bluuebunny/crossref_metadata_2025 huggingface dataset:
Deformation process modeling of the rock mass with spherical cavity created by explosion
Authors: Frolova Irina
Published: July 2021

The article discusses the solution to the axisymmetric problem of determining the stresses and displacements arising from the joint action on the asymmetric load (soil resistance) array and a centrally symmetric temperature field. The case of continuous one-dimensional inhomogeneity is considered, when the deformation characteristics of a rock mass with a spherical cavity obtained by explosion are the continuous functions of one of the coordinates - the radius. The solution of the original system of equations for the displacement components is sought in the form of expansions in Fourier series in Legendre polynomials. Using the method of variablesseparation, it is possible to reduce the problem to a system of two ordinary differential equations with variable coefficients, which is solved numerically. The stress state calculation of homogeneous and inhomogeneous massifs surrounding a spherical cavity has been carried out. A comparative analysis of the results obtained has been performed.
Influence of long-term exposure to loads on the annular sections’ strength and rigidness
Authors: Shchutskiy Victor , Blyagoz Alik , Shchutskiy Sergey , Slabukha Svetlana , Kurgin Konstantin
Published: July 2021

A numerical experiment was carried out to study rigidity, critical force, and bearing capacity of reinforced concrete racks with annular section under short-term and long-term loading. The effect of long-term loading was estimated in the numerical experiment by changing the coefficient φl from 1 to 1.8 times 0.2, as well as the modulus of deformations Eb,τ, taking into account the operating conditions (W = 40-75%). At the same time, the external load on the rack N was taken in the experiments as a multiple of the critical force Ncr from 0.2 to 1.0, and the relative eccentricity δe of the load application varied from 0.15 to 1.35, which made it possible to estimate the stress state of the struts in an extended range of possible loadings. The results obtained made it possible to identify qualitative and quantitative regularities of rigidity changes, critical force and bearing capacity of annular struts during short-term and long-term load application.
Optimization of the steel frame elements sections formed by i-beams diagonal expansion
Authors: Schutsky Sergey , Korzhov S.V. , Boldyrev А.S.
Published: July 2021

The article deals with the design of steel frames with the elements of variable stiffness, formed by the I-beam walls dissolution along the diagonal and subsequent welding. The possibility of rolled I-beams with different profiles optimal use along Industry Standard Association of Enterprises and Organizations for Standardization of Ferrous Metallurgy Products 20-93, for the frame pre-fabricated elements is determined. A calculation algorithm for determining the geometric characteristics of a composite section is presented. The analysis of such elements use effectiveness is carried out, using the example of the building frame, designed according to the frame-link scheme of welded single-span frames with variable section elements in accordance with the standard typicals 828 KM.
The use of information technology in the DSTU new campus business center life cycle operational phase management
Authors: Vorontsova Оlga , Shvets Yuliya , Sheina Svetlana
Published: July 2021

The article describes the information technology effective use possibilities in the building technical condition management within the operational phase of the building’s life cycle. In the course of the work, the most important stage for assessing the application of technologies is the operation stage, which is the longest and most expensive in the life cycle of a building. The main characteristics of the designed object are given. The main benefits from the information technologies use at the stage of building operation are outlined. The building life cycle cost analysis for three operational models is presented.
The pipe material and improvement state analysis of technological processes for laying main gas pipelines
Authors: Pirumyan Narine , Stakyan Migran , Khazaryan Hmayk
Published: July 2021

The change in the structural state of the gas pipes’ weld material at different seam cross-sections have been considered. The classification of external and internal defects of the joint material caused by the influence of different types of factors, most significant of which are the material defects in the transition zone of the joint to the pipe base metal. The analysis of atmospheric effects on the pipeline welds materials initiating adsorption and electrochemical processes in the metal microstructure that cause corrosion on the seam outer surface is given. Taking into account the non-stationary mode of pipes loading due to fluctuations in internal gas pressure, corrosion-fatigue damage is also added to these material defects, which cause the fatigue cracks development in the material, leading to a violation of the system tightness and even to welds destruction. The structure of a mobile device is proposed for performing a complex of technological operations for assembling large-diameter ground gas pipeline and for ensuring installation accuracy and maintenance processing of the welded pipes’ edges, automatic welding along the seam perimeter, cleaning, grinding and hardening of the seam material outer surface, applying a protective coating against atmospheric influences. The device facilitates the work of installation staff, increases the reliability and bearing capacity of the gas transmission system installed in difficult terrain.
Quantitative characteristics of area of splicing surfaces of hot-deformed powder materials
Authors: Goncharova Tatyana
Published: July 2021

This article proposes for consideration the hot-deformed powder materials spliced surfaces area quantitative characteristics’ experimental determination. This study analyzes the spliced surfaces’ microstructures formation at various stages of obtaining hot-deformed powder materials. The features of the deformation processes during the formation of materials by hot working with pressure are considered. The nature of the splicing surfaces’ boundaries on the objects under study, as well as the process of pore healing during the compaction of moldings based on steel from two types of charge based on coarse and fine iron powder with different porosities, is traced. In the course of the work carried out, the selected iron powder particle size certain influence moment on the values of micro- and sub-micropores, surfaces of interparticle adhesion, inter- and intragranular adhesion is observed [1-3].
Calculation of eccentrically compressed reinforced concrete columns under various creep laws
Authors: Chepurnenko Viacheslav , Rusakova Elizaveta , Bugayan Irina , Vysokovskiy Dmitriy , Babakhina Ludmila
Published: July 2021

The article proposes resolving equations for eccentrically compressed reinforced concrete short columns obtained on the viscoelastic model basis. Comparison of the results obtained according to the theory of heredity, theory of hardening, aging, flow, kinetic theory, as well as the nonlinear theory of concrete creep by Yu.A. Gurieva is presented.
Settlements and dwellings of Karachais and Balkars
Authors: Sultanova Aminat , Unezheva Zalina
Published: July 2021

This article is devoted to one of the underdeveloped issues of the material culture of the Balkar and Karachai people - dwellings and settlements, which are the main components in human life support. The traditional dwellings of the Balkars and Karachais were distinguished by their special features that had been developed over the centuries in a peculiar historical and geographical setting. The paper gives a general description of the Balkar and Karachai dwellings.
Configuration of attractivity in construction
Authors: Pershina Irina
Published: July 2021

The author analyzes the validity of the use of the term “attractivity” in architectural accessories. The aesthetic side of the phenomenon in the architectural space is taken as a basis. As a methodology for the study of attractivity, a number of methods are used that create primary explanatory formulations. The conceptual content of the term “attractivity” is revealed. The transdisciplinary approach led to the consideration of the functional and semantic content of “attractivity” which reflects the sphere of shocking influences in architecture. The means of implementing the tactics of attractivity are considered. Based on the analysis of the characteristics of artistic vision and understanding of art and architecture, and taking into account the scientific data in the field of physiology and human psychology is devoted to the problems of visual perception, the analysis of the attractiveness of different degrees of emotions of surprise, within the “attractiveness” and “sensation”. The results of the study of the processes that are the basis for the emergence of the phenomenon of sensation, both in the recreational space and in architecture as a whole, are presented. At the same time, the configuration of the phenomenon is proposed as a formative and meaningful category of the spatial pattern of architecture. Sensory orientation is distinguished by the leading representative system. The material presented in the paper contributes to the addition of knowledge in the field of architectural spatial typology, and also determines the possibility of integrating the considered spaces into existing plans for the development of tourist potential.
Fractal geometry and design of modern structures
Authors: Mayatskaya Irina , Kashina Irina , Gerlein Natalia , Yazyev Batyr
Published: July 2021

One of the main directions in the application of mathematical methods in construction - is to create the complex objects using simple algorithms of fractal geometry with the use of computer technology. The use of fractal geometry methods to describe real systems, in particular, in the development of the architectural appearance of the city and the design of modern structures of the most amazing shape, will allow solving the problems of research and forecasting the urban environments development.
Reconstruction with using a comprehensive assessment
Authors: Perkova M.V. , Chechel I.N. , Dubino A.M. , Chechel I.P.
Published: July 2021

The relevance of the topic is determined by the need to solve a complex of problems related to the reconstruction of cultural heritage objects of regional significance with adaptation to modern use, taking into account investment attractiveness. The problem of preserving cultural heritage in a post-industrial society is due to the preservation of the memory of the place, its history and traditions. Preservation and restoration with the cultural heritage objects adaptation to a new function preserves the urban identity, makes the urban environment unique and attractive for residents.Urban planning and space-planning analysis of the cultural heritage object was carried out with the aim of its reconstruction and adaptation for modern use. Options for reconstruction and adaptation were developed. The decision options are justified by a comprehensive assessment for decision-making. The list of criteria and questions for quantitative assessment were clarified specifically for the process of reconstruction of the cultural heritage site.As a result of the quantitative analysis, an objective result was obtained that allows evaluating the effectiveness of the developed proposals from the point of view of the population, authorities, business and other participants in urban development. The optimal conceptual project proposal was identified. The proposed measures will help to preserve the object of cultural heritage, create new jobs, and implement cultural and social projects for various consumer groups.
Chronology of the Nizhne-Arkhyz fortified settlement development according to historical, bibliographic and archival sources
Authors: Treyman Julia
Published: July 2021

This article is devoted to identifying the chronology of the medieval Alania capital architectural and spatial structure formation. The study revealed that the first on the site were erected cross-domed temples, built according to the Byzantine model and dated to the first half of the 10th century. In this regard, the planning structure of the fortified settlement was formed under the influence of the Byzantine Christian topography traditions. The chronological stages of the fortified settlement formation are revealed. The planning structure of the Nizhne-Arkhyz fortified settlement is similar to the planning of Constantinople, the main features of which were laid down at the end of the 5th century. Both cities have similar outlines of plans, inscribed in a triangle, at the eastern peak of which their community centers were located. In the spatial planning scheme of both cities, there are three main streets, the directions of which merge into one main street leading to the community center. Community centers of cities are represented by the squares where Christian churches are located.
Improving the reliability of the designed pipeline facilities by improving acoustic diagnostics of microdefects
Authors: Arshinov Georgy
Published: July 2021

The use of high-pressure pipelines for the transportation of oil products, natural gas, water requires ensuring the trouble-free operation of these structures during the operation period. The reliability and strength of pipelines determines their operational and economic reliability. Obviously, the presence of microdefects in pipelines material leads to a decrease in their strength. In the vicinity of microdefects, the process of material destruction is possible, leading to a loss of strength, which is accompanied by the destruction of structures and, as a consequence, economic damage, environmental deterioration. The study is aimed at developing the approaches and methods for increasing the economic and operational reliability of pipeline facilities by improving the acoustic methods for fixing microdefects in the used construction material. Improvement of acoustic methods for detecting microdefects in viscoelastic materials of pipelines can be carried out by developing mathematically refined models of the cylindrical shells’ dynamics, taking into account real physical and mechanical characteristics, leading to more accurate parameters of combined nonlinear waves. Such models are nonlinear and are built taking into account the real hereditary properties of the material, the possibility of developing large strains in the material.
Digitalization of the construction products’ manufacturing process as a guarantee of the finished products quality
Authors: Romanenko Elena , Kim Valeria , Sandul Alexey
Published: July 2021

The article highlights the problems associated with the quality of the information platform at the enterprise, which is the guarantor of the quality of products and structures manufactured at the enterprises of the reinforced concrete complex. The article substantiates the dependence of the finished product quality parameters on the processes’ digitalization and the increase in the enterprise efficiency through the business information processes introduction in the WEB-segment. An example is given of integrating contextual advertising into the marketing sphere of an enterprise that manufactures the products for construction purposes and the implementation of the Bitrix24 system, which can be one of the most important tools in organizing the work of an enterprise through those aspects of the company that it can cover, starting with the coordination of the employees’ work, planning, analysis and administrative control as well as the economic activities of the enterprise and ending with document flow.
Improving the strength and resistance of cement composites to the external environment by utilizing complex additives
Authors: Fedortsov Anatoly , Fedortsov Vladislav , Ashchepkov M.V. , Rusakov K.V. , Gladkin Sergey , Erofeev Vladimir
Published: July 2021

The article discusses the influence of complex additives on the strength and resistance of cement composites to environmental impacts. One of the additives - PFM-NLK (concrete modifier)- a factory fabricated mixture of a superplasticizer with the addition of air-retaining and water proofing substances. Another one is a complex additive containing a superplasticizer, sodium tetraborate and boric acid.Common denominator is the content of the superplasticizer. It allows reducing the W / C ratio of the mixture thereby increasing the density and strength of the composite, and, accordingly, its frost and corrosion resistance. PFM-NLK water-proofing and air-retaining substances additionally work toward the formation of a material structure with increased frost resistance. The components of the other additive, boric acid and sodium tetraborate, form a borate buffer system, which leads to the softening of the “chemical impact” and thus further increases the corrosion resistance. The research findings revealed the effectiveness of complex additives and substantiated the regularity that if each factor is separatelyfacilitative forproperty improvement, then, when they are combined, the effect is multiplied. The PFM-NLKcomponents, when combined, contribute to obtaining a material structure with high frost resistance. An additive containing a hyper-plasticizer, boric acid and sodium tetraborate leads to an increase in strength and acid resistance.
Regression assessment of the model based on the experimental planning matrix in composite materials’ analysis problems
Authors: Balatkhanova Elita , Erofeeva Irina , Afonin Victor
Published: July 2021

An automated coefficients calculation of the regression model based on the experimental data in the form of a planning matrix is considered. The calculations are based on polynomial regression with possible consideration of the interaction effects between its factors. The application of the Moore – Penrose pseudoinverse matrix for determining the regression equation coefficients is shown. The choice of the calculated planning matrix is carried out taking into account the determination coefficient value and the factors’ calculated matrix rank. Calculation verification is carried out using the rank correlation between the experimental and calculated response functions. The experimental part of the work is given to determine the dependence of fungal resistance and fungicidal properties of filled cement composites on the type and grain size composition of the filler.
Information model for choosing a design solution for providing construction with mortar
Authors: Kabanov Vadim
Published: July 2021

Building materials are usually classified according to the criterion of the possibility of creating a stock at the construction site. Mortars and concrete mixtures have a limited time during which they must be used in the construction of building structures. There are technologies for the use of dry components of mortars from which the mixture is prepared at the construction site. However, the technology of manufacturing mortars at specialized plants is widely used, followed by transportation of the finished cement-sand mixture to the construction site. The problem under consideration raises issues related to the volume of supply of mortars and the intensity of this building material consumption. Within the framework of the research, the tasks of analytical description of the construction and installation work intensity influence on the technological processes of cement-sand mortars delivery to the construction site have been solved, a block diagram of the selection of an economically feasible design solution for providing the production process with a building mixture has been developed. On the basis of the presented results in the form of mathematical dependencies and a block diagram, the conclusions about the influence of a design solution for providing construction with a cement-sand mixture on the duration and construction and installation work cost have been formulated. A graphic representation of the procedure for making a decision on the supply of a construction with a cement-sand mixture is supposed to be used for the development of software that provides a description of the construction processes functioning in space and time, including for 3D models.
Methodical approaches to destructive and non-destructive testing application in forensic construction and technical expertise
Authors: Zilberova Inna , Novoselova Irina , AL-Fatla Tareq Neamah Mohsen , Petrov Konstantin
Published: July 2021

The article discusses the features of the destructive and non-destructive testing methods in the framework of forensic construction and technical expertise. Construction inspection of buildings and structures in the course of forensic construction and technical expertise is aimed at determining the characteristics of the actual technical condition, both of the structure itself and of its individual elements and structures. Conducting the objective and reliable research is not possible without accurate measurements, which necessitates the use of various methods, technologies, as well as modern devices and instruments.
Developing a new method of calculating heat and humidity air treatment by water in irrigation chamber
Authors: Egnatosyan Siranush , Egnatosyan Naira
Published: July 2021

The air treatment processes in the air conditioning systems are the main part of air conditioning. This paper presents the new corrected method of heat and humidity treatment calculation of air by water, where not only the heat transfer process between water and air is taking into account but also the mass transfer process. The accuracy of the suggested method verified using the calculations to determine the parameters of air and water in various real processes of heat and humidity air treatment, shown in the psychometrics chart of various scales. Application of the suggested method gives an opportunity to find out the correct technical solutions and the required processes of heat and humidity air treatment in the irrigation chambers of air conditioning units. Based on the calculations using the new method gets that the irrigated water must cool up to 30% deeper than the calculation with the existing method.
System management technology for technical maintenance of transport and technological machines
Authors: Voronin Vladimir
Published: July 2021

The paper considers the generalized structure of maintenance system, including, in the general case, the protection subsystem, the functional diagnostics subsystem, the test diagnostics subsystem, the maintenance and repair subsystem. The technical implementation of the listed subsystems is possible in the form of tools built into the object and in the form of tools external to the object. For the generalized structure of the transport and technological machines maintenance system, the possible ratios of the volumetric characteristics of built-in and external subsystems are analyzed (using the simplest analytical expression). The possibility of formalizing the control process of a generalized system of technical maintenance of autonomous objects within the framework of a finite-automaton model is discussed. In accordance with this model, it is proposed, first, to consider the on-board maintenance system as an operational automaton; second, each of its subsystems should be considered as a separate internal automaton that implements its own technological algorithm; third, the interaction of the four automata should be organized within the control automaton for the above-mentioned operating automaton. The algorithm for the functioning of this control automaton has been synthesized.
Ultra-miniature eddy-current converter for small defects of deep occurrence search in the area of high-yield-stress steels weld joints
Authors: Malikov Vladimir , Ishkov Alexey
Published: July 2021

The presented study describes a diagram of an eddy-current measuring system built on the basis of a subminiature eddy-current converter, intended for the conducting materials’ study. The article describes the results of testing a designed measuring system for defects search in 6XB2S steel samples, connected by a weld joint. The technology for creating such materials permits the significant impact resistance of finished products and provides an optimal combination of hardness and toughness. However, the defects formed in the material near the weld joint become a serious problem in the operation of such materials. In this study, an assessment of the possibility of searching for model defects hidden by a weld in two steel plates was made. The defects had different linear dimensions (0.3 - 0.9 mm) and occurred at different depths (1 - 2 mm). The developed system showed high efficiency of scanning and searching for defects with linear dimensions up to 0.9 mm. The search for smaller defects required a significant modernization of the developed measuring system - the introduction of a second eddy-current converter. The article presents the data confirming the feasibility of this change in the measuring system and the possibility of using a measuring system with two eddy current converters to search for small defects occurring at a considerable depth.
Social bonds as a tool for financing concession projects in the housing and communal services sector in Rostov oblast, Russia
Authors: Sidorenko Elena
Published: July 2021

The article discusses the possibility of using social bonds as the additional sources of financing in the construction and operation of water supply and sanitation facilities under concession agreements. The specifics of social bonds in accordance with the requirements of the International Capital Markets Association (ICMA) to social impact projects has been clarified. It is proposed to use the social bonds’ circulation mechanism in the implementation of investment projects for the technological modernization of water supply and sewerage networks in the municipalities of the Rostov region. The liquidity of social bonds will be determined by collateral, which will be the government grants, which the investor will be able to receive only if the stated social goals are achieved. In order to reduce risks and increase the attractiveness of social impact projects, it is proposed to use the RR Regional Development Corporation as a project operator and guarantee fund.
Theoretical justification and development of technical means to ensure environmental safety of urban water management systems
Authors: Khetsuriani Elguja , Bondarenko Vladimir , Khetsuriani Teona , Khetsuriani Timur
Published: July 2021

Ecological safety of water intakes in urban water management systems and the creation of comfortable living conditions for people can be ensured only with a comprehensive solution to the problems associated with improving water quality when it is taken from the source, preserving biodiversity in the water body, protecting against blue-green algae, zebra mussel and mechanical pollution. The water intake technological complex as a part of the natural-technical system (NTS) specialized type “Natural water environment - Urban water management complex - Urban water supply system” (“NWE - UWMC - UWSC”), as the main multifactorial technogenic component, includes various types of hydraulic structures and protective devices interconnection, interaction and relationship (IIR), which ensure the environmental safety (ES) of the urban economy. The studies have established that the functional IIR between the structural elements of the “UWMC” in the composition of this NTS type “NWE – UWMC - UWSC” determines the generalized design and technological solutions, which determine the complex of protective measures to ensure the ES preservation of health and the urban population life quality. Based on the results of complex (theoretical, laboratory, full-scale) studies, constructive and technological solutions have been developed to preserve the diversity of ichthyofauna (juvenile fish, etc.) in the water body, to ensure the protection of the water intake bucket from bottom and suspended sediments, sludge and floating objects coming from the water body, from toxic blue-green algae and fouling with zebra mussel of structural elements and technological equipment as part of the urban water management complex. Functional sequence of IIR structural and technological solutions (STS-1, STS-2, STS-3) between themselves (Fig. 1) provides regulatory requirements for environmental safety.
On the issue of disposal of waste sorption material as an additive in new products’ manufacturing
Authors: Ignatkina Darya , Telyatnikova Victoria , Meshcheryakova Yaroslava , Gizzatova Gulnara
Published: July 2021

Sorption is currently a promising method for purifying wastewater from organic and inorganic substances. The authors have developed a technology for obtaining a granular composite sorbent (GCS), on the basis of large-tonnage production waste - tobacco dust. However, as a result of sorption purification of highly concentrated wastewater from food industry enterprises, a significant amount of waste sorbent is formed, the regeneration of which is economically inexpedient. This article presents the laboratory studies’ results, on the basis of which methods of GCS disposal were developed, exhausted its sorption resource for the new products’ manufacturing in construction industry.
Information technologies for the study of the planned and profile model of the flux creep in the transit channel
Authors: Khetsuriani Elguja , Khetsuriani Teona , Khetsuriani Timur
Published: July 2021

The article presents the inlet chamber computer models for the Beloyarskyin take structure: a computer model of the depth distribution and a computer model of the water level distribution for determining the hydrodynamic structure of the flux creep in the transit channel. To build a computer model, the depth survey of the inlet chamber was used during hydro meteorological surveys. The water level at the survey time is 15.30 m. The construction of a depth distribution computer model in the inlet chamber at the intake structure for the water supply of the Beloyarsky city was carried out by the finite element method on a personal computer in the Multiphysics software product. The uneven distribution of average velocities on the verticals, both along the channel width and length, is explained by the significant expansion of the inlet chamber in the intermediate sections 2-2, 3-3, 4-4, 5-5 in relation to the input 1-1 and output sections. Deepening the channel in the entrance section 1-1 by an average of 1.3-1.5 m will increase its flow rate to 10, 2m3/s or 10 times with an increase in the average speeds on the verticals by 2.0-2.5 times. Such an increase in the flow rate in the input section will lead to an increase in the average speeds in other sections 2-2, 3-3, etc. Hence, the passage of increased flow through the transit channel after clearing a number of shallow areas will create better conditions for preventing algae spread.
Studies to reduce biofouling on metal surfaces of abstraction intakes
Authors: Moskvicheva Anastasia , Fedulova Ekaterina , Gilgenberg Alexandra , Konovalov Oleg , Gizzatova Gulnara
Published: July 2021

Biofouling is one of the main problems of water industry enterprises; many scientific developments are associated with the prevention of biofouling. It is one of the factors of pollution, a decrease in productivity, and also contributes to the occurrence of serious accidents at abstraction intakes (herein after AI). Scientists dealing with corrosion issues in Russia and research to determine the effectiveness of modern methods that reduce corrosion of metal surfaces have found that the nature of the basic cause of corrosion damage is the formation of material destruction products on the inner surface of the metal due to individual components in waste water. This article presents the results of the microbiological composition analysis.
Study of a gas turbine unit energy efficiency
Authors: Legkii Alexandr , Stefanenko Igor , Kudashev Alexey , Zlobin Vladimir , Ermilova Natalia
Published: July 2021

The method of the gas turbine unit and the waste heat boiler gas-air duct circuit modernization is considered. The operation scheme of a gas turbine unit and a waste heat boiler with the use of a catalytic afterburner has been shown. There is also a decrease in nitrogen and carbon oxides in the exhaust steam-and-gas mixture due to a deeper cleaning process of the exhaust steam and gas mixture, which leads to an increase in the service life of the waste heat boiler [1]. A more complete process of heat transfer to the coolant in the furnace section of the boiler is performed due to the cleaner steam and gas mixture in the waste heat boiler and due to a decrease in the boiler tubes growth formation by the combustion products. This makes it possible to reduce the cost of fuel consumption by gas burners of the waste heat boiler. Also, as a result of this process, it is possible to reduce fuel consumption for the needs of heating the feed water and the auxiliary needs of a power unit. This article proposes to use lattice devices in the afterburner, treated with active substances by the ion implantation method, as one of the most promising ways of modifying lattice surfaces [2 – 6]. These processes occurring when the steam-and-gas mixture passes through the afterburner, allow increasing the cycle efficiency factor and limit of maximum allowable concentrations (MAC) emissions for various options for the exhaust steam-and-gas mixture utilization of a gas turbine unit (GTU) and heat supply to the waste heat boiler.
Actual problems for logistics management and strategies of supply chain in Georgia
Authors: Tsetskhladze Leila , Makharadze Nanuli , Chkhaidze Irma , Jabnidze Nato , Baratashvili Nazi
Published: July 2021

In social-economic development strategy, logistics is considered as one of the priority direction to increase the competitiveness of the country. In order to adapt the flexibility of the supply chain, the companies should properly work and carry out such logistics strategy, which allows them to identify the influence of the expected changes and make organizational or functional amendments to ensure the reduction in logistics costs. The development of logistics system contributes the integration of Georgia in global economy space and strengthens its competitive positions on international logistics market. In the work, it’s been studied the potential of increasing the functional load of Georgian ports and the potential of establishing them as logistics centers, it’s been reviewed logistics role, as a vital sector in terms of global trade and as a continuous and uninterrupted delivery of goods during a crisis period of Covid-19 pandemic. Strategies for supply chain has been studied and evaluated by sectoral mark according to expertise, economic-statistical and analytical methods and it’s been defined the role of Georgia in global logistics network and the actuality of involvement in it.
Problems of the formation of marketing communications in the field of management of logistics systems
Authors: Mamuladze Gela , Katamadze Davit , Katamadze Guliko , Mamuladze Giorgi , Bakuradze Ivane
Published: July 2021

The article considers the problems in the field of logistic system management and analyzes the role of marketing communications in solving these problems. Based on the research, it was found that marketing communications can improve the connections established between the individual links of the logistics chain, which determines the effectiveness of the entire economic system and the degree of integration. Relevant research has not been conducted yet in the country, therefore, effective utilization of the concluded recommendations will help to raise the level of management of transport hubs in Georgia. The results of the study can be used by companies working in the field of international maritime transport, air, rail and road. It is assumed that if European and Asian producers increase the shipment of their products through our country from Europe to Asia or vice versa, the effective use of Georgia’s transit capacity (function) will be guaranteed. The methodological basis of the article is bibliographic studies of Georgian and foreign scientists in the field of logistics systems management and marketing, data collection, observation, survey (in-depth interview). The method of data collection is mainly used in local logistics companies, where the situation with the use of marketing communications was analysed.
The main challenges of cruise tourism and statistics of expectations in Georgia
Authors: Abesadze Nino , Kinkladze Rusudan , Giorgobiani Maia , Robitashvili Natalia , Chitaladze Ketevan
Published: July 2021

In parallel with global technologies and transformations, Georgia was intensively reviving and developing all types of tourism, the COVID-19 pandemic slowed the pace of rapid growth in the quantitative parameters of tourism, and then shifted tourism to a phase of economic uncertainty, leaving all types of tourism paralyzed. The main goal of the research was to identify the challenges facing cruise tourism and to develop recommendations for its development.The article discusses the importance of developing cruise tourism for the revival of tourism in Georgia. The potential of cruise tourism is characterized. According to the trends of the world, based on the annual report of the International Association of Cruise Lines for 2020, the statistics of cruises around the world are analyzed.We believe that educational projects should be started for tourism business owners, staff should be trained to give accurate recommendations regarding maritime cruises and COVID regulations, travel companies should be given the opportunity to take low-interest loans if necessary; State support for the promotion and development of tourism, including cruise tourism, is important.
The role of sustainable transport system in the competitiveness of agri-food products
Authors: Saghareishvili Mariam
Published: July 2021

The article discusses the role of sustainable transport systems in competitiveness of Georgian agri-food products. Georgian agri-food products are less competitive on international markets. The country has FTAs with its partners that should make Georgian goods more competitive, at least in terms of price. Transport and logistics is one of the main parts of export, therefore, they have an impact on competitiveness of exported goods. Georgia trades with its neighbour countries, with the EU, China, etc. The EU and China represent huge markets and Georgian government targets to increase export in both directions, but there is a long distance between Georgia and its target markets, therefore it needs a developed transport and logistics system. On the other hand, portions of exported Georgian agri-food products are primary production, which have a shorter lifetime period, that’s why they should be transported in a short period of time, with specific machines. Without development of the transport system it is impossible to achieve sustainable export of agri-food products into Georgia’s target markets. Investments in the system, with tangible strategy and holistic approach can create a sustainable transport system that will increase competitiveness of Georgian agri-food products in international markets.
Logistics models of modernization of distribution and transmission systems for the development of Ukraine as an exporter of green energy
Authors: Kovtun Natalia , Yushchenko Nadiia
Published: July 2021

The article compares scientific facts and analyzes the prospects for the development of the export potential of Ukraine in the field of green energy against the background of an increase in the cost of silver used in the production of solar panels, and due to difficulties in meeting the increased demand for it by mining companies, as well as the expected reduction in the cost of thermonuclear energy due to the rapid implementation of the modified, thanks to advanced artificial intelligence systems, the design of the SPARC reactor. Economic and mathematical models for the regulation of stocks of material resources and equipment, including silver-containing ones, are proposed, which make it possible to study the invariants of managerial decisions and minimize costs. The main factors affecting the volume of formation of stocks are generalized, the types of costs associated with the management of stocks of material resources, the main types of economic and mathematical models for regulating stocks and computer programs available on the market that implement models and methods of supply management and stocks of material resources are systematized.
Suez Canal blockage: an analysis of legal impact, risks and liabilities to the global supply chain
Authors: Lee Jade Man-yin , Wong Eugene Yin-cheung
Published: July 2021

The global supply chain currently thrown into chaos due to the Suez Canal incident. On 23 March 2021, the Suez Canal, one of the most heavily used shipping routes, was blocked by vast container ship – the Ever Given. Affecting over 400 vessels scheduled to pass through the Canal in the East-West and West-East directions. Such vessels experienced a dilemma of the use of routes and schedules. Other victims included vessels that were scheduled to arrive at/pass through the Canal, shippers, consignees, ship operators, ship owners, and container terminals. About USD$15 to 17 billion has been held up. This paper aims to reveal the potential damage caused to parties involved and examine the liability of parties involved. Specifically, the impact and legal consequences of the obstruction such as how the scope of general average applies as well as the possible solutions to minimise damage are discussed, followed by future developments. These results suggested that maritime transport support global supply chain linkages and economic growth, any disruption could bring huge impact and costs on various stakeholders along the supply chain. On this basis, the world should learn a lesson from this incident and the need for thoroughness prevention measure should be considered.
Financial and investment processes in ensuring the development of marine infrastructure
Authors: Hryshyna Larysa , Pogoryelova Elena , Karas Petro , Mihai Natalia , Khmarska Irina
Published: July 2021

The article identifies the place and importance of financial and investment processes in ensuring the development of maritime infrastructure as a component of the maritime complex of Ukraine. The current state of maritime infrastructure and the level of its use in the transformational conditions of the domestic economy are studied. Factors influencing the functioning and development of marine infrastructure are identified. The main directions of intensification of financial and investment processes to ensure the effective functioning and development of the maritime industry and its infrastructure are identified.
Malignes Melanom
Authors: Schmale Ine
Published: July 2021

Das „Discrete Choice Experiment“ (DCE) ist eine Methode aus der Marktforschung, bei der Objekte in Eigenschaften (Attribute) und deren Ausprägungen (Prozesse) aufgeschlüsselt werden und das Zielpublikum immer zwischen 2 hypothetischen Objekten das präferierte Objekt auswählen muss. Diese Vorgehensweise wurde verwendet, um den Einfluss von Komorbiditäten auf die Präferenz einer Therapie bei Melanom-Patienten zu bestimmen.
Strahlenrisiken nach Radiojodtherapie
Authors: Kreißl Michael C. , Reinecke Maximilian , Luster Markus
Published: July 2021

Bei der Anwendung ionisierender Strahlung ist prinzipiell die Induktion von Zweitmalignomen möglich. Dies trifft auch auf die Radiojodtherapie beim differenzierten Schilddrüsenkarzinom bzw. bei benignen Erkrankungen der Schilddrüse zu. Bei der in der Regel höher dosierten Radiojodgabe zur Behandlung des differenzierten Schilddrüsenkarzinoms ist der Effekt in einigen groß angelegten retrospektiven Studien nachweisbar und muss dem therapeutischen und auch diagnostischen Nutzen gegenübergestellt werden. Das Strahlenrisiko bei der Behandlung von gutartigen Schilddrüsenerkrankungen ist als sehr gering einzuschätzen. Eine jüngst publizierte Studie mit sehr langem Follow-up beschreibt eine dosisabhängig steigende Sterblichkeit an Zweitmalignomen. Eine am gleichen Kollektiv durchgeführte weitere Analyse fand jedoch nur eine erhöhte Sterblichkeit im Vergleich zur Normalbevölkerung bei Langzeitthyreostase und nicht nach Radiojodgabe.

Insgesamt gilt es, im Kontext von Radiojod auch bei der Interpretation von Studiendaten, die Strahlenrisiken mit den weiteren Risiken, den Vorteilen und Vorzügen bzw. Nachteilen der alternativen Therapieoptionen in Bezug zu setzen.
Gewebebasierte Diagnostik des Lungenkarzinoms – Morphologie und molekulare Diagnostik
Authors: Mairinger Thomas
Published: July 2021

Die gewebebasierte Diagnostik des Lungenkarzinoms hat in der letzten Zeit mit der Einführung individualisierter Therapiemöglichkeiten an Bedeutung gewonnen. Die Basis der Diagnostik ist nach wie vor die lichtmikroskopische Beurteilung von histologischen Schnitten. Die Morphologie und das klinische Staging sind wegweisend für die weitere leitliniengerechten Therapie im Rahmen der sogenannten „individualisierten Therapie“ oder „Präzisionsmedizin“, bei der gezielt Veränderungen in intrazellulären Signalkaskaden therapeutisch beeinflusst werden.

Neben dem Eingriff in diese Signalkaskaden ist ein weiterer therapeutischer Ansatz der Versuch, mittels der Immuncheckpoint-Inhibitoren tumorimmunologische Reaktionen des körpereigenen Immunsystems zu initiieren bzw. zu ermöglichen. Die Stratifizierung von für diese Therapie geeigneten Patientengruppen erfolgt über den gewebebasierten immunhistochemischen Nachweis der entsprechenden membranösen Rezeptorexpression auf Tumor- oder Immunzellen.

Aus pathohistologischer Sicht spielen prädiktiv-diagnostisch sowohl Überexpression von Rezeptoren, als auch andere genetische und epigenetische Veränderungen (z. B. Inversionen, Translokationen, Methylierung etc.) in den Tumorzellen eine richtungsweisende Rolle.
Metastasiertes kastrationssensitives Prostatakarzinom
Authors: Krome Susanne
Published: July 2021

Die meisten rezidivierten Prostatakarzinome sprechen zunächst auf eine Androgendeprivation an. Zur Verzögerung einer Kastrationsresistenz und Progression kommen ergänzend Docetaxel, Abirateron, Apalutamid und Enzalutamid in Betracht. Die internationalen Leitlinien geben keine eindeutigen Empfehlungen zur Therapiewahl, da bislang außer für die Chemotherapie kaum Daten aus Head-to-Head-Studien vorlagen. Eine Netzwerk-Metaanalyse verglich jetzt die Effektivität und Sicherheit der verfügbaren Substanzen.
Chronische myeloische Leukämie
Authors: Schmale Ine
Published: July 2021

Die therapiefreie Remission (TFR) ist ein neues Therapieziel für Patienten mit chronischer myeloischer Leukämie (CML), welches ein anhaltendes tiefes Ansprechen voraussetzt. Langzeit-Daten von BCR-ABL1 Tyrosinkinase-Inhibitoren (TKIs) wie Nilotinib und Bosutinib zeigen tiefere Remissionen über mehrjährige Zeiträume. Für Patienten in der rezidivierten oder refraktären Situation zeigt eine klinische Studie mit dem ersten Vertreter der neuen Wirkstoffklasse der STAMP-Inhibitoren vielversprechende Ergebnisse.
MET-Exon-14-Skipping-positives NSCLC
Authors: Springer Günter
Published: July 2021

Patienten mit nicht-kleinzelligem Lungenkarzinom (NSCLC) und MET-Exon-14-Skipping als onkogenem Treiber profitieren von dem MET-Inhibitor Tepotinib. Primär therapienaive und vorbehandelte Patienten oder Patienten mit Hirnmetastasen haben einen vergleichbaren Nutzen.