bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and structure of polycrystals MnCo2O4-GdCrO4
Authors: Mataev M.M. , Patrin G.S. , Мeldeshov A.A. , Seitbekova K.Zh. , Zhaisanbaeva M.E.
Published: October 2024

The article discusses the synthesis and structure of polycrystalline nanocomposite MnCo2O4-GdCrO4 material. The sol-gel method was used as a synthesis of the study. Using X-ray phase analysis (XPA), the structure of the synthesized nanomaterial composition was determined: spinel – cobalt manganate and perovskite – gadolinium chromite. Based on the results of the analysis, it was established that the polycrystalline two-phase composite is a system of spinel-cubic and perovskite-tetragonal types. Morphological analysis of the nanocomposite was carried out using a scanning electron microscope (SEM). According to the data obtained as a result of SEM, the elemental composition was confirmed and the average nanosize of the nanomaterial was obtained, and the content of the compound increased to x2000 was determined, the particle size of MnCo2O4 is 383-281 nm, GdCrO4 – 1.63-1.34 µm; increased to x4000, particle size – MnCo2O4 277-219 nm, GdCrO4 – 1.48-1.27 µm; increased to x6000, particle size – MnCo2O4 239-209 nm, GdCrO4 –1.21-1.07 µm.
Определение углеродного следа в рамках оценки жизненного цикла электрической энергии в Республике Казахстан
Authors: Муратова К.Г. , Капсалямов Б.А. , Кожиков М.Т.
Published: October 2024

Глобальное потепление, вызванное выбросами парниковых газов в окружающую среду, способствовало принятию Казахстаном международных обязательств по сокращению высвобождаемых эмиссий в атмосферный слой земли на соответствующем уровне в сравнении с базовыми показателями. Сектор энергетики является одним из главных факторов антропогенного воздействия на окружающую среду, в том числе на изменение климата. При этом на сегодняшний день в Казахстане мощности энергетических объектов обусловлены использованием станций, работающих на угле, эмиссии парниковых газов которых находятся в пределах высоких показателей. В данной статье приведена оценка углеродного следа национальной системы выработки электрической энергии, а именно показателей выбросов парниковых газов в пределах, охватывающих наиболее существенные процессы всего жизненного цикла. В рамках данного исследования предложен подход к оценке углеродного следа продукции, обусловленный использованием методологических указаний в рамках нормативных документов Республики Казахстан и международных методологий. Также проведено сопоставление результатов выбросов парниковых газов в разрезе этапов жизненного цикла электрической энергии. Дана оценка вклада жизненного цикла электрической энергии в пределах влияния на изменение климата.
Self-propagating high-temperature synthesis of AlN–TiC powder composition using sodium azide and C2F4 fluoroplastic
Authors: Belova Galina S. , Titova Yulia V. , Maidan Dmitry A. , Yakubova Alsu F.
Published: October 2024

Producing powder compositions using conventional processing technology can lead to the formation of large agglomerates and, therefore, makes it difficult to obtain a uniform microstructure. The production of composites by self-propagating high-temperature synthesis can reduce costs and the number of technological stages, as well as lead to obtaining composites that are more homogeneous. Synthesis by the combustion of mixtures of powder reagents of sodium azide (NaN3), fluoroplastic (C2F4), aluminum and titanium with different ratios of reagents in a nitrogen gas atmosphere at a pressure of 4MPa was used for the production of a highly dispersed powder ceramic AlN–TiC composition. Thermodynamic calculations have confirmed the possibility of synthesis of AlN–TiC compositions of different formulations in combustion mode. The dependences of temperature and combustion rate on the composition of the initial mixtures of reagents were experimentally determined for all stoichiometric reaction equations. The study have shown that the experimentally found dependences of combustion parameters on the ratio of the initial components correspond to the theoretical results of thermodynamic calculations. The formulation of the synthesized composition differs from the theoretical composition by a lower content of target phases and the formation of Al2O3, Na3AlF6 and TiO2 side phases. The powder composition consists of aluminum nitride fibers with a diameter of 100–250nm and ultradisperse particles of predominantly equiaxed and lamellar shapes with a particle size of 200–600nm. As the combustion temperature increases to produce the largest amount of titanium carbide phase, the particle size increases to the micron level.
Microstructure and strength of a 3D-printed Ti–6Al–4V alloy subjected to high-pressure torsion
Authors: Usmanov Emi I. , Savina Yana N. , Valiev Roman R.
Published: October 2024

Currently, one of the effective 3D printing methods is wire-feed electron-beam additive manufacturing (EBAM), which allows producing large-sized commercial billets from Ti–6Al–4V titanium alloy. However, Ti–6Al–4V alloy produced by this method demonstrates reduced strength properties. It is known that it is possible to increase the strength properties of metallic materials by refining their grain structure by high-pressure torsion (HPT). This work is aimed at studying the influence of high-pressure torsion on the microstructure, and mechanical strength of a structural Ti–6Al–4V titanium alloy produced by the wire-feed electron-beam additive manufacturing method. The microstructure of a 3D-printed Ti–6Al–4V alloy in the initial state, and after high-pressure torsion, was studied using optical, scanning and transmission electron microscopy. An EBSD analysis of the material in its original state was carried out. The microhardness of the material in the initial and deformed states was measured. Using the dependence of the yield strength on microhardness, the estimated mechanical strength of the material after processing by the high-pressure torsion method was determined. The microstructural features of the 3D-printed Ti–6Al–4V alloy after high-pressure torsion, which provide increased strength of this material, are discussed. The research results demonstrate that 3D printing, using the electron-beam additive manufacturing method, allows producing a Ti–6Al–4V titanium alloy with a microstructure unusual for this material, which consists of columnar primary β-grains with a transverse size of 1–2mm, inside of which martensitic α'-Ti needles are located. Thin β-Ti layers with a thickness of about 200nm are observed between the α'-Ti needles. Further deformation treatment of the alloy, using the high-pressure torsion method, allowed forming an ultrafine-grained structure in its volume, presumably consisting of α-grains with an average size of (25±10)nm. High-pressure torsion of the 3D-printed alloy allowed achieving rather high microhardness values of (448±5)НV0.1, which, according to the HV=2.8–3σy ratio, corresponds to the estimated yield strength of approximately 1460MPa.
Corrosion-mechanical destruction of bainite structures in oilfield environments
Authors: Vyboishchik Mikhail A. , Gruzkov Igor V.
Published: October 2024

The main direction in solving the problem of increasing the reliability of field equipment, is the creation of new steels with higher resistance to corrosion-mechanical destruction. Currently, to produce oil and gas pipeline systems, low-carbon, low-alloy steels are used, in which lath carbide-free bainite is formed when quenched in water. Such a structure provides a combination of high strength and resistance to brittle fracture. However, issues of increasing corrosion resistance are still open. The purpose of this work is to identify the structural condition of low-carbon, low-alloy, pipe steels, providing a combination of high mechanical properties with increased corrosion resistance in oilfield environments. The studies were carried out on the latest generation 08KhFA, 08KhFMA and 05KhGB steels, most popular when manufacturing oil and gas pipelines. Samples for the study were cut from the pipes and quenched from the austenite region in water, which formed the structure of lath carbide-free bainite. The quenched samples were tempered at temperatures of 200, 300, 400, 500, 600, and 700°C. To identify the relationship between the morphology of bainite structures and their properties, the samples after quenching and tempering at each temperature, were subjected to metallographic analysis, X-ray diffraction analysis, mechanical tests, and corrosion resistance tests. The work shows the sequence of structure transformation, temperature ranges of phase and structural transformations, changes in mechanical properties, and corrosion resistance that occur during tempering of lath carbide-free low-carbon bainite. It is shown that tempering of lath carbide-free bainite (08KhFA, 08KhMFA and 05KhGB steels) does not affect the rate of carbon dioxide corrosion. It has been found that medium tempering forms the structural condition of carbide-free low-carbon lath bainite providing a combination of high mechanical properties and high corrosion resistance in oil field environments. For each of the steels under study, the authors give recommended heat treatment modes.
The influence of phosphorus microalloying on the structure formation of CuZn32Mn3Al2FeNi multicomponent brass
Authors: Gnusina Anastasiya M. , Svyatkin Aleksey V.
Published: October 2024

Phosphorus in brass can have both a positive effect, such as improving mechanical properties, increasing corrosion resistance and machinability, and a negative effect, such as adversely affecting weldability and causing cracking. The study of the role of phosphorus in the processes of brass structure formation is of practical relevance, since it helps optimise the properties of the material, reduce the risk of defects, improve treatment processes and control properties and quality. The work covers the study of the role of phosphorus in brass, the need to control its content during production by limiting the share of secondary use. The study revealed the possibility of a positive effect of modifying copper alloys with phosphorus in order to improve performance properties, as well as the prospects of using phosphorus as a safe replacement for lead in brass. The authors assessed the content and distribution of phosphorus impurity at a concentration of 0.005% in a brass sample of the CuZn32Mn3Al2FeNi grade, studied the nature of its interaction with other components of the alloy and the changes occurring at different temperatures of heat treatment. It has been found that phosphorus actively participates in diffusion processes and forms phosphides in both defective and defect-free blanks. When heated to the hot deformation temperature range, phosphorus redistribution occurs, phosphide locally dissolves, and metastable inclusions form. Due to differences in the concentration of elements in areas adjacent to the phosphide, the brass structure changes leading to the formation of areas different from the matrix β-phase. Manganese phosphide in brass can improve its mechanical properties and cutting ability, but an excess of this compound can lead to problems with strength, crack resistance, and moulding.
Trends in the development of the practice of using accumulative mechanisms of pension provision in OECD countries
Authors: Balynin Igor V.
Published: October 2024

The relevance of the study of issues related to the development of the practice of using pension provision accumulative mechanisms is out of question due to the challenges faced by pension systems of countries around the world. The research methodology is based on economic and mathematical tools for processing data characterizing the indicators of using accumulative mechanisms of pension provision in OECD (Organization for Economic Cooperation and Development) countries. The paper defines groups of OECD countries depending on the supplier of pension products, as well as the type of pension plan. Based on the analysis of data on the use of pension plans depending on the above factors, the author identified the countries-leaders in each of the identified groups. Based on the results of the study, a list of key trends in the development of the practice of using accumulative mechanisms of pension provision in OECD countries was formulated. The largest group of countries included those states where contracts for pension products are concluded mainly with non-state pension funds. Among the results obtained, it is necessary to highlight the lack of parity in the application of all types of pension plans supplied by non-state pension funds, since the dominance of any one of the types is recorded in each state. The results of the study will have practical significance when implementing substantiations of state decisions on issues of regulating the practice of using accumulative pension mechanisms as an integral component of the pension system of the Russian Federation. This is especially important in the context of achieving the national goals of the development of the Russian Federation for the period up to 2030, implementing the Strategy for the Development of the Pension System of the Russian Federation for the period up to 2030 and the Strategy for the Development of the Financial Market of the Russian Federation until 2030.
Development of the market of digital financial assets in the context of ensuring financial sovereignty of Russia
Authors: Zhironkin Sergey A. , Safiullin Lenar N. , Konovalova Mariya E. , Kuzmina Olga Yu.
Published: October 2024

Currently, in the context of limited external funding, the issues of forming the financial sovereignty of the country are becoming the subject of scientific discourse among Russian economists. The introduction of digital financial assets (DFA) into business practice and their legislative recognition largely ensures the expansion of investment opportunities for economic entities, which will contribute to the end of the stagnant macroeconomic shock of the period of 2021–2024. The work covers solving such scientific problems as clarifying the essential nature of DFA and developing their classification; assessing the process of functioning of the investment market based on the use of digital financial instruments; identifying key limitations in the functioning of the basic institutions regulating the DFA circulation. The authors proposed a clarified formulation of the economic category of digital financial assets, taking into account the peculiarities of its essential nature. An analysis of the functioning of the domestic DFA market is carried out. Among the factors hindering the development of the DFA market, its fragmentation, low liquidity, and weak institutional regulation of the issue and circulation of DFA are highlighted. The authors emphasize the positive effect of the development of the digital infrastructure of the market, in particular, the increase in the number of investment platforms licensed by the Bank of Russia, the reduction of costs of access to them, the development of a market-making system in the secondary market of digital financial assets. The authors believe that the leveling of the contradictions of the investment market should occur due to the improvement of the institutional environment in the field of strengthening control over transactions with digital financial assets, as well as ensuring their mandatory registration, which is absent at the present stage. The development of the domestic market of digital financial assets has significant potential due to, firstly, the desire of economic entities to replace traditional financial instruments with digital ones, which allow reducing significantly transaction and transformation costs; secondly, the expansion of investment opportunities for economic actors through the use of digital platforms and other elements of the digital ecosystem for the purpose of business development; thirdly, the transformation of the traditional business model, which provides for the transition from vertical interaction of entities to a network form of coordination of economic agents using decentralized financial instruments in their activities.
Equality and justice as the basis for unification of the right of citizens for an insurance labor pension
Authors: Kozhevnikov Roman  O. , Vershinina Svetlana I.
Published: October 2024

The differentiation of the right of citizens of the Russian Federation for an insurance labor pension by gender provided for by the current legislation raises questions in civil society due to the discrepancy between the norms fixing different retirement ages for men and women, the principle of equality guaranteed by the Constitution of the Russian Federation, and ensuring social justice in society. One of the reasons is that a significant proportion of men do not live to the 65-year retirement age fixed by law. Analyzing the current legal norms and comparing them with statistical data and the results of law enforcement indicating a clearly unfair standardization of these relations, the authors offer their own vision of solving the existing problems. The authors substantiate the conclusion on the necessity to unify the right of citizens for an insurance pension by establishing a common retirement age of 60 years for men and women for the period of solving the main demographic problems in the state and creating conditions for increasing life expectancy. At the same time, emphasizing the special role of women, the authors propose to include legislatively the time associated with the birth and upbringing of children in a woman’s insurance experience, regardless of whether a woman had previous employment relationships and insurance experience. It should be done to create a favorable regime for the formation of women’s insurance experience and ensure formal equality with men.
Legal personality of officials of the prosecution authorities in criminal proceedings
Authors: Korchagina Kristina Aleksandrovna
Published: October 2024

In modern criminal procedural science, there is no doubt that the prosecutor and subordinate prosecution officers are participants in criminal proceedings. Separate disputes arise only when discussing the issue of classifying the prosecutor as a party to the prosecution. At the same time, the role and functions of officials of the prosecution authorities in criminal proceedings are not so obvious and unambiguous. Although Part1 of Article37 of the Code of Criminal Procedure of the Russian Federation assigns the functions of supervision and criminal prosecution to the prosecutor, the heads of the prosecution authorities and the employees subordinate to them do not always pursue these goals, and officials of the prosecution authorities do not always act in the status of a prosecutor or public prosecutor. Analyzing the current norms of criminal procedural legislation and comparing them with the actual legal personality of prosecutorial employees entering into relations with participants in criminal proceedings, the author substantiates the conclusion about the necessity to distinguish between two fundamentally different legal statuses of the prosecution officials. The first one is the official status of the prosecutor as the head of the prosecution authority, allowing him to exercise state powers to supervise the preliminary investigation bodies without accepting the additional procedural status of a participant in legal proceedings. The second one is the criminal procedural status acquired by an official of the prosecution authority, including a prosecutor, for a certain period (stage, phase) of criminal proceedings to carry out one of two procedural functions – criminal prosecution (acquires the status of a public prosecutor) or law enforcement function, protection of the interests of an individual, society and the state (acquires the status of other prosecutor or a prosecutor representative).
Abuse of right, unequal counter-execution, artificial debt in the context of challenging of debtor’s transactions under bankruptcy proceedings
Authors: Chuklova Elena Valerievna , Babich Aleksandr V.
Published: October 2024

The ambiguity of interpretation of the rules applied when challenging transactions within the framework of the initiated bankruptcy case and the absence of clear criteria for the grounds for challenging debtor’s transactions determine the reasonability of a deep comprehensive theoretical study of such categories as abuse of rights, unequal counter-execution, and artificial debt. The conducted analysis of judicial practice allowed concluding that invalid debtor’s transactions concluded with abuse of rights in order to create artificial debt or with unequal counter-execution are identified by signs, based on the personal conviction of a judge, but still allowing them to be established with a high degree of reliability. Such signs, in particular, include: economic inexpediency of a transaction, when, for example, in the presence of financial difficulties, the debtor sold the capital goods, thereby depriving himself of his main activity and profit; transfer of funds by the debtor in transit through friendly organizations, returned to the debtor in the form of a loan from a controlled organization; raising of a cash loan from individuals who do not have the financial ability to provide a loan; the supplier’s inability to deliver goods for which the debtor has incurred a debt; the absence of information about the transaction in the accounting statements of the debtor and its counterparty, etc. The authors believe that the absence of grounds for liability for intentional actions to create artificial debt and abuse of rights, the absence of clear criteria for the equivalence of counter-execution lead to the fact that unfair participants in economic turnover receive an unjustified benefit. In this regard, the authors propose to define more clearly in the law special grounds for challenging debtor’s transactions for the intentional creation of artificial credit debt, the withdrawal of debtor’s assets, and to establish grounds for liability and consequences for unfair persons.
Review of the series of lectures “Forensic Science: a short series of lectures for students of the training program 40.03.01 Jurisprudence” by E.S. Shurshalova, S.N. Smolkov
(Shurshalova E.S. Kriminalistika: kratkiy kurs lektsiy dlya obuchayushchikhsya po napravleniyu podgotovki 40.03.01 Yurisprudentsiya [Forensic Science: a short series of lectures for students of the training program 40.03.01 Jurisprudence] / E.S. Shurshalova, S.N. Smolkov. – Saratov, Obshchestvo s ogranichennoy otvetstvennostyu “Amirit” Publ., 2023. – 179 p. – ISBN 978-5-00207-230-9)
Authors: Shoshin Sergey V.
Published: October 2024

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Integrating linked open data in mobile augmented reality applications - a case study
Authors: Vert Silviu , Vasiu Radu
Published: October 2024

In this paper we develop a model and implement a prototype that integrates user-generated linked open data and open government data in a mobile augmented reality tourism application that works in the browser of the mobile device. We present some challenges met in this endeavour and solutions to overcome them, as well as propose further issues that should be addressed by research in this field.
Application of the Scoring Model for Assessing the Credit Rating of Principals
Authors: Janeska Margarita , Sotiroski Kosta , Taleska Suzana
Published: October 2024

One of the most commonly used methods for assessing the credit rating of counterparties is a credit scoring model or credit scoring. Economic pressures, resulting in increased demand for loans, along with increasing the competition in the market of enterprises and the development of computational techniques and technologies leads to the development of statistical credit scoring model, and in order to expedite the process for making decisions related to credit approval. Credit scoring is used to increase the precision in the approval of loans to creditworthy customers, which can result in increased profits or rejection of those customers who are not creditworthy.
The Role and Importance of the Options as a Unstandardized Financial Derivatives
Authors: Dejanovski Aleksandar
Published: October 2024

The financial derivatives are financial instruments, that are recently created, and whose main application is to be used as a tool for managing financial derivatives. The most significant financial derivatives are options, that are mostly used for their flexible and non-standard character. Options, and the other financial derivatives, as well, are instruments that are derived from some other financial instruments, that makes them more complicated from one hand, and more risky, from the other hand. Their role is very important for the developing the financial system, and generating economic growth. The subject of research in this paper is the options as a unstandardized financial derivatives, and their basic characteristics and usage in developed, and developing countries. The prime goal is to research the importance of these derivatives in developing countries, with basic focus in the Republic of Macedonia. The results from these paper should suggest if the options are crutial for the developing the Macedonian financial markets.
On Instantaneous Power Dissipation in Class B Amplifier
Authors: Zhivomirov Hristo , Sirakov Ekaterinoslav
Published: October 2024

The present paper describes the analysis of the instantaneous power dissipation by the two active components in a class B power amplifier. Attention is paid to restrictions of the instantaneous power dissipation relations in reference literature, and the consequences of their misuse. A new generalized equation that takes into account the power dissipated by the two active devices is proposed. The theoretical statement is substantiated by Matlab® numeric computation and visualization, Cadence OrCAD® simulations and measurements of a real-world audio power amplifier performed by NI USB-6211 measurement complex.
Controls Mitigating the Risk of Confidential Information Disclosure by Facebook: Essential Concern in Auditing Information Security
Authors: Kuyumdzhiev Ivan Ognyanov
Published: October 2024

Facebook allows people to easily share information about themselves which in some cases could be classified as confidential or sensitive in the organisation they’re working for. In this paper we discuss the type of data stored by Facebook and the scope of the terms “confidential” and “sensitive data”. The intersection of these areas shows that there is high possibility for confidential data disclosure in organisations with none or ineffective security policy. This paper proposes a strategy for managing the risks of information leakage. We define five levels of controls against posting non-public data on Facebook - security policy, applications installed on employees’ workstations, specific router software or firmware, software in the cloud, Facebook itself. Advantages and disadvantages of every level are evaluated. As a result we propose developing of new control integrated in the social media.
One implementation of API interface for RouterOS
Authors: Stoitsov Gencho , Rangelov Vasil
Published: October 2024

The purpose of this publication is to present the implementation of API interface for RouterOS of the company MikroTik, which allows using PHP scripts for obtaining data for configuration and management of the routing devices that use this OS.
Loss-minimal Algorithmic Trading Based on Levy Processes
Authors: Kia Farhad , Jeney Gábor , Levendovszky János
Published: October 2024

In this paper we optimize portfolios assuming that the value of the portfolio follows a Lévy process. First we identify the parameters of the underlying Lévy process and then portfolio optimization is performed by maximizing the probability of positive return. The method has been tested by extensive performance analysis on Forex and SP 500 historical time series. The proposed trading algorithm has achieved 4.9\% percent yearly return on average without leverage which proves its applicability to algorithmic trading.
Polar Response of a Circular Piston
Authors: Iliev Iliyan
Published: October 2024

The current paper reviews theoretically and examinesexperimentally the polar plotof a loudspeakerin the far and near field.An original equation for sound pressure calculation in the near and far field is proposed. An experiment is conducted to confirm the theoretical data and the accuracy of the proposed expression. Several conclusions are drawn from the analysis of the study.
More on Measuring the Overall Revealed Comparative Advantage
Authors: Hadzhiev Veselin
Published: October 2024

The overall revealed comparative advantages approach aims to summarize the divergent expression of comparative advantages by commodity groups and countries. It represents an alternative to the traditional approach of Bella Balassa, Thomas Vollrath and others. The innovativeness of the overall revealed comparative advantages approach preconditions a certain prudence with regard to its use and interpretation. It is necessary to explore the potential of the approach in different conditions and different circumstances. It was found that the approach of overall revealed comparative advantages is resistant to the Euclidean distances and commodity classifications used for metrification. It has the potential to synthesize uniformly divergent changes in specialization by country and commodity groups and is a useful tool for the analysis of comparative advantages.
Numerical and Analytical Analysis of Elastic Rotor Natural Frequency
Authors: Muminovic Adis J. , Braut Sanjin , Muminovic Adil , Saric Isad
Published: October 2024

In this paper simulation model which enables quick analysis of elastic rotor natural frequency modes is developed using Matlab. This simulation model enables users to get dependency diagram of natural frequency in relation to diameter and length of the rotor,density of the material or modulus of elasticity. Testing of the model is done using numerical analysis in SolidWorks software.
Lane Departure System Design using with IR Camera for Night-time Road Conditions
Authors: Miman Mehmet , Akırmak Osman Onur , Korkmaz Hakkı Can
Published: October 2024

Today, one of the largest areas of research and development in the automobile industry is road safety. Many deaths and injuries occur every year on public roads from accidents caused by sleepy drivers, that technology could have been used to prevent. Lane detection at night-time is an important issue in driving assistance systems. This paper deals with vision-based lane detection and tracking at night-time. This project consists of a research and development of an algorithm for automotive systems to detect the departure of vehicle from out of lane. Once the situation is detected, a warning is issued to the driver with sound and visual message through “Head Up Display” (HUD) system. The lane departure is detected through the images obtained from a single IR camera, which identifies the departure at a satisfactory accuracy via improved quality of video stream. Our experimental results and accuracy evaluation show that our algorithm has good precision and our detecting method is suitable for night-time road conditions.
The Role of Human Resource Management Practice Mediated by Knowledge Management (Study on companies from ICT sector, Croatia)
Authors: Klacmer Calopa Marina , Horvat Jelena , Kuzminski Lea
Published: October 2024

This paper integrates theories and findings of the role of human resources management (HRM) in the process of knowledge management (KM) in the information and communication technologies (ICT) sector in Croatia.In order to succeed, companies must prevent the loss of knowledge. Therefore, they must recognize the importance of human resources as the main factor of business. Only knowledge management enables knowledge sharing.Furthermore, applications of information technology (IT) in the field of HRM can prevent the loss of knowledge and arise the transfer of knowledge among employees.For the purpose of this paper, a survey regarding human resource and knowledge management in IT companies is conducted in order to analyze the structure of HR and the importance of knowledge sharing in an organization.
A Study on the Deformation Behavior of AA7075 Powder with Three-Dimensional Ball Mill
Authors: Soy Gürkan , Korucu Salih
Published: October 2024

Aluminum-based composite materials are frequently preferred in many new-generation engineering applications due to their high strength, wear and corrosion resistance, improvement of mechanical properties, machinability, and low density. Mechanical alloying has an important place in the production of composites with high properties in powder metallurgy, which is one of the composite material production methods. In this study, the deformation of AA7075 powder was investigated with a three-dimensional ball mill designed and produced for use in mechanical alloying processes. Three different rotational speeds (150, 200, 250 RPM), three different b all to powder ratios (1:5, 1:10, 1:20) and three different milling times (30, 60, 90 min) in the milling processes. Deformations in the powders were evaluated by particle size analysis and powder structure examination. The obtained results were analyzed with analysis of variance, regression method, three-dimensional graphics, optical microscope and Scanning Electron Microscope images. When the results are examined, the maximum deformation and powder size among the selected experimental parameters were realized at 150 RPM rotational speed, 1:20 ball to powder ratio, and 90 min.
Numerical Simulation of Different Ventilation Systems in an Airplane Cabin
Authors: Bilir Levent , Çelik Hasan , Özerdem Barış
Published: October 2024

Airplanes are the most popular way of transportation worldwide, especially for long haul. It facilitates the growth of global trade as well, besides promoting tourism and other employment developments. Passenger comfort and hygiene inside an airplane cabin became main concern for aircraft manufacturers. The possibility for a potential spread of infectious virus or bacteria even maximized this concern. Therefore, supplying sterile and particle-free air inside the aircraft cabin became extremely crucial more than ever. In order to ensure comfort and hygiene, regardless of the environment conditions inside the aircraft cabin, paved the way for researchers to focus on this topic, recently. It is obvious that, an important precaution for the spread of micro-organisms can be selecting an adequate air ventilation system inside the airplane cabin. In this study, a part of an airplane passenger cabin is modelled for four different scenarios. The streamlines of air, which is sent to the cabin from air ducts, are obtained and air flow path is observed for the investigated cases. The results of the numerical simulations are presented as the outcomes of this study. It is observed that the air mixing between different seat rows occur slightly only for sidewall supply and bottom return mixing ventilation and displacement ventilation systems, whereas the air mixing for the same seat row is seen for all ventilation systems. In conclusion, sidewall supply and bottom return mixing ventilation system is found the most appropriate one, even though it causes air recirculation at the same row seats.
Some Perturbed Trapezoid Inequalities for n-times Differentiable Strongly log-Convex Functions
Authors: Dönmez Demir Duygu , Şanal Gülsüm
Published: October 2024

The aim of this study is to introduce some inequalities for n-times differentiable strongly log-convex functions. The perturbed trapezoid inequality is used to establish the new inequalities. It is seen that these inequalities have a better upper bound than the inequalities obtained for log-convex functions. Besides, the mentioned inequalities for strongly log-convex functions are reduced to the ones given for log-convex functions with a suitable choice of the arbitrary constant.
Hybrid Use of Business Process Management and Analytical Hierarchy Process Method in Supplier Selection in the Automotive Industry
Authors: Sayar Mahmut
Published: October 2024

The fact that businesses act with certain systematics while continuing their operations in constantly changing market conditions enables businesses to increase their internal communication activities, reduce their costs, and thus increase their productivity. Business Process Management studies allow businesses to gain these privileges that they should have. The supplier selection process is a complex problem involving many factors simultaneously and many different applications are used to solve these problems. The Analytical Hierarchy Process method is one of the most popular multi-criteria decision-making techniques. It mentioned in many studies in the literature and is known as an effective supplier selection method that uses qualitative and quantitative data together. In this study, the supplier selection operation of an important company in the automotive industry has been made more systematic by using a hybrid of Business Process Management, Analytical Hierarchy Process method and Responsibility Assignment Matrix. It is aimed to fill the gap in this area, guide effective supply chain management integration and supplier selection operation in automotive sector.
Encoding Vertices in Rectangular Grid Graphs with Eliminating Errors
Authors: Caylak Kayaturan Gokce
Published: October 2024

An undirected graph G = (V,E) where V is a set of vertices and E =V ×V is the set of pair of adjacent edges or in other words it is the set of edges. In theory, a graph can be a model of a message delivery in a network. We assume that the computer network has a particular shape which we call as a rectangular grid and there is a computer on each vertex in the graph. Each vertex v∈V is labelled by a subset of universal set U that models the header of a message sent between two distinct computers in G. We present a way to encode routes in the graph G by encoding all distinct vertices u,v ∈V in the routes. We aim that these codes prevent errors denoted by false positives, therefore, results in a more efficient use of network resources.
An Unusual Presentation of Chaput Tubercle Fracture with Coexisting Bimalleolar Component Involving Lateral and Posterior Malleoli: A Case Report
Authors: Kothimbakkam Prem Kumar , Murugesan Vijayashankar , Vadivelkumar Bharath , Gokulakrishnan Esa
Published: October 2024

Background: Chaput tubercle fracture is a counterpart to adolescent Tillaux fracture, which occurs at the anterolateral part or the attachment site of the antero-inferior tibiofibular ligament on the distal tibia. It is rare, and its presentation may not be well appreciated in X-rays, which depicts the importance of a computed tomography (CT) scan of the ankle to reveal the same.
Case Report: A 25-year-old gentleman presented to Chettinad Hospital, India, casualty with acute onset of pain, swelling, and restricted movements at the ankle joint following a road traffic accident. Ankle CT revealed a Chaput fracture along with a bimalleolar fracture (posterior and lateral malleoli). The complex displaced fracture was managed with open reduction internal fixation (ORIF) with plate osteosynthesis for the posterior malleoli and lateral malleoli, and tension band wiring was done for the Chaput tubercle fracture. At the end of two-year follow-up, the patient was able to mobilise without any support.
Conclusion: Through this case report, we would like to enumerate the rarity of Chaput tubercle fracture associated with bimalleolar fracture of the ankle, which will be evaluated better with a CT evaluation in the first place. At the same time, it gives valuable information for the preoperative surgical plan.
Introduction to Adaptive Sports: An Intervention Protocol for Youth
Authors: Emery Erica , Zahl Melissa L. , Nelson Rhonda , Green Michael
Published: October 2024

Certified therapeutic recreation specialists (CTRS®s) within pediatric rehabilitation inpatient (PR-I) units use a variety of treatment modalities. One such modality is adaptive sports. Positive emotions that can be generated when participating in an adaptive sports activity include enjoyment and gratification. CTRSs are able to provide youth in the PR-I unit with a unique experience that teaches them about adaptive sports while introducing a potential new leisure pursuit. Thus, the Introduction to Adaptive Sports program was developed with the intent of documenting youths' knowledge related to adaptive sports following brief exposure, their enjoyment of activities associated with four different adaptive sports, and their interest in future participation. The youth involved in the piloting of this protocol were asked to complete a Knowledge and Future Participation Quiz as well as an Enjoyment Scale to measure their level of knowledge about each adaptive sport presented, how much they enjoyed participating in each session, and if they would be interested in future participation. The results showed that the youth demonstrated strong knowledge about each adaptive sport (average scores of 5.06 out of 6). The scores on the Enjoyment Scale indicated that youth on the PR-I unit enjoyed the adaptive sports sessions (average scores of 8.38 out of 10). Additionally, participant responses indicated 78.13% overall interest in future participation in the four presented adaptive sports. Though the preliminary results from the trial of this protocol are encouraging, recommendations for revision and future study by CTRS professionals on PR-I units are included.
„Mam na Pana nowy zamach…” Wybór korespondencji Jerzego Giedroycia z historykami i świadkami historii 1946–2000
Authors: Giedroyc Jerzy , Nowinowski Sławomir M. , Stobiecki Rafał , Brzezińska Anna , Przybysz-Gralewska Milena
Published: October 2024

Jerzy Giedroyc miał dwie pasje – politykę i historię. Przez ponad pół wieku konsekwentnie realizował własną politykę historyczną. Jego działalność w tym zakresie zmierzała do gruntownej rewizji historycznego imaginarium Polaków. W najogólniejszym sensie, dążenie to wyrastało z doświadczeń II Rzeczypospolitej i bolesnej lekcji II wojny światowej. Społeczną funkcję wiedzy o przeszłości Jerzy Giedroyc rozumiał jako krytyczny, wielogłosowy i wolny od wszelkich tematów tabu namysł nad przeszłością Polski, jej relacjami z sąsiadami oraz miejscem w Europie. Chciał, aby była to refleksja wolna od wszelkich „fanatyzmów narodowych, klasowych, rasowych, religijnych, obyczajowych”.
Prezentowana Czytelnikowi trzytomowa edycja korespondencji Jerzego Giedroycia z badaczami przeszłości i jej bohaterami została przygotowana w ramach projektu Narodowego Programu Rozwoju Humanistyki „Jerzy Giedroyc, historycy i świadkowie historii”. Składające się na nią listy z zasobu Archiwum Instytutu Literackiego w Paryżu nie były dotychczas publikowane. Zawierają nie tylko mniej lub bardziej poufne glosy do historiograficznych debat toczonych na łamach „Kultury” i „Zeszytów Historycznych”, zaprezentowanych przez edytorów w tomie W poszukiwaniu innej historii. Antologia tekstów opublikowanych na łamach periodyków Instytutu Literackiego w Paryżu (WUŁ, 2015). Odnaleźć w nich można również wiele nieznanych, a nawet sensacyjnych informacji o działalności krajowych i emigracyjnych placówek naukowych, warunkach życia i specyfice pracy dziejopisarzy oraz świadków historii, wreszcie o kulisach wydarzeń politycznych, społecznych i kulturalnych, których jedni i drudzy byli uczestnikami.
Praca zrealizowana w ramach grantu Narodowego Programu Rozwoju Humanistyki, Nr 0033/NPRH3/H11/82/2014
Análisis de errores en la adquisición de los modos indicativo y subjuntivo por estudiantes polacos de Español como Lengua Extranjera
Authors: Kruszyńska Agnieszka
Published: October 2024

La selección modal y la oposición entre los modos indicativo y subjuntivo son unos de los temas que provocan más problemas a los estudiantes polacos que intentan aprender español. Si bien el polaco y el español son idiomas con muchas diferencias significativas en sus sistemas, la oposición modal es una de las que más obstaculizan el aprendizaje. Desde el punto de vista de los mismos profesores, dicha oposición es uno de los temas más complejos, especialmente si se trata de profesores no nativos.
La razón por la que se escogió este tema de investigación responde a un escaso número de trabajos científicos contrastivos entre el polaco y el español centrados en el alumnado polaco y la aplicación del subjuntivo. Además, en el futuro, este trabajo puede servir para desarrollar un estudio más amplio que abarque otros aspectos y la complejidad de las lenguas en cuestión. Asimismo, puede suponer una base para los futuros investigadores que quieran profundizar en el tema y, a su vez, ahondar en el aspecto teórico-práctico del proceso de enseñanza-aprendizaje de la oposición modal en el mundo del Español como Lengua Extranjera (ELE).
Este trabajo de investigación tuvo como objetivo, en primer lugar, examinar el estado actual de la cuestión presentada y, en segundo lugar, llevar a cabo un análisis pormenorizado de los errores cometidos por los estudiantes polacos en cuanto a la selección modal. En ese sentido, la presente tesis doctoral cuenta con una dimensión tanto teórica como práctica, ya que brinda pautas a los profesores que trabajan o van a trabajar con estudiantes de español provenientes de Polonia.
A Commentary: Invisibility of Older African-American Adults in Electrophysiological Research on Alzheimer’s Disease
Authors: Holston Ezra C.
Published: October 2024

Background

Currently, researchers are examining the feasibility of integrating electrophysiological biomarkers in the clinical assessment of older adults (≥65 years of age) with Alzheimer’s disease (AD). This research has been executed predominantly in older Caucasian adults. Older African-American adults have not been effectively recruited for this research. This issue has resulted in a significant gap in the literature about electrophysiological biomarkers and potential clinical utility in assessing for and diagnosing AD in older African-American adults.

Purpose

To share an opinion about the invisibility of older African-American adults in electrophysiological research on AD and potential outcome their inclusion can have on the integration of electrophysiological biomarkers into clinical practice.

Methods

For this commentary, it was necessary to determine the status of older African-American adults in electrophysiological research. Studies were identified using the search engines PUBMED, CINAHL, Elsevier, and Scopus with a time range of between 2016 and 2022. Nineteen peer-reviewed studies supported this commentary.

Results

In older Caucasian adults with AD, electrophysiological biomarkers were associated with the onset and progression of AD. These biomarkers related to the cognitive impairment of AD and its manifestations. There were no studies characterizing any electrophysiological biomarkers in older African-American adults with AD.

Conclusion

Research is growing to support the integration of electrophysiological biomarkers into clinical practice. The invisibility of older African-American adults in this research affects the reliability of electrophysiological biomarkers and their application to persons with AD in racially diverse groups. This invisibility also contributes to health disparities confronting older African-American adults with AD and their caregivers.