculate predictive values of integrated indicators of leadership potential for each subsystem, optimize subsystems, determine the degree of influence on type of corporate culture; graphoanalytical method — to provide clarity of the material and schematic representation of a number of theoretical and practical provisions of the study. Methods of computer processing, analysis and display of information using Microsoft Excel, STATISTICA were used for complex analysis. The information base is official publications of international organizations, expert assessments of rating agencies, monographic literature, fundamental scientific developments of domestic and foreign authors, materials of scientific conferences, domestic and foreign publications, electronic resources of the Internet, etc. Keywords: corporate culture, leadership potential, diagnostics of corporate culture. JEL Classification M10, M12 Formulas: 0; fig.: 3; tabl.: 3; bibl.: 10

Effect of Arterial Hypertension on the ICAM-1, VCAM-1 and Е-selectin Level in Type 2 Diabetes Patients

Cardiovascular disease is the leading cause of death in diabetes mellitus. Endothelial dysfunction is the first step in the development of atherosclerotic vascular lesions, which underlies cardiovascular pathology, and adhesion molecules secreted by the endothelium during inflammatory changes are involved in the progression of this lesion. The objective: the serum level of adhesive molecules (ІCAM-1, VCAM-1, Е-selectin) in hypertensive and non-hypertensive type 2 diabetes patients as a marker of endothelial dysfunction and its relationship with other risk factors for cardiovascular disease was studied. Materials and methods. We examined 64 patients with type 2 diabetes, which were divided into two subgroups: the first subgroup – 41 hypertensive type 2 diabetes patients (age – 53,56±7,14 years, BMI – 32,2±87,4; HbA1c – 9,97±2,02%), the second subgroup – 23 nonhypertensive type 2 diabetes patients (age – 50,5±4,92 years, BMI – 25,4±5,22; HbA1c – 9,09±1,95%). The control group included 18 people without diabetes with normal blood pressure (age – 50,72±6,98 years, BMI – 24,71±4,88; HbA1c – 5,26±0,42%). The serum level was determined by immunoenzyme assay. The significance of the difference between the mean values was determined by the t-Student test. Multifactor regression analysis was used to assess the relationships between the studied factors. Results. We revealed an increase of serum levels of ІCAM-1, VCAM-1, Е-selectin in hypertensive (+71,62%, +68,42%, +66,95%, respectively) and non-hypertensive type 2 diabetes patients (+46,17%, +62,79%, +42,85%, respectively) compared with the control group (p<0,01). The serum concentration of ІCAM-1, Е-selectin was higher in hypertensive type 2 diabetes patients compared to non-hypertensive type 2 diabetes patients (+17,27%, +16,86%, respectively, p<0,01). There was a significant effect of Hb1Ac, lipids, insulin resistance on the serum level of ІCAM-1, VCAM-1, Е-selectin (p<0,01). The corresponding regression equations are derived. Conclusion. There is an increase of serum level of ІCAM-1, VCAM-1, Е-selectin in hypertensive and non-hypertensive type 2 diabetes patients, which indicates the development of endothelial dysfunction. Hypertension, hyperglycemia, dyslipidemia and insulin resistance contribute to the development of these changes.

FOREIGN DIRECT INVESTMENTS IN THE ECONOMIC GROWTH OF THE OPEN ECONOMY OF UKRAINE

In terms of globalization of the world economy, the open economy of a country participating in the globalization process becomes an organic element of the world economy and thus receives additional incentives for development. International flows of goods and capital allow countries to get new sources for economic growth. Economic growth is now not only a function of internal but also of external factors. It is they who now determine the modernization tendencies of national economic policies, forcing them to move in accordance with world trends. The purpose of the research is to assess the relationship between economic growth of the country and external factors of its economic development, as well as to identify the dependency between external factors in order to clarify their role in the modernization of national economy. With this aim, the analysis of the main parameters of openness of Ukraine’s economy is carried out, as of external factors that influence on the national economic development, changes in the traditional production function under the influence of introduction in it of external factors of development, the estimated indicators of the named influences are modeled. The novelty of the research is the identification of dependency between the forms of openness of the economy and economic growth, the development of a model of relationship between the forms of openness of the economy. Research method. The study is based on a set of economic and economic-mathematical methods that are needed to identify the influence of external factors on the national economy, especially methods of abstraction, systematic and structural-comparative analysis, synthesis and modeling of economic processes. Among the models used in the research is a multifactor regression model. The empirical basis was the materials of official statistics of Ukraine for 1999—2019. The results of research showed: the role of globalization of Ukraine’s economy in its economic development, the importance of FDI as an external factor of economic development, the strong link between international capital flows and international flows of goods into the Ukrainian economy, the positive impact of the latter on the former. Keywords: economic growth, globalization, external factors of economic growth, production function, open economy, FDI, foreign trade, government investment policy. JEL Classification F21, F43, F47, F62 Formulas: 7; fig.: 1; tabl.: 8; bibl.: 24.

DEVELOPMENT OF MODERN BUSINESS PROCESSES AND OUTSOURCING ACTIVITIES

The purpose of the article is to study the key features of modern business processes and outsourcing. The subject-matter of the study is the methodological and conceptual foundations of the development process of modern business and outsourcing activities. Methodology. The research is based on a set of well-known general scientific and special methods of research in economics. In particular, the method of scientific abstraction, the method of systematic analysis, economic and mathematical modeling were used in the article. Conclusion. Many types of modern work can be outsourced. Thus, this will eventually lead to a confrontation between protected freelancers and freelancers whose employment is not regulated at the legislative level. The world is changing much faster, the labor market is undeniably affected when most jobs are simplified by technology; one of the consequences is a departure from the usual regulated labor relations and structures. The work environment and the environment are changing radically today. New forms of cooperation can take legal relations beyond legal regulation in those countries that fail to adapt their legislation in time to new rapidly evolving business strategies, which often lack the concept of territorial boundaries and mostly demand talent for effective solutions. With the help of constructed multifactor regression models, which are adequate to the available statistical and calculated data and have high degrees of significance of the estimated parameters, it is possible to predict changes in the simulated economic phenomenon as a result of changes in one or more factors. It should be noted that such models today are not sustainable in the long run, as in the Ukrainian and global economies, the external environment and its conditions change quite often. Therefore, in the future it is advisable to calculate new parameters of regression models based on the presented methods and make predictions according to the obtained data. In authors’ opinion, the main reason for the increase in the share of outsourcing in Europe in the coming years is the strengthening of competition in the world market and the growth of the euro. It is believed that traditionally vertically integrated business processes will be broken into fragments and partially outsourced. This will allow European companies to increase their revenues and production volumes.

University Social Responsibility during the COVID-19 Pandemic: Universities’ Case in the BRICS Countries

University social responsibility (USR) is an important assessment criterion of the QS Stars. In the context of the COVID-19 pandemic, the social orientation of universities as intellectual leaders in the development of society gains particular importance. The research purpose is to analyze the impact of the COVID-19 pandemic on the university activity directions in the framework of strategies (USR). An empirical assessment of the level and complementary factors of USR in the BRICS countries (Brazil, Russia, India, China, and South Africa) was conducted, using the method of integral and expert assessment. Grounded on scoring according to the principal component analysis, the structure of the factors of the USR development in the BRICS countries was determined. Multifactor regression modeling allowed substantiating the priority of factors stimulating the development of USR in the BRICS countries in modern conditions and arguing the main barriers to introducing the concept of social responsibility into university activities and expanding the stakeholders’ circle in it. The research results showed that the university management creativity, effective communication with the public and stakeholders, the quality of the educational process and the development of scientific activities stimulate USR development in the BRICS countries and should be used as the basis for the strategic planning of activities in the context of the continuing COVID-19 pandemic. Conceptual trends in the USR development can be useful for universities in the studied countries when adapting strategic development plans regarding the social needs of modern society.

Conceptual aerodynamic design of an executive supersonic passenger aircraft – ESPA

Despite 50 years of technological advancement since the inception of Concorde, research on supersonic passenger aircraft has only recently resulted in design and flight test of several small 12- to 55-passenger business jets with supersonic cruises between Mach 1.2 and 2.2. Analytical research designs of larger 300-passenger aircraft have been conducted only to speeds of Mach 2.0 and 2.2, mainly avoiding moving beyond turbojet propulsion. This research extends on an earlier multifactor regression sizing study to determine in greater design detail what the configuration of a 200-passenger Mach 3.0 aircraft could be using extant technology. This research article is the first part of two and covers the conceptual aircraft design evolution focussing on the aerodynamics, wing and fuselage. In contrast, the second article covers engine conceptual design and placement. Wing shape optimization is performed using fundamental CFD analysis to arrive at a configuration suitable for both subsonic and supersonic flight. Noise considerations and shock wave formation drive further design iterations based on the research literature. The viability of this research design informs a future multidisciplinary optimization like those recently published in the literature for smaller supersonic business jets.