bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a general algorithm for solving the stability problem of anisotropic plates
Authors: Guliyev Shahin , Shukurov Rizvan , Huseynzade Hajar , Hasanov Aliyar , Huseynova Leila 
Published: May 2024

This paper is devoted to the development of general algorithm for solving to the stability problem of anisotropic plates using the additional load discretization method. The study of the stability problem is relevant for all types of structural elements and machine parts, and its importance is especially increasing with respect to anisotropic thin plates. This is due to the fact that with the use of new structures and materials, the material intensity is reduced, the area of application of thin-walled systems with low stiffness, for which the danger of elastic loss of stability increases, and, therefore, the importance and relevance of the theory and methods of practical solution of problems of elastic stability of such structures increases.
In many works, analytical expressions for determination of critical load are given. At present, the determination of critical loads causes great difficulties in their numerical determination. Therefore, the article presents the most effective numerical and analytical solution of this problem.
As a rule, to solve stability problems of anisotropic plates, different representations of the bending deflection function in different rows are used. But the use of such representations is justified only under certain boundary conditions and under the condition of uniformly distributed load. The study described in this paper offers a way to overcome these difficulties, allowing the numerical values of critical forces to be determined without much difficulty. With increasing grid density, the accuracy of the critical load value increases rapidly and with an 8×8 grid, the deviation from the exact solution equal to is 1 %.
From a practical point of view, the discovered mechanism of numerical realization of this problem allows to improve engineering design calculations of stability of anisotropic plates with different conditions on supports and with different loading
Identifying some regularities of the turbulent steady-state plane-parallel motion of incompressible fluid at the entrance length
Authors: Sarukhanyan Arestak , Vermishyan Garnik , Kelejyan Hovhannes , Gevorgyan Armine 
Published: May 2024

This paper investigates the structural changes in the turbulent motion of an incompressible fluid in the hydrodynamic entrance region of plane-parallel pressure motion. Movement in pressure hydromechanical systems usually occurs in a turbulent regime. Studying the patterns of changes in hydrodynamic parameters under conditions of stationary turbulent pressure motion in the inlet region is a very urgent task. The study was carried out on the basis of boundary layer equations. Taking into account the dependence of changes in the kinematic viscosity coefficient that occur between layers of fluid, a boundary value problem was formed. Analytical solutions have been obtained that make it possible to obtain patterns of changes in velocity and pressure in any effective flow section. Based on the general conclusions of the study, solutions were found for two cases:

a) the velocity of the fluid entering the cylindrical pipe is constant;
b) the velocity of the incoming fluid has a parabolic distribution.

For these cases, using computer analysis of the data obtained, general graphs of velocity changes were constructed in various sections along the hydrodynamic entrance region. These graphs, which display the change in velocity along the entire length of the inlet, make it possible to obtain the velocity of fluid movement at any point along the inlet length and estimate the length of the transition zone. The results obtained are among the least studied issues of classical fluid mechanics and are of important theoretical interest. The results obtained are applicable for the correct construction of the hydrodynamic entrance region of machinery. A calculation formula has been obtained to determine the length of the hydrodynamic inlet region
Development of a new ergonomic risks management algorithm on the example of drivers
Authors: Tsopa Vitaliy , Cheberiachko Serhii , Cheberiachko Yurii , Deryugin Oleg , Chencheva Olga , Rieznik Dmytro , Klimov Eduard , Lashko Yevhenii , Pashko Dmytro , Biliaieva Viktoriia 
Published: May 2024

The object of the study: the process of determining and managing ergonomic risks at workplaces when performing professional activities on the example of truck drivers.
The problem lies in uncertainty when making decisions in occupational safety and health management systems. The hypothesis of the study was the possibility of assessing ergonomic risks in the occupational safety management systems of organizations based on the identification of regularities between the load index, typical working postures when performing operations and the intensity of joint movements.
An ergonomic risk assessment algorithm was developed, taking into account the load index, which includes a sequence of eleven steps, which can be conditionally divided into three groups. The first is determination of the intensity of joint movement. The second is the determination of the impact of activity and the duration of the production task. The third is determining the impact of environmental factors. An assessment of the ergonomic risk of drivers was carried out for three types of production work: driving a vehicle, replacing a damaged wheel, and repairing a car. At the same time, the ergonomic risk assessment algorithm takes into account the worker’s individual state of health and environmental factors, as well as experience and work experience. It has been established that there is a high level of ergonomic risk during car maintenance due to the highest total load index, which is 30 % higher compared to other types of work of vehicle drivers.
The practical application consists in the development of a universal check list of drivers based on an algorithm to determine the ergonomic risk of workers at workplaces, which consists of 11 steps
The determination of the features of the process of mixture formation of hydrogen burner
Authors: Romanova Kateryna , Mitchenko Ivan 
Published: May 2024

The use of hydrogen fuel as an alternative source of individual heat supply is a rather promising direction in the development of thermal energy. However, due to the physical properties of hydrogen and the peculiarities of its combustion, several problems arise for the practical use of hydrogen heat generators. Such problems include ensuring flare stability and large emissions of thermal nitrogen oxides (NOX). For stable operation of the hydrogen burner, safe operation, and reduction of nitrogen oxide emissions when burning hydrogen, first, it is necessary to ensure high-quality pre-mixing with air.
This work presents the first stage of research into the operation of a hydrogen burner for heat production in the Flow Simulation module of the SolidWorks software environment. For volume flow rates of air and hydrogen corresponding to capacities of 1, 1.5 and 2 kW and air excess coefficient α=1.6. The given design makes it possible to ensure uniform mixture formation (the volume fraction of hydrogen is approximately 18.5 % at the outlet cross-section of the burner and the speed at the outlet of the burner is 5.4, 8.1, and 10.8 m/s, respectively. The burner is a nozzle with a short premixing chamber First, hydrogen is supplied for mixing into the air flow through symmetrically located holes. After that, a vortex is created, which ensures high-quality mixing of gases with a short length of the burner, as well as a uniform distribution of velocity at the exit.
The obtained results allow to proceed to the next stage – the study of hydrogen combustion processes in the combustion chamber of the contact heat generator, which would ensure the formation of a stable flame and low NOX emissions. In addition, this design can be used in the development of hydrogen burners for heating boilers to meet the needs of private homes and small businesses
Improvement of the methodology for determining the movement parameters of individuals with visual impairments during evacuation from higher education institutions with inclusive education using a simplified analytical model
Authors: Dotsenko Oleksandr , Khlevnoi Oleksandr , Kovalyshyn Vasyl , Parkhomenko Volodymyr-Petro , Dyven Valentyn , Borysova Anna , Vovk Sergiy 
Published: May 2024

The object of the study is the movement parameters of mixed evacuation flows, which include participants with visual impairments. Such parameters are the speed of movement, density and the percentage of participants with visual impairments in the flow.
Solving the problems of calculating the duration of evacuation of the population from educational institutions with inclusive education is very relevant, since this process has a significant feature that is not typical for evacuation from most residential and public buildings. In such educational institutions, all students move in groups under the control of scientific and pedagogical workers. This feature is not taken into account in the regulatory documents that fix the methods of calculating the duration of evacuation. The numerical parameters obtained by authors allow to solve this problem.
According to the results of the experiment, 241 measurements of the speed and density of the flow were made on horizontal sections, 204 – during the descent of the stairs and 206 – during the ascent. The dependences between these parameters were established by conducting regression analysis. As part of the experiment, flows were monitored with a variable value of the percentage of people with visual impairments in the flow. Thanks to this, the impact of the increase the number of people with visual impairments in the flow on the speed of movement on various sections of the evacuation routes was established.
The analysis of the obtained results shows that the appearance of the first participant with visual impairments in the flow leads to a decrease in the speed of movement. In the future, the relationship between a decrease in speed and an increase in the percentage of traffic participants with visual impairments is linear.
The obtained dependencies can be used as input parameters for calculations of the duration of evacuation in educational institutions with inclusive education according to a simplified analytical model and allow obtaining smaller deviations from the results obtained in real conditions (3.4–25 %) compared to the current individual model (35, 5–52.3 %)
Identifying of the wine-making potential of the autochthon madrasa grape variety of different colors and quality
Authors: Fataliyev Hasil , Malikov Ahmad , Lezgiyev Yusif , Gadimova Natavan , Musayev Teymur , Aliyeva Gulshan 
Published: May 2024

Madrasa grape variety, juice, pulp, wine material, auxiliary materials, technological methods and tools were taken as the object of research. Madrasa is an autochthonous grape variety belonging to the Nagorno-Karabakh region of Azerbaijan. The lack of full study of the quality resources of this variety, especially its color (red, pink and white) and lack of research in the direction of producing wines that differ in quality remains a problem.
The sugar-acid index and phenolic ripeness were determined in Madrasa grape variety, reflecting the optimum ripeness.
Active color and Colagel Clar were used in order to obtain natural wines with different colors. As the dose of the drug increases, the corresponding decrease in the amount of these substances is noticed. At the dose of 80 g/hl of the drug, both total and monomer anthocyanins were not matched and the sample became colorless.
While the wine sample that was not stored and matured (control) received 7.7 points, the wine sample stored for 6 months in internally burned barrels had 7.9 points, and during that time, the internal the sample of wine stored in an unburnt barrel was rated 8.5 points. A sample of wine stored in internal fired barrels for 12 months was evaluated with 8.6 points and a sample stored in non-internally fired barrels with 8.7 points. An apparatus-technological scheme for the production of wine, which differs from the autochthonous Madrasa grape variety in terms of color and quality, has been developed. The technological scheme allows the production of wine varieties that differ in terms of gin and maturation period, based on the existing flow line for the production of red wine
Determination of the possibility of the synthesis of Zn-Al layered double hydroxides, intercalated with peroxyanions, as a perspective solid disinfectant
Authors: Kovalenko Vadym , Borysenko Anastasiia , Kotok Valerii , Verbitskiy Volodymyr , Medianyk Volodymyr , Stoliarenko Viktoriia , Pepa Yuriy , Simchenko Serhii , Ved Viktor , Ghazali Sheikh Ahmad Izaddin Sheikh Mohd 
Published: May 2024

Infectious diseases in the modern world pose a significant threat to humanity in the form of epidemics and pandemics. To prevent and combat them, it is necessary to carry out antiseptic and disinfectant treatments of various environments, household and industrial surfaces, as well as wounds of various origins. Double-layer hydroxides intercalated with peroxyanions as active oxygen compounds are promising materials for this.
In order to determine the possibility of obtaining Zn-Al double-layer hydroxide intercalated with peroxylactic acid anions, samples were synthesized by the method of chemical co-precipitation in the presence of peroxylactic acid at controlled pH (8, 10) and t=20 ℃. The properties of the synthesized samples were investigated. The content of active oxygen (in terms of H2O2) was determined by the method of iodometric titration with the calculation of the percentage of hydrogen peroxide that was intercalated in double layered hydroxides, remained in the mother solution or was lost. The crystal structure was studied by X-ray phase analysis, the yield of samples was determined gravimetrically, and sedimentation was determined by measuring and normalizing the thickness of the sediment layer.
It was found that the samples synthesized at pH=8 and 10 are biphasic and consist of an oxide phase and a double-layer hydroxide phase. The determined content of active oxygen (in terms of H2O2) in the samples synthesized at pH=8 (0.533 %) and at pH=10 (0.876 %) confirms the success of the synthesis of Zn-Al-peroxylactate double layered hydroxides. Synthesis at elevated pH is promising. A low percentage of H2O2 intercalation was revealed – 4.03–6.54 %, the majority of hydrogen peroxide (82.36-94.44 %) remains in the mother solution.
The yield of the synthesized samples was determined to be 61.9 % and 79.5 % at synthesis pH of 10 and 8, respectively. The sedimentation properties of the samples were studied and their improvement was shown when the pH of the synthesis was increased
Comparative genomics of carbapenem-resistant Pseudomonas aeruginosa strains sequence type 3151 isolated from two major hospitals in Hanoi, Vietnam
Authors: Quang Huy Nguyen , Bich Ngoc Do , Thanh Tam Tran Thi , Thu Hang Le Thi , Nhung Doan Thi , Bañuls Anne-Laure 
Published: May 2024

Carbapenem-resistant Pseudomonas aeruginosa belongs to the critical species of global priority pathogens, nevertheless, molecular mechanisms of such resistance in low- and middle-income countries are limited. In this context, we conducted a comparative genomic analysis between two clinical carbapenem-resistant P. aeruginosa strains VD641 and XP646 isolated from hospitals in Hanoi, Vietnam. The phenotypic-resistant profile revealed that both strains were resistant to at least 26 drugs belonging to 6 different antibiotic classes, and therefore they were identified as extensively drug-resistant bacteria. The chromosomal genome of strain VD641 was 7.1 Mb with GC a content of 65%, while the genome of XP646 consisted of an approximately 7.3 Mb with a GC content of 64.8%. The two strains belong to sequence type 3151 (ST3151). Genomic comparative analysis revealed that VD641 possessed higher numbers of antimicrobial resistance genes compared to XP646 (35 and 26 genes, respectively). This data was in accordance with their antibiotic-susceptibility profiles. Notably, the strain VD641 acquired a multidrug-resistant gene region with 223 kb in length carrying 11 antibiotic-resistant genes. Strains VD641 and XP646 acquired a blaIMP-15 and blaKPC-2 carbapenem-resistant gene, respectively. Analysis of virulent protein-protein interaction networks revealed six gene clusters involving the pathogenicity of the ST3151. Finally, four plasmids found in P. aeruginosa XP646 (n=1) and VD641 (n=3) carried different ARGs genes. The draft genomes and plasmid sequences of P. aeruginosa VD641 and XP646 were submitted to GenBank under BioSample accessions SAMN39268202 and SAMN39268203, respectively. The findings in our study underline that genomic surveillance is essential for management of carbapenem resistance emergence in healthcare setting in Vietnam.
Investigation of the influence of microalgal culture medium on biomass production
Authors: Dong Phuong Nguyen Thi , Bao Ly Dau Thi 
Published: May 2024

Microalgae have been shown to produce a variety of products, including biofuels, proteins, and beta-carotene. However,increasing their biomass production still requires a lot of effort from researchers. Biomass from different culture media has presented challenges and possible solutions to improve microalgae production efficiency. In addition to factors such as light and temperature, nutrients also affect microalgal culture media. This study has developed basic experiments revolving around the fluctuations of essential nutrients such as carbon (C), nitrogen (N), phosphorus (P) during the cultivation ofChlorella vulgaris on Bold’s Basal Medium (BBM). As a result, reducing or increasing the N and P concentrations by half,and replacing C in NaHCO3 with glucose significantly changed the growth curve of C. vulgaris. There were significant fluctuations in the microalgal characteristics of the lag phase and the stable phase, with the former being longer and the latter being shorter compared to BBM. Additionally, the maximum biomass obtained was 1.95 g/L dry weight when microalgae were cultivated in medium containing glucose (M1), where the C concentration was replaced by glucose, and 1.56 g/L when the P content was increased 1.5 times compared to 1.35 g/L of dry weight in BBM. However, reducing or increasing nitrogen content by half inhibited cell growth, leading to low biomass efficiency of only 1.07 g/L and 1.21 g/L, respectively. On the other hand, changes in the essential nutritional composition of the culture medium also affected the efficiency of settling of C. vulgaris, this value was higher than 80% in all media compared to BBM.
Osobliwości braków Ewangelii Galilejskiej (Q)
Authors: Odziomek Mateusz 
Published: May 2024

Artykuł przybliża brakujące elementy materiału Q ze wskazaniem na ich specyficzne osobliwości wynikające z analizy krytycznej i porównawczej. W zestawieniu z ewangeliami synoptycznymi Q wyróżnia się brakiem: ciągłości narracji, przekazów o cudach, opisu śmierci i zmartwychwstania Jezusa. Istotne luki w tradycji Q ukazują jego odmienne spojrzenie na Mistrza z Nazaretu — jawi się On jako prorok i wysłannik królestwa Bożego — pełen mocy, uosobienie Mądrości. Podczas gdy Marek, Mateusz i Łukasz w swoich ewangeliach zachęcają do wiary w Jezusa, Ewangelia Q wzywa do pójścia za Nim i naśladowania Go.
Obowiązek w świadomości dzisiejszej młodzieży
Authors: Zachara Magdalena 
Published: May 2024

Artykuł ukazuje, jak dzisiejsza młodzież rozumie pojęcie obowiązku. Kontekst badań to pandemia COVID-19 oraz postmodernistyczna aksjologia. Wyniki wykazują, że nastolatkowie pojmują obowiązek jako odpowiedzialność, zarówno w kategorii moralnej, jak i prawno-społecznej. Przypisują mu ważną rolę we własnym rozwoju oraz w życiu społecznym.
Constraining Parameter Uncertainties in the Coulomb Rate–State Approach: A Case Study of Seismicity in the Longmenshan Region after the 2008 Mw 7.9 Wenchuan Earthquake, China
Authors: Feng Yashan , Xiong Neng , Shan Bin , Wang Rongjiang , Xiong Xiong 
Published: May 2024

Abstract
The rate–state frictional law, coupled with the Coulomb failure stress changes (ΔCFS), is one of the most popular physics-based models to forecast seismicity rate changes following a major earthquake. However, its effectiveness is hampered by parameter uncertainties. To seek possible solutions for such uncertainties, this article carried out retrospective forecasts of the decade-long seismicity in the Longmenshan region, China, after the 2008 Mw 7.9 Wenchuan earthquake, and proposed methods to constrain parameter uncertainties. First, we derived spatially variable ta and Aσ from fault-slip rates. This method not only provides observational constraints for these two parameters but also reflects spatial variations of fault rate–state properties. Second, although both complete and declustered background catalogs are common in Coulomb rate–state forecasts, this study demonstrated that declustering avoids false alerts of seismicity rate increase that resulted from temporary seismicity fluctuations in the background catalog. Finally, we extended the model from its typical application based on a stress step (the coseismic stress change) to a calculation that allows a more complex stress evolution (the postseismic viscoelastic stress change). With these methods to constrain parameter uncertainties, we are able to obtain more reliable forecasts.
Morphometric assessment of sternal foramina and sternal variations
Authors: Rizvi Shaheen Sajid Abbas , Sawant Sharadkumar Pralhad 
Published: May 2024

The sternum is a crucial component of the thoracic cage. Its articulations and divisions play an important role in providing structural support to the thoracic cage and facilitating movements. The body of the sternum originates from four mesenchymal bars known as sternebrae, Incomplete fusion of the sternebrae or failure of fusion can lead to the development of a sternal foramen. The clinical significance of a sternal foramen lies in the potential risks associated with medical procedures such as acupuncture or sternal puncture for bone marrow biopsy. A study was conducted on 100 sterna at K. J. Somaiya Medical College to find out the presence of sternal foramen, to study their site, size and shape and to discuss its clinical Implications. 20% of the specimens were found to possess a sternal foramen. The vertical to transverse diameter of these foramina were in the range of 4.4 – 6.9mm. Most of the foramen were found to be at the level of 3 and 4 costal notches followed by Xiphoid process. The study also observed the variations in the shape of the manubrium and the body of the sternum and the variations of the Xiphoid process. Failure to recognize the presence of sternal foramina can pose serious risks during medical procedures, potentially leading to damage to the pericardium and heart. Therefore, it is essential for healthcare practitioners to be aware of these variations and consider obtaining X-ray or CT scans to assess sternum morphology before performing invasive procedures. The study emphasizes the importance of comprehensive anatomical knowledge and careful clinical assessment when dealing with the sternum and underscores the need for precautionary measures to prevent complications associated with sternal foramina.