bluuebunny/crossref_metadata_2025 huggingface dataset:
Candidates resume analyzer using artificial intelligence
Authors: Rebrii Maksymilian S. , Zinovatna Svitlana L.
Published: October 2024

In the modern recruitment process, where the number of candidates and job vacancies constantly increases, automating resume analysis becomes critically important for efficient selection. This paper focuses on developing a system for automated resume analysis using artificial intelligence, specifically the OpenAI model (ChatGPT). The paper thoroughly examines the system's components, structure, and functional capabilities. The system consists of several key modules: the user interface ensures interaction with users, the Application Programming Interface Gateway facilitates data exchange between the interface and the server, and the authentication module controls system access, ensuring user security. The main part of the system's business logic is implemented on the server, which interacts with the natural language processing module, utilizing the ChatGPT model for processing resume text data. The use of natural language processing technologies allows the system to automatically extract and analyse key elements of resumes, such as education, work experience, skills, and certifications of candidates. This significantly speeds up the processing of large volumes of resumes, improving selection efficiency and accuracy. Data obtained during the analysis is stored in a PostgreSQL database, ensuring reliable storage and quick access for further processing. The paper also emphasizes the importance of integrating the system with other recruiting platforms and databases for more efficient management of the hiring process. Such integration allows for automatic synchronization of job vacancies and candidates, optimizing the search and selection process. Additionally, the paper highlights the key challenges associated with automating resume processing, such as the diversity of resume formats submitted by candidates, differences in data structure, and potential errors in automatically recognizing important information. Despite these challenges, the use of artificial intelligence and natural language processing methods significantly enhances the productivity and accuracy of recruitment processes. Thus, the developed automated resume analysis system based on Artificial Intelligence can become a significant tool in the modern candidate selection process. Its functionality not only enables quick and accurate resume analysis but also allows integration with other HR systems, simplifying the recruitment process, reducing data processing time, and improving selection accuracy.
A study on the effectiveness of web applications for publishing translations of oriental literature
Authors: Kozachenko Dmytro O. , Sychkov Vitalii S.
Published: October 2024

The article analyzes existing websites for publishing and reading translations of literary works, with an emphasis on identifying their main problems and shortcomings. Three types of such sites are described: universal, specialized, and oriental literature-oriented. Each type has its own peculiarities, but they all face similar problems, including a limited choice of content, difficulties in finding materials, and inconvenient user interface. The main problem with specialized websites created by a single team of translators (e.g., Silver Raven) is the limited number of available works, as well as the inconvenience and time-consuming search for the right job due to the need to visit the website of a new team of translators every time. The design is often mediocre and inconvenient for users due to a lack of experience in website development and limited resources. Some teams do not even have their own websites and work on third-party platforms, such as Telegram. As for universal sites such as Wattpad, the main problem is the lack of a specialized filter for translated works, which makes it difficult to find them. In addition, there are shortcomings in the design of the reading pages, where a lot of free space is not used and the text is difficult to read due to inappropriate size and formatting. Specialized sites for oriental literature, such as uAuthor and Baka, also have their problems. For example, uAuthor does not allow reading works directly on the site, which creates additional inconvenience for users. Baka, while providing such a possibility, has a complex filtering system and limited tools for adding and editing text. The article concludes that the existing platforms do not fully meet the needs of translators and readers of such a type of oriental literature as ranobe, which prompts the development of a new web application. The proposed solution is to develop our own web application specifically aimed at publishing and reading works. The main attention will be paid to the design of both the website and the text editor to ensure ease of use for translators and readers. Another solution is to create a web platform of several web services that are interconnected using the composite web service design and modeling method.
In-Memory modelling and simulations
Authors: Hahanov Vladimir I. , Chumachenko Svitlana V. , Litvinova Eugenia I. , Obrizan Volodymyr I.
Published: October 2024

A mechanism for modeling faults as addresses on smart data structures is proposed, which excludes the algorithm for modeling input test sets to obtain a test map of logical functionality. Smart data structures are represented by a logical vector and its derivatives in the form of truth tables and matrices. The test map is a matrix whose coordinates are defined by the combinations of all logical faults that are tested on the binary sets of the exhaustive test. The construction of the test map is focused on the architecture of in- memory computing based on read-write transactions, which makes the simulation mechanism economical in terms of simulation time and energy consumption due to the absence of a central processor. A logical vector as a single component of input data does not require synthesis into a technologically permitted structure of elements. Synthesis of smart data structures based on four matrix operations creates a fault test map like addresses for any logic. The proposed mechanism is focused on the service of SoC IP-cores under the control of the IEEE 1500 standard. The proposed mechanism has no analogues in the design and test industry in terms of simplicity and predictability of data structure sizes and the absence of a test set modeling algorithm.
Tasks of visual crowd analysis in intelligent video surveillance systems
Authors: Dobryshev Ruslan Ye.
Published: October 2024

Modern urban population growth creates challenges for public safety, in particular due to crowds. This stimulates the development of new crowd management methods that require automated analysis. Visual crowd analysis based on computer vision technologies is a key tool for solving these problems. The development of deep learning has significantly improved the monitoring systems used for urban surveillance, social distancing control, transportation and event management. However, crowd analysis remains challenging due to occlusions, scale variations, unpredictable movement patterns, and complex behavior. To overcome these challenges, new algorithms, models, and large-scale datasets are needed to enable real-time analysis. The main tasks include people counting, object detection, motion analysis, behavior recognition, and anomaly detection. Deep neural networks and transfer learning significantly increase the accuracy and adaptability of such systems, which helps to improve public safety and manage the flow of people.
Development and applications of computer science in Poland during the communist rule
Authors: Popiński Krzysztof
Published: October 2024

In view of the reluctance with which cybernetics was treated in the Stalinist times in the USSR and other countries of the communist camp, the research on digital machines became possible on a larger scale in Poland only from the mid-1950s. As a result of the work carried out at that time in several scientific and research units, the first Polish computers based on electronic tube technology were created. Their implementation to wider production was entrusted by the central authorities in the early 1960s to the Wroclaw Electronic Works “Elwro”. The company also undertook to manufacture digital machines “Odra” of its own design. They were widely used in science, administration, communication and industry – both in Poland and abroad, primarily in the member states of the Council for Mutual Economic Assistance. Then a few more plants were launched, which cooperated as part of the “Mera-Elwro” group. Since the late 1960s, an important impulse in the creation of local IT systems were internships of Polish IT specialists in the USA and the UK, as well as software brought to the country together with the IBM and ICL machines. By the end of the 1960s, about 30 models and prototypes of digital machines had been created in Poland, which gave it a leading position among communist countries. The situation changed in the early 1970s when Poland lost its position among the Eastern Bloc countries by introducing the production of machines from the Unified System Series (ЕС ЭВМ), imposed by the USSR. At that time, Polish exports were mainly based on products from the machinery industry, while the sales of electronic products and software sharply declined. The attempt to create a national IT system, undertaken in the 1970s, also ended in failure. This was due not only to technical or financial problems but also to the government's fears of losing control over information about the state of the economy or social processes. The crisis of the 1980s significantly limited orders for Polish computers, which, during the PC revolution, remained at the stage of specialized digital machines for large enterprises and institutions. The production of Polish microcomputers did not develop on a larger scale due to a shortage of components imported for hard currency, high taxes, and the lifting of restrictions on the import of Western computers. As a result, although Poland carried out large-scale development and production of digital machines until 1989, trained many specialists to work with them and implemented numerous applications, this effort did not bring the expected results.
Computer simulation as a new cultural practice of mathematical model in cyborgization and epistemology
Authors: Lys Daria A. , Gavrilenko Olena V. , Novikov Viktor O.
Published: October 2024

The latest achievements and plans of biotechnology related to the creation of human hybrids are something akin to those myths and archetypes of the “cyberman” that have accompanied humanity throughout its history. Therefore, modern scientific experiments in this area can be perceived as a kind of continuation as a practical implementation of imaginary experiments and fantasies about the “cyberman”. Along with this, the perception of biotechnological achievements by society is largely determined, to which they are published through the prism of myths, works of literature and cinema, that is, such specific images as the Minotaur, Frankenstein, Ichthyander and other mixmorphic characters. The work uses a comparative method, which implies a comparative historical analysis to present the development of experiments to create a cyberman, as well as to review the development of the “cybercreature” motif in culture. The work also analyzes philosophical literature devoted, on the one hand, to the problem of human cyberbeings, and on the other, to understanding the boundaries of intervention in the genome and human nature. A wide range of biotechnologies make it possible to change human nature, including experiments conducted long before the structure of DNA was discovered. This analysis is complemented by the discovery and study of the cultural and anthropological roots of the analyzed direction of biotechnology. In many ways, it is by referring to these roots that a moral assessment of experiments to create new hybrid creatures is built. Today, computer culture changes the nature of man in the conditions of digital civilization. It should be noted that virtual communication also unfolds without direct contact between individuals. They are replaced by virtual doubles, while the physical and emotional components of ordinary human contacts are reduced. This loss of immediacy of contact is compensated for by greater ease, convenience and controllability of communication, as well as the fact that the field of communication is significantly expanded.
Alternative heat supply systems of JSC “Ukrzaliznytsia” facilities
Authors: Mamalyga Volodymyr M. , Voytenko Volodymyr A. , Dudka Yevhen I. , Cherevaty Andrii O.
Published: October 2024

In the conditions of constant attempts of rocket and bomb attacks, the development of alternative options for heating systems of objects of joint-stock company (JSC) “Ukrzaliznytsia” has become extremely urgent. Moreover, at some objects equipped with gas boilers, full or partial depreciation of the equipment takes place. Therefore, it is urgent to develop promising options for heating systems. First of all, it can be not only gas, but also electric boilers. Sometimes, during the development of alternative options for investment projects, the method of “reduced costs” is used, which became widespread even in the times of the USSR. But this method does not take into account the change in the value of money during the implementation and operation of the equipment. Therefore, an approach was proposed to determine the costs of implementing heating systems of Joint-stock company (JSC) “Ukrzaliznytsia” facilities, which takes into account the fact that costs depend on the value of money. As a result, it was shown that at the current level of equipment costs and electricity tariffs and gas prices, it is more appropriate to use heating systems based on electric boilers, and the use of the “reduced costs” method to determine the feasibility of implementing heating systems is not unacceptable.
Modeling of fuel combustion processes in a steam boiler when replacing standard burners
Authors: Baraniuk Oleksandr V. , Rachуnskyі Arthur Yu. , Chernousenko Olga Yu.
Published: October 2024

To date, most of Ukraine's thermal power equipment has exhausted its factory resource and is physically and morally obsolete. One of the ways to solve this problem is to modernize it with the introduction of modern fuel-using equipment. The decisive direction in this situation is the focus on domestic technologies, which differ from imported counterparts due to better adaptability to domestic equipment, as well as a more favorable price policy for domestic manufacturers. The presented work was carried out in order to check the feasibility of replacing standard burners with burners built on the basis of jet-niche technology in power boilers, for example, such as the GМ-50 (Е-50-3,9-440GМ) steam boiler. For this, a computer model of a steam boiler and regular burners was developed. The research was carried out using the ANSYS Student software package. The application of the numerical modeling method using the ANSYS Student software complex made it possible to perform a detailed analysis of the fuel combustion process in a steam boiler, evaluate its efficiency and study the impact on environmental indicators. The object of the research was the processes that take place during the combustion of gaseous fuel and their influence on the performance indicators of the GМ-50 power boiler. The subject of the study was a CFD fuel model of the GМ-50 boiler, whose regular burners are capable of working on both liquid and gaseous fuel. Methane was used as fuel. Both regular axial burners and burners built on the basis of jet-niche technology, which are more environmentally friendly, were used as burners. Verification of the CFD model, which took place using a known analytical technique, shows that the discrepancy between the values of analytical calculations and model calculations does not exceed 6.7 %. The average temperature of flue gases in the festoon window was selected as a comparison parameter. The temperature value of 1117 С was obtained analytically. Calculation using the CFD model developed in the ANSYS-CFX environment shows that the temperature value should be 1042 С. It was determined that regular burners are less environmentally friendly than, for example, modern jet-niche ones. So, for the coefficient of excess air  = 1.2, the average value of nitrogen oxides at the fuel outlet is 187 ppm. It makes sense to replace standard burners, for example, with jet-niche ones, which are most suitable for replacing standard ones.
The method of constructing a GL-model for a consecutive k-out-of-n system
Authors: Romankevich Vitaliy A. , Yermolenko Ihor A. , Morozov Kostiantyn V. , Romankevich Alexei M.
Published: October 2024

The paper is devoted to the method of constructing GL-models of the behavior of multiprocessor systems in a failure flow, in particular, consecutive k-out-of-n systems are considered, whose main characteristic is the failure of the system when a certain number of processors connected consecutively fail. The GL-models under construction are based on the basic models with a minimum number of lost edges. It has been determined that to build a GL-model of systems of this type, it is sufficient to calculate the maximum possible number of failed processors at which the system remains operational. A GL-model of a system that can handle this number of failures is built without considering the consecutive failures. The next step is to determine all possible consecutive failures that cause the system to fail, and the model is modified to reflect the system failure when consecutive failures occur. The paper describes a method for calculating the maximum allowable number of failures at which the system remains operational. An example of building GL-models for consecutive k-out-of-n systems is given.
Internet of things and artificial intelligence in agriculture
Authors: Kunup Tetyana V.
Published: October 2024

This robot is considered to be a source of modern technologies, such as the Internet of speech and artificial intelligence, for the development of rural rule. integration into the concept of AIoT (Artificial Intelligence of Things). This includes process automation, increased production efficiency, optimization of resource resources and increased product quality. There appears to be a stagnation of the plant's production, which helps farmers make more informed decisions based on real data. The results and cost-effective benefits of implementing AIoT are analyzed, including the need for significant investments and cybersecurity. Respect is given to the government program of Ukraine, aimed at supporting innovative technologies, which will allow the country to significantly improve its position on the international market.
EFFECT OF PHYSISORBED COLLECTOR ON INDUCTION TIME AND KINETICS IN FLOTATION OF COAL SLURRIES
Authors: КОНДРАТЬЕВ С.А. , ХАМЗИНА Т.А.
Published: October 2024

Анализ литературных данных показал предпочтительность использования времени индукции, а не контактного угла в качестве критерия флотируемости угля. Исследована кинетика флотации угля в зависимости от поверхностных по отношению к границе раздела “газ - жидкость” свойств гетерополярных собирателей. На примере шламов угля марки Ж разных месторождений выполнены работы по определению корреляционной связи между скоростью растекания собирателей по поверхности воды и кинетикой флотации углей. Обосновано использование времени перемещения линии контакта сред трех агрегатных состояний по минеральной поверхности как времени индукции. На основании связи скорости растекания собирателя со временем перемещения линии смачивания (время индукции) и скоростью флотации установлено, что флотационная активность собирателя определяется его свойствами по отношению к границе раздела “газ - жидкость”.

The literature review discloses preferability of using the time of induction rather than the wetting angle as a criterion of coal floatability. The authors analyze kinetics of coal flotation as function of surface properties of heteropolar collectors relative to the gas-liquid interface. The correlation between the spreading velocity of collectors on water surface and the coal flotation kinetics is determined as a case-study of fat coal slurries. Justification is given for using the time of displacement of the boundary between three states of aggregation as the time of induction. From the correlation of the spreading velocity of a collector, displacement time of the contact line (induction time) and the flotation velocity, it is found that flotation activity of the collector is governed by its properties relative to the gas-liquid interface.
STOCHASTIC OPTIMIZATION MODEL SUPPLIES OF FLOTATION MATERIALS
Authors: СТЕПАНОВИЧ П. , ВУЙИЧ С. , ТРУМИЧ М. , ПРАШТАЛО Ж. , КУЗМАНОВИЧ М.
Published: October 2024

Рассмотрены вопросы баланса между стабильностью горного производства и минимизацией расходов запасов. Приведены основные сведения о стохастической модели запасов, целевая функция ожидаемых затрат и информация о процедуре нахождения оптимального решения. Разработанная модель применяется к нахождению оптимального количества расходных материалов, необходимых для ведения флотационных работ на руднике, где ведется добыча свинца, цинка и меди.

Consumable supplies in mines (explosives and explosive devices, oil, lubricants, rubber, protective devices, spare parts for machinery and equipment, flotation reagents, etc.) should be sufficient for stable production. However, for mining operations, supplies are burden costs, as storing supplies increases operating costs. The logical question is how to achieve the balance between mine production stability and minimization of costs of supplies, that is, how to optimize supplies. The paper presents a quantitative model of stochastic supplies optimization as a possible answer to this question. The application was demonstrated in the specific case of polymetallic ore lead, zinc, copper, and silver mine flotation with value indicators.
INVESTIGATION OF PROPERTIES OF DOMESTIC BINDERS FOR DUST SUPPRESSION AT TAILINGS STORAGE FACILITIES
Authors: КРАСАВЦЕВА Е.А. , МАКАРОВ Д.В. , СВЕТЛОВ А.В.
Published: October 2024

Представлены результаты исследований свойств связующих реагентов отечественного производства для пылеподавления хвостохранилища на примере одного из предприятий горнопромышленного комплекса Мурманской области. Определены динамика набора прочности образованных покрытий, изменение прочности в режиме “увлажнение - высыхание”, оценено влияние реагентов на водопроницаемость обработанного материала хвостов, проведено выщелачивание полимеризовавшихся концентратов в слабокислой и щелочной среде. Показана необходимость проведения комплексного исследования для обоснованного выбора связующего реагента.

The article presents the case-study of properties of domestic binders in dust suppression at tailing storage facilities at a mining and processing plant in the Murmansk Region. The strength development dynamics of the binder-formed blankets and the change in the strength in the wetting-drying mode are determined, the impact of chemical agents on water permeability of treated tailings is estimated, and leaching of polymerized concentrates in weakly acid and alkaline media is carried out. The authors emphasize essentiality of an integrated research for the well-founded choice of a binder.
A MODEL OF JOINT ROCK-PROPPANT DEFORMATION IN HYDRAULIC FRACTURING
Authors: ЖУРКИНА Д.С. , ЛАВРИКОВ С.В. , РЕВУЖЕНКО А.Ф.
Published: October 2024

Исследована связь между двумя процессами: деформированием проппантного слоя под действием горного давления и изменением горного давления в окружающем массиве при сбросе давления нагнетающей жидкости. Для моделирования задачи деформирования проппанта (задача механики сыпучих сред) используется метод дискретных элементов, для моделирования перераспределения горного давления (задача механики горных пород) применяется разработанная ранее континуальная модель горной породы как среды с внутренними источниками и стоками энергии и метод конечных элементов. В результате численного моделирования показано, что в зависимости от предварительной истории нагружения и свойств среды в породном массиве могут реализовываться как устойчивый, так и неустойчивый режим деформирования. Для устойчивого режима даны расчеты равновесного давления на контуре трещины гидроразрыва, оцененo изменение пористости проппантного слоя. В неустойчивом режиме в породном массиве наблюдаются динамические проявления горного давления.

The study focuses on the connection between two processes: deformation of proppant under the action of rock pressure and the rock pressure change after injection pressure release. The modeling of proppant deformation (mechanics of granular medium) uses the discrete element method, and the rock pressure redistribution (rock mechanics) is modeled using the earlier developed model of rock as a medium with internal energy sources and sinks, and the finite element method. The numerical modeling shows that depending on the loading history and on the rock mass properties, the mode of deformation can be both stable and unstable. For the stable mode of deformation, the pressure balance is calculated at the created fracture boundary, and the change in the proppant porosity is estimated. In the unstable mode, rock mass experiences dynamic events induced by rock pressure.
PHYSICAL AND MECHANICAL PROPERTIES OF ORE AND ROCKS AFTER FLOODING
Authors: ЕРЕМЕНКО А.А. , ДАРБИНЯН Т.П. , ШАПОШНИК Ю.Н. , УСОЛЬЦЕВА О.М. , ЦОЙ П.А.
Published: October 2024

Исследованы физико-механические свойства роговика, габбро-долерита и богатой халькопирит-пирротиновой руды Октябрьского месторождения Талнахского рудного узла, подвергшихся затоплению. Анализ петрографии, элементного и минералогического состава образцов показал, что существенных различий в их свойствах после затопления не наблюдается. Сравнение деформационно-прочностных характеристик при испытаниях горных пород и руды на одноосное сжатие и растяжение демонстрирует их уменьшение в водонасыщенном и увеличение в высушенном состоянии при комнатной температуре. Пределы прочности, модули упругости, сцепления и углы внутреннего трения имеют меньшие значения после высушивания, чем в исходном состоянии.

The authors investigate the physical and mechanical properties of hornstone, gabbro-dolerite and rich chalcopyrite-pyrrhotine ore subjected to flooding at the Oktyabrsky deposit in the Talnakh ore province. The analysis of the petrography, chemistry and mineralogy of the test samples showed no substantial differences in their properties after flooding. The comparison of the strength and deformation characteristics of rocks from the uniaxial compression and tension testing results demonstrate the decrease of both in water-saturated rocks and the increase in the room-temperature dried samples. The limit strength, elasticity modulus and internal friction angles have smaller values in rocks after drying than in the initial samples.
MODELING HYDRAULIC FRACTURING NEAR CIRCULAR UNDERGROUND OPENING IN TRIAXIAL COMPRESSION
Authors: АЗАРОВ А.В. , СЕРДЮКОВ С.В.
Published: October 2024

Представлены результаты численных исследований распространения трещины гидроразрыва в неоднородно напряженной упругой среде вблизи цилиндрической полости. Моделирование выполнено расширенным методом конечных элементов. Рассмотрены разные варианты ориентации главных напряжений по отношению к полости и дисковому инициатору разрыва. Показано влияние соотношения напряжений и их уровня на траекторию развития трещин. Приведены основные типы образующихся трещин. Проанализированы условия, при которых гидроразрыв выходит на поверхность полости, распространяется вдоль нее. Описаны особенности изменения давления распространения и раскрытия трещин различной формы в зависимости от закаченного объема рабочей жидкости.

The article describes the numerical studies on propagation of hydraulic fracture in the nonuniform-stress elastic environment around a cylindrical cavity. The modeling used the extended method of finite elements. The scope of the modeling embraced different variants of the principal stress orientation relative to the cavity and a disk-shaped initiation fracture. The influence of the stress ratio and stress level on the fracture path is described. The main types of the created fractures are shown. The conditions when the created fracture reaches the cavity surface or propagates along it are analyzed. The features of the fracture propagation and opening pressure are described for the fractures of various shapes depending on the volume of the injection fluid.
MODELING ROCK FRACTURE IN CLOSELY SPACED PERIMETER BLASTING
Authors: ШЕР Е.Н.
Published: October 2024

Приведены расчетная схема и результаты расчетов развития магистральных трещин, образующихся при взрыве сближенных шпуровых зарядов в хрупких горных породах. Расчеты в трехмерной постановке выполнены на примере образования щели в граните при контурном взрывании шпуров с зарядами аммонита для разных расстояний между шпурами и степени их заполнения взрывчатым веществом. Определены формы и размеры магистральных трещин, образующихся при взрыве одиночного шпурового заряда и трех сближенных. По результатам расчетов для конкретного шпурового заряда предложен способ определения рационального расстояния между шпурами при контурном взрывании, обеспечивающего максимальную площадь образующейся щели.

The article presents the design model and results for the main crack development in closely spaced blasting in brittle rocks. The 3D modeling is described as case-study of crack formation in granite in perimeter blasting of ammonite charges at different spacing and filling of blastholes. The shapes and sizes are determined for the main cracks generated by blasting of single charge and three close-spaced charges. From the modeling results obtained for a specific charge, the method is proposed to determine efficient spacing of blastholes in perimeter blasting to ensure the maximal area of the created crack.
INFLUENCE OF PROPPANT PARAMETERS ON HYDRAULIC FRACTURE CONDUCTIVITY
Authors: ЯН И. , ФУ Ц. , ЮАНЬ Х. , ХАЙДИНА М.П. , ВЭЙ Ц.
Published: October 2024

Исследовано влияние параметров проппантов на долговременную проводимость трещин гидроразрыва пласта. Вдавливание проппантов в стенки трещины и их раздавливание изучены системой определения проводимости трещины FCMS-V с помощью автоэмиссионного сканирующего микроскопа, поляризационного микроскопа и методом ситового анализа. Выявлены зависимости проводимости от размера гранул, гранулометрического состава, концентрации и способа размещения проппантов, давления смыкания трещины и вдавливания проппантов в стенки трещины. Подробно рассмотрены вопросы вдавливания и раздавливания проппантов различного размера гранул под разным давлением смыкания трещины. Даны рекомендации по размещению проппантов при гидроразрыве пласта в условиях добычи метана угольных пластов на участке YC бассейна Ordos (Китай).

The authors analyze the influence of proppant parameter on the long-term conductivity of hydraulic fractures. Pressing of proppants in fracture walls and proppant smashing was studied using FCMS-V fracture conductivity system, field emission scanning electron microscope, polarization microscope and the sieve method. The correlations between the conductivity, grain size, grain-size composition, proppant concentration and placement technique, closure pressure of fractures and pressure of proppant pressing-in in the fracture walls are revealed. Pressing and smashing of proppant grains of different size under different closure pressure of fractures is discussed. The recommendations on proppant placement during hydraulic fracturing are given as a case study of methane recovery from coal seams in YC site of Ordos Basin in China.
STUDY ON BENEFICIATION TECHNOLOGY FOR RATIONAL UTILIZATION OF LOW-GRADE COPPER NICKEL SYMBIOTIC ORE
Authors: ГАНЬ Ф. , ГАО Л. , ДАЙ Х. , РАО Б. , БАЙ Ц.
Published: October 2024

Рассмотрена методика рационального использования запасов бедных руд с низким содержанием меди и никеля. В результате минералогического анализа руды выявлено, что наиболее ценными элементами, входящими в состав руды, являются Cu и Ni, весовое содержание которых составляет 0.16 и 0.39 % соответственно. Основным медьсодержащим минералом является халькопирит, а основным никельсодержащим минералом - пентландит, в малом количестве распределенный в рудном сырье. Исходя из свойств руды, предложена следующая технология обогащения: одностадийное измельчение → основная коллективная медно-никелевая флотация → сепарация меди и никеля. В результате сепарации получен медный концентрат с массовым содержанием меди 17.08 % и никелевый концентрат с массовым содержанием никеля 4.63 %. Настоящая работа предлагает низкозатратное техническое решение для рационального использования полиметаллических парагенетических минеральных запасов.

In order to realize the rational utilization of low-grade polymetallic symbiotic mineral resources with low input, typical copper-nickel symbiotic low-grade ores were used as the test object. After careful process mineralogy research on the ore, it was learned that the main valuable elements of the ore were Cu and Ni, and the content of these two elements was 0.16 wt.% and 0.39 wt.%, respectively. The main copper-bearing mineral in the ore was chalcopyrite, and the main nickel-bearing mineral was pentlandite. Useful minerals were finely distributed in ores. Based on the properties of ore, a beneficiation process of one stage grinding → copper/nickel mixed flotation → copper/nickel separation was proposed. A copper concentrate with a Cu grade of 17.08 wt.% and a nickel concentrate with a Ni grade of 4.63 wt.% were obtained by separation. This study provides a low-investment technical solution for the rational utilization of polymetallic paragenetic mineral resources.
BIO-SYSTEM CONCEPT OF TECHNOLOGICAL INNOVATION IN MINING WITH IMPLEMENTATION OF ECOLOGICAL IMPERATIVE
Authors: ГАЛЧЕНКО Ю.П. , КАЛАБИН Г.В.
Published: October 2024

Представлены результаты исследований по обоснованию перспектив экологизации технологической парадигмы развития минерально-сырьевого комплекса с учетом ограничений и требований на основе равных возможностей для развития техносферы и биосферы. Структурировано понятие природоподобных технологий в зависимости от совпадения предназначения содержательных компонентов биологических и горнотехнических систем. Дана методология гомеостатической трансформации принципов функционирования биологических систем в структуру технологического кластера конвергентных горных технологий.

The prospects for ecologization of technological paradigm of development in the sector of mineral resources are studied and substantiated with regard to the requirements and constraints, and based on the equal possibilities for the biosphere and technosphere. The notion of the nature-like technologies is structured subject to the coincidence of missions of the content-rich components in the natural and geotechnical systems. The methodology of the homeostatic transformation of the biological system functions into the structure of a cluster on the convergent mining technologies is presented.
ФИЗИКО-ХИМИЧЕСКИЕ ИССЛЕДОВАНИЯ ГУМИНОВЫХ, ГИМАТОМЕЛАНОВЫХ И ФУЛЬВОКИСЛОТ БУРЫХ УГЛЕЙ
Authors: ВОТОЛИН К.С. , ЖЕРЕБЦОВ С.И. , ШПАКОДРАЕВ К.М. , МАЛЫШЕНКО Н.В. , ИСМАГИЛОВ З.Р.
Published: October 2024

Разработана и апробирована на бурых углях Канско-Ачинского и Южно-Уральского бассейнов методика получения гуминовых (ГК), гиматомелановых (ГмК) и фульвокислот (ФК), которая позволяет достичь их высокого выхода. Наибольший выход гуминовых веществ достигнут для естественно окисленного бурого угля Тисульского месторождения: ГК - 60.9 %, ГмК - 11.3 %, ФК - 9.6 %. Изучен состав нативных бурых углей и полученных из них ГК, ГмК и ФК с использованием методов технического и элементного анализа, ИК-Фурье и 13С ЯМР (CPMAS) спектроскопии. Установлено, что химический и структурно-групповой состав ГК, ГмК и ФК имеет значимые различия. Образцы ГмК и ФК характеризуются относительно высоким содержанием кислородсодержащих алифатических групп с преобладанием карбоновых кислот и сложных эфиров по сравнению с ГК. Для ГК характерно более высокое содержание углерода, водорода и ароматических фрагментов. Образцы ГмК и ФК имеют схожий элементный и структурно-групповой состав, однако у ГмК выше содержание углерода и ароматических фрагментов.

The procedure for obtaining humic (HA), hymatomelanic (HmA) and fulvic acids (FA) that allows achieving their high yield has been developed and tested with the brown coals of the Kansk-Achinsk and the South Ural basins. The highest yield of humic substances is achieved for naturally oxidized brown coal of the Tisul deposit: HA - 60.9 %, HmA - 11.3 %, FA - 9.6 %. The composition of native brown coals, as well as HA, HmA and FA obtained from them, was studied using proximate and ultimate analysis, FTIR spectroscopy and 13C NMR (CPMAS) spectroscopy. It is established that the chemical and structural-group composition of HA, HmA and FA has significant differences. The samples of HmA and FA are characterized by relatively high content of oxygen-containing aliphatic groups with the predominance of carboxylic acids and esters in comparison with HA. Higher content of carbon, hydrogen and aromatic fragments is characteristic of HA. The samples of HmA and FA have similar elemental and structural group composition, however, HmA has a higher content of carbon and aromatic fragments.
ФИЗИКО-ХИМИЧЕСКИЕ И БИОСПЕЦИФИЧЕСКИЕ СВОЙСТВА ПОРИСТОГО УГЛЕРОДНОГО СОРБЕНТА, МОДИФИЦИРОВАННОГО СУЛЬФОСАЛИЦИЛОВОЙ КИСЛОТОЙ
Authors: СЕДАНОВА А.В. , ПЬЯНОВА Л.Г. , ДЕЛЯГИНА М.С. , КОРНИЕНКО Н.В. , ЛЕОНТЬЕВА Н.Н.
Published: October 2024

Синтезирован мезопористый углеродный сорбент, модифицированный сульфосалициловой кислотой методом адсорбции из водных растворов. Подобраны оптимальные параметры модифицирования: соотношение, концентрация, продолжительность стадий пропитки и термообработки, рН. Изучены физико-химические свойства образцов: удельная поверхность, объем пор, качественный и количественный состав поверхностных функциональных групп, количество нанесенного модификатора, адсорбционные и десорбционные свойства. Определены адсорбционные характеристики исследуемых образцов в отношении органических красителей метиленового синего и метанилового желтого. Установлено, что в процессе десорбции в течение 48 ч в водный раствор, моделирующий среду кишечника, и в этанол переходит соответственно ~68 и ~82 % от исходной концентрации наносимой на данный образец сульфосалициловой кислоты. При этом наблюдается снижение рН исходных растворов на 6 единиц. Установлены высокие антибактериальные свойства модифицированного углеродного сорбента по отношению к Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae in vitro.

A mesoporous carbon sorbent modified with sulphosalicylic acid by adsorption from aqueous solutions has been synthesized. The optimal modification parameters were selected: the ratio, concentration, the duration of impregnation and heat treatment stages, and pH. The physicochemical properties of the samples have been studied: textural characteristics, qualitative and quantitative composition of surface functional groups, the amount of applied modifier, adsorption and desorption properties. The adsorption characteristics of the studied samples with respect to organic dyes methylene blue and methanyl yellow are determined. It has been established that during desorption for 48 h, ~68 and ~82% of the initial concentration of sulphosalicylic acid applied to the sample pass into the aqueous solution, modelling the intestinal medium and into ethanol, respectively. In this case, a decrease in the pH of the initial solutions by 6 units is observed. High antibacterial properties of the modified carbon sorbent towards Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae have been established in vitro .
ВЫЯВЛЕНИЕ ПОТЕНЦИАЛЬНЫХ ПРОИЗВОДСТВЕННЫХ ЦЕПОЧЕК ПЕРЕРАБОТКИ УГЛЯ НА ОСНОВЕ ПАТЕНТНОЙ АНАЛИТИКИ
Authors: КОРОЛЕВ М.К. , НИКИТЕНКО С.М. , ГООСЕН Е.В.
Published: October 2024

Представлен алгоритм выявления потенциальных производственных цепочек для регионов ресурсного типа на основе патентной аналитики, а именно с применением подходов патентного ландшафта и экспертной оценки, которые в дальнейшем, после проведения их экономического обоснования, могут стать основой для формирования новой стратегии инновационного развития региона ресурсного типа. В рамках данной стратегии предполагается создание новых высокотехнологичных секторов экономики в области угледобычи и углепереработки.

An algorithm is presented for identifying potential production chains for resource-based regions relying on patent analytics, in particular, applying patent landscape report creation approaches and peer review, which in the future, after their economic justification, can become the foundation for the new strategy of innovative development for a resource-based region. Within this strategy, it is planned to create new high-tech economy sectors in the field of coal mining and coal processing.
Readings of patriarch of Ruthenian istoriography
Authors: Kirkienė Genė
Published: October 2024

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Patient’s Quality of Life After 3-and 6-Months Cataract Surgery
Authors: Juanarta Pieter , Karfiati Feti , Budiman Budiman
Published: October 2024

Cataract surgery is the most common elective procedure and has been shown to increase patients' visual acuity. However, visual acuity alone cannot adequately represent their quality of life. Quality of life can be measured with a standardized questionnaire, such as the National Eye Institute Refractive Error Quality of Life Instrument. Patients with better quality of life pre-operatively will benefit less from cataract surgery. This study aimed to describe patients' quality of life after long-term cataract surgery in the National Eye Center Cicendo Eye Hospital. This cross-sectional descriptive study used primary data collected using a questionnaire  from March to May 2022. The subjects were 33 people with cataracts who underwent uncomplicated cataract surgery at Cicendo National Eye Hospital over the past three and six months of the study. Patients who met the inclusion criteria were given the NEI-RQL 42 questionnaire. In visual clarity, patient expectations, near vision, far vision, daily fluctuations, activity limitations, suboptimal correction, and satisfaction with correction variables, an increase in value at three months was observed, yet slightly decreased at 6 months. There was decreased glare complaints, symptoms, and dependence on correction at preoperative, 3 months, and 6 months. An increase in the level of concern and appearance from preoperative, 3 months, and 6 months post-operative was observed. Thus, an improvement in the patient's quality of life is observed three months after surgery, yet decreases slightly in six months after surgery.
Comparison of Different Cycloplegic Refraction Regimens for Children
Authors: Irfani Irawati , Gunawan Fany , Satari Karmelita , Sari Maya , Oktarima Primawita , Caesarya Sesy , Karfiati Feti
Published: October 2024

In the process of a pediatric eye exam, cycloplegic refraction is a crucial step. Since no single cycloplegic drug is ideal, a combination regimen is employed. This study compares the ocular (refractive power and pupil diameter) and systemic (blood pressure and heart rate) effects of administering a combination of 1% cyclopentolate and 2.5% phenylephrine, with or without 1% tropicamide, to children with refractive errors. This study aimed to discover a more feasible regimen for children. This was a single-blind study, a randomized clinical trial conducted from November–December 2020 in children with mild to moderate refractive errors. Group A received 1% cyclopentolate, 2.5% phenylephrine, and 1% tropicamide (SFT), whereas group B received 1% cyclopentolate and 2.5% phenylephrine (SF). The outcomes were measured using an auto refractometer and IOL Master® 700. Before and 60 minutes after medication was administered, blood pressure and heart rate were measured. There were 54 participants (108 eyes) with an average age of 12.85± 2.84 years. Although the SFT group's refractive power and pupil width were greater than those of the SF group, the differences were not statistically significant (p=0.271 and p=0.088). Heart rate (p=0.521) and blood pressure (systolic p=0.201; diastolic p=0.950) did not significantly differ between the two groups. Despite mydriasis manifested more rapidly in the SFT group, there was no discernible difference in the cycloplegic effects between those groups. SF might be a more feasible regimen for cycloplegic refraction in children with refractive errors.
Prostate Specific Antigen Level and Gleason Score in Indonesian Prostate Cancer Patients
Authors: Herawan Muhammad Imam Al Kautsar , Adriansjah Ricky
Published: October 2024

In Indonesia, the number of prostate cancer continues to increase and even becomes the most common malignancy in men in 2015. Delayed early detection of prostate cancer is a significant concern. Prostate-specific antigen (PSA) level is found to be elevated in various conditions of prostate tissue damage, including prostate cancer. The extent of tissue damage in prostate cancer, represented by the Gleason score, is suspected to be related to the increase in the PSA level in the bloodstream. To investigate the relationship between the PSA level and Gleason scores in prostate cancer patients, a cross-sectional observational study was conducted. The study population consisted of 83 prostate cancer patients treated in Dr. Hasan Sadikin General Hospital Bandung, Indonesia, from 2017 to 2021. Data collected were analyzed using Spearman correlation test was used with an alpha value of 5%. Results indicated that 37.3% patients had a PSA level above 200 ng/dL, and 25.3% had a PSA level between 10-50 ng/dL. The majority of patients (48.1%) had a Gleason score of 9-10 (ISUP 5), while 24.1% had a score of 8 (ISUP 4). Bivariate analysis showed no significant relationship between the PSA level and Gleason score (p-value=0.445). Further studies are needed to determine the sensitivity and specificity of PSA in diagnosing prostate cancer.
Effect of Saline Nasal Irrigation in Patients with Sinonasal Symptoms
Authors: Widuri Asti , Fakhriani Rizka , Daniswara Deoni
Published: October 2024

Nasal irrigation with saline is frequently used as an alternative therapy for sinonasal diseases since it effectively reduces sinonasal symptoms and improves the quality of life when measured by various subjective instruments. The mechanisms of action of saline irrigation remain unclear, but some hypotheses attribute the direct physical cleansing of thick mucus, allergens, and pollutants. This study aimed to determine the effect of nasal saline irrigation on the nasal mucosa using the modified Lund-Kennedy endoscopic score as the objective evaluation. This pre-post-experimental study was conducted at PKU Muhammadiyah Gamping Hospital Yogyakarta, Indonesia, from May to June 2023. The study included 18 individuals presenting with sinonasal symptoms. Participants meeting the inclusion and exclusion criteria who provided informed consent were trained in nasal saline irrigation. Patients were assessed at baseline and one week after nasal saline irrigation using endoscopy, TNSS, and MCC time. Results revealed that the mean of endoscopic scores before and after saline irrigation were 6.89±1.1 and 5.33±1.4, respectively (p-value 0.006),  while the mean of TNSS scores before and after saline irrigation was 6.17±2.3 and 4.28±2.6, respectively (p-value 0.006). Thus, nasal saline irrigation significantly improves the endoscopy and TNSS scores, but not the MCC time.