bluuebunny/crossref_metadata_2025 huggingface dataset:
STUDY OF INTERRELATIONSHIPS BETWEEN MINING SCHEDULE PARAMETERS, DEPOSIT CONFIGURATION AND DEVELOPMENT SYSTEM PARAMETERS UNDER VARIABLE PRICES OF THE MINING CLUSTER PRODUCTS
Authors: Hryhoriev Yulian , Monastyrskiy Yurii , Plotnikov Oleksandr , Bohomaz Olha
Published: January 2025

Purpose. The study investigates the impact of the dynamic minimum cutoff grade on the parameters of the open-pit development system for steeply dipping deposits and the optimization of mining schedules under variable market conditions for iron ore products.

Methods. The study uses methods of engineering analysis, synthesis, and generalization of information from various literary sources, along with multi-scenario modeling of the mining-geometrical parameters of the deposit.

Findings. The analysis of scientific research allowed to formulate theoretical principles and mathematical approaches to the management of the mining operations schedule in the context of dynamic changes in market conditions for the products of mining enterprises. To ensure flexible adaptation of the open-pit production system, it is proposed to apply a dynamic minimum content of the useful component. An analytical justification of the key parameters of the development system – the width of the working platform and the length of the ore front – was performed. Calculations have shown that with the increase in the dynamic minimum content of the useful component, the width of the working area increases, and the length of the ore front decreases due to the reclassification of part of the ore ledges as opencast. Variants of the mining operation schedule depending on the values of the dynamic minimum content of the useful component are modeled. The results obtained can be used to develop a calendar plan for mining operations in changing environmental conditions.

Originality. The concept of dynamic minimum content of useful component is proposed as an adaptive tool for operational management of mining operations in conditions of variable market factors. The dependence of the width of the working platform on the interaction between the qualitative indicators of the ore and the angle of slope of the working side is substantiated..

Practical implication. The developed approaches allow to increase the flexibility of the open-pit production system, reduce the costs of forming working areas, and improve the economic efficiency of the open-pit operation in the conditions of changing conditions of the iron ore market.

Keywords: dynamic minimum cutoff grade, dynamic external environmental conditions, mining schedule parameters, working bench width, bench slope angle, mining front.
MATHEMATICAL MODEL OF TEMPERATURE DISTRIBUTION IN ROCK SAMPLE DURING HEATING
Authors: Saik Pavlo , Berdnyk Mykhailo
Published: January 2025

Purpose. This study aims to develop a mathematical model for temperature distribution in the rock sample during heating, which will serve as the foundation for determining the parameters of mechanical and physical property changes in the rock mass under high temperatures.

Methods. A comprehensive approach was applied, incorporating methods and techniques for studying temperature distribution. The numerical model was based on assumptions that simplify the problem of determining the temperature field T(x, y, t) to the integration of the heat conduction differential equation. MATLAB software was used to solve this system of equations and to analyze and solve such tasks efficiently

Findings. The study revealed insufficient research on temperature field distribution in the rock sample. A detailed analysis of heat transfer processes in rocks was conducted. The results showed how the temperature field spreads depending on rock properties, the geometry of the research object, and temperature parameters. The model developed is suitable for simulating the thermal effects of the combustion face on the rock mass during underground coal gasification. The temperature field changes in relative units as a function of the heating duration were obtained and demonstrated using an argillite sample.

Originality. This is the first mathematical model developed to describe temperature distribution in the rock sample during heating. The model considers the impact of the temperature field formed from the contact plane, specifically the combustion face with the immediate roof. It describes heat transfer processes and ensures accurate modeling of the rock mass temperature state under actual conditions during underground coal gasification.

Practical implication. The practical value of the developed model lies in its application to solve practical tasks in geotechnology for underground coal gasification. It can be adapted to actual conditions for conducting underground coal gasification processes and further analysis of the physical and mechanical properties of the rock mass under the influence of high-temperature zones in the underground gasifier.

Keywords: underground gasification, rock mass, temperature field, mathematical model, heat conduction.
MARINE GAS HYDRATES. FEATURES OF DEVELOPMENT BY THE DEPRESSION METHOD
Authors: Safronov Anatolii
Published: January 2025

Purpose: to characterize in detail and highlight the advantages and disadvantages of the depression method of developing marine gas hydrates.

Methodology: the depression method was used as one of the methods of developing marine gas hydrates.

Findings: To analyze the depression method and highlight the main advantages and disadvantages of this method.

Originality consists in the detailed review and highlighting of key aspects of the depression method and the relevance of its application.

Practical implication: the depression method can be used for gas hydrates whose saturation in the formation is insignificant, which will help in the further development of production.

Keywords: gas hydrates, marine gas hydrates, methods of developing gas hydrates from deposits, depression method of development.
PARAMETERS OF THE SHEAR PROCESS OVER ABANDONED MINE WORKINGS
Authors: Feofanov Andrey
Published: January 2025

Purpose. The aim of the work is to establish the parameters of the displacement process during the activation of the rock mass above abandoned (old) mine workings preserved at shallow depths, timed to the outcrops of coal seams under sediments.

Methodology. The paper uses archival materials on the history of the Donbas coal industry and the results of instrumental observations obtained at observation stations over several decades.

Results. The results of the research have established the relative value of the maximum subsidence, the limiting angles and the angle of maximum subsidence during deformation of the rock mass and the earth surface in the zone of influence of abandoned mine workings.

Scientific novelty. The scientific novelty lies in establishing the parameters of both the landslide zone in the near-surface rock strata and the damage zone on the earth’s surface when the landslide process is activated over abandoned mine workings, taking into account the mining and geological conditions of occurrence, and in creating a fundamentally new approach to assessing the degree of danger to the earth’s surface of old mine workings.

Practical significance. It is possible to apply the results of the studies and established patterns to assess the degree of danger of such workings to the earth’s surface and surface objects in the area of their influence, as well as to develop an appropriate assessment methodology.

Key words: abandoned mine workings, clean-up operations at shallow depths, local subsidence, degree of metamorphism, research results, parameters of the landslide process.
Calibração de sensores tipo PT100 com fornos tipo bloco seco
Authors: De Farias William Fagundes , Pepe Vinicius da Rosa , Ackermann Andres Eberhard Friedl
Published: January 2025

O presente artigo aborda a calibração de sensores de temperatura PT100 usando fornos com bloco seco. A exploração das contribuições individuais das incertezas de medição no processo de calibração é importante fonte na avaliação do processo de calibração e na estimativa dos erros e incertezas associadas aos sensores termorresistivos. O detalhamento do método e a utilização de um meio térmico estável corroboram para uma adequada calibração de sensores PT100 aplicando fornos com bloco seco. Os resultados demonstram uma precisa e exata correlação entre as grandezas envolvidas no método de calibração, bem como destacam as variáveis operacionais críticas ao processo.
The Train-of-Four Ratio in Patients Fulfilling Clinical Criteria for Extubation
Authors: Chanchayanon Thavat , Pongsiriwan Supawan , Nimmaanrat Sasikaan , Kitsiripant Chanatthee , Wittayanupakorn Natsana , Samakkee Anongluk
Published: January 2025

Objective: Neuromuscular blocking agents are commonly used in patients undergoing general anesthesia with an endotracheal tube. This can result in residual neuromuscular blockade and respiratory complications. The decision to extubate is usually based on clinical criteria assessment. This study aimed to investigate the train-of-four (TOF) ratio in patients having fulfilled the clinical criteria before extubation.Material and Methods: This prospective observational study recruited 294 elective adult patients, with American Society of Anesthesiologists classification I-III, having undergone general anesthesia using muscle relaxants. The baseline TOF ratio was measured before surgery. Once the surgery was finished, the endotracheal tube would be removed if the patient fulfilled the clinical criteria for extubation. The TOF was immediately measured before extubation, and upon postanesthesia care unit (PACU) arrival. The TOF ratio was normalized by dividing it with the baseline TOF ratio.Results: The overall median interquartile range (IQR) for the normalized TOF (nTOF) outcomes before extubation was 0.87 (0.74, 0.98). Of the 294 patients, 162 (55%) and 132 (45%) had a nTOF ratio of <0.9 and ≥0.9, respectively. On PACU arrival, the overall median IQR TOF ratio was 0.9 (0.8, 0.98), with 51% and 49% of them having had an nTOF ratio of <0.9 or ≥0.9, respectively. Conclusion: In patients fulfilling the clinical criteria for extubation, approximately half of them demonstrated residual neuromuscular blockade (nTOF <0.9) immediately before extubation and upon PACU arrival. Close observation and monitoring of patients receiving muscle relaxants should be warranted.
Evocación espontánea y entrevista en profundidad: un acercamiento a las representaciones sociales de la comunicación docente y estudiante en la educación superior
Authors: Klett Aparicio Bárbara , Neira-Mellado Carola
Published: January 2025

Introducción: Esta investigación examina las representaciones sociales de la comunicación entre docentes y estudiantes en la educación superior en Chile asumiendo que la realidad de la educación superior en el país está situada en una exitosa industria de la educación, abierta al mercado y regulada por procesos de acreditación. Metodología: Se utiliza una aproximación complementaria de evocación espontánea y entrevistas en profundidad para explorar las representaciones sociales de docentes de educación superior, sobre la comunicación sostenida con sus estudiantes. Resultados: Se identifican tres tipos de comunicación: paternalista, académica y asociada a la formación y experiencia. Igualmente, resalta la percepción de carencia de lineamientos institucionales claros sobre el tipo de comunicación esperada. Discusión: Emerge la importancia de comprender la comunicación en un contexto de competitividad y rendimiento en las instituciones de educación superior dado que la investigación revela una diversidad de representaciones sociales percibidas como mediadas y derivadas del modelo educativo. Conclusiones: Si bien el presente estudio ofrece avances para delinear aspectos relacionales derivados de la comunicación docente-estudiante, futuras investigaciones requieren incorporar la perspectiva de estos últimos, permitiendo abordar las representaciones y los factores que median en el proceso de interacción entre ambos actores.
Juventud y ocio deportivo de equipo: Revisión sistemática
Authors: Novoa López Julio Alfonso , Hossein-Mohand Hassan , De-Juanas Oliva Ángel , Hossein-Mohand Hossein
Published: January 2025

Introducción: La participación social en actividades de ocio deportivo durante el tiempo libre de las personas jóvenes es un factor importante que puede influir en la personalidad, el comportamiento y la calidad de vida de este colectivo. Metodología: Este trabajo sigue el método PRISMA para analizar las evidencias aportadas por diversas investigaciones en español y en inglés. Se circunscribieron todas las publicaciones con resultados empíricos que fueron publicadas en los últimos tres años y recogidos de las bases de datos: Web of Science, Scopus y Dialnet. Se procedió a un cribado y selección de publicaciones que ofreció una selección final de 49 manuscritos. Resultados-Discusión: Los resultados sugieren la aparición de las causas que llevan a las personas jóvenes a practicar actividades de ocio deportivo de equipo o bien abandonarlo, recogiendo la influencia que tiene este ocio en el desarrollo personal mejorando la salud física y mental mediante la participación deportiva en las situaciones propias de la vida cotidiana, atendiendo a las poblaciones vulnerables, el acoso y el abuso sexual. Asimismo, se evidencia la influencia de las redes sociales en la práctica de este tipo de ocio. Conclusiones: Por ello, estas actividades pueden beneficiar a los programas e intervenciones con jóvenes.
Інклюзивні практики країн ЄС та України з підготовки дітей до соціальної взаємодії : навчально-методичний посібник
Authors:   Vinnytsia Mykhailo Kotsiubynskyi State Pedagogical University, Хіля А.
Published: January 2025

У навчальному посібнику узагальнено та представлено сучасний європейський інклюзивний досвід підготовки дітей з особливими потребами до соціальної взаємодії. Розкрито методологічні та наукові підходи до соціально-педагогічної роботи з дітьми з особливими потребами. Дослідження було реалізовано в рамках роботи над модулем «Соціальна інтеграція дітей з особливими потребами в середовищі розмаїття та інклюзії: Європейські підходи» проєкту: 101085267 - SEEDUE4UA - ERASMUS-JMO-2022-HEI-TCH-RSCH (2022-2025) Презентовано можливості та досвід формування особистісної та соціальної компетентності дітей в умовах інклюзії в українських закладах освіти за європейськими підходами. Представлено науково-методичний контент з викладання модуля: конспекти лекцій, завдання для практичних робіт, творчі проекти, питання та тести для контролю. Навчально-методичний посібник призначений для викладачів та студентів, які будуть викладати та вивчати модуль. Матеріали, представлені у посібнику, будуть корисними для дослідників, практиків та інших зацікавлених осіб.
‘The Seasons’
Authors: Li Chunyang , Guo Ziliang , Ou Yuan
Published: January 2025

The art of landscape painting involves a coherent chain of development and transformation between individual self-awareness and the construction of a scholar's emotions. These paintings directly explore personal consciousness and expressing personal emotions. The main themes depicted in seasonal landscape paintings are seclusion and travel. The relationship between scholars’ self-awareness, landscape painting portrayal and the emergence of literature is explored by analysing the emotional states and life interests inherent in the composition of these two themes of landscape painting. The connection between changes in landscape painting themes and the emotional content carried by scholars, as well as the relationship between seasonal development in landscape paintings and scholars’ literary explorations and poetic expressions, is discussed. Consequently, the themes of seclusion and travel contain contemplation of life and aesthetic interests, revealing connections between these themes, scholarly pursuits, and the unity of poetry and painting.
A New Cyborg Feminist Paradigm as Multilithic Print
Authors: Hammond Lauren
Published: January 2025

This article reimagines discourses around race and gender within collaborative cultural productions by investigating how trauma is computed via visual images and human-computer interactions. I argue the use of digital collaborative formations—particularly that of oppositional writing in socially mediated spaces—provokes modes of encounter that enact a shared distributed experience of different ways of printing new paths in and out of trauma. By analyzing the digital storytelling taking place in “Breonna's Garden,” an augmented reality application that tells the story of Breonna Taylor, I clarify how digital technologies serve as an avenue for transformative recoding of the mechanisms of racialization.
Eat Me, Bones and All
Authors: Phillips Marian A.
Published: January 2025

In the early 2020s, queer cannibalism rose in significant popularity with films such as Luca Guadagnino's Bones and All (2022). This article investigates this growing phenomenon of queer cannibalism in horror films as a mode of articulating queer desire and isolation. It poses the question, when queer stories are intertwined with cannibalistic tendencies, what does the consuming of human flesh determine about their existence? Through a queer and feminist theoretical lens, I outline the social, cultural, and political influences that construct particular narratives through an analysis of Bones and All (2022). As a result of this analysis, I locate the uses of queer cannibalism in horror media as a means of rejecting oppressive social and cultural constructions of desire as well as its operating as a method of articulating a desire for acceptance and, in many instances, love.
SALA DE AULA INVERTIDA - SAI E A APRENDIZAGEM BASEADA EM TIMES – TBL: METODOLOGIAS ATIVAS NO ENSINO DE QUÍMICA
Authors: Correia Edvaldo Amaro Santos , Melo Elda Silva do Nascimento , Lopes Bruno Galdino , Santos Elton Ovidio dos , Gomes Fabiano do Espirito Santo
Published: January 2025

O foco deste trabalho foi colaborar com a compreensão e aplicação do uso das MA nas atividades pedagógicas no ensino-aprendizagem, proporcionando aos envolvidos no processo uma proximidade maior entre a qualidade pedagógica que desejamos e as mudanças tecnológicas que a modernidade nos proporciona. Para dar mais credibilidade ao estudo foram realizadas várias atividades online e offline para que pudéssemos comprovar que as MA podem ser sim uma aliada no processo ensino-aprendizagem. Sendo assim, foi possível utilizar as MA’s Sala de Aula Invertida-SAI e aprendizagem baseada em Times-TBL em sintonia com os conteúdos, favorecendo a socialização, o protagonismo e o envolvimento do estudante, através de um ambiente prazeroso e construtivo.  A utilização de metodologias específicas como prática pedagógica favoreceu o bem-estar e a atualização com relação às novas tecnologias e sua disciplina, dessa forma, os estudantes puderam exprimir suas opiniões sobre a metodologia utilizada e sugerir otimizações.
PENGARUH MODEL PBL DENGAN PPT INTERAKTIF TERHADAP PENINGKATAN BERPIKIR KRITIS PADA TEMATIK KELAS V DI SD
Authors: Fitri Dina Martha , Widiyati Amanda Surya , Oktaria Sheren Dwi
Published: January 2025

Masalah dalam penelitian ini yaitu rendahnya tingkat kemampuan berpikir kritis peserta didik kelas V di SD Negeri 2 Hargomulyo.     Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan Model Problem Based Learning dengan PPT Interaktif terhadap peningkatan berpikir kritis peserta didik kelas V SD dan mengetahui perbedaan kemampuan berpikir kritis antara kelas eksperimen dan kelas kontrol. Metode penelitian ini adalah Quasi Experimental Group Design. Pengujian hipotesis yang pertama untuk melihat pengaruh menggunakan uji regresi linear sederhana, kemudian untuk melihat adanya perbedaan menggunakan uji t-test. Hasil penelitian ini adalah terdapat pengaruh yang signifikan yaitu lebih dari 60 % dari model Problem Based Learning dengan PPT Interaktif terhadap kemampuan berpikir kritis peserta didik kelas V di SD Negeri 2 Hargomulyo
PENGGUNAAN DASHBOARD UNTUK LAPORAN KEGIATAN PERKULIAHAN
Authors: Sari Meilida Eka , Wahidin Wahidin , Mikaresti Pamela , Ardiansyah Novriza Wahyu , Kartiwi Asti Putri , Mesterjon Mesterjon , Susanto Edy , Saputra Cholin Edi , Fahmi Marhalis , Utama Nico Vantra , Zahra Hanifah Yulia Az , Martiani Martiani
Published: January 2025

Laporan perkuliahan pada Universitas Terbuka Bengkulu untuk perkuliahan menggunakan tutorial berbasis web, tutor wajib membuat laporan setiap sesi menggunakan dashboard tutorial. Penelitian ini bertujuan untuk mengetahui penggunaan dashboard untuk laporan kegiatan perkuliahan. Metode penelitian menggunakan pendekatan kualitatif, fokus mengkaji penggunaan aplikasi dashboard, instrumen dalam penelitian ini dibagikan melalui google form. Kesimpulan dari penelitian ini penggunaan Penggunaan Aplikasi Dashboard Tutor-UT Bengkulu untuk pembuatan laporan perkuliahan tutorial webinar sangat efektif. Diharapkan bahwa penelitian lebih lanjut akan meneliti kendala dan efektivitas penggunaan dashboard tutor-UT.
Risk Factors for Under-Five Children Severe Acute Malnutrition (SAM) in Grobogan Regency
Authors: Nuryanto Nuryanto , Sidhin Syaharani , Fala Etika Nurul , Nissa Choirun , Candra Aryu , Purwanti Rachma , Fitranti Deny Yudi , Rustanti Ninik , Habibi Nur Ahmad
Published: January 2025

Severe Acute Malnutrition (SAM) is a major health risk for children under five. Various factors, such as poor food intake, infections, family size, healthcare participation, maternal nutrition knowledge, and parenting practices, contribute to SAM. However, no studies have specifically examined these factors in under-five children in Grobogan Regency. This study aims to analyze the risk factors associated with severe acute malnutrition among children under five years old in Grobogan Regency. The study employed a quantitative case-control design involving children aged 0-59 months in Grobogan Regency, with 11 children with Severe Acute Malnutrition (SAM) as the case group obtained through total sampling, and 11 well-nourished children as the control group selected via matching. Key variables examined included energy, protein, fat, and carbohydrate intake, as well as infectious diseases, family size, participation in posyandu, maternal nutrition knowledge, and parenting practices. Descriptive analysis outlined the subjects and variables, with bivariate analysis using the Chi-Square test at a 95% confidence level (α=0.05). The results study show that the statistical analysis indicated that inadequate energy intake was significantly associated with SAM (p=0.008, OR=26.667), suggesting that children under five with insufficient energy intake are 26.667 times more likely to experience severe acute malnutrition compared to those with adequate energy intake. In contrast, adequate intake of protein, fat, and carbohydrates, as well as factors such as infectious diseases, family size (p=0.080), participation in posyandu (p=1.000), maternal nutrition knowledge (p=0.476), and parenting practices (p=0.198), did not demonstrate significant associations with SAM among these children. The conclusion is adequate energy intake has been identified as a significant risk factor for SAM among under-five children in Grobogan Regency. Conversely, factors such as adequate intake of protein, fat, and carbohydrates, infectious diseases, family size, participation in posyandu, maternal nutrition knowledge, and parenting practices were not recognized as significant risk factors.
Comparison of Lipid Profiles among Vegan Vegetarians, Lacto-Ovo Vegetarians and Non-Vegetarians
Authors: Sineri Dessy Ikasartika , Nurwati Ida , Sumardiyono Sumardiyono
Published: January 2025

The lipid profile is a crucial indicator of cardiovascular disease risk, with elevated levels often influenced by dietary patterns. Nutrient intake and physical activity can help regulate cholesterol by reducing total cholesterol, HDL, LDL and triglyceride levels. This study aims to compare the lipid profiles among vegan vegetarians, lacto-ovo vegetarians, and non-vegetarians. This research uses a cross-sectional study design. The study population includes 60 participants from IVS and the Yogyakarta community, selected based on inclusion and exclusion criteria. The research examines diet type as the independent variable, lipid profile as the dependent variable, and physical activity as a confounding variable. Data collection involves respondent identity and a physical activity questionnaire using IPAQ. Statistical analyses include one-way ANOVA, Post Hoc tests and multivariate analysis with one-way MANCOVA. The research results show that the total cholesterol level for vegan (173.10±21.04), lacto-ovo (169.45±44.84), and non-vegetarians (194.55±31.40). HDL levels for vegan are (55.25±10.79), lacto-ovo (49.00±9.12), and non-vegetarians (45.49±9.11). LDL levels for vegan are (111.90±19.80), lacto-ovo (114.85±44.39), and non-vegetarians (134.90±30.37), showing no significant difference p>0.05. Triglyceride levels for vegan are (103.15±57.06), lacto-ovo (100.65±60.07), and non-vegetarians (154.15±88.63) with significant differences p-value <0.05. When controlling for physical activity, differences in total cholesterol, HDL, and triglycerides persist between diet groups. Notably, HDL levels differ significantly between vegans and lacto-ovo (p<0.05). The conclusion is that both vegan and lacto-ovo diets have lipid profiles within the normal range compared to non-vegetarian diets. A vegetarian diet and regular physical activity contribute to a healthier lipid profile.
The Effect of Contact Time Variations of Activated Carbon from Coconut Shell on the Peroxide Value in Used Cooking Oil
Authors: Djohan Herlinda , Sungkawa Hendra Budi , Chitra Fara , Ningsih Nur Reza
Published: January 2025

Cooking oil is a commonly used food product in daily life, both in households and commercially, especially for frying purposes. The repeated use of cooking oil can lead to an increase in peroxide value, which may pose health risks. High peroxide values are carcinogenic and can trigger various health problems, such as elevated cholesterol levels and heart disease. One method to reduce peroxide value is by using activated carbon, such as activated carbon derived from coconut shells. This study aims to analyze the effect of contact time variations of activated carbon from coconut shells on the reduction of peroxide value in used cooking oil. The research design used was a quasi-experiment with an iodometric testing method. A total of 24 samples of used cooking oil were treated with activated carbon from coconut shells for different contact times: 20 minutes, 30 minutes, and 40 minutes. The peroxide value was then measured. The results showed that varying the contact time with activated carbon from coconut shells resulted in the following average peroxide values: 15.57 meq O2/kg, 7.57 meq O2/kg, 6.58 meq O2/kg, and 5.82 meq O2/kg. The percentage reduction in peroxide value was 0%, 51.41%, 57.06%, and 62.64%, respectively. In conclusion, the study found a significant effect of contact time variations of activated carbon from coconut shells on the reduction of peroxide value in used cooking oil, with a probability value of 0.000 < 0.05.
Determination of energy parameters of vibrating machines for compaction and formation of concrete products according to different power form of load
Authors: Nazarenko Ivan , Zapryvoda Andrii , Bondarenko Andrii , Slyusar Volodymyr
Published: January 2025

The paper investigates and determines the parameters and energy indicators of vibrating machines with harmonic and vibroshock modes of motion for compaction of concrete mixtures. The equations of motion of the vibration system "working body of the machine - compaction medium" are made on the basis of a hybrid discrete-continuum model, which adequately describes the real process of compaction of the mixture. Calculations were made on the basis of the obtained analytical dependencies to determine the amplitudes of oscillations and the oscillation energy of a two-seater The systems made it possible to assess their changes in different modes of operation. Thus, the first resonance was recorded at a frequency of 5 Hz, and the second at a frequency of 35 Hz. For the action of an external force on the first mass, the resonance mode is determined by the parameters of the second mass, including the energy dissipation coefficient and the ratio between these masses. The conditions for the influence of dissipation in the resonance mode at a frequency close to the partial natural frequency of the mass on which the external force acts have been determined. The energy parameters of the vibrating percussion system have been investigated and determined. The equations of motion of a vibro-percussion installation as a model with discrete-continuous parameters are given and solved.
Amplitude and skeletal characteristics are given, the influence of parameters on their change is determined, and two ways of implementing the resonance mode are revealed: by changing the frequency of the harmonic force, and at the same time, the possibilities of controlling the movement of the installation by changing the frequency and the value of compression of the limiter by a constant force are determined. Formulas for determining the energy parameters of a vibro-percussion installation, which take into account the discrete parameters of the machine and the distributed parameters of the concrete mixture, have been obtained.
Some approaches to modeling blast wave impact on structures in LIRA-FEM
Authors: Barabash Mariia , Bashynskyi Oleksii
Published: January 2025

The article is devoted to the methodology of modeling the calculation of structures for the action of dynamic loads caused by the impact of a blast wave and considers in detail the process of applying these dynamic loads to building structures in the LIRA-FEM software. This article describes the main stages of the calculations, starting from the calculation of the main parameters of the blast wave to the collection and application of dynamic loads to structural elements to perform the calculation by the direct dynamic method.
One of the key aspects of the article is to determine the main parameters of the blast wave that affect the magnitude and nature of the effects of the explosion loads. These parameters include pressure peak, blast wave duration, blast wave impulse, and wave front shape. The article discusses the typical values of these parameters depending on the explosion conditions, such as the type of explosive and the distance to the explosion epicenter.
The preference is given to modeling the effect of explosive loads on a structure as a dynamic impact. Such an impact can lead to significant deformations of structures and reveal additional features of the structure.
The article also describes the sequence of analysis of structures for explosive loads, which includes several stages. The first step is to determine the type of explosive device and its parameters, as well as the distance from the epicenter of the explosion to the structure. Next, the static load (pressure) from the blast wave is calculated and applied to the structural elements. The next step is to set the dynamic parameters of the blast wave, which are determined using special methods or regulatory documents. At the final stage, calculations are performed using the Time Dynamics module of the LIRA-FEM software package, which allows taking into account dynamic effects and assessing the behavior of the structure during the blast wave action.
Redistribution of forces in foundation structures of a building made of precast reinforced concrete depending on the type of panel connection
Authors: Kryvenko Oleh
Published: January 2025

Reinforced concrete monolithic frames are widely used in the construction of high-rise buildings. One of the main advantages of such a frame is the possibility for architects to freely plan spaces (walls, pilasters, columns), while for design engineers, it ensures an even redistribution of forces in the load-bearing elements, which leads to more uniform settlement of foundations. At the same time, the construction of monolithic buildings is a rather time-consuming process, so to accelerate construction timelines, the load-bearing structure is often made of precast reinforced concrete. However, considering that in precast concrete, structural elements are connected through mortar and embedded parts, it is more challenging to achieve an even distribution of forces under the vertical load-bearing elements of the frame compared to a monolithic frame, where the entire building acts as a single rigid disc. Uneven settlement is also influenced by the fact that there are self-supporting panels and panels that support floor slabs (from one or both sides).
The stiffness of load-bearing structures (and consequently the building as a whole) in a panel building primarily depends on the connection of panels with each other. Depending on how the panels (as well as floor slabs) are connected, different displacements will occur, which in turn create additional forces in the foundation structures, ultimately causing uneven redistribution of forces in the pile field.
Based on the above, we can conclude that studying the effect of panel jointing on the redistribution of forces in the foundation structures of high-rise panel buildings is a relevant task.
The purpose of this work is to investigate the influence of panel jointing in a high-rise residential building on the stress-strain state of foundation structures based on numerical modeling of the "base-foundation-superstructure" system.
Justification of the technological possibility of connecting rolled polyethylene film with adhesive seams during the construction of anti-flood dams with diaphragms
Authors: Petrochenko Oleksii
Published: January 2025

Polyethylene is the most common material of films used in hydraulic construction. In the process of construction of hydro technical structures, rolled polyethylene film, manufactured in factory conditions, is connected into continuous anti-filtration structures: screens, diaphragms, curtains. A reliable method of joining the edges of polyethylene film is welding. But in some cases, for example, during the construction of anti-flood dams with anti-filtration diaphragms using a high-performance trenchless method of laying rolled polyethylene film in the soil, there is a need to use a more convenient method of joining the edges of the film, namely gluing. However, it is known that polyethylene, being a non-polar polymer, does not have sufficient adhesion to adhesives. In the article, the possibility of using the operation of gluing polyethylene film in certain processes of hydraulic construction is substantiated by successively conducting theoretical, experimental and field studies. According to the results of theoretical studies of the stress-strain state of adhesive seams of thin films made of materials obeying Hooke's law, it was established that the use of adhesives with a small modulus of elasticity provides a more uniform distribution of tangential stresses across the seam, compared to the use of adhesives with a large modulus of elasticity, which helps to increase the tensile strength of the adhesive seam of the films. This theoretically obtained result was first accepted as a hypothesis, and then confirmed by experimental studies. Samples of polyethylene film, connected with the help of glues with different modulus of elasticity, were tested for stretching on the MP-05-1 machine. It was established that with the use of rubber-based adhesives, the destruction of the adhesive seams of the films occurred at the moment when the tensile stress in the samples of polyethylene films in all cases exceeded the yield point of polyethylene. According to the results of field studies of the process of trenchless laying of rolled polyethylene film during the construction of earthen anti-flood dams with anti-filtration diaphragms, the possibility of joining the edges of the polyethylene film using glue based on nairite rubber was established.
Modal analysis of a thin coupled composite shell
Authors: Krivenko Olga , Lizunov Petro , Polianskyi Anton , Kalashnikov Oleksandr
Published: January 2025

The results of the study of natural vibrations of a coupled shell of revolution are presented. The shell is a spherically biconical structure that has sharp bends in the mid-surface at the junction of different shapes. The material is a unidirectional fibrous carbon/epoxy composite. The shell structure, by its geometric shape and material parameterss, is an approximate model of the fairing of the launch vehicle. The modal analysis of a thin elastic shell is based on the use of a finite element model of a inhomogeneous shell and the application of a universal 3D finite element. The governing finite-element equations are constructed using a moment scheme of finite elements. The universal finite element is based on a standard isoparametric 3D finite element with polylinear shape functions for coordinates and displacements. It is characterized by the presence of additional variable parameters. Two nonclassical hypotheses are used to describe the features of the stress-strain state of a thin inhomogeneous shell. The static hypothesis of the constant of compressive stresses throughout the thickness of the shell layer is used. The kinematic hypothesis of deformed straight line is used, which is not necessarily normal to the mid-surface of the shell. The hypothesis allows us to join three-dimensional finite elements, keeping compatibility of the coordinates and displacements, and naturally modeling sharp bends. This phenomenon is inherent, for example, to folded and coupled (combined) shells. The performed modal analysis of the spherical biconical structure demonstrates the effectiveness of the method. Based on the universality of the approach, the method can be applied in studying the behavior of structures whose shell elements are made of different materials.
The results of a retrospective study to evaluate efficiency of combined use of azilsartan medoxomil + amlodipine vs. perindopril + amlodip- ine in patients with various degrees of hypertension in relation to cardiovascular events (EDARGO-CV)
Authors:   Acad. E.I. Chazov National Medical Research Center of Cardiology, Moscow, Efremova Yu.E. , Kaftanov A.N. ,   LLC "K-Sky", Petrozavodsk, Gavrilov D.V. ,   LLC "K-Sky", Petrozavodsk, Arutyunov G.P. ,   Pirogov Russian National Research Medical University, Moscow
Published: January 2025

Background: arterial hypertension (AH) is a leading modifiable risk factor of cardiovascular diseases. In the Russian Federation, a new Long
and Active Life National Project intended to achieve expected 78-year life time by 2030 will be implemented in 2025-2030. To achieve the goal
in hypertension patients, appropriate blood pressure control is necessary to reduce a risk of cardiovascular complications.
Aim: to study efficiency of combined use of azilsartan medoxomil + amlodipine vs. perindopril + amlodipine in AH patients in real clinical
practice with regard to the risk of cardiovascular events.
Materials and Methods: an observational retrospective study was conducted using data from electronic medical records of AH patients
who were divided into 2 groups depending on a therapy regimen: azilsartan medoxomil + amlodipine (Group 1) or perindopril + amlodipine
(Group 2). The average follow-up duration was 11±13.4 months. A primary composite endpoint (5-major inverse cardiovascular events,
5-MACE) and secondary endpoints were evaluated.
Results: it was shown that a number of adverse events related to the primary composite endpoint (5-MACE) in the Group 2 was higher than
that in the Group 1 (104 [11.8%] vs. 74 [8.4%], respectively [p=0.02]). Incidence of the secondary endpoint-related events did not differ
significantly between the groups. The composite endpoint (5-MACE)-related outcome odds in the Group 1 were 1.4 times lower than those in
the Group 2 (odd ratio: 0.69, 95% CI [0.5—0.94]).
Conclusion: a comparative study of the clinical outcome incidence in hypertension patients, depending on a combined therapy option, was
conducted for the first time in the Russian Federation. As compared to perindopril+amlodipine therapy, azilsartan medoxomil+amlodipine
treatment resulted in a decrease in cardiovascular events and overall mortality, and the relevance of an issue related to the best choice of
a therapy regimen was confirmed. Comparative prospective studies considering current target blood pressure values and antihypertensive
therapy regimens should be conducted.
Keywords: cardiovascular complications, arterial hypertension, antihypertensive therapy, angiotensin receptor blockers, azilsartan
medoxomil.
For citation: Efremova Yu.E., Kaftanov A.N., Gavrilov D.V., Arutyunov G.P. The results of a retrospective study to evaluate efficiency of
combined use of azilsartan medoxomil + amlodipine vs. perindopril + amlodipine in patients with various degrees of hypertension in relation
to cardiovascular events (EDARGO-CV). RMJ. 2024;9:7–14. DOI: 10.32364/2225-2282-2024-9-2
The Uncanny Valley Phenomenon: Where Is the Categorical Boundary Between Categorization Difficulty and Categorization Failure?
Authors: Yamada Yuki , Sasaki Kyoshiro
Published: January 2025

The uncanny valley phenomenon has been widely discussed in relation to human-like entities, but some studies suggest it also applies to inanimate stimuli. Recently, Sasaki et al.[1] used abstract figures as stimuli and argued that categorization failure, rather than difficulty, underlies the uncanny valley phenomenon. While we appreciate their interesting proposal, we clarify that categorization difficulty and failure are not mutually exclusive accounts. We critically examine the findings of Sasaki et al.[1], questioning the lack of direct evidence for categorization failure and their reliance on non-significant results. Furthermore, we propose that the (difficulty-originated) "stranger-avoidance" hypothesis remains a viable alternative, suggesting that categorization difficulty leads to negative responses. Future research should integrate these perspectives to achieve a more comprehensive understanding. Our commentary highlights the need for collaboration and theoretical refinement in uncanny valley research.
Health Transformation Through Prevention Requires Progress Metrics for Value Creation
Authors: Friebe Michael
Published: January 2025

The healthcare system faces significant challenges rooted in its fee-for-service model, which incentivizes interventions for the sick rather than prioritizing preventive measures, predictive health assessments, and early detection.

Resistance to systemic reform results from the complex agendas of stakeholders, including clinicians, hospitals, insurers, policymakers, and technology providers. Patients, the core stakeholders, are rarely involved in shaping their health futures, however.

Transitioning to a prevention-based model demands systemic change, emphasizing early stakeholder engagement, evidence-based solutions, training, and fostering innovation.

Digital transformation and value-based care are essential to overcoming the "healthcare innovator's dilemma,” but they also require new business models, initial funding, and progress/value metrics to be accepted and adopted. The article discusses that while a health delivery transformation and disruption are needed, a business model for prevention will need to be developed and established in parallel.

Investments in preventive technologies promise long-term cost reductions and improved health outcomes; they also require substantial upfront funding, which is unlikely to be provided through private investments without a future business model. To convince individuals and other stakeholders to spend more personal money, the value must be demonstrated and respective metrics developed.

The article will also talk about the value of prevention for lower-income health environments and present opportunities in the context of reverse innovation.
Relaciones sanas. Guía para la prevención de la violencia en las relaciones de pareja joven. Versión PDF
Authors: Lara Laura , Providell Lesliee , Labra Paloma
Published: January 2025

El inicio de las relaciones de pareja conlleva una serie de cuestionamientos sobre qué es lo que se debería esperar en ellas. La verdad es que no hay una sola forma de comportarse en las relaciones, pero sí, a partir del conocimiento científico disponible, se puede orientar en los aspectos que deberían estar presentes y los que no. Por tanto, esta guía surge como una forma de acercar este conocimiento a los y las jóvenes de una manera atractiva y directa, para ayudar a que el establecimiento de estas relaciones se realice de modo que permita su disfrute, evitando situaciones negativas que puedan dar lugar a dinámicas abusivas.
Anything Can be Endured, Except Loneliness, Loneliness is Killing Me...
Authors: Vukušić Ana-Marija
Published: January 2025

The author deals with the problems of isolation and loneliness in rural, sparsely populated parts of Croatia based on the findings of research conducted in the Dalmatian Hinterland. The first part of the article is dedicated to selected theoretical insights on social isolation and loneliness, and then, by presenting the comments of people she met in the field on their own everyday life, the author deals with the diversity or subjective characteristics of the ways in which loneliness and isolation (as well as the related feelings of uselessness, feeling “redundant” and insecurity in existing relationships, to name a few) can manifestthemselves in the lives of the elderly.
Što je otok bez muzeja?
Authors: Blagaić Marina
Published: January 2025

Etnografsko istraživanje provedeno na Šolti, otoku bez muzejske institucije, u razdoblju od 2007. do 2024. godine među različitim generacijama stanovništva ukazalo je, među ostalim, na potrebu za mjestom interpretacije vlastite kulture. Oslanjajući se na muzeološku teoriju koja naglašava ulogu muzeja u osnaživanju, pa čak i formiranju zajednica, u ovome su radu predložena, etnografskim istraživanjem mapirana, identitetski važna razdoblja i elementi šoltanske prošlosti i recentnoga doba, kao ideje za mjesta interpretacije u zamišljenoj baštinskoj ustanovi, te su predstavljene inicijative lokalne zajednice i stručnjaka posvećenih interpretaciji šoltanske kulturne baštine.
Sve se može podnit, samo samoća, samoća me ubi…
Authors: Vukušić Ana-Marija
Published: January 2025

Na primjeru istraživanja provedenog na području Dalmatinske zagore, autorica se u članku bavi problemima izoliranosti i osamljenosti u ruralnim, slabo naseljenim dijelovima Hrvatske. Prvi dio članka posvećen je odabranim teorijskim uvidima o socijalnoj izoliranosti i usamljenosti, da bi se potom, predstavljajući osvrte ljudi koje je susrela na terenu na vlastitu svakodnevicu, autorica pozabavila raznolikošću odnosno subjektivnom obilježenošću načina na koji se usamljenost i izoliranost (ali i njima srodni osjećaji nepotrebnosti, bivanja „viškom“, nesigurnosti u postojeće odnose itd.) mogu manifestirati u životima starih ljudi.
What is an Island Without a Museum?
Authors: Blagaić Marina
Published: January 2025

An ethnographic survey conducted on Šolta, the island without a museum institution, in the period from 2007 to 2024 among different generations of the population indicated, among other things, the need for a place for interpretation of one’s own culture. Drawing on museological theory that emphasizes the role of museums in the empowerment, and even formation, of communities, this paper will propose the identity-important periods and elements of Šolta's past and recent times mapped by ethnographic research as ideas for places of interpretation in an imaginary heritage institution and present the familiar initiatives of the local community and experts dedicated to the interpretation of Šolta's cultural heritage.