Problem Statement Research Articles

Удосконалення методу визначення коефіцієнта ущільнення асфальтобетонної суміші

Problem Statement. During sample preparation for reforming, there is a separation of cut mineral materials, which can affect the composition of the asphalt concrete mixture and lead to significant differences compared to the actual composition. The analysis of foreign sources revealed that the compaction coefficient is determined by the ratio of the average density of cores to the average density of samples made from the mixture used for constructing the road layer. A historical review of regulatory documents shows that the domestic method for determining the compaction coefficient has been in use for over 40 years. Additionally, a literature review found that this issue has not been adequately addressed. Thus, there is a need to study the effect of cut mineral material separation on the properties of reformed samples and the value of the compaction coefficient. Objective. To improve the method for determining the compaction coefficient of asphalt concrete mixture.

Розрахунок несної здатності аркової дорожньої споруди з гофрованого металу аналітичним способом

Introduction. One of the possible options for a simple, practical design of an arched road structure (small bridge) made of corrugated metal is considered, which can be considered as one that is more accurate and labor-intensive for the design of such a structure under the road pressure, as the “structure – soil” system for finite element method. Problem Statement. Regular normative and methodological documents for the design and maintenance of road structures (culverts, small bridges, tunnels) made of corrugated metal provide a simple formula for the structure of the structure and deformation of the body for such structures round pipes. The world is constantly streaming a wider range of rational and fairly simple types of road structures. Purpose. To show one of the possible ways of calculating an arched road structure made of corrugated metal on the basis of generally accepted initial provisions and a simple, understandable calculation scheme is the goal and task of this work.

Огляд методичних підходів до планування робіт з експлуатаційного утримування автомобільних доріг

Introduction. The development of Ukraine's road network under current conditions is characterized by limited funding for road maintenance. At the same time, determining the scope and list of works based on the actual operational condition of the roads is extremely important, as it significantly affects the safety and comfort of road users, as well as the efficiency of vehicle operation. A standard norm is used to determine the planned scope of work, which is averaged for roads of the corresponding category. This simplifies calculations, but such an approach does not precisely establish the annual planned volumes of maintenance work for a specific section, as it does not consider its actual operational condition. Given the current level of funding, it is relevant to develop a methodology for determining the planned volumes and lists of maintenance work that is accurate enough, but does not require significant costs for road section inspections. Problem Statement. The determination of the scope of maintenance work is based on a comprehensive analysis of the road surface condition, forecasted traffic loads, and the allocation of budgetary resources. However, under martial law, the country’s priorities have shifted, with the focus on ensuring state defense, providing humanitarian aid, etc. Based on the current trends in the development of Ukraine’s road industry, the main task is the rational use of limited financial resources and maintaining roads in proper operational condition.

Аналіз підходів щодо оцінювання просочування опадів у ґрунт узбіччя автомобільних доріг

Introduction. The article investigates the impact of atmospheric precipitation on road structures, specifically focusing on water infiltration into the roadside soil along highways, which is a critical aspect of road infrastructure maintenance. Ensuring the reliable operation of the roadway is becoming increasingly important due to rising traffic loads and climate changes that result in increased precipitation. Continuous moisture penetration into the road embankment can lead to road degradation, creating risks for safe traffic movement and necessitating frequent repairs. It is essential to develop and implement effective methods for assessing moisture infiltration into the soil, which will help ensure the longevity and cost-efficiency of road operation. Problem Statement. With climate change and increasing intensity of precipitation, the issue of assessing its impact on road structures becomes more relevant. Moisture accumulation in the road embankment can disrupt the stability of the soil foundation, reducing the load-bearing capacity of the road surface. Research aimed at analyzing rainfall infiltration and its effect on road structures will allow the implementation of effective solutions to maintain the operational condition of roads.

Ефективність застосування світлофорів та їх роль у забезпеченні безпеки дорожнього руху

Introduction. The development of motor transport inevitably leads to an increase in traffic intensity, resulting in challenges related to ensuring the safety and comfort of road users, particularly at uncontrolled intersections and pedestrian crossings, which are areas of heightened risk for road accidents. Problem statement. The high likelihood of traffic accidents occurring at uncontrolled road intersections and pedestrian crossings necessitates the implementation of measures aimed at ensuring the safety of all road users, particularly pedestrians and cyclists. Purpose. Ensuring road safety, reducing the likelihood of traffic accidents, and providing comfortable travel conditions for road users. Materials and methods. The current regulatory acts and normative documents regarding traffic control devices, particularly traffic lights, as well as statistical information on road accidents in Ukraine, have been analyzed.

абезпечення інноваційного розвитку національної економіки на основі реалізації економічних інтересів учасників систем кластерного партнерства в умовах нових викликів

Introduction. Recent years have been a challenge for the Ukrainian economy. The full-scale war caused significant destruction, interrupted production chains and led to massive migration of the population. In such circumstances, the issues of economic recovery and increasing its competitiveness are particularly acute. The cluster approach, as a proven tool for economic development, can be an effective mechanism for overcoming the consequences of war and ensuring sustainable growth. In the developed countries of the world, there is an increase in cluster formations, where the organizational and functional structures do not change, but the process of joint interaction intensifies, which creates favorable conditions for the development of cluster partnerships based on integrated and quasi-integrated relationships and the economy of the territories where they are based. Problem Statement. The effectiveness of cluster partnerships has been proven theoretically by foreign scientists and confirmed by foreign examples. However, modern approaches to the development of cluster partnership systems of the national economy and the implementation of cluster policy in Ukraine do not consider military consequences, the specifics of the territories, the features of cluster partnership as a network interaction of integrated and quasi-integrated business structures, government and scientific institutions, synergistic links between them, regional, sectoral and other aspects. The purpose is to study the features and formulate directions for ensuring the innovative development of the national economy based on the realization of the economic interests of participants in cluster partnership systems in the face of new challenges. Methods. The study used general scientific and special methods, in particular, description, analysis, theoretical generalization, synthesis. Results. The directions of state support for the innovative development of the national economy based on the realization of the interests of participants in cluster partnership systems, which are implemented by intensifying the policy of cluster partnership in the innovation sector and are an alternative option for the formation and support of initiatives in the implementation of innovative projects. A characteristic of cluster partnership systems is the acquisition of forms of mutual assistance through cooperation in the regulatory policy of innovative development of the country's economy. The private sector is responsible for increasing the amount of funding for the innovation process, directly implements and ensures the commercialization of innovations. The state, first of all, provides legislative, financial, and informational support, and undertakes the training of highly qualified personnel. Conclusions. State support is the driving force behind the development of cluster partnership systems, which are implemented through the intensification of cluster partnership policy in the innovation sector and is the only alternative option for the formation and support of initiatives in the implementation of innovative projects for the development of the national economy in the post-war period.

Оподаткування і фіскальна соціологія: фінансова думка Заходу та уроки для України

Introduction. In the process of fair interaction between authorities and taxpayers, a relationship of trust is created. This trust ensures support for government fiscal initiatives from the business sector. Conversely, if the relationship is not transparent and equitable, it can lead to a passive or even negative attitude towards taxes, thereby reducing the efficiency of the tax system. Problem Statement. There is a gap in Ukrainian fiscal theory, which is still underdeveloped in terms of fiscal sociology. Compared to Western countries, where fiscal sociology has already become an integral part of economic analysis, in Ukraine this issue has been studied only by a narrow circle of scholars. This limitation necessitates a deeper study and integration of sociological approaches into financial science, because without it, Ukrainian researchers and policy makers lose the opportunity to gain a more complete understanding of the interaction between economic and social processes. The purpose is to substantiate the directions of integration of fiscal sociology into Ukrainian financial theory and to develop recommendations for its inclusion into Ukrainian financial practice. Methods. The methods used are systematic, structural-functional, comparative analysis, analogy, grouping, description, comparison and generalization. Results. It is proved that by integrating fiscal sociology, Ukrainian fiscal theory can benefit from a more nuanced understanding of the socio-economic factors influencing fiscal policy. Such integration could lead to more effective policy making and a deeper understanding of the economic challenges facing Ukraine. Conclusions. Ukrainian academics and policymakers should prioritize the interdisciplinary study of fiscal policy, taking into consideration the rich tradition of fiscal sociology in the West. Joint efforts should be made to develop tax policies that strengthen state legitimacy by addressing issues of fairness, transparency, and trust. Strategies for managing public debt and improving tax morale should be a central element of fiscal policy to ensure that Ukraine's financial system can withstand socioeconomic pressures and contribute to long-term stability and development.

Монетарна ентропія в умовах економічної глобалізації

Introduction. Changes occurring in the nature of money in the context of globalization have long been of interest to economists. Instead, the events of recent years have shown that such changes can also be caused by profound transformations that are natural ones and subject to general physical laws. Problem Statement. Establishing the dependence of the further development of money as an economic category on the action of the second law of thermodynamics. The purpose is the analysis of scientific ideas at the junction of economics and physics (ecophysics) and their spread to the monetary sphere ,in particular considering the manifestation of monetary entropy in the process of the international monetary system. Methods. General scientific and special methods are used: analysis, synthesis, description, comparison, theoretical generalization and abstract-logical analyses. Results. This publication introduces the concept of monetary entropy as a state of chaoticization of the essence of money (entropy of money) and the monetary system as a whole. The development of monetary entropy is considered as the result of cyclical development according to the Hegelian model “thesis-antithesis-synthesis”, which allows to avoid complete chaosization of the monetary sphere due to its transition to a new level of the spiral of development. The current state of the development of money as an economic category and the international monetary system as a whole, caused by the impact of the globalization process on them, proves that they are at the stage of another transition from entropy to negentropy, which can lead to the emergence of Global Money. Conclusions. Turning to the issue of predicting the future of money, it should be noted that there is an opinion that soon money will simply become a relic of the past and disappear altogether, leaving the probable technological singularity as one of its consequences, the very liquidation (more precisely, the senselessness of existence ) of money as an economic category. One of the possibilities of the technological singularity is the emergence of a post-scarcity society in which there will be a surplus of resources and the needs of every member of society will be fully satisfied (a variant of capitalist communism, when even an unconditional basic income will appear to be an unacceptable minimum for satisfying needs, because the principle from each according to his abilities to each according to his needs will be implemented. However, the change will not happen overnight, so there will most likely be a transition period during which humanity will still use money and the concept of money will evolve rather than disappear completely.

Системи перерозподілення транспортних потоків. Транспортні розв'язки. Застосовувані терміни

Summary Introduction. In the introduction to the paper, the common questions concerning the assurance of the terminological congruence of national standards’ provisions, when being harmonized, with provisions of regional or international standards were outlined and also important sources of appropriate regional information in the sector of the transport infrastructure were identified. Problem statement. The issue of the paper concerns terminological matter in the domain of definitions for the interchange systems on motor roads peculiarly those constituting international traffic arteries and for elements of such systems. Purpose. The paper is aimed on the analysis of scientific sources and provisions of the EU regulatory acts to state the problems and develop the propositions concerning initial points for the enlargement of the structure of terminology relating the interchange systems on motor roads constituting international traffic arteries.

Перспективи застосування жорсткого дорожнього одягу під час будування автомобільних доріг та удосконалення підходів до його конструювання і розрахування

Introduction. This article examines the issue of improving the methods of designing and calculating rigid road surfaces, outlined in the DSTU project “Guidelines for the Design of Rigid Road Surfaces” (hereinafter referred to as the DSTU project). The specified methods were developed on the basis of domestic and global experience in the design of highways with rigid road surfaces, analysis of current legal acts, regulatory documents, technical literature related to the object of standardization, taking into account the availability of modern road construction materials and technologies. density of traffic flow, diversity of subsoil, including in complex engineering and geological conditions, peculiarities of road and climatic regions of Ukraine, etc. Problem statement. The need for improvement and a unified approach to the design of rigid road clothing, taking into account the peculiarities of its operation, with the determination of the appropriate parameters depending on the initial data and the effective use of material and technical resources.

Впровадження автоматизованих систем моніторингу мостових споруд в Україні: Світовий досвід та національні перспективи

ntroduction. Highway bridges are an important element of the transport infrastructure of any country, and Ukraine is no exception. Their safe operation is critical to ensure the sustainable functioning of logistics systems and economic development of regions. However, due to constant loads, the impact of natural factors and insufficient funding for maintenance, a significant number of bridges in Ukraine are in poor technical condition. Accordingly, it is necessary to take measures to diagnose the condition of bridges in a timely manner and prevent possible accidents. In this context, automated condition monitoring systems (ACMS) are an effective tool for ensuring the smooth operation of such structures. Problem Statement. There are more than 16 thousand bridges on public roads of national importance in Ukraine, more than half of which do not meet modern standards for dimensions and load capacity. The problem is particularly acute for bridges that have been in operation for more than 40 years, as they are more prone to accidents. Due to the lack of systematic monitoring and control of the technical condition of such structures, there is a threat of their destruction. In the world practice, automated monitoring systems are actively used to prevent such situations. In Ukraine, the need to implement such systems is becoming increasingly relevant in the face of increased requirements for infrastructure security.

Про тимчасове навантаження на аркові споруди з гофрованого металу під дорожнім насипом

Introduction. The issue of features of formation and practical calculation of temporary moving load from vehicles on arched structures made of corrugated metal under the road embankment is considered. These features are related to the scheme of static work and deformation of a relatively flexible structure — mainly to bending under the influence of the prevailing vertical pressure from the soil of the embankment and in the conditions of the transfer of a temporary load through the soil of the embankment, which distributes this load in a certain way. Problem Statement. In the current regulatory and methodological documents regarding the design of bridges and pipes, information on the rules for determining the amount of temporary moving load on pipes under highway embankments is limited to instructions regarding the parameters of a typical scheme of wheel loads (NK-100 or NK-80) and regarding the distribution of properties of the soil of the embankment, without setting out the methods and formulas necessary for practical calculations, which complicates the design to a certain extent. Normative and methodical documents directly related to the design of road structures made of corrugated metal also do not contain sufficiently complete and correct information on this issue.

Winter maintenance, snow removal, winter slipperiness, use of de-icing materials and their environmental impact

Introduction. One of the most important road works is road maintenance work, which includes technical supervision of the road, road structures and right-of-way for timely detection and elimination of defects, ensuring the operation of road elements, including artificial structures, in different periods of the year, in particular, in the winter period, keeping them in proper operating condition, and others. Problem statement. The performance of works on winter maintenance, namely the use of methods of combating snow drifts, elimination of winter slipperiness, has both a positive and a negative impact on the environment, which is due to the use of technical salt as one of the methods of ice prevention and elimination. Such melting anti-icing material accelerates the destruction of the road surface, reduces productivity, pollutes the soil and water bodies. Purpose. Review of the main road works performed by road enterprises during the winter maintenance of highways and their consequences for the condition of the road surface, right-of-way, soil and water bodies. Analysis of the experience of other countries regarding ecological approaches aimed at the winter maintenance of highways, taking into account the consequences for the ecosystem.

Дослідження впливу різних наповнювачів на атмосферостійкість асфальтобетонів

Introduction. The properties of bituminous-mineral materials are determined by the bonds formed between individual mineral grains and depend on the characteristics of the bitumen, the thickness of the bitumen layer covering the mineral grains, as well as the interaction processes between the mineral materials and bitumen at their joint interface. To ensure a strong and stable bond between the grains, the bitumen must evenly cover the surface of the mineral materials with a thin layer. To improve the strength of road pavement made from bituminous-mineral material, it is necessary for the maximum amount of bitumen to be adsorbed by the mineral material, minimizing the content of free bitumen. Problem Statement. Depending on the nature of the mineral material and the chemical composition of the bitumen, the properties of its thin layers change in various ways. On an active mineral surface, the strength of the bitumen in a thin layer increases as the thickness decreases, while on an inactive surface, the strength of the bitumen remains largely unchanged with a decrease in layer thickness.

Аналіз технічних вимог і методів випробування матеріалів для дорожньої розмітки, як підґрунтя для нових стандартів

Introduction. Horizontal road markings are a crucial element of road safety, traffic organization and flow management. They also enhance the road's capacity by more than 20 % and reduce the number of road traffic accidents. The modern development of the road sector is characterized by increasing demands on road markings. Today, the choice of materials for road markings is vast and includes: paints, cold and hot-applied plastics, polymer tapes, pre-formed products, retroreflective glass microbeads, and more. Each material has a unique set of properties related to durability, retroreflectivity, application cost, and life cycle. Problem Statement. The expanded range of materials complicates the selection process for road markings. The choice must account for various factors, including the type of marking, road conditions (curves in plan, intersections, roads with high traffic volume, etc.), road surface material, and its roughness. To select the proper materials for road markings, road traffic load level and expected service life must be considered. To make an optimal choice, it is essential to test the quality characteristics of materials through evaluations of their physical-mechanical, technological, and functional properties.

Machine learning modelling the rut depth of WMA mixtures with variable reclaimed asphalt pavement (RAP) and foamed bitumen content

ntroduction. Rutting of flexible, super flexible and semi-rigid pavement structures is a typical and frequently decisive condition parameter, form of pavement deterioration. That is why, any research result in the field can have of high importance for the road engineers. Problem Statement Rutting poses a significant challenge to asphalt pavements, causing permanent deformation under heavy loads, particularly in warm and wet conditions. Purpose. This pavement distress type has — in addition to riding comfort challenges — important traffic safety consequences (e.g. aquaplaning), as well. The research work concentrates on the influence of the use of warm mix asphalt, reclaimed asphalt material and foamed bitumen binder on the rut depth of asphalt pavements.

A Bibliometric Studies: Digital Learning and Teacher Teaching Quality

This paper presents a comprehensive bibliometric analysis aimed at exploring the intersection between digital learning and teacher teaching quality. In recent years, the landscape of education has been significantly influenced by advancements in digital technology, leading to the widespread adoption of digital learning platforms. An overview of the importance of digital learning and high-quality teacher instruction in modern education is given in the introduction section. The problem statement outlines the main obstacles and gaps in the research on digital learning and the calibre of teaching methods. By elucidating these issues, the study aims to address pertinent questions concerning effective pedagogical strategies in the digital era and ways to enhance teachers’ effectiveness. Methodologically, this study employs bibliometric analysis techniques and VOSviewer version 1.16.20 to examine a corpus of scholarly publications retrieved from reputable databases. The focus is on identifying relevant literature, analysing citation patterns, and mapping out thematic trends and research trajectories. Through systematic data extraction and analysis, this approach enables the synthesis of existing knowledge and the identification of prominent themes and research clusters. The results of the bibliometric analysis reveal significant insights into the scholarly landscape of digital learning and teacher teaching quality. Findings include the identification of seminal works, influential authors, key research themes, and emerging trends. In conclusion, this study offers valuable insights into the current state of research on digital learning and teacher teaching quality. By synthesizing existing knowledge and identifying research gaps, it provides a foundation for future research endeavours aimed at advancing our understanding of effective educational practices in the digital age.

Linguistic Characteristics In The Research Background And Problem Statement In The Doctoral Thesis Of Arabic EFL Students In Malaysia

This study explores the linguistic features within the move structures of the research background and problem statement sections in Chapter One of PhD theses written by Arab students in Malaysia. The analysis focuses on four key language elements: verb tense, modality, voice (active and passive), and personal pronouns. A corpus of 30 theses was analyzed to determine common linguistic patterns, revealing significant insights into the language choices of these academic writers. The study employs concordance and hand-tagged analysis to examine verb tense and voice, with manual verification for modality and personal pronouns to ensure accuracy. Eight distinct verb tenses were identified, with the present simple tense being the most frequently used, representing 55.30% of the total instances. This indicates a preference for focusing on current knowledge and ongoing research. In contrast, the past simple and future simple tenses were used to describe past methodologies and future implications, respectively. Modal auxiliaries play a crucial role in conveying sentiments and opinions. The study identified seven modal verbs, with 'can' being the most commonly used, suggesting a focus on possibility over obligation. The analysis of voice patterns revealed a higher occurrence of active voice (79.66%), especially in moves that conveyed up-to-date knowledge. In contrast, passive voice was more common in methodological descriptions, indicating a focus on the actions or subjects rather than the actors. The study also examined the usage of personal pronouns, finding a higher frequency of third-person pronouns, suggesting a more objective narrative style. These findings offer valuable insights into the linguistic choices of Arab EFL students in academic writing, providing a deeper understanding of their communicative intentions and alignment with academic discourse conventions. The results can guide future research on linguistic patterns in academic writing and help educators support EFL students in improving their writing skills.

Investigation of Tandem Queuing Systems Using Machine Learning Methods

This paper considers tandem queuing systems with limited buffer sizes in each phase. The system handles an incoming correlated MAP flow and the service time obeys a PH-distribution. Models of such systems and methods for their investigation are briefly reviewed from the historical perspective. According to the review, the problem statement presented below, the methods proposed for solving this problem, and the corresponding results are novel. An accurate algorithm for calculating the performance characteristics of low-dimensional tandem queuing systems is described, including an estimate of the algorithm’s complexity. An approach using both machine learning and simulation modeling is suggested for the investigation of high-dimensional tandem queuing systems. Numerical analysis results are provided to show the effectiveness of machine learning methods for estimating the performance of tandem queuing systems.

A Systematic Review of Synthesis and Application Base Nanomaterial using Pandanus Extract Plant

This systematic review investigates the production and utilization of nanomaterials using an extract from the Pandanus amaryllifolius plant. The introduction outlines the imperative role of nanomaterials in addressing the challenges faced by conventional materials, emphasizing the need for sustainable and efficient alternatives. Note that the problem statement underscores the existing gaps in the literature regarding the comprehensive exploration of Pandanus-based nanomaterials toward applications. The study conducted an extensive search on Scopus and Web of Science (WoS) databases, employing specific keywords. The exhaustive search produced 17 articles, which were classified into three primary themes: (1) Nanomaterials synthesis and utilization using extracts from Pandanus amaryllifolius, (2) Characteristics and uses of nanomaterials biosynthesized through biological processes, and (3) Bioactivity and practical applications of materials derived from plants. The review thoroughly examines the findings related to these specific topics, offering valuable information on the various uses and characteristics of nanomaterials produced with the help of Pandanus amaryllifolius extract. This paper enhances the comprehension of the potential applications of Pandanus-based nanomaterials in different fields by providing a detailed analysis of the current research. It serves as a significant reference for practitioners as well as researchers intrigued by the combination of plant extracts and nanotechnology.