bluuebunny/crossref_metadata_2025 huggingface dataset:
On Water Quality of Nagaland, North-eastern India: A Short Review and Statistical Analyses
Authors: I Sema Akito , Chaudhuri Sanjay , Jamir T. Tiakaba , Bhattacharyya Jhimli
Published: January 2025

Water is an integral part for human survival but around 2.1 billion people do not have excess to safe drinking water and 4.5 billion people lack proper sanitation. The human needs and demands have built up the rapid growth of industrialization which alternatively has severely affected the stability of water. In the case of Nagaland, there is a mass knowledge gap on water related problems and its ill effects among locals which have not been identified to this extent. Dimapur district of Nagaland being the fastest developing city of Nagaland has severely affected major sources of water bodies but monitoring and documentation on the water bodies is very scanty. In this article we have presented some articles from neighboring northeastern states of India as Nagaland shares its boundary to these states and have similar geographical features. Then secondary data from research articles of Nagaland was examined to understand the contamination level in the region. Further statistical methods such as descriptive statistics, Correlation, regression, factor analysis was analyzed on the secondary data to give a better understanding on the behavior of water pollutants within the region.
Primitive chemically fueled reaction cascade for dissipative droplets
Authors: Wang Ali , Jannik Bjerrum Morten , Graae Sørensen Preben , Tan Junjun
Published: January 2025

A primitive, chemically fueled phosphonodithiolates reaction cascade was constructed using phosphate-based T3P as the chemical fuel and 4-methoxybenzenethiol as the precursor molecule. This reaction cascade functions as a primitive metabolism network, utilizing higher-energy phosphate-based fuel and phosphonodithiolates formation to drive molecular assembly. The resulting assembly is energy-dissipative and transient. This primitive reaction cascade also implies a possible pathway for phosphor entry into the primitive metabolic networks.
"Advanced Computational Insights into Ni(II) Schiff Base Complexes: Addressing Sluggish Kinetics and Stability Challenges in Oxygen Reduction Reaction Catalysis"
Authors: Chukwu Chidi Daniel
Published: January 2025

The development of efficient and stable catalysts for the oxygen reduction reaction (ORR) remains a critical challenge in the pursuit of next-generation energy technologies. In this study, we designed and investigated a Ni (II) Schiff base complex as a potential solution to address the sluggish kinetics and stability limitations of ORR catalysts. A comprehensive computational approach was adopted, integrating ChemDraw for molecular modeling, DMol3 in Material Studio for electronic structure and catalytic property calculations, and MATLAB for precise overpotential analysis. The Ni (II) complex demonstrated a significantly lower overpotential (−0.55) compared to its Co(II) counterpart (−4.95), highlighting its superior catalytic efficiency and faster reaction kinetics. The Schiff base ligand, with its robust chelating ability and electronic tunability, facilitated the stabilization of intermediates and optimized the electronic properties of the Ni (II) center, enabling efficient electron transfer and intermediate transitions. Gibbs free energy calculations revealed a pathway with hydroperoxide (HO2−) as the first intermediate, further validating the thermodynamic feasibility and kinetic superiority of the Ni (II) complex. These findings underscore the Schiff base ligand as an ideal framework for designing high-performance catalysts and demonstrate the potential of the Ni (II) complex for ORR applications in fuel cells and metal-air batteries. This study provides valuable insights into leveraging computational tools for catalyst design and emphasizes the need for further exploration of Schiff base ligands in energy catalysis to address global energy demands.
Primitive thioesterification/hydrolysis reaction cycles for dissipative assemblies
Authors: Wang Ali , Jannik Bjerrum Morten , Graae Sørensen Preben , Tan Junjun
Published: January 2025

In recent years, chemically fueled assemblies which are constructed by using activation/deactivation reaction cycles have attracted more and more attention. These non-equilibrium assemblies show many interesting dynamic behaviors such as staying away from equilibrium and dissipating energy. Constructing diverse non-equilibrium assemblies could be a powerful tool to understand the basic chemical principles of life. However, the range of organic chemical reactions available for constructing diverse dissipative assemblies remains limited. Here we constructed a new primitive thioesterification/hydrolysis reaction cycle fueled by propylphosphonic anhydride (T3P) in aqueous solution by using a series of N-protected amino acids as the precursor molecules. The effect of concentration, pH and precursor structures to the reaction cycles are thoroughly investigated. We further found this reaction cycles can also drive transient and non-equilibrium molecular assemblies if appropriately designed precursor molecules are used. This reaction cycle presents a primitive metabolism-like reaction network to regulate molecular organization.
Study for Identification and Classification of Advanced Manufacturing Technology Implementation Drivers in Small and Medium Enterprises
Authors: Bhise D. V. , Kumbhalkar M. A. , Sardeshmukh M. M. , Choudhari S. A. , Sarje S. H. , Kardekar N. B.
Published: January 2025

Purpose: The primary objective of this study is to assess the factors that have the most significant impact on SMEs' adoption rate of Advanced Manufacturing Technologies (AMT).
Design/Methodology/Approach: An interpretive structural modelling (ISM) approach was applied to assess drivers for AMT adoption. Data was gathered from literature and supplemented by expert opinions from academics and professionals. The identified drivers were ranked and classified through the ISM framework, and their reliability and influence were examined using the Matrice d'impacts croisés multiplication appliquée á un classment (MICMAC) analysis.
Findings: The ISM analysis revealed that government policy support and customer/buyer pressure are primary drivers for AMT adoption in SMEs. These drivers form the foundational factors influencing the successful implementation of AMTs and enabling SMEs to develop strategic, priority-based business plans.
Research Limitation: The study is limited to SME environments, which may restrict its applicability to larger firms.
Practical Implication: Emphasising government support and responding to buyer pressure can guide SMEs in integrating AMTs more effectively.
Social Implication: Successful AMT implementation in SMEs can promote job creation, local economic growth, and sustainable manufacturing practices, benefiting society by enhancing regional competitiveness and innovation.
Originality/Value: This study provides a structured framework for understanding AMT adoption drivers in SMEs, incorporating ISM and MICMAC analyses to bridge a gap in the literature.
Lifestyle Differences Between Rural and Urban Communities In Hypertension Prevention
Authors: Baidhowy Arief Shofyan , Maftuhah Wahyu Haniq , Armiyati Yunie , Soesanto Edy
Published: January 2025

Indonesian society is undergoing an epidemiological transformation as the burden of disease shifts from infectious diseases to non-communicable diseases. Hypertension has become a global problem and is one of the non-communicable diseases that requires special attention. The management of risk factors for hypertension is lifestyle. Rural and urban play an important role in lifestyle changes so that people in both places are at risk of hypertension. So it is necessary to see the differences in the lifestyles of urban and rural communities to prevent hypertension. The purpose of this study was to determine the differences in lifestyle that occur in urban and rural communities in preventing hypertension. This research is a type of descriptive analytic with a cross-sectional design. The sample in this study were 150 respondents selected by stratified random sampling technique. The results of this study show there is a significant relationship between lifestyle in rural and urban communities. Rural and urban lifestyles affect the prevention of patients with hypertension.
Review of Reliability of Solar Hybrid Generator System as Temporary Power Supply for Offshore Industry for Sustainable Platform Application of Environmentally Friendly Energy Sources
Authors: Alamsyah Haryani , Ardiansyah  , Sunardi
Published: January 2025

This paper discusses the application of two combined power generation systems namely generator and Solar Panel in improving the efficiency of offshore power supply during downtime. Ensuring reliable and sustainable power in remote and limited range environments is critical for sustainable platform maintenance and sustainability. Traditional power sources, such as diesel generators, although reliable, have high carbon emissions and operational costs. Solar energy, although environmentally friendly, faces spatial constraints in offshore. A hybrid system combines photovoltaic (PV) panels and conventional generators, which provides an optimal balance between renewable energy and reliability. This study focuses on the system design, operational benefits, and its impact on wellhead platform sustainability, highlighting its efficiency and environmental sustainability.
Treating time as space in Polish: Metaphors and metaphorical expressions
Authors: Kapitańska Martyna
Published: January 2025

Situating itself within the long-standing tradition of conceptual metaphor studies, the present paper seeks to analyze the means through which Polish exhibits linguistic manifestations of the conceptual metaphor TIME IS SPACE. From the Polish National Corpus, selected metaphorical expressions are retrieved and analyzed, taking into consideration their frequency, collocative environment and semantic scope. The results indicate that the metaphorical variations of TIME IS SPACE in Polish align with the variations in spatial conceptualization and employ similar linguistic tools, such as prepositions and cases. The level of productivity and conventionalization of the metaphor in question speaks to its prominent role within the Polish conceptual system.
Terry Pratchett’s Discworld witches as liminal beings
Authors: Karaś Kamil
Published: January 2025

This article presents the characters of witches in the Discworld series by Terry Pratchett. Witches are a part of the Western civilisation and are popularly connected with evil and harm they can cause to people. In this article I argue that Terry Pratchett depicts witches as liminal beings in his Discworld series. I also identify the most important qualities of these literary characters.
Investigation of polymorphisms in genes related to dairy productivity in Russian sheep breeds
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Abdelmanova a.S.
Published: January 2025

The article presents the results of an analysis of the frequencies of alternative alleles in SNPs associated with milk production. 12 breeds of sheep belonging to different productivity types were studied. The identified trends in the distribution of allele frequencies in Russian breeds in the LEP, STX18 and PRL genes indicate that the Karakul, Karachaev, Lezgin and Ossetian breeds are potentially more preferable for milk production compared to other studied groups.
The state of goat breeding in the world and ways to increase dairy production of goats (review)
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, KARPOVA E.D.
Published: January 2025

Goat breeding is an important area of animal husbandry, and is of great importance for food security and economic development in many countries. The main attention is paid to the dairy productivity of goats, as goat’s milk is becoming increasingly popular on the world market due to its nutritional properties. This work is aimed at analyzing the situation of the level of modern development of the economic and social significance of goat breeding in the world and the Russian Federation.
Wool productivity and blood biochemistry of purebred and crossbred of the Romanov sheep
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Dvalishvili  V.G.
Published: January 2025

The article presents the material on the study of wool productivity, wool quality and blood biochemistry in purebred and crossbred young Romanovs. It was found that the yield of dirty wool from the counting sites of crossbred rams was 1.99 g or 47.8% more compared to purebred ones, for washed wool the difference was 1.55 g or 43.2% in favor of crossbreds. At the same time, the yield of washed wool was higher in purebred rams and amounted to 86.45%. Crossbred animals had stronger wool and amounted to 10,12 sN/Tekx or 23.3% stronger compared to purebred rams. No significant differences were found between the groups in terms of blood biochemistry.
Influence of different levels of selenium in the diets of feeding young sheep on productivity and metabolism
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Jamaludinov N.M.
Published: January 2025

The results of studying wool productivity and wool quality, as well as the hematological status of 9-monthold Dagestan mountain rams with different levels of selenium in the diets are shown. The addition of organic selenium (DAFS-25) in the amount of 12 mg/head contributed to an increase in the shear of clean wool in animals by 0.31 kg or 22.8%, fineness and strength of wool fibers. In the blood of rams, the number of erythrocytes, total protein and glucose increased, and the amount of urea decreased.
The effect of compound feeds enriched with “protected” carbamide on the milk quality of North Caucasian sheep
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, MARYNICH A.P.
Published: January 2025

The study of the effect of protected carbamide in sheep nutrition is an urgent area of research in the field of animal husbandry. The article presents the materials of a scientific experiment aimed at developing norms for feeding “protected” urea as part of compound feeds for sheep of the meat and wool production line during lactation. Studies have established that the inclusion of compound feeds enriched with “protected” carbamide in the diets of lactating sheep contributed to an increase in economically useful signs and had a positive effect on the qualitative and quantitative indicators of milk. It was revealed that the amount of fat in the milk of animals of the experimental groups increased by 0.04 and 0.14 abs.%, protein - 0.02 and 0.05 abs.%, lactose - 0.04 and 0.11 abs.%. The caloric content of 100 g of milk increased by 0.65 and 1.91 Kcal, respectively. Intensive growth of lambs was recorded during the suckling period, due to high indicators of milk productivity and milk quality in sheep of experimental groups.
Оrganoleptic and physical-chemical indicators of milk of saanen breed goats with mulleriosis
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Tsepilova I.I.
Published: January 2025

The quality of goat milk depends on various factors. When goats were infected with mulleriosis (EI = 62,8%), it was found that after deworming with fenbendazole containing a drug, no deviations in organoleptic indicators were detected, a significant increase in the mass fraction of fat by 12,2%, a mass fraction of protein by 69,2% and a decrease density by 1,6% compared to the control group.
Narrative Models of Representation of Family Memory in the Short Prose by I. Stefiuk (About You) and L.-P. Strynadiuk (How will I Live on Polonyna (Pasture))
Authors: Reznichenko Yuliia
Published: January 2025

Significance of the proposed research lies in typologically similar representation of autobiography focused on family memories in works by I. Stefiuk and L.-P. Strynadiuk. The aim of the article is to identify and characterise narrative models of expressing family memories in the short prose by I. Stefiuk (collection ‘About You’) and L.-P. Strynadiuk (collection ‘How will I Live on Polonyna (pasture)’). Subjects of investigation are selected short stories from the aforementioned collections. Methods of the research: narratological analysis, comparative method, and receptive aesthetics. As a result of our investigation, we came to conclusion that retrospective narrative models with linear and non-linear chronological organization facilitate fiction representation of family memory in short prose by I. Stefiuk and L.-P. Strynadiuk. Non-linear narrative models are significantly wider represented and organised in several samples: childhood memory — actualization of the present and/or projection into the future (‘Taste of Jonathan’, ‘Green Wax’, ‘Mytro’s Camomiles’ etc. by I. Stefiuk); fusion of different time layers (‘Near the Well’, ‘Birth of a Woman’, ‘Summer in a Bowl’ et al. by I. Stefiuk); projection into the future — actualization of the past and/or present (‘Wurda’, ‘Thunder and Lightning’ by L.-P. Strynadiuk), etc. In such a story made by the means of voice of ‘I’ — narrator, inextricability of the link between chronotope of childhood, language (Hutsul dialect), national traditions is represented. Intimacy of a dialogue with reader is provided due to self-irony, nostalgic mood of the narration where we notice gratitude to family (grandmother, grandfather, mother — in texts by I. Stefiuk) and the focus is on the feeling of their constant presence. Linear narrative model, organized in the present time of the story, is presented in the essay ‘Polonyna (pasture) — is me’ by L.-P. Strynadiuk. We are convinced that this investigation can be continued, particularly in the aspect of comparing fiction worlds represented in the text by I. Stefiuk and L.-P. Strynadiuk.
The Writer and the Times
Authors: Vaskiv Mykola
Published: January 2025

Review: The Personal Case of Ivan Chendey No. 18257. Volume I. The story of the novel "Birds Leave Their Nests..." / author of the project idea, compiler, introductory article and scientific editor, commentary, selection of illustrative material, preparation of appendices by DSc (Philol.), Prof. S. Kiral; preparation of case documents and separate commentaries by Csc (Philol.) V. Podryga. Kyiv ; Uzhgorod: RIK-U LLC, 2024. Vol. I. 736 p.
List of (Un) Recommended Reading: Ukrainians in the works of Russian writers of the 20th century
Authors: Halchuk Oksana
Published: January 2025

The article aims to study the portrayal of Ukrainians in the literature from the Soviet period. It focuses on how Ukrainian identity is represented based on ethno-clichés rooted in the Russian imperial tradition, which persisted across different periods of the twentieth century. The works analyzed include “The Silent Don” by Sholokhov, “The White Guard” by Bulgakov, and “To the Independence of Ukraine” by Brodsky. These works share a deliberate and systematic construction of Ukrainians as “Other” and “Alien”.
The study uses a diachronic approach and comparative historical, descriptive-analytical, imagological, and contextual analysis principles. These methods are employed to examine the selected works and determine how the images of Ukrainians are constructed in the texts of writers within the Russian imperial discourse.
The study discovered that the portrayal of Ukrainians, and Ukraine in general, in the analyzed literature was based on ethno-clichés rooted in the tradition of Russian imperial thinking. As a result, these portrayals reflect the authors’ subjectivity and imperial worldview, and political engagement, regardless of the variations in their personal backgrounds. The depictions of Ukrainians in the works of Sholokhov, Bulgakov, and Brodsky are influenced by Russians’ “cultural” codes, where the determining factor in their creation was not empirical reality but a discursive tradition based on stereotypes and prejudices.
It’s concluded that contrary to the slogans of friendship and equality of all peoples declared in Soviet ideology, Sholokhov’s “The Silent Don” depicts the image of Ukrainians as the Other (khokhly). In contrast, Bulgakov’s “The White Guard” is dominated by the image of the Alien/Enemy, represented by the petliurivets (a historical counterpart of the mazepynets). Whereas ‘dissident’ Brodsky presents in his pasquil To the Independence of Ukraine a combination of various ethno-clichés related to Ukrainians and Ukraine, encompassing everyday (khokhol), cultural (maloros) and political (mazepynets) contexts.
The inclusion of the analyzed works in the literary canon of modern Russia and, most importantly, their reception by foreign readers as part of the myth of ‘great Russian literature’ and components of the propaganda text determines if they are mandatory positions in the list of recommended texts for decoding and debunking as examples of imperial literary discourse.
STAGES OF EFFECTIVE RECRUITMENT OF STAFF AT FITNESS CLUBS TAKING INTO ACCOUNT THE FEATURES OF THEIR PROFESSIONAL ACTIVITY
Authors: Biriuchynska Svitlana
Published: January 2025

Introduction. The article examines the specifics of personnel activities in a fitness club. The
difference in positions and duties for the fitness club staff is shown. The results of the
activity of many fitness clubs and the accumulated experience of their work with personnel
show that the formation of teams, ensuring the high quality of personnel potential are
decisive factors for the efficiency of work and the competitiveness of the organization. The
peculiarities of various aspects of the selection and motivation of the fitness club staff are
analyzed. The main stages of selection and evaluation of personnel in fitness clubs during
recruitment have been determined.
The aim of the study is to determine the main stages of personnel selection in fitness clubs, taking
into account the peculiarities of their professional activity.
Material and methods: analysis; synthesis; comparison.
Results. In the course of the study, the stages of preparation for the hiring process were determined
- this is the determination of the necessary positions based on the needs of the fitness club
and the creation of job instructions. After defining positions, a «Job Portrait» (job
description, job profile, or Job Description) is formed, which is a tool for effective
management of organizational processes and ensuring optimal employee productivity.
Having a documented job description can be helpful in resolving conflicts or issues related
to labor relations. Job descriptions define the duties, tasks and qualifications required for
each position. This helps potential candidates understand what is expected of them and
ensures that the recruitment process involves people with the right skills and qualifications.
The process of selecting personnel for a fitness club is determined, which consists of initial
selection, an interview with the personnel service, gathering information about candidates,
an interview with the head of the unit, testing, and selecting a candidate. It is important to
promote the unique aspects of working at a fitness club, such as the opportunity to work in a dynamic, health-oriented environment. Fitness clubs must establish specific criteria for
selecting candidates based on job requirements and desired qualifications, which can be
done using specialized computer-based tests, oral and written tests. By conducting
thorough interviews and assessments, fitness clubs can make informed decisions and select
the most suitable candidates for their organization. It is shown that the stage of
implementation and training of new personnel involves familiarizing new employees with
the mission, values, policies and procedures of the fitness club..
Conclusions. In the modern conditions of the development of the fitness industry, special
importance goes to issues of personnel policy, problems of training, retraining and
upgrading the qualifications of personnel of all categories in fitness clubs.
CHALLENGES AND IMPACTS OF COVID-19 ON HOSPITAL WORKERS IN INDIA: A COMPREHENSIVE STUDY ON SOCIAL LIFE, WORKFLOW PERCEPTION, AND PSYCHOLOGICAL HEALTH
Authors: Sigroha Anju , Soniya
Published: January 2025

A cross-sectional study was conducted to identify challenges, social impacts, perceptions level, and psychological risk factors experienced by hospital workers in India during COVID -19. A pre-designed online questionnaire was shared among hospital workers to take their responses. We had collected the responses of 177 respondents. The study found that 94.9% of hospital workers in India observed staff shortages, low patient capacity, and insufficient protective equipment during COVID-19. Resource mismanagement and inadequate financial systems exacerbated these challenges, impacting patient care and hospital efficiency. Hospital workers experienced significant disruptions in their social lives, strained relationships, and fear of contamination among family and friends. Employment in the healthcare sector declined, and perceptions of daily workflow worsened, highlighting the need for advanced technology. Additionally, hospital workers faced poor psychological health, including disrupted sleep, anxiety, depression, and fear of stigmatization.
THE ROLE OF MICROFINANCE IN WOMEN’S EMPOWERMENT IN THE HIMALAYAN REGION
Authors: Bhatt Tiwari Nisha , Bisht Prof. Padam S. , Singh Prakash
Published: January 2025

This study explores the role of microfinance in promoting women’s empowerment in the Himalayan region of Nepal, with a specific focus on women’s economic independence. Microfinance programs, which provide small loans, savings opportunities, and financial literacy training, have been identified as crucial tools for empowering women in rural areas. This research uses a descriptive approach to analyse the experiences of 80 women engaged in microfinance activities. Data was collected through a structured questionnaire covering personal demographics, business ownership, loan utilization, training received, savings behaviour, income generation, and empowerment indicators. Advanced analytical techniques, including Principal Component Analysis (PCA), K-means clustering, Multivariate Analysis of Variance (MANOVA), Regression Analysis, and Structural Equation Modelling (SEM), were employed to examine the relationships between microfinance factors and empowerment outcomes. The results indicate that business ownership, loan utilization, and training are significantly associated with enhanced decision-making, confidence, and self-esteem among the respondents. PCA revealed that empowerment is driven by a combination of financial autonomy, education, and social support. K-means clustering identified three distinct groups of women based on their empowerment levels, while MANOVA confirmed that microfinance participation significantly impacts empowerment. Regression analysis highlighted business ownership and training as the strongest predictors of women’s empowerment, with income generation acting as an important mediator. The SEM model further emphasized the importance of income and business ownership in driving empowerment, both directly and indirectly. This study underscores the importance of integrating microfinance services with comprehensive capacity-building programs to maximize women’s empowerment in the region. It also offers valuable insights for policymakers and microfinance institutions looking to enhance the effectiveness of their interventions aimed at empowering women.
Current practice of accounting pressure–temperature conditions in porosity evaluation
Authors: Gubinsky D.N. , Zarai Е.А. , Kudymov А.Yu.
Published: January 2025

Background. The problem of taking into account pressure–temperature conditions in estimating the porosity coefficient is raised. Objective. To emphasize the relevance of the problem and demonstrate the authors’ experience using the example of materials from terrigenous deposits. Materials and methods. A modern methodological approach to calculating effective isostatic pressure using core data, the results of geophysical studies of wells and testing of formations on a cable is considered. Results. The results of petrophysical modeling are presented, comparing the obtained conversion coefficients from atmospheric conditions to pressure–temperature conditions for the porosity coefficient, as well as reference values of the conversion coefficients based on the authors’ experience. Conclusions. The importance of interaction and simultaneous work of the specialists in different areas for effective planning of laboratory core research programs is noted.
Well test analysis of a low-thickness Cenomanian gas reservoir with permeable shale layer
Authors: Abramov T.A. , Akkerman A.Sh. , Aleksandrov A.A. , Abzgildin R.R. , Luzan L.A.
Published: January 2025

Background. Effective oil and gas field development requires understanding of the drainage of the reservoir both by area and by vertical direction. This task is especially relevant for low-thickness objects underlain by bottom water, such as the gas-saturated reservoir of the Pokur suite (PK-1 formation) considered in this work. Objective. To identify the permeability of the siltstone thin layer separating the PK1-1 and PK1-2 cyclites. Materials and methods. The article uses well testing methods: analysis and interpretation of the actual data of the pressure build-up curve registration and interference testing and their comparison with the results of numerical and analytical modeling performed in the Saphir module of the Kappa Workstation software. Results. Pressure build-up behavior was identified, allowing to establish the drainage through a low-permeability layer of an untapped productive layer. We found that the drainage covers the entire productive interval in a fairly short period of time: within 1 hour for a vertical well and 10 hours for a horizontal one. These estimations are proved by the data of interference testing. Conclusions. The permeable nature of the siltstone thin layer was established, through which the whole productive interval is drained during well production. The obtained results are necessary for reserve recovery and water influx dynamics estimation and calculation of well operation parameters.
Development of a new algorithm for the neutral trigger of the CMD-3
Authors: Shoukavy D. V. , Harkusha S. N. , Gorkovenko A. O. , Grigoriev D. N.
Published: January 2025

In order to improve the energy and coordinate resolution of the neutral trigger of the СMD-3 detector, it is proposed to use a clustering algorithm based on overlapping “windows” of trigger cells. The window of 2 × 2 crystals is considered to be a single trigger cell, and its signal amplitude value is sent for processing by the trigger system. Based on MonteCarlo simulation, the optimal number of trigger cells to assign to the cluster for energy reconstruction of particles hitting the calorimeter in real time was determined.
Influence of annealing on the structural-phase state and physical-mechanical properties of vacuum-arc TiN coatings applied to 90CrSi steel
Authors: Kukareko V. A. , Kushnerou A. V. , Popok N. N.
Published: January 2025

The effect of annealing at 350–500 °C on the structural-phase state, nanohardness, elastic modulus and critical peel load Lc of vacuum-arc TiN coatings deposited on a substrate made of pre-annealed 90CrSi steel was investigated. It has been established that the coating contains TiN and Ti phases. The nanohardness of the coating is 29 GPa, and the elastic modulus is 485 GPa. It was concluded that the increased values of the nanohardness and coating elastic modulus are associated with the presence of a large number of crystal lattice defects in it. It is shown that as the annealing temperature of the coating increases from 350 to 500 °C, the values of the nanohardness and elastic modulus of TiN coatings decrease, while an increase in the crystal lattice parameter, as well as a decrease in the dislocation density and TiN dispersion are recorded. An increase in the crystal lattice parameter of TiN during annealing of the coating is associated with the formation of vacancy complexes in it. It was found that as a result of annealing TiN coatings, the peeling load increases from 12.8 to 21.1 N. It was concluded that the increase in the peeling load of the coating during annealing is associated with the formation of an oxide film, which prevents the nucleation (generation) of dislocations during the introduction and movement of the indenter in the coating and, thus, slows down the formation of microcracks at the boundary of the coating and the substrate.
Lengths of the intervals where integer polynomials can attain small values
Authors: Bernik V. I. , Vasilyev D. V. , Kudin A. S. , Panteleeva Zh. I.
Published: January 2025

The concept of the discriminant of a quadratic polynomial allows for easy extraction of information about its real and complex roots. The discriminant of a polynomial of an arbitrary degree is also an important characteristic of the polynomial, which proves useful in many problems in the theory of Diophantine approximation. In 2023, Belarusian mathematician D. Badziahin solved a problem posed by Davenport in the 1960s concerning the range of values of discriminants in the cubic case. The paper provides a complete solution to the problem of divisibility of discriminants by large powers of prime numbers in the case of cubic polynomials.
Polymorphic variants of the ARMS2 (rs10490924) and CFH (rs1061170) genes as susceptibility markers to neovascular age-related macular degeneration in the Belarusian population
Authors: Shymanovich U. A. , Gudievskaya I. G. , Ryabokon N. I. , Yatskiu H. A. , Tserashenka V. V. , Dalidovich A. A. , Marchenka L. N. , Kilchevsky A. V.
Published: January 2025

The significance of the polymorphic variants rs10490924 (A69S) of the age-related maculopathy susceptibility 2 gene (ARMS2) and rs1061170 (Y402H) of the complement factor H gene (CFH) for risk assessment of neovascular agerelated macular degeneration (nAMD) in the Belarusian population was studied. It was established that by minor alleles hetero- and homozygotes are associated with a high risk of nAMD. It was shown that the risk of disease development increases many times with each minor allele copy (the log-additive inheritance model) both for rs10490924 and rs1061170. The ARMS2 rs10490924 polymorphism has the greatest risk significance. At the same time, the analysis of paired genotype combinations by the loci studied is more informative for risk assessment than for individual loci. The results obtained can be used to assess a genetic predisposition to nAMD in the Belarusian population.
Usage of mesenchymal cells from the human placental-umbilical complex in the correction of liver failure in patients with decompensated liver cirrhosis
Authors: Yurkina E. G. , Efimov D. Yu. , Krivenko S. I. , Primakova E. A. , Nazarova E. A. , Symanovich A. A. , Dedyulya N. I. , Smolnikova V. V. , Yanushevskaya E. A. , Romanova I. A. , Sazanovets V. V. , Sadovskiy D. N. , Shturich I. P. , Korotkov S. V. , Shcherba A. E. , Rummo O. O.
Published: January 2025

Acute-on-chronic liver failure is an acute liver decompensation in cirrhotic patients, which leads to organ failures and high short-term mortality. The treatment is based on the management of complications and, in severe cases, liver transplantation. Liver transplantation is the most effective treatment, but the lack of donor livers and a high cost of transplantation limit its broad application. Human placenta-umbilical cord complex derived mesenchymal stem cells (MSCs) can be considered as an allogeneic source for liver disease. The aim of the study was to assess the safety and potential effectiveness of systemic administration of mesenchymal cells from the human placental-umbilical cord complex for liver failure correction in patients with decompensated cirrhosis of the liver. An open interventional prospective case-control study was conducted, including 40 patients over 18 years of age with decompensated liver cirrhosis who were hospitalized awaiting liver transplantation. Laboratory efficacy of therapy was confirmed by a significant decrease in a total bilirubin level by 39 %, an increase in total protein was noted (by 11 %), as well as stabilization of coagulopathy (decrease in INR by 25 %). Systemic administration of mesenchymal cells of placental origin is a promising therapeutic option for patients with decompensated liver cirrhosis, allowing one to increase the waiting period for emergency liver transplantation and stabilize the clinical course of the disease.
Structure of the product design and assessment of its complexity level from the point of labor intensity of manufacturing and operational efficiency
Authors: Bazrov B. M. , Kheifetz M. L. , Hurevich V. L.
Published: January 2025

Based on the fact that the complexity of the product design affects the labor intensity of its manufacture and the efficiency of operation, the concept of product complexity is formulated by determining the number of levels of the design structure. It is proposed to describe the structure of the product design using a graph reflecting the connections between the elements of the product design, and to show their subordination using the design bases of each element and describe the number of levels and the number of elements at each level of the graph. It is shown that the structure of the design affects the construction of the route of the assembly technological process of the product. In this regard, it is proposed to supplement the initial data for designing the assembly technological process with a graph indicating the connection modules on its edges. This allows, in the presence of an element base of the means of technological support for the connection modules, determination of the expected labor intensity of the product assembly.
Increasing the reliability of high-temperature electric heaters of the radiant tube type based on graph theory methods
Authors: Grinchuk P S. , Luzin V. G.
Published: January 2025

The analysis of the operating features of closed-type electric heaters of the radiant tube type is performed. Based on the operating experience of the radiant tubes manufactured by “PromTermoSistema” LLC (Belarus), the key aspects affecting the durability of the heaters are shown. One of the main technical problems is the dense arrangement of heating elements (metal rods) in a small volume and the associated electrical breakdowns of electrically insulating ceramic inserts. Based on graph theory, a method is proposed for analyzing the commutation of heating elements with dense packing, which made it possible to find new rational commutation schemes. The method is based on constructing numbered graphs on the holes for heating rods in the ceramic element and finding the graph with the minimum weight. According to the meaning of constructing a graph, its weight is proportional to the maximum potential difference between the rods. The found commutation schemes reduce the maximum potential difference on ceramic insulators by 35–50 %, from 70 V to 35÷45 V, and the electric field strength from 10 kV/m to 5.0÷6.5 kV/m. This allows proportionally increasing the reliability and durability of heaters, reducing the probability of electrical breakdowns of ceramics.
The device-process simulation of p–n+ junction in rectangular and cylindrical coordinate systems
Authors: Lagunovich N. L.
Published: January 2025

The silicon p–n+ junction device-process modeling in both rectangular (Cartesian) and cylindrical coordinate systems was executed. In this semiconductor structure the p-region is the base and the n+-region performs the function of an emitter in an n–p–n-type bipolar transistor. The structure of the p–n+ junction explored in this work was obtained in accordance with the manufacturing process by two-dimensional modeling using the TSuprem4 program, which is part of the Synopsys software package. The process simulation allowed  determination of constructive-technological parameters of investigated p–n+ junction structure, which made it possible to carry out its device modeling in cylindrical and Cartesian coordinate systems using the Medici program, which is also part of the Synopsys software package. Direct and reverse branches of the p–n+ junction current-voltage characteristic were computed for modeling cases in these types of coordinate systems and, accordingly, a number of the junction structure electrophysical parameters were determined as a result of calculations performed by Medici. By comparing the data obtained by the method of device-process modeling it was found that the considered structure can be calculated in both types of coordinate systems with a high degree of accuracy, since the dispersion  of constructive-technological parameters defined by technological modeling in different coordinate systems was 2.6–7.4 %, and the dispersion of electrophysical parameters calculated by in device simulation was 0.09–8.64 %. The obtained research results were applied in the design of new electronic products based on one or more p–n junctions, in the development and optimization of its making process flows.
Digitalization of land management in the agroindustrial complex: institutional aspect
Authors: Pavlovich L. , Gorbatovskaya O. , Takun S.
Published: January 2025

The key components of the institutional environment for digital development of land management in agricultural organizations of the Republic of Belarus (subjects, object, regulatory framework, directions, interaction models) are identified, their features are studied, and the main directions for the development of institutional conditions for the process under study are highlighted.
Assessment of the social importance and market potential of new types of meat products for nutrition of preschool and school-age children with an elevated body mass index in the Republic of Belarus
Authors: Dovnar L. , Gordynets S.
Published: January 2025

The results of research of the market potential of new types of meat products for the nutrition of preschool and school children with an elevated body mass index are presented. The social importance of the introduction of these products in the diet of children studying at educational institutions is reflected. The estimation of potential demand volume of the internal market in new meat products of reduced caloric content developed at Institute of Meat and Dairy Industry is carried out. The complex of measures to stimu late the production and consumption of these products in the Republic of Belarus has been substantiated.
Simulation and fabrication of surface-modified glass coverslips to enhance energy harvesting on indoor MOS solar cells
Authors: Louzada Gabriel Oliveira , Izumi Fábio , N. Watanabe Marcos , G. dos Santos Filho Sebastião
Published: January 2025

In this work, analytical and numerical simulations of the reflectance of glass coverslips with different rough-layer thickness carried out to establish the conditions of use as low reflectance intensifier plates for energy harvesting on indoor solar cells. Reflectance simulations as a function of the wavelength were obtained for surface-modified glass coverslips over silicon (air/surface rough layer/glass/silicon) based on the refractive in-dices of the three regions over silicon with negligible extinction coefficients and, for silicon, with a very low value (k = 0.019). The rough layer was modeled with different thicknesses in the range of 50 to 300 nm and with an intermediate refractive index between air and glass (n = 1.25). The thickness of the glass coverslips was varied in the range of 45 μm to 160 μm with a typical bulk refractive index of 1.50. As a result, glass coverslips have been found to enhance the conversion efficiency (η) of light energy into electrical energy for solar cells with surface reflectance higher than that of glass coverslips for indoor energy harvesting applications. The best results of glass coverslips as intensifier plates were obtained for the lowest surface average reflectance in the wavelength range of 300 to 1100 nm. The one-dimensional numerical simulation using COMSOL was very close to the analytical modeling of the air/surface rough layer/glass/silicon structure. An experimental improvement of the conversion yield was observed for any glass coverslips placed on indoor MOS solar cells. Current density x voltage curves (JxV), using indoor light illumination of 11.7 mW/cm2 at 25oC on the sample surface, were extracted for different thicknesses of the processed glass coverslips and the main electrical parameters were obtained for the MOS photovoltaic cells such as the short circuit current (Jsc), the open circuit voltage (Voc) and energy conversion efficiency (η). As a result, a significant increase of the indoor energy conversion efficiency was obtained for the thickness of the glass coverslip of 81.7 μm compared to those without chemical thinning (~130 μm thick), this is to say, η ≈ 5.15% against η ≈ 3.36%, respectively, which was explained by a decrease of surface reflectance of the glass coverslips in accordance with the simulation results of the rough layers.
Fast and Accurate Temperature-Dependent DC Model for GaN HEMT Devices
Authors: Er-rafii Hicham , Galadi Abdelghafour
Published: January 2025

In last years, Gallium Nitride (GaN) high-electron-mobility-transistor (HEMT) has emerged as an at-tractive solution to reduce considerably power losses in tran-sistor switch used in power electronics. In this paper, we pre-sent a simple and accurate temperature-dependent static ana-lytical model for the GaN HEMT, suitable for circuit simula-tor. The proposed model is based on the alpha-power law MOSFET model which was introduced to improve the first-level MOSFET models. In this work, temperature dependence of the model is obtained by its temperature scaling parame-ters. On the one hand, the model takes into account the peculi-ar features observed in transfer characteristic of GaN HEMT at different temperatures: a) the rapid increase of drain cur-rent versus gate voltage at low gate voltage, b) the quasi-saturation effect, which occurs at high gate voltage by the limi-tation of drain current increase versus gate voltage. On the other hand, the model is compatible with high voltage GaN HEMT which shows a gradual increase of the drain current in its output characteristics contrarily to low voltage GaN HEMT. The model parameters are extracted by using an op-timizer algorithm in order to fit model to experimental data in all operating regions of device. Good initial guess values of pa-rameters, extracted from experimental data, are used to lead rapid convergence of the optimizer algorithm. The reduced number of model equations and parameters allows a fast simulation and an easier implementation of the model in cir-cuit simulator. Finally, the accuracy of the proposed model is demonstrated by comparing model to datasheet and experi-mental data of GaN HEMT static I-V characteristics.
SPSPT Switch Based AlN/GaN/AlGaN HEMT on Ku to Ku to V-Band for Satellite Application
Authors: Sidi Mohammed Hadj Irid , Khaouani Mohammed , Four Imane , KOURDI Zakarya , Azzoug Omar
Published: January 2025

This paper details the design, fabrication, and characterization of a single-pole-single-throw (SPST) switch leveraging Aluminum Nitride/Gallium Nitride/Aluminum Gallium Nitride High Electron Mobility Transistor (AlN/GaN/AlGaN HEMT) technology specifically tailored for Ku to V-band satellite applications. The switch targets high-frequency operation within the 40 GHz to 75 GHz range to satisfy the demanding specifications of satellite communication systems. The design integrates AlN, GaN, and AlGaN layers to capitalize on the superior electrical properties of GaN-based transistors while guaranteeing robust isolation and performance enhancement through AlN and AlGaN integration. Design optimization focuses on achieving high isolation, minimal insertion loss and fast switching speeds - all primordial parameters for satellite communication links. Characterization simulations explore improvements in key metrics such as insertion loss, isolation, and switching time at V-band frequencies. In addition, the switch's performance is evaluated under varying temperature and radiation conditions to ensure reliability and suitability for space environments. Early findings suggest favorable performance attributes, hinting at the potential of the proposed SPSPT switch for V-band satellite applications, thereby contributing the progression of space-based RF technology.