bluuebunny/crossref_metadata_2025_split huggingface dataset:
Short- and Long-term Clinical Outcomes of Balloon-expandable Versus Self-expanding Valves in Patients Undergoing Transcatheter Aortic Valve Replacement: A Meta-analysis
Authors: Wong Jie Jun , Gan Eugene , Gao Fei , Keh Yann Shan , Amanullah Mohammed Rizwan , Lim Soo Teik , Aziz Zameer Abdul , Govindasam Sivaraj , Chao Victor Tar Toong , Ewe See Hooi , Ho Kay Woon , Yap Jonathan 
Published: November 2023

Background: Distinct clinical differences exist between balloon-expandable valves (BEVs) and self-expanding valves (SEVs) used in transcatheter aortic valve replacement (TAVR) for aortic stenosis. However, randomised data on comparative outcomes are limited. The aim of this meta-analysis was to analyse the differences in short- and longer-term clinical outcomes between the two valve designs. Methods: A comprehensive literature search for all studies up to and including April 2020 on the clinical outcomes of BEVs versus SEVs was performed. Study outcomes were divided into short term (in-hospital or 30 days), intermediate term (1 year) and long term (3 years). The primary outcome was all-cause mortality. Secondary endpoints were stroke or transient ischaemic attack (TIA), life-threatening or major bleeding, at least moderate paravalvular leak (PVL), permanent pacemaker (PPM) implantation, aortic valve area (AVA) and aortic valve mean pressure gradient (AV MPG). Results: A total of 41 studies (BEV, n=23,892; SEV, n=22,055) were included. At in-hospital/30 days, all-cause mortality favoured BEV (OR 0.85; 95% CI [0.75–0.96]). BEV had lower rates of PVL (OR 0.42; 95% CI [0.35–0.51]) and PPM (OR 0.56; 95% CI [0.44–0.72]), but smaller AVA (mean −0.09 cm2; 95% CI [−0.17, 0.00]) and higher AV MPG (mean 2.54 mmHg; 95% CI [1.84–3.23]). There were no significant differences in the incidence of stroke/TIA or bleeding between the two valve designs. At 1 year a lower PPM implantation rate (OR 0.44; 95% CI [0.37–0.52]), fewer PVLs (OR 0.26; 95% CI [0.09–0.77]), smaller AVA (mean −0.23 cm2; 95% CI [−0.35, −0.10]) and higher AV MPG (mean 6.05 mmHg; 95% CI [1.74–10.36]) were observed with BEV. No significant differences were observed in mortality, stroke/TIA or bleeding. There was no significant difference in mortality at 3 years between the two valve designs. Conclusion: In the short–intermediate term, SEVs had better valve haemodynamics but had higher PVL and PPM implantation rates than BEVs. However, there were no differences in intermediate–long-term mortality, stroke or TIA, or bleeding complications. A better understanding of these differences will enable TAVR operators to tailor their valve choice based on individual patient profile.
Development of a flavored oil composition based on hemp oil with increased resistance to oxidation
Authors: Kunitsia Ekaterina , Kalyna Viktoriia , Haliasnyi Ivan , Siedykh Kostiantyn , Kotliar Oleh , Dikhtyar Aliona , Polyansky Pavlo , Ivanov Gennady , Baranova Olena , Bolhova Nataliia 
Published: November 2023

The way to solve the problem of stabilizing hemp oil against oxidative deterioration while preserving its nutritional value is considered. The peculiarity of the work consists in the development of a flavored oil composition based on hemp oil, which has a high resistance to oxidation. The object of the study is the indicators of the composition and the period of induction of accelerated oxidation of refined hemp and corn oils depending on their ratio and the content of antioxidants (essential oils of coriander, basil and thyme) in the oil composition. A rational ratio of hemp and corn oils in the oil composition of 6:4, respectively, was determined. The consumer properties of this mixture are: the induction period of accelerated oxidation – 4.0 hours, the content of a-linolenic fatty acid – 10.6 % of the total amount of fatty acids. The ratio of essential oils of thyme, coriander, and basil in the complex was determined, with the addition of which the period of induction of accelerated oxidation of the flavored oil composition exceeds that of the original one by 3.75 times. A feature of the obtained results is the possibility of increasing the shelf life of the flavored oil composition based on hemp oil, which allows expanding the range of its consumer properties. From a practical point of view, the development allows you to increase the shelf life and receive additional income from the sale of new, high-quality, competitive products for health-improving use. An applied aspect of using the scientific result is the possibility of creating a range of salad oil compositions based on valuable hemp oil with different organoleptic indicators depending on the ratio of the components of the complex of essential oils
Identifying the operating features of a device for creating implosion impact on the water bearing formation
Authors: Ratov Boranbay , Borash Ardak , Biletskiy Marian , Khomenko Volodymyr , Koroviaka Yevhenii , Gusmanova Aigul , Pashchenko Oleksandr , Rastsvietaiev Valerii , Matуash Oleksandr 
Published: November 2023

The object of the study reported in this paper is the parameters of a device for implosion impact on aquifers during well development.
The problem of increasing the productivity of aquifers was solved by removing colmatation products formed during the drilling process and restoring the natural permeability of the formations. This could ensure high production of wells and their long-term trouble-free operation. One of the most effective ways to develop wells is implosion impact. However, its use is hampered by the complexity of the structure of existing devices, the high cost of use, and the insufficient reliability of their operation. To overcome this, an original device for implosion impact on aquifers was designed and its operating parameters were determined.
A procedure has been devised for determining the maximum permissible sizes of intervals not filled with liquid under the conditions of preventing casing string collapse. The effect of these intervals on reducing the total weight of the casing string was investigated.
An optimal well structure was proposed for the conditions of the Tonirekshin field. The critical dimensions of empty intervals were calculated for all wall thicknesses of casing pipes included in the well design. It has been established that the amount of weight reduction of the casing string in the well due to the Archimedean force for field conditions is 43–47 %. Archimedean force increases with increasing pipe wall thickness. Reducing the weight of the casing string reduces the required winch power, allowing the use of lighter drilling rigs.
The procedure for preparing for repeated implosion impacts has been studied.
The studies performed and the recommendations presented will be effective when drilling and developing wells under the conditions of the Mangistau Peninsula, at the Tonirekshin field.
Development of an algorithm for the reasoned selection of machines for leather garments manufacturing
Authors: Zakharkevich Oksana , Zhylenko Tetyana , Koshevko Julia , Shvets Galina 
Published: November 2023

The technology of processing clothing elements is very mobile and changes with the appearance of new materials and equipment. The selected design and technological solutions that ensure the conformity of aesthetic properties and requirements can be satisfied through continuous improvement of sewing production technologies. This study aims to develop an algorithm for choosing the optimal equipment, taking into account the material parameters and the permissible requirements for the technological process of manufacturing sewing products from artificial leather. As a result of the analysis of the range of sewing machines and manufacturing companies, Juki sewing machines were chosen to build a complex matrix of machine equipment. A morphological scheme of the selection process and a mathematical description of the two-dimensional matrix of elements have been developed. That has made it possible to reflect the simultaneous consideration of all process components and their influence on the technological parameters of the machine. The database of the parameters of the equipment selection system was built in the form of matrix elements: a matrix of the type of operations, a matrix of material coatings, a matrix of the base of materials, a matrix of machine assignments, and a matrix of qualifications. Each matrix is a production rule for making a decision at a separate selection stage. The operation matrix was constructed using the TechLab mobile application, which includes 50 processing schemes for artificial leather products. The analysis of the schemes has made it possible to determine the frequency of occurrence of types of seams for processing artificial leather products: 1.01.01 (28.75 %), 2.01.01 (16.75 %), 1.06.02 (11.00 %), 2.02.01 (15.50 %), 5.01.01 (24.25 %), 6.02.01 (3.75 %). The mathematical notation of the algorithm for choosing the optimal machine equipment has made it possible to visualize the structure of the process using a graph. The graph was built using Gephi. Such a notation takes into account the qualification of the worker, the type of technological operation, and the material’s properties, including the material’s thickness, coating, and base.
Design and evaluation of hollow frame structures for the development of urban-centric two-passenger electric vehicles
Authors: Tullah Muhammad Hidayat , Sumarsono Danardono Agus , Susanto Iwan , Zainuri Fuad , Prasetya Sonki , Noval Rahmat , Permana Sulaksana , Aprianto Bayu Dwi 
Published: November 2023

This paper focuses on the design and evaluation of hollow frame structures for the development of two-passenger electric vehicles targeted for urban use. The primary problem addressed is the lack of focused research on efficient, lightweight, and safe electric vehicle frame designs, particularly for urban transportation needs. Through 3D simulation and Finite Element Analysis (FEA), this paper successfully develops a hollow frame design with dimensions of 2,148×800×640 mm and a weight of 40.77 kg that meets strength and stiffness criteria. The analysis shows that the design has an adequate safety margin with a safety factor of 2.053e+01. ASTM A36 steel is chosen as the material, balancing strength, stiffness, and cost. The results offer an innovative and practical solution to urban transportation issues, with broad potential applications in the electric vehicle industry. In particular, this study focuses on the specialized needs of urban-centric, two-passenger electric vehicles. The Finite Element Analysis (FEA) used here serves as a robust validation method, effectively reducing the need for extensive physical testing. This accelerates the R&D process and opens possibilities for future studies on alternative materials and dynamic loading conditions. The study's limitations and future research directions are also discussed. Moreover, the study's computational methods offer an eco-friendly alternative to traditional physical prototypes. This aligns with sustainability goals and provides methodologies for future studies. With rising urban populations, the demand for efficient vehicles is increasing. This study paves the way for city-focused, two-passenger electric cars that meet modern urban needs and sustainability goals
Development of a multi-loop security system of information interactions in socio-cyberphysical systems
Authors: Yevseiev Serhii , Dzheniuk Nataliia , Tolkachov Maksym , Milov Oleksandr , Voitko Tetiana , Prygara Mykhailo , Shpak Oleksandr , Voropay Natalia , Volkov Andrii , Lezik Oleksandr 
Published: November 2023

The object of the study is a multi-loop security system of information interactions in socio-cyberphysical systems. The dynamic nature of physical environments inherently challenges the ability of socio-cyber-physical systems to perform adequate control actions for physical assets in many contexts. However, adaptation and evolution actions must be evaluated before implementation in the control system to ensure fault tolerance while minimizing risks. Therefore, the design of socio-cyber-physical systems must ensure not only reliable autonomy, but also operational fault tolerance and safety. The proposed approach is based on the integration of targeted (mixed) threats based on the synthesis of technical cyber threats with social engineering methods. This approach allows forming a dynamic security model based on the analysis of the interaction of various agents in socio-cyberphysical systems, which makes it possible to increase the level of counteraction to targeted (mixed) cyber threats.
The results of modeling are based on the proposed classification of threats using social engineering methods, which allows cyberattackers to ensure the probability of implementing targeted threats up to 95–98 %. The proposed classification of threats based on social engineering methods will allow forming an additional parameter for the objectivity of target threats, taking into account their integration and synergy. At the same time, the presented model will make it possible to timely provide knowledge about the possibility of implementing a targeted attack and timely take preventive countermeasures. This approach will improve the set of protection measures, as well as promptly create an increase in the level of resistance of the company's personnel (organization, enterprise, etc.) to threats of social engineering
Power supply via fiber-optical conductor for sensors of mine working monitoring system
Authors: Mekhtiyev Ali , Dunayev Pavel , Neshina Yelena , Alkina Aliya , Aimagambetova Raushan , Mukhambetov Gabit , Kirichenko Lalita , Kazambayev Ilyas 
Published: November 2023

The article describes a system of power transmission via fiber-optic cable, which allows the supply of power to sensors and other electronic devices of ultra-low power located in places of mining workings, for which the mandatory requirement is fire safety. The developed system will allow to replace the application of copper conductors. The result of this research is the developed laboratory bench that allows measuring the current and voltage parameters in the photodetector branch. The equivalent generator method has been used, as well as the known circuit laws with two dedicated nodes for an active two-terminal network. When analyzing the literature, the existing scientific achievements, and discoveries in the field of research, an own concept of research has been formed that is different from foreign analogs. During the experiment, the studies have been performed when the photodetector was in the short circuit, idle mode, and connected to a high-resistance load. Based on the results obtained, current-voltage characteristics (CVC) and histograms have been built using a radiation source (laser) with a power of 10 and 30 mW. The parameters and technical characteristics of the irradiated silicon crystal and the radiation source have been given. The obtained electrical power has been determined using the known laws of electrical engineering, including the Ohm law. To process the experimental data, there has been used quadratic interpolation of the function, the results of the root-mean-square approximation, and there has been carried out the regression analysis. Absolute and relative errors have been calculated. The Student coefficient has been determined with a confidence interval of 0.95. Based on the results of the study, the efficiency of the power transmission system has been determined
Expansion of the functional capacities of electrostatic mirror analyzers for electron spectroscopy
Authors: Kambarova Zhanar 
Published: November 2023

Electron spectroscopy methods are widely used in scientific research and for technological purposes. The main element of spectrometers is an analyzer of charged particle beams. Electrostatic mirror systems are widely used due to their simpler practical realization. At their development two purposes were set: to improve the quality of spatial focusing of charged particles or to increase the value of linear energy dispersion. The objects of the study are electrostatic systems characterized by small sizes, simplicity of stabilization and localization of the working field and its shielding from the external electromagnetic disturbances. From all the known types of energy analyzers, suitable for the analysis of solid surfaces, preference is given to those that have good electron-optical properties, are simple in manufacture and operation. Therefore, spherical and cylindrical mirrors, which have become a basic tool for firms producing spectrometers, have been chosen as the object of study. The work solves the problem of expansion of the functional capacities of these systems by, firstly, combining several research methods in one device; and secondly, by solving specific narrower problems. A photoelectron or Auger spectrometer with an increased scanning area is proposed, where the initial angular opening of the beam 4° after passing a cylindrical mirror is increased to 10°, and the image smearing is reduced to 0.05 %. An Auger-electron spectrometer for analysis of rough surface has been developed, which allows to increase the probing depths by more than 5 times. A double filter type energy analyzer is calculated. Energy resolution was improved to 1.37 % by eliminating potential barrier smearing in low energy filter mode. Previously, the energy resolution was limited to 10 % due to this drawback
Revealing patterns in the behavior of a reinforced concrete slab in fire based on determining its stressed and deformed state
Authors: Sidnei Stanislav , Berezovskyi Andriy , Kasiarum Serhii , Lytvynenko Olha , Chastokolenko Ihor 
Published: November 2023

The object of research is the fire resistance of reinforced concrete ribbed slabs. The subject of research is the effect of the level of mechanical load on the fire resistance of the studied reinforced concrete ribbed slab under the influence of fire. Currently, the assessment of the fire resistance of such structures using the tabular method is significantly limited by certain geometric parameters of these plates. It is also not considered possible to apply the zone method, since reinforced concrete ribbed slabs consist of components that receive thermal effects according to various scenarios and geometric parameters, which is not taken into account in Eurocode 2.
Experimental calculations carried out in the current work using a refined procedure involving the finite element method allow solving the actual scientific and technical problem related to the determination of the dependence of the fire resistance of these structures on the level of load applied.
The calculation of the temperature spread over a reinforced concrete ribbed slab under the influence of the standard temperature regime of fire was carried out using convection and radiant heat exchange, which is recommended by Eurocode 2. The iterative implicit Newton-Raphson method was used to solve the mechanical problem. Evaluation of fire resistance of reinforced concrete ribbed slabs was carried out according to the onset of signs of the limit state of fire resistance due to the loss of load-bearing capacity. According to the results, it was established that at 100 % load level of the structure under investigation, the critical deflection of more than 268 mm and the rate of growth of deformation exceeding 18 mm/min were recorded simultaneously on minute 43.9.
According to the results of the research, the regularity of the limit of fire resistance of reinforced concrete ribbed slabs from the level of the applied mechanical load was established. This will make it possible to design and build buildings and structures using the specified building structures with guaranteed fire resistance classes, which improves the level of safety for people at the facilities
The development of a method for assessing the preparation of aviation personnel participated in ensuresing flight safety
Authors: Dolzhenko Nadezhda 
Published: November 2023

The problem solved in the research is to increase the efficiency of decision making in the tasks of professional training of pilots while ensuring the specified reliability, regardless of the hierarchy of the system of evaluation indicators. The object of the research is the professional training system for civil aviation pilots. The subject of the research is the process of assessing the qualities of civil aviation pilots using fuzzy cognitive maps. The hypothesis of the research is to increase the number of indicators for assessing the quality of training of civil aviation pilots with restrictions on the efficiency and reliability of decision making. A method has been developed for assessing the preparedness of aviation personnel involved in ensuring flight safety.
The method consists of the following sequence of actions:
– input of initial data;
– standardization of numerical values of concepts of a fuzzy cognitive model of preparedness of aviation personnel involved in ensuring flight safety;
– transition of numerical values of concepts of a fuzzy cognitive model of preparedness of aviation personnel involved in ensuring flight safety;
– building a fuzzy cognitive model;
– determination of quantitative estimates (ranks) of the importance of model elements;
– calculation of importance indices of model elements.
Based on the results of the analysis of the effectiveness of the proposed method, it is clear that the proposed assessment method increases the accuracy of the assessment of aviation personnel involved in ensuring flight safety by 23 % compared to the known ones. It is advisable to use the developed method in decision making support systems for assessing the quality of professional training of aviation personnel in order to increase the efficiency and reliability of decisions made.
Identifying the influence of reinforcement ratio on crack behaviour of rigid pavement
Authors: Soehardjono Agoes , Wibowo Ari , Nuralinah Devi , Aditya Candra 
Published: November 2023

The problem found in many rigid pavement concrete slabs is the occurrence of cracks. Research on the width of cracks in rigid pavement due to the influence of reinforcement ratio is necessary because the stiffness and strength of concrete slabs are related to slab thickness, concrete quality, reinforcing steel quality and reinforcement numbers. This study aims to determine the cracking behavior of rigid pavements subjected to monotonic static line loads due to variations in reinforcement ratio experimentally. Specimens tested in the laboratory were 2×0.6×0.2 m concrete slabs placed on 30 cm thick soil with 6 % CBR value as a support. The variation of reinforcement ratio was ρ=0.004; ρ=0.007; ρ=0.01; ρ=0.02. Concrete quality fc=30 MPa, steel quality fu=580 MPa. The results shows at small reinforcement ratios the results are close to the average crack width of the formula from the regulations and at large reinforcement ratios the results are further away from the average crack width based on the formula in the regulations. The largest crack width observed in this study occurred in rigid pavement with a reinforcement ratio of ρ=0.004, under a load of 210 KN, resulting in a crack width of 0.519 mm. It was found that the relationship between crack width and the reinforcement ratio follows a linear equation across all variations. The research also revealed variations in crack width between experiments conducted under different design codes, with results closely aligning with the average crack width determined by rule-based formulas, especially for a small reinforcement ratio (ρ=0.004). Conversely, for a larger reinforcement ratio (ρ=0.01), the results deviated further from the crack width predicted by the code-based formula