bluuebunny/crossref_metadata_2025 huggingface dataset:
Geochemical Surveys of Ground and Surface Waters in the Abandoned Hg-Mine of Abbadia San Salvatore (Central Italy): A Preparatory Investigation before Remediation
Authors: Meloni Federica , Montegrossi Giordano , Cabassi Jacopo , Bianchi Francesco , Nisi Barbara , Rappuoli Daniele , Vaselli Orlando
Published: April 2024

Since 2013, 34 surveys of surface and ground waters within and outside the former Hg-mine of Abbadia San Salvatore (Italy), which is currently under remediation, were performed for determining Hg, As, Sb, and main and minor solutes. The water quality is rather poor since most waters show relatively high Hg concentrations (up to 695 µg/L). Differently, As and Sb only overcome the Italian law thresholds in a few sites. A high geochemical variability was observed for most groundwaters without any clear relationship between wet and dry periods. The main source of chalcophile elements is likely related to: (i) the interaction between meteoric waters and soils contaminated by the previous production of mercury; or (ii) the interaction between meteoric waters and the anthropic filling material of a former paleo-valley near the furnaces edifices. While the remediation is expected to be concluded in 2025, the aquifer contamination still remains a problem. Our investigation, including geochemical/hydrogeological modeling, is prodromal to future activities aimed at reducing the Hg content. Currently, the construction of a hydraulic barrier is apparently the most suitable solution to minimize the interaction processes between water–rock and man-made material, which are responsible for the 10-year concentration variability.
Recent Issues and Challenges in the Study of Inland Waters
Authors: Staniszewski Ryszard , Messyasz Beata , Dąbrowski Piotr , Burdziakowski Pawel , Spychała Marcin
Published: April 2024

This paper addresses several important problems and methods related to studies of inland waters based on the existing scientific literature. The use of UAVs in freshwater monitoring is described, including recent contact and non-contact solutions. Due to a decline in biological diversity in many parts of the globe, the main threats are described together with a modern method for algae and cyanobacteria monitoring utilizing chlorophyll a fluorescence. Observed disturbances in the functioning of river biocenoses related to mine waters’ discharge, causing changes in the physico-chemical parameters of waters and sediments, give rise to the need to develop more accurate methods for the assessment of this phenomenon. Important problems occurring in the context of microplastic detection, including the lack of unification, standardization and repeatability of the methods used, were described. In conclusion, accurate results in the monitoring of water quality parameters of inland waters can be achieved by combining modern methods and using non-contact solutions.
Impacts of Extreme Climate on the Water Resource System in Sichuan Province
Authors: Ma Fang , Li Zhijun
Published: April 2024

Based on the data of Sichuan Province from 2007 to 2021, the extreme climate events in Sichuan Province was identified by statistical method, and the coupling coordination degree of water resources-climate system and separate water resource system was analyzed. Based on the difference of coupling coordination degree under these two systems, the influence mechanism of extreme climate factors on the water resource system is analyzed. The results show that the extreme climate types in Sichuan Province gradually transition from extreme drought to extreme precipitation and from extreme low temperature to extreme high temperature. When climate factors are not considered, the coupling coordination degree of the water resource system is generally improved and the distribution is more concentrated. Moreover, the influence of climate factors on the water resource system is not a simple linear relationship.
Association of polydoctoring and mortality among persons over 85 years with multimorbidity: a prospective cohort study in Japan
Authors: Ando Takayuki , Sasaki Takashi , Abe Yukiko , Nishimoto Yoshinori , Hirata Takumi , Tajima Takayuki , Oguma Yuko , Haruta Junji , Arai Yasumichi
Published: April 2024

Background

Polydoctoring can increase the risk of care fragmentation among patients with multimorbidity, but its impact on health outcomes remains unclear.

Aim

To determine the effects of polydoctoring, as measured by the regularly visited facilities (RVF) indicator, on patient outcomes among older individuals with multimorbidity.

Design & setting

Data from the ongoing prospective cohort study, Kawasaki Aging and Wellbeing Project (KAWP), was utilised in this study. Among the 1026 KAWP participants aged 85–89 years, those with two or more chronic conditions were enrolled in this study.

Method

Care fragmentation and polydoctoring was evaluated using the RVF, which is a new indicator that measures the number of medical facilities consistently involved in a patient’s care. Based on RVF, mortality was analysed using the Cox proportional hazards model, with adjustments for age, sex, frailty, and number of comorbidities.

Results

A significant reduction in mortality rates was observed in participants with an RVF of ≥3 and 2–4 comorbidities (hazard ratio [HR] 0.43, 95% confidence interval [CI] = 0.18 to 0.99,
P
value = 0.048). However, no significant difference in mortality based on RVF was observed for those with ≥5 comorbidities. Notably, individuals with ≥5 comorbidities and an RVF of 0 had a significantly higher HR for death (HR 2.68, 95% CI = 1.05 to 6.84,
P
value = 0.039).

Conclusion

In older patients with multimorbidity, polydoctoring may reduce mortality in patients with ≤4 coexisting conditions, but it does not significantly impact mortality in those with ≥5 conditions. These findings provide insights for healthcare decision making in managing older patients with multimorbidity.
Association of Changes in Vector Length with Changes in Left Ventricular Mass among Patients on Maintenance Hemodialysis
Authors: Elsayed Enass , Farag Youssef M.K. , Ravi Katherine Scovner , Chertow Glenn M. , Mc Causland Finnian R.
Published: April 2024

Key Points

Bioimpedance has been proposed as an objective method to assess volume status among patients receiving maintenance hemodialysis.

The Frequent Hemodialysis Network Daily Trial measured bioimpedance parameters of volume status (vector length) and cardiac magnetic resonance imaging at baseline and 12 months.

We observed that changes in vector length were inversely associated with changes in left ventricular mass and volume over a 12-month period.

Background

Hypervolemia is thought to be a major contributor to higher left ventricular mass (LVM), a potent predictor for cardiovascular mortality among patients on maintenance hemodialysis. We hypothesized that a decrease in vector length (a bioimpedance proxy of hypervolemia) would be associated with an increase in LVM.

Methods

Using data from the Frequent Hemodialysis Network Daily Trial (n=160), we used linear regression to assess the association of changes in vector length from baseline to month 12 with changes in magnetic resonance imaging measures of LVM and other cardiac parameters. We adjusted models for the randomized group, baseline vector length, age, sex, race, body mass index, vascular access, dialysis vintage, history of hypertension, heart failure, and diabetes, residual kidney function, predialysis systolic BP, ultrafiltration rate, serum-dialysate sodium gradient, hemoglobin, phosphate, angiotensin-converting enzyme inhibitor or angiotensin receptor blocker use, erythropoietin dose, and equilibrated Kt/V.

Results

The mean age of the patients was 50±13 years; 35% were female. In the fully adjusted models, a decline in vector length (per 50 Ω/m; i.e., increase in volume) was associated with a 6.8 g (95% confidence interval [CI], −0.1 to 13.7) and 2.6 g/m2 (95% CI, −1.2 to 6.3) increase in LVM and LVM index, respectively, and an increase of 15.0 ml (95% CI, 7.5 to 22.4), 7.3 ml (95% CI, 3.0 to 12.7), 7.8 ml (95% CI, 3.0 to 12.7), and −0.9% (95% CI, −3.1 to 1.3) in left ventricular end-diastolic volume, left ventricular end-systolic volume, left ventricular stroke volume, and left ventricular ejection fraction, respectively. The lowest tertile of change in vector length (i.e., greater increase in volume) was associated with greater increases in left ventricular end-diastolic volume and left ventricular stroke volume, versus the highest tertile. There was no evidence of heterogeneity by randomized group.

Conclusions

Change in vector length, a bioimpedance-derived proxy of volume status, was inversely associated with indices of LVM and volume measured by cardiac magnetic resonance imaging in patients randomized to conventional or frequent hemodialysis over 12 months.
Transtorno Dissociativo de Identidade em um paciente com 12 personalidades: um relato de caso
Authors: Cardoso Bruno Barreira , Cunha Eduardo Mendes Ferreira da , Ikemoto Roberto Akira , Duarte Julia , Bernardes Patrícia Soares , Moreira Marco Aurélio Muniz
Published: April 2024

O mecanismo traumático está relacionado concretamente com os transtornos dissociativos de um modo geral. Dentre esses, importância ímpar deve ser atribuída ao transtorno dissociativo de identidade, cujo trauma na infância é fortemente citado como fator causal associado. Apesar de possuir guidelines específicos para auxiliar na sua avaliação, investigação e tratamento, ainda é bastante subdiagnosticado, sendo muitas vezes tardiamente abordado por especialistas. Esse artigo descreve o caso de um paciente de 15 anos diagnosticado com esse transtorno e comenta sobre critérios diagnósticos, epidemiológicos e o manejo desse tipo de transtorno dissociativo.
Avaliação farmacotécnica da estabilidade de preparações orais líquidas de Omeprazol: uma revisão integrativa
Authors: Oliveira Simone Maria Menegatti de
Published: April 2024

O omeprazol é um dos fármacos mais utilizados no tratamento de determinados distúrbios estomacais, porém, por ser instável a longo prazo, não está disponível comercialmente na forma de preparação oral líquida. A preparação extemporânea é a alternativa viável. O objetivo deste trabalho foi realizar uma revisão integrativa sobre a estabilidade do omeprazol em preparações orais líquidas. Trata-se de uma revisão integrativa bibliográfica. Foi realizado um levantamento bibliográfico na base de dados ScienceDirect e no buscador Google Acadêmico, em qualquer idioma. Para a coleta de dados foram utilizados os seguintes descritores específicos: “Omeprazole”, “Drug Stability” e “Oral Liquid”. Os artigos selecionados necessariamente deveriam conter os dados relativos à estabilidade do omeprazol manipulado em formas farmacêuticas orais líquidas como critério de inclusão. Os critérios de exclusão foram: artigos repetidos, aqueles escritos em caracteres não romanos e aqueles onde não foi realizado o doseamento do omeprazol, no estudo de estabilidade. A pesquisa foi realizada através das palavras chaves, sendo 20 artigos incluídos. Pelos estudos da literatura pode-se concluir que as suspensões líquidas orais pediátricas de omeprazol podem ser armazenadas refrigeradas por no máximo 150 dias, dependendo da formulação e do tipo de omeprazol utilizado. O ativo em pellets produz suspensões mais estáveis do que o ativo em pó.  O pH deve ser básico, e a presença de agentes suspensores melhora as propriedades físicas da suspensão de omeprazol, garantindo homogeneidade e precisão na dosagem.
Educação em saúde em universidades como forma de prevenção de infecções sexualmente transmissíveis na juventude
Authors: Lobato Werllison Mateus Silva , Morais Elisandra Damasceno Pereira , Rego Ana Paula de Nazaré Soares , Souza Thayse do Socorro Pereira de , Sampaio Aline de Oliveira , Macedo Helena Beatriz Marques , Silva Thayane Caroline Freitas da , Conceição Roseli Assis da
Published: April 2024

A educação sexual nas escolas para jovens é extremamente importante, pois é nessa fase da vida que muitas vezes são estabelecidos hábitos e comportamentos que podem afetar a saúde em longo prazo. Algumas das principais temáticas que podem ser abordadas na educação em saúde incluem a prevenção de doenças sexualmente transmissíveis, que objetiva principalmente informar sobre as práticas sexuais seguras, métodos contraceptivos, prevenção do HIV/AIDS e outras doenças sexualmente transmissíveis. Diante disso, o referente trabalho objetiva descrever a importância da educação em saúde nas universidades para jovens como forma de prevenção de infecções sexualmente transmissíveis. Trata-se de uma revisão integrativa da literatura, com carácter de estudo descritivo e abordagem qualitativa, em que foi realizada buscas no sistema da Biblioteca Virtual em Saúde do Ministério da Saúde, usando os seguintes descritores: Educação em Saúde; Infecções Sexualmente Transmissíveis e Saúde do Adolescente. A amostra finas foi composta por 9 artigos que melhor abordaram a temática. Mediante as análises realizadas, verificou-se que a prevenção de infecções sexuais é importante porque essas doenças podem ter graves consequências para a saúde, especialmente para os adolescentes. Ademais, é importante que a escola, os professores e os profissionais de saúde trabalhem em conjunto para ajudar a garantir que os alunos tenham acesso à informação correta e aos recursos necessários para cuidar da sua saúde sexual. É fundamental que a educação entre pares seja estimulada e valorizada como uma ferramenta importante na formação dos jovens, contribuindo para a construção de uma sociedade mais justa e equilibrada livre de infecções sexuais evitáveis.
Human chorionic gonadotropin a tool in the transfer of frozen embryos in double-purpose cows used as recipients
Authors: Palacios Netzi Naidí Méndez , Palacios Néstor Méndez , Flores Felicitas Vázquez , Domínguez José Alfredo Galicia , Mendoza Maximino Méndez
Published: April 2024

The aim of this study was to evaluate the use of human chorionic gonadotropin at the time applied is performed embryo transfer (day 7) on pregnancy rate in embryo recipient cows in dual purpose cattle, as recipients are used F1 cows (Holstein x Zebu and Zebu x Creole), totaling 300 cows cycling, regardless of the number of births. To synchronize, we used an ear implant containing 3 mg of progestogen norgestomet for 9 days, plus an intramuscular injection (IM) of 3 mg of norgestomet and 5 mg estradiol valerate. At implant removal, was applied 400 IU of equine chorionic gonadotropin (eCG) in both groups. The cows that showed oestrus, were transferred on day 7 of having submitted, only the cows were transferred to a rectal palpation had a corpus luteum of quality 2 and 3, using frozen embryos. The study was divided into two groups: group 1 (control with 70 cows) and group 2, treated with 1500 IU of eCG with 72 cows. Pregnancy diagnosis was performed at 60 days, the embryo transfer. The results were evaluated with a randomized design and statistical analysis, we used a Student t-test to determine the difference between the two groups. The results of this study show a significant difference (P <0.05) in pregnancy rates, demonstrating that treatment with eCG at the embryo transfer increases pregnancy rates in cows transferred. Concluding that eCG treatment (1500 IU) resulted in higher pregnancy rate for the group treated 37 pregnant cows (51.3%) vs. the control group 29 cows pregnant (41.4%) (P <0.05).
Visual Communication of Festive Shop Window Displays with Customers
Authors: Kollárová Daniela , Habiňáková Eva , Tománková Andrea , Kushnarevych Andrii
Published: April 2024

The object of the authors’ research was the festive Christmas window displays of brick-and-mortar retail stores. The main objective of the research was to identify the dominant colours, symbols and signage of Christmas festive displays of retail brick-and-mortar stores across different product categories and countries around the world. A total of 229 retail Christmas window displays, from 14 countries around the world, across 11 assortment categories, ready for the Christmas season in 2020, 2021 and 2022, were examined. The theme of Christmas resonates in retail store windows from the beginning of November until 24 December. After this date, the issue of sales dominates the window displays. The main method of the research was the content analysis used to analyse the documents in order to determine the frequency of occurrence of the pre-given categories. Given that our interpretation of Christmas is based on its Christian foundation, it is not surprising that the main universal colours and symbols of interpretation identified are rooted in Christianity, while other, complementary ones (e.g. Santa Claus with a reindeer sleigh, a snowy landscape, or a gingerbread house) and the signage are the result of changes in popular culture over time.
EXPERIMENTAL STUDIES OF ELECTRIC CONDUCTIVITY DISTRIBUTION ALONG THE HEIGHT OF THE FLUIDIZED BED
Authors: Semen Hubynskyi , Artem Sibir , Serhii Fedorov , Andryi Ryzhkov
Published: April 2024

This work is focused on the experimental research into the electrical conductivity of a fluidized bed with graphite particles. The aim of the study is to determine the change in electrical conductivity along the height of the fluidized bed. The study was carried out on a chamber-type unit with a working space diameter 110 mm at a fluidization index 2-3. As a result of the experimental research, during heating in electrothermal fluidized bed, the uneven distribution of electrical resistance along the bed height was confirmed for the first time. The resistivity value increases 3-5 times with the depth of immersion into the bed from its surface. The unevenness of the resistivity along the height of the bed decreases with increasing temperature. The difference in power distribution due to uneven electrical resistance along the bed height can lead to a temperature difference of several tens of degrees.
CHAMBER FURNACE FOR SIMULATION OF CARBON MATERIALS HEAT TREATMENT IN ELECTROTHERMAL FLUIDIZED BED
Authors: Semen Hubynskyi , Artem Sibyr , Serhii Fedorov , Oleksiy Foris
Published: April 2024

Existing laboratory furnaces for high-temperature heat treatment of materials at around 3000°C, which have graphite heaters, allow samples to be heated at a rate two orders of magnitude lower than in electrothermal fluidized bed furnaces. This makes it impossible to use them in the research into the heat treatment of carbon materials because they do not meet the conditions of shock heating and do not allow to keep accurate residence time. The paper presents the research into the use of low-density composite carbon materials as heaters. Based on the results obtained, a high-temperature chamber furnace was designed, studied, and the temperature field in the heater was simulated. As a result, a high-temperature laboratory furnace was created with a sample heating rate of 20 °C/s - 100 °C/s, which made it possible to use it to simulate the heating process in the electrothermal fluidized bed furnace. Comparison of energy consumption in the furnace with a traditional graphite heater and a low-density carbon composite heater showed that heat loss in the furnace is reduced by 1.7 to 1.8 times.
RESEARCH OF THE QUALITY OF CAST ROLLED ROLLS
Authors: L. Ivanova , E. Kolotylo , O. Bilyi , E. Khrinik
Published: April 2024

A study of the influence of the frequency of the inductor of induction furnaces on the structure and hardness of rolled cast iron was carried out. The research was carried out using SPHN and SSHHN cast iron. As a result of the conducted research, it is shown that when using induction furnaces with different frequency of the inductor, the properties and structure of their working layer differ. The hardness of cast rolls from higher frequency furnaces is found to be lower than from furnaces with a lower frequency of the inductor. Therefore, such conditions affecting the hardness of the rolls as chemical composition and cooling mode remain constant.
PECULIARITIES OF FORMATION OF THE HEAT RESERVE ZONE WHEN USING ORE AND COAL PELLETS
Authors: Anton Vanyukov , Lidiya Kamkina , Valerii Ivashchenko , Yana Miyanovska , P. Sazonov
Published: April 2024

The object of research is the technology of iron smelting when using ore-coal compositions. The purpose of the work is the effect of changing the composition of the blast furnace charge on the thermal state of the formation of the thermal reserve zone. Research methods - theoretical studies are based on the basic principles of physical chemistry and the theory of metallurgical processes. Experimental studies were carried out in laboratory and industrial conditions. Scientific novelty - there is a "coupling phenomenon" between recovery and gasification - this is a close contact between small particles of iron oxides and carbon, which is formed in the ore-coal composite, which ensures an increase in the efficiency of blast furnace smelting. Reduction of fuel consumption and, accordingly, the amount of gases per unit charge of modern blast furnace smelting, the height of the reserve zone is reduced; this zone is not observed in the vertical elements of the furnace with the maximum ore load. Practical significance - the use of ore-coal composites provides a high speed of iron recovery and carbon gasification reactions and a low initial temperature of carbon gasification of 250-420ºС, which is ensured by gas recirculation in the under burden, due to the short distance between the parts of iron-containing and carbon composites and their sizes, where the distance between them is short and the limit of the reaction is "visible" to both.
EXPERIMENTAL STUDY OF ROLLING ACCURACY ON STAND 800
Authors: Zinchenko Mykhailo , Potap Oleh , Burchak Andrii
Published: April 2024

The purpose of the work is an experimental study of the process of square sections rolling on the rolling mill 800 to determine the influence of rolling parameters on the dimensions and length of the roll. During the study, variations in ingot mass, rolling dimensions, and rolling length were determined, regression equations and correlation coefficients were obtained for the dependence of rolling dimensions and length on the ingot mass, changes in interroll gap and time delay before the finishing stand. It was established that the ingot mass variates within significant limits - 638 kg, which is caused by the melt mass variations. Variations in the mass of the ingot within one ingot mold stool are caused by the dimensions of the ingot molds and are within 154 kg. Variations in the dimensions of the roll are carried out within the following limits: thickness - 1.0 mm, width - 0.5 mm, length - 5.3 m. The change of the interroll gap can be used to correct the length of the finished roll in a small range of lengths, if the mass variations occur within accuracy of ingot casting on one ingot mold stool. It is necessary to take additional measures to stabilize the weight of the ingot. The influence of delays in the rolling train, which occur during rolling and lead to instability of the rolling temperature regime, for this type of profiles does not significantly affect the dimensions of the cross section and the length of the roll.
THE CONCEPT OF “COGNITIVE COMPUTABILITY”
Authors: Yurii Prokopchuk
Published: April 2024

The paper discusses an outline of the concept of "cognitive computability". Distinction tasks are considered as an example. The concept is based on the paradigm of limiting generalizations. The deep unconscious, subjective inflation, the continuum of distinguishing tasks, and the space of heuristics play an important role. Deep diversification allows us to find ethical computing algorithms. The results of the study can be used to create cognitive agents and robots, as well as the cognitive Internet.
UNCTIONAL CAPABILITIES OF TIME SERIES DATABASE MANAGEMENT SYSTEMS
Authors: Vietluzhskykh Michael , Shynkarenko Viktor
Published: April 2024

This work provides a comprehensive overview of the capabilities of time series databases, with a special emphasis on InfluxDB –a leading time series database known for its efficiency and support for complex analyses through the Flux query language, including data aggregation, filtering, trend detection, and forecasting. The practical application of InfluxDB is demonstrated through various examples, showcasing its versatility in performing complex data operations, such as data filtering, identifying significant changes in data, and conducting stochastic analysis. These functionalities highlight the potential of InfluxDB across a broad range of applications, from IoT telemetry to financial analysis, underscoring the critical role of time series databases in modern data management and analysis strategies.
MATHEMATICAL MODEL OF THE INFLUENCE OF ELONGATED GRAINS ROTATION ON THE HIGH-TEMPERATURE DEFORMATION PROCESS OF SILICON NITRIDE BASED CERAMICS
Authors: I. Hnylytsia
Published: April 2024

The speed of direct high-temperature extrusion of ceramics based on silicon nitride was analyzed. The influence of rotation of elongated grains on mass transfer processes and deformation rate is established. The influence of the parameters of the high-temperature deformation process on the deformation rate is shown. An equation is proposed that describes the effect of rotation of elongated grains on the strain rate. The described equation of strain rate can be used to create technological processes of plastic deformation of ceramic materials.
PERSPECTIVES OF ONTOLOGY REFACTORING
Authors: Karpovskyi Dmytro , Shynkarenko Viktor
Published: April 2024

Existing ontologies are supplemented and expanded in scope, increasing their complexity. Over time, integration issues arise with adding new knowledge to an ontology and maintaining existing ones. The problem is exacerbated by the fact that ontologies typically incorporate knowledge from databases and annotated documents in natural language, significantly increasing the volume and complexity of ontologies. This paper focuses on processing and analyzing existing ontologies and applying specific refactoring methods to enhance ontology and improve the readability of presented knowledge for developers and users. The development of corresponding software and metrics is carried out to objectively demonstrate the effectiveness of refactoring methods. During the research process, a certain list of patterns was identified that can be used for ontology refactoring, and one of them was implemented – the "Property Raising" pattern – transferring a property to a superclass. As a result of testing, it was found that after applying this pattern, the volume of the original ontology data file decreased by 3-5%, provided that the subclass contained common properties that were passed to the superclass.
MODELING OF TRANSIENT FUNCTIONS OF A WIND TURBINE WITH VARIABLE ROTOR PARAMETERS
Authors: Serhii. Tarasov , Oleh Molotkov
Published: April 2024

The work simulates transient processes in a system for stabilizing the rotor speed of a wind power plant with a vertical axis controlled by changing the length of the blades, taking into account the dependence of the design parameters of the system on time. It is shown that the stationary and nonstationary models are dynamically similar, and the stationary model is sufficiently accurate and efficient for preliminary calculations. Based on the modeling results, the magnitude of the dependence of regulation quality indicators was assessed, and a noticeable reduction in overregulation and the duration of transient processes was noted.
DETERMINATION OF THE RATIONAL COMPOSITION OF REAGENTS FOR THE COMPLEX REFINING OF LIQUID CAST IRON AT THE OUT-OF-FURNACE TREATMENT STAGE
Authors: L. Molchanov , V. Kislyako , V. Petrusha
Published: April 2024

The paper is devoted to the issue of complex treatment of cast iron. Possible chemical transformations that can occur when reagents are introduced into liquid cast iron are analyzed, and expressions for calculating the equilibrium constant Kr, depending on temperature, are obtained. Graphical dependences of the equilibrium constants on temperature for these reactions were also constructed. The calculations were performed for desulfurization reactions, carbonate dissociation reactions, oxidation of cast iron impurities due to interaction with carbon dioxide, and for the interaction of liquid cast iron components with iron oxides. Thermodynamic calculations have established that the mixture for the complex refining of liquid cast iron at the out-of-furnace treatment stage should belong to the chemical system CaO - Na2CO3 - FeO(Fe2O3) - Al. The specific ratio of components is determined by the required refining result.
DETERMINING THE ADEQUACY OF COMPUTER MODELS OF COMPLEX MULTI-CONNECTED OBJECTS
Authors: Selivorstova Tatyana , Potap Mykhailo
Published: April 2024

Proving the adequacy of models of complex, multi-connected objects such as continuous rolling mills poses a problem due to the impossibility of accurately reproducing the conditions of an industrial experiment during modeling. Most of the input and output variables in the given continius bar rolling mill computer model are not experimentally measurable and therefore cannot be compared with simulation results. It is proposed to determine the adequacy of such models by comparing the qualitative and quantitative effects of the mutual influence of various modeled parameters with similar effects, the presence of which has been clearly established in practice. The application of the specified method made it possible to test a new method of interstand tention regulation based on the data on armature currents of rolling mill motors.
APPLICATION OF EXPERT METHODS AND NEURAL NETWORKS FOR FORECASTING THE REMAINING RESOURCE OF TECHNICAL OBJECTS
Authors: Poshyvalov Volodymyr , Daniev Yuri
Published: April 2024

In the work, a comparative analysis of the use of an expert system based on a knowledge base with an expert system based on a neural network for determining the residual resource of technical objects is carried out. It is suggested to use expert methods and neural networks to build the dependence between the input parameters and the residual resource. At the same time, the data used to estimate the remaining resource can be based on both expert assessments and be obtained as a result of technical diagnostics of a technical object. The task of determining the residual resource based on measurements and expert assessments can be formulated as the task of approximating the function of many variables. These variables are the input parameters for building the neural network. Variables include data obtained during technical diagnostics during operation (exceeding parameters, change of environment, dynamic loads) and external factors. Next, some mapping is built in such a way that for each possible input image, an output is formed that characterizes the residual resource of the technical object.
MATHEMATICAL SIMULATION OF SPATIAL OSCILLATIONS OF RAILWAY ROLLING STOCK
Authors: Serhii Miamlin
Published: April 2024

The development of railway transport is accompanied by the introduction of innovative equipment and modern information technologies. The creation of railway rolling stock and rail machinery requires an assessment of their strength and dynamic qualities even at the stage of design and experimental production, therefore, the development of specialized software for evaluating the main parameters of the rolling stock structures being created is an urgent scientific and applied problem for railway transport and transport engineering. Theoretical studies of spatial fluctuations of certain types of railway rolling stock were performed and recommendations were obtained for the formation of parameters of the structures of freight cars and special rolling stock. When conducting theoretical research, the author's DYNRAIL-PRO software complex was used, which was verified and the reliability of the calculation results was proven.
COMPUTER SIMULATION OF NON-UNIFORM STRAIN DURING WIRE DRAWING
Authors: Konovodov Dmytro , Boiarkin Viacheslav , Boiko Maksym , Ivliev Oleksandr
Published: April 2024

Low-carbon steel wire traditionally takes a large part in the production of wire products. The quality of the finished wire, and specifically the level of mechanical properties, is affected by non-uniform strain during the drawing process. The uniformity of strain depends on the configuration of the drawing die, specifically the length of the die bell and the length of the die bearing. In industry, the die bearing is bored to the required diameter size in worn out dies during previous drawing. Considering the constancy of the die length, this leads to a change in the ratio between the lengths of the die bell and die bearing and to a change in the level of non-uniform strain. The influence of the die geometric parameters on the wire mechanical properties is often determined using the results of experimental investigations, which leads to significant costs of material and energy. FEM simulation makes it possible to reduce the number of experiments and predict the quality of finished products.
ASSESSMENT OF ESP32 MICROCONTROLLER COMPLIANCE WITH INTERNATIONAL STANDARDS OF CYBER SECURITY FOR INTERNET OF THINGS
Authors: Mazurenko Valeriy
Published: April 2024

The protection of the ESP32 microcontroller from cyber threats is studied by analyzing the compliance of the platform (microcontroller, OS, API, manufacturer support) with the requirements of international cybersecurity standards. In particular, the following topics are covered: means to manage reports of vulnerabilities, keeping software updated, securely storing sensitive security parameters, secure communication, and protecting personal data. Generally, it is concluded that the ESP32 microcontroller meets the cybersecurity standards of the Internet of Things. The only one exception that was found is the ESP32 manufacturer does not publish its vulnerability disclosure policy. Thus cybersecurity level of ESP32 platform should be considered as a quite high to produce a regular, household IoT system.
MODELING OF ALLOWANCE DISTRIBUTION DURING FORMING OF CYLINDRICAL GEAR WHEELS
Authors: Melnyk Volodymyr , Fyl Ruslan , Mikishchenko Oleksandr
Published: April 2024

When forming cylindrical gears, several processing operations are used. Allowances may be applied to processing operations. Methods and programs for the theoretical shaping of cylindrical gears with various parameters of the output contours, both standard and non-standard, as well as with modification, have been developed for the calculation. Theoretical forming is presented, according to the scheme of the rail forming the wheel for different displacement coefficients from x=-0.3 to x=+0.3. Thus, in order to create the required size and shape of the allowance, when designing a tool for processing a gear wheel, it is necessary to solve the direct and inverse problem of theoretical forming.
OPTIMISATION OF THE BOF PROCESS USING MACHINE LEARNING ALGORITHMS
Authors: Zhulkovskyi Oleg , Vokhmianin Hlib , Zhulkovska Inna , Panteikov Serhii
Published: April 2024

Traditional methods for optimising the BOF process in steelmaking are based on experience and rules of thumb, but do not always achieve maximum efficiency. As part of the Industry 4.0 concept, the use of machine learning algorithms is becoming a promising way to optimise production processes. They allow you to analyse large amounts of data collected by a variety of different sensors that operate during an industrial process and find complex relationships between parameters to achieve the best results. The created models can work automatically, analysing data in real time and responding to changes in the process. The use of machine learning algorithms can improve the accuracy of results and the quality of steel production by optimising the BOF process with a large number of parameters and their interrelationships.
CONCEPT OF A MOBILE APPLICATION TO IMPROVE THE MENTAL HEALTH OF UKRAINIANS
Authors: Tsaryk Vladyslav , Bychkova Daria , Klishch Serhii , Kaliberda Yurii
Published: April 2024

The development of a mobile application to support the mental health of Ukrainians is a crucial task in the modern world, given the increasing challenges in this area. This paper explores the strategies and methods for planning the development of such an application, focusing on the analysis of user needs, defining key functional requirements, selecting technological solutions, and developing methods for evaluating effectiveness and user impact. The study emphasizes the importance of a user-centered approach, ensuring that the application meets the specific needs and challenges faced by Ukrainians regarding mental health. By carefully planning each stage of development and considering the cultural and social context of Ukraine, it is possible to create an effective tool to improve the mental well-being of the Ukrainian population.
SATELLITE MONITORING OF WATER BODY POLLUTION ASSESSMENT BASED ON MACHINE LEARNING
Authors: Kavats Olena , Kavats Yurii , Dibrii Danilo
Published: April 2024

Satellite monitoring is a reliable tool for obtaining operational information about the state of water bodies and their changes with a certain periodicity, thanks to the use of a large set of heterogeneous data. And the availability of archival data becomes a significant advantage, opening up the possibility of comparing the obtained results and analyzing factors affecting the state of water bodies and the environment. The paper describes the main methods and datasets that can be used to apply remote monitoring methods based on machine learning. The use of medium spatial resolution data is proposed as the main data set. Examples of the application of the remote sensing approach to the assessment of water pollution in large areas are analyzed. Possible machine learning methods for solving an applied problem are presented, the new artificial intelligence (AI) approach of convolutional long-short-term memory (ConvLSTM) model significantly outperforms classical methods.
RESEARCH OF INTELLECTUAL MODELS FOR CLASSIFICATION OF UNCERTAIN DATA WITH REQUIREMENTS FOR RESULT RELIABILITY
Authors: V. Skalozub , V. Horyachkin , I.A. Terletsky
Published: April 2024

The report contains the results of research and development of intellectual models for managing complex systems under conditions of data uncertainty based on classification procedures, which ensure reliable solution of tasks considering the assessment of the boundary dimensionality of models. The possibilities of improving Hamming neural networks for data classification in formats of fuzzy variables and certainty factor CF(A) are investigated. The features of the mathematical model of classification tasks based on a set of feature templates are determined. A software complex of information technology for assignment/selection of performers, as well as determination of authorship of Ukrainian-language works based on classification of sets of templates with certain fuzzy features, is presented. The software complex utilizes the reduction and Cohen's kappa statistics procedures proposed in the report.
MANAGEMENT OF IT PROJECTS IN THE FIELD OF GAMEDEV
Authors: Dmytro Vysochin , Yuri Kaliberda , Tetyana Seliverstova
Published: April 2024

In the work, an analytical review of the most relevant state in the field of IT project management in the game studio, which releases its products on Microsoft Windows and Android OS platforms, is carried out. The data was collected between the last quarter of 2023 and the first quarter of 2024 by an employee of this company and is reliable at this time. The company that provided the data for writing the article has been on the Ukrainian market for more than six years and is well-known on digital distribution platforms such as Steam and Epic Store. Information from periodicals devoted to business analytics, finance, and project management was also used.
Apoyos económicos ocultos de la investigación rural
Authors: Rodríguez Patricia Itzel Nájera , Durán Jorge Eduardo Vieyra , Martinez Elizabeth Zavala , Maldonado Erika Patricia Gallaga , Vergara Cindy Emily Gómez , Bautista Daniel Téllez , Ontiveros Clara Isabel Meraz , García Laura Ivette García
Published: April 2024

Los procesos de investigación en la producción agropecuaria se enfrentan a diferentes retos. Por ejemplo: capital humano, recursos económicos, recursos técnicos y equipo etc. Sin embargo, el apoyo directo de las familias de campesinos y productores que funcionan como actores clave de la investigación es un reto que nunca ha sido visibilizado. Por lo cual, el objetivo de este estudio de caso fue visibilizar los apoyos económicos ocultos en la investigación, así como los antecedentes en las actividades agrícolas y ganaderas que motivaron a la familia para apoyar a los investigadores. El estudio fue realizado en la localidad de Piedra Negras del Municipio de Tlalixcoyan, en Veracruz; para lo cual se entrevistaron a siete mujeres que ocurrían a la casa que funciona como receptora utilizando la metodología de “historias de vida”.
Los resultados mostraron que las principales actividades fueron en tierras de cultivos (arroz y caña de azúcar), así como la evolución y el crecimiento de la comunidad, que se dio a partir de la lotificación de las tierras de cultivo. También se evidenció que algunas mujeres de esta familia realizaron estudios universitarios relacionados a sistemas de producción agropecuario, por lo que la experiencia propia en las etapas y costos de la investigación ha influido para dar apoyo a los investigadores y estudiantes. Otro hallazgo importante fue la posibilidad de conocer los costos reales de la estancia de la investigación a través de un estudio comparativo de los servicios que se ofrecieron a los investigadores en la casa receptora contra los restaurantes y hoteles de la localidad.
Finalmente, cada una de estas acciones han permitido a los investigadores seguir realizando trabajo de campo para dilucidar las condiciones socioeconómicas actuales.
¿Es prioritaria la salud o la genética de las razas autóctonas?
Authors: Yáñez Bernardo A. López , Villagómez-Cortés José Alfredo , Devezé-Murillo Patricia
Published: April 2024

Las razas autóctonas son recursos poco valiosos para los grandes productores, sin embargo, podemos verlos como reservorio genético, estos suelen ser animales en manos de población económicamente de bajos recursos, por lo que presentan mayores riesgos sanitarios que los animales altamente especializados en explotaciones comerciales.   Ante un problema de enfermedades trasmisibles ¿Que debemos hacer?... Ese es el planteamiento que un genetista responde de una forma y un veterinario de la salud de otra, lo cual nos lleva a la pregunta inicial. ¿Es prioritaria la salud o la genética de las razas autóctonas? Existen múltiples respuestas, cada lector debe bajo su criterio definir su postura.
História ambiental e ensino de história: caminhos possíveis
Authors: Pino Juliana Pereira
Published: April 2024

O presente trabalho pretende fomentar o debate sobre o Meio Ambiente e as diferentes correntes da Educação Ambiental no ensino de História com base no que foi apurado na pesquisa de mestrado intitulada “Da Horta Escolar a História Ambiental: Uma Pesquisa Ação Participante sobre meio ambiente e Ensino de História” ligada ao Programa de Pós-Graduação em História da Universidade Federal de Rio Grande – FURG e ao Grupo de Trabalho Pesquisa e Extensão em História Ambiental – GTPEHA, sob a orientação do Prof. Dr. Daniel Prado. A pesquisa foi desenvolvida em duas escolas públicas estaduais em cidades distintas: E.E.E.M. Professor Carlos Loréa Pinto em Rio Grande de maio a novembro de 2013 e E.E.E.M. Marechal Soares de Andréa no Chuí entre os meses de junho a dezembro de 2014. Nossa investigação corrobora o fato de que nas últimas décadas o ensino de história tem se renovado com relação à temática do meio ambiente. Ainda que a questão ambiental não se encontre enraizada nos conteúdos programáticos da disciplina na maioria das escolas, são notáveis os esforços de docentes e pesquisadores desta temática (Carvalho 2010, 2011, 2012, Gerhard e Nodari, 2007). Neste sentido, docentes desta disciplina buscam atualização a fim de conhecer e ampliar as bases teóricas e metodológicas para transformar a prática. Assim, este artigo tem como objetivo fomentar o debate sobre as possibilidades de diálogo entre história ambiental, e o ensino de história como prática e campo de pesquisa, revisitando uma cartografia da educação ambiental com o propósito de estimular indagações, discussões e o surgimento de novos projetos para o ensino.
Biochemical analysis of bullfrog liver and blood: insights into growth and development
Authors: Marcantonio Adriana Sacioto , Marin Matheus Phelipe , Bach Erna Elisabeth , França Fernanda Menezes , Mello Mikel Eduardo de , Faria Rafael Lopes , Ferreira Claudia Maris
Published: April 2024

The aim of this study was to evaluate the productive and physiological performance of bullfrogs (Lithobates catesbeianus) after metamorphosis, through zootechnical growth parameters and the quantification of proteins and enzymes present in the liver. In addition we observed the behavior of circulating amino acids in the blood. The experiment was conducted at the Experimental Station of the Aquaculture, APTA Regional – SAA, in São Paulo, Brazil. We used 400 L. catesbeianus froglets weighing 5.76±1.32g, which were distributed in four fattening tanks in the wet system, installed under an agricultural greenhouse at  density of 51 frogs/m². The animals were fed with 5% of the biomass of each tank every day, with extruded feed for carnivorous fish with 40% Crude Protein. Every 28 days, they were weighed to calculate weight gain and apparent feed conversion ratio. At the same time, two animals from each tank were chosen randomly to have their blood and liver collected for biochemical analysis to quantify amino acids, proteins, phenols, peroxidase and polyphenol oxidase. The results obtained indicate that the absence of screening every 15 days affected the development and uniformity of the animals, favoring cannibalism. The average apparent feed conversion was 1.84. There was an increasing and proportional formation of proteins with low degradation as the animals gained weight. As for amino acids, we detected arginine, isoleucine, alanine and tryptophan in the first month, with trypsin appearing after 60 days. These results lead us to state that total or partial screening is essential during the first month after metamorphosis, and that the feed provided, although not specific to the species, fulfilled its role in animal metabolism, with little formation of phenolic compounds and free radicals.
Uso da cartografia no planejamento ambiental da agropecuária Vale das Uvas: um estudo de caso
Authors: Campos Clarismar de Oliveira , Rocha Ruy de Carvalho , Souza José Humberto Felix de
Published: April 2024

A Agropecuária Vale das Uvas, provem da fusão de duas propriedades, Vale das Uvas e Orgânica do Vale, ambas pertencentes à Labrunier, grupo esse composto de cinco fazendas localizadas no Polo Petrolina/Juazeiro. A Agropecuária Vale das Uvas é uma empresa voltada para produzir uvas finas de mesa, que ao longo dos anos, tem procurado aprimorar esse conceito, atendendo assim as exigências cada vez maiores dos mercados consumidores, além de que tinha que se adequar as Leis ambientais do Brasil.Para tanto, utilizou-se de várias ferramentas, levantamentos e confecção de mapas com a finalidade de implementar o Plano de Gestão Ambiental (PGA), tendo em visto que o mercado urge por mudanças. Assim sendo, objetivou-se com esse trabalho executar um mapeamento da área da Agropecuária Vale das Uvas, com visualizações das parcelas produtivas e áreas de preservação, tendo em vista executar um Programa de Gestão Ambiental com base na equidade social, equidade econômica e preservação do meio ambiente.